Casio PZ-3100, Руководство по обслуживанию

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A1
Is Q107
Base=2.8 V ?
(Play)
Yes
Is the waveform
IC101 pins 26 and 27 like
that shown in fig. 5 ?
No
Yes
*
Pickup is defective.
Repair Item 2-A1: Laser does not emit.
No
*
Check circuit around IC104 pins 1, 2 and 3.
*
Check circuit around IC103 pins 7, 8 and 9.
*
Check around IC102 pins 37, 36 and IC101
pin 44.
*
IC102, IC103 or IC104 is defective.
*
Check circuit around Q107.
*
Check flexible PCB connect.
*
Q107 is defective.
*
Pickup is defective.
Repair Item 2-A2: Object lens of pickup unit does not move up and down.
A2
Is the waveform
at IC102 pin 6 (FOD) like
that shown in fig. 6 ?
No
Yes
*
Check soldering of IC102 pin 6.
*
IC102 is defective.
*
Check circuit and IC101.
*
IC101 is defective.
Figure 5
1.8 V
Figure 6
1 V
7