KENWOOD TS-140S (02) PDF MANUAL

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How is the frequency displayed in different modes?

The displayed frequency in each mode is listed below:

Mode	Display frequency
USB, LSB	Carrier point frequency
CW	Transmit carrier frequency
AM, FM	IF filter center frequency

What is the timing sequence for transmit/receive switching after the standby switch is activated?

The timing after the standby switch is switched to transmit and until the system returns to the receive state is as follows:

1. When SS goes low, the microprocessor judges whether the frequency is transmittable or not. If so, the microprocessor switches CTX high 10ms after SS goes low.

2. Module unit (X59-3340-00) receives the CTX signal, and causes TXB and RL to go high.

3. CKY goes high 2ms after TXB goes high, CKB is driven to generate the keying voltage.

4. The transmit signal is emitted approximately 7ms after the CKB is actuated.

5. To return to receive, the transmit signal stops approximately 7ms after the SS line goes high, and TXB and RL return low, as RXB goes high.

6. The RB voltage used for turning on the receive signal line goes high 12ms after RXB goes high, and a signal is received.

What are the roles of the control signals in the Standby Control Circuit?

The role of each of these signals is described below:

SS: Reference signal to control each signal (standby switch, PTT switch, and key input)

CTX: Control signal from the microprocessor to generate TXB

RB: Control signal to mute the receive signal line

CKY: Control signal for keying

TXB: 8V line for the transmit circuits

RXB: 8V line for the receive circuits

RL: 13.8V line for the transmit circuits

CKB: 8V line for keying generated by CKY

How does manual keying operate in break-in mode?

When the standby switch is turned ON, the base of Q90 (2SA1162Y) goes low, and Q91 (DTC114EK) turns on. CSS goes low, and CTX from the microprocessor turns on Q4 (DTC114EK) of the module unit (X59-3340-00). RL is emitted from Q1 (2SA1204Y), and TXB is applied from Q2 (2SA1204Y). Microprocessor output CKY turns on Q5 (DTC114EK) of the module unit (X59-3360-00), causing the emitter of Q7 (DTC114TK) to go to ground. One end of the Q7 collector is connected to Q87 (2SA1162Y) of the signal unit (X57-3190-00), and the other is connected to the key jack from Q84 (DTC114EK) from the COM terminal via the break-in changeover switch.

Q87 (2SA1162Y) is turned on and produces the CKB voltage when the key is closed, and Q86 (3SK73GR) of the send IF amplifier is keyed.

How does semi-break-in keying operate?

CW8 is applied to the base of Q84 and Q99. Therefore, they are ready to turn on when the emitter is connected to ground.

When the key is closed, the SEM terminal of the module unit (X59-3360-00) is connected to ground through Q99 and Q84 keys.

Q6 and Q2 in the module unit turn on, and trigger one-shot multivibrator IC1 (MB74LS122). A pulse is output from pin 8 to turn Q1 on and connect the SS line to ground.

When the key is closed, the IC8 output pulse returns to a low level and the SS line goes high after a time constant determined by setting of the VOX delay control VR7 and C254.

The key line switches Q87 via the COM terminal at this same time, and keys Q86 in real time.

How does full break-in keying operate and how does it differ from manual keying?

The key connects to the SS line and has the same function as the standby switch. When the key is closed, Q84 turns on, the base of Q90 is connected to the ground, Q91 is turned on, and CSS is switched low. The TXB and RL voltages are generated by the CTX signal, and the CKB voltage is used to generate the CKY signal voltage just as in manual keying.

Full break-in is different from manual keying in that the base of Q87 is controlled directly by the key in manual keying. In full break-in Q87 is controlled via Q5 and Q7 of the module unit (X59-3360-00) by the CKY signal from the microprocessor by turning the SS line on and off.

The reason is that in full break-in, the timing the transmit signal is set so that the radio signal is transmitted after the control signal is completely switched and the transmit system becomes stable; control is passed to receive after the signal stops, a receive signal is output, and the receive system becomes stable.

At what temperatures do the cooling fan and temperature protection features activate?

The surface temperature of the radiator triggers the following:

Cooling fan start: 50 deg C

Cooling fan stop: 45 deg C

Temperature protection start: 80 deg C

Temperature protection stop: 70 deg C

What happens when the temperature protection circuit operates?

When the temperature protection operates, the ALC voltage and the power fall. The system does not return to the receive state automatically.

How much can the IF be shifted during SSB and CW receive?

IF shift allows a shift of ±1kHz or more during SSB and CW receive.

How can the carrier point be adjusted in SSB mode?

The carrier point can be finely adjusted in the SSB mode through a range of -400Hz to +375Hz.

What happens if a PLL loop becomes unlocked?

If any PLL loop becomes unlocked, pin 11 of IC1, IC4, IC14 and/or pin 7 of IC13 go low, and act as an OR circuit. These signals pass through switching transistors Q25 (DTA124ES) and Q26 (DTA124ES), and the “L” is sent to the digital control circuit.

At this point, the microprocessor will display the unlock status, and emits the SBK signal to stop the IF signal before the filter via Q29 (2SC2712Y), and the MUTE signal for stopping the audio signal via Q57 (2SC2712Y) before entering the volume control.

What are the functions of the components in the SWITCH UNIT (X41-3030-XX)?

Component	Use/Function	Operation/Condition/Compatibility
IC1	Microphone amplifier	Processing of audio signals, speech processor.
Q1	Switching transistor	Q1 is ON when PRS is “H”.
Q2~4	Switching transistor	Q2~4 are ON when PKS is “L”.
Q5	Amplification of control signal
Q6	Amplifier	For VOX. TS-140S only
D1	Detection of control signal
D2,3	Switching diode	D2 is ON when RXB is “H”. D3 is ON when PKS is “L”.

What are the functions of the components in the 100W FINAL UNIT (X45-3100-XX)?

Component	Use/Function	Operation/Condition/Compatibility
Q1	Pre-drive amplifier	Wide-band amplification of HF band.
Q2,3	Drive amplifier	Push-pull wide-band amplification of HF band.
Q4,5	Final amplifier	Push-pull wide-band amplification of HF band.
Q6	Supply of bias for drive	Temperature compensation of drive.
Q7	Supply of bias for final	Temperature compensation of final.
Q8	Constant-voltage power supply	5V for digital system.
Q9	Constant-voltage power supply	5V for PLL system.
D1	Temperature compensation	Temperature sensing of pre-drive.
D2	Temperature compensation	Temperature sensing of drive.
D3	Temperature compensation	Temperature sensing of final.
D4	Absorption of surge voltage	Relay for changing over HF and VHF of drive. TS-680S only
D5	Absorption of surge voltage	For fan motor.
D6	Protection of inverse connection	For power supply terminal.
D7	Constant voltage power supply	Power supply of 8.2V for temperature sensor module.

What are the functions of the components in the FILTER UNIT (X51-3040-XX)?

Component	Use/Function	Operation/Condition/Compatibility
Q1	Drive amplifier of 50MHz band	TS-680S only
Q2	Final amplifier of 50MHz band	TS-680S only
Q3	Switching of RAT	Grounds receiving antenna terminal when transmitting.
D1	Absorption of surge voltage of relay	For relay of 500kHz~2.5MHz LPF.
D2	Absorption of surge voltage of relay	For relay of 2.5MHz~4.0MHz LPF.
D3	Absorption of surge voltage of relay	For relay of 4.0MHz~7.5MHz LPF.
D4	Absorption of surge voltage of relay	For relay of 7.5MHz~14.5MHz LPF.
D5	Absorption of surge voltage of relay	For relay of 14.5MHz~21.5MHz LPF.
D6	Absorption of surge voltage of relay	For relay of 21.5MHz~30MHz LPF.
D7	Absorption of surge voltage of relay	For relay of 50MHz~54MHz LPF. TS-680S only
D8	Absorption of surge voltage of relay	For changeover of TX and RX.
D9	Rectification of traveling wave	High-frequency rectification.
D10	Rectification of reflected wave	High-frequency rectification.
D11	Protection from lightning surge	Surge absorber of receiving antenna terminal.

What are the functions and operational details of ICs in the CONTROL UNIT (X53-3100-XX)?

