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| TROUBLESHOOTING | |
| Table |
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| |
Symptom | Cause | Checkpoint |
| Solution |
The 5 VDC line is | IC204 is defective. | Check the voltage level at pin 10 (V1) |
| Replace IC204. |
defective. |
| and pin5 (GP). |
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| Observe the drive waveform at pin 8 |
| Replace IC204 or |
|
| (VO) and pin 5 (GP). |
| ZD211. |
37 VDC line | IC102 is defective. (If | When the input voltage of the minus |
| Replace IC203. |
(VP1/VP2) is | this IC is defective, it | port (pin 6 for VP1 and pin2 for VP2) is |
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abnormal. | cannot monitor the 37 | less than 1.3 VDC, the comparator |
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| VDC lines, and | outputs a HIGH signal. |
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| printing operation |
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| becomes abnormal.), |
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37 VDC line (VP3) | IC203 is defective. (If | When the input voltage of the plus port |
| Replace IC203. |
is abnormal. | this IC is defective, it | is bigger than 1.3 VDC, the comparator |
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| cannot monitor the 37 | outputs a HIGH signal. |
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| VDC lines, and motor |
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| operations become |
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| abnormal.), |
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Rev. B | ||
