Panasonic SAPM-38-PP Service manual

CD Stereo System

Model No. SA-PM38PP

Product Color: (K)...Black Type

PSG0903001CE

Notes: This model’s CD mechanism unit is DLS6C. Please refer to the Original Service Manual (Order No. MD0803034CE) for this mechanism.

TABLE OF CONTENTS

PAGE PAGE

1 Safety Precautions----------------------------------------------- 3

1.1. General Guidelines---------------------------------------- 3

1.2. Before Repair and Adjustment------------------------- 4

1.3. Protection Circuitry ---------------------------------------- 4

1.4. Safety Part Information----------------------------------- 4

2 Warning-------------------------------------------------------------- 5

2.1. Prevention of Electro Static Discharge (ESD) to Electrostatically Sensitive (ES) Devices---------- 5

2.2. Precaution of Laser Diode------------------------------- 6

2.3. Service caution based on Legal restrictions-------- 7

2.4. Handling Precaution for Traverse Unit --------------- 8

3 Service Navigation----------------------------------------------10

3.1. Service Information-------------------------------------- 10

4 Specifications ---------------------------------------------------- 11 5 Location of Controls and Components------------------ 12

5.1. Main Unit Key Button Operations -------------------- 12

5.2. Remote Control Key Button Operations------------ 12

6 Operating Instructions ---------------------------------------- 13

6.1. Disc Information ------------------------------------------ 13

7 Self diagnosis and special mode setting --------------- 14

7.1. Service Mode Summary Table------------------------ 14

7.2. Service Mode Table ------------------------------------- 15

7.3. Error Code Table ----------------------------------------- 18

8 Troubleshooting Guide --------------------------------------- 19

9 Service Fixture & Tools --------------------------------------- 20

10 Disassembly and Assembly Instructions---------------21

10.1. Disassembly flow chart --------------------------------- 22

10.2. Main Parts Location Diagram ------------------------- 23

10.3. Disassembly of Top Cabinet Assembly------------- 24

10.4. Disassembly of Headphone P.C.B. ------------------ 25

10.5. Disassembly of iPod P.C.B.---------------------------- 26

10.6. Disassembly of Front Panel Assembly -------------26

10.7. Disassembly of USB P.C.B. --------------------------- 27

10.8. Disassembly of Panel P.C.B.-------------------------- 28

10.9. Disassembly of FL Window---------------------------- 29

10.10. Disassembly of Centre Ornament ------------------- 30

10.11. Disassembly of CD Lid----------------------------------30

10.12. Disassembly of CD Mechanism Unit (DLS6C) --- 31

10.13. Disassembly of Power P.C.B. ------------------------- 32

10.14. Replacement of Power Amp IC (IC5101) ---------- 33

10.15. Disassembly of Main P.C.B. --------------------------- 34

10.16. Disassembly of Fan Unit -------------------------------36

10.17. Disassembly of Transformer P.C.B. ----------------- 37

10.18. Replacement of Transistor (Q5901)----------------- 39

10.19. Disassembly of CD Servo P.C.B.--------------------- 40

11 Disassembly and Assembly of Traverse Unit --------- 42

11.1. Disassembling Procedures ---------------------------- 42

11.2. Assembling Procedure---------------------------------- 43

12 Service Position ------------------------------------------------- 45

12.1. Checking & Repairing USB P.C.B.------------------- 45

12.2. Checking & Repairing Panel P.C.B. ----------------- 47

12.3. Checking & Repairing CD Servo P.C.B.------------ 48

12.4. Checking & Repairing Power P.C.B. ---------------- 49

12.5. Checking & Repairing Transformer P.C.B.--------- 50

12.6. Checking & Repairing Main P.C.B. ------------------ 51

13 Voltage Measurement & Waveform Chart--------------- 52

13.1. USB P.C.B.-------------------------------------------------52