Component	Use/Function	Operation/Condition/Compatibility
IC1	PLL3 (BFO PLL)	1,2,7: Frequency division ratio setting input. 3: 91MHz input (VCO3) in AM mode. 10: VCO lock voltage output. 11: UL line. “L” in UL mode. 15: 4.5MHz input (1/8 fSTD).
IC2	Frequency divider (1/20)	4: 91MHz input. 8: 4.55MHz output.
IC3	Frequency divider (1/10)	1: 4.55MHz input. 2: SFT line. Output is OFF when “H” is input. 12: 455kHz output.
IC4	PLL2 (VFO 10Hz step for covering 50kHz)	1,2,7: Frequency division ratio setting input. 3: 55~60MHz input (VCO2). 10: VCO lock voltage output. 11: UL line. “L” in UL mode. 15: 4.5MHz input (1/8 fSTD).
IC5	Frequency divider (1/10)	4: 55~60MHz input. 8: 5.5~6.0MHz output.
IC6	Mixer (MIX5)	1: 10.05~10.55MHz output. 2: 5.5~6.0MHz input. 5: 4.55MHz input.
IC7	Frequency divider (1/10)	1: 10.05~10.55MHz input. 12: 1.005~1.055MHz output.
IC8	Frequency divider (1/8)	8: 4.5MHz output (1/8 fSTD).
IC9	Mixer (MIX4)	14: Input of reference frequency of 36MHz (fSTD). 1: 5.505~5.555MHz output. 2: 1.005~1.055MHz input. 5: 4.5MHz output.
IC10	Mixer (MIX3)	1: 41.505~41.555MHz output. 2: 5.505~5.555MHz input. 5: 36MHz input.
IC11	Mixer (MIX2)	1: Output of 37.005~37.055MHz (in VCO1-A mode) or 77.505~77.555MHz (in VCO1-C,D mode). 2: 41.505~41.555MHz input. 5: Input of 4.5MHz (in VCO1-A mode) or 36MHz (in VCO1-C,D mode).
IC12	Mixer (MIX1)	3: Output of 3.55~13.5MHz (in VCO1-A mode) or 9.05~20.0MHz (in VCO1-B mode) or 15.95~7.5MHz (in VCO1-C mode) or 12.55~16.5MHz (in VCO1-D mode). 5: Input of 40.555~50.555MHz (in VCO1-A mode) or 50.555~61.555MHz (in VCO1-B mode) or 61.555~70.055MHz (in VCO1-C mode) or 90.055~94.055MHz (in VCO1-D mode). 11: Input of 37.005~37.055MHz (in VCO1-A mode) or 41.505~41.555MHz (in VCO1-B mode) or 77.505~77.555MHz (in VCO1-C mode). VCO1-D mode is TS-680S only
IC13	PLL1 (VFO 50kHz step, last VCO)	1: 4.5MHz input (1/8 fSTD). 5: VCO lock voltage output. 7: UL line. “L” in UL mode. 8: Input of 3.55~13.5MHz (in VCO1-A mode) or 9.05~20.0MHz (in VCO1-B mode) or 15.95~7.5MHz (in VCO1-C mode) or 12.55~16.5MHz (in VCO1-D mode). 9,10,11: Frequency division ratio setting input. 13: Signal for 50kHz output marker.
IC14	PLL4 (HET PLL)	1,2,7: Frequency division ratio setting input. 3: 39.6MHz input (VCO4). 10: VCO lock voltage output. 11: UL line. “L” in UL mode. 15: 4.5MHz input (1/8 fSTD).
IC15	System reset	Generates reset signal when source voltage rises or lowers to make timing of operation and backing up of microprocessor.
IC16	Inverter	1/6, 2/6: Beep tone oscillator. 3/6, 4/6: Shaping of system reset signal wave form. 5/6, 6/6: System clock oscillator (2.45MHz).
IC17	System clock oscillation	Generates interrupt signal for dynamic lighting of indicator lamp.
IC18	CPU	8-bit microprocessor, Z80 (See CIRCUIT DESCRIPTION).
IC19	Address decoder	Divides address signal of CPU and converts chip select signal of each IC and divides memory area of 64kbytes into 8kbytes x 8blocks.
IC20	Static RAM	Makes data such as VFO, memory, etc. for microprocessor. Area capacity: 2kbytes x 8bits. Backed up by system reset signal.
IC21	ROM	Control program (including program for outside control) is built in. Area capacity: 16kbytes x 8bits.
IC22,23	I/O port	Bus interface I/O port. All are set by output ports. (See I/O PORT FUNCTIONS.)
IC24	I/O port	Bus interface I/O port. All are set by input ports. (See I/O PORT FUNCTIONS.)
IC25	Inverter	Absorbs chattering of encoder.
IC26	Counter	Counts pulses of encoder. Two system of quadruplication (CK1,2) and duplication (CK3,4).
IC27	A/D converter	Converts analog voltage input to digital data and output it. 4: RIT. 5: IF shift. 6: Carrier point (LSB) compensation. 7: Carrier point (USB) compensation.

What are the functions and operational details of Transistors (Q1-Q43) and Diodes (D1-D20) in the CONTROL UNIT (X53-3100-XX)?

Component	Use/Function	Operation/Condition/Compatibility
Q1	VCO3 (PLL3)	90.7~91.3MHz.
Q2	VCO3 buffer
Q3,4	BFO buffer	453.5~456.5kHz.
Q5	VCO2 (PLL2)	55.0~60.0MHz.
Q6	VCO2 buffer
Q7	MIX5 output amplifier	10.05~10.55MHz.
Q8	TTL input buffer
Q9	Reference crystal oscillation (OSC)	36MHz (fSTD).
Q10	OSC buffer
Q11	TTL input buffer
Q12	MIX3 input buffer	36MHz
Q13	MIX1 input buffer	37.005~37.055MHz (VCO1-A mode) or 41.505~41.555MHz (VCO1-B mode) or 77.505~77.555MHz (VCO1-C,D mode).
Q14	VCO1 buffer	40.555~70.055MHz or 90.055~94.055MHz.
Q15	PLL IF signal amplification	2.5~22.5MHz.
Q16~18	PLL1 low-pass filter	Active (Reference frequency: 50kHz).
Q19~21	PLL4 low-pass filter	Active (Reference frequency: 5kHz or 25kHz).
Q22	VCO4 (PLL4)	39.6MHz.
Q23	VCO4 buffer
Q24	HET buffer
Q25,26	Shaping of UL signal wave form	Output is “L” in UL mode.
Q27	BPF (PLL) buffer	MIX1 input of 37.005~37.055MHz in VCO1-A mode.
Q28	BPF (PLL) buffer	MIX1 input of 41.505~41.555MHz in VCO1-B mode.
Q29	BPF (PLL) buffer	MIX1 input of 77.505~77.555MHz in VCO1-C,D mode.
Q30	Outside interrupt control	Transfers to program for outside control of personal computer.
Q31	RAM backup control	Transfers to backup mode of RAM when power is OFF.
Q32	BPF (PLL) buffer	Active is “H” in VCO1-C,D mode.
Q33	BPF (PLL) buffer and VCO1-B buffer	Active is “H” in VCO1-B mode.
Q34	BPF (PLL) buffer and VCO1-A buffer	Active is “H” in VCO1-A mode.
Q35	TONE UNIT signal buffer	Active is “H” in FM transmission mode of split memory CH.
Q36	SSB mode signal buffer	Active is “H” in SSB mode.
Q37	CW mode signal buffer	Active is “H” in CW mode (including CWN mode).
Q38	AM mode signal buffer	Active is “H” in AM mode.
Q39	FM mode signal buffer	Active is “H” in FM mode.
Q40	CWN mode signal buffer	Active is “H” in CWN mode.
Q41	MSCR LED driver	Drives LED when memory is scrolling.
Q42	F.LOCK LED driver	Drives LED in F.LOCK mode.
Q43	1MHz LED driver	Drives LED in 1MHz mode.
D1	VCO3 varicap	Frequency variable.
D2,3	VCO2 varicap	Frequency variable.
D4,5	BPF changeover switch	ON in VCO1-B mode.
D6	BPF changeover switch	ON in VCO1-A,C,D mode.
D7,8	Wired OR	“H” in VCO1-A,C,D mode.
D9,10	LPF changeover switch	ON in VCO1-C,D mode.
D11	LPF changeover switch	ON in VCO1-A mode.
D12,13	BPF changeover switch	ON in VCO1-C,D mode.
D14,15	BPF changeover switch	ON in VCO1-A mode.
D16	Wired OR	Composition of PLL1, UL signal.
D17	VCO4 varicap	Frequency variable.
D18	Beep switch	Beep oscillator is turned ON/OFF by beep pulse. Active is “H”.
D19,20	Composition of ROM chip select	Makes 2 blocks of select signal of 8kbytes and use them as ROM select signal of 16kbytes.

What are the functions of the components in the DISPLAY UNIT (X54-3050-XX)?

Component	Use/Function	Operation/Condition/Compatibility
IC1	Serial input-type high-voltage fluorescent indicator lamp	Converts serial indication data from CONTROL UNIT in parallel and turns on fluorescent indicator lamp.
Q1	Fluorescent indicator lamp driver
D1	Switching	F.LOCK
D2	Switching	MV
D3	Switching	M.IN
D4	Switching	DOWN
D5	Switching	VFO/M
D6	Switching	SCAN
D7	Switching	CLEAR
D8	Switching	UP
D9	Switching	USB/LSB
D10	Switching	CW (N/W)
D11	Switching	FM/AM
D12	Switching	1MHz
D13	Switching	A/B
D14	Switching	SPLIT
D15	Switching	A=B
D16	Switching	RIT
D17	Generation of filament bias voltage	Generates bias for filament of fluorescent indicator lamp.
D18	Indication	Turns on red lamp in transmission mode.
D19	Indication	Turns on yellow lamp when M.SCR is ON.
D20	Indication	Turns on green lamp when F.LOCK is ON.
D21	Indication	Turns on green lamp when 1MHz is ON.

What are the functions and operational details of ICs in the SIGNAL UNIT?

Applies to SIGNAL UNIT (X57-3190-00: TS-680S) (X57-3200-XX: TS-140S)

Component	Use/Function	Operation/Condition/Compatibility
IC1	Band data driver	13.8V output.
IC2	Decoding of band data	Open collector. Active is “L”.
IC3	RX: Product detection, TX: BM	455kHz → AF
IC4	Audio power amplifier
IC5	TX 1st mixer	455kHz → 40.055MHz.
IC6	FM IF amplifier, detection, squelch
IC7 (1/4)	DC switch	Turned ON in TX mode.
IC7 (2/4)	AF signal switch	Turned ON in SSB and CW mode.
IC7 (3/4)	AF signal switch	Turned ON in FM mode.
IC7 (4/4)	AF signal switch	Turned ON in AM mode.
IC8 (1/4)	AGC time constant switch	Turned ON in AM mode.
IC8 (2/4)	AGC time constant switch	Turned ON in AGC and SLOW mode.
IC8 (3/4)	Changeover switch of meter	Turned ON in TX/ALC mode.
IC8 (4/4)	Changeover switch of meter	Turned ON in TX/PWR mode.
IC9 (1/4)	S-meter sensitivity switch	Turned ON in 50MHz band mode.
IC9 (2/4)	S-meter sensitivity switch	Turned ON in HF mode.
IC9 (3/4)	Changeover switch of meter	Turned ON in RX mode.
IC9 (4/4)	S-meter sensitivity switch	Turned ON in FM mode.
IC10 (1/4)	ALC level switch	Turned ON in AM and CW mode.
IC10 (2/4)	ALC level switch	Turned ON in SSB mode.
IC10 (3/4)	ALC level switch	Turned ON in power-down mode.
IC10 (4/4)	ALC level switch	Turned ON in mode other than power-down mode.
IC11 (1/4)	ALC amplifier
IC11 (2/4)	Reflected wave voltage amplifier
IC11 (3/4)	Detected output amplifier	Amplifies voltage of traveling wave and reflected wave.
IC11 (4/4)	Power meter amplifier
IC12	8V AVR

What are the functions and operational details of Transistors (Q1-Q99) and Diodes (D1-D503) in the SIGNAL UNIT?

