3-18 Phaser 6300/6350 Color Laser Printer Service Manual
3
Check the Registration Sensor connection.
Is the Registration Sensor connected to the
harness?
Go to Step 4. Connect the
sensor.
4
Check all pins of the REGISNR Harness
PL4.1.4 for continuity.
1. Disconnect P/J181 and P/J18.
2. Check continuity between J181 <=> J18.
Go to Step 5. Replace the
Registration
Sensor Harness.
5
Check the Registration Sensor signal.
Block the Registration Sensor.
Verify the voltage between P/J18-3 <=>
P/J18-2 on the Engine Control Board is 0
VDC.
Replace
Registration Sensor
(
page 8-36).
Go to Step 6.
6
If possible, print a Test Print from
Tray 1 (MPT).
Does the Main Motor function properly?
Go to Step 16 Go to Step 7
7
Test the Main Drive Assembly.
Run the Service Diagnostics Main Motor
test.
Does the Main Motor turn?
Replace the Engine
Control Board
(
page 8-104).
Go to Step 8.
8
Check for +24 V to the Main Drive Motor
1. Disconnect P/J481.
2. Close the Interlock Switch while testing.
Is there +24 V across J481-10 <=> J481-8?
Go to Step 12. Go to Step 9.
9
Test the Interlock Switch.
Run the Service Diagnostics Interlock
Switch test.
Does the Interlock Switch function
correctly?
Go to Step 11. Go to Step 10.
10
Check for +5 V to the Interlock Switch
Disconnect P/J161.
Is there +5 V across P161-1 <=> P161-2?
Replace the LVPS. Replace the
Interlock Switch
(
page 8-101).
11
Check FAN/PHD/MOT Harness continuity.
1. Disconnect P/J48 and P/J481.
2. Check continuity between J48 <=> J481
Replace Main Drive
Motor
Replace FAN/
PHD/MOT
Harness.
12
Check Turn Roller function.
1. Perform Steps 1 ~ 3 on (page 8-21).
2. Open and close the front door.
3. Observe the Turn Roller.
Does the Turn Roller turn while the
machine is warming up?
Go to Step 16. Go to Step 13.
Troubleshooting Procedure Table (Continued)
Step Actions and Questions Yes No
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