Canon CP660 Service Manual page 374

CHAPTER 10 TROUBLESHOOTING
7. BIAS
Use this item when adjusting the level of the secondary transfer bias to suit various
environmental and printing conditions.
Sub Menu
TR-N1H For a H/H environment, use it to adjust the sec-
ondary transfer bias for single-sided printing or
first side printing of double-sided printing on
plain paper.
TR-N2M For a N/N environment, use it to adjust the sec-
ondary transfer bias for second side printing of
double-sided printing on plain paper.
TR-N2H For a H/H environment, use it to adjust the sec-
ondary transfer bias for second side printing of
double-sided printing on plain paper.
TR-N2L For a L/L environment, use it to adjust the sec-
ondary transfer bias for second side printing of
double-sided printing on plain paper
TR-N2N/L For a N/L environment, use it to adjust the sec-
ondary transfer bias for second side printing of
double-sided printing on plain paper.
8. WRITE MEMORY
This memory is used to write the various adjustment data items (e.g., PARAMETER,
BIAS) read into the RAM on the printer board to the EEPROM on the printer board and
the EEPROM on the DC controller PCB.
Printer board
RAM
EEPROM
• Using WRITE MEMORY
1) Select <WRITE MEMORY>.
2) Press the ENTER key to select <WRITE TO DCON>.
3) Using the
4) Press the ENTER key to execute.
5) See that 'WRITE TO DCON EXECUTING' is indicated.
6) Turn off and then on the power to end.
10-92
COPYRIGHT © 1999 CANON INC.
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Description
Writing
key, select 'YES'.
or
Writing
CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
Remarks
Settings: 0 to +15
Standard: +8
Enter setting, and exe-
cute 'WRITE MEMORY'.
Adjustment in the field is
not usually needed.
DC controller PCB
EEPROM