10/00
2-172
Phaser 790/DocuColor 2006
010-355
Initial Issue
Status Indicator RAPs
010-355 Fuser Overheat Error RAP
The sensed Fuser Temperature has exceeded the maximum allowable temperature. A Fuser
Overheat error was declared.
Initial Actions
Inspect the Fuser area (especially around the Temperature Sensor) for any damage, foreign
material, debris or other signs of wear, breakage or excessive heat damage. Perform any nec-
essary cleaning or maintenance in the Fuser area. If the problem persists, continue with this
RAP.
NOTE: The Thermal Fuse and the Thermostat are physically located on the Upper Plate (PL
8.2).
Procedure
Remove the Rear Cover REP 14.6. Switch off the Copier/Printer and disconnect the power
cord. Continuity is measured between J 34-1 and J34-2 on the Low Voltage Power Sup-
ply.
Y
N
Continuity is measured between J71-1 and J71-2.
Y
N
Continuity is measured between J 79-1 and J79-2.
Y
N
Remove the Upper Plate REP 10.4. Check for continuity directly across the
Pressure Roll Heat Lamp and the Heat Roll Heat Lamp. If continuity is NOT
measured, replace the Heat Lamps as required (PL 8.3). Also check for conti-
nuity directly across the Thermal Fuse and the Thermostat. If continuity is NOT
measured across either component, replace the Upper Plate (PL 8.2).
Go to Flag 1. Check for an open circuit. Repair or replace the Fuser Harness (PL
8.5) as required.
Go to Flag 2. Check for an open circuit. Repair or replace the Fuser Connector Harness
or the Main Harness (PL 11.1) as required.
Disconnect the connector from J 32 on the Low Voltage Power Supply (LVPS). An open cir-
cuit (NO continuity) is measured between J32-2 of the disconnected connector and
GND.
Y
N
A short circuit is causing the ‘Heater On’ signal to be constantly available. Repair or
replace the Main Harness (PL 11.1) as required. If the problem persists, replace the MCU
PWB (PL 11.2).
Reconnect J 32 to the LVPS. Access the Digital Output (DO) test from the Control Panel. Enter
code [47]. Measure the voltage between J 32-2 of the LVPS and GND. Press the Item/Enter
button. The measured voltage is approxi4.5VDC and momentarily goes to
approxi3.2VDC, then recovers, when the Item/Enter button is pressed.
Y
N
Replace the MCU PWB (PL 11.2).
Go to 010-701 Faulty Temperature Sensor RAP to troubleshoot the problem.
Summary of Contents for Phaser 790
Page 4: ...10 00 ii Phaser 790 DocuColor 2006 Initial Issue Introduction...
Page 10: ...10 00 1 2 Phaser 790 DocuColor 2006 Initial Issue Service Call Procedures...
Page 46: ...10 00 2 32 Phaser 790 DocuColor 2006 002 702 Initial Issue Status Indicator RAPs...
Page 80: ...10 00 2 66 Phaser 790 DocuColor 2006 005 704 Initial Issue Status Indicator RAPs...
Page 130: ...10 00 2 116 Phaser 790 DocuColor 2006 007 713 Initial Issue Status Indicator RAPs...
Page 150: ...10 00 2 136 Phaser 790 DocuColor 2006 008 707 Initial Issue Status Indicator RAPs...
Page 180: ...10 00 2 166 Phaser 790 DocuColor 2006 009 704 Initial Issue Status Indicator RAPs...
Page 193: ...10 00 2 179 Phaser 790 DocuColor 2006 010 700 Status Indicator RAPs Initial Issue...
Page 204: ...10 00 2 190 Phaser 790 DocuColor 2006 010 705 Initial Issue Status Indicator RAPs...
Page 220: ...10 00 2 206 Phaser 790 DocuColor 2006 011 706 Initial Issue Status Indicator RAPs...
Page 226: ...10 00 2 212 Phaser 790 DocuColor 2006 016 370 Initial Issue Status Indicator RAPs...
Page 234: ...10 00 3 2 Phaser 790 DocuColor 2006 Initial Issue Image Quality...
Page 245: ...10 00 3 13 Phaser 790 DocuColor 2006 IQ8 Image Quality Initial Issue...
Page 254: ...10 00 3 22 Phaser 790 DocuColor 2006 IQ18 Initial Issue Image Quality...
Page 258: ...10 00 4 4 Phaser 790 DocuColor 2006 Initial Issue Repairs and Adjustments...
Page 268: ...10 00 4 14 Phaser 790 DocuColor 2006 REP 1 13 Initial Issue Repairs and Adjustments...
Page 276: ...10 00 4 22 Phaser 790 DocuColor 2006 REP 4 9 REP 4 10 Initial Issue Repairs and Adjustments...
Page 290: ...10 00 4 36 Phaser 790 DocuColor 2006 REP 5 10 Initial Issue Repairs and Adjustments...
Page 312: ...10 00 4 58 Phaser 790 DocuColor 2006 REP 7 8 Initial Issue Repairs and Adjustments...
Page 366: ...10 00 4 112 Phaser 790 DocuColor 2006 REP 9 22 REP 9 23 Initial Issue Repairs and Adjustments...
Page 382: ...10 00 4 128 Phaser 790 DocuColor 2006 REP 10 19 Initial Issue Repairs and Adjustments...
Page 420: ...10 00 4 166 Phaser 790 DocuColor 2006 ADJ 11 1 Initial Issue Repairs and Adjustments...
Page 512: ...03 01 6 2 Phaser 790 DocuColor 2006 General Procedures and Information...
Page 534: ...03 01 6 24 Phaser 790 DocuColor 2006 GP 23 General Procedures and Information...
Page 546: ...03 01 6 36 Phaser 790 DocuColor 2006 General Procedures and Information...
Page 548: ...10 00 7 2 Phaser 790 DocuColor 2006 Initial Issue Wiring Data...
Page 586: ...10 00 7 40 Phaser 790 DocuColor 2006 Initial Issue Wiring Data BSD 1 1 Figure 1 Main Power On...
Page 592: ...10 00 7 46 Phaser 790 DocuColor 2006 Initial Issue Wiring Data BSD 2 1 Figure 1 Control Panel...
Page 607: ...10 00 7 61 Phaser 790 DocuColor 2006 Wiring Data Initial Issue BSD 5 4 Figure 1 Document Exit...
Page 612: ...10 00 7 66 Phaser 790 DocuColor 2006 Initial Issue Wiring Data BSD 6 5 Figure 1 Image Input...
Page 627: ...10 00 7 81 Phaser 790 DocuColor 2006 Wiring Data Initial Issue BSD 8 6 Figure 1 Registration...
Page 641: ...10 00 7 95 Phaser 790 DocuColor 2006 Wiring Data Initial Issue BSD 10 1 Figure 1 Fusing...