Canon GP215 Service Manual page 317

Code
The high-voltage (primary charg-
E064
ing, transfer charging, developing)
output is faulty.
• Composite power supply PCB
(faulty)
• DC controller PCB (faulty)
• Wiring (faulty; short circuit, open
circuit)
A BD error has occurred.
E100
• Laser unit (faulty)
• BD PCB (faulty)
• Laser driver PCB (faulty)
• Image processor PCB (faulty)
The laser scanner motor fails to
E110
lock.
• Laser scanner motor (M3;
faulty)
• Laser scanner driver PCB
(faulty)
• DC controller PCB (faulty)
The RAM has an error.
E190
An error has occurred in serial
E191
communication between the DC
controller PCB and the composite
power supply PCB.
The scanner home position cannot
E202
be detected.
• No code indi- • Scanner home position sensor
cation. (PS1; faulty)
• Keys on con- • Scanner motor (Faulty)
trol panel • DC controller PCB (faulty)
locked.
• Scanning lamp (error activation)
E220
• Scanning lamp (faulty)
• Composite power supply PCB
(faulty)
• DC controller PCB (faulty)
An error in the communication with
E240
the DC controller PCB has
occurred.
• DC controller PCB (faulty)
• Image processor PCB (faulty)
COPYRIGHT © 1996 CANON INC.
Main cause
CANON GP215/200 REV.0 JULY 1996 PRINTED IN JAPAN (IMPRIME AU JAPON)
3. OPERATIONS AND TIMING
Description
• The difference between the high-voltage
control signal and the actual high-voltage
output is more than a specific value.
• Any of the primary charging roller, transfer
charging roller, and developing bias has
an output error.
• The BD signal is not generated within 2
sec after the laser has been turned on.
• The BD signal cycle has a discrepancy.
• A specific speed is not reached after the
laser scanner motor drive signal has been
generated.
• The speed deviates after it has reached a
specific speed.
• The communication data is not updated
for 8 sec or more.
• The check sum of the communication data
is different for three times in a row.
• The scanner does not return to home
position after it has started to move.
• Activation of the lamp has been detected
during standby.
• Deactivation of the lamp has been detect-
ed during copying.
• An error has been detected in the commu-
nication between the DC controller PCB
an the image processing PCB.
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