Panasonic SAPM-31-E, SAPM-31-EB, SAPM-31-EG Service manual

CD Stereo System

SA-PM31E SA-PM31EB SA-PM31EG

Colour

(S)... Silver Type

ORDER NO. MD0501011C2

Specification

n Amplifier Section

RMS power output

10% Total harmonic distortion

1 kHz, both channels driven

(Low channel) 41 W per channel (6Ω)

8 kHz, both channels driven

(High channel) 39 W per channel (6Ω)

Total Bi-Amp power 80 W per channel

Output Impedance

Headphone 16Ω -32Ω

n FM Tuner Section

Frequency range 87.50 MHz - 108.00 MHz

(50 kHz steps)

Sensitivity 1.02 µV (IHF)

S/N 26 dB 1.00 µV

ntenna terminal(s) 75Ω (unbalanced)

n AM Tuner Section

Frequency range 522 kHz - 1629 kHz (9 kHz

steps)

520 kHz - 1630 kHz (10 kHz

steps)

Sensitivity

S/N 20 dB (at 999 kHz) 900 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 moto

Recording system AC bias 100 kHz

Erasing system AC erase 100 kHz

Tape speed 4.8 cm/s

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

NORMAL 35 Hz - 14 kHz

S/N RATIO 42.64 dB (A weighted)

Wow and flutter 0.08% (WRMS)

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

cassette tape

n CD Section

Disc

CD, CD-R, CD-RW, MP3 8cm/12cm

Sampling frequency 44.1 kHz

Decoding 16/20/24 bit linea

Beam source/wavelength Semiconductor laser / 780 nm

Number of channels Stereo

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

Wow and flutter Below measurable limit

Digital filter 8fs

D/A converter MASH (1 bit DAC)

SA-PM31E / SA-PM31EB / SA-PM31EG

MP3

Bit rate 32 kbps - 320 kbps

Sampling frequency 32 kHz, 44.1 kHz, 48 kHz

n General

Power supply AC 230 V, 50 Hz (E/EG)

AC 230 - 240 V, 50 Hz (EB)

Power consumption 130 W

Dimensions (W x H x D) 175 mm x 254 mm x 390.7

Mass 5.63 kg

Power consumption in standby mode: 0.6 W

n System: SC-PM31E-S Music Center: SA-PM31E-S

Front speaker: SB-PM31E-M

n System: SC-PM31EB-S Music Center: SA-PM31EB-S

Front speaker: SB-PM31E-M

n System: SC-PM31EG-S Music Center: SA-PM31EG-S

Front speaker: SB-PM31E-M

Notes:

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

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

3. The labels “HIGH” and “LOW” on the rear of the speakers refer to High frequency and Low freque ncy.

CONTENTS

Page Page

1 Safety Cautions 4

1.1. GENERAL GUIDELINES

2 Caution for AC Mains Lead

3 Before Repair and Adjustment

4 Protection Circuitry

5 Handling the Lead-free Solder

5.1. About lead free solder (PbF)

6 Precaution of Laser Diode

7 Handling Precautions For Traverse Deck

8 Accessories

9 Operating Procedures

10 Information on Disc and MP3

11 Assembling and Disassembling

11.1. Disassembly flow chart

11.2. Disassembly of Side Panel L & R

11.3. Disassembly of Top Cabinet Unit

11.4. Disassembly of Deck P.C.B. and Tape Eject P.C.B.

11.5. Disassembly of Front Panel Unit

11.6. Disassembly of Main Control P.C.B., Function P.C.B. and

Power-In P.C.B.

11.7. Disassembly of Panel P.C.B.

11.8. Disassembly of Rear Cabinet

11.9. Disassembly of Main P.C.B.

11.10. Disassembly of Trans forme r P.C.B.

11.11. Disassembly of Tuner Pack

11.12. Disassembly of Powe r P.C.B

11.13. Disassembly of CR16 Mech anism

11.14. Replacement of CD Lid

11.15. Replacement of Cassette Lid

11.16. Replacement of the Power IC and Transistors.

11.17. Procedure for Repla cing Pinch Roller and Head Block

(Cassette Mechanism Unit)

11.18. Procedure for Repla cing Motor , Capstan Belt A, Capst an

Belt B, and Winding Belt (Cassette Mechanism Unit)

