Casio PZ-3100 Service Manual page 8

Repair Item 2-A
E = more than 0.9 V
Figure 2
>1.5
Figure 3
Figure 4
A
Does the LASER emit ?
Yes
Does the lens moves
up and down ?
Yes
Load a disc and close the CD door.
Then check the following.
Is the waveform
at testpoint IRF like that
shown in fig. 2 ?
Yes
Is the waveform
at IC102 pin 1 (FEO) like that
shown in fig. 3 ?
Yes
Is the waveform
at IC102 pin 45 (TEO) like that
shown in fig. 4 ?
Yes
IC102 is defective.
Pickup unit is defective.
! Note: Connect GND to door switch by removing the
top cabinet. Than open the top cover and check the
radiation power with an optical power meter. If an
optical power meter is not available, watch the
radiation through the lens of the pickup unit at a
minimum distance of 30 cm from the pickup unit.
!
No
!
No
Check flexible PCB connect.
Check soldering for IC101, IC102 and
No
IC103.
IC101, IC102 or IC103 is defective.
Pickup is defective.
Check circuit between IC102 pins1 and
No
2.
IC102 is defective.
Check flexible PCB connect.
No
IC102 is defective.
Check circuit around TE line.
6
A1
A2