PANASONIC SA-AK780PN (01) PDF Document

When servicing the PANASONIC SA-AK780PN, observe the following general guidelines:

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-AK780PN:

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-AK780PN:

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.

When replacing a fuse on the PANASONIC SA-AK780PN (For PH only), replace with the same fuse type: Manufacturer: Littelfuse, Type: 233, F1, 8A 125V.

When replacing a fuse on the PANASONIC SA-AK780PN (For PN only), replace with the same fuse type: Manufacturer: Littelfuse, Type: 215, F1, T8AH 250V.

Before repairing or adjusting the PANASONIC SA-AK780PN, disconnect AC power to discharge unit AC Capacitors such as (C5700, C5701, C5703, C5704, C5705, C5706, C5707) through a 10 Ω, 10 W resistor to ground.

Caution: 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.

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

Current consumption at AC 120V, 60 Hz in NO SIGNAL mode volume minimal should be ~ 500 mA (For PN only).

The protection circuitry of the PANASONIC SA-AK780PN may have operated if either of the following conditions are noticed:

1. No sound is heard when the power is turned on.

2. Sound stops during a performance.

The function of this circuitry is to prevent circuitry damage if, for example, the positive and negative speaker connection wires are “shorted”, or if speaker systems with an impedance less than the indicated rated impedance of the amplifier are used. If this occurs, follow the procedure outlines below:

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.

Special care must be taken when handling the Optical Pickup Unit for the PANASONIC SA-AK780PN due to the laser diode:

1. Do not give a considerable shock to the optical pickup unit as it has an extremely-precise structure.

2. To prevent the laser diode from 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 the optical pickup for the PANASONIC SA-AK780PN, proceed servicing works under the working environment where grounding works is completed. Specifically, for worktable grounding:

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

For human body grounding:

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

The service manual for the PANASONIC SA-AK780PN does not contain the following information on the CD Mechanism Unit (CR14C) P.C.B.:

1. Schematic Diagram, Block Diagram and P.C.B. layout of CD Mechanism Unit (CR14C) P.C.B.

2. Parts List for individual parts of CD Mechanism Unit (CR14C).

3. Exploded View and Part List for individual parts of CD Mechanism Unit (CR14C).

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-AK780PN:

1. Micro-processor IC, IC2801 (RFKWMAK780PN)

2. EEPROM IC, IC2200 (RFKWEAK780PN)

3. FLASH ROM IC, IC701 (RFKWFAK780PN)

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

To enter Doctor Mode for the PANASONIC SA-AK780PN in CD Mode:

1. 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 firmware version for Jupiter & Microprocessor IC in Doctor Mode on the PANASONIC SA-AK780PN:

1. Press the [2] button on the remote control.

The display will show Display 1 (Jupiter/Microprocessor Version) followed by Display 2 (Microprocessor Version).

To perform the Volume Setting Check in Doctor Mode on the PANASONIC SA-AK780PN, the volume setting is checked at specific levels. During this mode, treble/bass/EQ will be set to ‘0’dB & OFF. The volume will be automatically set to its respective level (in dB).

To check volume level 50:

1. Press [7] button on remote control.

To exit Doctor Mode, press [OK] button on main unit or remote control.

To check volume level 35:

1. Press [8] button on remote control.

To exit Doctor Mode, press [OK] button on main unit or remote control.

To check volume level 0:

1. Press [9] button on remote control.

To exit Doctor Mode, press [OK] button on main unit or remote control.

To check volume level 30:

1. Press [PLAYMODE/-REPEAT] button on remote control.

To exit Doctor Mode, press [OK] button on main unit or remote control.

To check the FL segments display (All segments will light up) in Doctor Mode on the PANASONIC SA-AK780PN:

1. Press [1] button on remote control.

To check the CD OPEN operation in Doctor Mode on the PANASONIC SA-AK780PN:

1. Press [DEL] button on remote control.

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

To perform CR14 Reliability Test 1 (no retry) in Doctor Mode on the PANASONIC SA-AK780PN:

1. Press [ ], [1], [1] button on remote control.

Note: If the mechanism error occurs, it should stop the test (no retry, no recovery process). The test mode is cleared by power OFF. Reading and playback should not be done. The counter will increment by one. When reach 9999 will change to 0000.

To perform CR14 Reliability Test 2 (with retry) in Doctor Mode on the PANASONIC SA-AK780PN:

1. Press [ ], [1], [2] button on remote control.

Note: Even if the mechanism error occurs, it should retry as normal operation. The test mode is cleared by power OFF. Reading and playback should not be done. The counter will increment by one. When reach 9999 will change to 0000.

