Canon MF735C Series Service Manual page 296

■ CCD
COPIER (Service mode for copier) > FUNCTION (Operation / inspection mode) > CCD
DF-WLVL1
Detail
Use Case
Adj/Set/Operate Method
Caution
Related Service Mode
Supplement/Memo
DF-WLVL2
Detail
Use Case
Adj/Set/Operate Method
Caution
Related Service Mode
Supplement/Memo
CL-AGC
Detail
Use Case
Adj/Set/Operate Method
Related Service Mode
Supplement/Memo
White level adj in book mode: color
To adjust the white level for copyboard scanning automatically by setting the paper which is usually
used by the user on the Copyboard Glass.
- When replacing the Copyboard Glass
- When replacing the Scanner Unit
- When replacing the Main Controller PCB/clearing RAM data
1) Set a paper on the Copyboard Glass.
2) Select the item, and then press Yes key.
Be sure to execute DF-WLVL2 in a row.
COPIER> FUNCTION> CCD> DF-WLVL2
The Scanner Unit (for front side) calculates the white level correction coefficient based on the
luminance at copyboard reading detected with DF-WLVL1, the luminance at stream reading
detected with DF-WLVL2, and the luminance at stream reading that the Scanner Unit (for back
side) detected with DF-WLVL2.
White level adj: stream reading, color
To adjust the white level for stream reading by setting the paper which is usually used by the user
on the DADF.
- When replacing the Copyboard Glass
- When replacing the Scanner Unit
- When replacing the Main Controller PCB/clearing RAM data
1) Set paper on the DADF.
2) Select the item, and then press Yes key.
Be sure to execute this item after DF-WLVL1.
COPIER> FUNCTION> CCD> DF-WLVL1
The Scanner Unit (for front side) calculates the white level correction coefficient based on the
luminance at copyboard reading detected with DF-WLVL1, the luminance at stream reading
detected with DF-WLVL2, and the luminance at stream reading that the Scanner Unit (for back
side) detected with DF-WLVL2.
Adj Scan Unit (frt) B&W ref: stream, clr
To automatically adjust the black/white reference level of the Scanner Unit (for front side) at stream
reading in color mode.
To make the adjustment with both resolutions 300 dpi and 600 dpi.
When this item is executed, the values of OFST-CL0/CL1/CL2, GAIN-CL0, LED-CL-R/G/B,
OFST2CL0/CL1/CL2, GAIN2CL0, and LED2CL-R/G/B are automatically calculated.
- When replacing the Reader Unit
- When replacing the Scanner Unit
1) Set paper on the DADF.
2) Select the item, and then press Yes key.
COPIER> FUNCTION> CCD> BW-AGC
COPIER> ADJUST> CCD> OFST-CL0/CL1/CL2, GAIN-CL0, LED-CL-R/G/B, OFST2CL0/CL1/
CL2, GAIN2CL0, LED2CL-R/G/B
AGC: Automatic Gain Control
287
9. Service Mode