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TABLE OF CONTENTS
Section
Page
I.
GENERAL
1 - 1 . P a r t s l d e n t i f i c a t i o n .
. . . . . . 3
2.
TEST MODES
2-1. Test Mode of Display Microcomputer (IC401) ....4
2-2. Test Mode of CD System Controller (1C202) .. . . ..4
3 .
. . . . . . . . . 5
4.
. . . . . . . 7
4 - 2 . B l o c k D i a g r a m . . . .
. . . . . . . 9
4 - 3 . P r i n t e d W i r i n g B o a r d s
. . . . . . . . . . 1 2
4 - 4 . S c h e m a t i c D i a g r a m
. . . . . . . 1 5
4 - 5 . S e m i c o n d u c t o r
L e a d L a y o u t s
. . . . . . . . . . . 2 2
5.
EXPLODED VIETYS
. . . . . . . . . . 2 3
5 - 2 . C D B l o c k ( C D M 1 3 B A - 5 8 D 3 )
. . . . . . . . . . . 2 4
5 - 3 . O p t i c a l P i c k - U p B l o c k ( B U - 5 B D 3 ) . . . . . . . . . . . . . . 2 5
6 .
. . . . . . . . 2 6
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 diference
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, observe from more than 30cm away from the
objective lens.
LASER DIODE AND FOCUS SERCH OPERATION CHECK
1. Make POWER switch on with no disc inserted and disc
table closed.
2. Confirm that the following operation is performed while
observing the objective lens.
oConfirm that laser beam is spread.
o Up and down motion of the objective lens. (3 times)
Title
-2-
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