Component	Use/Function	Operation/Condition/Compatibility
Q1	13.8V line switching	Turned ON in 2MHz band mode.
Q2	13.8V line switching	Turned ON in 50MHz band mode. TS-680S only
Q3,4	Switching	Turned “L” in 50MHz band mode. TS-680S only
Q5	8V line switching	Turned ON in 50~54MHz mode. TS-680S only
Q6	8V line switching	Turned ON in 21.5~30.0MHz mode.
Q7	8V line switching	Turned ON in 10.5~21.5MHz mode.
Q8	8V line switching	Turned ON in 0.5~10.5MHz mode.
Q9~11	VCO	Q9: 0.5~10.5MHz Q10: 10.5~21.5MHz Q11: 21.5~30.0MHz
Q12	VCO	50.0~54.0MHz. TS-680S only
Q13,14	VCO output buffer
Q15	VCO output amplifier
Q16,17	Switching	Reduces noise when RF AMP and ATT are turned ON/OFF.
Q18,19	RX 1st mixer	Receiving frequency → 40.055MHz.
Q20	13.8V line switching	Turned ON in RX mode.
Q21	Post amplifier	40.055MHz.
Q22,23	RX 2nd mixer	40.055MHz → 455kHz.
Q27	IF amplifier	455kHz.
Q28,29	Switching	Shunt IF circuit when NB pulse is generated.
Q30,31	IF amplifier	455kHz.
Q32,34	8V line switching	Turned ON in CW mode (excluding CWN).
Q35~39	8V line switching	Q35: SSB Q36: AM Q37: FM Q38: CW Q39: CWN
Q40,41	Switching	Shunt of TX circuit in RX mode.
Q42	Switching	Shunt of RX circuit in TX mode.
Q43	8V line switching	Generates RB.
Q44	8V line switching	Generates AMT and SST.
Q45~47	NB amplifier	455kHz.
Q48	NB buffer
Q49	NB AGC amplifier
Q50	Switching	Set to “L” when NB pulse is generated in NB2.
Q51	Switching	Set to “L” when NB pulse is generated in NB1.
Q52	Switching	Set to “L” when SKB pulse is generated.
Q53	IF buffer	AGC, AM.
Q54	AF buffer	AM.
Q55	Switching	Set to “L” in TX mode.
Q56	AF amplifier
Q57	Switching	Set to “L” in MUT and TX mode.
Q58	AF amplifier	FM.
Q59	AGC amplifier
Q60	Generation of S-meter voltage.
Q61	S-meter amplifier
Q62	Switching	Prevents S-meter from over-reading when power is turned ON.
Q63	Switching	Generates HF voltage. TS-680S only
Q64	Switching	Generates 50MHz band voltage. TS-680S only
Q65,66	Switching	Sets AGC time constant in mode other than FM mode.
Q67	Switching	Invalidates changeover of FAST/SLOW of AGC in FM mode.
Q68	Generation of ALC meter voltage
Q69	ALC meter amplifier
Q70	RF amplifier	28MHz band. TS-680S only
Q71	Buffer	28MHz band. TS-680S only
Q72	RF amplifier	50MHz band. TS-680S only
Q73	Buffer	50MHz band. TS-680S only
Q74	TX AF amplifier
Q75	Switching	Shunt of FMM in RX mode.
Q76	8V line switching	Turned ON in TOC (Tone transmission) mode.
Q77	Switching	Generates RXB. Set to “L” in TX mode.
Q78	HET amplifier	39.6MHz.
Q79,80	TX 2nd mixer	40.055MHz (39.6MHz in FM mode) → Transmission frequency.
Q81	RF amplifier
Q82	8V line switching	Turned ON in FM/TX mode.
Q83,85	13.8V line switching	Turned ON in 50MHz band. TS-680S only
Q84	Switching	Connects KEY line in CW mode.
Q86	TX IF amplifier	455kHz.
Q87	8V line switching	Turned ON in TX mode. Generates KEYING timing.
Q88	8V line switching	Turned ON in FM, CW and TX mode.
Q89	AF amplifier	Output to RX packet terminal.
Q90,91	Switching	Generates SS and CSS.
Q92	Switching	Set to “L” in power-down mode.
Q93	Switching	Set to “L” in mode other than power-down mode.
Q94	Switching	Set to “L” in HF mode. TS-680S only
Q95	Switching	Set to “L” in 50MHz mode. TS-680S only
Q96	Switching	Set to “L” in SSB and FM mode.
Q97	Switching	Generates squelch signal for packet.
Q98	Switching	Generates NFT.
Q99	Switching	Connects SEM line in CW mode.
D1~3	Switching	Changeover of BPF.
D5,6,9,10	Protection from lightning surge
D7,8,11~20	Switching	Changeover of BPF.
D21,22	Switching	Changeover of BPF. TS-680S only
D23	Absorption of surge voltage of relay	For attenuator relay.
D24	Prevention of reverse current	Information on 28F 28MHz band and 50F 50MHz band. TS-680S only
D25	Absorption of surge voltage of relay	For RF AMP changeover relay. TS-680S only
D26~29	Prevention of reverse current	Decodes band information.
D30	Voltage shift
D31	Prevention of reverse current	Decodes band information. TS-680S only
D33	Prevention of reverse current
D34,35	Change of VCO frequency	0.5~10.5MHz.
D36,37	Change of VCO frequency	10.5~21.5MHz.
D38	VCO switching	For 10.5~21.5MHz.
D39,40	Change of VCO frequency	21.5~30.0MHz.
D41	VCO switching	For 21.5~30.0MHz.
D42,43	Change of VCO frequency	50.0~54.0MHz. TS-680S only
D44	VCO switching	For 50.0~54.0MHz. TS-680S only
D45	Switching	For TX mixer of VCO output.
D46	Switching	For RX mixer of VCO output.
D47	Attenuator	For CAR level.
D48	Prevention of reverse current	RXB+SSB.
D49	Prevention of reverse current
D50,53	Switching	Receiving 1st IF MCF circuit.
D51,52	Switching	Transmission 2nd IF MCF circuit.
D54	Switching	Receiving 2nd IF circuit.
D55	Switching	Transmission 1st IF circuit.
D56,57,60~63	Switching	Selects 455kHz filter.
D58,59	Prevention of reverse current	SSB+CW wide.
D64	Switching	Transmission 1st IF circuit.
D65	Switching	Receiving 2nd IF circuit.
D66	Switching	RB line.
D67	Switching	SS line.
D68	Prevention of reverse current	SSB+AMB.
D69	Prevention of reverse current	SSB+CWB.
D70	Prevention of reverse current	MUT+RB.
D71	Noise detection	FM squelch circuit.
D72	Switching	FM 2nd IF circuit.
D73,74	AGC detection
D75	AM detection
D76	Prevention of reverse current	TXB.
D77	Prevention of reverse current	FMB+CWB.
D78	Temperature compensation	S-meter circuit.
D79	Prevention of reverse current	50W+PPD.
D80	Prevention of reverse current	PD+FMB.
D81	Prevention of reverse current	AMB+CWB.
D82	Prevention of reverse current	VSF.
D83	Prevention of reverse current	ALC.
D85	Prevention of reverse current	Protection.
D86	Noise detection	NB1.
D87	Noise detection	NB2.
D88	Voltage shift	SBK.
D89	Prevention of reverse current	CWB+FMB.
D90	Absorption of surge voltage of relay	For remote control relay.
D91,92	Voltage shift	Outside ALC.
D93	Voltage shift	For DELAY TIME module VCC.
D95	Prevention of reverse current
D96	Switching	HET amplifier input.
D97,98	Prevention of reverse current	RXB+NFT+ALC.
D99	Switching	Receiving HET output.
D100	Switching	Transmission HET output.
D101,102	Switching	FM transmission IF output.
D103~106	Switching	Changeover of transmission BPF.
D107	Prevention of reverse current	RXB+NFT.
D108	Prevention of reverse current	CWB.
D109,110	Switching	CAR TIF input circuit.
D111	Temperature compensation	TIF amplifier.
D112	Prevention of reverse current	RB.
D113	Prevention of reverse current	Power supply circuit for keying.
D114	Prevention of reverse current	KEY.
D115	Prevention of reverse current	PC1.
D116	Stabilization of voltage	For ALC amplifier.
D117	Prevention of reverse current	Unbalancing circuit of AM carrier.
D118	VCO switching	For 0.5~10.5MHz.
D119	Prevention of reverse current	SSB+FMB.
D120	Prevention of reverse current	For IC8 VCC.
D122	Switching	CAR TIF input circuit.
D123	Prevention of reverse current	CWB.
D124	Switching	FM transmission IF output.
D125	Voltage shift	Protection circuit.
D126	Switching	Transmission output in mode other than FM mode.
D501	Isolator	CWB.
D502	Isolator	VOX line.
D503	Voltage shift	VOX line.

What are the functions of the components in the SIDE TONE UNIT (X59-1060-00)?

Component	Use/Function	Operation/Condition/Compatibility
Q1	SIDE TONE oscillation	800Hz.
D1	Switching	Turned ON when KEY DOWN.
D2	Prevention of reverse current
D3	Temperature compensation

What are the functions of the components in the VOX UNIT (X59-1080-00)?

Component	Use/Function	Operation/Condition/Compatibility
IC1 (1/2)	Comparison of VOX level
IC1 (2/2)	Comparison of ANTI VOX level
IC2	NOR circuit (RS flip-flop)
Q1	Switching transistor	Q1 is ON when IC2/11pin is “H”
D1,2	Prevention of reverse current

What are the functions of the components in the FM MIC AMP UNIT (X59-3000-02)?