11.19. Procedure for Repla cing Parts on Mech anism PCB

11.20. Replacement of CD traverse deck

11.21. Replacement of optical pickup unit (CD mech anism )

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

11.23. Procedure for remov ing CD loading mech anism

11.24. CR16 mechanism disassembly proce dure

11.25. CR16 MECHANISM ASSE MBLY PROCEDUR E

11.26. Disassembly of traverse mech anism

11.27. Handling of Casse tte Tape jam

12 Service Positions

12.1. Checking procedure

12.2. Checking the major P.C.B.

13 Self-Diagnostic Display Function

13.1. Entering into Self-Diagnostic Mode

13.2. Clearing Self-Diagnostic Memory

13.3. Displaying Self-Diagnostic Results

13.4. Error Code Table

13.5. Cassette Mechanism Self-Diagnostic Mode

13.6. Changer Reliability Test Mode

13.7. Changer Operation Checking

13.8. CR16 Mechanism Ageing Mode

14 Procedure for Checking Operation of Individual Parts of

Cassette Mechanism Unit

14.1. Operation Check with Cassette Tape

14.2. Operation Check without Cassette Tape

15 Measurement And Adjustments

15.1. Tuner/CD Sections

15.2. Cassette Deck Section

16 Voltage Measurement and Waveform Chart

SA-PM31E / SA-PM31EB / SA-PM31EG

16.1. Waveform 63

17 Block Diagram

17.1. CD Servo Block

17.2. Main Block

18 Notes of Schematic Diagram

19 Schematic Diagram

19.1. CD Servo Circuit

19.2. Main Circuit

19.3. Main Control Circuit, Panel Circuit, Power-In Circuit and

Function Circuit

19.4. Deck Circuit, Deck Mechanism Circuit and Tape Eject

Circuit

19.5. Power Circuit

19.6. Transformer Circuit

19.7. CD Loading Circuit

20 Printed Circuit Board

20.1. CD Servo P.C.B.

20.2. Main P.C.B.

20.3. Main Control P.C.B. and Panel P.C.B.

20.4. Power In P.C.B., Function P.C.B. and Deck Mechanism

P.C.B.

20.5. Deck P.C.B. and Tape Eject P.C.B.

20.6. CD Loading P.C.B.

20.7. Power P.C.B.

20.8. Transformer P.C.B.

21 Wiring Connection Diagram 22 Illustration of IC 痴, Transistors and Diodes 23 Terminal Function of ICｴs

23.1. IC702 (MN6627953HB) Servo processor/ Digital signal

processor/ Digital filter/ D/A converter

23.2. IC703 (BA5948FPE2) IC 4CH DRIVE

23.3. IC302 (C2CBJG000574) MICRO PROCESSOR

24 Troubleshooting Flowchart (CD Section Circuit)

25 Parts Location and Replacement Parts List

25.1. Deck Mechanism

25.2. CD Loading Mechanism

25.3. Cabinet

25.4. Electrical Part List

25.5. Packaging Materials & Accessories Parts List

25.6. Packaging

100

102

104

105

107

112

116

124

SA-PM31E / SA-PM31EB / SA-PM31EG

1 Safety Cautions

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 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 5.2Ω. When the exposed metal does not have a return path to the chassis, the reading must be

Fig. 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.

2 Caution for AC Mains Lead

SA-PM31E / SA-PM31EB / SA-PM31EG

3 Before Repair and Adjustment

Disconnect AC power, discharge Power Supply Capacitors C506, C507, C508, C600, C601, C602, C620 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 230V, 50 Hz in NO SIGNAL mode (volume min) should be ~300 mA (E/EG).

· Current consumption at AC 230-240V, 50 Hz in NO SIGNAL mode (volume min) should be ~300 mA (EB).

4 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 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.

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).

· When 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-PM31E / SA-PM31EB / SA-PM31EG

6 Precaution of Laser Diode

Caution :

This product utilizes a laser diode with the unit turned "ON", invisible laser radiation is emitted from the pick up lens. Wavelength : 780 nm Maximum output radiation power from pick up : 100 µW/VDE Laser radiation from pick up unit is safety level, but be sure the followings:

1. Do not disassemble the optical pick up unit, since radiation from exposed laser diode is dangerous.

2. Do not adjust the variable resistor on the pick up unit. It was already adjusted.

3. Do not look at the focus lens using optical instruments.

4. Recommend not to look at pick up lens for a long time.

ACHTUNG :

Dieses Produkt enthält eine Laserdiode. Im eingeschalteten Zustand wird unsichtbare Laserstrahlung von der Lasereinheit abgestrahlt. Wellenlänge : 780nm Maximale Strahlungsleistung der Lasereinheit :100µW/VD E Die Strahlung an der Lasereinheit ist ungefährlich, wenn folgende Punkte beachtet werden:

1. Die Lasereinheit nicht zerlegen, da die Strahlung an der freigelegten Laserdiode gefährlich ist.

2. Den werkseitig justierten Einstellregler der Lasereinhit nicht verstellen.

3. Nicht mit optischen Instrumenten in die Fokussierlinse blicken.

4. Nicht über längere Zeit in die Fokussierlinse blicken.

ADVARSEL :

I dette a apparat anvendes laser.