To check CR14 Inspection in Doctor Mode on the PANASONIC SA-AK780PN, follow the process:

1. Load TRAY 1 (Move to PLAY position)

2. After that, TRAY 2 is open (TRAY 1 still in LOAD condition) and close.

3. Next TRAY 3 is open (TRAY 1 still in LOAD condition) and close.

4. Then TRAY 4 is open (TRAY 1 still in LOAD condition) and close.

5. Finally TRAY 5 is open (TRAY 1 still in LOAD condition) and close.

6. Tray 1 is unloaded. (Move to the STOCK position)

7. Tray 1 is loaded. (Move to the PLAY position)

If steps 1 to 7 operate normally without any error, FL will display [CHGR_OK_]. To execute this test:

1. Press [DISC] button on remote control.

To display error codes for the CR14 changer mechanism in Doctor Mode on the PANASONIC SA-AK780PN:

1. Press [ ], [9], [4] button on remote control.

(Refer to section 6.4.1 (CD Mechanism (CR14) Error code table) for error codes.)

To perform the CD to USB Recording & Playing Inspection in Doctor Mode on the PANASONIC SA-AK780PN:

1. Press [4] button on remote control.

The inspection involves several steps:

1. Automatically change to CD.

2. Set it to VOL 0.

3. Preset EQ Set to FLAT.

4. USB Formatted.

When high-speed recording occurs, the display shows [F=MAT] then [D=ITAL].

When analog recording occurs, the display shows [ANELOG].

After an analog recording ends (TRACK 1 of ALBUM1), it switches to the USB selector. During playback of this track, it sets to VOL 50 (0dB) and starts playback. It is enabled to accept the SKIP key and the ALBUM key.

Next, it plays the track analog recorded (TRACK1 of ALBUM2). During playback of this track, it is enabled to accept the SKIP key and the ALBUM key.

To enter Service Mode for the PANASONIC SA-AK780PN in CD Mode:

Press and hold the [ ] button on the main unit for 2 seconds followed by the [ ] on the remote control for 2 seconds.

To exit Service Mode, press the [ON/OFF ] button on the main unit or remote control.

To check the records for Error Code in Service Mode on the PANASONIC SA-AK780PN:

1. Press [1] button on remote control.

To clear history, press & hold [0] for 5 seconds or more.

To check the Micro-P Version Display in Service Mode on the PANASONIC SA-AK780PN:

1. Press [2] button on remote control.

This check provides the following information:

1. System Version (Display 1)

2. Jupiter Micro-processor version (Display 1)

3. Micro-processor Version (Display 2)

To check for USB error codes in Service Mode on the PANASONIC SA-AK780PN:

1. Press [5] button on remote control.

To clear history, press & hold [0] for 5 seconds or more.

To check for CD operation (self-adjustment) in Service Mode on the PANASONIC SA-AK780PN:

1. Press [6] button on remote control.

The FL Display will show the Self Adjustment Result, such as: CLVS (1=OK, 0=NG), FLOCK (1=OK, 0=NG), and FLOCK (1=NG, 0=OK).

To reset to default setting in Service Mode on the PANASONIC SA-AK780PN:

1. Press [3] button on remote control.

The main unit key button operations for the PANASONIC SA-AK780PN are as follows:

1. Display panel

2. Disc trays

3. Standby/on switch ( /l, POWER): Press 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.

4. Track skip or search, check program content, preset channel selection, tuning function, time adjustment, timer operation, manual EQ setting

5. USB recording or pause

6. USB play or pause

7. USB port

8. Music port selection

9. AUX selection

10. Subwoofer level selection

11. Remote control signal sensor

12. Manual EQ selection

13. Music port jack

14. Headphone jack ( ) Avoid listening for prolonged periods of time to prevent hearing damage. Excessive sound pressure from earphones and headphones can cause hearing loss. Plug in only 32 Ω stereo (not included).

15. Disc tray open or close

16. Disc tray open or close

17. Track skip function

18. Disc play or pause

19. Disc direct play

20. Tuner (FM/AM) selection

21. Manual EQ’s bass control selection

22. D.BASS selection

23. Microphone volume control

24. Microphone jack

25. Stop playback, Demonstration function

26. Volume control

The remote control key operations for the PANASONIC SA-AK780PN are as follows:

3. Standby/on switch ( /l, POWER): Press 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.

4. Track skip or search, check program content, preset channel selection, tuning function, time adjustment, timer operation, manual EQ setting

5. USB recording or pause

6. USB play or pause

8. Music port selection

9. AUX selection

10. Subwoofer level selection

12. Manual EQ selection

20. Tuner (FM/AM) selection

22. D.BASS selection

27. Disc selection

28. Numeric selection

29. Delete function

30. Program function

31. Play mode function, Repeat function

32. RE-MASTER selection

33. Display function

34. CD to USB high-speed recording function

35. Clock or timer setting

36. Play timer or record timer setting

37. Sleep timer setting

38. Auto off function

39. Volume control

40. Muting function

41. Stop playback or program clear

42. Preset EQ selection

43. Dimmer function

44. Edit mode function

45. Recording mode selection

46. Album selection, Confirm selection

Regarding specific functions:

AUTO OFF: This function allows you to turn off the PANASONIC SA-AK780PN 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.

