Sony Pmc-dr50 User manual

Ver 1.0 2000.03

PMC-DR50

SERVICE MANUAL

PERSONAL COMPONENT SYSTEM

SPECIFICATIONS

TAPE Model Name Using Similar Mechanism NEW

Section Tape Transport Mechanism Type MF-PMCDR50

CD Model Name Using Similar Mechanism NEW

Section MD Mechanism Type KSM-213CCP

Optical Pick-up Type KSS-213C

– Continued on page 2 –

US Model

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– 2 –

Specifications ........................................................................... 1

1. SERVICE NOTE........................................................... 3

2. GENERAL ...................................................................... 4

3. DISASSEMBLY

3-1. Case(bottom), “Cover ASSY, Top” .......................... 6

3-2. CD ASSY.................................................................. 7

3-3. Main Board, Jack Board ........................................... 7

3-4. Tray ........................................................................... 8

3-5. ASP Board ................................................................ 8

3-6. Belt ........................................................................... 9

3-7. Motor Board, Loading Motor (M651) ...................... 9

3-8. Optical Pick-up Block ............................................ 10

3-9. Mechanism Deck .................................................... 10

3-10. TC RF Board, Head Relay Board,

Capstan/Reel Motor (M160) ...................................11

3-11. Control Board ..........................................................11

3-12. Display Board ......................................................... 12

3-13. DSP Board, CPU board .......................................... 12

3-14. VOL Board ............................................................. 13

3-15. “Cabinet, Wood”, “Cabinet (R) Bottom” ............... 13

3-16. Speaker (R-CH) (SP101) ........................................ 14

3-17. Power Board ........................................................... 14

3-18. AMP Board, AMP IC Board ................................... 15

3-19. Speaker Board ........................................................ 15

4. ADJUSTMENTS

4-1. Mechanical Adjustments........................................... 16

4-2. Electrical Adjustments .............................................. 16

5. DIAGRAMS

5-1. Explanation of IC Terminals................................... 19

5-2. Block Diagrams – CD, Tuner Section – ................. 22

5-3. Block Diagrams – Tape, Main Section– ................. 25

5-4. Printed Wiring Boards – Main Section– ................. 29

5-5. Schematic Diagram – Main Section (1/3) – ........... 33

5-6. Schematic Diagram – Main Section (2/3) – ........... 36

5-7. Schematic Diagram – Main Section (3/3) – ........... 39

5-8. Printed Wiring Boards – CD Section –................... 42

5-9. Schematic Diagram – CD Section – ....................... 45

5-10. Schematic Diagram – Control Section – ................ 49

5-11. Printed Wiring Boards – Control Section – ............ 53

5-12. Printed Wiring Boards – AMP Section – ................ 57

5-13. Schematic Diagram – AMP Section – .................... 59

6. EXPLODED VIEWS

6-1. Case Section ........................................................... 65

6-2. Control Section ....................................................... 66

6-3. CD Mechanism Section .......................................... 67

6-4. Mechanism Deck Section -1................................... 68

6-5. Mechanism Deck Section -2................................... 69

6-6. CD Optical Pick-up Section ................................... 70

6-7. Speaker (R-CH) Section ......................................... 71

6-8. Speaker (L-CH) Section ......................................... 72

7. ELECTRICAL PARTS LIST................................... 73

TABLE OF CONTENTS

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–3 –

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 breakdown 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 pick-

up block. Therefore, when checking the laser diode emission, ob-

serve more than 30 cm away from the objective lens.

LASER DIODE AND FOCUS SEARCH OPERATION

CHECK

1. Close the Tray for CD.

2. Press CD ^button.

3. Confirm the laser diode emission while observing the objecting

lens. When there is no emission, Auto Power Control circuit or

Optical Pick-up is broken.

Objective lens moves up and down once for the focus search.

ABOUTTHE EXTENSION CABLE JIG

Extention cable jigs (1-792-164-11, 1-792-165-11, 1-792-223-11

and 1-792-224-11) are necessary when repair this unit.

SECTION 1

SERVICE NOTE

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK 0OR DOTTED LINEWITH

MARK 0ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS

LIST ARE CRITICALTO SAFE OPERATION.

REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE

PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN

SUPPLEMENTS PUBLISHED BY SONY.

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.