13.2. CD SERVO P.C.B. ---------------------------------------53

13.3. MAIN P.C.B. (1/2) ---------------------------------------- 54

13.4. MAIN P.C.B. (2/2) ---------------------------------------- 55

13.5. PANEL P.C.B. ---------------------------------------------56

13.6. POWER P.C.B. ------------------------------------------- 56

13.7. TRANSFORMER P.C.B.--------------------------------56

13.8. Waveform Chart ------------------------------------------ 57

14 Illustration of IC’s, Transistors and Diodes ------------ 58 15 Overall Simplified Block for PM38------------------------- 59 16 Block Diagram --------------------------------------------------- 60

16.1. CD SERVO BLOCK DIAGRAM ---------------------- 60

16.2. MAIN(1/2)/ PANEL/TRANSFORMER BLOCK DIAGRAM-------------------------------------------------- 61

16.3. MAIN(2/2)/ HEADPHONE/ iPod/ USB BLOCK DIAGRAM-------------------------------------------------- 62

17 Wiring Connection Diagram --------------------------------- 63 18 Schematic Diagram Notes -----------------------------------64 19 Schematic Diagram---------------------------------------------65

19.1. CD SERVO CIRCUIT -----------------------------------65

19.2. MAIN CIRCUIT (1/4) ------------------------------------ 66

19.3. MAIN CIRCUIT (2/4) ------------------------------------ 67

19.4. MAIN CIRCUIT (3/4) ------------------------------------ 68

19.5. MAIN CIRCUIT (4/4) ------------------------------------ 69

19.6. PANEL CIRCUIT and HEADPHONE CIRCUIT---70

19.7. USB CIRCUIT--------------------------------------------- 71

19.8. iPod CIRCUIT and POWER CIRCUIT-------------- 72

19.9. TRANSFORMER CIRCUIT----------------------------73

20 Printed Circuit Board ------------------------------------------ 74

20.1. CD SERVO P.C.B. and TRANSFORMER P.C.B. ------------------------------------------------------- 74

20.2. MAIN P.C.B.----------------------------------------------- 75

20.3. PANEL P.C.B., HEADPHONE P.C.B. and POWER P.C.B. ------------------------------------------- 76

20.4. iPod P.C.B. and USB P.C.B. -------------------------- 77

21 Terminal Function of IC’s ------------------------------------ 78

21.1. IC7001 (MN6627954AMA) IC SERVO PROCESSOR -------------------------------------------- 78

21.2. IC7002 (BA5948FPE2) IC 4CH Drive -------------- 79

21.3. IC800 (RFKWMPM38EG) IC MICROPROCESSOR -------------------------------------------- 79

22 Exploded View and Replacement Parts List----------- 81

22.1. Exploded View and Mechanical replacement Parts List--------------------------------------------------- 81

22.2. Electrical Replacement Parts List ------------------- 85

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, 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.

(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 manufacturer’s recommended 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. 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. When the exposed metal does not have a return path to the chas-

sis, the reading must be

1.1.2. Leakage Current Hot Check

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.

Figure. 1

1.2. Before Repair and Adjustment

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 120V, at 60Hz in NO SIGNAL mode (at volume min in FM Tuner mode) should be ~150 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 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.

1.4. Safety Part Information

Safety Parts List:

There are special components used in this equipment which are important for safety. These parts are marked by in the Schematic Diagrams, Exploded View & Replacement Parts List. It is essential that these critical parts should be replaced with manufacturer’s specified parts to prevent shock, fire or other hazards. Do not modify the original design without permission of manufacturer.

