Panasonic SCHC-20-P, SCHC-20-PC Service manual

Compact Stereo System

Model No. SC-HC20P

SC-HC20PC

Product Color: (K)...Black Type

PSG1002011CE

TABLE OF CONTENTS

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

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

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

1.3. Caution For Fuse Replacement------------------------ 4

1.4. Protection Circuitry ---------------------------------------- 4

1.5. 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----------------------------------------------- 9

3.1. Service Information --------------------------------------- 9

4 Specifications ----------------------------------------------------10 5 Location of Controls and Components ------------------11

PAGE PAGE

5.1. Main Unit & Remote Control Key Button Operations ------------------------------------------------- 11

6 Operating Instructions ---------------------------------------- 12

6.1. Connections ----------------------------------------------- 12

6.2. Disc operations ------------------------------------------- 12

6.3. Notes on CD-R and CD-RW -------------------------- 13

6.4. External unit (iPod or iPhone)------------------------- 13

7 Self Diagnostic and Doctor Mode Setting -------------- 14

7.1. Self Diagnostic Mode ----------------------------------- 14

7.2. Self Diagnostic Function Error Code---------------- 15

7.3. Entering Doctor Mode----------------------------------- 16

7.4. Sales Demonstration Lock Function Mode -------- 19

8 Service Fixture & Tools --------------------------------------- 20 9 Disassembly and Assembly Instructions--------------- 21

9.1. Disassembly flow chart --------------------------------- 22

9.2. Types of Screws------------------------------------------ 23

9.3. Main Parts Location Diagram ------------------------- 24

9.4. Disassembly of Stand Unit ----------------------------- 25

9.5. Disassembly of iPod/iPhone P.C.B. -----------------25

9.6. Disassembly of Sub Rear Panel --------------------- 27

9.7. Disassembly of Docking Tub and Tub Cover -----28

9.8. Disassembly of Tuner P.C.B.-------------------------- 30

9.9. Disassembly of SMPS P.C.B. ------------------------- 31

9.10. Replacement of Switching Regulator IC (IC702)------------------------------------------------------32

9.11. Replacement of Diode (D702) ------------------------ 33

9.12. Disassembly of Net Frame Unit ----------------------35

9.13. Disassembly of Front Cabinet unit ------------------- 37

9.14. Disassembly of Motor P.C.B., Bridge 1 P.C.B. & Position Switch P.C.B.--------------------------------38

9.15. Disassembly of Motor Assembly --------------------- 39

9.16. Replacement of CD Door Ornament ---------------- 41

9.17. Replacement of CD Door Base----------------------- 42

9.18. Replacement of Door Shaft & CD Door Slider Bottom ------------------------------------------------------44

9.19. Replacement of Rack Top, Slider Top & Timing Gear Shaft---------------------------------------- 47

9.20. Disassembly of Speaker unit -------------------------- 49

9.21. Disassembly of Speaker P.C.B. & Bridge 2 P.C.B.-------------------------------------------------------- 49

9.22. Disassembly of Traverse Deck ----------------------- 50

9.23. Disassembly of Traverse Cover --------------------- 52

9.24. Disassembly of CD Servo P.C.B.--------------------- 53

9.25. Disassembly of LCD Holder Unit and Panel P.C.B.-------------------------------------------------------- 53

9.26. Disassembly of Headphone/Aux P.C.B. ------------54

9.27. Disassembly of Top Ornament Unit and Panel Key P.C.B.-------------------------------------------------- 55

9.28. Disassembly of Main P.C.B. --------------------------- 56

9.29. Replacement of Transistor (Q512)------------------- 57

10 Service Position ------------------------------------------------- 59

10.1. Checking & Repairing of SMPS P.C.B. ------------- 59

10.2. Checking & Repairing of Panel P.C.B. -------------- 60

10.3. Checking & Repairing of CD Servo P.C.B.---------62

10.4. Checking & Repairing of Main P.C.B. (Side B) --- 64

10.5. Checking & Repairing of Main P.C.B. (Side A) --- 66

11 Voltage Measurement & Waveform Chart---------------69

11.1. CD SERVO P.C.B. ---------------------------------------69

11.2. MAIN P.C.B. (1/3) ---------------------------------------- 70

11.3. MAIN P.C.B. (2/3) ---------------------------------------- 71

11.4. MAIN P.C.B. (3/3) ---------------------------------------- 72

11.5. Panel P.C.B. ----------------------------------------------- 72

11.6. TUNER P.C.B. -------------------------------------------- 72

11.7. SMPS P.C.B. ----------------------------------------------73

11.8. Waveform Chart ------------------------------------------ 74

12 Illustration of IC’s, Transistors and Diodes ------------75 13 Overall Simplified Block -------------------------------------- 77 14 Block Diagram --------------------------------------------------- 78

