Konica-Minolta bizhub 654e

Tray 1 feed section

Detection timing

11-01	The leading edge of the paper does not turn ON the tray 1 vertical transport sensor (PS4) even after the lapse of a given period of time after the tray 1 starts to feed paper.
11-02	For paper fed from the tray 1, due to a delay in paper arrival, loop forming in front of the registration roller is not complete before the rise timing of the registration motor.
11-40	For paper fed from the tray 1, the image write start signal permit continues to be disabled for a predetermined period of time after the timing of the image write start signal output.
-	The tray 1 vertical transport sensor (PS4) is turned ON when the main power switch is turned ON, a door or cover is opened and closed, or a misfeed or malfunction is reset.
-	When the main power switch is turned ON, the tray 1 vertical transport sensor (PS4) is turned ON while the tray 1 paper feed sensor (PS5) is OFF.

Relevant parts

• Take-up motor (M22)
• Tray 1 paper feed clutch (CL1)
• Tray 1 vertical transport sensor (PS4)
• Tray 1 paper feed sensor (PS5)
• Paper feed/transport drive board (PFTDB)
• Printer control board (PRCB)

Step	Action	Control signal	Location
1	Initial check items
2	PS4 I/O check, sensor check	PFTDB CN15-8 (ON)	1-P
3	PS5 I/O check, sensor check	PFTDB CN15-5 (ON)	1-P
4	CL1 operation check	PFTDB CN15-14 (REM)	2-P
5	M22 operation check	PFTDB CN7-5 to 8	12-X
6	PFTDB ICP1, ICP3 or ICP12 conduction check
7	Replace PFTDB
8	PRCB ICP13 conduction check
9	Replace PRCB