Panasonic SAPM-3-EE Service manual

SA-PM3EE

Colour

(S)... Silver Type

ORDER NO. MD0602029C3

CD Stereo System

Specification

RMS OUTPUT POWER both channel driven simultaneously

10% total harmonic distortion 5.0 W per channel (6 Ω)

Output impedance

HEADPHONE 16 Ω to 32 Ω

Phone jack

Terminal Stereo, 3.5 mm

n FM Tuner Section

Frequency range 87.50 to 108.00 MHz

(50 kHz step)

Sensitivity 1.4 µV (IHF)

S/N 26 dB 1.0 µV

ntenna terminals 75 Ω (unbalanced)

Preset station FM 15 stations

AM 15 stations

n AM Tuner Section

Frequency range 522 to 1629 kHz

(9 kHz steps)

520 to 1630 kHz

(10 kHz steps)

Sensitivity

S/N 20 dB (at 999 kHz) 902 µV/m

n Cassette Deck Section

Track system 4-track, 2-channel

Heads

Record/playback Solid permalloy head

Erasure Double gap ferrite head

Motor DC servo motor

Recording system AC bias 100 kHz

Erase system AC erase 100 kHz

Tape speed 4.8 cm/s

Overall frequency response (+3 dB, -6 dB) at DECK OUT

Normal 35 Hz to 14 kHz

S/N RATIO 47 dB (A weighted)

Wow and flutter 0.09% (WRMS)

Fast-forward and rewind time Approx. 120 seconds with C-60

cassette tape

n CD Section

Disc played [8 cm or 12 cm]

(1) CD-Audio (CD-DA)

(2) CD-R/RW (CD-DA, MP3 formatted disc)

(3) MP3

Sampling frequency

CD 44.1 kHz

MP3 32 kHz, 44.1 kHz, 48 kHz

Bit rate

MP3 32 kbps to 384 kbps

Decoding 16/20/24 bit linear

Pickup

SA-PM3EE

Wavelength 785 nm

Beam source Semiconductor laser

Laser power CLASS 1

udio output (Disc)

Number of channels 2 channel

Frequency response 20 Hz to 20 kHz (+1dB, -2dB)

Wow and flutter Below measurable limit

Digital filter 8fs

D/A converter MASH (1 bit DAC)

n General

Power supply AC 230 V, 50 Hz

Power consumption 30 W

Dimensions (W x H x D) 165 x 227 x 285 mm

Mass 2.8 kg

Operating temperature range +5 to +35°C

Operation humidity range 5 to 90% RH (no condensation)

Power consumption in standby mode

Notes :