14.1. SERVO/SYSTEM CONTROL BLOCK DIAGRAM-------------------------------------------------- 78

14.2. AUDIO BLOCK DIAGRAM ---------------------------- 79

14.3. POWER SUPPLY BLOCK DIAGRAM -------------- 80

15 Wiring Connection Diagram --------------------------------- 81 16 Schematic Diagram Notes -----------------------------------83 17 Schematic Diagram---------------------------------------------85

17.1. CD SERVO CIRCUIT -----------------------------------85

17.2. MAIN CIRCUIT (1/4) ------------------------------------ 86

17.3. MAIN CIRCUIT (2/4) ------------------------------------ 87

17.4. MAIN CIRCUIT (3/4) ------------------------------------ 88

17.5. MAIN CIRCUIT (4/4) ------------------------------------ 89

17.6. PANEL CIRCUIT----------------------------------------- 90

17.7. TUNER / PANEL KEY / HEADPHONE/AUX / POSITION SWITCH CIRCUIT ----------------------- 91

17.8. MOTOR / BRIDGE 1 / SPEAKER / BRIDGE 2 CIRCUIT --------------------------------------------------- 92

17.9. SMPS CIRCUIT ------------------------------------------ 93

17.10. iPod/iPhone CIRCUIT ---------------------------------- 94

18 Printed Circuit Board------------------------------------------ 95

18.1. CD SERVO/ TUNER/ iPod/iPhone P.C.B.--------- 95

18.2. MAIN P.C.B. ----------------------------------------------- 96

18.3. PANEL/ PANEL KEY/ HEADPHONE/AUX/ POSITION SWITCH/ MOTOR P.C.B. -------------- 97

18.4. BRIDGE 1/ SPEAKER/ BRIDGE 2/ SMPS P.C.B. ------------------------------------------------------- 98

19 Terminal Function of IC’s ------------------------------------ 99

19.1. IC801 (RFKWMHC10EB) MICRO PROCESSOR IC ---------------------------------------- 99

19.2. IC7001 (MN6627954AMA) IC SERVO PROCESSOR ------------------------------------------- 100

19.3. IC7002 (BA5948FPE2) IC 4CH Drive ------------- 101

20 Exploded View and Replacement Parts List---------- 103

20.1. Exploded View and Mechanical replacement Parts List--------------------------------------------------103

20.2. Electrical Replacement Parts List ------------------ 109

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

Disconnect AC power, discharge unit AC Capacitors as such C702, C710, C725, C727, C728 and C731 through a 10W, 1W resistor to ground. Caution : DO NOT SHORT-CIRCUIT DIRECTLY (with a screwdriver blade, for instance), as this may destroy solid state devices. After repairs are completed, restore power gradually using a variac, to avoid overcurrent.

• Current consumption at AC 120V, at 60Hz in NO SIGNAL mode (at volume min in FM Tuner mode) should be ~250 mA.

1.3. Caution For Fuse Replacement

1.4. 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.

1.5. 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

16 RFKHHC20P-K REAR CABINET ASS’Y P

16 RFKHHC20PCK REAR CABINET ASS’Y PC

401 RAE0165T-V TRAVERSE UNIT

A2 K2CB2CB00021 AC CORD

A3 RQTX1051-P O/I BOOK (En) P

A3 RQTX1133-C O/I BOOK (Sp/Cf) PC

C702 F0CAF104A105 0.1uF

C710 F1BAF1020020 1000pF

C725 F0CAF104A105 0.1uF

C727 F1BAF1020020 1000pF

C728 F1BAF1020020 1000pF

C731 F1B3A221A027 220pF 1000V

F751 K5D302AQ0003 FUSE

L702 G0B453G00003 LINE FILTER

P751 K2AB2B000007 AC INLET

PC701 B3PBA0000402 PHOTO COUPLER

PCB11 REPX0818FA SMPS P.C.B (RTL)

T701 ETS25BF116AD TRANSFORMER

TH701 D4CAA5R10001 THERMISTOR

TH702 D4CC11040013 THERMISTOR

Z752 ERZV10V511CS ZNR

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) sufficient 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.

