Panasonic SAPM-41-P Service manual

CD Stereo System

SA-PM41P SA-PM41PC

Colour

(S)... Silver Type

ORDER NO. MD0501004C1

Specification

n Amplifier Section

Power output

10%, Total harmonic distortion

60 Hz-3 kHz, both channels driven

(Low channel) 26 W per channel (6 Ω)

3 kHz-16 kHz, both channels driven

(High channel) 29 W per channel (6 Ω)

Total Bi-Amp power 55 W per channel

Power output

10% Total harmonic distortion

1 kHz, both channels driven

(Low channel) 35 W per channel (6 Ω)

8 kHz, both channels driven

(High channel) 35 W per channel (6 Ω)

Total Bi-Amp power 70 W per channel

Output Impedance

Headphone 16Ω -32Ω

n FM Tuner Section

Frequency range 87.5 MHz - 108.0 MHz

(100 kHz steps)

87.9 MHz - 107.9 MHz (200 kHz steps)

Sensitivity 1.5 µV (IHF)

S/N 26dB 1.5 µV

ntenna terminal(s) 75 Ω (unbalanced)

n AM Tuner Section

Frequency range 520kHz - 1710 kHz (10kHz steps)

Sensitivity

S/N 20 dB (at 1000 kHz) 560 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

Erasing system AC erase 100 kHz

Tape speed 4.8 cm/s

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

NORMAL (TYPE I) 35 Hz - 14 kHz

S/N RATIO 45dB (A weighted)

Wow and flutter 0.10% (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 (33/20”/473/

Sampling frequency 44.1 kHz

Decoding 16 bit linear

Beam source / wavelength Semiconductor laser / 780 nm

Number of channels Stereo

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

Wow and flutter Below measurable limit

Digital filter 8fs

100

”)

SA-PM41 P / SA-PM41 PC

D/A converter MASH (1 bit DAC)

MP3

Bit rate 32kbps - 320kbps

Sampling frequency 32kHz, 44.1kHz, 48kHz

n Speaker Section

Type 2 way, 2 speaker system

Speaker(s)

Full Range 10 cm (4”) cone type

Tweeter 6cm(23/8”) cone type

Impedance 6 Ω

Input power

HIGH 70 W (Max)

LOW 70 W (Max)

Output sound pressure level 80 dB/W (1.0 m)

Frequency range 55 Hz - 22 kHz (-16 dB)

70 Hz - 20 kHz (-10 dB)

Dimensions (W x H x D) 128 mm x 250 mm x 222 mm

/32”x927/32”x83/4”)

Mass 1.95 kg (4.30 Ibs)

n General

Power supply AC120V,60Hz

Power consumption 130 W

Dimensions (W x H x D) 179 mm x 250 mm x 383 mm

Mass 5.24 kg (11.55 Ibs)

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.

3. The labels “HIGH” and “Low” on the rear of the speakers.

n System : SC-PM41P- S

n System : SC-PM41PC-S Music center: SA-PM41PC-S

/16”x927/32”x153/12”)

0.8 W

Music center: SA-PM41P-S

Speaker: SB-PM41P-S

CONTENTS

Page Page

1 Safety Precautions

1.1. GENERAL GUIDELINES

2 Before Repair and Adjustment

3 Protection Circuitry

4 Handling the Lead-free Solder

4.1. About lead free solder (PbF)

5 Precaution of Laser Diode

6 Handling Precautions For Traverse Deck

7 Accessories

8 Operation Procedures

9 Information on Disc & MP3

10 Assembling and Disassembling

10.1. Disassembly flow chart

10.2. Disassembly of Side Panel L & R

10.3. Disassembly of Top Cabinet

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

10.5. Disassembly of Front Panel

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

Power In P.C.B.

10.7. Disassembly of Panel P.C.B.

10.8. Disassembly of Rear Cabinet

10.9. Disassembly of Main P.C.B.

10.10. Disassembly of Transformer P.C.B.

10.11. Disassembly of Tuner Pack

10.12. Disassembly of Power P.C.B.

10.13. Disassembly of CR16 Mechanism

10.14. Replacement of C D Lid

10.15. Replacement of Cassette Lid

10.16. Replacement of the Power IC and Transistors

10.17. Procedure fo r Replacing Pinch Roller and Head Block

(Cassette Mechanism Unit)

10.18. Procedure fo r Replacing Motor, Capstan Belt A, Capstan

Belt B, and Winding Belt (Cassette Mechanism Unit)