Jig (20 core)

(1-792-164-11)

Jig (19 core)(1-792-165-11)

ASP board

(CN702)

Main board

TC RF board

(CN691)

CN804

CN305

CN302

Jig (9 core)

(1-792-224-11

)

Jig (6 pin)(1-792-223-11)

CAUTION

The use of optical instruments with this product

will increase eye hazard.

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–4 –

SECTION 2

GENERAL

LOCATION AND FUNCTION OF CONTROLS

MAIN UNIT

2

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1

3

1VOLUME +, –buttons

2CD tray

3Timer buttons

STANDBY

SLEEP

CLOCK

TIMER

DISPLAY

4Display window

5POWER button

6DIMMER button

72(Headphones) Jack

8DIR MODE button

9COUNTER RESET button

!º TAPE operation buttons

r/P(rec/pause)

CD DUBBING

0, )(FF, REW)

ª, ·(play)

π(stop)

!¡ PLAY MODE, MONO/ST ISS button

!™ ENTER/MEM button

!£ =(–) , +(+) TUNE TIME SET button

!¢ LINE IN button

!∞SUMER TIME button

!§ MEGA BASS button

!¶ SOUND button

!• 6CD OPEN/CLOSE button

!ª RADIO operation buttons

PRESET +

BAND

PRESET–

@º CD operation buttons

ﬂ(play/pause)

π(stop)

@¡ SNOOZE button

@™ Remote sensor

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–5 –

Remote commander

1DISPLAY button

2SLEEP button

3POWER button

4Number buttons

5MEGA BASS button

6VOLUME +, –buttons

7SOUND button

8CD operation buttons

=, +(AMS, search)

((play)

P(pause)

p(stop)

9TAPE operation buttons

p(stop)

“, ”(play)

r/P(rec/pause)

0, )(FF, REW)

!º RADIO operation buttons

TUNE +

TUNE –

BAND

!¡ MODE button

HOOKING UPTHE SYSTEM

DISPLAY POWER

CD/RADIO

MODE

RADIO MEGA/BASS VOL

TAPE

SOUND

TUNE

BAND

SLEEP

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!¡

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SECTION 3

DISASSEMBLY

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

3-1. CASE (BOTTOM),“COVER ASSY,TOP”

rThe equipment can be removed using the following procedure.

Case(bottom)

Cover ASSY, top

Main unit

CD ASSY Main board, Jack board

Tray ASP board

Motor board, Loading motor (M651) Optical pick-up block

Belt

Mechanism deck TC RF board, Head relay board, Capstan/reel motor (M160)

Control board VOL board

Display board

Cabinet, wood

Speaker unit

(R-CH)

Speaker (R-CH) (SP101) Power board

Cabinet (R) bottom Speaker board

AMP board, AMP IC board

DSP board, CPU board

5Wire, parallel (19 core)

6Wire, parallel (20 core)

(ASP board : CN702)

1Screws (+BVTT 3x10)

4Screws (+KPT 3x10)

37

Case (bottom)

Sub cover

2Claws

Cover ASSY, top

< MAIN UNIT >

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– 7 –

3-3. MAIN BOARD, JACK BOARD

3-2. CD ASSY

1Screws (+BVTT 3x10)

2

Case (bottom)

CD ASSY

2Screws (+BVTT 2.6x8)

5

3

Case (bottom)

Jack board

Main board

4Screw (+BVTT 2.6x8)

2Screws (+BVTT 2.6x8)

1Screws (+BVTT 3x10

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– 8 –

3-4.TRAY

3-5. ASP BOARD

3Projection

2

Tray

3Projection

1Turn the gear in a

direction as a figure

Chassis

3Wire, parallel (16 core)

2Remove solder

1Screw (+P 2x6)

4

Chassis

ASP board

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– 9 –

3-6. BELT

3-7. MOTOR BOARD, LOADING MOTOR (M651)

1Screws (+P 2.6x8)

2

Chassis

Chucking chassis

3Belt

4Loading motor (M651)

1Screws (+B 2x3)

2

Chassi

s

Claws

Motor board

3Remove solder

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– 10 –

3-8. OPTICAL PICK-UP BLOCK

3-9. MECHANISM DECK

2Screws (+PWH 2.6x10

)

4

3

Chassis

Optical pick-up block

Arm

1Screws (+PWH 2.6x10)

1Screws (+BVTT 3x10)

3

2

Cover, deck

Cover ASSY, top

Mechanism deck

1Screws (+BVTT 3x10

)

