Sony PMC-DR45L Service manual

PMC-DR45L

SERVICE MANUAL

Ver 1.0 2000. 03

Section

Tape

Section

AEP Model

UK Model

E Model

Model Name Using Similar Mechanism CFD-S45L/S47L CD Loading Mechanism Type FLM-DR45-149 CD Mechanism Type KSM-213CCP Optical Pick-up Name KSS-213C Model Name Using Similar Mechanism PMC-DR50L/DR70L Tape Transport Mechanism Type MF-DR45

CD player section

System

Compact disc digital audio system

Laser diode properties

Material: GaAlAs Wave length: 780 nm Emission duration: Continuous Laser output: Less than 44.6 µW (This output is the value measured at a distance of about 200 mm from the objective lens surface on the optical pick-up block with 7 mm aperture.)

Spindle speed

200 r/min (rpm) to 500 r/min (rpm) (CLV)

Number of channels

Frequency response

20 - 20,000 Hz +0/–1 dB

Wow and flutter

Below measurable limit

Radio section

Frequency range

FM 87.5 - 108 MHz MW 531 - 1,602 kHz LW 153 - 279 kHz

FM: 10.7 MHz MW/LW: 450 kHz

Aerials

FM: Lead aerial MW/LW: Loop aerial

Cassette-corder section

Recording system

4-track 2-channel stereo

Fast winding time

Approx. 120 s (sec.) with Sony cassette C-60

Frequency response

TYPE I (normal): 50 - 14,000 Hz

SPECIFICATIONS

General

Speaker

Full range: 8 cm (3 1/4 in.) dia., 4 ohms, cone type × 2

Input

LINE IN jack (stereo minijack) Minimum input level 440 mV

Outputs

Headphones jack (stereo minijack) For 16 - 64 ohms impedance headphones LINE OUT jack (stereo minijack) Rated output level 330 mV at load impedance 47 kilohms OPTICAL DIGITAL OUT (CD) (optical output connector) Wave length: 760 - 880 nm

Maximum power output

15 W + 15 W

Power requirements

For personal component system: 230 V AC, 50 Hz For remote control: 3 V DC, 2 R6 (size AA) batteries

Power consumption

AC 45 W

– Continued on next page –

PERSONAL COMPONENT SYSTEM

– 1 –

Dimensions (incl. projecting parts)

Player: approx. 137 × 212 × 202 mm (w/h/d)

(5 1/2 × 8 3/8 × 8 inches)

Left speaker: approx. 137 × 212 × 202 mm

(w/h/d) (5 1/2 × 8 3/8 × 8 inches)

Right speaker: approx. 137 × 180 × 202 mm

(w/h/d) (5 1/2 × 7 1/8 × 8 inches)

Mass

Player: approx. 1.8 kg (3 lb. 15 oz.) Left speaker: approx. 3 kg (6 lb. 10 oz.) Right speaker: approx. 1.5 kg (3 lb. 5 oz.)

Supplied accessories

Remote control (1) FM lead aerial (1) MW/LW loop aerial (1) Audio connecting cord (1)

Design and specifications are subject to change without notice.

TABLE OF CONTENTS

1. SERVICING NOTES......................................................... 3

2. GENERAL

Playing a CD ........................................................................... 4

Listening to the radio............................................................... 4

Playing a tape .......................................................................... 5

Recording on a tape .................................................................5

3. DISASSEMBLY

3-1. Cabinet (Front) Assy ...........................................................7

3-2. Cabinet (Rear) ..................................................................... 8

3-3. Front Board ......................................................................... 8

3-4. Control Board...................................................................... 9

3-5. Line Board........................................................................... 9

3-6. Tuner Board ....................................................................... 10

3-7. Holder, Cassette ................................................................ 10

3-8. Top Block Assy ................................................................. 11

3-9. CD Mechanism Block .......................................................11

3-10. H/P Board.......................................................................... 12

3-11. Main Board ....................................................................... 12

3-12. Tape Mechanism Block ..................................................... 13

3-13. T op Board ..........................................................................13

3-14. Plate Assy, Chuck ..............................................................14

3-15. Tray ................................................................................... 14

3-16. Loading Board................................................................... 15

3-17. CD Board ..........................................................................15

3-18. CD Mechanism Block .......................................................16

3-19. Power Board...................................................................... 16

4. MECHANICAL ADJUSTMENTS...............................17

5. ELECTRICAL ADJUSTMENTS

5-1. Tape Section ...................................................................... 17

5-2. Tuner Section .................................................................... 19

