Canon NP6251 Service Manual page 791

CHAPTER 11 TROUBLESHOOTING
Code
• Main motor (M1; fault)
E010
• DC controller PCB (fault)
• Waste toner feeding screw (error)
• DC controller PCB (fault)
E013
• Pick-up motor (M2; fault)
E015
• DC controller PBC (fault)
• Hopper motor (M10, M11; fault)
• Toner level detection circuit inside
developing assembly (fault)
E020
• Toner level detection circuit inside
hopper (fault)
• DC controller PCB (fault)
• Hopper connector (disconnected)
• Total copy counter (open circuit)
E030
• DC controller PCB (fault)
• Accessories copy counter (open circuit)
• DC controller PCB (fault)
E031
• Electromagnetic clutch (CL15) for
vertical path drive (harness broken)
• Deck main motor (M101; fault)
• Slide deck drive PCB (fault)
• DC controller PCB (fault)
E043
• Holding tray X home position sensor
(PS21; fault)
• Holding tray X motor (M8; fault)
• DC controller PCB (fault)
E050
11-260
COPYRIGHT © 1997 CANON INC.
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Cause
CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
Description
• After the main motor drive signal
has been generated, 2 or more
pulses are not received every 1 sec.
• The waste toner feeding screw
cannot rotate, and the switch
(MSW4) is pressed several times
within a specific period of time.
• After the pick-up motor drive signal
has been generated, 2 or more
pulses are not received every 1 sec.
• During copying, the toner supply
signal is '0' (toner absent) for 2 min
or more.
• During installation, the toner supply
signal does not go '1' in 10 min or
more when executing toner supply
sequence.
• When the total copy counter is off,
an open circuit is detected in the
total counter.
• When the accessories counter is off,
an open circuit is detected in the
accessory counter.
• During initial rotation, clock pulses
of the deck main motor are not
received for 1.4 sec or more.
• During copying, clock pulses of the
deck main motor are not received
for 2.8 sec or more.
• While the holding tray X motor (M8)
drive signal is being generated, the
holding tray X home position signal
(HTXHP) is not generated with 4
sec.
• While the holding tray X motor (M8)
drive signal is being generated, the
holding tray X home position signal
(HTXHP) is generated for 2 sec or
more.