DIMMER: To dim the display panel. Press the button to activate the function. Press the button again to cancel.

MUTE: To mute the sound. Press the button to activate the function. Press the button again or adjust the volume to cancel.

To check and repair the Main P.C.B. in Service Position for the PANASONIC SA-AK780PN:

Step 1: Remove Top Cabinet.

Step 2: The Main P.C.B. can be checked as above position.

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 for the PANASONIC SA-AK780PN:

Step 1: Remove Top Cabinet.

Step 2: Remove Front Panel Assembly.

Step 3: Remove MPort/Headphone P.C.B..

Step 4: Remove Jupiter P.C.B..

Step 5: Position Front Panel Assembly as diagram shown.

Step 6: Connect 27P FFC at the connector (CN2806) on Main P.C.B..

Step 7: Connect 5P wire at the connector (CN2813) on Main P.C.B..

Step 8: Connect 10P FFC at the connector (CN2807) on Main P.C.B..

Step 9: Connect 30P FFC at the connector (CN3200) on Main P.C.B..

Step 10: Check and repair Panel P.C.B., Mic P.C.B., Jupiter P.C.B. and MPort/Headphone P.C.B..

To check and repair the D-Amp P.C.B. in Service Position for the PANASONIC SA-AK780PN:

Step 1: Remove Top Cabinet.

Step 2: Remove CD Mechanism Unit (CR14C).

Step 3: Remove D-Amp P.C.B..

Step 4: Remove Fan Unit.

Step 5: Position Mechanism Unit (CR14C) according to the diagram show.

Step 6: Connect 11P FFC at the connector (CN2802) on Main P.C.B..

Step 7: Connect 25P FFC at the connector (CN2801) on Main P.C.B..

Step 8: Extend the wire with extension wire (REXX0683-1) (8P wire from H5801 to CN5500).

Step 9: Connect extension FFC (REEX0930) (17P FFC from CN5050 to CN5050).

Step 10: Connect 2P wire at the connector (CN2820) on Main P.C.B..

Step 11: Check and repair D-Amp P.C.B..

To check and repair the SMPS P.C.B. and AC Inlet P.C.B. in Service Position for the PANASONIC SA-AK780PN:

Step 1: Remove Top Cabinet.

Step 2: Remove CD Mechanism Unit (CR14C).

Step 3: Remove D-Amp P.C.B..

Step 4: Remove Fan Unit.

Step 5: Remove AC Inlet P.C.B..

Step 6: Remove Voltage Selector P.C.B..

Step 7: Connect 11P FFC at the connector (CN2802) on Main P.C.B..

Step 8: Connect 25P FFC at the connector (CN2801) on Main P.C.B..

Step 9: Connect 2P wire at the connector (CN2820) on Main P.C.B..

Step 10: Position SMPS P.C.B., AC Inlet P.C.B. & Voltage Selector as diagram show.

Step 11: Extend the wire with extension wire (REXX0680) (11P wire from CN2701 to CN5802).

Step 12: Connect extension FFC (REEX0930) (17P FFC from CN5050 to CN5050).

Step 13: Extend the wire with extension wire (REXX0683-1) (8P wire from H5801 to CN5500).

Step 14: Check and repair SMPS and AC Inlet P.C.B..

The disassembly procedure for the Top Cabinet of the PANASONIC SA-AK780PN involves these steps:

Step 1: Remove 3 screws on each side.

Step 2: Remove 5 screws (from the Back View).

Step 3: Slightly lift the sides of Top Cabinet outwards as arrow shown.

Step 4: Push the Top Cabinet backwards as arrow shown to release the catches.

Step 5: Remove the Top Cabinet.

To disassemble the CD Mechanism Unit (CR14C) from the PANASONIC SA-AK780PN (Follow Step 1 to Step 5 of Item 9.3 first):

Step 1: Remove 1 screw.

Step 2: Detach 25P FFC at the connector (CN2801) on Main P.C.B..

Step 3: Detach 11P FFC at the connector (CN2802) on Main P.C.B..