Component	Use/Function	Operation/Condition/Compatibility
IC1 (1/2)	Low-pass filter	1,2: Output
IC1 (2/2)	Limiting amplifier	6: Input 7: Output
Q1	SUB TONE

What are the functions of the components in the TRX UNIT (X59-3340-00)?

Component	Use/Function	Operation/Condition/Compatibility
Q1~5	Switching transistor	Q3,5 are ON in receiving mode, and Q1,2,4 are ON in transmission mode.
D1,2	Switching

What are the functions of the components in the NB2 UNIT (X59-3350-00)?

Component	Use/Function	Operation/Condition/Compatibility
IC1	One-shot multivibrator	Synchronized to pulse, with width of 1/4,4/4: 5mS and 2/4,3/4: 40mS.
Q1	Switching transistor	Turned ON when pulse is 15mS.
Q2	Switching transistor	Turned OFF when pulse is 40mS.

What are the functions of the components in the DELAY TIME UNIT (X59-3360-00)?

Component	Use/Function	Operation/Condition/Compatibility
IC1	One-shot multivibrator
Q1,2,6	Switching transistor	Turned ON when CW KEY DOWN.
Q3~5,7	Switching transistor	Turned OFF when CW KEY DOWN.
D1	Prevention of reverse current

What are the functions of the components in the FAN UNIT (X59-3370-00)?

Component	Use/Function	Operation/Condition/Compatibility
IC1	Temperature detection	1/2: Power down 2/2: Fan motor operation
Q1	Switching transistor

What accessories are included with the TS-140S/680S?

The TS-140S (K, M models) comes with a Microphone (T91-0352-15).

All TS-140S and TS-680S models include:

7P DIN plug (E07-0751-05)

DC power cord ass’y (E30-2065-05)

Connecting wire (CAL) (E31-2154-05)

13P plug (E07-1351-05)

Fuse(20A) (F05-2036-05)

How is the RX section signal level measured?

For the RX section measurements:

Frequency: 14.200MHz

Input: 0dBµ

AF output: 0.63V/8Ω

Note 1: The SSG (Standard Signal Generator) signal of 14.200MHz/0dBµ is input from the ANT terminal, and the audio output of 0.63V/8Ω is obtained by adjusting the AF GAIN VR.

Note 2: The SSG signal levels at various points necessary to obtain the same audio output at this time with the AF GAIN VR at a fixed position are plotted. In FM mode, this signal level is used to obtain the same value as the S/N at time when 0dBµ is input.

Note 3: The SSG output is measured through a capacitor of 0.01µF.

What are the measurement conditions for the TX section signal levels?

For the TX section measurements:

Frequency: 14.200MHz

Note 1: The high-frequency part is measured with the RF V.M (RF Voltmeter) in the CW mode.

Note 2: The low-frequency part is measured with the AF V.M (AF Voltmeter) in the USB mode. The audio input voltage in the USB mode is the input for obtaining 1kHz single tone which reads almost the maximum value in the ALC zone, and that in the FM mode is the input for realizing the standard modulation (±3kHz DEV.).

Note 3: MIC VR is set to the maximum point.

What are the general preparation steps before performing adjustments?

Unless otherwise specified, set the controls as follows:

Control	Setting	Control	Setting
POWER	ON	PROC	OFF
BAND	14	ALC/PWR	PWR
AF	MIN	ATT	OFF
SQL	MIN	AGC	SLOW
IF SHIFT	CENTER	VOX (TS-140S)	OFF
CW	OFF	RF AMP (TS-680S)	OFF
PWR	MIN	1MHz	OFF
MIC	MIN	RIT	OFF
RF GAIN	MAX	NB1	OFF
NB LEVEL	MIN	NB2	OFF
F. LOCK	OFF	VFO A/B	A
SEND/REC	REC	SPLIT	OFF

How do I perform a reset?

To perform a reset:

1. Set the power SW ON, while depressing the A=B key.

After reset, the device should be at: A VFO, 14.000.0, MODE: USB.

How are voltages checked?

The following table outlines voltage checks:

Item	Condition	Test-equipment	Measurement Unit	Terminal	Parts	Adjustment Method	Specifications/Remarks
1. Voltage	1)	DC V.M	Signal	8-4			13.8V	13.1 ~ 14.3V
				8V (Silk)			7.7V	7.2 ~ 8.0V
	2) SEND/REC SW: SEND			TXB(Silk)			7.5V	7.0 ~ 8.0V
	3) SEND/REC SW: REC			RXB(Silk)			7.5V	7.0 ~ 8.0V
	4) MODE: FM			FMB(Silk)				6.5 ~ 8.0V
	5) MODE: AM			AMB(Silk)				6.5 ~ 8.0V
	6) MODE: CWN			CWN (Silk)				6.5 ~ 8.0V
	7) MODE: CW			CWB(Silk)				6.5 ~ 8.0V
	8) MODE: USB			SSB(Silk)				6.5 ~ 8.0V
	9)		Ctrl	12-1			5V	4.5 ~ 5.5V
2. RFG voltage	1) RF GAIN VR: MAX		Signal	RXB (Silk)	Signal	VR22	3.1V	3.05 ~ 3.15V

How are the PLL adjustments performed?

The following table outlines PLL adjustments:

Item	Condition	Test-equipment	Measurement Unit	Terminal	Unit	Parts	Adjustment Method	Specifications/Remarks
1. Reference frequency	1)	f. counter	Ctrl	TP5 (R77)	Ctrl	TC1	36.000000MHz	±10Hz
2. VCO-4	1)	DC V.M		TP8 (L53)		L54	5.0V	4.8 ~ 5.2V
3. VCO-3	1) FREQ.: 14.000.00 MODE: AM			TP1 (L2)		L3	2.4V	2.3 ~ 2.5V
	2) FREQ.: 14.000.00 MODE: USB IF SHIFT VR: Center Control unit VR4: CW MAX	f. counter		1-1		VR2	455.700kHz	±5Hz
	3) IF SHIFT VR: CW MAX						Check	457.250kHz or more.
	4) IF SHIFT VR: CCW MAX						Check	454.125kHz or less.
	5) IF SHIFT VR: Center Control unit VR4: Center
4. VCO-2	1) FREQ.: 13.999.90 MODE: AM	DC V.M		TP2 (L11)		L12	1.2V	1.1 ~ 1.3V
	2) FREQ.: 14.000.00 MODE: AM					Check	3.1 ~ 3.7V
5. VCO-2 BPF	1) FREQ.: 14.025.00 MODE: AM	Oscilloscope		TP3 (R51)		L17~L19	Repeat 2~3 times. Level MAX.	1.4V/p-p or more. (Ref. level: 1.75V/p-p)
				TP4 (W2)		L28, L29		0.3V/p-p or more. (Ref. level: 0.4V/p-p)
				TP6 (R100)		L30~L32		120mV/p-p or more. (Ref. level: 150mV/p-p)
	2) FREQ.: 10.025.00 MODE: AM					L32, L42~L44		80mV/p-p or more. (Ref. level: 100mV/p-p)
	3) FREQ.: 24.525.00 MODE: AM					L39~L41
6. VCO-1	1) FREQ.: 59.999.90 MODE: AM TS-680S only.	DC V.M	Signal	6-2	Signal	L74	2.0V	1.9 ~ 2.1V
	2) FREQ.: 45.000.00 MODE: AM TS-680S only.						Check	5.0 ~ 6.0V
	3) FREQ.: 34.999.90 MODE: AM					L72	6.0V	5.9 ~ 6.1V
	4) FREQ.: 21.500.00 MODE: AM						Check	2.0 ~ 3.0V
	5) FREQ.: 21.499.90 MODE: AM					L70	2.0V	1.9 ~ 2.1V
	6) FREQ.: 10.500.00 MODE: AM						Check	5.0 ~ 6.0V
	7) FREQ.: 10.499.90 MODE: AM					L68	2.0V	1.9 ~ 2.1V
	8) FREQ.: 50.00						Check	5.5 ~ 6.5V

How are the RX adjustments performed?

The following table outlines RX adjustments:

Item	Condition	Test-equipment	Measurement Unit	Terminal	Parts	Adjustment Method
1. RX AMP.	1) FREQ.: 14.175.00 MODE: USB SSG output: Optional output from 10dBµ to -6dBµ	SSG AF V.M Oscilloscope 8Ω dummy load	EXT.SP	L52~L55, L57,59, L60,64, L65,89	Adjust from L52 to L89.	MAX. AF output.
	2) SSG output: -6dBµ			L52~L55	Repeat 2 – 3 times.	MAX. AF output.
2. FM AMP.	1) FREQ.: 28.800.00 MODE: FM SSG output: 30dBµ (MOD: 1kHz, DEV: ±3kHz)			L86	MAX. AF output.	No distortion in AF waveform.
3. 1st MIX balance	1) FREQ.: 100.00 MODE: USB SSG output: OFF			VR1	MIN. AF noise output.
4. 2nd MIX balance	1) FREQ.: 14.175.00 MODE: USB SSG output: OFF			VR2	MAX. AF noise output.
5-1. IF trap	1) FREQ.: 29MHz MODE: USB SSG output: 60dBµ~80dBµ SSG FREQ.: 40.055MHz			L1,46	1) MIN. AF output at 60dBµ of SSG output. 2) Readjust to MIN. AF output at 80dBµ of SSG output.	50dB or more.
5-2. IF trap TS-140S W type only	1) FREQ.: 11.800.00 MODE: USB SSG output: 0dB			TC2	MIN. AF output.
	2) FREQ.: 15.200.00			TC1	MIN. AF output. Repeat 2 – 3 times.
6. RF AMP. TS-680S only.	1) FREQ.: 28.800.00 MODE: USB SSG output: -10dBµ RF AMP SW: ON			L37	MAX. AF output.
	2) FREQ.: 50.500.00
	3) RF AMP SW: OFF			L42
7. S-meter	1) FREQ.: 14.175.00 MODE: USB AGC SW: FAST
	S0 point SSG output: OFF			VR26	Set to starting point. (Meter zero)
	S1 SSG output: 6dBµ			VR3	S-meter “1”.
	S9 SSG output: 32dBµ			R10	S-meter “9”.
	S1 check SSG output: 6dBµ				Check	6dBµ ± 3dBµ
	VHF S-meter (TS-680S only) FREQ.: 50.500.00 MODE: USB SSG output: 32dBµ			VR11	S-meter “9”.
	FM meter FREQ.: 28.800.00 MODE: FM SSG output: 30dBµ (MOD: OFF) RF AMP SW: OFF (TS-680S only)			VR12	S-meter “9 + 20”.