Table 1

Safety Ref. No. Part No. Part Name & Description Remarks

301 RAEX0190Z-V TRV UNIT (W/O SERVO P.C.B.) (RTL)

A2 K2CB2CB00021 AC CORD

A3 RQTX0192-P O/I BOOK

A7 J0KG00000037 AC CLAMP FILTER

PCB7 REPX0708F TRANSFORMER P.C.B (RTL)

L5901 ELF15N035AN LINE FILTER

T5901 G4CYBYY00025 MAIN TRANSFORMER

T5902 G4C2AAD00004 SUB TRANSFORMER

Z5901 ERZVA5Z471 ZENER

F5901 K5D162APA008 FUSE

RL5901 K6B1AEA00003 RELAY

FP5901 K5G502AA0002 FUSE PROTECTOR

JK5901 K2AB2B000007 AC INLET

2 Warning

2.1. Prevention of Electro Static Discharge (ESD) to Electrostatically Sensitive (ES) Devices

Some semiconductor (solid state) devices can be damaged easily by static 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 electrostatic discharge (ESD).

1. Immediately before handling 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 sufficient to damage ES devices.

5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ES devices.

6. Do not remove a replacement ES device from its protective package until immediately before you are ready to install it. (Most replacement ES devices are packaged with leads electrically shorted together by conductive foam, 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 installed.

Caution :

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

8. Minimize bodily motions when handling unpackaged replacement ES devices. (Otherwise harmless motion such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity (ESD) suf-

ficient to damage an ES device).

2.2. Precaution of Laser Diode

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.

Caution:

This product utilizes a laser diode with the unit turned "on", invisible laser radiation is emitted from the pickup lens. Wavelength: 785 nm (CD) Maximum output radiation power from pickup: 100 μW/VDE Laser radiation from the pickup unit is safety level, but be sure the followings:

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

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

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

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

2.3. Service caution based on Legal restrictions

2.3.1. General description about Lead Free Solder (PbF)

The lead free solder has been used in the mounting process of all electrical components on the printed circuit boards used for this equipment in considering the globally environmental conservation.

The normal solder is the alloy of tin (Sn) and lead (Pb). On the other hand, the lead free solder is the alloy mainly consists of tin (Sn), silver (Ag) and Copper (Cu), and the melting point of the lead free solder is higher approx.30 degrees C (86°F) more than that of the normal solder.

Definition of PCB Lead Free Solder being used

The letter of “PbF” is printed either foil side or components side on the PCB using the lead free solder. (See right figure)

Service caution for repair work using Lead Free Solder (PbF)

• The lead free solder has to be used when repairing the equipment for which the lead free solder is used. (Definition: The letter of “PbF” is printed on the PCB using the lead free solder.)

• To put lead free solder, it should be well molten and mixed with the original lead free solder.

• Remove the remaining lead free solder on the PCB cleanly for soldering of the new IC.

• Since the melting point of the lead free solder is higher than that of the normal lead solder, it takes the longer time to melt the lead free solder.

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

Recommended Lead Free Solder (Service Parts Route.)

• The following 3 types of lead free solder are available through the service parts route. RFKZ03D01K-----------(0.3mm 100g Reel) RFKZ06D01K-----------(0.6mm 100g Reel) RFKZ10D01K-----------(1.0mm 100g Reel)

Note

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

2.4. Handling Precaution for Traverse Unit

The laser diode in the optical pickup unit may break down due to static electricity of clothes or human body. Special care must be taken avoid caution to electrostatic breakdown when servicing and handling the laser diode in the traverse unit.

2.4.1. Cautions to Be Taken in Handling the Optical Pickup Unit

The laser diode in the optical pickup unit may be damaged due to electrostatic discharge generating from clothes or human body. Special care must be taken avoid caution to electrostatic discharge damage when servicing the laser diode.

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

2. To prevent the laser diode from the electrostatic discharge damage, the flexible cable of the optical pickup unit removed should be short-circuited with a short pin or a clip.

3. The flexible cable may be cut off if an excessive force is applied to it. Use caution when handling the flexible cable.

4. The antistatic FPC is connected to the new optical pickup unit. After replacing the optical pickup unit and connecting the flexible cable, cut off the antistatic FPC.

