bh1s.bk : bh1sdiag.doc 16 Thu Apr 20 12:42:16 1995
16
Service Manual
correct, replace the engine board.
If no other trouble is found replace the HVPS.
Blank Page
Inspect the printhead shutter for proper operation and make sure the
actuator on top of the cartridge is present and extends into the print-
head shroud when the printer top cover is closed. A failed printhead will
cause a 931 Service error rather than blank output.
Check the continuity of the HVPS cable. The HVPS and transfer roll
contacts should be clean and spring back when pressed. Make sure the
transfer roll contact under the left bearing is making contact with the
HVPS.
Run the Print Test with the RIP Board removed. Make the following volt-
age checks:
If the voltages are not correct replace the engine board.
Blurred or Fuzzy Print
This can be caused by a damaged gear train or by paper slippage in the
Connector
Voltage while
Printing
Voltage while
Idling
J13-1 to J13-4
+4.5VDC
0VDC
J13-2 to J13-4
+4VDC
0VDC
Connector
Voltage while
Printing
Voltage while
Idling
J13-1 to J13-4
Less than
5VDC
0VDC
J13-2 to J13-4
Less than
5VDC
0VDC
J13-3 to J13-4
(Fluctuates
between
pages)
+1.5VDC
0VDC
J13-8 to J13-4
Less than
1VDC
+6VDC
Summary of Contents for 3112
Page 1: ...S544 5256 00 3112 and 3116 Page Printer Service Manual ...
Page 10: ...x Service Manual ...
Page 16: ...xvi Service Manual ...
Page 50: ...34 Service Manual ...
Page 70: ...54 Service Manual ...
Page 79: ...Repair Information 63 ...
Page 89: ...Repair Information 73 ...
Page 91: ...Repair Information 75 ...
Page 93: ...Repair Information 77 ...
Page 95: ...Repair Information 79 ...
Page 101: ...Repair Information 85 ...
Page 106: ...90 Service Manual ...
Page 112: ...96 Service Manual ...
Page 116: ...100 Service Manual ...
Page 118: ...102 Service Manual ...
Page 120: ...104 Service Manual Gear Train ...
Page 121: ...Connector Locations 105 HVPS Transfer Roller Housing ...
Page 122: ...106 Service Manual Engine Board Connectors ...
Page 125: ...Connector Locations 109 Board Installation Hardware ...
Page 126: ...110 Service Manual Printhead Connector Locations ...
Page 130: ...114 Service Manual Printer Ground Straps ...
Page 136: ...120 Service Manual ...
Page 138: ...122 Service Manual Assembly 1 Covers ...
Page 140: ...124 Service Manual Assembly 2 Lower Frame ...
Page 142: ...126 Service Manual Assembly 3 Upper Frame ...
Page 144: ...128 Service Manual Assembly 4 Printhead ...
Page 146: ...130 Service Manual Assembly 5 Paper Feed ...
Page 148: ...132 Service Manual Assembly 5 Paper Feed Continued ...
Page 150: ...134 Service Manual Assembly 6 Paper Feed Alignment Gears ...
Page 152: ...136 Service Manual Assembly 7 Paper Feed Drive ...
Page 154: ...138 Service Manual Assembly 8 Standard Paper Tray 200 sheet ...
Page 156: ...140 Service Manual Assembly 9 Paper Tray 500 Sheet ...
Page 158: ...142 Service Manual Assembly 10 Base for Paper Drawer 500 Sheet ...
Page 160: ...144 Service Manual Assembly 11 Optional Paper Drawer 500 Sheet ...
Page 162: ...146 Service Manual Assembly 12 Fuser ...
Page 164: ...148 Service Manual Assembly 12 Fuser Continued ...
Page 166: ...150 Service Manual Assembly 13 Electronics ...
Page 168: ...152 Service Manual Assembly 13 Electronics Continued ...
Page 170: ...154 Service Manual Assembly 14 Transfer Roll ...
Page 172: ...156 Service Manual Assembly 15 Duplex Option ...
Page 174: ...158 Service Manual Assembly 16 Envelope and 100 Sheet Auxiliary Feeder ...
Page 178: ...162 Service Manual ...