Specifications

•
The copier performs a self-diagnostic sequence to determine if the
microprocessor outputs a signal to each of the IC ports on the Master Board
PWB-A properly. It is intended to detect the following malfunctions (C03**). If
the microprocessor fails to output any of these signals or if any of the
electronic components on the board (driver IC, etc.) is faulty, the copier
determines that there is a faulty condition existing and shows the
corresponding malfunction code on the Touch Panel.
•
C0371/C0372 (data for serial communication) is used to determine whether
the output signal from the Master Board is transmitted to PWB-F and is sent
back correctly. C0373 (data for serial communication) is used to determine
whether the output signal from the Master Board is transmitted to PWB-G and
is sent back correctly.
•
C0374 (data for serial communication) is used to determine whether the output
signal from the Master Board is transmitted to PWB-A of the C-302 and is sent
back correctly.
∗ Code
Description (Input or
output signal fault)
Port on
Master
Board
Detection Timing
C0300
The HIGH signal required to
start the diagnostic
sequence of each port is not
input.
IC1A P85
•
When the "Board Check" of "I/O
Check" in the Tech. Rep. Mode is
executed.
C0311 AVR PWM IC1A P50
C0312
Upper Fusing Roller Main
Heater Lamp (H1) REM
IC1A P51
C0314
AE adjustment (PWB-H)
PWM
IC1A P60
C0315
Manual Feed Paper Pick-Up
Solenoid (SL9) DOWN
IC5A APA6
•
When the "Board Check" of "I/O
Check" in the Tech. Rep. Mode is
executed.
C0316
Manual Feed Paper Pick-Up
Solenoid (SL9) UP
IC5A APA7
C0317
Image Erase Lamp (LA3)
DATA
IC1A P64
C0318
Image Erase Lamp (LA3)
LATCH
IC1A P65
C0319
Image Erase Lamp (LA3)
CLK
IC1A P66
C031A
Image Erase Lamp (LA3)
STROBE
IC1A P67
C031B
Main Hopper Toner
Replenishing Motor (M14)
REM
IC4A APA3
C031D AVR REM IC5A BPA0
C031E SCAN signal IC5A BPA2
C031F
Separator Finger Solenoid
(SL6) REM
IC4A BPB2
•
When the "Board Check" of "I/O
Check" in the Tech. Rep. Mode is
executed.
•
When the "Board Check" of "I/O Check"
in the Tech. Rep. Mode is executed.
•
When a malfunction is detected.
•
When the "Board Check" of "I/O Check"
in the Tech. Rep. Mode is executed.
•
When a malfunction is detected.
C03
∗∗
(Control Board/Harness malfunctions)
T-41