1. Specifications are subject to change without notices. Mass and dimensions are approximate.

2. Total harmonic distortion is measured by the digital spectrum analyzer.

n System : SC-PM3EE-S

Music center: SA-PM3EE-S

Speaker: SB-PM3EG-M

0.8 W

CONTENTS

Page Page

1 Safety Precautions

1.1. General Guidelines

1.2. Before Repair and Adjustment

1.3. Protection Circuitry

2 Prevention of Electro Static Discharge (ESD) to

Electrostatically Sensitive (ES) Devices

3 Precaution of Laser Diode

4 Handling Precautions For Traverse Deck

5 Handling the Lead-free Solder

5.1. About lead free solder (PbF)

6 Accessories

7 Operating Instructions Procedures

7.1. Main Unit & Remote Control Operation

7.2. Disc Information

8 Self diagnosis and special mode setting

8.1. Special Mode Table

8.2. Error Code Table

9 Assembling and Disassembling

9.1. Caution

9.2. Disassembly flow chart

9.3. Main Parts Location Diagram

9.4. Disassembly of Side Panel L & R

9.5. Disassembly of Top Cabinet Unit

9.6. Disassembly of CD Mechanism

9.7. Disassembly of CD Open/Close P.C.B.

9.8. Disassembly of Front Panel

9.9. Disassembly of Deck Mechanism

9.10. Disassembly of Panel P.C.B.

9.11. Disassembly of Tuner Extent P.C.B.

9.12. Disassembly of Transformer P.C.B.

9.13. Disassembly of Rear Panel

9.14. Disassembly of Main/Power P.C.B.

9.15. Replacement of CD Lid and CD Open Spring

9.16. Replacement of CD Damper Gear

9.17. Replacement of Cassette Lid and Cassette Open Spring

9.18. Replacement of Cassette Damper Gear

9.19. Replacement of optical pickup unit (CD mechanism)

9.20. Replacement of a traverse gear A and a traverse gear B

9.21. Procedure for Replacing Pinch Roller and Head Block

(Deck Mechanism Unit)

9.22. Procedure for Replacing Motor, Capstan Belt A, Capstan

Belt B, and Winding Belt (Deck Mechanism Unit)

9.23. Procedure for Replacing Parts on Deck Mechanism PCB

9.24. Handling of cassette tape jam

10 Service Fixture and Tools

11 Service Positions

11.1. Checking and Repairing of Main/Power P.C.B.

11.2. Checking and Repairing of Transformer P.C.B.

11.3. Checking and Repairing of CD Servo & CD Open/Close

P.C.B.

11.4. Checking and Repairing of Panel P.C.B.

11.5. Checking and Repairing of Tuner Extent P.C.B.

11.6. Checking and Repairing of Deck & Deck Mechanism

P.C.B.

12 Procedure for Checking Operation of Individual Parts of Deck

Mechanism Unit

12.1. Operation Check with Cassette Tape

12.2. Operation Check without Cassette Tape

13 Measurement And Adjustments

SA-PM3EE

13.1. Cassette Deck Section 43

14 Voltage Measurement and Waveform Chart

14.1. Voltage Measurement

14.2. Waveform

15 Wiring Connection Diagram

16 Block Diagram

17 Notes of Schematic Diagram

18 Schematic Diagram

18.1. CD Servo Circuit

18.2. Main/Power Circuit, Tuner Extent Circuit and CD

Open/Close Circuit

18.3. Panel Circuit and Transformer Circuit

18.4. Deck Circuit and Deck Mechanism Circuit

19 Printed Circuit Board

19.1. CD Servo P.C.B.

19.2. Main/Power P.C.B.

19.3. Tuner Extent P.C.B, CD Open/Close P.C.B and Panel

P.C.B.

19.4. Deck P.C.B and Deck Mechanism P.C.B.

19.5. Transformer P.C.B.

20 Illustration of IC's, Transistors and Diodes

21 Terminal Function of IC's

21.1. IC7001 (MN6627954MA) IC SERVO

PROCESSOR/DIGITAL SIGNAL PROCESSOR/DIGITAL

FILTER D/A CONVERTER

21.2. IC7002 (BA5948FPE2) IC 4CH Drive

21.3. IC803 (MN101C49GHD1) MICROPROCESSOR

22 Troubleshooting Flowchart (CD Section Circuit)

23 Exploded Views

23.1. Cabinet Parts Location

23.2. Deck Mechanism (RAA4402-1S) & Traverse Part Location

23.3. Packaging

24 Replacement Parts List

SA-PM3EE

1 Safety Precautions

1.1. General Guidelines

1. When servicing, 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, ensure that all the protective devices such as insulation barriers, insulation papers shields are properly installed.

3. After servicing, check for leakage current checks to prevent from being exposed to shock hazards.

1.1.1. Leakage Current Cold Check

1. Unplug the AC cord and connect a jumper between the two prongs on the plug.

2. Using an ohmmeter measure the resistance value, between the jumpered AC plug and each expose d metallic cabinet part on the equipment such as screwheads, connectors, control shafts, etc. When the expose d metallic part has a return path to the chassis, the reading should be between 1MΩ and 5.2Ω. When the exposed metal does not have a return path to the chassis, the reading must be

Figure 1

1.1.2. Leakage Current Hot Check (See Figure 1)

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. should the measurement is outside of the limits specified, there is a possibility of a shock hazard, and the equipment should be repaired and re-checked before it is returned to the customer.