Step 4: Release claws outwards on both sides.

Step 5: Release the CD Mechanism Unit (CR14C) from the catches & locators.

Step 6: Lift up the CD Mechanism Unit (CR14C) as arrow shown to remove CD Mechanism Unit (CR14C).

Caution: During assembling, ensure the CD Mechanism Unit (CR14C) is seated properly on the locators.

To disassemble the Rear Panel of the PANASONIC SA-AK780PN (Follow Step 1 to Step 5 of Item 9.3 first):

Step 7: Remove 2 screws.

Step 8: Remove the CD Mechanism Unit (CR14C).

If for PH only:

Step 1: Detach 2P wire at the connector (CN2810) on Main P.C.B..

Step 2: Remove 10 screws.

Step 3: Release 2 catches from the each side of the Rear Panel.

If for PN only:

Step 2: Remove 9 screws.

Step 3: Release 2 catches from the each side of the Rear Panel.

After steps 1-3 (for PH only) or steps 1-3 (for PN only) are completed:

Step 4: Slightly lift up the CD Mechanism Unit (CR14C) to release from the 2 locators.

Step 5: Detach Voltage Selector from Rear Panel as arrow shown.

Step 6: Remove the Rear Panel.

To disassemble the Fan Unit of the PANASONIC SA-AK780PN (Follow Step 1 to Step 5 of Item 9.3 and Follow Step 1 of Item 9.5):

Step 1: Release fan wire from the holder.

Step 2: Remove 1 screw.

Step 4: Slightly lift up the CD Mechanism Unit (CR14C) to release from the 2 locators.

Step 5: Remove the Rear Panel.

To disassemble the Front Panel Assembly of the PANASONIC SA-AK780PN (Follow Step 1 to Step 5 of Item 9.3):

Step 1: Detach 30P FFC at the connector (CN3200) on Main P.C.B..

Step 2: Detach 27P FFC at the connector (CN2806) on Main P.C.B..

Step 3: Detach 5P wire at the connector (CN2813) on Main P.C.B..

Step 4: Detach 10P FFC at the connector (CN2807) on Main P.C.B..

Step 5: Release claws on both sides.

Step 6: Release catches at both side.

Caution: During assembling, ensure both the claws and catches are fully catched.

Step 7: Release tabs at the bottom.

Caution: Do not exert strong force when releasing the tabs.

Step 8: Remove the Front Panel Assembly as arrow shown.

To disassemble the Mic P.C.B. from the PANASONIC SA-AK780PN (Follow Step 1 to Step 5 of Item 9.3 and Follow Step 1 to Step 8 of Item 9.7):

Step 1: Remove the Mic Volume Knob.

Step 2: Cut the tie wrap.

Caution: Remember to tie the 5P wire with tie wrap to the Front Panel as diagram shown.

Step 3: Remove 2 screws.

Step 4: Release the catch.

Step 5: Remove the Mic P.C.B..

To disassemble the Panel P.C.B. from the PANASONIC SA-AK780PN (Follow 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):

Step 1: Remove the Volume Knob.

Step 2: Remove the Track Knob.

Step 3: Remove 8 screws.

Step 4: Remove 1 screw.

Step 5: Release 8 catches.

Step 6: Lift up the Panel P.C.B. slightly.

Step 7: Detach 5P wire at the connector (CN6602) on Panel P.C.B..

Step 8: Remove the Panel P.C.B..

Caution: During assembling of Panel P.C.B., ensure that the diodes on Panel P.C.B. are in upright position.

To disassemble the Dynamic Bass Knob from the PANASONIC SA-AK780PN (Follow Step 1 to Step 5 of Item 9.3, Step 1 to Step 8 of Item 9.7, Step 1 to Step 5 of Item 9.8, and Step 1 to Step 8 of Item 9.9):

Step 1: Release 4 catches.

Step 2: Remove the Dynamic Bass Knob Assembly.

For disassembly of Dynamic Bass Knob (Step 3 and Step 4):

Step 3: Release 3 catches.

Step 4: Remove the Dynamic Bass Knob.

Caution 1: Do not misplace the Volume Gear.

Caution 2: Volume gear to align to Volume Knob & engage to Dynamic Bass Knob during assembly.

For disassembly of Dynamic Bass Button Unit (Step 1 and Step 2):

Step 1: Release 4 catches.

Step 2: Release 2 catches.

To disassemble the Memory P.C.B. from the PANASONIC SA-AK780PN (Follow Step 1 to Step 5 of Item 9.3, Step 1 to Step 8 of Item 9.7, Step 1 to Step 5 of Item 9.8, and Step 1 to Step 8 of Item 9.9):

Step 1: Release 8 catches.

