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20-01, 20-02, 20-20 (bizhub 950i/850i)
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Contents
| JAM type | Misfeed at vertical transport section | |
| JAM code | 20-01, 20-02, 20-20 | |
| JAM detection timing | 20-01 | The registration sensor (PS38) is not turned ON even after the lapse of a given period of time after the leading edge of the paper has turned ON the tray 1 vertical transport sensor (PS4). |
| 20-02 | For paper fed from the tray 2, tray 3, tray 4, or LU-205/LU-303, loop forming has not been complete before a sheet enters the registration roller because the rise timing of load to perform registration is earlier than the rise timing of load to form a loop. | |
| 20-20 | The tray 1 vertical transport sensor (PS4) is not turned ON even after the lapse of a given period of time after the leading edge of the paper has turned ON the tray 2 vertical transport sensor (PS12). | |
| Misfeed processing location | -Right bottom door -Manual bypass tray door | |
| Relevant parts | -Tray 1 vertical transport motor (M5) -Tray 2 vertical transport motor (M7) -Tray 1 vertical transport sensor (PS4) -Tray 2 vertical transport sensor (PS12) -Registration sensor (PS38) -Paper feed/transport drive board (PFTDB) -Base board (BASEB) | |
Procedure
| Step | Action | Control signal | Location of electrical component |
|---|---|---|---|
| 1 | Initial check items | – | – |
| 2 | PS4 I/O check, sensor check | PFTDB CN14-8 (ON) | 13-P |
| 3 | PS38 I/O check, sensor check | PFTDB CN2-5 (ON) | 8-P |
| 4 | PS12 I/O check, sensor check | PFTDB CN12-10 (ON) | 1-P |
| 5 | M5 load check -Check code: 28 -Multi code: 9, 10, 11, 12 | PFTDB CN10-5 to 8 | 18-P |
| 6 | M7 load check -Check code: 28 -Multi code: 13, 14, 15, 16 | PFTDB CN10-9 to 12 | 18-P |
| 7 | PFTDB F27 conduction check. | – | – |
| 8 | Replace PFTDB. | – | – |
| 9 | Replace BASEB. | – | – |