Panasonic SC-TM44 Service Manual

ORDER NO. MD0510379C1 A6

Speaker System

MODEL UNIT

SC-TM44 SA-TM44 Stereo

SB-TM44

Specifications

POTENCIA DE SALIDA (AMPLIFICADOR)

SC-TM44 Colour (S)... Silver Type

SB-TM44 Front Speaker

SA-TM44

SB-TM44

SC-TM44 Frontal (Bajo) 105 W RCM por canal (3Ω) 1kHz, 10% DAT

Amplificador SA-TM 44

Potencia de salida 4600 W (P.M.P.O)

Consumo de potencia 125 W

Alimentaciòn 127 V ca ±10% 60 Hz

Sencibilidad music port: 100 mV

Rango de sintonìa AM:

Rango de sintonìa FM:

Dimensiones

: 6.6 kg aprox

Peso

Notes: Specifications ar e subject to chan ge without notice. Mass and dimens ions are approximate.Total harmonic distortion is me asured by the digital spect rum analyzer.

(b x h x l) 250 mm x 330 mm x 343mm

520-1710MHz (paso de 0,2 MHz)

87.9-107.9 MHz (paso de 0,2 MHz

87.5-108.0 MHz (paso de 0,1 MHz

(Alto)105 W RCM por canal (3Ω) 10kHz, 10% DAT

Bafles SB-TM 44

FRONTAL Bocina Super Tweeter piezo type

ina Tweeter 6 cm

Boc Bocina Woofer 16

IMPEDANCI Fronta

o 3 Ω

Alt

jo 3 Ω

Dimensiones

Peso: 3.4 kg aprox

l - - - - - -

(b x h x l) 247 mm x 330 mm x 221mm

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 and 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 5.2MΩ. 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 transfo rmer for this check.

2. Connect a 1.5kΩ, 10 watts resistor, in parallel with a 0.15µF capacitor, between each expose d 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 out 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.

1.2. Before repair and adjustment

Disconnect AC power, discharge Power Capacitors C5101, C5104, C5171, C5172, C5920, C5940 and C5950 through a 10Ω,5W 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 (volume min at CD mode) should be ~ 300mA.

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 connec tion wires are

“shorted”, or if speaker systems with an impedance less than the indicated rated impedance of the amplifier are used.

If this occurs, follow the procedure outlines below:

1. Turn off the power.

2. Determine the cause of the problem and correct it.

3. Turn on the power once again after one minute.

Note :

When the protection circuitry functions, the unit will not operate unless the power is first turned off and then on again.

2 Prevention of Electro Static Discharge (ESD) to

Electrostatically Sensitive (ES) Devices

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

1. Immediately before 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 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 body motions when handling unpackaged replacement ES devices. (Otherwise harmless motion such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity (ESD) sufficient to damage an ES device).

3 Handling Precautions For Traverse Deck

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

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

· Way of handling the 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. Do 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.

4. Do not turn the variable resistor for laser power adjustment. (It is pre-adjusted during production time)

Grounding for electrostatic breakdown prevention

1. Human body grounding

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

2. Work table grounding

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.

4 Precaution of laser diode

CAUTION:

This unit utilizes a class 1 laser diode in the optical pickup unit .

Invisible laser radiation is emitted from the optical pickup lens.

Wavelength: 780nm

When the unit is turned on:

1. Do not look directly into the optical pickup lens.

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

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

4. Do not disassemble the optical optical pickup unit.

5. If the optical pickup is replaced, use the manufacturer’s specified replacement pickup 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.

n Use of caution label

5 Handling the Lead-free Solder

5.1. About lead free solder (PbF)

Distinction of PbF P.C.B.:

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

Caution:

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

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

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

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

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

6 New Features

6.1. CRS1 Mechanism Overview

6.1.1. General Feature

· This is a five disc changer mechanism for CD/DVD. The outline figure is shown below.

