Question about Xerox Phaser 7700 Laser Printer

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I have a phaser 7700dn and the error code 44 has come up fuser sub lamp failure

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THIS IS THE TEXT FROM THE PHASER 7700 SERVICE MANUAL, HOWEVER, SEE MY COMMENTS AT THE END OF THE QUOTE.

11 06-372 ERROR 11 LASER UNIT POLYGON MOTOR FAILURE
Note
If this failure reoccurs three times successively, an Engine NVRAM
value is set preventing further printer use until the Clear Tech Rep
Fault, Clear <09-380 ~ 09-383> is run.
Remove Rear Cover (RRP 1, on page 7-154).
Disconnect P400 (see figure page 2-46) and P401 (see figure page 2-46) on the Engine Control
Board.
Inspect both connectors to determine they are fully engaged as a unit. Re-engage, if necessary.
Note The two connectors can NOT properly seat into their socket(s)
unless they are both engaged as a unit. Ensure there is no
separation.
Carefully reinsert the plugs into their joint socket and FIRMLY seat them.
Replace the Laser Unit (RRP 38, on page 7-200).
Note Whenever the mounting screws for the Laser Unit have been
loosened, it is necessary to recalibrate the unit by performing the
RegiCon Adjustment Procedure beginning on page 4-124.
If the problem persists, replace the Engine Control Board (RRP 42, on page 7-206).

It has been my experience that 90% of the time the scanner motor (polygon motor) has gone bad. I have repaired many 7700 printers with this error by replacing the laser scanner. The part can be purchased at: http://www.lpscomputer.com/p-3060-1-116-1110-00-laser-unit.aspx

Posted on Jun 02, 2010

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0500 is a fuser failure error. Need to replace fuser.

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Error Code Probable Cause
12 No error detected
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Xerox Phaser 4500 printer has a U4 fuser code.


Hi,

From the Xerox Phaser 4500 Service Manual (here), the main problems could be one of:

  • Warm-up failure - Fuser warm-up not complete within 110 seconds after
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  • Cool-down error - Cool-down process not complete within 200 seconds.
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It could be that your fuser needs to be replaced, but as you can see that code relates to a couple of problems, so even replacing the Fuser might not fix the problem.

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1 Answer

DP 2500 displaying E04-01


You have a failure in the Fusing Unit:
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1. Fuser Thermistor is dirty.
2. Thermistor position is incorrect.
3. Fuser temperature is low.
4. Thermistor is defective.
5. Fuser Lamp connector is disconnected.
6. Fuser Thermostat is defective.
7. Fuser Lamp is defective.
8. HTC PCB connector (CN716) is disconnected
You can try resetting the error by using this key sequence:
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The service manual does not list an error code for "21".
Here are the error codes:

Error Code Probable Cause
12 No error detected
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Code 11 on display. "Laser unit cannot find a home position." Does the laser need to be replaced? How much would this cost?


Yes the laser has to be replace.
If you have checked that all the connections from the laser to the engine control board.
If it all of a sudden gave the code 11 then that means you have to replace it.

That laser comes at a price of $500 to $700. refurbished.
part# 116-1110-00-EX

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2 Answers

Sharp AR-M237 Error Code H4-21


-H4-21 means:Sub heater lamp abnormally low temperature detection. The setup temperature (about –25°C: Sim 43-1-1) is not reached within the specified time (about 32sec) from turning on the power ON SW. (When the temperature falls below 140°C in the standby mode.)
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When the lamp blinks normally: Check the thermistor and the harness. Check the MCU PWB thermistor input circuit.
When the lamp does not light: Check for disconnection of the heater lamp and thermostat. Check the interlock switch. Check the power PWB and the MCU PWB lamp control circuit.
Clear the display of self-diagnostics with SIM 14.
The H4 errors will not reset by themselves. You must enter service mode to reset this error even if the problem has been repaired. The reset process is outlined below (DO NOT USE ANY OTHER FUNCTIONS IN SERVICE MODE):
Press the following sequence: "#/P" "*" "C" "*"
Type in 1 4
Press start
hit 1 for yes
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Unit should power off and the restart.
If the error code recurrs ther are other problems.

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PHASER 7700 ERROR 30


try this
The following functions will generate a Tech Rep Fault:
  • Error: 30: Belt Home Too long
  • Errors: 12, 13, 14, 15: ATC-YMCK Sensor Fail
  • Errors: 40, 44: Fuser Main/Sub Lamp Temp Too High
  • Enter Service Diagnostics
  • Highlight NVRAM Access and press OK
  • Highlight Clear Tech Rep Faults and press OK
  • Highlight the Tech Rep fault to be cleared and press OK


If you have had the error 3 consecutive times , you do need to send the snippet to the printer to clear the error. The instructions how to do it are in the download.
Other things. You may need to replace the accumulator belt.
You may have toner backed up in the waste auger, you can clean that out and replace the waste bottle.
Cause:
The plastic tab attached to the cleaning blade assembly was broken, this tab opens the cleaning blade waste assembly when the belt is lowered .
Solution: thumbsup.gif Fixed! thumbsdn.gif Did not fix. The waste toner from accumulator belt cleaner could not reach the waste bin and jammed the augur. This caused the grinding noise by stalling the accumulator belt motor. This causes an error 30 code to be displayed.
The belt cleaner does come as a separate part 016-1889-00 and is very easy to fit and much cheaper than a new belt assembly.
Error 30 is a Tech Rep fault. After three Error 30's, the NVRAM Clear Tech Rep Faults will need to be reset to be able clear the Error 30 message.

Mar 04, 2008 | Xerox Phaser 7700 Laser Printer

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