How are the RIT and NB adjustments performed?

The following table outlines RIT and NB adjustments:

Item	Condition	Test-equipment	Measurement Unit	Terminal	Parts	Adjustment Method	Specifications/Remarks
8. RIT	1) Set the Power SW ON, while depressing the CLEAR key.		Display		Check	Display of 10Hz is displayed.
	2) FREQ.: 14.000.00 MODE: USB RIT VR: Center RIT SW: ON			Ctrl	VR1	Set display to MAIN 14.000.00 RIT 0.0
	3) RIT VR: CW MAX					Check	Display MAIN: 14.001.27 or more RIT: 1.2 or more.
	4) RIT VR: CCW MAX					Check	Display MAIN: 13.998.72 or less. RIT: -1.2 or less.
	5) RIT VR: Center RIT SW: OFF
9. NB	1) FREQ.: 14.200.00 MODE: USB SSG output: 30dBµ NB1 SW: ON	SSG DC V.M	Signal	L83	L84,85	MIN. voltage.
	2) Connect the noise generator to the ANT terminal.	Noise generator	S-meter			Check	The same effect as NB1 is obtained.
	3) NB1 SW: OFF NB2 SW: ON
	4) Disconnect the noise generator from the ANT terminal. NB2 SW: OFF

How is the TX AMP adjusted?

For TX AMP adjustment:

Item	Condition	Test-equipment	Measurement Unit	Terminal	Parts	Adjustment Method	Specifications/Remarks
1. TX AMP	1) FREQ.: 50.200.00 (TS-680S) FREQ.: 21.200.00 (TS-140S) MODE: CW Signal unit VR19: Center CWSW: FULL SEND/REC SW: SEND	Spectrum analyzer	Signal	DRV	L89,95 L113 VR20	Adjust CAR VR to level not to be saturated, and MAX. output.	MAX. output. (Ref. level: -13dBm or more)
	2) SEND/REC SW: REC

How is the 455kHz spurious level adjusted?

For 455kHz spurious adjustment:

Item	Condition	Test-equipment	Measurement Unit	Terminal	Parts	Adjustment Method	Specifications/Remarks
2. 455kHz spurious	1) FREQ.: 50.200.00 (TS-680S) FREQ.: 21.200.00 (TS-140S) SEND/REC SW: SEND				L53	MIN. Spurious level of 455kHz.
	2) After adjustment, reconnect DRV. SEND/REC SW: REC

How is the base current adjusted?

For base current adjustment:

Item	Condition	Test-equipment	Measurement Unit	Terminal	Parts	Adjustment Method	Specifications/Remarks
3. Base current	1) FREQ. 14.200.00 MODE: USB MIC VR: MIN PWR VR: MIN Final unit VR1, 2: CCW MAX SEND/REC SW: SEND	Ammeter	DC cord	Final	VR1	1) Record current before adjusting VR1 and VR2. 2) Adjust VR1 for an increase for +250mA.	250mA ± 50mA. (Total current: 1.7 ~ 1.8A)
					VR2	Adjust VR2 so that the current is increase of above item 2) +250mA.	500mA ± 50mA. (Total current: 1.95 ~ 2.05A)
	2) SEND/REC SW: REC

How is the power output adjusted?

For power output adjustment:

Item	Condition	Test-equipment	Measurement Unit	Terminal	Parts	Adjustment Method	Specifications/Remarks
4. Power	CW 1) FREQ.: 14.200.00 MODE: CW PWR VR: MAX (HI/LO) Signal unit S2: HI SEND/REC SW: SEND	Power meter	Rear	ANT	VR17	95W	±5W
	2) SEND/REC SW: REC
	FM 3) FREQ.: 29.700.00 MODE: FM Filter unit VR1: Center PWR VR: MAX Signal unit S2: HI SEND/REC SW: SEND				VR14	50W
	4) SEND/REC SW: REC
	SSB 5) FREQ.: 14.200.00 MODE: USB PWR VR: MAX MIC VR: Center Display unit VR5: CCW MAX MIC input: 1kHz, 5mV SEND/REC SW: SEND				VR13	100W	±5W
	6) SEND/REC SW: REC
	50MHz (TS-680S only) 7) FREQ.: 51.200.00 MODE: CW PWR VR: Center Signal unit VR15: CW MAX SEND/REC SW: SEND		Filter		TC1	Adjust PWR VR to set output about 10W. MAX. output at TC1.
	8) PWR VR: MAX		Signal		VR15	11W	±0.5W
	9) SEND/REC SW: REC
	MIN. POWER 10) FREQ.: 51.200.00 (TS-680S) FREQ.: 29.700.00 (TS-140S) MODE: FM PWR VR: MIN SEND/REC SW: SEND				VR18	1W (TS-680S) 5W (TS-140S)
	11) SEND/REC SW: REC PWR VR: MAX

How is the NULL adjustment performed?

For NULL adjustment:

Item	Condition	Test-equipment	Measurement Unit	Terminal	Parts	Adjustment Method	Specifications/Remarks
5. NULL	1) FREQ.: 3.700.00 MODE: CW SEND/REC SW: SEND	Power meter DC V.M	Signal	VSR ((13)-2)	TC2	MIN
	2) SEND/REC SW: REC

How is the protection circuit adjusted?

For protection circuit adjustment:

Item	Condition	Test-equipment	Measurement Unit	Terminal	Parts	Adjustment Method	Specifications/Remarks
6. Protection	1) FREQ: 14.200.00 MODE: CW SEND/REC SW: SEND	Power meter 150Ω dummy load	Rear	ANT	VR16	30W
	2) SEND/REC SW: REC

How is the power meter adjusted?

For power meter adjustment:

Item	Condition	Test-equipment	Measurement Unit	Terminal	Parts	Adjustment Method	Specifications/Remarks
7. Power meter	1) FREQ.: 14.200.00 MODE: CW ALC/PWR SW: PWR SEND/REC SW: SEND	Power meter	Rear	ANT	VR25	Adjust to 90W by CAR VR.	RF meter: 90W
	2) SEND/REC SW: REC

How is the ALC meter adjusted?

For ALC meter adjustment:

Item	Condition	Test-equipment	Measurement Unit	Terminal	Parts	Adjustment Method
8. ALC meter	1) FREQ.: 14.200.00 MODE: USB PWR VR: MAX MIC VR: MAX ALC/PWR SW: ALC Filter unit VR5: Center	Power meter AG AF V.M	ALC meter	Signal
	S0 point 2) SEND/REC SW: SEND				VR8	Adjust to the “0” of ALC meter reading.
	3) SEND/REC SW: REC					Adjust to the “0” of ALC meter reading by MIC VR.
	Start point 4) MIC input: 1kHz, 1.5mV SEND/REC SW: SEND
	5) SEND/REC SW: REC
	MAX 6) MIC input: 1kHz, 3mV SEND/REC SW: SEND				VR9	Adjust ALC meter MAX. within ALC zone.
	7) ALC/PWR SW: PWR SEND/REC SW: REC

How are spurious emissions adjusted for TS-680S (50MHz and 21MHz)?

For 50MHz spurious adjustment (TS-680S only):

Item	Condition	Test-equipment	Measurement Unit	Terminal	Parts	Adjustment Method	Specifications/Remarks
9-1. Spurious TS-680S only.	50MHz 1) FREQ.: 50.200.00 MODE: CW PWR VR: MAX SEND/REC SW: SEND	Power meter Spectrum analyzer	Rear	ANT	VR19	Adjust as shown at right. (MIN. spurious of A at 40.055MHz and B at 59.944MHz.)	(60dB or less)
	2) SEND/REC SW: REC

For 21MHz spurious adjustment (TS-680S only):

Item	Condition	Test-equipment	Measurement Unit	Terminal	Parts	Adjustment Method	Specifications/Remarks
9-1. Spurious TS-680S only.	21MHz 3) FREQ.: 21.200.00 SEND/REC SW: SEND				L97	Adjust as shown at right. (MIN. spurious of C.)	(45dB or less)
	2) SEND/REC SW: REC

How are spurious emissions adjusted for TS-140S only (21MHz)?

For 21MHz spurious adjustment (TS-140S only):

Item	Condition	Test-equipment	Measurement Unit	Terminal	Parts	Adjustment Method	Specifications/Remarks
9-2. Spurious TS-140S only.	1) FREQ.: 21.200.00 MODE: CW PWR VR: MAX SEND/REC SW: SEND				VR19 L97	1) Adjust L97 to MIN. spurious of A (at 2.5MHz). 2) Adjust VR19 to MIN. spurious of B.	(45dB or less)
	2) SEND/REC SW: REC

How is CAR (carrier) suppression adjusted?

For CAR suppression adjustment:

Item	Condition	Test-equipment	Measurement Unit	Terminal	Parts	Adjustment Method	Specifications/Remarks
10. CAR suppression	1) FREQ.: 14.200.00 MODE: USB or LSB MIC VR: MIN SEND/REC SW: SEND	Power meter Oscilloscope or Spectrum analyzer	Rear	ANT	VR4 VR5	MIN. Adjust for no difference between USB and LSB.	-40dB or less.
	2) SEND/REC SW: REC

How is the TX frequency response adjusted?

For TX frequency response adjustment:

Item	Condition	Test-equipment	Measurement Unit	Terminal	Parts	Adjustment Method	Specifications/Remarks
11. TX frequency response	1) FREQ.: 14.200.00 MODE: USB or LSB AG output: 2 tone, 5mV (300Hz from AG1, 2600Hz from AG2, combined via 10kΩ resistors to MIC LINE) SEND/REC SW: SEND MIC VR: ALC meter “0”	Power meter Oscilloscope or Spectrum analyzer AG		Ctrl	VR3 (LSB) VR4 (USB)	Adjust as shown at right. (Observe OK, NG waveforms for proper adjustment)
	2) SEND/REC SW: REC

How is the processor adjusted?

