3-72 Phaser 6300/6350 Color Laser Printer Service Manual
Rear Fan Failure
The Rear Fan rotation signal indicates the fan is no longer operational.
Applicable Status Code:
Code 51: Rear Fan Failure
Troubleshooting Reference Table
Applicable Parts Wiring and Plug/Jack References
■ Rear Fan, PL1.1.19
■ LVPS, PL9.1.6
■ Engine Control Board, PL9.1.16
■ LV Harness, PL10.1.2
■ Print Engine Map 2 - P/J Locator (page 10-6)
■ Print Engine Power Wiring (page 10-17)
Troubleshooting Procedure Table
Step Actions and Questions Yes No
1
Check the Rear Fan for damage.
Remove the Rear Cover.
Is the fan damaged?
Replace the Rear
Fan (
page 8-102).
Go to Step 2.
2
Check the Rear Fan connection.
Is P/J166 connected to the harness?
Go to Step 3. Connect the Fan.
3
Check orientation of the Rear Fan.
Does the Fan’s label face inwards?
Go to Step 4. Correct the
installation.
4
Test the Rear Fan.
Run the Service Diagnostics Rear Fan test.
Does the fan operate?
Go to Step 6. Go to Step 5.
5
Check for +24 V to the fan.
Disconnect P/J166.
Is there +24 V across P166-1 <=> P166-3?
Replace the Rear
Fan (
page 8-102).
Replace the LVPS
(
page 8-99).
6
Check the fan rotation signal to the LVPS.
Print one sheet.
Is there +3.3 V between P/J166-1 <=>
P/J166-3?
Replace the Fuser
Fan (
page 8-66).
Go to Step 7.
7
Check the rotation signal from the LVPS.
Print one sheet.
Is there +3.3 V between P/J165-15 <=>
P/J165-3?
Replace the LVPS
(
page 8-99).
Go to Step 8.
8
Check the fan rotation signal at the Engine
Control Board.
Print one sheet.
Is there +3.3 V between P/J61-4 <=>
P/J61-16?
Replace the LV
Harness
Replace the
Engine Control
Board
(
page 8-104).
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