SA-PM3EE

1.2. Before Repair and Adjustment

Disconnect AC power, discharge Power Supply Capacitors C272, C472, C501, C909, C910, C911 & C923 through a 10Ω,1W 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.

· Current consumption at AC 230 V, 50 Hz in NO SIGNAL mode should be ~250 mA.

1.3. Protection Circuitry

The protection circuitry 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.

The function of this circuitry is to prevent circuitry damage if, for example, the positive and negative speake r connec tion 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.

SA-PM3EE

2 Prevention of Electro Static Discharge (ESD) to

Electrostatically Sensitive (ES) Devices

Some semiconductor (solid state) devices can be damaged easily by electricity. Such components commonly are called Electrostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field-effect transistors and semiconductor “chip” components. The following techniques should be used to help reduce the incidence of component damage caused by electro static discharge (ESD).

1. Immediately before handlin g any semiconductor component or semiconductor-equiped 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 equiped with ES devices, place the assembly on a conductive surface such as aluminium foil, to prevent electrostatic charge build up 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 remover device. Some solder removal devices not classified as “anti-static (ESD protected)” can generate electrical charge 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 conduc tive foam, aluminium 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 installe d.

Caution

Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.

8. Minimize body 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).

SA-PM3EE

3 Precaution of Laser Diode

CAUTION:

This unit utilizes a class 1 laser.

Invisible laser radiation is emitted from the optical pickup lens.

When the unit is turned on:

1. Do not look directly into the pick up lens.

2. Do not use optical instruments to look at the pick up lens.

3. Do not adjust the preset variable resistor on the pickup lens.

4. Do not disassemble the optical pick up unit.

5. If the optical pick up is replaced, use the manufacturer’s specified replacement pick up only.

6. Use of control or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.

CAUTION!

THIS PRODUCT UTILIZES A LASER. USE OF CONTROLS OR ADJUSTMENTS OR PERFORMANCE OF PROCEDURES OTHER THAN THOSE SPECIFIED HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE.

SA-PM3EE

4 Handling Precautions For Traverse Deck

The laser diode in the traverse deck (optical pickup) may break down due to potential difference caused by static electricity of clothes or human body.

So, be careful of electrostatic breakdown during repair of the traverse deck (optical pickup).

l Handling of CD traverse deck (optical pickup)

1. Do not subject the traverse deck (optical pickup) to static electricity as it is extremely sensitive to electrical shock.

2. The short land between the No.4 (LD) and No.5 (GND) pins on the flexible board (FFC) is shorted with a solder build-up to prevent damage to the laser diode.

3. Take care not to apply excessive stress to the flexible board (FFC board) (Fig 4.1).

4. Do not turn the variable resistor (laser power adjustment). It has already been adjusted.

Fig 4.1

l Grounding for electrostatic breakdown prevention

1. Human body grounding (Fig 4.2)

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

2. Work table grounding (Fig 4.2)

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

Caution :

The static electricity of your clothes will not be grounded through the wrist strap. So, take care not to let your clothes touch the traverse deck (optical pickup).

Fig 4.2

Caution when Replacing the Optical Pickup :

The traverse has a short point shorted with solder to protect the laser diode against electrostatics breakdown. Be sure to remove the solder from the short point before making connections.

SA-PM3EE

5 Handling the Lead-free Solder

5.1. About lead free solder (PbF)

Distinction of PbF P.C.B.:

P.C.B.s (manufactured) using lead free solder will have a PbF stamp on the P.C.B.

