Technical information

COPYRIGHT © 2001 CANON INC. 2000 2000 2000 2000 CANON CLC5000 REV.0 JAN. 2001
CHAPTER 5 TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS
5-116
4.1.11 E020
• Check the detail code of ‘E020’ using ‘JAM/ERR’ under ‘DISPLAY’ in service mode.
a.E020=XX30, XX31, XX35, XX36, XX3A, XX3B, XX40, XX41, XX42, XX43,
XX45, XX46, XX47, XX48, XX50, XX55, XXA0, XXA1, XXA5, XXA6, XXAA,
XXB0, XXB1, XXB2, XXB5, XXB6, XXB7 XXBF (high-order 2 digits representing
the color as XX=00 indicating all colors; 01, C; 02, M; 03, Y; and 04, Bk.)
Initial value setting
1) Execute ‘FUNC > INSTALL > INIT-C/M/Y’ and ‘SINIT-C/M/Y/K’
in service mode once again for the color for which ‘E020’ is indi-
cated. Is the problem corrected?
YES: End.
Developing assembly (uneven toner density)
2) Execute ‘STIR’ for the color for which ‘E020’ is indicated for ‘IN-
STALL’ under ‘FUNC’ in service mode. Is the problem corrected?
YES: End.
Developing assembly
3) Replace the developer of the color for which ‘E020’ is indicated,
and execute ‘FUNC > INSTALL > INIT’. Is the problem corrected?
YES: End.
Connector, Wiring
4) Are the connectors and wiring of the following connectors normal?
SALT sensor in every color
⇔⇔
⇔⇔
⇔ DC controller (J2228)
NO: Re-connect them.
Toner density sensor
DC controller PCB
5) Replace the toner density sensor of the color for which ‘E020’ is in-
dicated. Is the problem corrected?
YES: End.
• Be sure to replace the developer after replacing the toner density sensor.
NO: Replace the DC controller PCB.
SALT sensor
6) Is the front door open while the transfer frame front cover is re-
moved (i.e., is the SALT sensor subject to stray light)?
YES: Install the transfer frame front cover.
NO: Replace the SALT sensor.
•
Be sure to replace the developer after replacing the toner density sensor.
Photosensitive drum
7) Replace the photosensitive drum. Is the problem corrected?
YES: End.
NO: Replace the DC controller PCB.