5-3. CD Section ........................................................................ 21

6. DIAGRAMS

6-1. IC Pin Descriptions ........................................................... 24

6-2. Circuit Boards Location .................................................... 26

6-3. Block Diagram –Tuner Section–....................................... 27

6-4. Block Diagram –CD Section–........................................... 29

6-5. Block Diagram –Tape Section– ........................................ 31

6-6. Block Diagram –System Control, Power Section– ...........33

6-7. Printed Wiring Board –Tuner Section– ............................. 35

6-8. Schematic Diagram –Tuner Section–................................ 37

6-9. Printed Wiring Boards –CD Section– ............................... 39

6-10. Schematic Diagram –CD Section–.................................... 41

6-11. Printed Wiring Board –TC Section– ................................. 43

6-12. Schematic Diagram –TC Section– .................................... 45

6-13. Printed Wiring Board –Main Section– .............................. 47

6-14. Schematic Diagram –Main Section–................................. 49

6-15. Printed Wiring Board –Control Section– .......................... 51

6-16. Schematic Diagram –Control Section– .............................55

6-17. Printed Wiring Board –Front Section– .............................. 57

6-18. Schematic Diagram –Front Section– ................................ 58

6-19. Printed Wiring Board –Top Section– ................................ 59

6-20. Schematic Diagram –Top Section– ................................... 60

6-21. Printed Wiring Board –Line Section– ............................... 61

6-22. Schematic Diagram –Line Section–.................................. 61

6-23. Printed Wiring Boards –Power Section– ...........................63

6-24. Schematic Diagram –Power Section– ...............................65

6-25. IC Block Diagrams............................................................ 67

7. EXPLODED VIEWS

7-1. Cabinet Section ................................................................. 72

7-2. Cabinet (Top) Section ....................................................... 73

7-3. CD Chassis Section ...........................................................74

7-4. Mechanism Deck Section (1) ............................................ 75

7-5. Mechanism Deck Section (2) ............................................ 76

7-6. Optical Pick-up Section .................................................... 77

7-7. Speaker (L) Section........................................................... 78

7-8. Speaker (R) Section........................................................... 79

8. ELECTRICAL PARTS LIST.........................................80

– 2 –

SECTION 1

SERVICING NOTES

This Compact Disc player is classified as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT lable is located on the bottom exterior.

CAUTION

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

Flexible Circuit Board Repairing

• Keep the temperature of the soldering iron around 270˚C during

repairing.

• Do not touch the soldering iron on the same conductor of the

circuit board (within 3 times).

• Be careful not to apply force on the conductor when soldering

or unsoldering.

Notes on Chip Component Replacement

• Never reuse a disconnected chip component.

• Notice that the minus side of a tantalum capacitor may be dam-

aged by heat.

NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT

The laser diode in the optical pick-up block may suffer electrostatic breakdown because of the potential difference generated by the charged electrostatic load, etc. on clothing and the human body. During repair, pay attention to electrostatic breakdo wn and also use the procedure in the printed matter which is included in the repair parts. The flexible board is easily damaged and should be handled with care.

NOTES ON LASER DIODE EMISSION CHECK

The laser beam on this model is concentrated so as to be focused on the disc reflective surface by the objective lens in the optical pickup block. Therefore, when checking the laser diode emission, observe from more than 30 cm away from the objective lens.

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE P ART NUMBERS APPEAR AS SHOWN IN THIS MANU AL OR IN SUPPLEMENTS PUBLISHED BY SONY.

– 3 –

SECTION 2

GENERAL

This section is extracted from instruction manual.

– 4 –

– 5 –

– 6 –

SECTION 3

DISASSEMBLY

• The equipment can be removed using the following procedure.

Set Cabinet (Front) Assy

Cabinet (Rear) Front Board

Control Board Tuner Board Line Board Holder, Cassette

Top Block Assy

Main Board

CD Chassis Block

Loading Board CD Board CD Mechanism Block

Speaker Set Power Board

Note : Follow the disassembly procedure in the numerical order given.

