28
Service Manual
4039-1XX
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 that paper trays for the 4019, 4028, or 4029 are not being
used in the 4039 printer.
Make sure the paper tray and its stops are undamaged. Make sure
the cable to the paper size switch is connected correctly.
Disconnect (10P/10R/12R/12C/12L) J19 (16L) J16 from the system
board before making the following measurements. With the tray
removed, make sure there is no continuity from (10P/10R/12R/12L/
12C) J19-3 to J19- 4 (16L) J16-3 to J16-4 on the cable; replace the
paper size switch if the resistance is not infinite.
The resistance from (10P/10R/12R/12L/12C) J19-3 to J19-4 (16L)
J16-1 to J16-2 varies with the paper size. With the tray installed, if
the readings do not match the following within 5% replace the paper
size sensor.
If the problem is with the 500-sheet option, the resistance from (10P/
10R/12R/12L/12C) J17-3 to J17-4 (16L) J14-3 to J14-4 should be
infinite with no tray installed, or with the tray installed, should match
the table.
A5
1.4 K Ohms (tray 1 only)
B5
2.0 K Ohms
10.5”
3.0 K Ohms
11”
4.7 K Ohms
A4
8.0 K Ohms
13” or 14”
17.8 K Ohms (legal tray)
Summary of Contents for 4039 - B/W Laser Printer
Page 69: ...Repair Information 55 4039 1XX ...
Page 77: ...Repair Information 63 4039 1XX ...
Page 79: ...Repair Information 65 4039 1XX ...
Page 83: ...Repair Information 69 4039 1XX ...
Page 85: ...Repair Information 71 4039 1XX D B C A ...
Page 87: ...Repair Information 73 4039 1XX ...
Page 91: ...Repair Information 77 4039 1XX B A ...
Page 93: ...Repair Information 79 4039 1XX F E B F D C ...
Page 105: ...Repair Information 91 4039 1XX ...
Page 113: ...Repair Information 99 4039 1XX ...
Page 116: ...102 Service Manual 4039 1XX Gear Train ...
Page 117: ...Connector Locations 103 4039 1XX HVPS ...
Page 120: ...106 Service Manual 4039 1XX System Board Connectors 10R 12R 12L ...
Page 122: ...108 Service Manual 4039 1XX System Board Connectors 16L ...
Page 124: ...110 Service Manual 4039 1XX System Board Connectors 10P J21 J14 J11 ...
Page 132: ...118 Service Manual 4039 1XX Toner Shield to Lower Frame Load Box Shaft to Upper Frame ...
Page 139: ...Parts Catalog 125 4039 1XX Assembly 1 Covers 1 14 2 1A 12 1B 17 10 4 3 16 15 11 9 8 27 5 6 7 ...
Page 151: ...Parts Catalog 137 4039 1XX Assembly 4 Printhead System Board 9 2 7 6 4 3 1 8B 8A 8 ...
Page 157: ...Parts Catalog 143 4039 1XX Assembly 6 Paper Feed Alignment Gears ...
Page 161: ...Parts Catalog 147 4039 1XX Assembly 8 Standard Paper Tray 200 sheet 1 5 2 3 4 6 ...
Page 163: ...Parts Catalog 149 4039 1XX Assembly 9 Paper Tray 500 Sheet 5A ...
Page 165: ...Parts Catalog 151 4039 1XX Assembly 10 Base for Paper Drawer 500 Sheet 4 4 2 1 3 ...
Page 173: ...Parts Catalog 159 4039 1XX Assembly 13 Electronics 5A 7 13 6 9 11 5 4A 4 3 18 1 18 23 21 22 ...
Page 177: ...Parts Catalog 163 4039 1XX Assembly 14 Transfer Roll ...
Page 181: ...Parts Catalog 167 4039 1XX Assembly 16 Envelope and 100 Sheet Auxiliary Feeder ...