Canon NP6621 Service Handbook page 110

SERVICE MODE
4. Using Adjustment Mode ('3') and
Machine Settings Mode ('5')
1) Press the numeric keypad to change the num-
ber.
• The number flashes.
• If the number is negative, '%' turns ON. To
enter a negative number, press the % key and
enter the number on the numeric keypad.
2) Press the AE key.
• The machine stores the value and stops
flashing the value.
• A press on the Start key starts copying opera-
tion.
3) To change the number once again, repeat
steps 1) and 2).
4) Press the Clear key to return to item selection.
5. Using Operation/Inspection Mode
('4')
1) Press the Start key to execute the selected
service mode.
2) Press the Stop key to stop and return to item
selection.
• If the mode is designed to stop automatically,
the machine stops and automatically returns
to item selection.
6. Resetting Error Codes (back-up
codes)
If 'E000', 'E001', 'E002', 'E003',or 'E004' is
indicated, remove the cause of the error and reset
the code that has been backed up.
1) Open the front door, and insert the door switch
actuator.
2) While holding down the service mode switch
(SW850) on the service PCB with a hex key,
press the power switch.
3) Turn OFF/ON the power switch.
7–2
7. Recording on the Service Label
Figure 7-701 shows the label attached behind
the front door. Each machine is adjusted and set at
the factory, and the appropriate values are re-
corded on the label.
Be sure to record any new settings you entered
in the field on the label. Further, if you have replaced
the DC controller, be sure to enter the settings
recorded on the label.
If you have replaced the drum unit or the com-
posite power supply, be sure to enter the settings
recorded on the labels attached to the drum unit or
composite power supply (service parts), and record
these settings on the label.
Program
Meaning
302 AE curve shift
303
AE curve slope
304
Fixing offset temperature
305
Register
306
Leading edge
307
Register B-side
308
Leading edge B-side
309
Trailing edge
310
Stack-bypass tail
311
Blank home
312
Blank home reduction
315
APVC voltage
316
APVC current
318
ATVC compensation
319
Stack-bypass loop
320
Main register loop
321
C1_cl_off
322
C2_cl_off
323
C3_cl_off
324
Duplex paper stack adj
325
Duplex inversion roller
326
Halogen lamp intensity
327
Duplex input loop
328
Duplex output loop
Figure 7-701
Value