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.

Use of Caution Labels

SA-PM31E / SA-PM31EB / SA-PM31EG

7 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 (Fig 1).

3. Take care not to apply excessive stress to the flexible

board (FPC board).

4. Do not turn the variable resistor (laser power

adjustment). It has already been adjusted.

Fig 1

l Grounding for electrostatic breakdown prevention

1. Human body grounding (Fig 2)

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

2. Work table grounding (Fig 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 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.

8 Accessories

Note : Refer to Packaging Materials & Accessories for the part number.

AC cord (EB)

AC cord (E/EG)

SA-PM31E / SA-PM31EB / SA-PM31EG

FM antenna

AM loop antenna

Antenna plug adaptor

Remote control

SA-PM31E / SA-PM31EB / SA-PM31EG

9 Operating Procedures

SA-PM31E / SA-PM31EB / SA-PM31EG

10 Information on Disc and MP3

SA-PM31E / SA-PM31EB / SA-PM31EG

11 Assembling and Disassembling

“ATTENTION SERVICER”

Some chassis components may be have sharp edges. Be careful when disassembly 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”.

ACHTUNG:

Die Lasereinheit nicht zerlegen. Die Lasereinheit darf nur gegen eine vom Hertsteller spezifizierte Einheit ausgetauscht werden.

11.1. 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.

SA-PM31E / SA-PM31EB / SA-PM31EG

11.2. Disassembly of Side Panel L & R

Step 1 : Remove 5 screws.

Step 2 : Remove 1 screw.

Step 3 : Remove the side panel as arrow shown (Be careful of the catches).

Step 1 : Remove 1 screw.

Step 2 : Lift up the top cabinet as arrow shown (Be careful of the catches).

Step 4 : Remove 5 screws.

Step 5 : Remove 1 screw.

Step 6 : Remove the side panel as arrow shown (Be careful of the catches).

11.3. Disassembly of Top Cabinet Unit

· Follow the (Step 1) - (Step 6) of Item 11.2.

Step 3 : Place the top cabinet as shown and detach connector CN1305.

11.4. Disassembly of Deck P.C.B. and Tape Eject P.C.B.

· Follow the (Step 1) - (Step 6) of Item 11.2.

· Follow the (Step 1) - (Step 3) of Item 11.3.

SA-PM31E / SA-PM31EB / SA-PM31EG

Step 1 : Remove 1 screw.

Step 2 : Release the clutch.

Step 3 : Remove 4 screws.

Step 4 : Push the lever as arrow shown to open the cassette lid and remove the Deck Mechanism Unit.

Step 1 : Detach the connector CN308.

Step 2 : Detach the connector CN505.

11.5. Disassembly of Front Panel Unit

· Follow the (Step 1) - (Step 6) of Item 11.2.

· Follow the (Step 1) - (Step 3) of Item 11.3.

SA-PM31E / SA-PM31EB / SA-PM31EG

Step 2 : Release 2 clutches and remove both Function P.C.B. and Power-In P.C.B.

· Disassembly of Main Control P.C.B.

Step 3 : Release 2 catches.

Step 4 : Release the catch at the bottom cabinet and remove the front panel unit as arrows shown.

11.6. Disassembly of Main Control P.C.B., Function P.C.B. and Power-In P.C.B.

· Follow the (Step 1) - (Step 6) of Item 11.2.

· Follow the (Step 1) - (Step 3) of Item 11.3.

· Follow the (Step 1) - (Step 4) of Item 11.5.

· Disassembly of Function P.C.B. and Power-In P.C.B.

Step 3 : Remove 2 screws to remove the shield plate.

Step 4 : Remove 2 screws and flip the Main Control P.C.B. as arrow shown.

Step 5 : Detach the connector CN603A.

Step 1 : Remove 5 screws.

