PANASONIC SA-AK780PH (01) PDF Document

When servicing the PANASONIC SA-AK780PH, observe the following:

1. Observe the original lead dress. If a short circuit is found, replace all parts which have been overheated or damaged by the short circuit.
2. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly installed.
3. After servicing, carry out the following leakage current checks to prevent the customer from being exposed to shock hazards.

To perform the Leakage Current Cold Check on the PANASONIC SA-AK780PH:

1. Unplug the AC cord and connect a jumper between the two prongs on the plug.
2. Measure the resistance value, with an ohmmeter, between the jumpered AC plug and each exposed metallic cabinet part on the equipment such as screwheads, connectors, control shafts, etc. When the exposed metallic part has a return path to the chassis, the reading should be between 1MΩ and 5.2MΩ.

To perform the Leakage Current Hot Check on the PANASONIC SA-AK780PH:

1. Plug the AC cord directly into the AC outlet. Do not use an isolation transformer for this check.
2. Connect a 1.5kΩ, 10 watts resistor, in parallel with a 0.15μF capacitors, between each exposed metallic part on the set and a good earth ground such as a water pipe, as shown in Figure 1.
3. Use an AC voltmeter, with 1000 ohms/volt or more sensitivity, to measure the potential across the resistor.
4. Check each exposed metallic part, and measure the voltage at each point.
5. Reverse the AC plug in the AC outlet and repeat each of the above measurements.
6. The potential at any point should not exceed 0.75 volts RMS. A leakage current tester (Simpson Model 229 or equivalent) may be used to make the hot checks, leakage current must not exceed 1/2 milliamp. In case a measurement is outside of the limits specified, there is a possibility of a shock hazard, and the equipment should be repaired and rechecked before it is returned to the customer.

Be sure to disconnect the mains cord before adjusting the voltage selector on the PANASONIC SA-AK780PH (For PH only). Use a minus(-) screwdriver to set the voltage selector (on the rear panel) to the voltage setting for the area in which the unit will be used. (If the power supply in your area is 110V ~ 127V or 220V ~ 240V, set to the “110V ~ 127V or 220V ~ 240V” position.) Note that this unit will be seriously damaged if this setting is not made correctly. (There is no voltage selector for some countries, the correct voltage is already set.)

Disconnect AC power to discharge unit AC Capacitors as such (C5700, C5701, C5703, C5704, C5705, C5706, C5707) through a 10 Ω, 10 W resistor to ground. DO NOT SHORT-CIRCUIT DIRECTLY (with a screwdriver blade, for instance), as this may destroy solid state devices. After repairs are completed, restore power gradually using a variac, to avoid overcurrent.

The current consumption at AC 110V~127V / 220V~240V, 50/60 Hz in NO SIGNAL mode volume minimal should be approximately 500 mA (For PH only). The current consumption at AC 120V, 60 Hz in NO SIGNAL mode volume minimal should be approximately 500 mA (For PN only).

The protection circuitry on the PANASONIC SA-AK780PH may have operated if either of the following conditions are noticed:

• No sound is heard when the power is turned on.
• Sound stops during a performance.

If the protection circuitry on the PANASONIC SA-AK780PH operates, follow this procedure:

1. Turn off the power.
2. Determine the cause of the problem and correct it.
3. Turn on the power once again after one minute.

Note: When the protection circuitry functions, the unit will not operate unless the power is first turned off and then on again.

To help reduce the incidence of component damage caused by electrostatic discharge (ESD) on the PANASONIC SA-AK780PH:

1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any ESD on your body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging ESD wrist strap, which should be removed for potential shock reasons prior to applying power to the unit under test.
2. After removing an electrical assembly equipped with ES devices, place the assembly on a conductive surface such as aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly.
3. Use only a grounded-tip soldering iron to solder or unsolder ES devices.
4. Use only an anti-static solder removal device. Some solder removal devices not classified as “anti-static (ESD protected)” can generate electrical charge sufficient to damage ES devices.
5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ES devices.
6. Do not remove a replacement ES device from its protective package until immediately before you are ready to install it. (Most replacement ES devices are packaged with leads electrically shorted together by conductive foam, aluminum foil or comparable conductive material).
7. Immediately before removing the protective material from the leads of a replacement ES device, touch the protective material to the chassis or circuit assembly into which the device will be installed. Caution: Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.
8. Minimize bodily motions when handling unpackaged replacement ES devices. (Otherwise harmless motion such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity (ESD) sufficient to damage an ES device).

Special care must be taken to avoid electrostatic breakdown when servicing and handling the laser diode in the traverse unit of the PANASONIC SA-AK780PH:

1. Do not give a considerable shock to the optical pickup unit as it has an extremely high-precise structure.
2. To prevent the laser diode from the electrostatic discharge damage, the flexible cable of the optical pickup unit removed should be short-circuited with a short pin or a clip.
3. The flexible cable may be cut off if an excessive force is applied to it. Use caution when handling the flexible cable.
4. The antistatic FPC is connected to the new optical pickup unit. After replacing the optical pickup unit and connecting the flexible cable, cut off the antistatic FPC.

