Canon PC400 Service Manual - Page 151

After Replacing the Scanning Lamp Unit, Intensity Sensor, or AE Sensor, Set the Test Sheet NA3/NB3/NA2

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C (VR604) CHAPTER 10 TROUBLESHOOTING Control panel PCB C (R614) Figure 10-202B (PC400/FC200) b. After Replacing the Scanning Lamp Unit, Intensity Sensor, or AE Sensor (Before Adjustment) • If the scanning lamp has blackened, replace it. • Clean the scanning system (lens array, lamp reflector, lamp). 1) Set the cartridge to the copier. 2) De-select AE, and set the copy density control lever/dial to the center. 3) Set the density correction switch (SW606) to the center (PC420/430/FC220). 4) Set the Test Sheet (NA3/NB3/NA2), and make a copy. 5) Check if the copy is free of fogging, and gray scale No. 9 (No. 10, if NB3) is some- what visible. • If too dark, Turn VR604 on the control panel PCB clockwise slightly to increase the intensity. • If too light, Turn VR604 counterclockwise slightly to decrease the intensity. 6) Repeat steps 4) and 5) until the density is optimum. Notes: After adjusting the intensity, be sure to adjust the AE mechanism (PC420/430/FC220). COPYRIGHT © 1998 CANON INC. CANON PC400/420/430,FC200/220 REV.0 JAN.1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 10-7

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COPYRIGHT © 1998 CANON INC.
CANON PC400/420/430,FC200/220 REV.0 JAN.1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 10 TROUBLESHOOTING
10-7
C (VR604)
Control panel PCB
C (R614)
Figure 10-202B (PC400/FC200)
b.
After Replacing the Scanning Lamp Unit, Intensity Sensor, or AE Sensor
(Before Adjustment)
• If the scanning lamp has blackened, replace it.
• Clean the scanning system (lens array, lamp reflector, lamp).
1)
Set the cartridge to the copier.
2)
De-select AE, and set the copy density control lever/dial to the center.
3)
Set the density correction switch (SW606) to the center (PC420/430/FC220).
4)
Set the Test Sheet (NA3/NB3/NA2), and make a copy.
5)
Check if the copy is free of fogging, and gray scale No. 9 (No. 10, if NB3) is some-
what visible.
• If too dark,
Turn VR604 on the control panel PCB clockwise slightly to increase the intensity.
• If too light,
Turn VR604 counterclockwise slightly to decrease the intensity.
6)
Repeat steps 4) and 5) until the density is optimum.
Notes:
After adjusting the intensity, be sure to adjust the AE mechanism
(PC420/430/FC220).