Citizen CT-S4000

CT-S4000 Service Manual
14
2.2 Troubleshooting Procedure
When a trouble occurs, confirm its phenomenon, locate a defective part in accordance with “2.2
Troubleshooting Guide”, and troubleshoot as described below.
Phenomenon
Find a trouble phenomenon in this column. If there are multiple phenomena, take all the
corresponding items into consideration to locate hidden defective parts.
Cause
Lists as many possible causes as possible. Guess a trouble cause out of them and take
its check method to specify the trouble cause.
Check
Method
Describes a check method to specify a trouble cause.
Remedy
Troubleshoot by taking a remedy described in this column.
By troubleshooting in accordance with the above-mentioned procedure, you can troubleshoot efficiently
with fewer misjudgments.
2.3 Troubleshooting Guide
• Power Supply Failure
Phenomenon Cause Check Method Remedy
The AC cable is not
connected.
— Connect AC cable.
No power
(POWER lamp not
illuminated)
The fuse is gone.
Check whether the
specified fuse is used.
Use the specified fuse.
Faulty control PCB assy —
Replace the control PCB
assy.
The fuse immediately
goes again after
replacing with a new one.
The circuit drive power is
abnormal.
Use instruments such as
tester to measure circuit
driving voltage.
Replace the control PCB
assy.
* If the fuse is gone with the specified AC adapter used, it is likely that the thermal head unit or control
PCB assy is defective. Replace either defective one. Check wiring for drawer cable and interface
cable.