To prevent electrostatic breakdown when servicing devices like the DVD player optical pickup (laser diode) on the PANASONIC SA-AK780PH:

Worktable grounding:

1. Put a conductive material (sheet) or iron sheet on the area where the optical pickup is placed, and ground the sheet.

Human body grounding:

1. Use the anti-static wrist strap to discharge the static electricity form your body.

This service manual for the PANASONIC SA-AK780PH contains technical information which will allow service personnel’s to understand and service this model. Please place orders using the parts list and not the drawing reference numbers.

This service manual for the PANASONIC SA-AK780PH does not contain the following information on CD Mechanism Unit (CR14C):

• Schematic Diagram, Block Diagram and P.C.B. layout of CD Mechanism Unit (CR14C) P.C.B.
• Parts List for individual parts of CD Mechanism Unit (CR14C).
• Exploded View and Part List for individual parts of CD Mechanism Unit (CR14C).

Please refer to the original service manual (Order No. MD0805031CE) for this information.

The following components are supplied as an assembled part for the micro-processor, EEPROM & FLASH ROM IC on the PANASONIC SA-AK780PH:

• Micro-processor IC, IC2801 (RFKWMAK780PN)
• EEPROM IC, IC2200 (RFKWEAK780PN)
• FLASH ROM IC, IC701 (RFKWFAK780PN)

Before replacement of micro-processor IC, please check the version no. It may need matching with ROM correction.

The RMS output power for the Front Ch (both channels driven) on the PANASONIC SA-AK780PH is 250 W per channel at 6 Ω, 1 kHz, 10% THD.

The RMS output power for the Subwoofer Ch on the PANASONIC SA-AK780PH is 250 W per channel at 6 Ω, 100 Hz, 10% THD.

The Total RMS stereo mode power for the PANASONIC SA-AK780PH is 750 W.

The PMPO Output Power for the PANASONIC SA-AK780PH (For PN only) is 8300 W.

The preset station numbers for the FM/AM TUNER, TERMINALS SECTION on the PANASONIC SA-AK780PH are 30 stations for FM and 15 stations for AM.

The Frequency Modulation (FM) frequency range for the PANASONIC SA-AK780PH (For PH only) is 87.50 MHz to 108.00 MHz (200 kHz step).

The Frequency Modulation (FM) frequency range for the PANASONIC SA-AK780PH (For PN only) is 87.9 MHz to 107.9 MHz (200 kHz step) or 87.5 MHz to 108.0 MHz (100 kHz step).

The antenna terminal for the PANASONIC SA-AK780PH is 75 Ω (unbalanced).

The Amplitude Modulation (AM) frequency range for the PANASONIC SA-AK780PH (For PH only) is 522 KHz to 1629 kHz (9 kHz step).

The Amplitude Modulation (AM) frequency range for the PANASONIC SA-AK780PH (For PN only) is 520 KHz to 1710 kHz (10 kHz step).

For the Aux input on the PANASONIC SA-AK780PH:

• Sensitivity: 100 mV, 4.7 kΩ
• Terminal: RCA pin jack

For the Music Port jack on the PANASONIC SA-AK780PH, the terminal type is Stereo, 3.5 mm jack. For the Headphone jack, the terminal type is Stereo, 3.5 mm jack.

The output level for the Headphone jack on the PANASONIC SA-AK780PH when the disc output level is CD, 1kHz, -20dB is 32 Ω (Max).

For the Mic jack on the PANASONIC SA-AK780PH:

• Sensitivity: 0.7 mV, 1.2 kΩ
• Terminal: Mono, 3.5 mm jack (1 system)

The PANASONIC SA-AK780PH can play the following discs in its DISC SECTION:

• (1) CD-Audio (CD-DA)
• (2) CD-R/RW (CD-DA, MP3* formatted disc)
• (3) MP3* (* MPEG-1 Layer 3, MPEG-2 Layer 3)

The Pick up wavelength for the CD SECTION of the PANASONIC SA-AK780PH is 795 nm (CD).

The Audio output for discs on the PANASONIC SA-AK780PH is 2.1 (FL, FR, SW), where FL is Front left channel, FR is Front right channel, and SW is Subwoofer channel.

The USB standard supported by the USB SECTION of the PANASONIC SA-AK780PH is USB 2.0 full speed.

The media file format support for MP3 (*.mp3) on the USB SECTION of the PANASONIC SA-AK780PH is FAT 12, FAT 16, FAT 32 for the USB device file system.

For USB media file playback on the PANASONIC SA-AK780PH:

• USB port power: 500 mA (Max)
• Bit rate: 16 kbps to 320 kbps (P.B)

For USB recording on the PANASONIC SA-AK780PH:

• Recording file format: MP3 (*.mp3)
• Bit rate: 128 kbps / 192 kbps / 320 kbps
• USB recording speed: 1x, max 4x (CD only)

The power supply for the PANASONIC SA-AK780PH is:

• For PH only: AC 110 to 127/220 to 240 V, 50/60 Hz
• For PN only: AC 120 V, 60 Hz

The dimensions (W x H x D) of the PANASONIC SA-AK780PH are 250 mm x 331 mm x 326 mm. The mass is approximately 4.6 kg.

