Casio TK-7500 Manual de solución de problemas - Página 4
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2-2. Repair the Main P.C.Board 1
To repair the No display machine, perform the following repair procedure.
Check around the
power supply.
OK
Check osillation of
the pulse signal
OK
Check the data bus
OK
Note 1 : Each repair procedure refers to the each repair section.
Note 2 : Refer the service manual section 5 for open the upper case procedure.
START
NG
NG
correct.
line.
NG
END
- 4 -
Trouble shooting ECR V1.01
2-2-1. Repair around the
power supply.
2-2-2. Repair procedure 1
2-2-3. Repair procedure 2