iDP3550/3551 Service Manual
11 CITIZEN
4. TROUBLESHOOTING
4.1 Troubleshooting Procedure
When a trouble occurs, confirm its phenomenon, locate a defective part in accordance with 4.2 Troubleshoot-
ing 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. This allows you to specify
a hidden defective part.
• 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.
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