11.7. Disassembly of Panel P.C.B.

· Follow the (Step 1) - (Step 6) of Item 11.2.

· Follow the (Step 1) - (Step 3) of Item 11.3.

· Follow the (Step 1) - (Step 4) of Item 11.5.

· Follow the (Step 1) - (Step 5) of Item 11.6.

SA-PM31E / SA-PM31EB / SA-PM31EG

Step 1 : Remove the volume knob.

Step 2 : Remove 7 screws.

Step 3 : Release 3 clutches and remove the Panel P.C.B. as arrow shown.

Step 1 : Detach the connector CN303.

Step 2 : Remove 9 screws.

Step 3: Remove the rear cabinet as arrows shown (Be careful of the catches).

11.9. Disassembly of Main P.C.B.

11.8. Disassembly of Rear Cabinet

· Follow the (Step 1) - (Step 6) of Item 11.2.

· Follow the (Step 1) - (Step 3) of Item 11.3.

· Follow the (Step 1) - (Step 6) of Item 11.2.

· Follow the (Step 1) - (Step 3) of Item 11.3.

· Follow the (Step 1) - (Step 3) of Item 11.8.

SA-PM31E / SA-PM31EB / SA-PM31EG

Step 1 : Detach connectors CN308, CN305 and CN306 .

Step 1 : Detach the connectors CN505 and CN506.

Step 2 : Detach the connectors CN304 (pull the catch as arrow shown), CN301 and CN302 and pull out the Main P.C.B as arrow shown.

11.10. Disassembly of Transformer P.C.B.

· Follow the (Step 1) - (Step 6) of Item 11.2.

· Follow the (Step 1) - (Step 3) of Item 11.3.

· Follow the (Step 1) - (Step 3) of Item 11.8.

Step 2 : Remove 4 screws and pull out the Transformer P.C.B. as arrow shown.

11.11. Disassembly of Tuner Pack

· Follow the (Step 1) - (Step 6) of Item 11.2.

· Follow the (Step 1) - (Step 3) of Item 11.3.

· Follow the (Step 1) - (Step 3) of Item 11.8.

Step 1 : Detach the connector CN101 and remove the tuner pack as arrow shown.

11.12. Disassembly of Power P.C.B

· Follow the (Step 1) - (Step 6) of Item 11.2.

· Follow the (Step 1) - (Step 3) of Item 11.3.

· Follow the (Step 1) - (Step 4) of Item 11.5.

· Follow the (Step 1) - (Step 3) of Item 11.8.

· Follow the (Step 1) - (Step 2) of Item 11.9.

· Follow the (Step 1) - (Step 2) of Item 11.10.

SA-PM31E / SA-PM31EB / SA-PM31EG

Step 1 : Remove 2 screws.

Step 1 : Remove 4 screws.

Step 2 : Remove the Power P.C.B. as arrow shown (be careful of the catch).

11.13. Disassembly of CR16 Mechanism

· Follow the (Step 1) - (Step 6) of Item 11.2.

· Follow the (Step 1) - (Step 3) of Item 11.3.

· Follow the (Step 1) - (Step 4) of Item 11.5.

Step 2 : Detach the connectors CN305 and CN306.

Step 3 : Remove the tape which used to secure the FFC connectors.

SA-PM31E / SA-PM31EB / SA-PM31EG

Step 1 : Remove 2 screws and the 2 CD lid supports.

Step 4 : Release the catches and remove the middle block as arrow shown.

Step 5 : Remove 2 screws and remove the CD Mechanism Unit from the bottom chassis.

Step 2 : Push the spring as arrow shown.

11.14. Replacement of CD Lid

· Follow the (Step 1) - (Step 6) of Item 11.2.

· Follow the (Step 1) - (Step 3) of Item 11.3.

· Follow the (Step 1) - (Step 4) of Item 11.5.

Step 3 : Remove the CD lid as arrow shown.

11.15. Replacement of Cassette Lid

· Follow the (Step 1) - (Step 6) of Item 11.2.

· Follow the (Step 1) - (Step 3) of Item 11.3.

· Follow the (Step 1) - (Step 4) of Item 11.4.

SA-PM31E / SA-PM31EB / SA-PM31EG

Step 1 : Remove 1 screw and the damper gear.

Step 2 : Remove the cassette open spring as arrows shown in order.

Step 3 : Pull both sides’ cassette holders to the direction of the arrows shown.

Step 4 : Remove the cassette lid as arrow shown.