Step 2: Remove the Deck Cover.

Step 3: Remove the Dynamic Bass Button Unit.

To disassemble the MPort/Headphone P.C.B. from the PANASONIC SA-AK780PN (Follow Step 1 to Step 5 of Item 9.3 and Follow Step 1 to Step 8 of Item 9.7):

Step 1: Remove 1 screw.

Step 2: Release 2 catches.

Step 3: Remove the MPort/Headphone P.C.B..

Step 4: Remove the Memory Lighting Unit.

Step 5: Release 2 catches.

Step 6: Remove the Memory P.C.B. as arrow shown.

To disassemble the CD Servo P.C.B. from the PANASONIC SA-AK780PN (Follow Step 1 to Step 5 of Item 9.3 and Follow Step 1 to Step 8 of Item 9.4):

Step 1: Upset the CD Mechanism Unit (CR14C).

Step 2: Desolder 4 solder points.

Step 3: Remove 3 screws.

Step 4: Flip over the CD Servo P.C.B..

Step 5: Detach the 16P FFC at connector (CN7001) at CD Servo P.C.B..

Step 6: Remove CD Servo P.C.B..

To disassemble the D-Amp P.C.B. & Fan from the PANASONIC SA-AK780PN (Follow Step 1 to Step 5 of Item 9.3 and Follow Step 1 to Step 6 of Item 9.4):

Disassembly of D-Amp P.C.B.:

Step 1: Remove 4 screws (from the Rear Panel).

Step 2: Detach 17P FFC at the connector (CN5050) on D-Amp P.C.B..

Step 3: Detach 8P wire at the connector (CN5500) on D-Amp P.C.B..

Step 4: Detach 2P wire at the connector (CN2820) on Main P.C.B..

Step 5: Remove 2 screws.

Step 6: Lift up the D-Amp P.C.B. together with inner chassis assembly as arrow shown.

Step 7: Place the D-Amp P.C.B. on a support block.

Step 8: Remove 3 screws.

Step 9: Lift up to remove the D-Amp P.C.B..

Caution: During assembling, ensure the D-Amp P.C.B. is seated properly on the locator of the Inner Chassis.

Disassembly of Fan Unit (Step 1 and Step 2):

Step 1: Remove 1 screw.

Step 2: Remove the Fan Unit.

To replace the Audio Digital Amp IC (IC5400) on the PANASONIC SA-AK780PN (Follow Step 1 to Step 5 of Item 9.3, Step 1 to Step 6 of Item 9.4, and Step 1 to Step 9 of Item 9.14):

Disassembly of Audio Digital Amp IC (IC5400):

Step 1: Desolder pins of Audio Digital Amp IC (IC5400) on reverse side of D-Amp P.C.B..

Step 2: Remove 1 screw.

Step 3: Remove TR Spring as arrow shown.

Step 4: Remove Audio Digital Amp IC (IC5400) from the Heatsink Unit A.

Caution: During replacement of the part, avoid touching the Heatsink, it may lead to injuries.

Assembly of Audio Digital Amp IC (IC5400):

Step 1: Mount the Audio Digital Amp IC (IC5400) on to the D-Amp P.C.B..

Step 2: Screw back TR Spring to hold the Audio Digital Amp IC (IC5400) onto the Heatsink Unit A.

Step 3: Solder the pins of Audio Digital Amp IC (IC5400).

Step 4: Use a blower to remove the minute particles after the screwing of TR Spring.

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-AK780PN (Follow Step 1 to Step 5 of Item 9.3, Step 1 to Step 6 of Item 9.4, and Step 1 to Step 9 of Item 9.14):

Disassembly of Audio Digital Amp IC (IC5000):

Step 1: Desolder pins of Audio Digital Amp IC (IC5000) on reverse side of D-Amp P.C.B..

Step 2: Remove 1 screw.

Step 3: Remove TR Spring as arrow shown.

Step 4: Remove Audio Digital Amp IC (IC5000) from the Heatsink Unit A.

Caution: During replacement of the part, avoid touching the Heatsink, it may lead to injuries.

Assembly of Audio Digital Amp IC (IC5000):

Step 1: Mount the Audio Digital Amp IC (IC5000) on to the D-Amp P.C.B..

Step 2: Screw back TR Spring to hold the Audio Digital Amp IC (IC5000) onto the Heatsink Unit A.

Step 3: Solder the pins of Audio Digital Amp IC (IC5000).

Step 4: Use a blower to remove the minute particles after the screwing of TR Spring.

