Panasonic SAPM-32-DBEB Service manual

CD Stereo System

SA-PM32DBEB

Colour

(S)... Silver Type

ORDER NO. MD0603069C2

Specification

n Amplifier Section

RMS OUTPUT POWER both channel driven simultaneously

10% total harmonic distortion 5 W per channel (6 Ω)

Input impedance

MUSIC PORT 250 mV 12 kΩ

Output impedance

HEADPHONE 16 Ω to 32 Ω

Phone jack

Terminal Stereo, 3.5 mm

Music Port input jack

Terminal Stereo, 3.5 mm

DAB External antenna

Terminal F-Connector (75 Ω)

n FM Tuner Section

Frequency range 87.50 MHz to 108.00 MHz

(50 kHz step)

Sensitivity 3.2 µV (IHF)

S/N 26 dB 1.2 µV

ntenna terminals 75 Ω (unbalanced)

Preset station FM 15 stations

AM 15 stations

n AM Tuner Section

Frequency range 522 kHz to 1629 kHz

(9 kHz steps)

Sensitivity

S/N 20 dB (at 999 kHz) 1412 µV/m

n DAB Section

Frequency Band (Wavelength)

Band III (UK only) 11B ~ 12D (218.640 MHz ~

229.072 MHz)

Band III (Europe) 5A ~ 13F (174.928 MHz ~

239.200 MHz)

Intermediate frequency 1st : 38.912 MHz, 2nd : 2.048

MHz

Sensitivity *BER 4x10

MAX. Input Power 0dBm

Min Requirement -98 dBm

Selectivity

djacent Channel (Band III) 33 dB

Far-Off Channel (Band III) 45 dB

DAB memories 20 channels

n CD Section

Disc played [8 cm or 12 cm]

(1) CD-Audio (CD-DA)

(2) CD-R/RW (CD-DA, MP3 formatted disc)

(3) MP3

Sampling frequency

CD 44.1 kHz

SA-PM32DBEB

MP3 32 kHz, 44.1 kHz, 48 kHz

Bit rate

MP3 32 kbps to 384 kbps

Decoding 16/20/24 bit linear

Pickup

Beam source Semiconductor laser

Wavelength 785 nm

Laser power CLASS 1

udio output (Disc)

Number of channels 2 channel

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

Wow and flutter Below measurable limit

Digital filter 8fs

D/A converter MASH (1 bit DAC)

n General

Power supply AC 230 to 240 V, 50 Hz

Power consumption 25 W

Dimensions (W x H x D) 165 mm x 227 mm x 327 mm

Mass 2.8 kg

Operating temperature range +5°C to +35°C

Operation humidity range 5% to 90% RH (no condensation)

Power consumption in standby mode

Notes :

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

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

n System : SC-PM32DBEBS

Music center: SA-PM32DBEBS

Speaker: SB-PM3EG-M

0.8 W

CONTENTS

Page Page

1 Safety Precautions 4

1.1. General Guidelines

1.2. Caution for AC Cord

1.3. Before Repair and Adjustment

1.4. Protection Circuitry

2 Prevention of Electro Static Discharge (ESD) to

Electrostatically Sensitive (ES) Devices

3 Precaution of Laser Diode

4 Handling Precautions For Traverse Deck

5 Handling the Lead-free Solder

5.1. About lead free solder (PbF)

6 Accessories

7 Operating Instructions Procedures

7.1. Main Unit Operation

7.2. Remote Control Operation

7.3. Disc Information

8 Self diagnosis and special mode setting

8.1. Special Mode Table

8.2. Error Code Table

9 Assembling and Disassembling

9.1. Caution

9.2. Disassembly flow chart

9.3. Main Parts Location Diagram

9.4. Disassembly of Side Panel L & R

9.5. Disassembly of Top Cabinet Unit

9.6. Disassembly of Headphone P.C.B.

9.7. Disassembly of Front Panel

9.8. Disassembly of DAB Module unit

9.9. Disassembly of Panel P.C.B.

9.10. Disassembly of Rear Panel

9.11. Disassembly of Tuner Pack

9.12. Disassembly of Main P.C.B.

9.13. Disassembly of Power P.C.B.

9.14. Disassembly of Speaker Terminal P.C.B.

9.15. Disassembly of Transformer P.C.B.

9.16. Disassembly of CD Mechanism

9.17. Disassembly of Traverse Unit, Driving Gear, and Cam

Gear (CD Mechanism Unit)

