Sony PMCR-30-L Service manual

PMC-R30L

SERVICE MANUAL

Ver 1.0 1999. 07

CD

Section

TC

Section

AEP Model

UK Model

Model Name Using Similar Mechanism PMC-107L
CD Mechanism Type KSM-213CDM
Optical Pick-up Name KSS-213C
Model Name Using Similar Mechanism PMC-107L
T ape Transport Mechanism Type MF-107

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

2

Frequency response

20 - 20,000 Hz +1/–2 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

IF

FM: 10.7 MHz
MW/LW: 450 kHz

Aerials

FM: External aerial terminal
MW/LW: External aerial terminal

SPECIFICA TIONS

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): 70 - 10,000 Hz

General

Speaker

Full range: 10 cm dia.,
3 ohms, cone type (2)

Outputs

Headphones jack (stereo minijack)
For 16 - 68 ohms impedance headphones

Maximum power output

4.5 W + 4.5 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 23 W

– Continued on next page –

MICROFILM

PERSONAL COMPONENT SYSTEM

– 1 –

Dimensions (incl. projecting parts)

Player: Approx. 160 × 249 × 227 mm (w/h/d)
Speaker: Approx. 150 × 245 × 192 mm (w/h/d)

Mass

Player: Approx. 2.8 kg
Speaker: Approx. 1.2 kg

Supplied accessories

Remote control RMT-C107AD (1)
FM lead aerial (1)
MW/LW loop aerial (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 ........................................................... 6

3-2. Cabinet (Upper) Assy..........................................................7

3-3. Power Board........................................................................ 7

3-4. Main Board ......................................................................... 8

3-5. CD Board ............................................................................8

3-6. Optical Pick-up ................................................................... 9

3-7. Tape Mechanism Block ....................................................... 9

3-8. Control Board and Back Light Board ............................... 10

3-9. How to Apply the Belts ..................................................... 10

3-10. Head, Magnetic (HRP301)................................................ 11

3-11. Motor Assy (M301)........................................................... 11

4. MECHANICAL ADJUSTMENTS............................... 12

5. ELECTRICAL ADJUSTMENTS

Tape Section .......................................................................... 12

Tuner Section......................................................................... 13

CD Section ............................................................................ 14

6. DIAGRAMS

6-1. IC Pin Description............................................................. 15

6-2. Circuit Boards Location .................................................... 16

6-3. Block Diagram –CD Section–........................................... 17

6-4. Block Diagram –Main Section–........................................ 19

6-5. Printed Wiring Boards –CD Section– ............................... 21

6-6. Schematic Diagrams –CD Section– .................................. 23

6-7. Printed Wiring Boards –Control Section–......................... 25

6-8. Schematic Diagrams –Control Section– ........................... 27

6-9. Printed Wiring Boards –Main Section– ............................ 29

6-10. Schematic Diagram –Main Section (1/2)– ........................ 31

6-11. Schematic Diagram –Main Section (2/2)– ........................ 33

6-12. Printed Wiring Board –Power Supply Section– ................ 35

6-13. Schematic Diagram –Power Supply Section–................... 35

7. EXPLODED VIEWS

7-1. Cabinet (Rear) Section ...................................................... 40

7-2. Cabinet (Front) Section ..................................................... 41

7-3. Cabinet (Upper) Section.................................................... 42

7-4. Tape Mechanism Section-1 ............................................... 43

7-5. Tape Mechanism Section-2 ............................................... 44

7-6. Tape Mechanism Section-3 ............................................... 45

7-7. Tape Mechanism Section-4 ............................................... 46

7-8. Optical Pick-up Section .................................................... 47

7-9. Speaker Section ................................................................. 48

8. ELECTRICAL PARTS LIST......................................... 49

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE
WITH MARK ! ON THE SCHEMATIC DIAGRAMS AND IN
THE PARTS LIST ARE CRITICAL TO SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE
P AR T NUMBERS APPEAR AS SHO WN IN THIS MANUAL OR
IN SUPPLEMENTS PUBLISHED BY SONY.

– 2 –

SECTION 1

SERVICING NOTES

CHUCK PLATE JIG ON REPAIRING

On repairing CD section, playing a disc without the lid (CD), use
Chuck Plate Jig.

• Code number of Chuck Plate Jig: X-4918-255-1

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.

LASER DIODE AND FOCUS SEARCH OPERATION
CHECK

1. Open the CD lid.

2. Turn OPERATE switch on with to set the CD.

3. Turn on SW701 as following figure.

4. Press the ^ (CD) button.

5. Confirm the laser diode emission while observing the objecting
lens. When there is no emission, Auto Po wer Control circuit or
Optical Pick-up is broken.
Objective lens moves up and do wn three times for focus search.

Push on SW701 in the
arrowed direction with
a screwdriver, etc.

SW701

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.

This Compact Disc player is classified as a
CLASS 1 LASER product.
The CLASS 1 LASER PRODUCT table is
location on the rear exterior.