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-AK780PN (Follow Step 1 to Step 5 of Item 9.3, Step 1 to Step 6 of Item 9.4, and Step 1 to Step 9 of Item 9.14):

Disassembly of Audio Digital Amp IC (IC5200):

Step 1: Desolder pins of Audio Digital Amp IC (IC5200) on reverse side of D-Amp P.C.B..

Step 2: Remove 1 screw.

Step 3: Remove TR Spring as arrow shown.

Step 4: Remove Audio Digital Amp IC (IC5200) from the Heatsink Unit A.

Caution: During replacement of the part, avoid touching the Heatsink, it may lead to injuries.

Assembly of Audio Digital Amp IC (IC5200):

Step 1: Mount the Audio Digital Amp IC (IC5200) on to the D-Amp P.C.B..

Step 2: Screw back TR Spring to hold the Audio Digital Amp IC (IC5200) onto the Heatsink Unit A.

Step 3: Solder the pins of Audio Digital Amp IC (IC5200).

Step 4: Use a blower to remove the minute particles after the screwing of TR Spring.

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. from the PANASONIC SA-AK780PN (Follow Step 1 to Step 5 of Item 9.3, Step 1 to Step 6 of Item 9.4, Step 1 to Step 4 of Item 9.7, and Step 1 to Step 6 of Item 9.14):

Step 1: Detach 11P wire at the connector (CN5802) on SMPS P.C.B..

Step 2: Detach 2P wire at the connector (CN2810) on Main P.C.B..

Step 3: Remove 2 screws at the Rear Panel.

Step 4: Remove 2 screws on at bottom chassis.

Step 5: Remove the Main P.C.B..

To disassemble the SMPS P.C.B. from the PANASONIC SA-AK780PN (Follow Step 1 to Step 5 of Item 9.3, Step 1 to Step 6 of Item 9.4, and Step 1 to Step 6 of Item 9.14):

Step 1: Detach 11P wire at the connector (CN5802) on SMPS P.C.B..

Step 2: Remove 4 screws.

Step 3: Lift up and remove the SMPS P.C.B. as arrow shown.

Step 4: Flip the SMPS P.C.B. and desolder the wire’s pin. (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 PANASONIC SA-AK780PN (Follow Step 1 to Step 5 of Item 9.3, Step 1 to Step 6 of Item 9.4, Step 1 to Step 6 of Item 9.14, and Step 1 to Step 4 of Item 9.19):

Disassembly of Switching Regulator IC (IC5701):

Step 1: Desolder pins of the Switching Regulator IC (IC5701) on the solder side of SMPS P.C.B..

Step 2: Remove 1 screw from the Switching Regulator IC (IC5701).

Step 3: Remove the Switching Regulator IC (IC5701).

Caution: During replacement of the part, avoid touching the heatsink, it may lead to injuries.

Assembly of Switching Regulator IC (IC5701):

Step 1: Apply grease to the Heatsink Unit B.

Step 2: Mount the Switching Regulator IC (IC5701) on to SMPS P.C.B..

Caution: Ensure pins of the Switching Regulator IC (IC5701) are properly seated on SMPS P.C.B..

Step 3: Solder pins of the Switching Regulator IC (IC5701) on the solder side of SMPS P.C.B..

Step 4: Screw the Switching Regulator IC (IC5701) to the Heatsink Unit B.

Caution: Ensure the Switching Regulator IC (IC5701) is tightly screwed to the Heatsink Unit B.

To replace the Rectifier Diode (D5702) on the PANASONIC SA-AK780PN (Follow Step 1 to Step 5 of Item 9.3, Step 1 to Step 6 of Item 9.4, Step 1 to Step 6 of Item 9.14, and Step 1 to Step 4 of Item 9.19):

Disassembly of Rectifier Diode (D5702):

Step 1: Desolder pins of the Rectifier Diode (D5702) on the solder side of SMPS P.C.B..

Step 2: Desolder pins of the Heatsink Unit B.

Step 3: Remove 1 screw.

Step 4: Remove the Heatsink Unit B as arrow shown.

Step 5: Remove 1 screw.

Step 6: Remove the Rectifier Diode (D5702) from the Heatsink Unit B.

Caution: During replacement of the part, avoid touching the heatsink, it may lead to injuries.

Assembly of Rectifier Diode (D5702):

Step 1: Apply grease to the Heatsink Unit B.

Step 2: Screw the Rectifier Diode (D5702) to the Heatsink Unit B.

Caution: Ensure the Rectifier Diode (D5702) is well tightened to the Heatsink Unit B.

Step 3: Mount the Heatsink Unit B & Rectifier Diode (D5702) on to SMPS P.C.B..