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– 11 –

3-10.TC RF BOARD, HEAD RELAY BOARD, CAPSTAN/REEL MOTOR (M160)

3-11. CONTROL BOARD

6Belt FR

Belt BR Belt FR

7Belt BR

1Screws

4Screw

9

3

5

Capstan/reel motor (M160)

Head relay board

TC RF board

8Screws

2Remove solder

1Screws (+BVTT 2.6x8)

4

2

Control board

DSP board

CPU board

Cover ASSY, top

3Screws (+BVTT 2.6x8)

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– 12 –

3-12. DISPLAY BOARD

3-13. DSP BOARD, CPU BOARD

3Wire, parallel (19 core)

1Screws (+BVTT 2.6x8)

4

2Wire, parallel (18 core)

Holder, Display PC board

DSP board

Display board

CPU boar

d

7Screws (+BVTT 2.6x8

)

1Screws (+BVTT 2.6x8)

2Support

3

8

5Wire, parallel (18 core)

4Wire, parallel (14 core)

6Wire, parallel (19 core)

DSP board

CPU board

Holder, Display PC board

Display board

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– 13 –

3-14.VOL BOARD

3-15.“CABINET,WOOD”,“CABINET (R) BOTTOM”

3Screws (+BVTT 2.6x8)

2

4

1Claws

Panel ASSY, front

Case (top)

VOL board

1Claws

1Claw

s

< SPEAKER UNIT (R-CH) >

2Screws (+P 4x16

)

3

Cabinet, Wood

1Screws (+P 4x16)

Cabinet (R) bottom

Sponge, back board

Note : Change a “Sponge, back board”

(3-042-179-01) for a new article

when remove the cabinet (R) bottom.

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– 14 –

3-16. SPEAKER (R-CH) (SP101)

3-17. POWER BOARD

3

1

Cabinet, Woo

d

2Screws (+BVTT 4x10)

4Screws

Stand, Grill

Speaker (SP101)

Speaker grill ASSY

Panel (R) ASSY, Sub

2

Cabinet, Woo

d

1Screws (+P 4x10)

Power board Bracket, Transfomer

Bracket, Transfomer

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– 15 –

3-18. AMP BOARD, AMP IC BOARD

3-19. SPEAKER BOARD

4

2

AMP board

3Screws (3x10)

1Screws (+BVTT 3x12)

Cabinet (R) botto

m

AMP IC board

5

3

2Screws

(+BVTT 3x8)

1Screws

(+BVTT 3x10)

4Screws

(+BVTT 3x8)

Stopper, wire

Cabinet (R) bottom

Stopper, cord

Airtight clipper Bracket

Cord, AC

Cord with connector

Speaker board

6Screws

(+BVTT 3x8)

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– 16 –

SECTION 4

ADJUSTMENTS

4-1. MECHANICAL ADJUSTMENTS

TAPE RECORDER SECTION

PRECAUTION

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

swab :record/playback/erase head pinch roller

rubber belts capstan

2. Demagnetize the record/playback/erasehead with ahead demag-

netizer.

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 sup-

ply voltage unless otherwise noted.

Torque Measurement

Torque Torque Meter Meter Reading

Forward CQ-102C 36 to 61 g • cm

(0.5 to 0.84 oz • inch)

Forward CQ-102C 2 to 6 g • cm

Back Tension (0.028 to 0.083 oz • inch)

Reverse CQ-102RC 36 to 61 g • cm

(0.5 to 0.84 oz • inch)

Reverse CQ-102RC 2 to 6 g • cm

Back Tension (0.028 to 0.083 oz • inch)

FF/REW CQ-201B 61 to 143 g • cm

(0.85 to 1.98 oz • inch)

TapeTension Measurement

Mode Tension Meter Meter Reading

FWD CQ-403A more than 100g

(more than 3.53 oz)

REV CQ-403A more than 100g

(more than 3.53 oz)

4-2. ELECTRICAL ADJUSTMENTS

TAPE RECORDER SECTION 0dB = 0.775V

1. The adjustnemts should be performed in the order in the service

manual. (As a general rule playback circuit adjustment should

be completed beforeming recording circuit adjustment.)

2. The adjustments should be performed for bothe L-CH and R-

CH unless otherwise indicated.