· The mechanism has "CHANGE WHILE PLAY" function. It open other trays for disc exchanging while one tray is at PLAY

position performing recording or reproducing.

· The mechanism can quickly change all trays with "CHANGE ALL" function. All trays can be move to OPEN position with one

operation.

· There is no sensor to indicate presence of disc on any tray.

6.1.2. Hardware composition

· Below is the hardware components of the mechanism

Name Function

Open Switch (OPEN-SW) The switch is used to detect normal tray opening

The switch is used for detect tray being manually push/trigger when full open Home Switch (HOME-SW) Is used to detect cam gear home position Close Sensor (CLOSE-SENSOR) Used for normal single tray closing

Used to detect cam gear rotate to Play Driving position Play Switch (PLAY-SW) Detect TRV clamping complete position Stocking Switch (STOCK-SW) Detect tray completely transfer for play position to stocking position UD Sensor (UD-SENSOR) Detect TRV vertical movement position Top Switch (TOP-SW) Detect a default position of TRV vertical movement position Driver IC To drive Motor Motor Main driving source for changer Plunger Switching the driving source from motor to:

1. Tray open/close

2. Drive tray to play/stock position and TRV vertical movement

6.1.3. Mechanism Operation

· This mechanism has the following state:

1. Driving of a tray to open/close

2. Up/down operation of a traverse performs a state changes of tray.

By using the plunger to lift/release of a switching gear, and the cam gear to lift/release the function gear the motor can be link to several gear trains to perform various operations.

· The functions that can be perform in this mechanism are described as below:

Condition Explanation

Open current playing tray The state to change current playing disc. All tray will be open at once and current tray at PLAY position

Open All The state where all trays being driven to OPEN position. The disc can be taken in or out from tray to tray

Stock The state where the trays are stored in STOCK position Play The state where one of the tray 5 trays is being driven to PLAY position and clamped by traverse unit Play & Open Tray-* The state where one of the tray is in playing position performing recording or reproducing, other trays can

Change The state when one of the opened tray being driven from OPEN position to STOCK position and other

Close All The state where all open trays will being driven from OPEN position to STOCK position, one by one from

will be expose.

by close tray one by one from top to bottom.

be used (OPEN position) for disc exchanging without stopping the recording or reproducing process.

opened trays remain still at OPEN position.

top to bottom

Note: * represent tray number (from 1 ~ 5)

6.1.4. New CD Mechanism (CRS1)

Note:

This service manual does not contain the following information for the mention CD Mechanism drive:

· Schematic Diagram, Block Diagram and P.C.B. layout of CD Loading P.C.B.

· Part List for individual parts of the mechanism.

· Explode d View and Parts List for individual parts of the CD Mechanism drive.

Please refer to the original service manual (Order No. MD0509368C0) for the CD Mechanism Drive CRS1.

6.2. Music Port

With reference to page 17 of the operating instruction manual.

7 Accessories

Remote Control

N2QAHB000065

FM Antenna

Wire

RSA0006-L

AC Cord

SJA168-1A

AM Loop Antenna

N1DAAAA00001

8 Operating Instructions Procedures

9 Self diagnosis and special mode setting

This unit is equipped with functions for checking and inspecting namely: Self-Diagnostic and Test Mode.

9.1. Special Mode Table

Item FL Display Key Operation

Mode Name Description Front Key

Self -Diagnostic

Mode

CD Test Mode To enter into checking the

CD Auto

Adjustment

To enter into self diagnostic checking for main unit.

reliability of changer unit.

To check the CD auto adjustment result for FLOCK, TLOCK and CLVS.

1. Select [

] for TAPE mode (Ensure no tape is inserted).

2. Press and hold [ seconds follow by [

To exit, press main unit or remote control.

1. Select [ ] for CD mode.

2. Press and hold [ seconds follow by [

To exit, press main unit or remote control.

In CD Test Mode:

1. Press [0] button on the remote control.

To exit, press main unit or remote control.

