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1Light or blurred images or images in inappropriate color tone on the whole printout area
(Figure 6.2- A )
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Is toner low? (Is the message "Toner Low" displayed?)
Yes | Supply toner. |
No | Is the specified paper used? |
No | Use the specified paper. |
Yes | Is the lens of the LED head dirty? |
Yes | Clean the LED head lens. |
No | Is each LED head assy connected properly to the junction board (Y71 PWB) and engine |
| board (K73 PWB)? |
No | Check the cable connection (between each LED head and the engine board) and connect |
| the cable between the LED head and the engine board properly. |
Yes | Is +3.8V supplied to the following POWER connector pins on the junction board(Y71 PWB)? |
| +3.8V: Pins 1, 2, 3, 4, 5, 6, 7 and 8 |
• Yes | Is +3.8V supplied to each LED head assy from the junction board (Y73 PWB)? |
| YPOW connector Pin 3: LED head assy yellow |
| MPOW connector Pin 3: LED head assy magenta |
| CPOW connector Pin 3: LED head assy cyan |
| BPOW connector Pin 3: LED head assy black |
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| No Replace the junction board (Y71 PWB). |
| ▼ | Check the cable connection, or replace the LED head assy. |
| • Yes | |
▼ | No | Check the cable connection, or replace the |
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| Yes | End |
▼ | No | Is +32V supplied to the POWER connector pins on the engine board (K73 PWB)? |
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| +32V: Pins 7, 8, 9 and 10 |
| No | Check cable connection, or replace the |
▼ | Yes | Is +32V supplied to the HVOLT connector Pin 5 on the engine board (K73 PWB)? |
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| No | Replace the engine board. |
▼ | Yes | Check the cable connection, replace the |
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| Recovered? |
| Yes | End |
▼ | No | Is each ID terminal connected correctly to the contact assembly? (See Figure 6.3.) |
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| No | Connect the ID terminals with the contact assembly correctly. |
▼ | Yes | Replace the ID unit. |
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Notes: 1. When replacing the engine board (K73 PWB), demount the EEPROM chip from the old engine board and remount it on the new one.
2. In case the EEPROM chip is not replaced, see Item (2) in Sec. 6.5.2.
41388601TH Rev.2 | 118 / |