Casio TK-7500 Handleiding voor probleemoplossing - Pagina 5
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2-2-1. Repair around the power supply
1) Check AC input voltage by a multimeter tester.
2) Check the voltage from each output pins of connector CN1 from the power supply PCB.
CN1 Pin No.1 — VC1(DC32.3V)
CN1 Pin No.2 — VC2(DC24V)
CN1 Pin No.3 — VLED(DC5.85V)
CN1 Pin No.4 — GND
CN1 Pin No.1
DC 32.3V
Note: Use the following GND point on the Main PCB for the oscilloscope.
:For the Display power
:For the Printer power
:For the Logic circuit power
:Signal GND
CN1 Pin No.3
CN1 Pin No.2
DC 5.85V
DC 24V
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Trouble shooting ECR V1.01
CN1 Pin No.4
GND 0V
Use the GND point for the
Oscilloscope.
Connector
CN1