For processor adjustment:

Item	Condition	Test-equipment	Adjustment Method	Specifications/Remarks
12. Processor	1) FREQ.: 14.200.00 MODE: USB PROC SW: ON ALC/PWR SW: ALC AG output: 1kHz, 10mV SEND/REC SW: SEND	Power meter AG AF V.M	Adjust for ALC zone MAX. with MIC GAIN VR.
	2) AG output: 20dB down		Check	The meter deflection is within the ALC zone.
	3) SEND/REC SW: REC

How is FM deviation adjusted?

For FM deviation adjustment:

Item	Condition	Test-equipment	Terminal	Parts	Adjustment Method	Specifications/Remarks
13. FM DEV	1) FREQ.: 28.700.00 MODE: FM MIC input: 1kHz, 30mV SEND/REC SW: SEND	Power meter AG AF V.M	Signal	VR24	4.6kHz	±0.1kHz
	2) MIC input: 1kHz, 3mV	Linear detector		VR6	3kHz	±0.1kHz
	3) SEND/REC SW: REC

How is the side tone monitor level adjusted?

For side tone monitor level adjustment:

Item	Condition	Test-equipment	Measurement Unit	Terminal	Parts	Adjustment Method	Specifications/Remarks
14. Side tone monitor level	1) FREQ.: 14.200.00 MODE: CW AF VR: Center Signal unit VR7: CW MAX CW SW: SEMI Connect the KEY to the KEY jack.	Power meter AF V.M Oscilloscope 8Ω Head	EXT.SP		VR21	0.25V/8Ω	±0.05V
	2) Disconnect the KEY from the KEY jack. CW SW: OFF

How is the beep sound level checked/adjusted?

For beep sound level:

Item	Condition	Test-equipment	Measurement Unit	Terminal	Parts	Adjustment Method	Specifications/Remarks
15. Beep sound	1) Depress the LSB/USB key continuously.				VR23	Check	200 ~ 400mV.

What are the electrical characteristics of the YK-455C-1 CW Filter?

Item	Rating
Nominal center frequency (fo)	455kHz
Center frequency declination	Within fo ± 0.1kHz at 6dB
6dB pass bandwidth	fo ± 0.25kHz or more
60dB attenuation bandwidth	fo ± 1.1kHz or less
Ripple	3dB or less at within fo ± 0.2kHz
Insertion loss	8dB or less
Spurious attenuation	70dB or more at within fo ± 60kHz
I/O terminating impedance	2kΩ ± 5%

What are the specifications of the TU-8 Tone Unit?

Frequency range	38CH in 67.0 – 250.3Hz and 1750Hz, 1800Hz
Frequency Deviation	Within ±0.5%
Max. Output Power	2.0Vrms ±5% at 1800Hz/1.5kΩ
Operating temperature	-20°C to +60°C
Power Supply Voltage	8V±5%
Semi-conductors	ICs: 2 Diode: 1
Weight	Approx. 10 grams
Dimensions	45 mm W 22 mm D 8 mm H (without cushion, etc.)

How is the TU-8 Tone Unit configured?

The TU-8 is a tone unit designed for the repeater operation of the TS-140S/680S.

Outline:

1. A six position DIP switch (Fig. 1) has been provided to allow selection of the desired tone frequency; 40 different frequencies are available (See Table 1.). Use the DIP switch and Table 1 to select the desired tone frequency.

Fig. 1 shows an example for 88.5Hz switch position where switches 1, 2, 3, 5, 6 are OFF (down) and switch 4 is ON (up).

Table 1 Program (DIP Switch Settings for Tone Frequency)

(1: ON 0: OFF)

Freq. (Hz)	P1	P2	P3	P4	P5	Freq. (Hz)	P1	P2	P3	P4	P5	P6
67.0	1	0	0	0	0	136.5	1	0	1	0	1	0
71.9	0	1	0	0	0	141.3	0	1	1	0	1	0
74.4	1	1	0	0	0	146.2	1	1	1	0	1	0
77.0	0	0	1	0	0	151.4	0	0	0	1	1	0
79.7	1	0	1	0	0	156.7	1	0	0	1	1	0
82.5	0	1	1	0	0	162.2	0	1	0	1	1	0
85.4	1	1	1	0	0	167.9	1	1	0	1	1	0
88.5	0	0	0	1	0	173.8	0	0	1	1	1	0
91.5	1	0	0	1	0	179.9	1	0	1	1	1	0
94.8	0	1	0	1	0	186.2	0	1	1	1	1	0
97.4	1	1	0	1	0	192.8	1	1	1	1	1	0
100.0	0	0	1	1	0	203.5	0	0	0	0	0	1
103.5	1	0	1	1	0	210.7	1	0	0	0	0	1
107.2	0	1	1	1	0	218.1	0	1	0	0	0	1
110.9	1	1	1	1	0	225.7	1	1	0	0	0	1
114.8	0	0	0	0	1	233.6	0	0	1	0	0	1
118.8	1	0	0	0	1	241.8	1	0	1	0	0	1
123.0	0	1	0	0	1	250.3	0	1	1	0	0	1
127.3	1	1	0	0	1	1750.0	1	1	1	1	0	1
131.8	0	0	1	0	1	1800.0	0	0	0	0	1	1

How is the TU-8 Tone Unit adjusted?

Deviation adjustment:

The TU-8 has been preset at factory for ±600Hz. The deviation is adjusted by with VR1 to Max. ±2kHz with the deviation potentiometer full clockwise when the TU-8 is installed on the TS-140S/680S.

Tone-burst or continuous tone selection:

A switch (S1) is provided to allow selection of either the tone-burst or continuous tone mode. The burst duration can be adjusted by with VR2.

*1 Tone-burst mode (Switch S1 to B – IC1 side): A tone will be generated for a brief period at the beginning of each transmission.

*2 Continuous-tone mode (Switch S1 to C – IC2 side): A tone will be generated as long as the PTT switch is depressed. Since the tone is adjusted for a sub-audible level, this should not interfere with normal communications.

Burst time adjustment (Fig. 3):

The burst time can be adjusted using VR2 according to Table 2.

Table 2 (Burst Time Adjustment via VR2)

VR2 Position (Clock Face)	TIME
9:00	Approx. 0.5 sec.
12:00	Approx. 2 sec.
13:30	Approx. 3.5 sec.
15:00	Continuous-tone

What are the specifications of the IF-10C Interface Kit?

Power requirement	DC 5.0V (4.5 ~ 5.5V)
Current drain	100mA
Interface signal level
Output signal	“L” level: 0 ~ 0.4V “H” level: 2.4 ~ 5V
Input signal	“L” level: 0 ~ 0.8V “H” level: 2 ~ 5V
Operating temperature	-10°C ~ +50°C

What are the general specifications for the TS-140S/680S?

Model	TS-140S	TS-680S
Mode	J3E (LSB, USB), A1A (CW), A3E (AM), F3E (FM)
Antenna impedance	50 ohms
Power requirement	12 to 16 VDC (13.8 VDC reference)
Grounding	Negative
Current drain	Receive mode with no input signal	1.5 A
Current drain	Transmit mode	20 A
Operating temperature	-10 to +50°C (+14 to +122°F)
Frequency stability	Less than ± 10 PPM
Frequency accuracy	Less than ± 10 PPM
Dimensions (W x H x D) (Projections included)	281 x 107 x 305 mm (11-1/16″ x 4-7/32″ x 12″)
Weight	6.1 kg (13.4 lbs)
Frequency range	160 m band	1.8 to 2.0 MHz	1.8 to 2.0 MHz
	80 m band	3.5 to 4.0 MHz	3.5 to 4.0 MHz
	40 m band	7.0 to 7.3 MHz	7.0 to 7.3 MHz
	30 m band	10.1 to 10.15 MHz	10.1 to 10.15 MHz
	20 m band	14.0 to 14.35 MHz	14.0 to 14.35 MHz
	17 m band	18.068 to 18.168 MHz	18.068 to 18.168 MHz
	15 m band	21.0 to 21.45 MHz	21.0 to 21.45 MHz
	12 m band	24.89 to 24.99 MHz	24.89 to 24.99 MHz
	10 m band	28.0 to 29.7 MHz	28.0 to 29.7 MHz
	6 m band		50.0 to 54.0 MHz

What are the transmitter specifications for the TS-140S/680S?

Model	TS-140S	TS-680S
Output power	160 m band – SSB	110 W *1	100 W *1
	160 m band – CW		100 W *1
	160 m band – AM		40 W *1
	15 m band – SSB, CW		100 W
	15 m band – AM		40 W
	12 m band – SSB	100 W	95 W
	12 m band – CW		95 W
	10 m band – FM		50 W
	10 m band – AM		40 W
	6 m band – SSB, CW, FM		10 W
	6 m band – AM		4 W
Modulation	LSB, USB	Balanced modulation
	FM	Reactance modulation
	AM	Low level modulation
Spurious radiation (CW)	1.9 MHz to 29.7 MHz	Less than -40 dB
Spurious radiation (CW)	50 MHz to 54 MHz		Less than -60 dB
Carrier suppression	More than 40 dB (with 1.5 kHz reference)
Unwanted sideband suppression	More than 50 dB (with 1.5 kHz reference)
Maximum frequency deviation (FM)	±5 kHz
Frequency response (-6 dB)	400 to 2600 Hz
Microphone impedance	500 ohms to 50 kΩ

*1: The output power on the 160 m band is limited to 10 W depending on local regulations.

What are the receiver specifications for the TS-140S/680S?