Caution:

· Pb free solder has a higher melting point than standard solder; Typically the melting point is 50 - 70°F (30 - 40°C) higher. Please

use a high temperature soldering iron. In case of soldering iron with temperature control, please set it to 700 ± 20°F (370 ± 10°C).

· Pb free solder will tend to splash when heated too high (about 1100°F/600°C).

· W hen soldering or unsoldering, please completely remove all of the solder on the pins or solder area, and be sure to heat the

soldering points with the Pb free solder until it melts enough.

SA-PM3EE

6 Accessories

Note : Refer to Packing Materials & Accessories (Section 24) for part number.

Remote control

AC cord

FM indoor

antenna

AM loop antenna

7 Operating Instructions Procedures

7.1. Main Unit & Remote Control Operation

SA-PM3EE

7.2. Disc Information

8 Self diagnosis and special mode setting

This unit is equipped with features of self-diagnostic & special mode setting for checking the functions & reliability.

8.1. Special Mode Table

Below is the various special modes for checking:-

Item FL Display Key Operation

Mode Name Description Front Key

Self -Diagnostic

Mode

Doctor Mode To enter into Doctor

To enter into self diagnostic checking for main unit.

Mode for checking of various items and displaying EEPROM and firmware version. (For more information, refer to section 8.1.2)

Note: The microprocessor version as shown is an example. It will be revise when there is an updates.

The Check Sum of EEPROM and firmware version will be display for 1 sec.

1. Select [ ] for CD mode (Ensure no tape or CD inserted).

2. Press and hold [ seconds follow by [

To exit, press remote control.

In any mode:

1. Press [ by [4] and [7] on remote control.

To exit, press remote control.

button on main unit or

] button on main unit follow

button on main unit or

]button for 2

SA-PM3EE

FL Display Test To check the FL

CD to Tape

Recording Test

Mode

Tape Recording

and Playing

Tape Eject test To check on the tape

Volume Setting To Forced Volume

segments display (All segments will light up)

To Inspect the recording

process from CD to

TAPE for the unit.

(For more information,

refer to section 8.1.3)

To Inspect the Tape

recording and playing is

process for unit.

(For more information,

refer to section 8.1.4)

eject function.

Setting.

* ROM correction ** Firmware version No:

In doctor mode:

1. Press [DIMMER] button on remote control.

To exit, press remote control.

In doctor mode:

1. Press [4] button on remote control.

To exit, press remote control.

In doctor mode:

1. Press [5] button on remote control.

To exit, press remote control.

In doctor mode:

1. Press [6] button on remote control.

To exit, press remote control.

In doctor mode:

1. Press [7] button on remote control.

2. Press [8] button on remote control.

3. Press [9] button on remote control.

To exit, press remote control.

button on main unit or

SA-PM3EE

Item FL Display Key Operation

Mode Name Description Front Key

Traverse Test To determine the

reliability of CD unit.

In doctor Mode:

1. Press [ control.

To exit, press remote control.

], [1], [2] button on remote

button on main unit or

TPS To check FF TPS for

deck. (For more information, refer to section 8.1.5)

Cold Start To activate cold start ipon

next AC power up.

In doctor mode:

1. Press [ control.

To exit, press remote control.

In doctor mode:

1. Press [SLEEP] button on remote control.

To exit, press remote control.

8.1.1. Cassette Mechanism Self-Diagnostic Mode

Below is information of the checking of cassette deck mechanism

No. Operation Procedures Micon operation & processing

1 C-mecha Abnormal Detection shall be

executed for DECK.

2 [ ] key is pressed, after loading in a

NORMAL type cassette with the recording tab on the left side removed.

3 [ ] key is pressed, after loading a

NORMAL, CrO2, METAL type cassette with the recording tab on the right side removed.

4 [TAPE ] Key is pressed, after loading in a

NORMAL, CrO2, METAL type cassette ( cassette for TPS checking purposes and with both recording tabs intact ).