Caution: Ensure pins of the Rectifier Diode (D5702) is properly seated on SMPS P.C.B.

Step 4: Screw the Switch Regulator IC (IC5701) to the Heatsink Unit B.

Caution: Ensure the Heatsink Unit B is properly seated on SMPS P.C.B..

Step 5: Solder pins of the Rectifier Diode (D5702) on the solder side of SMPS P.C.B..

Step 6: Solder pins of the Heatsink Unit B on the solder side of SMPS P.C.B..

To replace the Regulator Diode (D5801) on the PANASONIC SA-AK780PN (Follow Step 1 to Step 5 of Item 9.3, Step 1 to Step 6 of Item 9.4, Step 1 to Step 6 of Item 9.14, and Step 1 to Step 4 of Item 9.19):

Disassembly of Regulator Diode (D5801):

Step 1: Desolder pins of the Regulator Diode (D5801) on the solder side of SMPS P.C.B..

Step 2: Remove 1 screw.

Step 3: Remove the Regulator Diode (D5801).

Caution: During replacement of the part, avoid touching the heatsink, it may lead to injuries.

Assembly of Regulator Diode (D5801):

Step 1: Apply grease to the Heatsink Unit C.

Step 2: Mount & screw the Regulator Diode (D5801) to the Heatsink Unit C on the SMPS P.C.B..

Caution: Ensure the Regulator Diode (D5801) is well tightened to the Heatsink Unit C.

Step 3: Solder pins of the Regulator Diode (D5801) on the solder side of SMPS P.C.B..

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 PANASONIC SA-AK780PN (Follow Step 1 to Step 5 of Item 9.3, Step 1 to Step 6 of Item 9.4, Step 1 to Step 6 of Item 9.14, and Step 1 to Step 4 of Item 9.19):

Disassembly of Regulator Diode (D5802):

Step 1: Desolder pins of the Regulator Diode (D5802) on the solder side of SMPS P.C.B..

Step 2: Remove 1 screw.

Step 3: Remove the Regulator Diode (D5802) from the Heatsink Unit C.

Caution: During replacement of the part, avoid touching the heatsink, it may lead to injuries.

Assembly of Regulator Diode (D5802):

Step 1: Apply grease to the Heatsink Unit C.

Step 2: Mount & screw the Regulator Diode (D5802) to the Heatsink Unit C on SMPS P.C.B..

Caution: Ensure the Regulator Diode (D5802) is well tightened to the heatsink unit C.

Step 3: Solder pins of the Regulator Diode (D5802) on the solder side of SMPS P.C.B..

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 PANASONIC SA-AK780PN (Follow Step 1 to Step 5 of Item 9.3, Step 1 to Step 6 of Item 9.4, Step 1 to Step 6 of Item 9.14, and Step 1 to Step 4 of Item 9.19):

Disassembly of Regulator Diode (D5803):

Step 1: Desolder pins of the Regulator Diode (D5803) on the solder side of SMPS P.C.B..

Step 2: Remove 1 screw.

Step 3: Remove the Regulator Diode (D5803) from the Heatsink Unit C.

Caution: During replacement of the part, avoid touching the heatsink, it may lead to injuries.

Assembly of Regulator Diode (D5803):

Step 1: Apply grease to the Heatsink Unit C.

Step 2: Mount & screw the regulator diode (D5803) to the Heatsink Unit C on SMPS P.C.B..

Caution: Ensure the Regulator Diode (D5803) is well tightened to the Heatsink Unit C.

Step 3: Solder pins of the Regulator Diode (D5803) on the solder side of SMPS P.C.B..

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. from the PANASONIC SA-AK780PN (Follow Step 1 to Step 5 of Item 9.3):

Step 1: Remove 1 screw.

Step 2: Release the tab at the Rear Panel as arrow show.

Step 3: Cut 2 tie wraps.

Caution: Remember to tie the red, black, blue wires with the wraps to the bottom chassis as diagram show.

Step 4: Remove 2 screws on AC Inlet P.C.B..

Step 5: Lift up AC inlet P.C.B. from bottom chassis.

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..

Step 6: Turn over AC Inlet P.C.B. to the solder side.

Step 7: Desolder black wire pin & red wire pin on AC Inlet P.C.B..

Step 8: Remove the AC Inlet P.C.B..

To disassemble the Jupiter P.C.B. from the PANASONIC SA-AK780PN (Follow Step 1 to Step 5 of Item 9.3 and Follow Step 1 to Step 8 of Item 9.7):

Step 1: Remove 3 screws.

Step 2: Remove the Jupiter Unit.

Caution: Do not misplace the Lighting Chip when remove the Jupiter Unit.