2.4.2. Grounding for electrostatic breakdown prevention

Some devices such as the CD player use the optical pickup (laser diode) and the optical pickup will be damaged by static electricity in the working environment. Proceed servicing works under the working environment where grounding works is completed.

2.4.2.1. Worktable grounding

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

2.4.2.2. Human body grounding

1. Use the anti-static wrist strap to discharge the static electricity form your body (Figure 2).

Figure 2

3 Service Navigation

3.1. Service Information

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

If the circuit is changed or modified, this information will be followed by supplement service manual to be filed with original service manual.

1. CD Mechanism Unit:

• This model uses CD Mechanism Unit (DLS6C).

• This service manual does not contain the following information on CD Mechanism Unit (DLS6C).

- CD Mechanism Unit P.C.B..

- Parts List for individual parts of CD Mechanism Unit (DLS6C).

- Exploded View and Part List for individual parts of CD Mechanism Unit (DLS6C). Please refer to original service manual (Order No. MD0803034CE).

2. Micro-processor:

• Micro-processor IC, (IC800) is supplied as assembled part (RFKWMPM38EG).

4 Specifications

Q Amplifier Section RMS Output Power Stereo Mode Front Ch (both ch driven) 20 W per channel (4 Ω),

FTC Output Power Stereo Mode Front Ch (both ch driven) 15 W per channel (4 Ω),

60 Hz to 20 kHz, 10% THD

Phone jack Terminal Stereo, 3.5 mm (1/8”) Q Tuner Section Preset station FM 30 stations

Frequency Modulation (FM) Frequency range 87.9 MHz to 107.9 MHz

Antenna terminals 75 Ω (unbalanced) Amplitude Modulation (AM) Frequency range 520 kHz to 1710 kHz (10 kHz

Q USB Section Supported audio file format MP3 (*.mp3) Maximum port power 500 mA Q CD Section Disc played [8 cm (3”) or 12 cm (5”)]

(1) CD-Audio (CD-DA) (2) CD-R/RW (CD-DA, MP3) (3) MP3

Pickup Wavelength 785 nm Laser power CLASS I (CD) Audio output (Disc) Number of channels FL, FR, 2 channel Q General Power supply AC 120 V, 60 Hz Power consumption 70 W Dimensions (W x H x D) 153 mm x 226 mm x 292 mm

(6 1/32” x 8 29/32” x 11 1/2”)

Mass 2.5 kg (5.5 lbs.) Operating temperature range 0°C to +40°C (+32°F to +104°F) Operating humidity range 35% to 80 % RH (no condensa-

Power consumption in standby mode 0.35 W (approx)

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. Q System : SC-PM38PP-K Music center: SA-PM38PP-K

Speaker: SB-PM48EG-KC

1 kHz, 10% THD

AM 15 stations

(200 kHz step)

87.5 MHz to 108.0 MHz (100 kHz step)

step)

tion)

5 Location of Controls and Components

5.1. Main Unit Key Button Operations

5.2. Remote Control Key Button Operations

6 Operating Instructions

6.1. Disc Information

7 Self diagnosis and special mode setting

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

7.1. Service Mode Summary Table

The service modes can be activated by pressing various button combination on the main unit and remote control unit. Below is the summary for the various modes for checking:

Player buttons Remote control unit buttons Application Note

[4], [7] To Enter into Doctor Mode for vari-

ous checking

Player buttons Remote control unit buttons Mode Name Note

Note : Applicable in Doctor Mode [DIMMER] FL Display Test (Refer to the section “7.2.2 service

[7] VOLUME setting (50dB) (Refer to the section “7.2.2 service

[8] VOLUME setting (29dB) (Refer to the section “7.2.2 service

[9] VOLUME setting (0dB) (Refer to the section “7.2.2 service

[ ], [1], [1]

[ ], [1], [2]

[ ], [1], [3]

[SLEEP] Cold Start (Refer to the section “7.2.2 service

[2] USB Test Mode (Refer to the section “7.2.2 service

CD Loading Test Mode (DLS6C) (Refer to the section “7.2.2 service

CD Traverse Unit Test Mode (DLS6C)

CD Combination Test Mode (DLS6C)

(Refer to the section “7.2.1 Service Mode Table 1.)

mode Table 2 for more information.)

mode Table 2 for more information.) (Refer to the section “7.2.2 service mode Table 2 for more information.) (Refer to the section “7.2.2 service mode Table 2 for more information.)

mode Table 2 for more information.)