CAUTION

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

– 3 –

SECTION 2

GENERAL

This section is extracted
from instruction manual.

– 4 –

– 5 –

SECTION 3

g

4

3

DISASSEMBLY

• The equipment can be removed using the following procedure.

Set

Note : Follow the disassembly procedure in the n umerical order given.

Cabinet (Front) assy

Cabinet (Upper) assy

Power board
Tape mechanism block

Control board and Back Li

Main board
CD board

Optical pick-up
How to apply the belts
Head, magnetic (HRP301)

ht board

Motor assy (M301)

3-1. CABINET (FRONT) ASSY

1

BVTP 3x14

3

BVTP 3x14

2

BVTP 3x1

!¡

cabinet (front) assy

8

CNP308

5

CNP306

7

CNP302

9

CNP702

4

CNP30

0

wire

6

CNP301

– 6 –

3-2. CABINET (UPPER) ASSY

5

cabinet (upper) assy

3

BVTP 3x10

2

BVTP 3x10

1

BVTP 3x10

3-3. POWER BO ARD

4

CNP901

2

BVTP 4x16

1

CNP902

– 7 –

3

POWER board

3-4. MAIN BOARD

1

CNP704

3

MAIN board

2

BVTP 3x10

3-5. CD BOARD

4

6

sheet, plastic

7

CD board

3

BVTP 3x10

2

connector

CNP703

5

BVTP 3x10

1

CNP701

– 8 –

3-6. OPTICAL PICK-UP

3

optical pick-up

2

screws (2.6x16)

1

screws (2.6x16)

3-7. TAPE MECHANISM BLOCK

2

BVTP 3x10

4

tape mechanism block

3

BVTP 3x10

– 9 –

1

Open the cassette lid.

3-8. CONTROL BOARD AND BACK LIGHT BOARD

F

6

BVTP 3x8

8

5

CNP801

7

BVTP 3x10

knob (SNOOZE)

9

BACK LIGHT board

1

BVTP 3x10

3

CNP802

2

BVTP 3x10

4

CONTROL board

3-9. HOW TO APPLY THE BELTS

2

belt

motor assy (M301)

FW assy

1

belt

idler assy, P

– 10 –

3-10. HEAD, MAGNETIC (HRP301)

3-11. MOTOR ASSY (M301)

1

PTT 2x4

3

head, magnetic (HRP301)

2

screw

holder, motor

1

spring

3

claw

5

motor assy (M301)

2

BVTT 2.6x5

4

PTT 2.6x6

– 11 –

SECTION 4

MECHANICAL ADJUSTMENTS

SECTION 5

ELECTRICAL ADJUSTMENTS

PRECAUTION

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

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

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

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 CQ-102C

FWD
Back Tension (0.021 – 0.076 oz • inch)

FF CQ-201B

REW CQ-201B

CQ-102C

30 – 70 g • cm

(0.42 – 0.97 oz • inch)

1.5 – 5.5 g • cm

more than 60 g • cm

(more than 0.83 oz • inch)

more than 60 g • cm

(more than 0.83 oz • inch)

TAPE SECTION 0 dB = 0.775 V

• Standard Output Level
Output terminal HP OUT

load impedance 32 Ω

output signal level 0.25 V (–10 dB)

• Test Tape

Type Signal Used for

WS-48A 3 kHz, 0 dB tape speed adjustment

T ape Speed Adjustment

Procedure:

Mode: playback

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

set

phones jack (J302)

digital frequency
counter

Ω

32

T ape Tension Measurement

Mode Tension meter Meter Reading

FWD CQ-403A

more than 100 g

(more than 3.53 oz)

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

Specification Value:

Digital frequency counter

2,985 to 3,015 Hz

Adjust so that the frequency at the beginning and that at the end of
tape winding are between 2,955 to 3,045 Hz.

Adjustment Location:

TAPE SPEED
Adjustment

– 12 –

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

0.01

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

• MW/LW Section

Setting:

BAND button: MW or LW

AM RF signal
generator

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

• Connecting Level Meter (FM, MW and LW)

FM terminal
(CNP2)

µ

F

set

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

FM FREQUENCY COVERAGE

CHECK

Frequency Display 87.5 MHz 108 MHz
Reading on Digital voltmeter 1.8 ± 0.2 V 5.6 ± 0.2 V
Adjustment Part <confirmation> <confirmation>

FM TRACKING CHECK

Adjust for a maximum reading on level meter.

<confirmation> <confirmation>

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 5.6 ± 0.2 V
Adjustment Part L5 CT4

MW TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter.

L3 CT2

621 kHz 1,404 kHz

AM IF ADJUSTMENT

Adjust for a maximum reading on level meter.

CFT1

450 kHz

level meter
(range: 0.5-5 V ac

Ω

32

set

phones jack (J302)

• 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 0.6 ± 0.1 V 5.3 ± 0.2 V
Adjustment Part CT3 <confirmation>

L W TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter.

L4 CT1

162 kHz 261 kHz

Adjustment Location: MAIN board (See page 14.)