Model	TS-140S	TS-680S
Circuitry	Double conversion superheterodyne
Frequency range	500 kHz to 30 MHz	500 kHz to 30 MHz
Frequency range			50 MHz to 54 MHz
Intermediate frequency	1st: 40.055 MHz, 2nd: 455 kHz
Sensitivity – LSB, USB, CW (at 10 dB S+N/N)	500 kHz to 1.62 MHz	Less than 3.98 µV
	1.62 MHz to 21.5 MHz	Less than 0.25 µV
	21.5 MHz to 30 MHz	Less than 0.25 µV	Less than 0.18 µV *2
	50 MHz to 54 MHz		Less than 0.16 µV *2
Sensitivity – AM (at 10 dB S+N/N)	500 kHz to 1.62 MHz	Less than 39.8 µV
	1.62 MHz to 21.5 MHz	Less than 2.5 µV
	21.5 MHz to 30 MHz	Less than 2.5 µV	Less than 1.78 µV *2
	50 MHz to 54 MHz		Less than 1.58 µV *2
Sensitivity – FM (at 12 dB SINAD)	21.5 MHz to 30 MHz	Less than 0.35 µV	Less than 0.18 µV *2
Sensitivity – FM (at 12 dB SINAD)	50 MHz to 54 MHz		Less than 0.18 µV *2
Selectivity	LSB, USB, CW	-6 dB: 2.2 kHz, -60 dB: 4.4 kHz
	AM	-6 dB: 6 kHz, -50 dB: 18 kHz
	FM	-6 dB: 12 kHz, -50 dB: 25 kHz
Image ratio	More than 50 dB
1st IF rejection	More than 50 dB
IF SHIFT variable range	More than ±1.2 kHz
RIT variable range	10 Hz STEP	More than ±1.2 kHz
RIT variable range	20 Hz STEP	More than ±2.5 kHz
Squelch sensitivity (FM)	Less than 0.32 µV
Output	1.5 W across 8 ohms load (10% distortion)
Output load impedance	8 – 16 ohms

Notes:

*2: This is valuable when the RF AMP switch is turned ON.

What accessories are included with the TS-140S/680S?

Unpack your TS-140S/680S carefully. The following accessories should be supplied:

Dynamic microphone (Except European version)

DIN plug (7-pin)

DIN plug (13-pin)

DC power cable assembly

Calibration cable

Fuse (20A)

Instruction manual

After unpacking

Shipping container: Save the boxes and packing in the event your unit needs to be transported for remote operation, maintenance, or service.

What are the terminal functions for the SWITCH UNIT (X41-3030-XX)?

Connector No.	Terminal No.	Terminal Name	Terminal Function
CN1	1	GND	GND
	2	PPD	Packet power down
	3	RXB	RX power supply (+8V)
	4	PRS	Processor switch
	5	NC	Not connected
	6	MV3	Mic amp. output
CN2	1	SS	Standby switch
CN2	2	8V	+8V
CN3	1	SS	Standby switch
	2	PKS	Packet standby
	3	GND	GND
	4	PDK	Packet data input
CN4 (TS-140S)	1	GND	GND
CN4 (TS-140S)	2	VOX	VOX
CN5	1	MIC	Mic amp. input
	2	GND	GND
	3	8M	+8V (Mic)
	4	SS	Standby switch
CN6	1	AF1	AF GAIN GND
	2	AF2	AF GAIN volume
	3	AF3	AF GAIN input
	4	GND	GND
	5	FSQ	Squelch volume
	6	NC	Not connected
CN7	1	GND	GND
	2	RIT	RIT data
	3	RIB	RIT volume
	4	IFS	IF shift data
	5	IFB	IF shift volume
CN8	1	PH2	Phone output
	2	PH1	Phone input
	3	PH3	Phone GND

What are the terminal functions for the FILTER UNIT (X51-3040-XX)?

Connector No.	Terminal No.	Terminal Name	Terminal Function
CN1	1	RL	Relay power supply (TX 13V)
	2	RAT	RX antenna output
	3	GND	GND
CN2 (TS-680S)	1	50T	50MHz TX power supply
	2	14S	+14V
	3	14S	+14V
CN3	1	50F (NC)	50~54MHz (TS-680S) / Not connected (TS-140S)
	2	14F	7.5~14.5MHz
	3	28F	21.5~30MHz
	4	7F	4~7.5MHz
	5	21F	14.5~21.5MHz
	6	4F	2.5~4MHz
	7	2F	~ 2.5MHz
CN4	1	VSF	Forward wave voltage
	2	GND	GND
	3	VSR	Reflected wave voltage
	4	GND	GND
CN5	PO	Power input
CN5	GND	GND
CN6 (TS-680S)	50D	50MHz drive input
CN6 (TS-680S)	GND	GND
	ANT	Antenna
	GND	GND

What are the terminal functions for the CONTROL UNIT (X53-3100-XX)?

Connector No.	Terminal No.	Terminal Name	Terminal Function
CN1	1	CAR	Carrier output (455kHz)
CN1	2	GND	GND
CN2	1	5A	+5V (PLL)
	2	5B	+5V (Microprocessor)
	3	GND	GND
CN3	VCO	VCO input
CN3	GND	GND
CN4	1	GND	GND
	2	VCV	VCO control voltage
	3	8D	+8V (Active low-pass filter)
CN5	1	FMM	FM modulation signal input
CN5	2	GND	GND
CN6	HET	Heterodyne output
CN6	GND	GND
CN7	1	BZ	Beep sound output
CN7	2	NC	Not connected
CN8	1	5B	+5V (Interface)
	2	RDY	Ready
	3	CD	Control data
	4	CS	Chip select (IF-10C Option)
	5	RD	Read enable (IF-10C Option)
	6	WR	Write enable (IF-10C Option)
	7	GND	GND
CN9	1	RES	Reset
	2	D0	Microprocessor data bus 0 ~ 7 (IF-10C Option)
	3	D1
	4	D2
	5	D3
	6	D4
	7	D5
	8	D6
	9	D7
CN10	1	B4	Band data
	2	CNC	CW narrow mode data
	3	B3	Band data
	4	FMC	FM mode data
	5	B2	Band data
	6	AMC	AM mode data
	7	B1	Band data
	8	CWC	CW mode data
	9	B0	Band data
	10	SSC	SSB mode data
	11	CTX	Transmit timing control signal
	12	TOC	Sub-tone control signal
	13	RB	Receive timing control signal
	14	SBK	Blanking signal
	15	CKY	Keying control signal
	16	PD	Power down signal
	17	MU	Mic up data
	18	MUT	Mute signal
	19	MD	Mic down data
	20	VB1	VCO switching signal
	21	CSS	Standby control data
	22	VB2	VCO switching signal
	23	14A	+14V
	24	NC	Not connected
	25	8V	+8V
	26	GND	GND
CN11	1	CK4	Sub-encoder pulse input
	2	CK3	Sub-encoder pulse input
	3	5C	+5V (Display)
	4	L1	LED (1MHz)
	5	K0	Key scan input
	6	LF	LED (F. LOCK)
	7	K1	Key scan input
	8	LM	LED (M.SCR)
	9	K2	Key scan input
	10	XP	Display function signal
	11	K3	Key scan input
	12	SLH	Display serial data (Latch signal)
	13	S0	Key scan output
	14	SDA	Display serial data
	15	S1	Key scan output
	16	SCK	Display serial clock
	17	S2	Key scan output
	18	S3	Key scan output
CN12	1	GND	GND
	2	CK2	Main encoder pulse input
	3	CK1	Main encoder pulse input
	4	5B	+5V (Main encoder)
CN13	1	IFB	IF shift volume
	2	RIB	RIT volume
	3	RIT	RIT data
	4	IFS	IF shift data
	5	GND	GND
CN14	1	HFL	HF low (Antenna select signal)
	2	HFH	HF high (Antenna select signal)
	3	50M	50MHz (Antenna select signal)
	CAL

What are the terminal functions for the 100W FINAL UNIT (X45-3100-XX)?

Connector No.	Terminal No.	Terminal Name	Terminal Function
CN1	1	TXB	TX power supply (+8V)
	2	50B (NC)	50MHz power supply (TS-680S) / Not connected (TS-140S)
	3	PT	Temperature protection signal
CN2	1	GND	GND
	2	14D	+14V (DC-DC converter)
	3	14A	+14V
	4	14A	+14V
CN3	1	5A	+5V (PLL)
	2	5B	+5V (Microprocessor)
	3	GND	GND
CN4 (TS-680S)	1	50T	50MHz TX power supply (+8V)
	2	14S	+14V
	3	14S	+14V
CN5	1	MOT +	Fan motor power supply +
	2	MOT –	Fan motor power supply –
	DRV	Drive input
	GND	GND
	PO	Power output
	GND	GND
	(TS-680S) 50D	50MHz drive output
	GND	GND
	14S	+14V
14S	+14V
GND	GND

What are the terminal functions for the DISPLAY UNIT (X54-3050-XX)?

Connector No.	Terminal No.	Terminal Name	Terminal Function
CN1	1	SM1	S meter –
CN1	2	SM2	S meter +
CN2	1	8V	+8V
	2	PRS	Processor switch
	3	ALS	ALC meter switch
	4	SS	Standby switch
	5	PMS	Power meter switch
	6	GND	GND
	7	TXB	TX power supply (+8V)
	8	14D	+14V (DC-DC converter)
	9	14A	+14V
	10	SM1	S meter –
	11	ATS	RF ATT switch
	12	SM2	S meter +
	13	AGS	AGC switch
	14	NC	Not connected
	15	SW1	RF amplifier signal (TS-680S)
	16	SW2	VOX signal (TS-140S)
CN3	1	COM	Break in input
	2	SEM	Semi-break in signal
	3	FUL	Full break in signal
	4	KEY	Key signal
	5	NB1	Noise blanker 1 switch
	6	SS	Standby signal
	7	NBC	NB time constant
	8	CV	Carrier volume
	9	NB2	Noise blanker 2 switch
	10	PC1	Power control volume
	11	RFB	RF GAIN input
	12	PC2	Power control volume
	13	RFG	RF GAIN volume output
	14	MV1	Mic volume GND
	15	MV2	Mic volume output
	16	MV3	Mic volume input
CN4	1	S3	Key scan input
	2	S2	Key scan input
	3	SCK	Display serial clock
	4	S1	Key scan input
	5	SDA	Display serial data
	6	S0	Key scan input
	7	SLH	Display serial data (Latch signal)
	8	K3	Key scan output
	9	XP	Display function signal
	10	K2	Key scan output
	11	LM	LED (M.SCR)
	12	K1	Key scan output
	13	LF	LED (F.LOCK)
	14	K0	Key scan output
	15	L1	LED (1MHz)
	16	5C	+5V (Display)
	17	CK3	Sub-encoder pulse output
	18	CK4	Sub-encoder pulse output
CN5	1	SPO	Speaker output
	2	8M	+8V
	3	GND	GND
	4	MU	Mic up data
	5	MD	Mic down data
	6	SS	Standby switch
	7	MIC	Microphone
	8	GND	GND (Mic)

What are the terminal functions for the SIGNAL UNIT (X57-3190-00 for TS-680S / X57-3200-XX for TS-140S)?

