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Casio PZ-700 Service Manual page 7

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Repair Item 1: At power on, "00" is not displayed.
Repair Item 2: Total track number is not displayed.
1
Is the switch
"HOLD" set "OFF" ?
Yes
Is the voltage
3.25 0.1V at terminal
TP1 ?
Yes
Does clock
pulse appear at pin 15 of
IC801 ?
Yes
Check IC801.
Check the circuit around IC801.
Check LCD801.
2
Does the LASER emit ?
Yes
Does the lens move
up and down ?
Yes
Check IC501 and IC601.
Check the circuit around IC501 and
IC601.
No
Set the "HOLD" switch "OFF".
Check IC502.
No
Check the circuit around IC502.
Check the Q401, Q402, T401 circuit.
Check IC601.
No
Check the X601.
Check the circuit around IC601.
Check >3V appears at pin 3 of IC501.
No
Check IC501.
Check Q501.
No
Check IC502.
Check the circuit around IC502.
5

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