Operation Panel Problems - Citizen CL-S400DT Technical Manual

4-2-5. Operation Panel Problems

Symptoms
LED does not light.
No key works.
Nothing appears on
the LCD.
Checks
1. Is the "SA FFC LED" firmly connected
between the "SA Main PCB" (J3) and
the "SA LCD PCB" (J301)?
2. Is the "SA FFC LED" inserted upside
down?
3. Failure in the "SA LCD PCB".
4. Failure in the control circuit.
1. Is the "SA FFC LED" firmly connected
between the "SA Main PCB" (J3) and
the "SA LCD PCB" (J301)?
2. Is the "SA FFC LED" inserted upside
down?
3. Failure in the "SA LCD PCB".
4. Failure in the control circuit.
1. Is the printer in Standby state (the
POWER LED is lit)?
2. Is the "SA FFC LED" firmly connected
between the "SA Main PCB" (J3) and
the "SA LCD PCB" (J301)?
3. Is the "SA FFC LED" inserted upside
down?
4. Is the FPC firmly connected between
the "SA LCD PCB" (J302) and the
LCD?
5. Failure in the "SA LCD PCB".
6. Failure in the control circuit.
1. Connect it firmly.
2. Insert it in the correct direction.
3. Replace the "SA LCD PCB".
4. Replace the "SA Main PCB".
1. Connect it firmly.
2. Insert it in the correct direction.
3. Replace the "SA LCD PCB".
4. Replace the "SA Main PCB".
1. Press any key.
2. Connect it firmly.
3. Insert it in the correct direction.
4. Connect it firmly.
5. Replace the "SA LCD PCB".
6. Replace the "SA Main PCB".
4-11
Chapter 4 Troubleshooting
4-2. Troubleshooting
Remedies
CL-S400DT