Servicing Notes - Sony SS-CM90 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.
MODEL IDENTIFICATION
– Back Panel –
Part No.
Model Name
AEP and UK models
US and Canadian models
Singapore model
Australian model
Chinese model
RELEASING THE DISC TRAY LOCK
The disc tray lock function for the antitheft of an demonstration
disc in the store is equipped.
Releasing Procedure :
While pressing the key, press the
x
"UNLOCKED" is displayed and the tray is unlocked.
Note: When "LOCKED" is displayed, the tray lock is not released by
turning power on/off with the
SECTION 1

SERVICING NOTES

Part No.
4-239-822-0
[]
4-239-823-0 []
4-239-824-0 []
4-240-899-0
[]
4-242-690-0 []
Connect jig (extension cable J-2501-167-A)
to the main board (CN301) and TC board (CN301).
[ DVD]
key. The message
Z
/ button.
I 1
SERVICE POSITION
In checking the control board, prepare jig (extension cable J-2501-
219-B: 1.00 mm Pitch, 10 cores, Length 300 mm).
Connect jig (extension cable J-2501-219-B)
to the control board (CN507) and DVD board (CN101).
DVD board (CN008)
In checking the tape deck section, prepare jig (extension cable J-
2501-167-A: 1.25 mm Pitch, 17 cores, Length 300 mm).
TC board (CN301)
HCD-M90
Ver 1.3
control board (CN008)
main board (CN301)
5