9.18. Disassembly of Optical Pickup (CD Mechanism Unit)

9.19. Disassembly of Traverse Gear A and Traverse Gear B

(CD Mechanism Unit)

10 Service Fixture and Tools

11 Service Positions

11.1. Checking and Repairing Headphone P.C.B.

11.2. Checking and Repairing of DAB Module Unit and Panel

P.C.B.

11.3. Checking and Repairing of Transformer P.C.B.

11.4. Checking and Repairing of Main P.C.B.

11.5. Checking and Repairing of CD Servo P.C.B.

11.6. Checking and Repairing of Speaker Terminal P.C.B.

11.7. Checking and Repairing of Power P.C.B.

12 Voltage Measurement and Waveform Chart

12.1. Voltage Measurement

12.2. Waveform

13 Wiring Connection Diagram

14 Block Diagram

15 Notes of Schematic Diagram

16 Schematic Diagram

SA-PM32DBEB

16.1. CD SERVO CIRCUIT 49

16.2. MAIN CIRCUIT and TUNER EXTENT CIRCUIT

16.3. PANEL CIRCUIT

16.4. POWER CIRCUIT

16.5. SPEAKER TERMINAL CIRCUIT, TRANSFORMER

CIRCUIT and HEADPHONE CIRCUIT

17 Printed Circuit Board

17.1. CD SERVO P.C.B

17.2. MAIN P.C.B and TUNER EXTENT P.C.B

17.3. PANEL P.C.B

17.4. POWER P.C.B and SPEAKER TERMINAL P.C.B

17.5. TRANSFORMER P.C.B and HEADPHONE P.C.B

18 Illustration of IC's, Transistors and Diodes

19 Terminal Function of IC's

19.1. IC7001 (MN6627954MA) IC SERVO

PROCESSOR/DIGITAL SIGNAL PROCESSOR/DIGITA L

FILTER D/A CONVERTER

19.2. IC7002 (BA5948FPE2) IC 4CH Drive

19.3. IC401 (C2CBYY000223) IC MICROPROCESSOR

20 Troubleshooting Flowchart (CD Section Circuit)

21 Exploded Views

21.1. Cabinet Parts Location

21.2. Traverse Deck Part Location

21.3. Packaging

22 Replacement Parts List

SA-PM32DBEB

1 Safety Precautions

1.1. General Guidelines

1. When servicing, observe the original lead dress. If a short circuit is found, replace all parts which have been overheated or damaged by the short circuit.

2. After servicing, ensure that all the protective devices such as insulation barriers, insulation papers shields are properly installed.

3. After servicing, check for leakage current checks to prevent from being exposed to shock hazards.

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 expose d metallic cabine t part on the equipment such as screwheads, connectors, control shafts, etc. When the exposed metallic part has a return path to the chassis, the reading should be between 1MΩ and 5.2Ω. When the exposed metal does not have a return path to the chassis, the reading must be

Figure 1

1.1.2. Leakage Current Hot Check (See Figure 1)

1. Plug the AC cord directly into the AC outlet. Do not use an isolation transformer for this check.

2. Connect a 1.5kΩ, 10 watts resistor, in parallel with a 0.15µF capacitors, between each exposed metallic part on the set and a good earth ground such as a water pipe, as shown in Figure 1.

3. Use an AC voltmeter, with 1000 ohms/volt or more sensitivity, to measure the potential across the resistor.

4. Check each exposed metallic part, and measure the voltage at each point.

5. Reverse the AC plug in the AC outlet and repeat each of the above measurements.

6. The potential at any point should not exceed 0.75 volts RMS. A leakage current tester (Simpson Model 229 or equivalent) may be used to make the hot checks, leakage current must not exceed 1/2 milliamp. should the measurement is outside of the limits specified, there is a possibility of a shock hazard, and the equipment should be repaired and re-checked before it is returned to the customer.

