Xerox Phaser 6280 Service Manual page 357

Phaser 6280 Color Laser Printer Service Manual
Troubleshooting Procedure Table (continued)
Step Actions and Questions
7 Check the Toner Sensor Harness for
continuity.
1. Disconnect P/J Harnesses from the MCU
Board and the Print Cartridge Sensor.
Yellow: P/J19 and P/J191
Magenta: P/J19 and P/J192
Black: P/J19 and P/J193
Cyan: P/J19 and P/J194
2. Check continuity between P/J
connectors:
Yellow: P/J19 pin <=> P/J191
Magenta: P/J19 <=> P/J192
Black: P/J19 <=> P/J193
Cyan: P/J19 <=> P/J194
8 Check the Print Cartridge Sensor signal.
1. Disconnect P/J19 from the MCU Board.
2. Is there +3.3 V across the Toner Sensor
Harness?
Yellow: J19-1 pin <=> J19-2 pin
Magenta: J19-4 pin <=> J19-5 pin
Black: J19-7 pin <=> J19-8 pin
Cyan: J19-10 pin <=> J19-11 pin
Check the Print Cartridge Sensor for
9
operation.
1. Measure the voltage across:
Ground <=> P/J19-3 pin (Yellow)
Ground <=> P/J19-6 pin (Magenta)
Ground <=> P/J19-9 pin (Black)
Ground <=> P/J19-12 pin (Cyan)
2. Does the voltage change when the paper
is inserted into the sensor detecting
point?
General Troubleshooting
Yes No
Go to step 8. Replace the
Toner Sensor
Harness.
Go to step 9. Replace the
MCU Board
(page 8-86).
Replace the Replace the
MCU Board Print
(page 8-86). Cartridge
Sensor
(page 8-55)
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