Tape Mechanism Block (TC Board)

3-1. CABINET (FRONT) ASSY

5 cabinet (front) assy

Top Board

H/P Board Plate Assy, Chuck Tray

4 CNP802

1 BVTP 3x12

2 BVTP 3x12

3 BVTP 3x1

– 7 –

3-2. CABINET (REAR)

4 cabinet (rear)

3 BVTP 3x1

2 BVTP 3x10

3-3. FRONT BOARD

1 BVTP 3x10

1 BTP 2.6x8

2 BTP 2.6x8

3 FRONT boar

– 8 –

3-4. CONTROL BOARD

4 BVTP 3x10

5 CONTROL board

1 CNP804

2 CNP803

6 CNP307

3 BVTP 3x10

3-5. LINE BOARD

1 CNP304

3 CNP312

4 LINE board

– 9 –

2 BVTP 3x10

3-6. TUNER BOARD

1 screw

3-7. HOLDER, CASSETTE

5 Removal the solder.

4 CNP1

2 boss

6 TUNER board

2 BVTP 3x10

3 BVTP 3x10

4 holder, cassette

3 boss

1 spring, cassette

– 10 –

3-8. TOP BLOCK ASSY

1 CNP306

5 top block assy

CD block assy

2 connector

3 claws

4 claw

3-9. CD CHASSIS BLOCK

6 plate, CD

3 CD chassis block

5 CNP70

4 CNP702

1 BVTP 3x10

2 BVTP 3x10

– 11 –

3-10. H/P BOARD

1 BVTP 3x10

2 H/P board

3-11. MAIN BOARD

5 connecto

3 MAIN board

4 CNP302

2 BVTP 3x10

1 BVTP 3x10

– 12 –

3-12. TAPE MECHANISM BLOCK (TC BOARD)

3 tape mechanism bloc

3-13. T OP BOARD

2 BVTP 3x10

4 connector

7 BVTP 3x10

3 panel assy, top

6 TOP board

1 BVTP 3x10

8 holder MD

6 TC board

5 BVTP 3x10

5 BTP 2.8x8

1 BVTP 3x10

2 BVTP 3x10

– 13 –

4 BTP 2.8x8

3-14. PLATE ASSY, CHUCK

2 plate assy, chuck

1 P 2.6x8

3-15. TRA Y

2 claw

3 claw

5 tray

– 14 –

3-16. LOADING BOARD

1 belt

5 B 2x3

4 CN651

6 claw

3 pulley

3-17. CD BOARD

2 claw

7 claw

8 LOADING board

3 CNP701

4 CD board

1 Removal the

four solders.

2 P 2x5

– 15 –

3-18. CD MECHANISM BLOCK

1 PWH 2.6x10

2 gear, drive

3 gear

0 arm

4 PWH 2.6x10

qa CD mechanism bloc

8 PWH 2.6x10

CD mechanism block

chassis

arm

3-19. POWER BOARD

5 CNP903

qs BVTP 3x10

6 CNP911

qd B 4x6

qf power board

7 CNP901

4 bracket, cover

0 speaker board

9 BVTP 3x10

1 scews +B tapping

8 CNP902

qa BVTP 3x10

2 scews +B tapping

– 16 –

3 cabinet (rear), speaker

32 Ω

test tape WS-48B (3 kHz, 0 dB)

set

i (headphones) jack (J301)

digital frequency counter

SECTION 4

MECHANICAL ADJUSTMENTS

SECTION 5

ELECTRICAL ADJUSTMENTS

PRECAUTION

1. Clean the following parts with a denatured-alcohol-moistened swab:

record/playback/erase head pinch roller rubber belts capstan idlers

2. Demagnetize the record/playback/erase head with a head demagnetizer. (Do not bring the head demagnetizer close to the erase head portion.)

3. Do not use a magnetized screwdriver for the adjustments.

4. After the adjustments, apply suitable locking compound to the parts adjusted.

5. The adjustments should be performed with the rated power supply voltage unless otherwise noted.

Torque Measurement

Mode Torque Meter Meter Reading

FWD FWD 2.0 – 6.0 g•cm

Back tension (0.028 – 0.076 oz•inch) REV REV 2.0 – 6.0 g•cm

Back tension (0.028 – 0.076 oz•inch) FF, REW CQ-201B

CQ-102C

CQ-102RC

36 – 61 g•cm

(0.50 – 0.89 oz•inch)

36 – 61 g•cm

(0.50 – 0.89 oz•inch)

61 – 143 g•cm

(0.89 – 2.00 oz•inch)

5-1. TAPE SECTION 0 dB = 0.775 V

1. The adjustments should be performed in the order given in the service manual. (As a general rule. Playback circuit adjustment should be completed before performing recording circuit adjustment.)

