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Diagnosing 8920 & 8930 problems:
| Problem/customer complaint | Possible corrective action |
| 1. Doesn't see paper loaded/installed.
2. Printhead slams and grinds. (No home position) 3. Gets margin errors. |
1st: Clean and/or replace optical
sensor. 2nd: Replace upper/right printhead cable. |
| 4. Paper jamming under printhead. | 1st: Check printhead shield
for bends or rough edges. (Replace if necessary.) 2nd: Check for proper mounting of optical sensor. 3rd: Clean and/or replace optical sensor. 4th: Clean/replace lower rollers (8930 only). |
| 5. No carriage (printhead) movement. 6. No pins firing on printhead. (No dots on paper/all pins dead) |
Replace driver board. |
| 7. No paper advance. | 1st: Replace driver board. 2nd: 8930 only: check setup for tractor feed enabled. |
| 8. Printer shuts down (powers off) after 3-4 seconds. | 1st: Remove power supply from
printer and power up separately. Observe the green LED: ON - Replace driver board. OFF - Replace power supply |
| 9. Won't communicate with host or prints garbage. | 1st: Check all setup parameters
and interface cables. 2nd: Replace logic board. |
| 10. Some pins not firing. | 1st: Replace printhead. 2nd: Replace upper and/or lower printhead cable 3rd: Replace driver board. |
| 11. Touch pad inoperable. No display or partial display. |
1st: Replace control panel. |
| 12. No ribbon advance. | 1st: Replace ribbon tray assembly. |
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