ICOM IC-228E (01) PDF MANUAL

ICOM IC-228E (01) PDF SUMMARY:

How do I order replacement parts or request equipment information?

Be sure to include the following five points when ordering replacement parts or requesting equipment information from your dealer or Icom Service Center. This will ensure faster, more efficient service:

1. Equipment model and serial number
2. Schematic part identifier or service manual page number
3. Unit name and printed circuit board number (e.g., MAIN UNIT/8-1 6808)
4. Component part number and name (e.g., SC-1019 IC)
5. Quantity required (e.g., 5pcs.)

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What are the repair notes I should know?

1. DO NOT open transceiver covers until the transceiver is disconnected from a power source.
2. DO NOT connect the transceiver to an external power source of more than 15 V.
3. DO NOT force any of the variable components. Turn them slowly and smoothly.
4. DO NOT short any circuits or electronic parts.
5. An insulated tuning tool MUST be used for all adjustments.
6. DO NOT keep power ON for a long time when the transceiver is defective.
7. DO NOT transmit power into a signal generator or sweep generator.
8. Always connect a 20dB or 30dB attenuator between the transceiver and a deviation meter or spectrum analyzer when using such test equipment.
9. Read the instructions of test equipment thoroughly before connecting equipment to the transceiver.

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What are the selectable tuning step options for the IC-228A/H (U.S.A., Australia, Asia versions)?

5, 10, 15, 20 and 25kHz

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What are the selectable tuning step options for the IC-228E/H (Europe, Italy versions)?

12.5 and 25kHz

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What do I need to do before servicing the transceiver?

1. Detach the power cord and turn OFF the POWER SWITCH before performing any work on the transceiver.
2. DO NOT force any of the variable components. Turn them slowly and smoothly.
3. Follow the instructions exactly. If an indicated result is not obtained, repeat the instruction until the correct result is obtained.
4. Confirm defective operation of the transceiver first when checking an out-of-service unit. Verify that external sources DO NOT cause the problem.
5. Remove the transceiver case as shown in SECTION 5-1.

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What test instruments are required for PLL adjustment?

1. AC POWER SUPPLY

   • Output voltage: 13.8V DC±15%
   • Current capacity: 10A or more

2. DC VOLTMETER

   • Input impedance: 50kΩ/V DC or better

3. FREQUENCY COUNTER

   • Frequency minimum 150MHz
   • Frequency accuracy: 1 ppm or better
   • Sensitivity: 100mV or better

4. RF POWER METER (or 50Ω dummy load)

   • Minimum power rating: 100W
   • Frequency minimum: 150MHz
   • Input impedance: 50Ω
   • SWR 1.2: 1 or better

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What conditions should I be aware of during the PLL adjustment?

• Frequency display: 145.000MHz
• Transmitting

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What measurement and adjustment should I be aware of during the PLL adjustment?

1. Connect the DC voltmeter to W13.
2. Loose couple the frequency counter to the LPF circuit.

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What test instruments are required for receiver adjustment?

1. AC POWER SUPPLY

   • Output voltage 13.8V DC±15%
   • Current capacity 10A or more

2. STANDARD SIGNAL GENERATOR

   • Frequency range: 0.1~180MHz
   • Output level: -127~-17dBm (0.1 µV~32 mV)

3. DC VOLTMETER

   • Input impedance: 50kΩ/V DC or better

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What conditions should I be aware of during the receiver adjustment for sensitivity?

1. Frequency display: 145.000MHz

2. Receiving

3. Apply an RF signal to the ANTENNA CONNECTOR.

   • Level: -97dBm (3.16µV)
   • Dev.: ±3.5kHz
   • Mod.: 1 kHz

4. R36: Max. counterclockwise

5. Apply an RF signal to the ANTENNA CONNECTOR. Level: -97 dBm (3.16µV) Dev. : ±?kHz

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What measurement and adjustment should I be aware of during the receiver adjustment for sensitivity?

1. Connect the DC voltmeter to the cathode of D12. NOTE: Adjust the signal generator output each time until the DC voltmeter is at 30% on the full scale reading of the lowest range.
2. Adjust in sequence L8, L7, L6, and L5.
3. Repeat the above adjustments 2 or 3 times.
4. Adjust L3, L2, L1, and R36.

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What conditions should I be aware of during the receiver adjustment for the S-meter function?

1. Frequency display: 145.000MHz

2. Receiving

3. Apply an RF signal to the ANTENNA CONNECTOR.

   • Level: -107 dBm (1 µV)
   • Dev.: ±3.5kHz
   • Mod.: 1 kHz

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What should the function display indicate during the S-meter adjustment?

S3 (2 dots)

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What test instruments are required for transmitter adjustment?

1. AC POWER SUPPLY

   • Output voltage: 13.8V DC±15%
   • Current capacity: 10A or more

2. RF POWER METER

   • Terminated type
   • Minimum power rating: 50W
   • Frequency minimum: 150MHz
   • Input impedance: 50Ω
   • SWR 1.2: 1 or better

3. FM DEVIATION METER

   • Frequency minimum 150MHz
   • Measuring range: 0~±10kHz

4. AF GENERATOR

   • Frequency range: 200~2000Hz
   • Output range: 2~200 mV

5. ATTENUATOR

   • Attenuation: 40dB or 50dB
   • Input power rating: At least 50W

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What conditions should I be aware of during the transmitter adjustment for output power?

1. Frequency display: 145.000MHz
2. Transmitting
3. SWITCH: HIGH
4. SWITCH: LOW

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What conditions should I be aware of during the transmitter adjustment for deviation?

1. Frequency display: 146.000 MHz (IC-228E/H Europe: 145.000 MHz)

2. Transmitting

3. Apply an AF signal to the MIC CONNECTOR

   • Level: 20mV/1kHz (1C-228A/H U.S.A. 65mV/1kHz)

4. Set the FM deviation meter.

   • HPF: 50Hz
   • LPF: 20kHz

5. SWITCH: OFF

6. Apply an AF signal to the MIC CONNECTOR

   • Level: 2mV/1 kHz (IC-228AIH U.S.A. 6.5mV/1 kHz)

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What measurement and adjustment should I be aware of during the transmitter adjustment for output power?

1. Connect the RF power meter to the ANTENNA CONNECTOR.
2. The output power should be 25 W (IC-228A/E) or 45 W (IC-228H) when the HI/LO switch is set to HIGH.
3. The output power should be 5 W (Any model) when the HI/LO switch is set to LOW.

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What measurement and adjustment should I be aware of during the transmitter adjustment for deviation?

1. Connect the FM deviation meter to the ANTENNA CONNECTOR via the attenuator.
2. Adjust R90 on the MAIN UNIT for maximum deviation.
3. Adjust R98 on the MAIN UNIT for 70% deviation.
4. The deviation should be ±4.8kHz.
5. The deviation should be ±3.5kHz.

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What measurement and adjustment should I be aware of during the transmitter adjustment for tone deviation?

1. Connect the FM deviation meter to the ANTENNA CONNECTOR via the attenuator.
2. Adjust R86 on the MAIN UNIT for tone deviation.
3. The tone deviation should be ±0.85kHz (IC-228A/H U.S.A., Asia only).

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What measurement and adjustment should I be aware of during the transmitter adjustment for power module input?

1. Connect the RF power meter to the point where solder is removed.
2. Remove solder and disconnect 1c1 pin 1 from MAIN UNIT.
3. Verify reference for repair.
4. The power module input should be More than + 26dBm (1 W (400mW) (IC-228H).
5. The power module input should be More than + 23dBm (200mW) (IC-228AIE).