Diagnostic Information
25
4039-1XX
On models 10R/12R/12C/12L, a DC-DC convertor changes
+34VDC at J9-1 into +5VDC, +12VDC, and -12VDC. Check for
+5VDC at J8-1 and for +34VDC at J9-1 and at J11-4. Replace the
DC-DC convertor, the system board, or the LVPS depending on
where the voltage is incorrect.
Paper Feed Problem, 500-Sheet Second Tray
Remove the module and inspect the tray, the module D-roll bias
spring, the gear train, and the paper feed magnet spring. Make sure
the gear train is meshing with the drive gear at the bottom of the
printer. Look for other mechanical problems or damage. Make sure
the cable connector is in good condition. The resistance of the paper
feed magnet should be 100 Ohms to 250 Ohms. If paper is not
feeding correctly check the magnet adjustment.
Paper Feed, Base Printer
Run the print test or the diagnostic paper feed test and carefully
examine the area of the problem.
If paper is not feeding, make sure the paper is in the tray correctly
and is not damaged or stuck together. Make sure the D-roll is in
good condition and rotates when the magnet is picked. With the 500-
sheet trays, make sure the tension wheel is set high enough to give
good contact between the D-roll and the paper stack.
10R/12R/12C/12L/16L: Make sure the pick magnet is being
energized. The pick magnet should have a resistance of 100 to 250
Ohms. The voltage at (10R/12R/12C/12L) J22-2 (16L) J19-2 should
be +34V between picks, and drop to about +30VDC (it actually drops
to zero but most meters will not react quickly enough) briefly during
the pick; listen for the noise of the solenoid at the same time the
voltage changes. The magnet can be tested by shorting pin 2 to
ground and listening for it to pick.
10P: The 10P has a torquer motor to activate the D-roll. It is
connected at J22 of the system board, the voltage check is the same
as the 10R/12R/12C/12L/16L. The resistance of the motor is 88
Ohms. The motor can be tested by shorting pin 2 to ground and
listening for it to pick.
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 ...