Xerox Phaser 6180 - Page 302

4-68 Phaser 6180 Color Laser Printer Service Manual
General Troubleshooting
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 <=> P/J191
■ Magenta: P/J19 <=> P/J192
■ Black: P/J19 <=> P/J193
■ Cyan: P/J19 <=> P/J194
Go to step 8. Replace the
Toner Sensor
Harness.
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 <=> J19-2
■ Magenta: J19-4 <=> J19-5
■ Black: J19-7 <=> J19-8
■ Cyan: J19-10 <=> J19-11
Go to step 9.
■ Replace the
MCU Board
(page 8-87).
9 Check the Print Cartridge Sensor for
operation.
1. Measure the voltage across:
■ Ground <=> P/J19-3 (Yellow)
■ Ground <=> P/J19-6 (Magenta)
■ Ground <=> P/J19-9 (Black)
■ Ground <=> P/J19-12 (Cyan)
2. Does the voltage change when the paper
is inserted into the sensor detecting
point?
Replace the
MCU Board
(page 8-87).
Replace the
Print
Cartridge
Sensor:
■ Black
(page 8-53)
■ Yellow/
Magenta/
Cyan
(page 8-54)
Troubleshooting Procedure Table (continued)
Step Actions and Questions Yes No