]button for 3

button on

] button for 3

button on

CD Changer

Reliability Test

(CRS1)

Doctor Mode To enter into Doctor

Cold Start To activate cold start

Changer

Reliability Test

To determine the reliability of CD Changer Unit. (For more information, refer to section 9.1.1)

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

upon next AC power up.

To check the function operation of changer unit. (For more information, refer to 9.1.1)

1. All segments will light up for 1 second.

2. The Check Sum of EEPROM and firmware version will be display.

* ROM correction ** Firmware version No:

In Self-Diagnostic Mode:

1. Select [

2. Press [

To exit, press main unit or remote control. (The tray will return to PLAY position and then power off)

In any mode:

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

To exit, press [ENTER] button on remote control or unit or remote control.

In doctor mode:

1. Press [4] button on remote control.

To exit, press [ENTER] button on remote control or unit or remote control.

In doctor mode:

1. Press [DISC] on remote control.

To exit, press [ENTER] button on remote control or unit or remote control.

] for CD mode.

] button.

button on

] button on main unit

button on main

Item FL Display Key Operation

Mode Name Description Front Key

FL Display Test To check the FL

segments display (All segments will light up and LED will blink at 0.5 second interval)

Tape Eject Test To check on the tape

eject function (For deck 1/2)

In doctor mode:

1. Press [PROGRAM] button on remote

In doctor mode:

1. Press [PROGRAM] button on remote

9.1.1. CD changer unit ageing test mode

Below is the process flow chart of ageing for the CD changer unit. (CRS1)

control.

9.2. Error code Table

Self-Diagnosis Function (refer Section 9.1) provides information on any problems occuring for the unit and its respective components by displaying the error codes. These error code such as U**, H** and F** are stored in memory and held unless it is cleared.

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

Error Code Diagnosis Contents Description of error Automatic FL Display Remarks

H01 Mode SW, plunger

and capstan motor abnormal

For deck mechanism unit (For deck 1/2). Press [ next error.

] on main unit for

H02 Rec INH SW

H03 HALF SW abnormal For deck mechanism unit (For deck 1/2).

F01

F02

F15 RESET SW

F26 Transmission error

F61 Power Amp IC output

IHMS Cam gear

abnormal

Reel pulse abnormal

TPS error

abnormal

between CD Servo LSI IC and microprocessor IC

abnormal

abnormality

REST SW: ON is not detected within the specified time.

When set to CD mode, the sense signal does not turn “Low”, a fail safe time after system command transmission is sent.

Upon power on, PCONT=HIGH, DCDET=L after checking LSI.

Cam gear does not rotate to “HOME” position.

For deck mechanism unit (For deck 2). Press [ next error.

Press [ next error.

For deck mechanism unit (For deck 1/2). Press [ next error.

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

For power. Press [ next error.

For CD changer unit (CRS1). Press [SINGLE CHANGE] on main unit for next error.

] on main unit for

ICSL Cam gear/gear units

abnormal

ISTK Drive rack/gear

assembly abnormal

IPLY Drive rack/gear

assembly abnormal

Cam gear does not rotate to “PLAY” driving position and hence does not drive playing tray to “STOCK” position.

The tray drive rack does not move to “STOCK” position. (Tray does not move to “STOCK” position)

The tray drive rack does not move to “PLAY” position. (Tray does not move to “PLAY” position)

For CD changer unit (CRS1). Press [SINGLE CHANGE] on main unit for next error.

Error Code Diagnosis Contents Description of error Automatic FL Display Remarks

ITOP UD assembly UD Rack does not

move to front direction. This lead to UD base not raise to top position.

For CD changer unit (CRS1). Press [SINGLE CHANGE] on main unit for next error.

IUDS UD assembly After TOP SW is

HOME Cam gear/gear

assembly abnormal

LOAD Tray drive assembly

abnormal

PDRV Cam gear/gear

assembly abnormal

detected, UD rack does not move into tray 1 position.

