Sony PMCDR-50 Service manual
PMC-DR50
SERVICE MANUAL
Ver 1.0 2000.03
TAPE Model Name Using Similar Mechanism NEW
Section T ape Transport Mechanism T ype MF-PMCDR50
CD
Section
US Model
Model Name Using Similar Mechanism NEW
MD Mechanism Type KSM-213CCP
Optical Pick-up Type KSS-213C
SPECIFICATIONS
– Continued on page 2 –
PERSONAL COMPONENT SYSTEM
TABLE OF CONTENTS
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
– 2 –
SECTION 1
)
SERVICE NOTE
CAUTION
The use of optical instruments with this product
will increase eye hazard.
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.
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.
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 pickup block. Therefore, when checking the laser diode emission, observe 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.
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.
Jig (20 core)
(1-792-164-11)
CN302
Jig (19 core)(1-792-165-11)
Jig (6 pin)(1-792-223-11)
TC RF board
(CN691)
Jig (9 core)
(1-792-224-11
ASP board
(CN702)
Main board
CN305
CN804
– 3 –
LOCATION AND FUNCTION OF CONTROLS
MAIN UNIT
9
8
7
6
5
4
SECTION 2
GENERAL
qaq;
qs
qd
qf
qg
qh
qj
qk
ql
3
2
1
ws wa w;
1 VOLUME +, – 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
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
!• 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
– 4 –
Remote commander
1 2 3
!¡
!º
DISPLAY
MODE
RADIO
TUNE
BAND
SLEEP
CD/RADIO
MEGA/BASS
SOUND
TAPE
POWER
VOL
4
5
6
7
8
9
1 DISPLAY button
2 SLEEP button
3 POWER button
4 Number buttons
5 MEGA BASS button
6 VOLUME +, – buttons
7 SOUND button
8 CD operation buttons
=, +(AMS, search)
( (play)
P (pause)
p (stop)
9 TAPE operation buttons
p (stop)
“, ” (play)
r/P (rec/pause)
0, ) (FF, REW)
!º RADIO operation buttons
TUNE +
TUNE –
BAND
!¡ MODE button
HOOKING UP THE SYSTEM
– 5 –
DISASSEMBLY
r
The equipment can be removed using the following procedure.
SECTION 3
Case(bottom)
CD ASSY Main board, Jack board
Tray ASP board
Main unit
Motor board, Loading motor (M651) Optical pick-up block
Cover ASSY, top
Mechanism deck TC RF board, Head relay board, Capstan/reel motor (M160)
Control board
Display board
VOL board
Speaker unit
(R-CH)
Cabinet, wood
Cabinet (R) bottom
Speaker (R-CH) (SP101) Power board
AMP board, AMP IC board
Note : Follow the disassembly procedure in the numerical order given.
< MAIN UNIT >
3-1. CASE (BOTTOM), “COVER ASSY, TOP”
2 Claws
Belt
DSP board, CPU board
Speaker board
1 Screws (+BVTT 3x10)
Sub cover
6 Wire, parallel (20 core)
(ASP board : CN702)
3
1 Screws (+BVTT 3x10)
7
2 Claws
4 Screws (+KPT 3x10)
Cover ASSY, top
2 Claws
5 Wire, parallel (19 core)
Case (bottom)
– 6 –
3-2. CD ASSY
)
CD ASSY
Case (bottom)
2
3-3. MAIN BOARD, JACK BOARD
4 Screw (+BVTT 2.6x8)
2 Screws (+BVTT 2.6x8)
Main board
1 Screws (+BVTT 3x10)
Jack board
2 Screws (+BVTT 2.6x8)
5
1 Screws (+BVTT 3x10
3
– 7 –
Case (bottom)
3-4. TRA Y
3 Projection
1 Turn the gear in a
direction as a figure
2
Chassis
3 Projection
Tray
3-5. ASP BOARD
1 Screw (+P 2x6)
ASP board
2 Remove solder
4
3 Wire, parallel (16 core)
Chassis
– 8 –
3-6. BELT
s
1 Screws (+P 2.6x8)
Chucking chassis
3 Belt
Chassis
2
3-7. MOTOR BOARD, LOADING MOTOR (M651)
3 Remove solder
2
Claws
Motor board
4 Loading motor (M651)
Chassi
– 9 –
1 Screws (+B 2x3)
3-8. OPTICAL PICK-UP BLOCK
)
)
1 Screws (+PWH 2.6x10)
3
Arm
2 Screws (+PWH 2.6x10
4
3
Optical pick-up block
Chassis
3-9. MECHANISM DECK
2
3
Cover ASSY, top
Mechanism deck
1 Screws (+BVTT 3x10
1 Screws (+BVTT 3x10)
– 10 –
Cover, deck
3-10. TC RF BOARD, HEAD RELAY BOARD, CAPSTAN/REEL MOTOR (M160)
6 Belt FR
Belt BR
Belt FR
7 Belt BR
1 Screws
4 Screw
9
3
5
Capstan/reel motor (M160)
Head relay board
TC RF board
8 Screws
2 Remove solder
2 Remove solder
3-11. CONTROL BOARD
3 Screws (+BVTT 2.6x8)
Cover ASSY, top
4
2
Control board
3 Screws (+BVTT 2.6x8)
– 11 –
DSP board
CPU board
1 Screws (+BVTT 2.6x8)
3-12. DISPLAY BOARD
d
)
2 Wire, parallel (18 core)
DSP board
1 Screws (+BVTT 2.6x8)
3-13. DSP BOARD, CPU BOARD
4
CPU boar
Holder, Display PC board
3 Wire, parallel (19 core)
Display board
1 Screws (+BVTT 2.6x8)
DSP board
4 Wire, parallel (14 core)
5 Wire, parallel (18 core)
6 Wire, parallel (19 core)
8
– 12 –
3
7 Screws (+BVTT 2.6x8
Holder, Display PC board
Display board
2 Support
CPU board
3-14. V OL BOARD
s
)
Panel ASSY, front
1 Claws
1 Claw
2
1 Claws
< SPEAKER UNIT (R-CH) >
3-15. “CABINET , WOOD”, “CABINET (R) BOTTOM”
4
Case (top)
1 Claws
VOL board
3 Screws (+BVTT 2.6x8)
2 Screws (+P 4x16
Cabinet, Wood
3
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.