Figure 1

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.

• Micro-processor:

1) The following components are supplied as an assembled part.

- Micro-processor IC, (IC801) (RFKWMHC10EB)

4 Specifications

Q Amplifier Section RMS Output Power Stereo Mode Front Ch (both ch driven) 6 W per channel (6 Ω), 1 kHz,

Phone jack Terminal Stereo, 3.5 mm (1/8") jack Output level (CD, 1 kHz, -20 dB) max. 0.385 mW +0.385 mW, 32 Ω Aux (Rear) Sensitivity Normal level 504 mV, 12.4 kΩ High level 100 mV, 12.4 kΩ Terminal Stereo, 3.5 mm (1/8") jack Q Tuner Section Preset memory FM 30 stations

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

87.5 MHz to 108.0 MHz

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

Q Disc Section Disc played [8 cm (3") or 12 cm (5")] (1) CD-Audio (CD-DA) (2) CD-R/RW (CD-DA, MP3) (3) MP3* * MPEG-1 Layer 3, MPEG-2 Layer 3

Pick up Wavelength 785 nm Laser power CLASS 1 Audio output (Disc) Number of channels FL, FR, 2 channel Q Speaker Section Typ e 1 way, 1 speaker system

Speaker unit(s) Full range 8 cm (3 1/8") Cone type Impedance 6 Ω Output sound pressure 83 dB/W (1.0m) Frequency range 60 Hz to 25 kHz (-16 dB)

90 Hz to 22 kHz (-10 dB)

Q General Power supply AC 120 V, 60 Hz Power consumption 14 W Dimensions (W x H x D) 384 mm x 214 mm x 112 mm

(15 1/8" x 8 7/16" x 4 13/32")

(D = 69 mm (2 22/32") minimum)

(D = 147 mm (5 25/32") tray open)

Mass Approx. 2.1 kg (4.6 lb.) Operating temperature range 0°C to +35°C Operating humidity range 35% to 80 % RH

Power consumption in standby mode: 0.18 W (approx)

• Specifications are subject to change without notice.

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

10 % THD

AM 15 stations

(200 kHz step)

(100 kHz step)

(10 kHz step)

(Bass reflex)

(no condensation)

5 Location of Controls and Components

5.1. Main Unit & Remote Control Key Button Operations

6 Operating Instructions

6.1. Connections

6.2. Disc operations

6.3. Notes on CD-R and CD-RW

6.4. External unit (iPod or iPhone)

7 Self Diagnostic and Doctor Mode Setting

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

7.1. Self Diagnostic Mode

Here is the procedures to enter into Self Diagnostic Mode.

Step 1 : Turn on the unit, and then press and hold [Q] button for 2 seconds follow by [ ] on the unit. Step 2 : The display show as follow.

To exit the Self Diagnostic Mode

Use either one of the following methods to cancel the Self Diagnostic Mode.

• Press the power button on the main unit.

• Unplug the AC cord.

7.1.1. Self Diagnostic Table

Item

Mode name Description

Self Diagnostic Mode To enter into self diagnostic

checking

FL display Key operation

1. Select CD mode (Ensure no CD inserted).

Error code information

Delete Error code

System will perform a check on any unusual/error code from the memory

To clear the stored in memory (EEPROM IC)

2. Press and hold [ ] for 2 seconds follow by [ ] on main unit.

1. In self diagnostic mode, Press [STOP] on main unit.

Example:

To exit, press [TA] on main uint or remote control.

1. In self diagnostic mode, Press [0] on remote control.

To exit, press [TA] on main uint or remote control.

7.2. Self Diagnostic Function Error Code

7.2.1. CD Mechanism Error Code Table

Error Code Diagnostic Contents Description of error Automatic FL Display Remarks

CD H15 CD Open Abnormal During operation

CD H16 CD Closing Abnormal During operation

F15 CD REST SW Abnormal CD traverse position intial

F26 Communication between

CD servo LSI and micro-p abnormal.

