Troubleshooting Procedure; Troubleshooting Guide - Citizen PMU-2200II Service Manual

3.2

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.
Find a trouble phenomenon in this column. If there are multiple phenomena, take all the
Phenomenon
corresponding items into consideration to locate hidden defective parts.
Lists as many possible causes as possible. Guess a trouble cause out of them and take
Cause
its check method to specify the trouble cause.
Check
Describes a check method to specify a trouble cause.
Method
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.
3.3

Troubleshooting Guide

• Power Supply Failure
Phenomenon
No power
(POWER lamp not
illuminated)
The fuse immediately
goes again after
replacing with a new one. The circuit drive power is
* 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.
Cause
The AC cable is not
connected.
The fuse is gone.
Faulty control PCB assy
abnormal.
PMU2200Ⅱ/2300ⅡSERIES Service Manual
Check Method
—
Check whether the
specified fuse is used.
—
Use instruments such as
tester to measure circuit
driving voltage.
-22-
Remedy
Connect AC cable.
Use the specified fuse.
Replace the control PCB
assy.
Replace the control PCB
assy.