Canon PC800 Series Service Handbook page 52

CHAPTER 2 STANDARDS AND ADJUSTMENTS
2. Adjusting the Intensity of the Scanning Lamp
Adjust the intensity of the scanning lamp if you have replaced any of the following:
• DC controller PCB
• Composite power supply PCB (See p.2-37.)
• Scanning lamp
Caution:
If you have performed this adjustment, you must always perform AE adjustment.
Making Adjustments
1) Set a cartridge in the machine.
2) Set the density correction switch (SW101) to its middle index.
3) Turn off the AE mechanism, and set the copy density adjusting lever on the control panel to its
middle index.
4) Place the Test Sheet on the copyboard, and make a copy.
5) Turn VR107 on the DC controller PCB gradually until gray scale No. 9 is barely visible.
2-38
Figure 2-63
J130 J114
J107 J103
VR103VR102
Figure 2-64
VR107 and Copy Density
Direction of VR107
Clockwise
Counterclockwise
Table 2-7
SW101
VR107
J102
VR104 VR105VR106
VR107
J106
J104
J105
J109
Copy density
Lighter
Darker