Citizen CLP-631 - Troubleshooting

4-2. Troubleshooting
4-5 CLP-621 & CLP-631
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. Connectors (CN . . .) given in the column of checks and remedies are connected with
the Main PCB Unit. For the location of each connector, refer to 4-2-7 "Connector
Location".
4-2-1. Problems in Powering Up the Printer
Symptoms Checks Remedies
No power to the
printer
1. Check voltage on the input power line.
Acceptable supply voltage:
120V (-10%+6%) for 120V version
220V-240V (-10%+6%) for 220V version
2. Is the fuse F1 on the Power Supply Unit
blown?
3. Is the Power Cable SA firmly connected
between the Power Supply Unit and the
Main PCB Unit (CN10)?
4. Is the Ope-pane Cable connected
between the Main PCB Unit (CN12)
and the Ope-Pane PCB SA firmly?
If it is not connect or is inserted upside
down, no LED lights even if you turned
ON the power.
5. Failure in the power supply circuit.
1. Supply correct voltage.
2. Replace with new fuse. If new fuse
is also blown when power is turned
on with the connector CN10
disconnected from the Main PCB
Unit, the Power Supply Unit is
faulty and must be replaced.
Notes:
- Do not replace the fuse with the
power switch turned on.
- The fuse is provided to prevent
fire, and damage to the Power
Supply Unit. When replacing it,
use the same rating and type.
3. Connect it firmly.
4. Connect it firmly.
5. Replace the Power Supply Unit.