Sony CDX-51 - Page 61

CDX-91/51RF
US Model
Canadian Model
AEP Model
UK Model
E Model
SONY.
SERVICE MANUAL
SUPPLEMENT-4
File this supplement with the service manual.
Subject: Optical Pick-up Block Modification
(ENG-96025)
Optical pick-up block was been changed from MG-153CD-131 to MG-154CD-131 in the
midst of production. At the same time, servo board was been changed.
1. NEW/FORMER DISCRIMINATION
* Optical Pick-up * Servo Board — Conductor Side —
Label stuck outside of the optical pick-up
Former : 1-659-707-00
New — : 1-662-974-11
Former : KSS-410A
New =: KSS-520A
2. SERVICING NOTES
NOTES ON PICK-UP FLEXIBLE BOARD
The pick-up flexible board in this set is secured to the optical pick-
up with an adhesive tape. Once the tape is removed, an adhering
force becomes weak, and it cannot be reused.
‘Therefore, if the optical pick-up is replaced, replace also the pick-
up flexible board with a new one.
NOTES ON CLEANING THE OBJECTIVE LENS
cotton swabs
objective lens
2-axis cover
optical pick-up
3. DISASSEMBLY
SERVO BOARD AND OPTICAL PICK-UP BLOCK
© two connectors
(CNP11, 12)
He
@ flexible flat cable (11 core)
(CNJ 13)
@ MD flexible board
(CNJ 12)
Apply CD lens cleaner B-4 (Part No.: J-2501-000-A) to cotton swabs
(narrow type) (Part No.: J-2501-023-A) to be lightly wet. Use a
force (about 5 g (0.18 0z)) to make the objective lens in contact
with the bottom lightly, and clean the lens by spirals as following
below.
Replace the cotton swab and repeat this cleaning two or three times.
surfase of objective lens
Notes:
Do not force to push the objective lens. Otherwise, the plate spring
supporting the objective lens will be bent, causing a deteriorated
RF waveform.
Never touch anything other than the objective lens. Otherwise, a
significant deterioration occurs in the RF waveform.
© two screws
(P2x 8) @ screw (45-2)
Se
© four screws (PTT2x 5) / Ve
© SERVO board
Be
@® insulating sheet
~~
“© bracket (OP)
~~@® sheet (OP CD)
foo
é
®
optical
pick-up
: block
OP flexible board
(CNJ11)