SA-PM31E / SA-PM31EB / SA-PM31EG

11.16. Replacement of the Power IC and Transistors.

· Follow the (Step 1) - (Step 6) of Item 11.2.

· Follow the (Step 1) - (Step 3) of Item 11.3.

· Follow the (Step 1) - (Step 3) of Item 11.8.

· Follow the (Step 1) - (Step 2) of Item 11.9.

· Follow the (Step 1) - (Step 2) of Item 11.10.

· Follow the (Step 1) - (Step 2) of Item 11.12.

Step 1 : Remove 2 screws.

Step 2 : Remove 2 screws.

Step 3 : Unsolder the Power IC500.

Step 4 : Unsolder the Transistors Q501 and Q502.

SA-PM31E / SA-PM31EB / SA-PM31EG

11.17. Procedure for Replacing Pinch Roller and Head Block (Cassette Mechanism Unit)

· Follow the (Step 1) - (Step 6) of Item 11.2.

· Follow the (Step 1) - (Step 3) of Item 11.3.

· Follow the (Step 1) - (Step 4) of Item 11.4.

11.18. Procedure for Replacing Motor, Capstan Belt A, Capstan Belt B, and Winding Belt (Cassette Mechanism Unit)

· Follow the (Step 1) - (Step 6) of Item 11.2.

· Follow the (Step 1) - (Step 3) of Item 11.3.

· Follow the (Step 1) - (Step 4) of Item 11.4.

· Follow the (Step 1) - (Step 4) of Item 11.17.

SA-PM31E / SA-PM31EB / SA-PM31EG

11.19. Procedure for Replacing Parts on Mechanism PCB

· Follow the (Step 1) - (Step 6) of Item 11.2.

· Follow the (Step 1) - (Step 3) of Item 11.3.

· Follow the (Step 1) - (Step 4) of Item 11.4.

· Follow the (Step 1) - (Step 5) of Item 11.17.

11.20. Replacement of CD traverse deck

· Follow the (Step 1) - (Step 6) of Item 11.2.

SA-PM31E / SA-PM31EB / SA-PM31EG

· Follow the (Step 1) - (Step 3) of Item 11.3.

· Follow the (Step 1) - (Step 4) of Item 11.5.

· Follow the (Step 1) - (Step 5) of Item 11.13.

11.21. Replacement of optical pickup unit (CD mechanism)

· Follow the (Step 1) - (Step 6) of Item 11.2.

· Follow the (Step 1) - (Step 3) of Item 11.3.

· Follow the (Step 1) - (Step 4) of Item 11.5.

· Follow the (Step 1) - (Step 5) of Item 11.13.

· Follow the (Step 1) - (Step 2) of Item 11.20.

SA-PM31E / SA-PM31EB / SA-PM31EG

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

· Follow the (Step 1) - (Step 6) of Item 11.2.

· Follow the (Step 1) - (Step 3) of Item 11.3.

· Follow the (Step 1) - (Step 4) of Item 11.5.

· Follow the (Step 1) - (Step 5) of Item 11.13.

· Follow the (Step 1) - (Step 2) of Item 11.20.

· Follow the (Step 1) - (Step 12) of Item 11.21.

SA-PM31E / SA-PM31EB / SA-PM31EG

11.23. Procedure for removing CD loading mechanism

1. Turn off by pressing power SW in the body.

2. Unplug AC power cord after the indication of [GOOD-BYE],

then disassemble the body.

3. Disassemble the body, and take out CD loading mechanism.

4. Perform disassembly according to the following procedure for disassembly.

11.24. CR16 mechanism disassembly procedure

11.24.1. Gear for servicing information

· This unit has a gear which used for checking items (open/close of disc tray, up/down operation of traverse unit by manually) when servicing. (For gear information, that is described on the items for disassembly procedures.)

· For preparation of gear (for servicing), perform the procedures as follows.

· In case of re-servicing the same set, the “ gear for servicing”

may be took off because it had been used. So, the “gear for servicing” must be stored.

1. Remove the gear attached to top cover of CD loading mechanism.

SA-PM31E / SA-PM31EB / SA-PM31EG

2. Insert the hexgonal wrench (2.5mm) into the gear.

11.24.2. Replacement for the disc tray

· Follow the (Step 1) - (Step 6) of Item 11.2.

· Follow the (Step 1) - (Step 3) of Item 11.3.

· Follow the (Step 1) - (Step 4) of Item 11.5.

· Follow the (Step 1) - (Step 5) of Item 11.13.

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