10.19. Procedure fo r Replacing Parts on Mechanism PCB

10.20. Disassembly of CR16 Mechanism

10.21. Replacement of optical pickup unit (CD mechanism)

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

10.23. Procedure fo r removing CD loading mechanism

10.24. CR16 mechanism disassembly procedure

10.25. CR16 MECHANISM ASSEMBLY PROCEDURE

10.26. Disassembly of traverse mechanism

10.27. Handling of cassette tape jam

11 Service Positions

11.1. Checking procedure

11.2. Checking the major P.C.B

12 Self-Diagnostic Display Function

12.1. Entering into Self-Diagnostic Mode

12.2. Clearing Self-Diagnostic Memory

12.3. Displaying Self-Diagnostic Results

12.4. Error Code Table

12.5. Cassette Mechanism Self-Diagnostic Mode

12.6. Changer Reliability Test Mode

12.7. Changer Operation Checking

12.8. CR16 Mechanism Ageing Mode 55

13 Procedure for Checking Operation of Individual Parts of

Cassette Mechanism Unit

13.1. Operation Check with Cassette Tape

13.2. Operation Check without Cassette Tape

14 Measurement And Adjustments

14.1. Cassette Deck Section

15 Voltage Measurement

15.1. CD Servo P.C.B. (REPV0039A)

15.2. Main P.C.B. (REPV0062A)

15.3. Main Control P.C.B. (REPV0062A)

15.4. Deck P.C.B. (REPV0016B)

15.5. Deck Mechanism P.C.B. (REPX0321H)

15.6. CD Loading P.C.B. (REP3569A)

15.7. Power P.C.B. (REPV0038F)

15.8. Panel P.C.B. (

REPV0062A)

15.9. Transformer P.C.B. (REPV0038F)

16 Waveform Chart

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. POWER P.C.B.

20.7. TRANSFORMER P.C.B.

20.8. CD LOADING P.C.B.

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

23.1. IC302 (C2CBJG000575) MICRO PROCESSOR

23.2. IC702 (MN6627953HB) Servo processor/ Digital signal

processor/ Digital filter/ D/A converter

23.3. IC703 (BA5948FPE2) IC 4CH DRIVE

24 Troubleshooting Flowchart (CD Section Circuit)

25 Parts Location and Replacement Parts List

25.1. Deck Mechanism

25.2. CD LOading Mechanisms

25.3. Cabinet Part List

25.4. Electrical Part List

25.5. Packaging Materials & Accessories Parts List

25.6. Packaging

SA-PM41 P / SA-PM41 PC

100

102

103

104

106

108

109

111

116

120

129

SA-PM41 P / SA-PM41 PC

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.

(This “Safety Precaution” is applied only in U.S.A.)

1. Before servicing, unplug the power cord to prevent an electric shock.

2. When replacing parts, use only manufacture r’s recommende d components for safety.

3. Check the condition of the power cord. Replace if wear or damage is evident.

4. After servicing, be sure to restore the lead dress, insulation barriers, insulation papers, shields, etc.

5. Before returning the serviced equipment to the customer, be sure to make the following insulation resistance test to prevent the customer from being exposed to a shock hazard.

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 measuremen ts.

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 measuremen t 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.

1.1.3. Caution for fuse replacement

SA-PM41 P / SA-PM41 PC

2 Before Repair and Adjustment

Disconnect AC power, discharge Power Supply Capacitors C506, C507, C508, C601, C602, C600, & 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 120V, 60 Hz in NO SIGNAL mode should be ~300 mA.

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 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.

SA-PM41 P / SA-PM41 PC

4 Handling the Lead-free Solder

4.1. About lead free solder (PbF)

Distinction of PbF P.C.B.:

P.C.B.s (manufacture d) 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-PM41 P / SA-PM41 PC

5 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 manufacture r’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-PM41 P / SA-PM41 PC

6 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).

· Handling of 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. To prevent the breakdown of the laser diode, an antistatic shorting pin is inserted into the flexible board (FFC board).

3. Take care not to apply excessive stress to the flexible board (FFC board). When removing or connecting the short pin, finish the job in as short time as possible. (Fig 6.1)

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

· Grounding for electrostatic breakdown prevention

1. Work table grounding. (Fig 6.2) Use the anti-static wrist strap to discharge the static electricity from your body.

2. Work table grounding. (Fig 6.2) Put a conductive material (sheet) or steel sheet on the area where the traverse deck (optical pickup) is place, 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).

Caution when replacing the Traverse Deck

The traverse deck 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.

(Fig 6.1)

(Figs 6.2)

SA-PM41 P / SA-PM41 PC

7 Accessories

Note : Refer to Packing Materials & Accessories Parts List (Section 25.5) for the part number.