Cam gear does not move to “HOME” position under following conditions

1. After tray is load to “PLAY” position.

2. After tray is unload to “STOCK” position.

Tray unit does not move from “STOCK” to “PLAY” position

Cam gear does not move from “HOME” to “PLAY” drive position.

For CD changer unit (CRS1). Press [SINGLE CHANGE] on main unit for next error.

UDU UD base asssembly

abnormal

UDD UD base asssembly

abnormal

UD1 UD base asssembly

abnormal

F1NG Fail - safe mode. (For

open/close tray unit(s))

UD Base assembly does not move upwards from tray 5 to tray 2

UD Base assembly does not move downwards from tray 1 to tray 5.

UD Base assembly does not move to tray

When the tray open operation is performed, it fails to open. It will automatically close all trays after the time-out by the microprocessor. During this time when it fails, the error code will appear.

For CD changer unit (CRS1). Press [SINGLE CHANGE] on main unit for next error.

Error Code Diagnosis Contents Description of error Automatic FL Display Remarks

F2NG Fail - safe mode. (For

open/close tray unit(s))

SRVC_TRV To unlock the

traverse unit for service

RSET Cam gear jam/close

sensor faulty

When the tray close operation is performed, it fails to close. It will automatically open all trays after the time-out by the microprocessor. During this time when it fails, the error code will appear.

1. All trays set to “STOCK” position

2. Mechanism set to tray 5

3. Cam gear set to “HOME” position

During tray re-open, the cam gear will rotate in the opposite direction to reset the cam gearposition. When it fails, the error code will appear.

For CD changer unit (CRS1). Press [SINGLE CHANGE] on main unit for next error.

CRS1 Error Code display

1. The errors that occured in CRS1 Mechanism can be recalled and displayed, in the order of the occurence under self-diagnostic (Refer to Section 9.1 for procedures to enter this mode.

· Only the first 5 errors will be memorized (in backup memory). The subsequence error shall be ignored and not memorize.

For system with EEPROM as memory backup,memory space in EEPROM is neccesary.

2. To display all error code memorized

In CRS1 Self-Diagnostic mode, press [SINGLE CHANGE] to display subsequence error code.

It shall repeat after reaching error no. 5.

e.g.:

[1____IHMS]→ [SINGLE CHANGE]

[2____ITOP]→ [SINGLE CHANGE]

[3____HOME]→ [SINGLE CHANGE]

[4____LOAD]→ [SINGLE CHANGE]

[5_____UDD]→ [SINGLE CHANGE]

3. To clear the error code memory In CRS1 Self-Diagnostic mode, long press [SINGLE CHANGE] key (2s or more)1

10 Assembling and Disassembling

10.1. Caution

Special Note:

This model uses a new CD changer unit CRS1. In this following section does not contain the necessary disassembly & assembly information for the CD changer unit (CRS1) except the disasembly & assembly of traverse unit. Kindly refer to the original service manual for the CD changer unit. (Order No. MD050 9368C0).

“ATTENTION SERVICER”

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

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

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

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

4. Refer to the Parts No. on the page of “Parts Location and Replacement Parts List” (Section 22), if necessary.

Warning :-

This product uses a laser diode. Refer to caution statement Precaution of Laser Diode.

Caution:

After replacing of CD Changer Unit, ageing test is necessary. Please confirm operation for CD Changer Unit.

Below is the list of disassembly sections

· Disasse mbly of Top Cabinet

· Disasse mbly of Rear Panel

· Disasse mbly of CD Changer Unit

· Disasse mbly of Main P.C.B.

· Disasse mbly of Transformer P.C.B.

· Disasse mbly of Power P.C.B.

· Disasse mbly of Front Panel Unit

· Disasse mbly of Panel P.C.B.

· Disasse mbly of Deck Mechanism Unit

· Disasse mbly for Deck P.C.B.