POS_SW_R On fail to be detected with 3 sec. Error No. shall be clear by force or during cold start.

POS_SW_CEN On fail to be detected with 3 sec. Error No. shall be clear by force or during cold start.

setting operation failsafe counter (10 s) waiting for REST SW to turn on. Error No. shall be clear by force or during cold start.

During switch to CD function, if SENSE = “L” within failsafe time of 20ms.

Press [ next error.

] on main unit for

7.2.2. iPod Error Code Table

Error Code Diagnostic Contents Description of error Automatic FL Display Remarks

IPD H15 iPod Open Abnormal During operation

POS_SW_L On fail to be detected with 3 sec. Error No. shall be clear by force or during cold start.

IPD H16 iPod Closing Abnormal During operation

POS_SW_CEN On fail to be detected with 3 sec. Error No. shall be clear by force or during cold start.

Press [ next error.

] on main unit for

7.2.3. Power Amp Error Code Table

Error Code Diagnostic Contents Description of error Automatic FL Display Remarks

F61/F76 Power Amp IC output

abnormal

During power-on, PDET1, PDET2 & MAINV_DET / TEMP_DET is “L” after 1 sec.

Press [ next error.

] on main unit for

7.3. Entering Doctor Mode

Here is the procedures to enter into Doctor Mode. Step 1 : Turn on the unit, and then pressing and holding [Q] on main unit in order while press [4] and [7] on the remote control. Step 2 : The display show as follow.

To exit the Doctor mode

Use either one of the following methods to cancel the Doctor mode.

• Press the power button of the unit.

• Unlug the AC cord.

7.3.1. Doctor Mode Table 1

Item

Mode Name Description Front Key

FL Display

Key Operation

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)

(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)

In CD mode:

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

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

] button on main unit fol-

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.

7.3.2. Doctor Mode Table 2

Item

Mode Name Description Front Key

FL Display Test To check the FL segments

display (All segments will light up)

FL Display

In Doctor Mode:

1. Press [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.

Key Operation

Volume Setting To check for volume setting

Mecha Sliding Panel Reliability

CD Traverse Unit Test Mode

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

To check the operation of sliding Panel. Sequence as follow :

1. Panel set to close position.

2. CD Open & stop at left position for 1s.

3. CD Close & stop at centre position for 1s.

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.

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 [ ] follow by [2] & then [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.

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.

CD Auto Adjustment Display

To display result of self adjustment for CD.

The [NO DISC] display will appear after 3s,

(For more information, please refer to Section 7.3.4.)

In Doctor Mode:

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

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

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

7.3.3. Doctor Mode Table 3

Item FL Display Key Operation

Mode Name Description Front Key

Cold Start To activate cold start upon

next AC power up.

The [NO DISC] display will appear after 3s,

In Doctor Mode:

1. Press [SLEEP] button on remote control.

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

7.3.4. CD Traverse Test (Traverse)

7.4. Sales Demonstration Lock Function Mode

7.4.1. Setting

Here is the procedures to enter into Sales Demonstration Lock. Step 1 : Turn on the unit.

Step 2 : Select to any mode function, press and hold [ ] key and follow by [ ] key. It must be pressed within 0.5 sec. Step 3 : The display will show upon entering into this mode.

Note : button is invalid and the main unit displays “LOCKED” while the lock function mode is entered.

7.4.2. Cancellation

Step 1 : To cancel only can be triggered in CD Mode and Volume 19. Step 2 : Press and hold [ ] key and follow by [ ] key. It must be pressed within 0.5 sec.

Step 3 : The display will show after exit from this mode.

8 Service Fixture & Tools

Prepare service tools before process service position.

Service Tools Remarks

Main P.C.B. (CN807) - CD Servo P.C.B. (CN7002) REEX1182 (22P FFC)

9 Disassembly and Assembly Instructions

Caution Note:

• This section describes the disassembly and/or assembly procedures for all major printed circuit boards & main components for the unit. (You may refer to the section of “Main components and P.C.B Locations” as described in the service manual)

• Before carrying out the disassembly process, please ensure all the safety precautions & procedures are followed.

• During the disassembly and/or assembly process, please handle with care as there may be chassis components with sharp edges.

• Avoid touching heatsinks due to its high temperature after prolong use. (See caution as described below)

• During disassembly and assembly, please ensure proper service tools, equipments or jigs is being used.