5 [REC] key is pressed, after loading in a

NORMAL type cassette ( with both recording tabs intact )

6 Self-diagnostic mode is stopped by pressing

the [n] Key.

7 To clear all the abnormalities in the memory,

press the [n] Key for more than 5 Sec while the self-diagnostic mode is stopped.

8 To cancel the self-diagnostic mode press the

Key.

Check that all DECK mechanism leaf SW is in OFF state.

FF shall be executed for 2 sec, after which STOP. Check the following. { F.REC INH SW } is OFF { HALF SW } is ON Reel pulse toggles between H & L.

REW shall be executed for 2 sec, after which STOP. Check the following. { F.REC INH SW } is ON { HALF SW } is ON Reel pulse toggles between H & L.

TPS operation is executed. Check the following. { F.REC INH SW } is ON { HALF SW } is ON TPS signal changes. After checking TPS, it shall STOP. If TPS checking is completed at TAPE END, it is considered as TPS abnormal.

REC operation shall not be executed. Check the following. { F.REC INH SW } is ON { HALF SW } is ON

LCD shall display the abnormality item code, when the STOP key is pressed, it shall display the abnormality item code in the following sequence. [ TEST H 0 1] [ TEST H 0 2] [ TEST H 0 3]

At this time, all the abnormalities item in the memory is cleared and is displayed on the LCD.[ C L E A R ] display for 1 Sec. then,[ TEST ] is displayed.

POWER is OFF.At the next POWER ON, normal operation shall be executed.

] button on remote

button on main unit or

· If RAM check error occurs during microcomputer reset, COLDSTART shall be executed and all the error memory shall be

cleared during RAM initialization.

8.1.2. EEPROM Checksum (ROM correction)

Purpose : To check for micro-processor firmware version & EEPROM check (ROM correction).

Below is the procedures for this mode.

Step 1: Enter into Doctor mode (For more information refer to section 8.1 on key operation to enter into this mode.

Step 2: Check for firmware version & EEPRO M checksum.

· W hen entering into DOCTOR MODE the firmware version & checksum of EEPROM (if applicable) will appear on FL display .

Below is information on the EEPROM IC (Rom correction) under 3 examples:

1. When EEPROM IC is detected and there is no ROM correction:

2. When EEPROM IC is detected and has ROM correction:

3. When EEPROM IC is detected and has ROM correction but NG:

SA-PM3EE

Note: Micro-processor firmware version refers to version No. (Eg.MS079_12) for micro-processor IC.

It is subject to change which would update accordingly.

· Rom correction checksum refers to the hex code that is display upon key buttons pressed if an EEPROM is loaded in the unit.

(Main P.C.B)

8.1.3. CD to Tape Recording Inspection

Purpose : To check the recording function from CD to Tape.

Below is the procedures for this mode.

Procedure :

Step 1: Enter into Doctor mode (Refer section 8.1 Special Mode Table)

Step 2: Insert CDT-018 (Ensure TOC is completed) to CD unit before proceeding.

Step 3: Press [4] button on remote control. Enter into CD to Tape Test mode. (During this mode, volume is set to [VOLUME 50], Bass & Treble is set to 0dB & EQ is switch off).

Note : When in CD to Tape Recording Test mode, the following process is perform :

a) Deck will rewind to start point (point at the start of recording) & Stop.

b) Recording begins (at constant analogue recording speed) for 3 second s & Stop.

· However, “Error” would be display if there is no tracks to access to, no tape inserted, no test CD inserted or when the tape

erasure prevention tab for FWD side is not suitable for recording.

· When in this mode, if

button is pressed the process will stops automatically .

8.1.4. Tape Recording and Playing

Purpose : To check the Tape function.

Assuming the recording to TAPE has been done in test 3, only playing TAPE is made.

Below is the procedures for this mode.

