Canon 1000 Service Manual page 748

7. TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS
RF
The CPU on the RF's controller PCB is
equipped with a mechanism to check the condition
of the machine (sensors, in particular).
Code
• Data communication with copier
E400
(faulty)
• Pick-up motor (M1; faulty)
E401
• Pick-up roller home position
sensor 1 (S8; faulty)
• Belt motor (M3; faulty)
E402
• Belt motor clock sensor (S11;
faulty)
• Reversing motor (M2; faulty)
E403
• Slip sensor (S10; faulty)
• Delivery motor (M5; faulty)
E404
• Delivery motor clock sensor
(S12; faulty)
• Pick-up motor (M1; faulty)
E405
• Pick-up motor clock sensor (S12;
faulty)
• Pick-up motor (M6; faulty)
E407
• Tray position sensor (S25; faulty)
• Feeding motor (M8; faulty)
E408
• Feeding motor clock sensor
(S22; faulty)
• Registration sensor 1 (S3; faulty)
• Skew sensor 1 (S4; faulty)
• Manual feed registration sensor
E411
(S19; faulty)
• Image leading edge sensor (S20;
faulty)
• Original sensor 1 (S7; faulty)
7-312
COPYRIGHT © 2001 CANON INC.
and indicates on the copier's control panel the
presence of an error upon detection.
Cause
CANON CLC1000/1000S/3100 REV.2 MAY 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)
The mechanism runs a check as necessary
Description
• Communication with the copier is monitored
at all times. The communication is disrupted
for 5 sec or more.
• The sensor state does not change even
after the pick-up motor has been driven for
more than 2 sec.
• The number of belt motor clock pulses is
less than a specific value for 100 ms.
• The number of slip clock pulses is below a
specific value for 100 ms.
• The number of delivery motor clock pulses
is below a specific value for 200 ms.
• The number of pick-up motor clock pulses is
below a specific value for 200 ms.
• The sensor state does not change even the
tray ascent motor is driven for 2 sec or
more.
• The number of feeding motor clock pulses is
below a specific value for 100 ms.
• The output of each sensor in the absence of
paper is higher than a specific value.