Question about Xerox Phaser 8400 Laser Printer
From the service manual:
37,002.4x - PEST_FAULT_JSL_HEATER_DISCONNECT
PEST - Left jetstack disconnect.The left jetstack is not drawing the expected power from
1. Run the printhead Left Jetstack Heater test.
2. Verify printhead wiring.
Yes, could be faulty printhead, but could be faulty power supply as well.
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Posted on Mar 10, 2009
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Posted on Jan 02, 2017
Tips for a great answer:
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Engine stall or RPM fluctuates
is commonly caused by a dirty automatic idle speed control valve and
throttle valve. Buy a can of throttle valve cleaner (do not use
carburetor spray cleaner!) from NAPA or Carquest (made by CRC
chemicals) and spray it into the air intake while the engine is
running, use up about 1/2 the can, engine will try to stall hold the
speed up, shut it down and let it soak for 30 minutes, restart and
blow out the remaining fluid, shut it down and disconnect the
negative battery cable for 5 Min's to reset the base idle control
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