1.2. Caution for AC Cord

SA-PM32DBEB

1.3. Before Repair and Adjustment

Disconnect AC power, discharge Power Supply Capacitors C501, C601, C807, C813, C814, C831, C839, C840, C909, C910, C911, C923 & C966 through a 10Ω, 1W resistor to ground.

DO NOT SHORT-CIRCUIT DIRECTLY (with a screwdriver blade, for instance), as this may destroy solid state devices.

After repairs are completed, restore power gradually using a variac, to avoid overcurrent.

· Current consumption at AC 230-240 V, 50 Hz in NO SIGNAL mode at (volume minimal) should be ~160 mA.

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 speake r connection wires are "shorted", or if speaker systems with an impedance less than the indicated rated impedance of the amplifier are used.

If this occurs, follow the procedure outlines below:

1. Turn off the power.

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

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

Note:

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

SA-PM32DBEB

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 handlin g 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 applyin g 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 installe d.

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).

SA-PM32DBEB

3 Precaution of Laser Diode

CAUTION:

This unit utilizes a class 1 laser.

Invisible laser radiation is emitted from the optical pickup lens.

When the unit is turned on:

1. Do not look directly into the pick up lens.

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

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

4. Do not disassemble the optical pick up unit.

5. If the optical pick up is replaced, use the manufacturer’s specified replacement pick up only.

6. Use of control or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.

CAUTION!

THIS PRODUCT UTILIZES A LASER. USE OF CONTROLS OR ADJUSTMENTS OR PERFORMANCE OF PROCEDURES OTHER THAN THOSE SPECIFIED HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE.

4 Handling Precautions For Traverse Deck

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

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

l Handling of CD traverse deck (optical pickup)

1. Do not subject the traverse deck (optical pickup) to static electricity as it is extremely sensitive to electrical shock.

2. The short land between the No.4 (LD) and No.5 (GND) pins on the flexible board (FFC) is shorted with a solder build-up to prevent damage to the laser diode.

3. Take care not to apply excessive stress to the flexible board (FFC board) (Fig 4.1).

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

SA-PM32DBEB

Fig 4.1

l Grounding for electrostatic breakdown prevention

1. Human body grounding (Fig 4.2)

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

2. Work table grounding (Fig 4.2)

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

Caution :

The static electricity of your clothes will not be grounded through the wrist strap. So, take care not to let your clothes touch the traverse deck (optical pickup).

Fig 4.2

Caution when Replacing the Optical Pickup :

The traverse has a short point shorted with solder to protect the laser diode against electrostatics breakdown. Be sure to remove the solder from the short point before making connections.

SA-PM32DBEB

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 Accessories

Note : Refer to Packing Materials & Accessories (Section 22) for part number.

Remote control

AC cord

SA-PM32DBEB

FM indoor

antenna

AM loop antenna

Antenna

plug

adaptor

DAB antenna

SA-PM32DBEB

7 Operating Instructions Procedures

7.1. Main Unit Operation

7.2. Remote Control Operation

SA-PM32DBEB

7.3. Disc Information

SA-PM32DBEB

8 Self diagnosis and special mode setting

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

8.1. Special Mode Table

Below is the various special modes for checking:-

Item FL Display Key Operation

Mode Name Description Front Key

Self -Diagnostic

Mode

Doctor Mode To enter into Doctor

FL Display Test To check the FL

Volume Setting To Forced Volume

To enter into self diagnostic checking for main unit.

Mode for checking of various items and displaying EEPROM and firmware version. (For more information, refer to section 8.1.1)

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

segments display (All segments will light up)

Setting.

The Check Sum of EEPROM and firmware version will be display for 1 sec.

* ROM correction ** Firmware version No:

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

2. Press and hold [ seconds follow by [

To exit, press remote control.

In any mode:

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

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

In doctor mode:

1. Press [DIMMER] button on remote control.

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

In doctor mode:

1. Press [7] button on remote control.

2. Press [8] button on remote control.

3. Press [9] button on remote control.

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

button on main unit or

] button on main unit follow

button on main unit or remote

]button for 2 ].