Procedure :

Step 1: Enter into Doctor mode (Refer section 8.1 Special Mode Table)

Step 2: Press [5] button on remote control. Enter into Tape recording Test mode. (During this mode, Tape function is set to automatically, volume is set to [VOLUME 50], Bass & Treble is set to 0dB & EQ is switch off).

Step 3: FWD play is made for 3 seconds after setting the above-mentioned, TAPE is stopped 3 seconds later. Tape should open.

Note : When in CD to Tape Recording Test mode, the following process is perform :

a) If the erasure prevention tab for FWD side the tape is broken, it is judged as an error and the recording operation does not start.

b) If tape stops by detecting a tape end while recording, it becomes an error.

SA-PM3EE

c) If STOP key is pressed while recording or playing, the operation shall be terminated by stopping TAPE. In this case, the doctor mode is not released.

d) DMT is output with the same timing as usual.

8.1.5. TPS Inspection

Purpose : To check the TPS.

Below is the procedures for this mode.

Procedure :

Step 1: Enter into Doctor mode (Refer section 8.1 Special Mode Table)

Step 2: Press [

· Software will start checking for existence of cassette in Deck.

· If the Deck does not contain any cassette, it shall end the test and display s the result of the test.

· The test will start by playing the Deck in forward direction for 1 sec and then FF TPS.

· If TPS signal is OK, the Deck shall be ejected. Below is information on the TPS under 3 examples.

1. If ERROR Flag is set "ERROR" shall be displayed. TPS check result shall not be shown in this case.

2. If Deck TPS check = OK

3. If Deck TPS check = NG

] button on remote control. Enter into TPS Test mode. (During this mode)

SA-PM3EE

8.2. Error Code Table

Self-Diagnosis Function provides information on any problems occuring for the unit and its respective components by displaying error codes. Thesed error code such as U**, H** and F** are stored in memory and held unless it is cleared.

The error code is automatically display after entering into self-diagnostic mode.

Error Code Diagnosis Contents Description of error Automatic FL Display Remarks

H01 MODE SW abnormal For deck mechanism unit.

H02 REC INH SW

H03 HALF SW abnormal For deck mechanism unit.

F01

F02

F15 CD REST SW

abnormal

Reel pulse abnormal

TPS abnormal

Abnormal

CD traverse position intial setting operation failsafe counter (1000 ms) waiting for REST SW toturn on. Error No. shall be clear by force or during cold start.

Press [ error.

For deck mechanism unit. Press [ error.

Press [ error.

For deck mechanism unit. Press [ error.

For CD unit (For Traverse). Press [ error.

] on main unit for next

SA-PM3EE

Error Code Diagnosis Contents Description of error Automatic FL Display Remarks

F26 Communication

between CD servo LSI and micro-p abnormal.

CD function DTMS command, after system setting, If SENSE = ´L´ cannot be detected. Memory shall contain F26 code. After Power on, CD function shall continue, error display shall be "NO DISC". Error No. shall be clear by force or cold start.

POWER AMP output abnormal

During normal operation, if DCDET becomes "L", normal POWER OFF process shall not be executed, PCONT shall be switched to "L" immediately. "GOODBYE" shall not be display but the error display F61 is displayed instead. 2 seconds after the F61 displayed, ECONO shall be set to "L" and FL display shall be turned off. The error content shall be memorized when the abnormality occurs and can be display in the C-mecha self-diagnostic mode described later.

For CD unit (For Traverse). Press [

] on main unit for next

error.

For Power Supply Related Error Detection. Press [

] on main unit for next

error.

SA-PM3EE

9 Assembling and Disassembling

9.1. Caution

“ATTENTION SERVICER”

Some chassis components may be have sharp edges. Be careful when disassembling and servicing.

1. This section describes procedures for checking the operation of the major printed circuit boards and replacing the main components.

2. For reassembly after operation checks or replacement, reverse the respective procedures. Special reassembly procedures are described only when required.

3. Select items from the following index when checks or replacement are required.

Warning:

This product uses a laser diode. Refer to “Precaution of Laser Diode”.

