Sony PMC-DR50L / PMC-DR70L Service Manual ▷ View online
– 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 and 1-792-165-11) are neces-
sary when repair this unit.
sary when repair this unit.
SECTION 1
SERVICE NOTE
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
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)
Main board
(CN804)
ASP board
(CN702)
This Compact Disc player is classified as a
CLASS 1 LASER product.
The CLASS 1 LASER PRODUCT label is
located at the bottom of the player.
CLASS 1 LASER product.
The CLASS 1 LASER PRODUCT label is
located at the bottom of the player.
Information
For customers in Europe
For customers in Europe
– 4 –
SECTION 2
GENERAL
LOCATION AND FUNCTION OF CONTROLS
MAIN UNIT
2
4
5
!¡
!º
@™
@¡
@º
!™
!£
!∞
!¢
!§
!¶
!•
!¶
!•
!ª
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 OPERATE button
6 RDS button
7 2 (Headphones) Jack
8 DIR MODE button
9 COUNTER RESET button
!º TAPE operation buttons
5 OPERATE button
6 RDS button
7 2 (Headphones) Jack
8 DIR MODE button
9 COUNTER RESET button
!º TAPE operation buttons
r/P (rec/pause)
DUBBING
DUBBING
0, ) (FF, REW)
ª, · (play)
ª, · (play)
π
(stop)
!¡ PLAY MODE, MONO/ST ISS button
!™ ENTER/MEM, PGM SET button
!£ =(–) , +(+) TUNE TIME SET button
!¢ LINE IN button
!
!™ ENTER/MEM, PGM SET 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
– 5 –
Remote commander
1 DISPLAY button
2 TA SEARCH button
3 OPERATE button
4 Number buttons
5 MEGA BASS button
6 VOLUME +, – buttons
7 SOUND button
8 CD operation buttons
2 TA SEARCH button
3 OPERATE 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)
( (play)
P (pause)
p (stop)
9 TAPE operation buttons
p (stop)
“, ” (play)
r/P (rec/pause)
0, ) (FF, REW)
“, ” (play)
r/P (rec/pause)
0, ) (FF, REW)
!º RADIO operation buttons
TUNE +
TUNE –
BAND
!¡ MODE button
HOOKING UP THE SYSTEM
(PMC-DR50L)
(PMC-DR70L)
DISPLAY
OPERATE
CD/RADIO
MODE
RADIO
MEGA/BASS
VOL
TAPE
SOUND
TUNE
BAND
TA
SEARCH
1
2
3
4
5
6
7
8
9
!º
!¡
– 6 –
SECTION 3
DISASSEMBLY
Note :
Follow the disassembly procedure in the numerical order given.
3-1. CASE (BOTTOM), “COVER ASSY, TOP”
r
The 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)
(R-CH)
Speaker (R-CH) (SP101)
Power board
Cabinet (R) bottom
Speaker board
AMP board, AMP IC board
Cabinet, wood
Speaker unit
(L-CH) (DR70L)
(L-CH) (DR70L)
Speaker (L-CH) (SP201)
Power transfomer board
Super woofer unit
(DR70L)
(DR70L)
Speaker (SP601), “Cabinet, front”
Cabinet (SWF) bottom, Connector board
LED board, volume board
Cabinet (L) bottom
SP main board, SP AMP IC board
AC outlet board, SP jack board
DSP board, CPU board
5
Wire, parallel (19 core)
6
Wire, parallel (20 core)
(ASP board : CN702)
1
Screws (+BVTT 3x10)
1
Screws (+BVTT 3x10)
4
Screws (+KPT 3x10)
3
7
Case (bottom)
Sub cover
2
Claws
2
Claws
2
Claws
Cover ASSY, top
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