1 Screws (+P 4x16)
– 13 –
3-16. SPEAKER (R-CH) (SP101)
d
d
Stand, Grill
2 Screws (+BVTT 4x10)
1
4 Screws
Speaker (SP101)
Panel (R) ASSY, Sub
3
Cabinet, Woo
Speaker grill ASSY
3-17. POWER BOARD
Bracket, Transfomer
Stand, Grill
2 Screws (+BVTT 4x10)
Power board
2
Bracket, Transfomer
Cabinet, Woo
– 14 –
1 Screws (+P 4x10)
3-18. AMP BOARD, AMP IC BOARD
m
5
3
2 Screws
(+BVTT 3x8)
1 Screws
(+BVTT 3x10)
4 Screws
(+BVTT 3x8)
Stopper, wire
Cabinet (R) bottom
Stopper, cord
Airtight clipper
Bracket
Cord, AC
Cord with connector
Speaker board
6 Screws
(+BVTT 3x8)
AMP board
3 Screws (3x10)
4
2
Cabinet (R) botto
1 Screws (+BVTT 3x12)
3-19. SPEAKER BOARD
AMP IC board
– 15 –
SECTION 4
)
n
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/erase head with a head demagnetizer.
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
Torque Torque Meter Meter Reading
Forward CQ-102C
Forward
Back Tension (0.028 to 0.083 oz • inch)
Reverse CQ-102RC
Reverse
Back Tension (0.028 to 0.083 oz • inch)
FF/REW CQ-201B
CQ-102C
CQ-102RC
T ape Tension Measurement
Mode Tension Meter Meter Reading
FWD CQ-403A
REV CQ-403A
36 to 61 g • cm
(0.5 to 0.84 oz • inch)
2 to 6 g • cm
36 to 61 g • cm
(0.5 to 0.84 oz • inch)
2 to 6 g • cm
61 to 143 g • cm
(0.85 to 1.98 oz • inch)
more than 100g
(more than 3.53 oz)
more than 100g
(more than 3.53 oz)
Record/Playback/Erase Head Azimuth Adjustment
Procedure :
1. Mode : FWD playback
test tape
P-4-A100
(10kHz, –10dB)
set
level meter
47K Ω
LINE OUT (JK301
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.
L-CH
peak
within
Screw
position
R-CH
peak
output
level
1 dB
L-CH
peak
R-CH
peak
within
1 dB
screw positio
3. Phase Check
Mode : FWD playback
test tape
P-4-A100
(10kHz, –10dB)
L-CH
set
47K Ω
Osilloscope
H
V
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 RCH 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)
Test T ape
Type Signal Used for
P-4-A100 10kHz, –10dB Azimuth Adjustment
WS-48B 3kHz, 0dB Tape Speed Adjustment
47K Ω
LINE OUT (JK301)
screen pattern
90°
135°
180°
wrong
in phase
R-CH
45°
good
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 –
FWD side REV side
adjustment screw
– 16 –
Tape Speed Adjustment
B
r
Procedure :
– FWD Playback Mode –
test tape
WS-48B
(3kHz, 0dB)
set
frequency counter
47K Ω
LINE OUT (JK301)
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
Cabinet, front (Rear side)
TUNER SECTION
0dB=1µV
AM Section
BAND button : AM
Volume : MIN
loop antenna A
AM RF signal
generator
30% amplitude modulation by 400Hz
signal
Output level : as low as possible
FM Section
BAND button : FM
Volume : MIN
FM RF signal
generator
60cm
loop antenna
set
TC RF board
RV160 : Tape speed adjustment
0.01 µF
22.5kHz frequency deviation by
400Hz signal.
Output level : as low as possible
level mete
47K Ω
set
LINE OUT (JK301)
FM EXT.
ANT.
terminal
+
–
• 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
L5 530kHz
Confirmation 1,710kHz Standard value : 7.7 – 8.3V
reading on digital
voltmeter.
Adjustment value :1.4V
Standard value : 1.2 – 1.6V
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L4 620kHz
Confirmation 1,400kHz
– 17 –
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