7.2. Service Mode Table

Below is the various special modes for checking:-

7.2.1. Service Mode Table 1

Item FL Display Key Operation

Mode Name Description Front Key

Self -Diagnostic Mode To enter into self diagnostic

checking for main unit.

Doctor Mode To enter into Doctor Mode

for checking of various items and displaying EEPROM and firmware version.

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

FL Display sequence Display 1 → 2

(Display 1)

Checksum : (Condition 1)

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

2. Press and hold [ ]button for 2 seconds follow by

[].

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

In CD mode:

1. Press [ ] button on main unit follow by [4] and [7] on remote control.

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

(a) If there is NO EEPROM header string OR (b) If there is no EEPROM ( no data is received by micro-processor) [NO] is displayed.

Checksum : (Condition 2)

If the version of the EEPROM does not match or not working properly [NG] is display.

Checksum : (Condition 3)

If the EEPROM version matches, checksum [YYYY] is displayed.

(Display 2)

The Checksum of EEPROM and firmware version will be display for 2 sec.

7.2.2. Service Mode Table 2

Item FL Display Key Operation

Mode Name Description Front Key

FL Display Test To check the FL segments

display (All segments will light up)

Volume Setting To check for volume setting

CD Loading Test Mode

(DLS6C)

during this mode, Bass & treble is set to 0dB & EQ is switch off.

To determine the reliability of CD Loading unit. To check for the Open/Close operation for the CD loading unit. It fails when there is abnormality in opening or closing.

In Doctor Mode:

1. Press [DIMMER] button on remote control.

To cancel, press [0] button on remote control.

To exit Doctor Mode, press button on main unit or remote control. In Doctor Mode:

1. Press [7] button on remote control.

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

In Doctor Mode:

2. Press [8] button on remote control.

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

In Doctor Mode:

3. Press [9] button on remote control.

To exit Doctor Mode, press button on main unit or remote control. In Doctor Mode:

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

To cancel, press [0] button on remote control.

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

CD Traverse Unit Test

Mode (DLS6C)

CD Combination Test

Mode (DLS6C)

Cold Start To activate cold start upon

To check for the traverse unit operation. In this mode, the first & last track is access & read. (TOC). It fails when TOC is not completed by IOS or the traverse is out of focus.

A combination of CD loading & traverse unit test.

next AC power up.

In Doctor Mode:

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

To cancel, press [0] button on remote control.

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

In Doctor Mode:

1. Press [ ], [1], [3] button on remote control.

To cancel, press [0] button on remote control.

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

In Doctor Mode:

1. Press [SLEEP] button on remote control.

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

Item FL Display Key Operation

Mode Name Description Front Key

USB Test Mode To Inspect USB Testing.

The display will appear after 3s,

In Doctor Mode:

1. Select to USB mode.

2. Press [2] button on remote control.

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

7.3. 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

H15 CD Open SW Abnormal During normal operation

CD OPEN SW On fail to be detected with 4 sec. Error No. shall be clear by force or during cold start.

F15 CD REST SW Abnormal CD traverse position intial

F26 Communication between

CD servo LSI and micro-p abnormal.

F76 Power Amp IC output

abnormal

setting operation failsafe counter (1000 ms) waiting for REST SW to turn on. Error No. shall be clear by force or during cold start. 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 disp l a y s h a l l b e " N O D I S C " . Error No. shall be clear by force or cold start. DCDET1 = L (NG) For power.