2. The adjustments should be performed for both L-ch and R-ch unless otherwise indicated.

Standard Output Level

SP OUT PHONES

Load impedance 4 Ω 32 Ω Output level 0.775 V (0 dB) 0.25 V (–10 dB)

Test T ape

Type Signal Used for

WS-48B 3 kHz, 0 dB Tape speed adjustment P-4-A100 10 kHz, –10 dB Head azimuth adjustment

Tape Speed Adjustment

Procedure:

Mode: playback

T ape Tension Measurement

Mode Tension Meter Meter Reading

FWD CQ-403A REV CQ-403R

(more than 3.52 oz)

more than 100 g

Adjust so that the value on the frequency counter is 3,000 Hz.

Specification V alues:

Digital frequency counter

2,970 to 3,030 Hz

Adjust so that the frequency at the beginning and that at the end of tape winding are between 2,970 and 3,030 Hz.

Adjustment Location:

TC board

M691

TAPE SPEED Adjustment

– 17 –

Record/Playback/Erase Head Azimuth Adjustment

Procedure:

1. Mode: FWD/REV playback

test tape P-4-A100 (10 kHz, –10 dB)

set

i (headphones) jack (J301)

level meter

32 Ω

+ –

2. Turn the adjustment screw for the maximum output levels. If these levels do not match, turn the adjustment screw

until both

of output levels match together within 1 dB.

Adjustment Location:

screwdriver

FWD (forward)

REV (reverse)

L-CH peak

R-CH

screw position

peak

3. Phase Check Mode: FWD/REV playback

test tape P-4-A100 (10 kHz, –10 dB)

L-CH

set

R-CH

within 1dB

output level

L-CH peak

32 Ω

i (headphones) jack (J301)

Screen pattern

R-CH peak

oscilloscope

within 1dB

scre angle

–

in phase 45 ° 90 ° 135 ° 180 °

Good Wrong

4. After the adjustment, lock the screws with locking compound.

– 18 –

5-2. TUNER SECTION 0 dB = 1 µV

)

Precautions in Repairing

Note : As a tuner unit (TU1) is difficult to repair if faulty,

replace it with new one.

• FM Section

Setting:

BAND button: FM

FM RF signal generator

FM termina (J1)

0.01 µF set

22.5 kHz frequency deviation by 400 Hz signal output level : as low as possible

• MW/L W Section

Setting:

BAND button: MW or LW

AM RF signal generator

Put the lead-wire antenna close to the MW/LW loop antenna.

30% amplitude modulation by 400 Hz signal output level : as low as possible

• Connecting Level Meter (FM, MW and LW)

FM FREQUENCY COVERAGE

CHECK

Frequency Display 87.5 MHz 108 MHz Reading on Digital voltmeter 1.4 ± 0.2 V 6.9 ± 0.2 V Adjustment Part <confirmation> <confirmation>

FM TRACKING CHECK

Adjust for a maximum reading on level meter.

87.5 MHz 108 MHz

MW FREQUENCY COVERAGE

ADJUSTMENT

Frequency Display 531 kHz 1,611 kHz Reading on Digital voltmeter 0.9 ± 0.1 V 4.9 ± 0.5 V Adjustment Part L5 <confirmation>

AM IF ADJUSTMENT

Adjust for a maximum reading on level meter.

450 kHz

MW TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter.

L3 CT1

621 kHz 1,404 kHz

level meter (range: 0.5-5 V ac

32 Ω

set

i (headphones) jack (J301)

• Connecting Digital Voltmeter (FM, MW and LW)

digital voltmeter

tuner board TP (VT)

• Repeat the procedures in each adjustment several times, and the frequency coverage and tracking adjustments should be finally done by the trimmer capacitors.

LW FREQUENCY COVERAGE

ADJUSTMENT

Frequency Display 153 kHz 279 kHz Reading on Digital voltmeter 0.7 ± 0.2 V 5.2 ± 0.1 V Adjustment Part <confirmation> CT3

L W TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter.

L4 CT2

162 kHz 261 kHz

Adjustment Location: TUNER board (See page 20.)

– 19 –

Adjustment Location:

– TUNER BOARD (COMPONENT SIDE) –

TERMINAL

CT3

FREQUENCY

COVERAGE

ADJUSTMENT

CT1

TRACKING

ADJUSTMENT

TP(VT)

FREQUENCY

COVERAGE

ADJUSTMENT

CT2

TRACKING

ADJUSTMENT

– 20 –

5-3. CD SECTION

)

Notes on Check

1. Perform the traverse check in the CD test mode.

After check, be sure to exit the test mode.

2. Perform check in the order given.

3. Use the disc (YEDS-18, Parts No. 3-702-101-01) only when so

indicated.