· Disasse mbly of Traverse Unit

· Disasse mbly of Optical Pickup Unit (CD Mechanism)

· Disasse mbly of Deck Mechanism

· Replacement for cassette lid

· Rectification for tape jam problem

10.2. Disassembly flow chart

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

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

10.3. Main Parts Location

10.4. Disassembly of Top Cabinet

Step 1 Remove 3 screws at each side and 5 screws at rear

panel.

Step 2 Lift up both sides of the top cabine t, push the top cabinet towards the rear to remove the top cabinet.

10.5. Disassembly of Rear Panel

· Follow the (Step 1) - (Step 2) of Item 10.4 - Disassembly of Top Cabinet

Step 1 Remove 5 screws.

Step 2 Disconnect cable CN2810 (Fan) at Main P.C.B..

Step 3 Remove rear panel.

10.6. Disassembly of CD Changer Unit (CRS1)

· Follow the (Step 1) - (Step 2) of Item 10.4 - Disassembly of Top Cabinet

Step 1 Remove 1 screw at rear panel.

Step 2 Detach the FFC cables (CN2801 & CN2805).

Step 3 Release the claws on both ends.

Step 5 Remove 2 screws.

Step 6 Remove the Mecha Chassis.

Note:

For disassembly & assembly of traverse unit, please refer to section 10.14 of this service manual.Please refer to original Service Manual for the Disassembly and Assembly of the CD Changer Unit (CRS1).

Step 4 Lift the CD changer unit upwards to remove it.

· Disasse mbly of Mecha Chassis

10.7. Disassembly of Main P.C.B.

· Follow the (Step 1) - (Step 2) of Item 10.4 - Disassembly of Top Cabinet

· Follow the (Step 1) - (Step 4) of Item 10.6 - Disassembly of CD Changer Unit

· Follow the (Step 1) - (Step 3) of Item 10.5 - Disassembly of Rear Panel

Step 1 Disconnect FFC cables (CN2803, CN2806 and CN2951).

Step 2 Detach connectors (CN2808 & CN2809).

Step 3 Remove Main P.C.B..

10.8. Disassembly of Transformer P.C.B.

· Follow the (Step 1) - (Step 2) of Item 10.4 - Disassembly of Top Cabinet

· Follow the (Step 1) - (Step 3) of Item 10.5 - Disassembly of Rear Panel

· Follow the (Step 1) - (Step 4) of Item 10.6 - Disassembly of CD Changer Unit

Step 1 Disconnect connectors (CN5950 & CN5951).

Step 2 Remove 3 screws (Mounting screws for transformer to

bottom chassis).

Step 3 Push the Transformer P.C.B. sidewards to remove it.

10.9. Disassembly of Power P.C.B.

· Follow the (Step 1) - (Step 2) of Item 10.4 - Disassembly of Top Cabinet

· Follow the (Step 1) - (Step 4) of Item 10.6 - Disassembly of CD Changer Unit

· Follow the (Step 1) - (Step 3) of Item 10.5 - Disassembly of Rear Panel

· Follow the (Step 1) - (Step 3) of Item 10.7 - Disassembly of Main P.C.B.

Step 1 Remove the 5 screws on Power P.C.B..

Step 2 Detach cable (CN5950) remove the 5 screws on Power

P.C.B..

Step 3 Remove Power P.C.B..

Note:

Insulate the Power P.C.B. with insulation material to avoid short circuit.

· Replacement of the Power Amp IC or Voltage Regulator

Step 4 Remove 2 screws at the Power Amp IC and/or 3

screws to Voltage Regulator.

Step 5 Cut the joints with a metal cutter as shown below.

Step 6 Desolder the terminals to replace the components.

Step 7 Fix back the cut portion with a screw as shown.

10.10. Disassembly of Front Panel Unit

· Follow the (Step 1) - (Step 2) of Item 10.4 - Disassembly of Top Cabinet

· Follow the (Step 1) - (Step 4) of Item 10.6 - Disassembly of CD Changer Unit

Step 1 Disconnect connectors (CN2803, CN2806, CN2951, CN5950 & CN5951).