Connector No.	Terminal No.	Terminal Name	Terminal Function
CN1	1	MV3	Mic volume output
	2	MV2	Mic volume input
	3	MV1	Mic volume GND
	4	RFG	RF GAIN volume input
	5	PC2	Power control volume
	6	RFB	RF GAIN output
	7	PC1	Power control volume
	8	NB2	Noise blanker 2 switch
	9	CV	Carrier volume
	10	NBC	NB time constant
	11	SS	Standby switch
	12	NB1	Noise blanker 1 switch
	13	KEY	Key signal
	14	FUL	Full break in signal
	15	SEM	Semi-break in signal
	16	COM	Full break in output
CN2	1	SW2	RF amplifier signal (TS-680S)
	2	SW1	VOX signal (TS-140S)
	3	NC	Not connected
	4	AGS	AGC switch
	5	SM2	S meter +
	6	ATS	RF ATT switch
	7	SM1	S meter –
	8	14A	+14V
	9	14D	+14V (DC-DC converter)
	10	TXB	TX power supply (+8V)
	11	GND	GND
	12	PMS	Power meter switch
	13	SS	Standby switch
	14	ALS	ALC meter switch
	15	PRS	Processor switch
	16	8V	+8V
CN3	1	GND	GND
	2	8V	+8V
	3	NC	Not connected
	4	14A	+14V
	5	VB2	VCO switching signal
	6	CSS	Standby control data
	7	VB1	VCO switching signal
	8	MD	Mic down data
	9	MUT	Mute signal
	10	MU	Mic up data
	11	PD	Power down signal
	12	CKY	Keying control signal
	13	SBK	Blanking signal
	14	RB	Receive timing control signal
	15	TOC	Sub-tone control signal
	16	CTX	Transmit timing control signal
	17	SSC	SSB mode data
	18	B0	Band data
	19	CWC	CW mode data
	20	B1	Band data
	21	AMC	AM mode data
	22	B2	Band data
	23	FMC	FM mode data
	24	B3	Band data
	25	CNC	CW narrow mode data
	26	B4	Band data
CN4	1	RAT	RX antenna input
	2	GND	GND
	3	RL	Relay power supply (TX 13V)
CN5 (TS-680S only)	1	50F (NC)	50~54MHz (TS-680S) / Not connected (TS-140S)
	2	28F	21.5~30MHz
	3	21F	14.5~21.5MHz
	4	14F	7.5~14.5MHz
	5	7F	4~7.5MHz
	6	4F	2.5~4MHz
	7	2F	~ 2.5MHz
CN6	1	8D	+8V (Active low-pass filter)
	2	VCV	VCO control voltage
	3	GND	GND
CN7 (TS-680S only)	1	NC	Not connected
CN7 (TS-680S only)	2	50B	50MHz power supply
CN8	1	GND	GND
	2	14D	+14V (DC-DC converter)
	3	14A	+14V (DC-DC converter)
	4	14A	+14V (DC-DC converter)
CN9	1	8V	+8V
	2	SS	Standby switch
	3	GND	GND
	4	SPO	Speaker output
	5	MD	Mic down data
	6	MU	Mic up data
CN10	1	FSQ	Squelch volume
	2	GND	GND
	3	AF3	AF GAIN output
	4	AF2	AF GAIN volume
	5	AF1	AF GAIN GND
CN11	1	PH3	Phone GND
	2	PH2	Phone input
	3	PH1	Phone output
CN12	1	SP	Speaker output
CN12	2	GND	GND
CN13	1	GND	GND
	2	VSR	Reflected wave voltage
	3	GND	GND
	4	VSF	Forward wave voltage
CN14	1	TXB	TX power supply (+8V)
CN14	2	PT	Temperature protection signal
CN15	1	PPD	Packet power down
	2	ANO	RX audio output
	3	GND	GND
	4	PSQ	Packet squelch
	5	GND	GND
	6	MV3	Mic amp. output
	7	GND	GND
	8	PRS	Processor switch
	9	RXB	RX power supply (+8V)
	10	GND	GND
CN16	1	FMM	FM modulation signal
CN16	2	GND	GND
CN17	1	GND	GND
	2	CAR	Carrier input (455kHz)
	3	GND	GND
	4	BZ	Beep sound input
CN18	1	CF1	Option filter output
CN18	2	GND	GND
CN19	1	CF2	Option filter input
CN19	2	GND	GND
CN20	DRV	Drive output
CN20	GND	GND
CN21	HET	Heterodyne input
CN21	GND	GND
CN22	VCO	VCO output
CN22	GND	GND
CN501 (TS-140S only)	1	GND	GND
CN501 (TS-140S only)	2	VOX	VOX
CN27	1	GND	GND
	2	PKD	Packet data
	3	SS	Standby switch
	4	PKS	Packet standby
	5	PSQ	Packet squelch
	6	ANO	RX audio output
	7	GND	GND
	8	GND	GND
CN28	1	NC	Not connected
	2	NC	Not connected
	3	ANO	RX audio output
	4	GND	GND
	5	PSQ	Packet squelch
	6	NC	Not connected
	7	NC	Not connected
	8	GND	GND
	9	PKS	Packet standby
	10	NC	Not connected
	11	PKD	Packet power down
	12	GND	GND
	13	SS	Standby switch
CN29	1	TON	Sub-tone input
	2	TOG	Sub-tone GND
	TOB	Sub-tone power supply (+8V)
	CAL

CLICK HERE TO DOWNLOAD KENWOOD TS-140S (02) PDF MANUAL

How is the frequency displayed in different modes?

What is the timing sequence for transmit/receive switching after the standby switch is activated?

What are the roles of the control signals in the Standby Control Circuit?

How does manual keying operate in break-in mode?

How does semi-break-in keying operate?

How does full break-in keying operate and how does it differ from manual keying?

At what temperatures do the cooling fan and temperature protection features activate?

What happens when the temperature protection circuit operates?

How much can the IF be shifted during SSB and CW receive?

How can the carrier point be adjusted in SSB mode?

What happens if a PLL loop becomes unlocked?

What are the functions of the components in the SWITCH UNIT (X41-3030-XX)?

What are the functions of the components in the 100W FINAL UNIT (X45-3100-XX)?

What are the functions of the components in the FILTER UNIT (X51-3040-XX)?

What are the functions and operational details of ICs in the CONTROL UNIT (X53-3100-XX)?

What are the functions and operational details of Transistors (Q1-Q43) and Diodes (D1-D20) in the CONTROL UNIT (X53-3100-XX)?

What are the functions of the components in the DISPLAY UNIT (X54-3050-XX)?

What are the functions and operational details of ICs in the SIGNAL UNIT?

What are the functions and operational details of Transistors (Q1-Q99) and Diodes (D1-D503) in the SIGNAL UNIT?

What are the functions of the components in the SIDE TONE UNIT (X59-1060-00)?

What are the functions of the components in the VOX UNIT (X59-1080-00)?

What are the functions of the components in the FM MIC AMP UNIT (X59-3000-02)?

What are the functions of the components in the TRX UNIT (X59-3340-00)?

What are the functions of the components in the NB2 UNIT (X59-3350-00)?

What are the functions of the components in the DELAY TIME UNIT (X59-3360-00)?

What are the functions of the components in the FAN UNIT (X59-3370-00)?

What accessories are included with the TS-140S/680S?

How is the RX section signal level measured?

What are the measurement conditions for the TX section signal levels?

What are the general preparation steps before performing adjustments?

How do I perform a reset?

How are voltages checked?

How are the PLL adjustments performed?

How are the RX adjustments performed?

How are the RIT and NB adjustments performed?

How is the TX AMP adjusted?

How is the 455kHz spurious level adjusted?

How is the base current adjusted?

How is the power output adjusted?

How is the NULL adjustment performed?

How is the protection circuit adjusted?

How is the power meter adjusted?

How is the ALC meter adjusted?

How are spurious emissions adjusted for TS-680S (50MHz and 21MHz)?

How are spurious emissions adjusted for TS-140S only (21MHz)?

How is CAR (carrier) suppression adjusted?

How is the TX frequency response adjusted?

How is the processor adjusted?

How is FM deviation adjusted?

How is the side tone monitor level adjusted?

How is the beep sound level checked/adjusted?

What are the electrical characteristics of the YK-455C-1 CW Filter?

What are the specifications of the TU-8 Tone Unit?

How is the TU-8 Tone Unit configured?

How is the TU-8 Tone Unit adjusted?

What are the specifications of the IF-10C Interface Kit?

What are the general specifications for the TS-140S/680S?

What are the transmitter specifications for the TS-140S/680S?

What are the receiver specifications for the TS-140S/680S?

What accessories are included with the TS-140S/680S?

What are the terminal functions for the SWITCH UNIT (X41-3030-XX)?

What are the terminal functions for the FILTER UNIT (X51-3040-XX)?

What are the terminal functions for the CONTROL UNIT (X53-3100-XX)?

What are the terminal functions for the 100W FINAL UNIT (X45-3100-XX)?

What are the terminal functions for the DISPLAY UNIT (X54-3050-XX)?

What are the terminal functions for the SIGNAL UNIT (X57-3190-00 for TS-680S / X57-3200-XX for TS-140S)?

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