Sharp AR-C200P (serv.man5) Service Manual ▷ View online
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4
Up/Down movement error of the image drum unit (ID)
•
Turn the printer OFF, then turn it ON after a few seconds.
•
Are all ID drums rotating properly during print operation?
• No Is the ID motor resistance within the regulated value (approx. 8.6Ω)?
No Replace the faulty IDU motor.
▼• Yes Is 34V output to F3 and F5 on the engine board?
No Replace the low-voltage power unit.
▼• Yes Check the cable connections, then replace the engine board.
▼• Yes
Is the IDU sensor terminal functioning properly?
No Check the gear mesh status and sensor terminal function, the replace the gear or sensor
terminal.
▼• Yes
Is the ID sensor terminal functioning properly?
(Check the JODEN connector pin signal on the driver board (K7N PXB).)
Pin 12
: IDU sensor - yellow
Pin 2
: IDU sensor - magenta
Pin 4
: IDU sensor - cyan
Pin 14
: IDU sensor - black
Are all at 5V level or 0V level?
No Replace the connection board (N71 PWB).
▼• Yes
Check the cable connection between the connection board (N71 PWB) and engine board
(K7N PWB), then replace the engine board.
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5
Fuser unit error
•
Do fuser errors occur right after power ON?
(A)
• Yes Is the heat roller thermister disconnected or generating a short circuit? (See Fig. 5-1)
(Approx. 190k-980kΩ in room temperature of 0-43 degrees Celsius.)
•
Yes Replace the fuser unit.
▼• No Is the back-up roller thermister disconnected or generating a short circuit? (See Fig. 5-1)
(Approx. 190k-980kΩ in room temperature of 0-43 degrees Celsius.)
•
Yes Replace the fuser unit.
▼• No
▼• No
Does a fuser unit error occur approx. three minutes after power ON?
• No Proceed to (A).
▼• Is the heater in the fuser unit turned ON? (Is it hot?)
• Yes Replace the engine board.
▼• No Replace the fuser unit.
▼• No
Is AC voltage output between CN1 connector pin 1 and pin 3 in the low-voltage power unit?
• No Replace the low-voltage power unit.
▼• Yes
Replace the fuser unit.
Figure 5.1
▼
Back-up roller thermister
Heat roller thermister
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5
Motor fan error
•
Does the low-voltage power fan rotate at power ON?
• No Is 34V output to fuse F7 on the engine board (K7N PWB)?
•
No Is 34V output to the power connector on the engine board (K7N PWB)?
34V: Pin 12, 13, 14
No Check the cable connections, then replace the low-voltage power unit.
▼• Yes Replace the engine board.
▼• Yes Was the low-voltage power board replaced?
•
Yes End.
▼• No Replace the low-voltage power board.
▼• Yes
Does the engine board fan rotate at power ON?
• No Is 34V output to fuse F7 on the engine board (K7N PWB)?
•
No Is 34V output to the power connector on the engine board (K7N PWB)?
34V: Pin 12, 13, 14
No Check the cable connections, then replace the low-voltage power unit.
▼• Yes Replace the engine board.
▼• Yes Replace the engine board fan.
▼• Yes
End.
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Abnormal Image
Flowchart No.
The entire image is faint or the colour is irregular. (Figure 5.2- A )
1
The white portion is dirty. (Figure 5.2- B )
2
A white page is output. (Figure 5.2- C )
3
Streaks or solid lines appear in the vertical direction.
4
(Black line, colour line / black streak, colour streak) (Figure 5.2- D )
White solid lines / streaks or blurred colour lines / streaks appear in the vertical
White solid lines / streaks or blurred colour lines / streaks appear in the vertical
5
direction. (Figure 5.2- F )
Faulty fusing (image blurs or scatters when touched)
Faulty fusing (image blurs or scatters when touched)
6
Consistent abnormality (Figure 5.2- E )
7
Colour detachment
8
Colour irregularity
9
Different colour compared with the original.
0
5.5.3 Troubleshooting for abnormal images
Apply remedies according to the following table when printed images are abnormal as shown
below.
Figure 5.2
Faint or blurred
A
Vertical lines/streaks
D
Dirty white portion
B
Consistent abnormality
E
All white
C
Vertical white lines/streaks
F
