CBM1000 Service Manual
4. TROUBLESHOOTING
4.1 Troubleshooting Procedure
When a trouble occurs, confirm its phenomenon, locate a defective part in accordance with 4.2 Troubleshooting Guide, and troubleshoot as described below.
lPhenomenon: 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.
Lists as many possible causes as possible. Guess a trouble cause out of them and take its check method to specify the trouble cause.
lCheck Method: Describes a check method to specify a trouble cause.
l Remedy: Troubleshoot by taking a remedy described in this column.
By troubleshooting in accordance with the
4.2 Troubleshooting Guide
lPower Supply Failure
Phenomenon | Cause | Check Method | Remedy | |||||||
No power |
| The AC adapter is not |
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| Connect | the specified | |
(POWER lamp not | connected. |
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| AC adapter. | |||
illuminated) | The fuse is gone. | Check whether any un- | Use the | specified AC | ||||||
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| specified | power |
| has | adapter. |
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| been used so far. |
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| Check | whether |
| the | Use the specified fuse. | ||
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| specified fuse is used. |
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The | fuse | immedi- | The control PCB assy is |
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| Replace the control PCB | |
ately | goes | again | defective. |
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| assy. |
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after replacing with | The circuit drive power | With a | DC voltmeter, | Replace the control PCB | ||||||
new one. |
| is abnormal. | measure | the | circuit | assy. |
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| drive voltage. |
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TIf the fuse is gone with the specified AC voltage supplied to the AC adapter, it is likely that the thermal head unit or control PCB assy is defective. Replace either defective one. Incidentally, check the wiring of the drawer and interface cable.
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