– 13 –

Adjustment Location:

– MAIN board (component side) –

CNP2

LW

TRACKING

ADJUSTMENT

TU1

TP (VT) (conductor side)

L4

CT1

CFT1

AM IF

ADJUSTMENT

IC1

L3

CT2

ADJUSTMENT

MW

TRACKING

CT3

FREQUENCY

COVERAGE

ADJUSTMENT

LW

CT4

L5

MW

FREQUENCY

COVERAGE

ADJUSTMENT

CD SECTION

CD section adjustments are done automatically in this set.
In case of operation check, confirm that focus bias.

FOCUS BIAS CHECK

1. Connect the oscilloscope between IC701 pin #£ (TP RF) and
GND on CD board.

2. Set the Test Disc YEDS-18 (CD). (Part No. : 3-702-101-01)

3. Press the ^ (CD) button.

4. Confirm that the oscilloscope waveform is as shown in the
figure below. (eye pattern)
A good eye pattern means that the diamond shape ( ) in the
center of the waveform can be clearly distinguished.

• RF signal reference waveform (eye pattern)

VOLT/DIV : 200 mV (10 : 1 probe in use)
TIME/DIV : 500 nS

RF level :

±

0.1 Vp-p

1.2

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

π

Test Point:

– CD board (conduction side) –

C709

52

1

IC701

13

14

R725

27

C723

26

R726

C737

R740

C738

TP (RF)

39

C707

40

C724

C706

C705

C717

C721

R706

JW705

R721

R704
R701

C711

R720

JW703

16
CNP701

C712

1

R715

C715

JW713

R717

– 14 –

SECTION 6
DIAGRAMS

6-1. IC PIN DESCRIPTION

• IC801 CXP83232A-015Q (SYSTEM CONTROL)

Pin No. Pin Name I/O Pin Description

1 REG I AC check input
2 C-SCOR I CD-SCOR input
3 RMC I SIRCS receiver input

4, 5 NC — Not used.

6 C-SENS I CD SENS-1 input
7 C-SENS2 I CD SENS-2 input
8 RDS-CLK O Tuner demodulator clock output

9 RDS-DATA O Tuner demodulator data output
10 C-XRST O CD system reset output
11 C-SQCK O Clock output for CD SUB-Q.
12 C-SQSO I CD SUB-Q input
13 A-MUTE O Mute signal output for audio.
14 R-ST I Stereo detection input
15 R-COUNT I Tuner PLL IC count input
16 R-DATA O Tuner PLL IC data output
17 R-CLK O Tuner PLL IC clock output
18 R-CE O Tuner PLL IC chip enable output
19 V-CE O Electrical volume chip enable output
20 V-DAT O Volume data output
21 V-CLK O Volume clock output
22 C-CLK O Clock output for CD-DSP command.
23 C-XLAT O CD-DSP command latch output
24 C-DATA O CD-DSP command data output
25 PA-CON O Power on/off control output
26 REG-CON O Regulator on/off control output. LED (STANDBY) control signal output.
27 C-MUTE O Mute signal output for CD.
28 BACKLIGHT-ON O Not used.
29 RDS-IND O Not used.

30 – 32 KEY1 – 3 I Key return signal input

33 VER I Mode setting terminal
34 C-DOOR I CD lid open/close detection input
35 NC — Not used.
36 9/10K I Not used.
37 SHIFT-CLK O Shift clock on/off output
38 RST I Reset signal input
39 EXTAL I Clock oscillation input (8 MHz)
40 XTAL O Clock oscillation output (8 MHz)
41 VSS — Ground (for A/D converter)

42, 43 NC — Not used.

44 AVREF I Reference voltage input (for A/D convereter)
45 AVSS — Ground (for A/D converter)
46 VL O LCD bias resistor current control terminal (Cut off at standby)

47 – 49 VLC3 – 1 — LCD bias power supply terminal
50 – 53 COM0 – 3 O LCD common signal output terminal
54 – 73 SEG0 – 19 O LCD segment signal output terminal

74 RADIO O Regulator on/off control output for radio block.
75 TAPE O Regulator on/off control output for tape block.
76 CD O Regulator on/off control output for CD block.

Pin No. Pin Name I/O Pin Description

77 – 88 SEG20 – 31 O LCD segment signal output terminal

89 VDD — Power supply (+ 5V)
90 NC — Connected to VDD.
91 VSS — Ground
92 TX O Crystal connection for clock oscillation. (32.768 kHz)
93 TEX I Crystal connection for clock oscillation. (32.768 kHz)

94 – 98 SEG32 – 36 O LCD segment signal output terminal

99 REC I Tape REC detection signal input (from SW301)

100 PLAY I Tape PLAY detection signal input (from S302)

6-2. CIRCUIT BOARDS LOCATION

MAIN board

CD board

BACK LIGHT board

CONTROL board

HEADPHONE board

KEY board

REC SW board

CD MOTOR board

POWER board

– 15 – – 16 –