Muratec MFX-1700 Specifications download pdf (Page 146)

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4.16 LCD Failure

Symptom: No display in the LCD.

Suggested corrective action:

1. Verify that the power cord is correctly connected and the power switch is ON.

2. Check for a blown fuse or open circuit on the unit’s internal power supply.

3. Check the DC output voltages from the power supply unit to connector P10 on the main control PCB. If

any of the following voltages are incorrect, replace the power supply.

• Pin 1 : -12 VDC

• Pin 2 : +12 VDC

• Pin 3, 4, 5 : +5 VDC

• Pin 6 : HC1

• Pin 7, 8, 9 : +24 VDC

• Pin 10, 11, 12, 13 : GND

• Pin 14 : HC2

4. Check the following connectors:

• LCD assembly to the Panel A PCB (P1903)

• Panel A PCB (P190A) to the Harness to the main control PCB (P19A)

• Panel A PCB (P190B) to the Harness to the main control PCB (P19B)

5. Replace the associated PCBs and connector harness.

4.17 General Power Failure

Symptom: Unit will not power up.

Suggested corrective action:

1. Verify that the power cord is correctly connected and the power switch is ON.

2. Verify that the electrical outlet is on.

3. Check for a blown fuse or open circuit on the unit’s internal power supply.