Sony PMC-DR50 Service Manual ▷ View online
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
– 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
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
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
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
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
– 3 –
NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK
OR BASE UNIT
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.
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.
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
CHECK
1. Close the Tray for CD.
2. Press 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.
Optical Pick-up is broken.
Objective lens moves up and down once for the focus search.
ABOUT THE 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.
and 1-792-224-11) are necessary when repair this unit.
SECTION 1
SERVICE NOTE
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
PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN
SUPPLEMENTS PUBLISHED BY SONY.
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-
• 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)
(1-792-224-11)
Jig (6 pin)(1-792-223-11)
CAUTION
The use of optical instruments with this product
will increase eye hazard.
will increase eye hazard.
– 4 –
SECTION 2
GENERAL
LOCATION AND FUNCTION OF CONTROLS
MAIN UNIT
2
4
5
qa
q;
ws
wa
w;
qs
qd
qg
qf
qh
qj
qk
ql
6
7
8
9
1
3
1 VOLUME +, – buttons
2 CD tray
3 Timer buttons
2 CD tray
3 Timer buttons
STANDBY
SLEEP
CLOCK
TIMER
DISPLAY
4 Display window
5 POWER button
6 DIMMER button
7 2 (Headphones) Jack
8 DIR MODE button
9 COUNTER RESET button
!º TAPE operation buttons
5 POWER button
6 DIMMER button
7 2 (Headphones) Jack
8 DIR MODE button
9 COUNTER RESET button
!º TAPE operation buttons
r/P (rec/pause)
CD DUBBING
CD DUBBING
0, ) (FF, REW)
ª, · (play)
ª, · (play)
π
(stop)
!¡ PLAY MODE, MONO/ST ISS button
!™ ENTER/MEM button
!£ =(–) , +(+) TUNE TIME SET button
!¢ LINE IN button
!
!™ ENTER/MEM button
!£ =(–) , +(+) TUNE TIME SET button
!¢ LINE IN button
!
∞
SUMER TIME button
!§ MEGA BASS button
!¶ SOUND button
!• 6 CD OPEN/CLOSE button
!ª RADIO operation buttons
!¶ SOUND button
!• 6 CD OPEN/CLOSE button
!ª RADIO operation buttons
PRESET +
BAND
PRESET–
@º CD operation buttons
fl (play/pause)
π
(stop)
@¡ SNOOZE button
@™ Remote sensor
@™ Remote sensor
