Canon NP6251 Service Manual page 793

CHAPTER 11 TROUBLESHOOTING
Code
• Scanner locked sensor (PS48; fault)
• Scanner locking solenoid (SL1;
fault)
E213
• DC controller PCB (fault)
• Lamp regulator (fault)
• DC controller PCB (fault)
E220
• DC controller PCB (fault)
E240
• DC controller PCB (fault)
• Control panel PCB (fault)
E243
• DC controller PCB (fault)
E710
• DC controller PCB (fault)
E711
• RDF controller PCB
E712
• Connector (poor contact)
• 24V power supply (poor contact)
• Sorter controller PCB (fault)
E713
• Connector (poor connection)
• 24V power supply
11-262
COPYRIGHT © 1997 CANON INC.
Cause
CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
Description
• During copying in stream reading
mode, the scanner locked sensor
signal (SCLK) is not generated
within a specific period of time.
• The scanner does not stop at the
scanner original leading edge 2
sensor (PS4).
• During standby, the scanning lamp
turns on.
• During copying, the scanning lamp
turns off.
• The lamp ON detection signal
(CVRON) is generated although the
scanning lamp ON signal (LAON) is
'0'.
• There is an error in the
communication between the
microprocessor master (Q156) and
the microprocessor slave (Q140) on
the DC controller PCB.
• An error has occurred in the
communication between the master
(Q156) on the microprocessor on
the DC controller PCB and the
microprocessor on the control panel
PCB.
• At power-on, the copier detects an
error in communication between
copier and external device because
of an error in the copier's
communication IC (Q158).
• After power-on, the copier detects
an error in communication between
copier and external device because
of an error in the copier's
communication IC (Q158).
• The communication control IC on
the RDF controller PCB goes out of
order.
• The communication control IC on
the sorter controller PCB goes out
of order.