For CD Mechanism Unit (DLS6C). Press [ ] on main unit for next error.

Press [ ] on main unit for next error.

8 Troubleshooting Guide

9 Service Fixture & Tools

Prepare service tools before process service position.

Service Tools Remarks

Main P.C.B. (CN901) - Panel P.C.B. (CN900) REEX1022 (11P FFC) (RTL)

10 Disassembly and Assembly Instructions

“ATTENTION SERVICER”

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

Special Note:

1. This section describes the disassembly procedures for all the major printed circuit boards and main components.

2. Before the disassembly process was carried out, do take special note that all safety precautions are to be carried out. (Ensure that no AC power supply is connected during disassembling.)

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

4. Do take note of the locators on each printed circuit board during reassembling procedures.

5. The Switch Regulator IC may have high temperature after prolonged use.

6. Use caution when removing the top cabinet and avoid touching heat sinks located in the unit.

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

• Disassembly of Top Cabinet Assembly

• Disassembly of Headphone P.C.B.

• Disassembly of iPod P.C.B.

• Disassembly of Front Panel Assembly

• Disassembly of USB P.C.B.

• Disassembly of Panel P.C.B.

• Disassembly of FL Window

• Disassembly of Centre Ornament

• Disassembly of CD Lid

• Disassembly of CD Mechanism Unit (DLS6C)

• Disassembly of Power P.C.B.

• Replacement of Power Amp IC (IC5101)

• Disassembly of Main P.C.B.

• Disassembly of Fan Unit

• Disassembly of Transformer P.C.B.

• Replacement of Transistor (Q5901)

• Disassembly of CD Servo P.C.B.

10.1. 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.

10.2. Main Parts Location Diagram

10.3. Disassembly of Top Cabinet Assembly

Step 1 : Remove 3 screws.

Step 3 : Remove 3 screws.

Step 4 : Lift the Top Cabinet Assembly as arrow shown to

release 3 catches.

Step 2 : Remove 3 screws.

Step 5 : Upset the Top Cabinet Assembly as arrow shown. Step 6 : Place a support block underneath the Top Cabinet

Assembly.

Step 7 : Detach 5P cable at connector (CN902) on Main P.C.B.. Step 8 : Detach 14P FFC at connector (CN350) on Main

P. C.B ..

Step 9 : Remove Top Cabinet Assembly.

10.4. Disassembly of Headphone P.C.B.

• Follow the (Step 1) - (Step 9) of item 10.3.

Step 1 : Remove 2 screws. Step 2 : Release guide and remove Headphone P.C.B..

10.5. Disassembly of iPod P.C.B.

• Follow the (Step 1) - (Step 9) of item 10.3.

Step 1 : Remove 2 screws. Step 2 : Remove iPod P.C.B.. Caution : Ensure the iPod P.C.B. is seated properly on the

locator after assembled.

10.6. Disassembly of Front Panel Assembly

• Follow the (Step 1) - (Step 9) of item 10.3.

Step 1 : Detach 4P cable at connector (CN5902) on Transformer P.C.B..

Step 2 : Detach 11P FFC at connector (CN901) on Main P. C.B .. Step 3 : Detach 22P FFC at connector (CN380) on Main P. C.B ..

10.7. Disassembly of USB P.C.B.

• Follow the (Step 1) - (Step 9) of item 10.3.

• Follow the (Step 1) - (Step 6) of item 10.6.

Step 1 : Remove 2 screws.

Step 4 : Release both guides. Step 5 : Release 3 Catches from the bottom. Step 6 : Remove the Front Panel Assembly. Caution : Do not attempt to exert strong force when

detaching the front panel assembly.

Step 2 : Release both catches as arrows shown. Step 3 : Detach the USB P.C.B as arrow shown to release from

both guides.

+ 63 hidden pages