Sharp Z-21 Service Manual page 31

2
Turn off the power and remove the seal cover in the paper exit
side.
3
Short the main PWB pins JP210 and JP211, and turn on the
power.
Sensor cover
JP210
VR202
4
When the misfeed indicator blinks, turn on the copy exposure key.
5
When the toner indicator blinks, turn the VR202 more than 2 steps
in either direction to light the toner indicator. Then turn the VR202
again to adjust.
6
Turn on the copy exposure key.
7
The LIGHT lamp lights up and the auto exposure mode adjust-
ment is performed automatically.
8
After completion of the adjustment, the auto exposure lamp blinks.
9
Turn on the copy exposure key twice to make a copy. (Exposure
display: Standard)
If the copy exposure is proper, check the auto exposure level. →
•
F
Go to step .
•
If the copy exposure is not proper, repeat procedures from step
4
.
<<Standards>>
Check that "6" of the UKOG-0162FCZZ is slightly copied.
(When too light): Turn the VR202 counterclockwise.
(When too dark): Turn the VR202 clockwise.
4 5
Not copied
Slightly copied
F
Check that the misfeed indicator blinks, and turn on the copy
exposure key.
G
Check that the toner indicator blinks, and turn on the copy ex-
posure key again.
H
The copy lamp lights up and the auto exposure lamp blinks.
I
Turn on the copy exposure key once to set to the auto adjustment
mode, and make a copy.
JP211
6 7 8
Copied
•
If the copy exposure is proper, the adjustment is completed.
•
If the copy exposure is not proper, go to step (4) again.
<<Standards>>
Check that "4" of the UKOG-0162FCZZ is slightly copied.
<When too light>: Turn the VR202 counterclockwise.
<When too dark>: Turn the VR202 clockwise.
2
Not copied
J
Perform procedures of step (10) to step (12).
K
Check that the auto exposure lamp blinks, and turn the VR202
more than 2 steps clockwise or counterclockwise to light up the
auto exposure lamp.
L
Perform the auto exposure adjustment.
M
Turn on the copy exposure key once to set to the auto mode, and
make a copy.
•
If the copy exposure is proper, the adjustment is completed.
•
If the copy exposure is not proper, repeat procedures from step
J
.
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3 4 5 6
Copied
Slightly copied