Below is the list of disassembly sections

· Disasse mbly of Side Panel L & R

· Disasse mbly of Top Cabinet Unit

· Disasse mbly of CD Mechanism

· Disasse mbly of CD Open/Close P.C.B.

· Disasse mbly of Front Panel

· Disasse mbly of Deck Mechanism

· Disasse mbly of Panel P.C.B.

· Disasse mbly of Tuner Extent P.C.B.

· Disasse mbly of Transformer P.C.B.

· Disasse mbly of Rear Panel

· Disasse mbly of Main/Power P.C.B.

· Replacement of CD Lid and CD Open Spring

· Replacement of CD Damper Gear

· Replacement of Cassette Lid and Cassette Open Spring

· Replacement of Cassette Damper Gear

· Replacement of Optical pickup unit (CD Mechanism)

· Replacement of a traverse gear A and a traverse gear B

· Procedure for Replacing Pinch Roller and Head Block (Deck Mechanism Unit)

· Procedure for Replacing Motor, Capstan Belt A, Capstan Belt B, and Winding Belt (Deck Mechanism Unit)

· Procedure for Replacing Parts on Deck Mechanism PCB

· Handling of cassette tape jam

SA-PM3EE

9.2. Disassembly flow chart

The following chart is the procedure for disassembling the casing and inside parts for internal inspection when carrying out the servicing.

To assemble the unit, reverse the steps shown in the chart below.

9.3. Main Parts Location Diagram

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9.4. Disassembly of Side Panel L &

· Disasse mbly of Side Panel (R)

Step 1: Remove 5 screws.

Step 2: Remove the side panel (R) as arrow shown.

9.5. Disassembly of Top Cabinet Unit

Step 1: Remove 3 screws.

· Disasse mbly of Side Panel (L)

Step 3: Remove 5 screws.

Step 4: Remove the side panel (L) as arrow shown.

Step 2: Remove 3 screws.

Step 3: Lift up the top cabinet unit, push backward as arrow shown and flip top cabinet unit sideway. (Be careful of the catch)

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Step 1: Unsolder the CD Open SW.

Step 2: Remove CD Open/Close P.C.B.

9.8. Disassembly of Front Panel

Step 4: Disconnect FFC cable (CN801).

Step 5: Detach connector (CN400).

Step 6: Remove top cabinet unit.

9.6. Disassembly of CD Mechanism

· Follow the (Step 1) - (Step 6) of Item 9.5. - Disassembly of

Top Cabine t Unit

· Follow the (Step 1) - (Step 4) of Item 9.4. - Disassembly of

Side Panel L & R

· Follow the (Step 3) - (Step 6) of Item 9.5. - Disassembly of

Top Cabine t Unit

Step 1: Detach connector (CN900B).

Step 1: Remove 4 screws.

Step 2: Remove CD mechanism. (Refer to section

9.19 for disassembly of CD mechanism unit).

9.7. Disassembly of CD Open/Close P.C.B.

· Follow the (Step 1) - (Step 6) of Item 9.5. - Disassembly of

Top Cabine t Unit

Step 2: Disconnect FFC cable (CN802 and CN804).

SA-PM3EE

Step 1: Push the lever as arrow shown to open the cassette lid.

Step 3: Release 3 claws.

Step 4: Remove the front panel as arrow shown.

9.9. Disassembly of Deck Mechanism

· Follow the (Step 1) - (Step 4) of Item 9.4. - Disassembly of

Side Panel L & R

· Follow the (Step 3) - (Step 6) of Item 9.5. - Disassembly of

Top Cabine t Unit

· Follow the (Step 1) - (Step 4) of Item 9.8. - Disassembly of

Front Panel

Step 2: Remove 4 screws.

Step 3: Remove deck mechanism.