• During replacement of component parts, please refer to the section of “Replacement Parts List” as described in the service manual.

• Select items from the following indexes when disassembly or replacement are required.

• Disassembly of Stand Unit

• Disassembly of iPod/iPhone P.C.B.

• Disassembly of Sub Rear Panel

• Disassembly of Docking Tub and Tub Cover

• Disassembly of Tuner P.C.B.

• Disassembly of SMPS P.C.B.

• Replacement of Switching Regulator IC (IC702)

• Replacement of Diode (D702)

• Disassembly of Net Frame Unit

• Disassembly of Front Cabinet unit

• Disassembly of Motor P.C.B., Bridge 1 P.C.B. & Position Switch P.C.B.

• Disassembly of Motor Assembly

• Replacement of CD Door Ornament

• Replacement of CD Door Base

• Replacement of Door Shaft & CD Door Slider Bottom

• Replacement of Rack Top, Slider Top & Timing Gear Shaft

• Disassembly of Speaker unit

• Disassembly of Speaker P.C.B. & Bridge 2 P.C.B.

• Disassembly of Traverse Deck

• Disassembly of Traverse Cover

• Disassembly of CD Servo P.C.B.

• Disassembly of LCD Holder Unit and Panel P.C.B.

• Disassembly of Headphone/Aux P.C.B.

• Disassembly of Top Ornament Unit and Panel Key P.C.B.

• Disassembly of Main P.C.B.

• Replacement of Transistor (Q512)

9.1. 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.

9.2. Types of Screws

9.3. Main Parts Location Diagram

9.4. Disassembly of Stand Unit

9.5. Disassembly of iPod/iPhone

Step 1 : Remove 2 screws. Step 2 : Lift up the stand unit as arrow shown. Caution : During assembly, ensure the stand unit is seated

properly into the guide.

P.C.B.

• Refer to “Disassembly of Stand Unit”

Step 1 : Press to open the iPod assembly.

Step 2 : Remove 2 screws.

Step 3 : Lift up Docking Cover as arrow (1) and (2) shown to remove it.

Step 4 : Flip iPod/iPhone P.C.B.. Caution : During assembly, ensure that the iPod/iPhone

P.C.B. is properly seated onto the 3 locators.

Caution : During assembly of Docking Cover, ensure it is fixed properly.

Step 5 : Detach 15P FFC at the connector (CN1002) on iPod/

iPhone P.C.B.. Step 6 : Remove iPod/iPhone P.C.B..

9.6. Disassembly of Sub Rear Panel

• Refer to "Disassembly of Stand Unit”

• Refer to "Disassembly of iPod/iPhone P.C.B."

Note : Ensure the iPod is closed properly Step 1 : Press to lift up the Sub Rear Panel.

Caution 1 : During assembly, ensure the Sub Rear Panel is properly slot into the holes.

Step 2 : Remove Sub Rear Panel.

Caution 2 : During assembly, ensure Sub Rear Panel properly seated on the Rear Cabinet.

9.7. Disassembly of Docking Tub and Tub Cover

• Refer to "Disassembly of Stand Unit”

• Refer to "Disassembly of iPod/iPhone P.C.B."

• Refer to "Disassembly of Sub Rear Panel"

9.7.1. Disassembly of Docking Tub

Step 1 : Press to open the iPod assembly.

Step 2 : Release Spring from the docking tub hole as arrow

shown.

Step 3 : Remove Spring as arrow shown. Caution : Keep springs in the safe place and place them

back During assembly.

9.7.2. Disassembly of Tub Cover

• Refer to "Disassembly of Docking Tub”

Step 1 : Release 2 Guides. Step 2 : Remove Tub Cover.

Step 4 : Release 2 catches. Step 5 : Remove Docking Tub.

9.8. Disassembly of Tuner P.C.B.

• Refer to "Disassembly of Stand Unit”

• Refer to "Disassembly of iPod/iPhone P.C.B."

• Refer to "Disassembly of Sub Rear Panel"

Step 1 : Remove 1 screw. Step 2 : Lift & flip Tuner P.C.B..

Caution : Ensure the 9P FFC (CN51) wire is dressed as diagram shown.

Step 3 : Detach 9P FFC at the connector (CN51) on Tuner

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

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