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7) Press the AE key.
• The indication changes to ‘EE’.
8) Press the Start key.
• The indication returns to ‘450’.
9) Turn off and on the power switch.
• The copier clears the backup RAM, and returns the default settings.
Reference:
To cancel RAM clearing, press the Clear key and then the Reset key. To cancel it
after having finished step 8), press the Start key once again; when ‘noP’ is
indicated, press the Start key once again.
3. Checking the Photointerrupters
The copier allows checking the photointerrupters with a conventional meter or in
service mode.
a. Using a Meter
1) Set the meter to the 12VDC range.
2) Connect the (–) probe of the meter to J301-4 (GND) on the DC controller.
3) Make checks as indicated.
1: 5V
0: 0V
Reference:
All photointerrupters except PS1, PS2, PS3, PS6, and PS9 are connected in the
form of a matrix, and for this reason may show variations if checked by a meter; use
service mode for these photointerrupters.
b. Using Service Mode
1) Open the front door, and insert a door switch actuator into the door switch.
2) Press the service mode switch (SW302) with a hex key.
3) Press [2] on the keypad.
• The copier indicates ‘2’.
4) Press the AE key.
• The copier activates I/O display mode, and indicates ‘201’.
5) Enter a number with the keypad, and press the Start key.
• The copier checks each photointerrupter; see the copy count indicator.
Figure 10-242
10-36
CHAPTER 10 TROUBLESHOOTING
COPYRIGHT
©
1997 CANON INC. CANON NP6218 REV. 0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
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