Standard Intput Level

Input terminal LINE IN

source impedance 10kΩ

input signal level 0.5V (–3.8dB)

Standard Output Level

Output terminal LINE OUT

load impedance 47kΩ

output signal level 0.5V (–3.8dB)

TestTape

Type Signal Used for

P-4-A100 10kHz, –10dB Azimuth Adjustment

WS-48B 3kHz, 0dB Tape Speed Adjustment

Record/Playback/Erase Head Azimuth Adjustment

Procedure :

1. Mode : FWD playback

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 1dB.

3. Phase Check

Mode : FWD playback

4. Change the reverse playback mode and repeat the step 1 to 3.

5. After the adjustment, lock the adjustment screw with suitable

locking compound.

Adjustment Location : – record/playback/erase head –

set

LINE OUT (JK301

)

47K Ω

level meter

test tape

P-4-A100

(10kHz, –10dB)

L-CH

peak R-CH

peak

L-CH

peak

R-CH

peak

Screw

position

output

level within

1 dB within

1 dB

screw positio

n

VH

in phase 90°

45°135°180°

good wrong

set

L-CH

R-CH

screen pattern

test tape

P-4-A100

(10kHz, –10dB) Osilloscope

LINE OUT (JK301)

47K Ω

adjustment screw

FWD side REV side

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– 17 –

Tape Speed Adjustment

Procedure :

– FWD Playback Mode –

1. Set to FWD playback mode.

2. Adjust RV160 so that the frequency counter reading becomes

3,000Hz.

Standard value : 2,970 to 3,030Hz

3. Set to REV playback mode.

Confirm the frequency should be within the standard value.

4. Confirm the frequency difference between beginning and the

end of tape should be within 1.5% (45Hz).

Adjustment Location : TC RF board

set

test tape

WS-48B

(3kHz, 0dB) frequency counter

LINE OUT (JK301)

47K Ω

TUNER SECTION

AM Section

BAND button : AM

Volume : MIN

FM Section

BAND button : FM

Volume : MIN

• Repeat the procedures in each adjustment several times, and the

frequency coverage and tracking adjustments should be finally

done by the trimmer capacitors.

AM IF ADJUSTMENT

Adjust for a maximum reading on level meter.

T2 450kHz

AM FREQUENCY COVERAGE ADJUSTMENT

Adjust part Frequency display reading on digital

voltmeter.

L5 530kHz Adjustment value :1.4V

Standard value : 1.2 – 1.6V

Confirmation 1,710kHz Standard value : 7.7 – 8.3V

AM TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter.

L4 620kHz

Confirmation 1,400kHz

set

AM RF signal

generator

loop antenna A loop antenna

B

60cm

30% amplitude modulation by 400Hz

signal

Output level : as low as possible

FM RF signal

generator

22.5kHz frequency deviation by

400Hz signal.

Output level : as low as possible

FM EXT.

ANT.

terminal

0.01 µF

set

47K Ω

+

–

LINE OUT (JK301)

level mete

r

0dB=1µV

TC RF board RV160 :Tape speed adjustment

Cabinet, front (Rear side)

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TEL 13942296513 QQ 376315150 892498299

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–18 –

FM IF ADJUSTMENT

Adjust for a maximum reading on level meter.

T4 10.7MHz

FM FREQUENCY COVERAGE CONFIRMATION

Adjust part Frequency display reading on digital

voltmeter

Confirmation 87.5MHz 1.2 – 1.6V

Confirmation 108MHz 7.7 – 8.3V

Connect andAdjustment Location :

TP1

+

–

AM frequency coverage

FM frequency coverage

Digital voltmeter

100K Ω

L4 : AM Tracking Adjustment

VT

GND

L5 : AM Frequency coverage Adjustment

T2 : AM IF Adjustment

T4 : FM IF Adjustment

SR1 : Auto Stop Level Adjustment

[MAIN BOARD] (Component side)

FM RF signal

generator

22.5kHz frequency deviation by

400Hz signal.

Output level : 30dBµ

FM EXT.

ANT.

terminal

0.01 µF

1. Set the frequency of FM SSG to 98MHz.

2. Press the TUNE button of the unit to start theAUTO TUNING.

3. Adjustment the SR1 to stop the auto tuning at 30dBµSSG out-

put

Auto Stop Level Adjustment

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– 19 – – 20 –

rCircuit Boards Location.