Traverse Test To determine the

reliability of CD unit.

Cold Start To activate cold start ipon

next AC power up.

In doctor Mode:

1. Press [

To exit, press remote control.

In doctor mode:

1. Press [SLEEP] button on remote control.

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

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

button on main unit or

button on main unit or remote

8.1.1. EEPROM Checksum (ROM correction)

Purpose : To check for micro-processor firmware version & EEPRO M check (ROM correction).

Below is the procedures for this mode.

Step 1: Enter into Doctor mode (For more information refer to section 8.1 on key operation to enter into this mode.

Step 2: Check for firmware version & EEPRO M checksum.

· W hen entering into DOCTOR MODE the firmware version & checksum of EEPROM (if applicable) will appear on FL display .

Below is information on the EEPROM IC (Rom correction) under 3 examples:

1. When EEPROM IC is detected and there is no ROM correction:

SA-PM32DBEB

2. When EEPROM IC is detected and has ROM correction:

3. When EEPROM IC is detected and has ROM correction but NG:

Note: Micro-processor firmware version refers to version No. (Eg.MS079_12) for micro-processor IC.

It is subject to change which would update accordingly.

· Rom correction checksum refers to the hex code that is display upon key buttons pressed if an EEPROM is loaded in the unit.

(Main P.C.B)

8.2. Error Code Table

Self-Diagnosis Function provides information on any problems occuring for the unit and its respective components by display ing 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

F15 CD REST SW

Abnormal

F26 Communication

between CD servo LSI and micro-p abnormal.

POWER AMP output abnormal

CD traverse position intial setting operation failsafe counter (1000 ms) waiting for REST SW toturn 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 display shall be "NO DISC". Error No. shall be clear by force or cold start.

During normal operation, if DCDET becomes "L", normal POWER OFF process shall not be executed, PCONT shall be switched to "L" immediately. "GOODBYE" shall not be display but the error display F61 is displayed instead. 2 seconds after the F61 displayed, ECONO shall be set to "L" and FL display shall be turned off. The error content shall be memorized when the abnormality occurs and can be display in the C-mecha self-diagnostic mode described later.

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

For Power Supply Related Error Detection. Press [ error.

] on main unit for next

SA-PM32DBEB

9 Assembling and Disassembling

9.1. Caution

“ATTENTION SERVICER”

Some chassis components may be 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.

Warning:

This product uses a laser diode. Refer to “Precaution of Laser Diode”.

Below is the list of disassembly sections

· Disasse mbly of Side Panel L & R

· Disasse mbly of Top Cabinet Unit

· Disasse mbly of Headphone P.C.B.

· Disasse mbly of Front Panel

· Disasse mbly of DAB Module Unit

· Disasse mbly of Panel P.C.B.

· Disasse mbly of Rear Panel

· Disasse mbly of Tuner Pack

· Disasse mbly of Main P.C.B.

· Disasse mbly of Power P.C.B.

· Disasse mbly of Speaker Terminal P.C.B.

· Disasse mbly of Transformer P.C.B.

· Disasse mbly of CD Mechanism

· Disasse mbly of Traverse Unit, Driving Gear, and Cam Gear (CD Mechanism Unit)

· Disasse mbly of Optical Pickup (CD Mechanism Unit)

· Disasse mbly of Traverse Gear A and Traverse Gear B (CD Mechanism Unit)

SA-PM32DBEB

9.2. 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 below.

SA-PM32DBEB

9.3. Main Parts Location Diagram

SA-PM32DBEB

9.4. Disassembly of Side Panel L & R

· Disasse mbly of Side Panel (R)

Step 1: Remove 5 screws.

Step 2: Remove the side panel (R) as arrow shown.

9.5. Disassembly of Top Cabinet Unit

Step 1: Remove 3 screws.

· Disasse mbly of Side Panel (L)

Step 3: Remove 5 screws.

Step 4: Remove the side panel (L) as arrow shown.