The power consumption in standby mode for the PANASONIC SA-AK780PH is:

• For PH only: 0.5 W (Approximate)
• For PN only: 0.3 W (Approximate)

The system configuration for the PANASONIC SC-AK780PN-K is:

• Main Unit: SA-AK780PN-K
• Front Speakers: SB-AK780PN-K
• Subwoofer: SB-WAK780PN-K

The system configuration for the PANASONIC SC-AK780PH-K is:

• Main Unit: SA-AK780PH-K
• Front Speakers: SB-AK780PN-K
• Subwoofer: SB-WAK780PN-K

To use the Standby/on switch ( /l, POWER) on the main unit of the PANASONIC SA-AK780PH, press it to switch the unit from on to standby mode or vice versa. In standby mode, the unit is still consuming a small amount of power.

The Track skip or search button on the front panel of the PANASONIC SA-AK780PH is used for track skip or search, check program content, preset channel selection, tuning function, time adjustment, timer operation, and manual EQ setting.

The AUTO OFF function on the remote control for the PANASONIC SA-AK780PH allows you to turn off the unit in disc or USB mode only after left unused for 10 minutes. Press the button to activate the function. Press the button again to cancel. The setting is maintained even if the unit is turned off.

To activate the DIMMER function on the remote control for the PANASONIC SA-AK780PH, press the button to dim the display panel. Press the button again to cancel the function.

To activate the MUTE function on the remote control for the PANASONIC SA-AK780PH, press the button to mute the sound. Press the button again or adjust the volume to cancel the function.

The CR14 Changer Mechanism Check in Doctor Mode for the PANASONIC SA-AK780PH is performed by pressing the [DISC] button on the remote control in Doctor Mode. The process involves loading TRAY 1, opening and closing TRAY 2, 3, 4, and 5 while TRAY 1 is in LOAD condition, unloading Tray 1 to the STOCK position, and then loading Tray 1 to the PLAY position. If all steps operate normally without any error, the FL display will show [CHGR_OK_].

To enter Doctor Mode on the PANASONIC SA-AK780PH in CD Mode, press the [ ] button on the main unit followed by [4] and [7] on the remote control. To exit Doctor Mode, press the [OK] button on the remote control.

To check the FL segments display (All segments will light up) in Doctor Mode on the PANASONIC SA-AK780PH, press the [1] button on the remote control.

To perform the CD OPEN Test in Doctor Mode on the PANASONIC SA-AK780PH:

1. Press the [DEL] button on the remote control.
2. Press the [OPEN/CLOSE] button on the main unit to close the disc tray.

The FL display can show “OPE” and “Y” indicating that the tray can be moved.

To perform CR14 Reliability Test 1 (no retry) in Doctor Mode on the PANASONIC SA-AK780PH, press [ ], [1], [1] on the remote control. If a mechanism error occurs, it should stop the test (no retry, no recovery process). The test mode is cleared by power OFF, and reading and playback should not be done. The FL display will show a counter that increments by one, and when it reaches 9999, it will change to 0000.

To perform CR14 Reliability Test 2 (with retry) in Doctor Mode on the PANASONIC SA-AK780PH, press [ ], [1], [2] on the remote control. Even if a mechanism error occurs, it should retry as normal operation. The test mode is cleared by power OFF, and reading and playback should not be done. The FL display will show a counter that increments by one, and when it reaches 9999, it will change to 0000.

To enter Service Mode on the PANASONIC SA-AK780PH in CD Mode, press and hold the [ ] button on the main unit for 2 seconds followed by the [ ] button on the remote control for 2 seconds. To exit, press the [ON/OFF ] button on the main unit or remote control.

To check the Error Code History in Service Mode on the PANASONIC SA-AK780PH, press the [1] button on the remote control. To clear the history, press & hold the [0] button for 5 seconds or more.

To check the Micro-P Version Display in Service Mode on the PANASONIC SA-AK780PH, press the [2] button on the remote control. This check displays:

1. System Version.
2. Jupiter Micro-processor version.
3. Micro-processor Version.

To check the USB Error Code History in Service Mode on the PANASONIC SA-AK780PH, press the [5] button on the remote control. To clear the history, press & hold the [0] button for 5 seconds or more.

To check for CD operation (self-adjustment) by viewing the CD Self Adjustment Result in Service Mode on the PANASONIC SA-AK780PH, press the [6] button on the remote control. The display shows the self adjustment result: CLVB (1=OK, 0=NG), TFLOCK (1=OK, 0=NG), and FLOCK (1=OK, 0=OK).

To reset to the default setting (Cold Start) in Service Mode on the PANASONIC SA-AK780PH, press the [3] button on the remote control.

The steps for disassembly of the Top Cabinet on the PANASONIC SA-AK780PH are:

1. Remove 3 screws on each side (Step 1).
2. Remove 5 screws (Step 2) from the Back view.
3. Slightly lift the sides of Top Cabinet outwards as arrow shown (Step 3).
4. Push the Top Cabinet backwards as arrow shown to release the catches (Step 4).
5. Remove the Top Cabinet (Step 5).

To disassemble the CD Mechanism Unit (CR14C) on the PANASONIC SA-AK780PH, follow these steps after completing steps (Step 1) to (Step 5) of Item 9.3:

1. Remove 1 screw (Step 1).
2. Detach 25P FFC at the connector (CN2801) on Main P.C.B. (Step 2).
3. Detach 11P FFC at the connector (CN2802) on Main P.C.B. (Step 3).
4. Release claws outwards on both sides (Step 4).
5. Release the CD Mechanism Unit (CR14C) from the catches & locators (Step 5).
6. Lift up the CD Mechanism Unit (CR14C) as arrow shown to remove CD Mechanism Unit (CR14C) (Step 6). Caution: During assembling, ensure the CD Mechanism Unit (CR14C) is seated properly on the locators.

To disassemble the Rear Panel on the PANASONIC SA-AK780PH (For PH only), follow these steps after completing steps (Step 1) to (Step 5) of Item 9.3:

1. Detach 2P wire at the connector (CN2810) on Main P.C.B. (Step 1).
2. Remove 10 screws (Step 2).
3. Release 2 catches from each side of the Rear Panel (Step 3).
4. Slightly lift up the CD Mechanism Unit (CR14C) to release from the 2 locators (Step 4).
5. Detach Voltage Selector from Rear Panel as arrow shown (Step 5).
6. Remove the Rear Panel (Step 6).

To disassemble the Rear Panel on the PANASONIC SA-AK780PH (For PN only), follow these steps after completing steps (Step 1) to (Step 5) of Item 9.3:

1. Remove 9 screws (Step 2).
2. Release 2 catches from each side of the Rear Panel (Step 3).
3. Slightly lift up the CD Mechanism Unit (CR14C) to release from the 2 locators (Step 4).
4. Detach Voltage Selector from Rear Panel as arrow shown (Step 5).
5. Remove the Rear Panel (Step 6).

To disassemble the Fan Unit on the PANASONIC SA-AK780PH, follow these steps after completing steps (Step 1) to (Step 5) of Item 9.3 and (Step 1) of Item 9.5:

1. Release fan wire from the holder (Step 1).
2. Remove 1 screw (Step 2).
3. Slightly lift up the CD Mechanism Unit (CR14C) to release from the 2 locators (Step 4).
4. Remove the Rear Panel (Step 5).

To disassemble the Front Panel Assembly on the PANASONIC SA-AK780PH, follow these steps after completing steps (Step 1) to (Step 5) of Item 9.3:

1. Detach 30P FFC at the connector (CN3200) on Main P.C.B. (Step 1).
2. Detach 27P FFC at the connector (CN2806) on Main P.C.B. (Step 2).
3. Detach 5P wire at the connector (CN2813) on Main P.C.B. (Step 3).
4. Detach 10P FFC at the connector (CN2807) on Main P.C.B. (Step 4).
5. Release claws on both sides (Step 5).
6. Release catches at both side (Step 6). Caution: During assembling, ensure both the claws and catches are fully catched.
7. Release tabs at the bottom (Step 7). Caution: Do not exert strong force when releasing the tabs.
8. Remove the Front Panel Assembly as arrow shown (Step 8).

To disassemble the Mic P.C.B. on the PANASONIC SA-AK780PH, follow these steps after completing steps (Step 1) to (Step 5) of Item 9.3 and (Step 1) to (Step 8) of Item 9.7:

1. Remove the Mic Volume Knob (Step 1).
2. Cut the tie wrap (Step 2). Caution: Remember to tie the 5P wire with tie wrap to the Front Panel as diagram shown.
3. Remove 2 screws (Step 3).
4. Release the catch (Step 4).
5. Remove the Mic P.C.B. (Step 5).

To disassemble the Panel P.C.B. on the PANASONIC SA-AK780PH, follow these steps after completing steps (Step 1) to (Step 5) of Item 9.3, (Step 1) to (Step 8) of Item 9.7, and (Step 1) to (Step 5) of Item 9.8:

1. Remove the Volume Knob (Step 1).
2. Remove the Track Knob (Step 2).
3. Remove 8 screws (Step 3).
4. Remove 1 screw (Step 4).
5. Release 8 catches (Step 5).
6. Lift up the Panel P.C.B. slightly (Step 6).
7. Detach 5P wire at the connector (CN6602) on Panel P.C.B. (Step 7).
8. Remove the Panel P.C.B. (Step 8).

To disassemble the Dynamic Bass Knob & Dynamic Bass Button Unit on the PANASONIC SA-AK780PH, follow these steps after completing Item 9.3, 9.7, 9.8, and 9.9:

Disassembly of Dynamic Bass Knob:

1. Release 4 catches (Step 1).
2. Remove the Dynamic Bass Knob Assembly (Step 2).
3. Release 3 catches (Step 3).
4. Remove the Dynamic Bass Knob (Step 4). Caution 1: Do not misplace the Volume Gear. Caution 2: Volume gear to align to Volume Knob & engage to Dynamic Bass Knob during assembly.

Disassembly of Dynamic Bass Button Unit:

1. Release 4 catches (Step 1).
2. Release 2 catches (Step 2).

To disassemble the Memory P.C.B. on the PANASONIC SA-AK780PH, follow these steps after completing Item 9.3, 9.7, 9.8, and 9.9:

1. Release 8 catches (Step 1).
2. Remove the Deck Cover (Step 2).
3. Remove the Dynamic Bass Button Unit (Step 3).

To disassemble the MPort/Headphone P.C.B. on the PANASONIC SA-AK780PH, follow these steps after completing Item 9.3 and 9.7:

1. Remove 1 screw (Step 1).
2. Release 2 catches (Step 2).
3. Remove the MPort/Headphone P.C.B. (Step 3).
4. Remove the Memory Lighting Unit (Step 4).
5. Release 2 catches (Step 5).
6. Remove the Memory P.C.B. as arrow shown (Step 6).

To disassemble the CD Servo P.C.B. on the PANASONIC SA-AK780PH, follow these steps after completing Item 9.3 and 9.4:

1. Upset the CD Mechanism Unit (CR14C) (Step 1).
2. Desolder 4 solder points (Step 2).
3. Remove 3 screws (Step 3).
4. Flip over the CD Servo P.C.B. (Step 4).
5. Detach the 16P FFC at connector (CN7001) at CD Servo P.C.B. (Step 5).
6. Remove CD Servo P.C.B. (Step 6).

To disassemble the D-Amp P.C.B. & Fan on the PANASONIC SA-AK780PH, follow these steps:

Disassembly of D-Amp P.C.B. (following steps from Item 9.3, 9.4, and 9.14):

1. Remove 4 screws (Step 1).
2. Detach 17P FFC at the connector (CN5050) on D-Amp P.C.B. (Step 2).
3. Detach 8P wire at the connector (CN5500) on D-Amp P.C.B. (Step 3).
4. Detach 2P wire at the connector (CN2820) on Main P.C.B. (Step 4).
5. Remove 2 screws (Step 5).
6. Lift up the D-Amp P.C.B. together with inner chassis assembly as arrow shown (Step 6).
7. Place the D-Amp P.C.B. on a support block (Step 7).
8. Remove 3 screws (Step 8).
9. Lift up to remove the D-Amp P.C.B. (Step 9). Caution: During assembling, ensure the D-Amp P.C.B. is seated properly on the locator of the Inner Chassis.

Disassembly of Fan Unit (following steps from Item 9.3 and 9.4, and Item 9.14.2):

1. Remove 1 screw (Step 1).
2. Remove the Fan Unit (Step 2).

To replace the Audio Digital Amp IC (IC5400) on the PANASONIC SA-AK780PH, follow these steps after completing Item 9.3, 9.4, and 9.14:

Disassembly of Audio Digital Amp IC (IC5400):

1. Desolder pins of Audio Digital Amp IC (IC5400) on reverse side of D-Amp P.C.B. (Step 1).
2. Remove 1 screw (Step 2).
3. Remove TR Spring as arrow shown (Step 3).
4. Remove Audio Digital Amp IC (IC5400) from the Heatsink Unit A (Step 4). Caution: During replacement of the part, avoid touching the Heatsink, it may lead to injuries.

Assembly of Audio Digital Amp IC (IC5400):

1. Mount the Audio Digital Amp IC (IC5400) on to the D-Amp P.C.B. (Step 1).
2. Screw back TR Spring to hold the Audio Digital Amp IC (IC5400) onto the Heatsink Unit A (Step 2).
3. Solder the pins of Audio Digital Amp IC (IC5400) (Step 3).
4. Use a blower to remove the minute particles after the screwing of TR Spring (Step 4). Caution: Ensure pins of the Audio Digital Amp IC (IC5400) are properly seated and soldered on D-Amp P.C.B..

To replace the Audio Digital Amp IC (IC5000) on the PANASONIC SA-AK780PH, follow these steps after completing Item 9.3, 9.4, and 9.14:

Disassembly of Audio Digital Amp IC (IC5000):

1. Desolder pins of Audio Digital Amp IC (IC5000) on reverse side of D-Amp P.C.B. (Step 1).
2. Remove 1 screw (Step 2).
3. Remove TR Spring as arrow shown (Step 3).
4. Remove Audio Digital Amp IC (IC5000) from the Heatsink Unit A (Step 4). Caution: During replacement of the part, avoid touching the Heatsink, it may lead to injuries.

Assembly of Audio Digital Amp IC (IC5000):

1. Mount the Audio Digital Amp IC (IC5000) on to the D-Amp P.C.B. (Step 1).
2. Screw back TR Spring to hold the Audio Digital Amp IC (IC5000) onto the Heatsink Unit A (Step 2).
3. Solder the pins of Audio Digital Amp IC (IC5000) (Step 3).
4. Use a blower to remove the minute particles after the screwing of TR Spring (Step 4). Caution: Ensure pins of the Audio Digital Amp IC (IC5000) are properly seated and soldered on D-Amp P.C.B..

To replace the Audio Digital Amp IC (IC5200) on the PANASONIC SA-AK780PH, follow these steps after completing Item 9.3, 9.4, and 9.14:

Disassembly of Audio Digital Amp IC (IC5200):

1. Desolder pins of Audio Digital Amp IC (IC5200) on reverse side of D-Amp P.C.B. (Step 1).
2. Remove 1 screw (Step 2).
3. Remove TR Spring as arrow shown (Step 3).
4. Remove Audio Digital Amp IC (IC5200) from the Heatsink Unit A (Step 4). Caution: During replacement of the part, avoid touching the Heatsink, it may lead to injuries.

Assembly of Audio Digital Amp IC (IC5200):

1. Mount the Audio Digital Amp IC (IC5200) on to the D-Amp P.C.B. (Step 1).
2. Screw back TR Spring to hold the Audio Digital Amp IC (IC5200) onto the Heatsink Unit A (Step 2).
3. Solder the pins of Audio Digital Amp IC (IC5200) (Step 3).
4. Use a blower to remove the minute particles after the screwing of TR Spring (Step 4). Caution: Ensure pins of the Audio Digital Amp IC (IC5200) are properly seated and soldered on D-Amp P.C.B..

To disassemble the Main P.C.B. on the PANASONIC SA-AK780PH, follow these steps after completing Item 9.3, 9.4, 9.7, and 9.14:

1. Detach 11P wire at the connector (CN5802) on SMPS P.C.B. (Step 1).
2. Detach 2P wire at the connector (CN2810) on Main P.C.B. (Step 2).
3. Remove 2 screws at the Rear Panel (Step 3).
4. Remove 2 screws on at bottom chassis (Step 4).
5. Remove the Main P.C.B. (Step 5).

To disassemble the SMPS P.C.B. on the PANASONIC SA-AK780PH, follow these steps after completing Item 9.3, 9.4, and 9.14:

1. Detach 11P wire at the connector (CN5802) on SMPS P.C.B. (Step 1).
2. Remove 4 screws (Step 2).
3. Lift up and remove the SMPS P.C.B. as arrow shown (Step 3).
4. Flip the SMPS P.C.B. and desolder the wire’s pin (Step 4). Caution: Red, Black, White, Blue wires (For PH only). Caution: Red, Black wires (For PN only). Caution: During assembly, ensure the SMPS P.C.B. is seated properly at the locators.

To replace the Switching Regulator IC (IC5701) on the SMPS P.C.B. of the PANASONIC SA-AK780PH, follow these steps after completing Item 9.3, 9.4, 9.14, and 9.19:

Disassembly of Switching Regulator IC (IC5701):

1. Desolder pins of the Switching Regulator IC (IC5701) on the solder side of SMPS P.C.B. (Step 1).
2. Remove 1 screw from the Switching Regulator IC (IC5701) (Step 2).
3. Remove the Switching Regulator IC (IC5701) (Step 3). Caution: During replacement of the part, avoid touching the heatsink, it may lead to injuries.

Assembly of Switching Regulator IC (IC5701):

1. Apply grease to the Heatsink Unit B (Step 1).
2. Mount the Switching Regulator IC (IC5701) on to SMPS P.C.B. (Step 2). Caution: Ensure pins of the Switching Regulator IC (IC5701) are properly seated on SMPS P.C.B..
3. Solder pins of the Switching Regulator IC (IC5701) on the solder side of SMPS P.C.B. (Step 3).
4. Screw the Switching Regulator IC (IC5701) to the Heatsink Unit B (Step 4). Caution: Ensure the Switching Regulator IC (IC5701) is tightly screwed to the Heatsink Unit B.

To replace the Rectifier Diode (D5702) on the SMPS P.C.B. of the PANASONIC SA-AK780PH, follow these steps after completing Item 9.3, 9.4, 9.14, and 9.19:

Disassembly of Rectifier Diode (D5702):

1. Desolder pins of the Rectifier Diode (D5702) on the solder side of SMPS P.C.B. (Step 1).
2. Desolder pins of the Heatsink Unit B (Step 2).
3. Remove 1 screw (Step 3).
4. Remove the Heatsink Unit B as arrow shown (Step 4).
5. Remove 1 screw (Step 5).
6. Remove the Rectifier Diode (D5702) from the Heatsink Unit B (Step 6). Caution: During replacement of the part, avoid touching the heatsink, it may lead to injuries.

Assembly of Rectifier Diode (D5702):

1. Apply grease to the Heatsink Unit B (Step 1).
2. Screw the Rectifier Diode (D5702) to the Heatsink Unit B (Step 2). Caution: Ensure the Rectifier Diode (D5702) is well tightened to the Heatsink Unit B.
3. Mount the Heatsink Unit B & Rectifier Diode (D5702) on to SMPS P.C.B. (Step 3). Caution: Ensure pins of the Rectifier Diode (D5702) is properly seated on SMPS P.C.B.
4. Screw the Switch Regulator IC (IC5701) to the Heatsink Unit B (Step 4). Caution: Ensure the Heatsink Unit B is properly seated on SMPS P.C.B..
5. Solder pins of the Rectifier Diode (D5702) on the solder side of SMPS P.C.B. (Step 5).
6. Solder pins of the Heatsink Unit B on the solder side of SMPS P.C.B. (Step 6).

To replace the Regulator Diode (D5801) on the SMPS P.C.B. of the PANASONIC SA-AK780PH, follow these steps after completing Item 9.3, 9.4, 9.14, and 9.19:

Disassembly of Regulator Diode (D5801):

1. Desolder pins of the Regulator Diode (D5801) on the solder side of SMPS P.C.B. (Step 1).
2. Remove 1 screw (Step 2).
3. Remove the Regulator Diode (D5801) (Step 3). Caution: During replacement of the part, avoid touching the heatsink, it may lead to injuries.

Assembly of Regulator Diode (D5801):

1. Apply grease to the Heatsink Unit C (Step 1).
2. Mount & screw the Regulator Diode (D5801) to the Heatsink Unit C on the SMPS P.C.B. (Step 2). Caution: Ensure the Regulator Diode (D5801) is well tightened to the Heatsink Unit C.
3. Solder pins of the Regulator Diode (D5801) on the solder side of SMPS P.C.B. (Step 3). Caution: Ensure pins of the Regulator Diode (D5801) is properly seated and soldered on SMPS P.C.B..

To replace the Regulator Diode (D5802) on the SMPS P.C.B. of the PANASONIC SA-AK780PH, follow these steps after completing Item 9.3, 9.4, 9.14, and 9.19:

Disassembly of Regulator Diode (D5802):

1. Desolder pins of the Regulator Diode (D5802) on the solder side of SMPS P.C.B. (Step 1).
2. Remove 1 screw (Step 2).
3. Remove the Regulator Diode (D5802) from the Heatsink Unit C (Step 3). Caution: During replacement of the part, avoid touching the heatsink, it may lead to injuries.

Assembly of Regulator Diode (D5802):

1. Apply grease to the Heatsink Unit C (Step 1).
2. Mount & screw the Regulator Diode (D5802) to the Heatsink Unit C on SMPS P.C.B. (Step 2). Caution: Ensure the Regulator Diode (D5802) is well tightened to the heatsink unit C.
3. Solder pins of the Regulator Diode (D5802) on the solder side of SMPS P.C.B. (Step 3). Caution: Ensure pins of the Regulator Diode (D5802) is properly seated and soldered on SMPS P.C.B..

To replace the Regulator Diode (D5803) on the SMPS P.C.B. of the PANASONIC SA-AK780PH, follow these steps after completing Item 9.3, 9.4, 9.14, and 9.19:

Disassembly of Regulator Diode (D5803):

1. Desolder pins of the Regulator Diode (D5803) on the solder side of SMPS P.C.B. (Step 1).
2. Remove 1 screw (Step 2).
3. Remove the Regulator Diode (D5803) from the Heatsink Unit C (Step 3). Caution: During replacement of the part, avoid touching the heatsink, it may lead to injuries.

Assembly of Regulator Diode (D5803):

1. Apply grease to the Heatsink Unit C (Step 1).
2. Mount & screw the regulator diode (D5803) to the Heatsink Unit C on SMPS P.C.B. (Step 2). Caution: Ensure the Regulator Diode (D5803) is well tightened to the Heatsink Unit C.
3. Solder pins of the Regulator Diode (D5803) on the solder side of SMPS P.C.B. (Step 3). Caution: Ensure pins of the regulator diode (D5803) are properly seated and soldered on SMPS P.C.B..

To disassemble the AC Inlet P.C.B. on the PANASONIC SA-AK780PH, follow these steps after completing Item 9.3:

1. Remove 1 screw (Step 1).
2. Release the tab at the Rear Panel as arrow show (Step 2).
3. Cut 2 tie wraps (Step 3). Caution: Remember to tie the red, black, blue wires with the wraps to the bottom chassis as diagram show.
4. Remove 2 screws on AC Inlet P.C.B. (Step 4).
5. Lift up AC inlet P.C.B. from bottom chassis (Step 5). Caution: During assembling, ensure the AC Inlet P.C.B. is seated properly at the locator, screw 2 screws at AC Inlet P.C.B..
6. Turn over AC Inlet P.C.B. to the solder side (Step 6).
7. Desolder black wire pin & red wire pin on AC Inlet P.C.B. (Step 7).
8. Remove the AC Inlet P.C.B. (Step 8).

To disassemble the Jupiter P.C.B. on the PANASONIC SA-AK780PH, follow these steps after completing Item 9.3 and 9.7:

1. Remove 3 screws (Step 1).
2. Remove the Jupiter Unit (Step 2). Caution: Do not misplace the Lighting Chip when remove the Jupiter Unit.
3. Release 2 catches (Step 3).
4. Slightly left up the Jupiter Cover to release from 2 locators (Step 4).
5. Desolder 4 points (Step 5).
6. Remove the Jupiter P.C.B. (Step 6).

To disassemble the Voltage Selector P.C.B. (For PH only) on the PANASONIC SA-AK780PH, follow these steps after completing Item 9.3:

1. Remove 1 screw (Step 1).
2. Detach Voltage Selector from Rear Panel as arrow shown (Step 2).
3. Desolder blue wire pin & white wire pin on the Voltage Selector P.C.B. (Step 3).
4. Remove the Voltage Selector P.C.B. (Step 4).