Remote Control

AC power cord

FM indoor antenna

AM loop antenna

8 Operation Procedures

SA-PM41 P / SA-PM41 PC

9 Information on Disc & MP3

SA-PM41 P / SA-PM41 PC

10 Assembling and Disassembling

“ATTENTION SERVICER”

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

10.1. Disassembly flow chart

The following chart is the procedure for disassemblin g 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-PM41 P / SA-PM41 PC

10.2. Disassembly of Side Panel L & R

Step 1 : Remove 5 screws from the side panel (R).

Step 2 : Remove 1 screws from the corner of the side panel (R).

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

Step 1 : Remove 1 screws.

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

Step 4 : Remove 5 screws from the side panel (L).

Step 5 : Remove 1 screws from the corner of the side panel (L).

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

10.3. Disassembly of Top Cabinet

· Follow the (Step 1) - (Step 6) of item 10.2.

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

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

· Follow the (Step 1) - (Step 6) of item 10.2.

· Follow the (Step 1) - (Step 3) of item 10.3.

SA-PM41 P / SA-PM41 PC

Step 1 : Remove 1 screw.

Step 2 : Release the clutch and remove the Tape Eject P.C.B..

Step 3 : Remove 4 screws.

Step 4 : Push the lever as arrow shown to remove the Deck Mechanism.

Step 1 : Detach the connector CN308.

Step 2 : Detach the connector CN505.

10.5. Disassembly of Front Panel

· Follow the (Step 1) - (Step 6) of item 10.2.

· Follow the (Step 1) - (Step 3) of item 10.3.

SA-PM41 P / SA-PM41 PC

Step 2 : Flip the Main Control P.C.B. as arrow shown.

Step 3 : Release 2 catches.

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

10.6. 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 10.2.

· Follow the (Step 1) - (Step 3) of item 10.3.

· Follow the (Step 1) - (Step 4) of item 10.5.

· Disasembly of Main Control P.C.B.

Step 3 : Detach the connector CN603A.

· Disasembly of Function P.C.B. and Power In P.C.B.

Step 1 : Remove 4 screws to remove the shield plate.

SA-PM41 P / SA-PM41 PC

Step 4 : Remove 4 screws.

Step 5 : Release the 2 clutches and remove Function P.C.B. and Power In P.C.B. together with Main Control P.C.B..

10.7. Disassembly of Panel P.C.B.

· Follow the (Step 1) - (Step 6) of item 10.2.

· Follow the (Step 1) - (Step 3) of item 10.3.

· Follow the (Step 1) - (Step 4) of item 10.5.

· Follow the (Step 1) - (Step 5) of item 10.6.

Step 2 : Remove 7 screws.

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

10.8. Disassembly of Rear Cabinet

· Follow the (Step 1) - (Step 6) of item 10.2.

· Follow the (Step 1) - (Step 3) of item 10.3.

Step 1 : Remove the volume knob.

Step 1 : Detach the connector CN303.

SA-PM41 P / SA-PM41 PC

Step 2 : Remove 9 screws altogether.

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

10.9. Disassembly of Main P.C.B.

· Follow the (Step 1) - (Step 6) of item 10.2.

· Follow the (Step 1) - (Step 3) of item 10.3.

· Follow the (Step 1) - (Step 3) of item 10.8.

Step 2 : Release the catch as arrow shown and detach the connector CN304.

Step 3 : Detach the connectors CN301 and CN302 and pull out the Main P.C.B. as arrow shown.

10.10. Disassembly of Transformer P.C.B.

Step 1 : Detach the connector CN308, CN305 and CN306.

· Follow the (Step 1) - (Step 6) of item 10.2.

· Follow the (Step 1) - (Step 3) of item 10.3.

· Follow the (Step 1) - (Step 3) of item 10.8.

Step 1 : Detach the connectors CN505 and CN506.

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

SA-PM41 P / SA-PM41 PC

10.11. Disassembly of Tuner Pack

· Follow the (Step 1) - (Step 6) of item 10.2.

· Follow the (Step 1) - (Step 3) of item 10.3.

· Follow the (Step 1) - (Step 3) of item 10.8.

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

Step 1 : Remove 4 screws.

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

10.13. Disassembly of CR16 Mechanism

· Follow the (Step 1) - (Step 6) of item 10.2.

· Follow the (Step 1) - (Step 3) of item 10.3.

· Follow the (Step 1) - (Step 4) of item 10.5.

10.12. Disassembly of Power P.C.B.

· Follow the (Step 1) - (Step 6) of item 10.2.

· Follow the (Step 1) - (Step 3) of item 10.3.

· Follow the (Step 1) - (Step 4) of item 10.5.

· Follow the (Step 1) - (Step 3) of item 10.8.

· Follow the (Step 1) - (Step 3) of item 10.9.

· Follow the (Step 1) - (Step 2) of item 10.10.

Step 1 : Remove 2 screws.