Step 3: Release 2 catches.

Step 4: Slightly left up the Jupiter Cover to release from 2 locators.

Step 5: Desolder 4 points.

Step 6: Remove the Jupiter P.C.B..

To disassemble the Voltage Selector P.C.B. (For PH only) from the PANASONIC SA-AK780PN (Follow Step 1 to Step 5 of Item 9.3):

Step 1: Remove 1 screw.

Step 2: Detach Voltage Selector from Rear Panel as arrow shown.

Step 3: Desolder blue wire pin & white wire pin on the Voltage Selector P.C.B..

Step 4: Remove the Voltage Selector P.C.B..

To disassemble the Traverse Unit Assembly from the PANASONIC SA-AK780PN (Caution: Disassembly of Traverse Unit Assembly in play position):

Step 1: Release the catch and push the guide as arrows.

Step 2: Detach the FFC wires from the adhesive area.

Step 3: Remove the Traverse Unit Assembly as arrows shown.

To assemble the Traverse Unit Assembly onto the PANASONIC SA-AK780PN:

Step 1: Slot the Traverse Unit Assembly into the guides as arrow shown.

Caution: Ensure the bosses fix exactly onto the guides.

Step 2: Place down the Traverse Unit Assembly.

Step 3: Fix the FFC wires by using the adhesive tape.

Step 4: Release the catch and push the guide as arrows shown to close both grooves.

To disassemble the CD Lid from the PANASONIC SA-AK780PN (Follow Step 1 to Step 5 of Item 9.3 and Follow Step 1 to Step 8 of Item 9.7):

Step 1: Remove the spring as arrow shown in order of sequences (1) to (3).

Caution: During assembling, please ensure that the spring is assembly at right position.

Step 2: Remove CD Lid as arrow shown.

The signal line definitions for the Voltage and Waveform Chart for the PANASONIC SA-AK780PN are:

Important safety notice notes for replacement parts on the PANASONIC SA-AK780PN:

1. Components identified by mark have special characteristics important for safety.

2. Furthermore, special parts which have purposes of fire-retardant (resistors), high quality sound (capacitors), low-noise (resistors), etc are used.

3. When replacing any of components, be sure to use only manufacturer’s specified parts shown in the parts list.

4. In case of AC rated voltage Capacitors, the part no. and values will be indicated in the Schematic Diagram.

5. REF IS FOR INDICATION ONLY.

When repairing equipment on the PANASONIC SA-AK780PN that uses Lead Free Solder (PbF), you should:

1. Use the soldering iron (more than 70W) equipped with the temperature control after setting the temperature at 350±30 degrees C (662±86°F).

The following 3 types of lead free solder are available through the service parts route for the PANASONIC SA-AK780PN:

1. RFKZ03D01K———–(0.3mm 100g Reel)

2. RFKZ06D01K———–(0.6mm 100g Reel)

3. RFKZ10D01K———–(1.0mm 100g Reel)

Ingredient: tin (Sn), 96.5%, silver (Ag) 3.0%, Copper (Cu) 0.5%, Cobalt (Co) / Germanium (Ge) 0.1 to 0.3%

The main components and P.C.B. locations inside the PANASONIC SA-AK780PN are:

The service tools and equipment recommended for the PANASONIC SA-AK780PN are:

The disassembly flow chart for the main components of the PANASONIC SA-AK780PN proceeds as follows:

The process starts with Top Cabinet (9.3). From there, it branches to:

• Mechanism Unit (CR14C) (9.4) which leads to CD Servo P.C.B. (9.13), Traverse Unit Assembly (9.28), and CD Lid (9.29).
• Rear Panel (9.5) which leads to Fan Unit (9.6) and AC Inlet P.C.B. (9.25), Voltage Selector P.C.B. (For PH only) (9.27).
• Front Panel Assembly (9.7) which is connected to Mic P.C.B. (9.8), Jupiter P.C.B. (9.26), Panel P.C.B. (9.9), Dynamic Bass Knob & Dynamic Bass Button Unit (9.10), Memory P.C.B. (9.11), MPort/Headphone P.C.B. (9.12).

The connections from these branch points lead to the circuit boards and components for replacement/checking:

• D-Amp P.C.B. & Fan (9.14) which leads to Audio Digital Amp IC replacements (9.15, 9.16, 9.17).
• SMPS P.C.B. (9.19) which leads to replacement of Switching Regulator IC (IC5701) (9.20), Rectifier Diode (D5702) (9.21), Regulator Diode (D5801) (9.22), Regulator Diode (D5802) (9.23), Regulator Diode (D5803) (9.24).
• Main P.C.B. (9.18).