bh1s.bk : bh1sdiag.doc 30 Thu Apr 20 12:42:16 1995
30
Service Manual
board. If the voltage is correct, check the continuity of the fan/mirror
motor cable. Replace the printhead if the cable is good.
Paper Size Sensing Problem
(The printed area does not fit on the page, or the paper size cannot be
changed from the operator panel.)
Make sure the paper tray and its stops are undamaged. Make sure the
cable to the paper size switch is connected correctly. With the paper
tray removed, the resistance of the paper size switch should be infinite.
With the tray installed, the resistance of the switch varies with the paper
size.
For Tray 1, remove the front cover, disconnect the cable from the sen-
sor and measure the resistance between the two pins on the sensor
board.
For 500-sheet option, remove the RIP Board, disconnect J15 from the
engine board, and measure between J15-3 and J15-4 on the cable.
If the readings do not match the following within 5% replace the paper
size sensor.
Regularly Spaced Marks
This is caused by a defect on one of the rolls or gears in the print pro-
cess. The damaged part can be determined by the spacing of the
marks according to the following table. Find and replace the damaged
part.
Tray installed and set to:
A5
1.4K Ohms (tray 1 only)
B5
2.0K Ohms
10.5”
3.0K Ohms
11”
4.7K Ohms
A4
8.0K Ohms
13” or 14”
17.8K Ohms (legal tray)
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Страница 121: ...Connector Locations 105 HVPS Transfer Roller Housing ...
Страница 122: ...106 Service Manual Engine Board Connectors ...
Страница 125: ...Connector Locations 109 Board Installation Hardware ...
Страница 126: ...110 Service Manual Printhead Connector Locations ...
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Страница 138: ...122 Service Manual Assembly 1 Covers ...
Страница 140: ...124 Service Manual Assembly 2 Lower Frame ...
Страница 142: ...126 Service Manual Assembly 3 Upper Frame ...
Страница 144: ...128 Service Manual Assembly 4 Printhead ...
Страница 146: ...130 Service Manual Assembly 5 Paper Feed ...
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Страница 150: ...134 Service Manual Assembly 6 Paper Feed Alignment Gears ...
Страница 152: ...136 Service Manual Assembly 7 Paper Feed Drive ...
Страница 154: ...138 Service Manual Assembly 8 Standard Paper Tray 200 sheet ...
Страница 156: ...140 Service Manual Assembly 9 Paper Tray 500 Sheet ...
Страница 158: ...142 Service Manual Assembly 10 Base for Paper Drawer 500 Sheet ...
Страница 160: ...144 Service Manual Assembly 11 Optional Paper Drawer 500 Sheet ...
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Страница 170: ...154 Service Manual Assembly 14 Transfer Roll ...
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Страница 174: ...158 Service Manual Assembly 16 Envelope and 100 Sheet Auxiliary Feeder ...
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