To disassemble the Traverse Unit Assembly on the PANASONIC SA-AK780PH, follow these steps (Caution: Disassembly of Traverse Unit Assembly in play position):

1. Release the catch and push the guide as arrows (Step 1).
2. Detach the FFC wires from the adhesive area (Step 2).
3. Remove the Traverse Unit Assembly as arrows shown (Step 3).

To assemble the Traverse Unit Assembly on the PANASONIC SA-AK780PH, follow these steps:

1. Slot the Traverse Unit Assembly into the guides as arrow shown (Step 1). Caution: Ensure the bosses fix exactly onto the guides.
2. Place down the Traverse Unit Assembly (Step 2).
3. Fix the FFC wires by using the adhesive tape (Step 3).
4. Release the catch and push the guide as arrows shown to close both grooves (Step 4).

To disassemble the CD Lid on the PANASONIC SA-AK780PH, follow these steps after completing Item 9.3 and 9.7:

1. Remove the spring as arrow shown in order of sequences (1) to (3) (Step 1). Caution: During assembling, please ensure that the spring is assembly at right position.
2. Remove CD Lid as arrow shown (Step 2).

To check and repair the Main P.C.B. in Service Position on the PANASONIC SA-AK780PH:

1. Remove Top Cabinet.
2. The Main P.C.B. can be checked as above position (Step 2).

To check and repair the Panel P.C.B., MIC P.C.B., Jupiter P.C.B. and MPort/Headphone P.C.B. in Service Position on the PANASONIC SA-AK780PH:

1. Remove Top Cabinet.
2. Remove Front Panel Assembly.
3. Remove MPort/Headphone P.C.B.
4. Remove Jupiter P.C.B..
5. Position Front Panel Assembly as diagram shown (Step 5).
6. Connect 27P FFC at the connector (CN2806) on Main P.C.B. (Step 6).
7. Connect 5P wire at the connector (CN2813) on Main P.C.B. (Step 7).
8. Connect 10P FFC at the connector (CN2807) on Main P.C.B. (Step 8).
9. Connect 30P FFC at the connector (CN3200) on Main P.C.B. (Step 9).
10. Check and repair Panel P.C.B., Mic P.C.B., Jupiter P.C.B. and MPort/Headphone P.C.B. (Step 10).

To check and repair the D-Amp P.C.B. in Service Position on the PANASONIC SA-AK780PH:

1. Remove Top Cabinet.
2. Remove CD Mechanism Unit (CR14C).
3. Remove D-Amp P.C.B..
4. Remove Fan Unit.
5. Position Mechanism Unit (CR14C) according to the diagram show (Step 5).
6. Connect 11P FFC at the connector (CN2802) on Main P.C.B. (Step 6).
7. Connect 25P FFC at the connector (CN2801) on Main P.C.B. (Step 7).
8. Extend the wire with extension wire (REXX0683-1) (8P wire from H5801 to CN5500) (Step 8).
9. Connect extension FFC (REEX0930) (17P FFC from CN5050 to CN5050) (Step 9).
10. Connect 2P wire at the connector (CN2820) on Main P.C.B. (Step 10).
11. Check and repair D-Amp P.C.B. (Step 11).

To check and repair the SMPS P.C.B. and AC Inlet P.C.B. in Service Position on the PANASONIC SA-AK780PH:

1. Remove Top Cabinet.
2. Remove CD Mechanism Unit (CR14C).
3. Remove D-Amp P.C.B..
4. Remove Fan Unit.
5. Remove AC Inlet P.C.B..
6. Remove Voltage Selector P.C.B..
7. Connect 11P FFC at the connector (CN2802) on Main P.C.B. (Step 7).
8. Connect 25P FFC at the connector (CN2801) on Main P.C.B. (Step 8).
9. Connect 2P wire at the connector (CN2820) on Main P.C.B. (Step 9).
10. Position SMPS P.C.B., AC Inlet P.C.B. & Voltage Selector as diagram show (Step 10).
11. Extend the wire with extension wire (REXX0680) (11P wire from CN2701 to CN5802) (Step 11).
12. Connect extension FFC (REEX0930) (17P FFC from CN5050 to CN5050) (Step 12).
13. Extend the wire with extension wire (REXX0683-1) (8P wire from H5801 to CN5500) (Step 13).
14. Check and repair SMPS and AC Inlet P.C.B. (Step 14).

Indication Voltage Values in the Voltage & Waveform Chart for the PANASONIC SA-AK780PH are in standard values for the unit measured by the DC electronic circuit tester (high-impedance) with the chassis taken as standard. Therefore, there may exist some errors in voltage values, depending on the internal impedance of the DC circuit tester. Circuit voltage and waveform described herein shall be regarded as reference information when probing defect point because it may differ from actual measuring value due to difference of Measuring instrument and its measuring condition and product itself.

The component part numbers for the FUSES (F1) on the PANASONIC SA-AK780PH are:

• K5D802APA008 (For PN)
• K5D802BNA005 (For PH)