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20-02, 20-10, 20-11, 20-12, 20-21, 20-26 (bizhub 4750i/4050i)
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Contents
| JAM type | Misfeed at vertical transport section (When PF-P20 or PF-P21 is installed) | |
| JAM code | 20-02, 20-10, 20-11, 20-12, 20-21, 20-26 | |
| JAM detection timing | 20-02: For paper fed from the tray 2/3, 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. | |
| 20-10: The leading edge of the paper is not turned OFF (blocked) the tray 2 transport sensor (PS6/2) even after the lapse of a given period of time after the tray 2 starts to feed paper. | ||
| 20-11: The leading edge of the paper is not turned OFF (blocked) the tray 3 transport sensor (PS6/3) even after the lapse of a given period of time after the tray 3 starts to feed paper. | ||
| 20-12: The leading edge of the paper is not turned OFF (blocked) the tray 2 transport sensor (PS6/2) even after the lapse of a given period of time after the tray 3 starts to feed paper. | ||
| 20-21: The leading edge of the paper is not turned ON (unblocked) the tray 2 transport sensor (PS6/2) even after the lapse of a given period of time after the tray 3 starts to feed paper. | ||
| 20-26: The leading edge of the paper is not turned ON (blocked) the registration sensor (PS9) even after the lapse of a given period of time after the tray 2/3 starts to feed paper. | ||
| – Paper jam of a sheet of paper left at the vertical transport section results, if a sheet of paper is determined to exist at a position detected when the main power switch is turned ON, a door is opened and closed, or a misfeed or malfunction is reset. | ||
| Misfeed processing location | -Right door -Tray 2 right door -Tray 3 right door | |
| Relevant parts | -Main motor (M1) -Tray 2 drive motor (M1/2) -Tray 3 drive motor (M1/3) -Registration clutch (CL4) -Tray 2 transport clutch (CL2/2) -Tray 3 transport clutch (CL2/3) -Registration sensor (PS9) -Tray 2 transport sensor (PS6/2) -Tray 3 transport sensor (PS6/3) -Base board (BASEB) -Tray 2 PC control board (PCCB/2) -Tray 3 PC control board (PCCB/3) |
Procedure
| Step | Action | Control signal | Location of electrical component |
|---|---|---|---|
| 1 | Initial check items | – | – |
| 2 | PS9 I/O check, sensor check | BASEB CN22EA-13 (ON) | 13-C |
| 3 | PS6/2, PS6/3 I/O check, sensor check | PCCB/2 CN3-3 (ON)PCCB/3 CN3-3 (ON) | 17-X |
| 4 | CL4 load check • Check code: 21 • Multi code: 3 | BASEB CN22EA-3 (ON) | 12-C |
| 5 | CL2/2, CL2/3 load check • Check code: 21 • Multi code: 1, 2 | PCCB/2 CN5-1 (ON)PCCB/3 CN5-1 (ON) | 15-P |
| 6 | M1 load check (Main body) • Check code: 40 • Multi code: 1, 2 | BASEB CN17E-1 to 5 | 1-C |
| 7 | M1/2, M1/3 load check • Check code: 28 • Multi code: 1, 2, 3, 4 | PCCB/2 CN4-1 to 7PCCB/3 CN4-1 to 7 | 18-P |
| 8 | Replace PCCB/2 or PCCB/3. PF-P21 (Part# AAJUH00100) | – | – |
| 9 | Replace BASEB. 4750i (Part# ACT9H02013) 4050i (Part# ACT9H02002) | – | – |