9.10. Disassembly of Panel P.C.B.

· Follow the (Step 1) - (Step 4) of Item 9.4. - Disassembly of

Side Panel L & R

· Follow the (Step 3) - (Step 6) of Item 9.5. - Disassembly of

Top Cabine t Unit

· Follow the (Step 1) - (Step 4) of Item 9.8. - Disassembly of

Front Panel

SA-PM3EE

Step 1: Remove the volume knob.

Step 2: Remove 9 screws.

Step 3: Remove the Panel P.C.B.

9.11. Disassembly of Tuner Extent P.C.B.

· Follow the (Step 1) - (Step 6) of Item 9.5. - Disassembly of

Top Cabine t Unit

Step 1: Remove 1 screw.

Step 2: Detach connector (CN401).

Step 3: Remove the Tuner Extent P.C.B.

9.12. Disassembly of Transformer P.C.B.

· Follow the (Step 1) - (Step 6) of Item 9.5. - Disassembly of

Top Cabine t Unit

· Follow the (Step 1) of Item 9.11. - Disassembly of Tuner

Extent P.C.B.

Step 5: Remove the Transformer P.C.B as arrow shown.

9.13. Disassembly of Rear Panel

SA-PM3EE

Step 1: Remove 1 screw.

Step 2: Detach connector (CN900B).

Step 3: Detach connector (CN505B).

· Follow the (Step 1) - (Step 4) of Item 9.4. - Disassembly of

Side Panel L & R

· Follow the (Step 3) - (Step 6) of Item 9.5. - Disassembly of

Top Cabine t Unit

Step 4: Remove 4 screws.

Step 1: Remove 5 screws and remove the rear panel.

9.14. Disassembly of Main/Power P.C.B.

· Follow the (Step 1) - (Step 4) of Item 9.4. - Disassembly of

Side Panel L & R

· Follow the (Step 3) - (Step 6) of Item 9.5. - Disassembly of

Top Cabine t Unit

· Follow the (Step 2) of Item 9.8. - Disassembly of Front

Panel

SA-PM3EE

· Follow the (Step 1) - (Step 3) of Item 9.11. - Disassembly of

Tuner Extent P.C.B.

· Follow the (Step 3) of Item 9.12. - Disassembly of

Transformer P.C.B.

· Follow the (Step 1) of Item 9.13. - Disassembly of Rear

Panel

Step 2: Unsolder the terminal of Power Amp IC (IC300) and replace the component.

Step 3: Unsolder the terminal of Transistor (Q503) and replace the component.

Step 1: Remove 1 screw and remove the Main/Power P.C.B as arrow shown.

· Replacement of Power Amplifier IC

9.15. Replacement of CD Lid and CD Open Spring

· Follow the (Step 1) - (Step 6) of Item 9.5. - Disassembly of

Top Cabine t Unit

Step 1: Pull both sides CD holders to the direction of the arrows shown.

Step 1: Remove 3 screws.

Step 2: Press the CD lid as arrow shown to open.

SA-PM3EE

9.16. Replacement of CD Damper Gear

· Follow the (Step 1) - (Step 6) of Item 9.5. - Disassembly of

Top Cabine t Unit

· Follow the (Step 2) of Item 9.15. - Replacement of CD Lid

and CD Open Spring

Step 3: Remove the CD lid as arrow shown.

Step 1: Use a minus screwdriver slot into the gap and push out the dampe r gear as arrow shown. (Be careful of the catches)

9.17. Replacement of Cassette Lid and Cassette Open Spring

· Follow the (Step 1) - (Step 4) of Item 9.4. - Disassembly of

Side Panel L & R

· Follow the (Step 3) - (Step 6) of Item 9.5. - Disassembly of

Top Cabine t Unit

· Follow the (Step 1) - (Step 4) of Item 9.8. - Disassembly of

Front Panel

· Follow the (Step 1) of Item 9.9. - Disassembly of Deck

Mechanism

Step 4: Remove the CD open spring as arrow shown.

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