SA-PM41 P / SA-PM41 PC

Step 2 : Detach the connectors CN305 and CN306.

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

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

10.14. Replacement of CD Lid

· Follow the (Step 1) - (Step 6) of item 10.2.

· Follow the (Step 1) - (Step 3) of item 10.3.

· Follow the (Step 1) - (Step 4) of item 10.5.

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

Step 1 : Remove 2 screws 2 CD Lid supports and earth plate.

SA-PM41 P / SA-PM41 PC

Step 2 : Push the spring as arrow shown.

Step 3 : Remove the CD lid as arrow shown.

10.15. Replacement of Cassette Lid

· Follow the (Step 1) - (Step 6) of item 10.2.

· Follow the (Step 1) - (Step 3) of item 10.3.

· Follow the (Step 1) - (Step 4) of item 10.4.

Step 1 : Remove 1 screw and the damper gear.

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

SA-PM41 P / SA-PM41 PC

Step 1 : Remove 2 screws.

Step 2 : Remove 2 screws.

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

Step 4 : Remove the cassette lid as arrow shown.

10.16. Replacement of the Power IC and Transistors

Step 3 : Unsolder the Power IC500.

Step 4 : Unsolder the Transistor Q501 and Q502.

· Follow the (Step 1) - (Step 6) of item 10.2.

· Follow the (Step 1) - (Step 3) of item 10.3.

· Follow the (Step 1) - (Step 4) of item 10.5.

· Follow the (Step 1) - (Step 3) of item 10.8.

· Follow the (Step 1) - (Step 3) of item 10.9.

· Follow the (Step 1) - (Step 2) of item 10.10.

· Follow the (Step 1) - (Step 2) of item 10.12.

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

· Follow the (Step 1) - (Step 6) of Item 10.2.

· Follow the (Step 1) - (Step 3) of Item 10.3.

· Follow the (Step 1) - (Step 4) of Item 10.4.

SA-PM41 P / SA-PM41 PC

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

· Follow the (Step 1) - (Step 6) of Item 10.2.

· Follow the (Step 1) - (Step 3) of Item 10.3.

· Follow the (Step 1) - (Step 4) of Item 10.4.

· Follow the (Step 1) - (Step 5) of Item 10.17.

SA-PM41 P / SA-PM41 PC

10.19. Procedure for Replacing Parts on Mechanism PCB

· Follow the (Step 1) - (Step 6) of Item 10.2.

· Follow the (Step 1) - (Step 3) of Item 10.3.

· Follow the (Step 1) - (Step 4) of Item 10.4.

· Follow the (Step 1) - (Step 5) of Item 10.17.

10.20. Disassembly of CR16 Mechanism

· Follow the (Step 1) - (Step 6) of Item 10.2.

· Follow the (Step 1) - (Step 3) of Item 10.3.

· Follow the (Step 1) - (Step 4) of Item 10.5.

· Follow the (Step 1) - (Step 3) of Item 10.8.

· Follow the (Step 1) - (Step 5) of Item 10.13.

SA-PM41 P / SA-PM41 PC

10.21. Replacement of optical pickup unit (CD mechanism)

· Follow the (Step 1) - (Step 6) of Item 10.2.

· Follow the (Step 1) - (Step 3) of Item 10.3.

· Follow the (Step 1) - (Step 4) of Item 10.5.

· Follow the (Step 1) - (Step 3) of Item 10.8.

· Follow the (Step 1) - (Step 5) of Item 10.13.

· Follow the (Step 1) - (Step 2) of Item 10.20.

SA-PM41 P / SA-PM41 PC

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

· Follow the (Step 1) - (Step 6) of Item 10.2.

· Follow the (Step 1) - (Step 3) of Item 10.3.

· Follow the (Step 1) - (Step 4) of Item 10.5.

· Follow the (Step 1) - (Step 3) of Item 10.8.

· Follow the (Step 1) - (Step 5) of Item 10.13.

· Follow the (Step 1) - (Step 2) of Item 10.20.

· Follow the (Step 1) - (Step 12) of Item 10.21.

SA-PM41 P / SA-PM41 PC

10.23. Procedure for removing CD loading mechanism

1. Turn off by pressing power S W 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.

10.24. CR16 mechanism disassembly procedure

10.24.1. 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.

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

SA-PM41 P / SA-PM41 PC

10.24.2. Replaceme nt for the disc tray

· Follow the (Step 1) - (Step 6) of Item 10.2.

· Follow the (Step 1) - (Step 3) of Item 10.3.

· Follow the (Step 1) - (Step 4) of Item 10.5.

· Follow the (Step 1) - (Step 3) of Item 10.8.

· Follow the (Step 1) - (Step 5) of Item 10.13.

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