Servicing Notes - Sony HCD-S550 Service Manual

NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
The laser diode in the optical pick-up block may suffer electro-
static break-down because of the potential difference generated
by the charged electrostatic load, etc. on clothing and the human
body.
During repair, pay attention to electrostatic break-down 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 emis-
sion, observe from more than 30 cm away from the objective lens.
JIG ON REPAIRING
When repairing this set, etc., connect the extension cable as the
figure shown below.
RELEASING THE DISC SLOT LOCK
The disc slot lock function for the antitheft of an demonstration
disc in the store is equipped.
Releasing Procedure:
1. Press two buttons of A and
onds.
2. The message "UNLOCKED" is displayed and the slot is un-
locked.
Note: When "LOCKED" is displayed, the slot lock is not released by
turning power on/off with the
SECTION 1

SERVICING NOTES

x simultaneously for three sec-
[POWER]
button.
extension cable (with relay board)
(RELAY board-DVD board)
(Part No. J-2501-091-A)
CHECKING OF OPERATIONS WITH REMOTE COM-
MANDERS OF DIFFERENT MODELS
Some of the signal of remote commander vary between genera-
tion of player.
Between DAV-S400/S500/S800/C450/C700/C900 and DAV-S550/
S880/C770/C900, remote commander signal codes of "FUNC-
TION", "BAND", "ST/MONO" and "MEMORY" are different.
Take notice of the above when you check the operation with re-
mote commanders of different models.
NOTE OF REPLACING THE DVD BOARD
When replacing the DVD board, since the adjustment value is not
set up correctly, "Drive Auto Adjustment" can't be performed.
In this case, initialize Memory in the following procedures.
Procedure:
1. Set the test mode. (See page 20)
[2]
2. Press the key of the remote commander, and set the "DRIVE
MANUAL OPERATION". (See page 22)
[6]
3. Press the key of the remote commander, and set the "2-6,
Memory Check". (See page 24)
[CLEAR]
4. Press the key of the remote commander, and initial-
ize Memory.
extension cable
(RF board-DVD board)
(Part No. J-2501-217-A)
extension cable
(DVD board-AMP board)
(Part No. J-8000-024-A)
extension cable
(DVD board-AMP board)
(Part No. J-2501-198-A)
HCD-S550/S880
Ver 1.6
5