Step 2: Remove 3 screws.

Step 3: Lift up the top cabinet unit, push backward as arrow shown and flip top cabinet unit sideway. (Be careful of the catch)

SA-PM32DBEB

Step 1: Detach connector (CN900B).

Step 4: Detach connector (CN504A).

Step 5: Remove top cabinet unit.

9.6. Disassembly of Headphone P.C.B.

· Follow the (Step 1) - (Step 5) of Item 9.5.

Step 2: Disconnect FFC cable (CN802 and CN809).

Step 3: Disconnect F-Connector.

Step 1: Remove 1 screw.

Step 2: Release the clutch.

Step 3: Remove the Headphone P.C.B.

9.7. Disassembly of Front Panel

· Follow the (Step 1) - (Step 4) of Item 9.4.

· Follow the (Step 3) - (Step 5) of Item 9.5.

Step 1: Remove 2 screws.

Step 2: Remove the DAB Module Unit

SA-PM32DBEB

Step 4: Release 3 claws.

Step 5: Remove the Front Panel as arrow shown.

9.8. Disassembly of DAB Module unit

· Follow the (Step 1) - (Step 4) of Item 9.4.

· Follow the (Step 3) - (Step 5) of Item 9.5.

· Follow the (Step 1) - (Step 5) of Item 9.7.

9.9. Disassembly of Panel P.C.B.

· Follow the (Step 1) - (Step 4) of Item 9.4.

· Follow the (Step 3) - (Step 5) of Item 9.5.

· Follow the (Step 1) - (Step 5) of Item 9.7.

· Follow the (Step 1) - (Step 2) of Item 9.8.

Step 1: Remove 8 screws.

Step 2: Remove the Volume Knob.

Step 3: Release 2 catches.

Step 4: Remove the Panel P.C.B.

9.10. Disassembly of Rear Panel

· Follow the (Step 1) - (Step 4) of Item 9.4.

· Follow the (Step 3) - (Step 5) of Item 9.5.

SA-PM32DBEB

Step 1: Detach the FFC CN801.

Step 1: Remove 5 screws.

Step 2: Remove 1 nut.

Step 3: Remove the Rear Panel as arrow shown.

9.11. Disassembly of Tuner Pack

· Follow the (Step 1) - (Step 4) of Item 9.4.

· Follow the (Step 3) - (Step 5) of Item 9.5.

· Follow the (Step 1) - (Step 3) of Item 9.10.

Step 1: Detach the connec tor CN401A and remove the tuner pack as arrow shown.

9.12. Disassembly of Main P.C.B.

· Follow the (Step 1) - (Step 4) of Item 9.4.

· Follow the (Step 3) - (Step 5) of Item 9.5.

· Follow the (Step 1) - (step 5) of Item 9.7.

· Follow the (Step 1) - (step 3) of Item 9.10.

Step 2: Detach connector CP800.

Step 3: Detach connector CN803B and CN808B.

Step 4: Remove the Main P.C.B. as arrow shown.

9.13. Disassembly of Power P.C.B.

· Follow the (Step 1) - (Step 4) of Item 9.4.

· Follow the (Step 3) - (Step 5) of Item 9.5.

· Follow the (Step 1) - (Step 3) of Item 9.10.

SA-PM32DBEB

Step 1: Detach the connector CN505B.

Step 5: Remove 3 screws.

Step 6: Unsolder the terminal of Power Amp IC (IC300) and replace the component.

Step 7: Unsolder the terminal of Transistor (Q503) and replace the component.

9.14. Disassembly of Speaker Terminal P.C.B.

Step 2: Remove 1 screw.

Step 3: Detach the connector CN501A, CN508A and CN503A.

Step 4: Remove the Power P.C.B. as arrow shown.

· Replacement of Power Amplifier IC

· Follow the (Step 1) - (Step 4) of Item 9.4.

· Follow the (Step 3) - (Step 5) of Item 9.5.

· Follow the (Step 1) - (step 3) of Item 9.10.

· Follow the (Step 3) of Item 9.12.

· Follow the (Step 1) - (step 4) of Item 9.13.

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