Troubleshooting; Problems In Powering Up The Printer - Citizen CL-E720DT Technical Manual

4-2. Troubleshooting

The following tables show possible remedies for various symptoms that might occur. Symptoms
are given in the left column, and the corresponding remedies in the right column.
Notes: 1. When parts are replaced, refer to Chapter 3 "Disassembly and Maintenance".
2. For the location of each connector, refer to

4-2-1. Problems in Powering Up the Printer

Symptoms
No power to the
printer
Checks
1. Check voltage on the input power line.
Acceptable supply voltage:
100 to 240V AC
2. Is the power cord loosely connected?
3. Is the "SA Power Cable" firmly
connected between the "Unit Power
Supply" and the "SA Main PCB" (J13)?
4. Is the "FFC Opepane" connected
between the "SA Main PCB" (J3) and
the "SA Opepane PCB" firmly?
If it is not connect or is inserted upside
down, no LED lights even if you turned
ON the power. Also, nothing is
displayed on the LCD.
5. Failure in the power supply circuit.
"4-2-6 Connector
1. Supply correct voltage.
2. Connect it firmly.
3. Connect it firmly.
4. Connect it firmly.
5. Replace the "Unit Power Supply".
4-5
Chapter 4 Troubleshooting
4-2. Troubleshooting
Location".
Remedies
CL-E720DT