Step 3 Release 2 claws outwards.

Step 2 Bent the front panel unit slightly forward as arrow

shown.

Step 4 Remove the front panel unit.

Note: Ensure 2 claws located at the bottom chassis is seated

into the 2 slots at bottom of front panel at 2 catches (one on each side) of bottom chassis to be aligned to front panel’s slot. Assembly is secured upon hearing clicking sound.

10.11. Disassembly for Panel P.C.B.

· Follow the (Step 1) - (Step 2) of Item 10.4 - Disassembly of Top Cabinet

· Follow the (Step 1) - (Step 4) of Item 10.6 - Disassembly of CD Changer Unit

· Follow the (Step 1) - (Step 4) of Item 10.10 - Disassembly of Front Panel Unit

Step 1 Remove the volume knob.

Step 2 Remove Lid.

Note: Do not misplace the spring.

Step 2 Remove 11 screws.

Step 3 Release 2 catches.

Step 4 Remove Panel P.C.B..

10.11.1. Disassembly of Lid

Step 1 Lift the spring sideward.

10.12. Disassembly of Deck mechanism unit

· Follow the (Step 1) - (Step 2) of Item 10.4 - Disassembly of Top Cabinet

· Follow the (Step 1) - (Step 4) of Item 10.6 - Disassembly of CD Changer Unit

· Follow the (Step 1) - (Step 4) of Item 10.10 - Disassembly of Front Panel Unit

Step 1 Detach FFC cable (CN971).

Step 2 Disconnect FFC cable (CN1001).

Step 3 Remove the 5 screws.

Step 4 Push the lever upward, and then open the cassette lid

ass’y (For DECK1 and DECK2).

Step 5 Tilt the cassette mechanism unit in the direction of arrow (1), and then remove it in the direction of arrow (2).

Note: For disassembly of parts for deck mechanism unit, refer to Section 10.15.

10.13. Disassembly of Deck P.C.B.

· Follow the (Step 1) - (Step 2) of Item 10.4 - Disassembly of Top Cabinet

· Follow the (Step 1) - (Step 4) of Item 10.6 - Disassembly of CD Changer Unit

· Follow the (Step 1) - (Step 4) of Item 10.10 - Disassembly of Front Panel Unit

Step 1 Remove 2 screws.

Step 2 Desolder wire at deck motor terminals (W1002).

Step 3 Remove Deck P.C.B.

10.14. Disassembly of Traverse Unit

· Follow the (Step 1) - (Step 2) of Item 10.4 - Disassembly of Top Cabinet

· Follow the (Step 1) - (Step 4) of Item 10.6 - Disassembly of CD Changer Unit22

Important notes: Ensure all the trays are in the “STOCK” position before proceeding to the disassemble of traverse unit. For procedures to set the trays in “STOCK” position, please refer to original Service Manual for CRS1, Section 7. Disassembling Procedure When Tray In Play Position, Order No. MD0509368C0.

Step 1: Press and hold the plunger lever and rotate the gear as arrows shown until it stop.

Step 3: Remove the traverse unit as arrow shown.

· Assembly of Traverse Unit

Step 2: Push the traverse slide plate as arrow shown to release the traverse unit.

Caution: Do not exert strong force on the traverse slide plate.

Step 1: Turn over the unit and install the traverse unit.32

Step 2: Push the traverse slide plate as arrow shown to lock the traverse unit.

10.15. Disassembly of optical pickup unit (CD mechanism)

· Follow the (Step 1) - (Step 2) of Item 10.4 - Disassembly of Top Cabinet

· Follow the (Step 1) - (Step 4) of Item 10.6 - Disassembly of CD Changer Unit

· Follow the (Step 1) - (Step 2) of Item 10.14 - Disassembly of Traverse Unit

Step 1 Pull out FFC.

Step 3 Remove 4 pins.

Step 2 Widening the catch, push the pin in.

+ 93 hidden pages

Panasonic SC-TM44 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual