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Phaser 5500 Printer Service Manual
Fuser Failure - U4-7 Cold Sagging
The Fuser temperature regulation failed.
Note
Following display of this error, leave power applied for 7 minutes, then cycle
printer power. If the error reoccurs, proceed with troubleshooting procedure.
Applicable Error Code
Fuser Failure - U4-7 Cold Sagging
Fuser Thermistor Troubleshooting Procedure
Step
Actions and Questions
Yes
No
1
Check the Fuser installation.
Is the Fuser installed properly?
Go to Step 2.
Correct the
installation.
2
For FS1 Thermistor Only.
Is the resistance across P/J131-1 and P/
J131-2 more than or equal to 3 k-ohm?
Go to Step 3.
Replace the
Fuser
(page 8-76).
3
For FS2 Thermistor Only.
Is the resistance between P/J132-1 and
P/J132-2 greater than or equal to
3 k-ohm?
Go to Step 4.
Replace the
Fuser
(page 8-76).
4
For Pressure Roller Thermistor Only.
Is the resistance across P/J133-1 and P/
J133-2 greater than or equal to
3 k-ohm?
Go to Step 5.
Replace the
Fuser
(page 8-76).
5
Check the Fuser connection.
Is P/J6 connected?
Go to Step 6.
Connect P/J6.
6
Check continuity between the Fuser and
LVPS.
Is there continuity on each wire
between P/J600 <=> P/J6?
Go to Step 7.
Repair the wiring.
7
Check power to the Fuser
Is there +XX V across P/JXXX (+) <=>
ground?
Replace the Fuser
(page 8-76).
Replace the
LVPS
(page 8-92).
Summary of Contents for Phaser 5500
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