Casio ZD-3 Service Manual page 21

Repair Item 2-A1: The laser does not emit.
* Check FFC connector (CN701).
* Pickup is defective.
Repair Item 2-A2: The lens does not move up and down.
A2
Is waveform at
pins 13 and 16 of CN701 like that
shown in figuer 8 ?
Yes
* Check FFC connector
from pickup.
* Pickup is defective.
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A1
Is emitta of Q701
3.3V ?
Yes
Is pin 34 of IC701
more than 2.0V at
playing ?
Yes
No
Is waveforn at
pin 5 (FEO) of IC701 like
that shown in figuer 9 ?
* Check circuit around
IC701.
* IC701 is defective.
19
No
* Check soldering Q701.
* Check circuit around pin 34 of
No
IC701.
* Check digital signal pins 18, 19
and 20 of IC701.
VC 3.6V
Figure 20
No
Yes
VC 1.6V
Figure 21
* Check circuit around
and soldering pin 16 of
IC701.
* IC701 is defective.
* IC702 is defective.