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Xerox Phaser 7700 displays error 7-276 - Printers & Copiers

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  • billy498 Sep 16, 2008

    I am having a similar problem except the machine is diplaying error 7-277. Can you tell me what this service code indicates. I suspect it is a paper tray sensor since the other message is similar but would like to know for sure. Thanks

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Here is the documentation on that error


07-276 TRAY 3 PAPER SIZE SENSOR BROKEN (TTM)
EXPLANATION
An abnormal AD value was detected from the Tray 3 Paper Size Sensor.
Refer to BSD: CH7.4 CH7.13A
Procedure
Set Tray 3 in the machine.
Between Tray Module PWB J548-11 (3T: J548-11 , TT: J548-11) (+) GND (-)
Is the voltage the same as that in the Tray 3 Paper Size Sensor Output Table inscribed in BSD: CH7.4?
Yes No
Between Tray 3 Paper Size Sensor J820-2 (3T: J820-2 TT: J820-2 ) (+) GND (-)
Is the voltage the same as that in the Tray 3 Size Sensor Output Table inscribed in BSD: CH7.4?
Yes No
Between Tray 3 Paper Size Sensor J820-1 (3T: J820-1 TT: J820-1 ) (+)J820-3 (3T: J820-3 TT: J820-3) (-)
Is the voltage +5VDC?
Yes No
Using the wire network from Chapter 7, check the +5VDC circuits to Tray 3 Paper Size Sensor J820-1
(3T: J820-1 TT: J820-1 ).
(WN 7.3.6 +5VDC-2)
Check for malfunctioning paper guide, poor contact caused by bending in the projection that pushes the switch, and
if there is no problem, change the Tray 3 Paper Size Sensor. (PL16.1)
Check for cut wires, poor connections between Tray 3 Paper Size Sensor J820-2 (3T: J820-2 TT: J820-2 ) and Tray Module
PWB J548-11 (3T: J548-11, TT: J548-11)
Change the following parts successively:
TRAY MODULE PWB (PL16.9)
MCU PWB (PL13.1)
ESS PWB (PL13.1 ).

Posted on Apr 26, 2008

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