Before check

Put the set into test mode and perform the following checks. Repair if there are any problems.

• Sled Motor Check

Press >, . keys and confirm that the Optical pick-up moves smoothly from the innermost to outermost circumference and back smoothly and with no catching or abnormal noises. (Cancellation of BTL mute)

> : Optical pick-up moves to the outer circumference. . : Optical pick-up moves to the inner circumference.

• Focus Search Check

1. Press the CD u key. (Focus search operation is performed

continuously.)

2. Look at the Optical pick-up objective lens and confirm that it

moves up and down smoothly, with no catching or abnormal noises.

3. Press x button.

Confirm that focus search operation stops. If it does not, press x button again longer.

How to Enter the Set into Test Mode

1. Set the function switch to power off.

2. Set the function switch to CD while MODE key and > key

pressing. The set is into CD test mode (88 is displayed).

3. Turn the power off to release test mode.

TRAVERSE Check

This check is to be done when the optical pick-up block is replaced.

Check Procedure:

1. Connect the oscilloscope to test point TP (VC) and TP (TE) on MAIN board. Insert disk (YEDS-18).

2. Put the set into test mode.

3. Optical pick-up setting to the center by > or . button pushing.

4. Press u button.

5. Check that the oscilloscope traverse wav eform is symmetrical, as shown in the figure below.

6. Release test mode after adjustment is completed.

VOLT/DIV: 0.1 V TIME/DIV: 1 ms (with the 10:1 probe in use.

1.2-1.8Vp-p

Focus Bias Check

This check is to be done when the optical block replaced.

Check Procedure:

1. Connect the oscilloscope to test point TP (VC) and TP (RF) on MAIN board. Insert disk (YEDS-18).

2. Put the set into test mode.

3. Optical pick-up setting to the center by + or – button pushing.

4. Press the u button and press the DISPLAY ENTER button. (Tracking servo ON)

5. Check that the oscilloscope waveform is as shown in the f igure below (eye pattern). A good eye pattern means that the diamond shape ( ) in the center of the waveform can be clearly distinguished.

6. Release test mode after adjustment is completed.

• RF signal reference waveform (eye pattern)

How to Exit the Test Mode

Turn the POWER OFF.

VOLT/DIV : 50mV TIME/DIV : 500 ns (With the 10:1 probe in use)

1.1- 1.3 Vp-p

When observing the eye pattern, set the oscilloscope for AC range and raise vertical sensitivity.

– 21 –

Focus/Tracking Gain Check

Adjustment Location: CD board (Component side)

A frequency response analyzer is necessary in order to perform this check exactly. However , this gain has a margin, so e ven if it is slightly of f, there is no problem. Focus/Tracking gain determines the pick-up follo w-up (vertical and horizontal) relative to mechanical noise and mechanical shock when the 2-axis device operate.

Symptoms

Gain

• The time until music starts becomes longer for STOP , CD u or automatic selection (m, M buttons pressed). (Normally takes about 2 seconds.)

• Music does not start and disc continues to rotate for STOP , CD u or automatic selection (m, M buttons pressed).

• Sound is interrupted during PLAY. Or time counter display stops progressing.

• More noise during 2-axis device operation.

Focus Tracking

low low or high

––– low

high high

Check Procedure:

1. Keep the set horizontal.

2. Inset disk (YEDS-18) and press u button.

3. Connect an oscilloscope to TP (FE) and TP (VC) on the CD board.

4. Check that the waveform is as shown in the f igure below. (Focus waveform)

VOLT/DIV: 100 mV TIME/DIV: 2 ms

100 mV

75 mV

0 V

high focus gain

5. Connect an oscilloscope between TP (TE) and TP (VC).

6. Insert disc (YEDS-18) and press the CD u button.

7. Check that the waveform is as shown in the figure below. (tracking waveform)

VOLT/DIV: 0.2 V TIME/DIV: 2 ms

0 V

• Incorrect Examples (Fundamental wave appears)

VOLT/DIV: 0.2 V TIME/DIV: 2 ms

0 V

low tracking gain

• Good Example

VOLT/DIV: 100 mV TIME/DIV: 1 ms

100 mV

0 V

• Incorrect Examples (DC level changes more than on adjusted waveform)

VOLT/DIV: 100 mV TIME/DIV: 2 ms

200 mV

0 V

low focus gain

VOLT/DIV: 0.2 V TIME/DIV: 2 ms

0 V

high tracking gain (high fundamental wave than for low gain)

– 22 –

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