JACK boar

d

MAIN board

CPU board

VOL board

DISPLAY board

DSP board

HEAD RELAY boar

d

TC RF board

ASP board

MOTOR board

CONTROL board

AMP IC board

POWER board

SPEAKER board

AMP board

MAIN UNIT-1

MAIN UNIT-2

R-CH SPEAKER UNIT

Pin No. Pin name I/O Description

1 G02 O FL grid drive output.

2 G01 O FL grid drive output.

3 NC – Not used (OPEN).

4 CD SCOR I CD SCOR input.

5 T-COUNT I Tape rotation detect input.

6 P.DOWN IN (BACK UP) I Power ON detect input.

7 TAPE AMS IN I AMS signal input.

8 REMOTE IN I Remote control signal input.

9 FM STEREO IN I FM STEREO signal input.

10 RADIO SHFT CLK O Clock shift signal output.

11 LC72131 CE O Radio PLL IC chip enable output.

12 LC72131 CLK O Radio PLL IC clock output.

13 LC72131 DATA IN I Radio PLL IC data input.

14 LC72131 DATA OUT O Radio PLL IC data output.

15 CXD2589Q XRST O CD system reset output.

16 CXD2589Q XLAT O CD DSP IC command latch output.

17 CXD2589Q CLOCK O Clock output for CD DSP IC.

18 CXD2589Q DATA O CD DSP IC command data output.

19 CD OPEN SW IN I CD tray open switch input.

20 CD CLOSE SW IN I CD tray close switch input.

21 CXD2589Q SENS1 I CD SENS input.

22 BU1924F RCLK IN – Not used (OPEN).

23 BU1924F RADIO DATA IN – Not used (OPEN).

24 BU1924F QUARTY IN – Not used (OPEN).

25 CXD2589 SQCK O Clock output for CD SUB-Q.

26 CXD2589 SQSO I CD SUB-Q input.

27 CXD2589 SENS2 I CD SENS input.

28 AVREF I Reference voltage input (for A/D converter).

29-33 KEY1-5 I Key return signal input.

34 TAPE STATUS I Tape detection input.

35 TAPE MECHA MODE SW I FWD/REV detection input.

36 VER I Destination setting terminal (fixed at “H”).

37 AVSS – Ground.

38 RESET I System reset input.

39 EXTAL I O System clock output (8MHz).

40 XTAL1 I System clock input (8MHz).

41 VSS – Ground.

42 XTAL 32.768kHz I Real clock input (32.768kHz).

43 XTAL 32.768kHz O Real clock output (32.768kHz).

44 VDD – Power supply terminal.

45 VFDP – FL power supply terminal.

46 IN I I Initial setting input.

47 CD OPEN OUT O CD tray open signal output.

48 CD CLOSE OUT O CD tray close signal output.

49 PD3 – Not used (OPEN).

50 PD4 – Not used (OPEN).

SECTION 5

DIAGRAMS

5-1. EXPLANATION OF ICTERMINALS

IC801 CXP82832-022Q (SYSTEM CONTROL, FL DRIVE)

– 21 –

Pin No. Pin name I/O Description

51 SYS MUTE O Mute signal output.

52 TUNER MUTE O Tuner mute signal output.

53 CD MUTE O CD mute signal output.

54 LINE MUTE O Line mute signal output.

55 TAPE REC MUTE O Tape mute signal output.

56 TAPE REC O Tape REC output.

57 TAPE BIAS O Tape REC bias select output.

58 TAPE SOL O Plunger control output.

59 TAPE MECHA VCC OUT O Tape mechanism B+ ON/OFF output.

60 ISS 1 O ISS 1 ON/OFF output.

61 ISS 2 O ISS 2 ON/OFF output.

62 MEGABASS O Mega bass ON/OFF output.

63 POWER CONT OUT O Power ON/OFF output.

64 SUMMER LED – Not used. (OPEN)

65 SOUND LED O SOUND LED ON/OFF output.

66 DIMMER LED O DIMMER LED ON/OFF output.

67 BH3854 CK O Clock output for electrical volume IC.

68 BH3854 DATA O Data output for electrical volume IC.

69 BH3854 LACH O LACH output for electrical volume IC.

70 RESERVE – Not used (OPEN).

71-88 SEG 1-18 O FL segment drive output.

89 VDD – Power supply terminal.

90-100 G03-13 O FL grid drive output.

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– 22 – – 24 –– 23 –

PMC-DR50

5-2. BLOCK DIAGRAMS – CD,TUNER SECTION –

• Signal path.

F: FM

f: AM

J: CD

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http://www.xiaoyu163.com

Sony PMC-DR50 User manual

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