DFX-8500
Table
Symptom | Cause | Checkpoint | Solution |
The carriage | IC1 on the C204 | Check the signals for the carriage | Replace IC1. |
operates | MAIN board is | motor phases at pins 204 (CRA), 205 |
|
abnormally. | defective. | (CRB), 206 (CRC), and 5 (CRD) of IC1 |
|
| Q16, Q17, Q18, or | Check the signals for the carriage | Replace Q16, Q17, |
| Q19 on the C204 | motor phases at collectors Q16 (CRA), | Q18, or Q19. |
| MAIN board is | Q17 (CRB), Q18 (CRC), and Q19 |
|
| defective. | (CRD). |
|
| IC1 is doesn’t work. | Check the voltage level between Anode | Replace ZD2, Q34, |
|
| and Kathode of ZD2 is APPROX. 6.2 V. | or Q35. |
| IC1 on the C204 DRV | Check the signals for the carriage | Replace IC1. |
| board is defective. | motor phases at pins 14 (IN_A) and 10 |
|
|
| (OUT1) of IC1.. |
|
| . | Measure the voltage level at pins 10 | Replace IC1. |
|
| (OUT1) and 5 (GP) of IC1 when the |
|
|
| carriage is operating. (The normal |
|
|
| voltage level is approximately 37 |
|
|
| VDC.), |
|
| IC3 on the C204 DRV | Observe the waveform at pin 1 of IC3. | Replace IC3. |
| board is defective. |
|
|
Rev. B |
