Lexmark 4310-VW SERIES, Service Manual

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2-13
Service Manual
Lexmark S800 Series
Service checks
System board service checks
Symptom Action
Dead machine Check the power supply connector J4, pin 1 for approximately 30 V dc. If voltage is
incorrect, replace the power supply. If voltage is correct, check all other connectors on
the system board. If connectors are okay, replace the system board. See
“System
board with media sensor, cable, and spring removal” on page 4-21
.
• Carrier transport
motor does not
operate.
• Paper feed motor
does not operate.
• Control panel buttons
do not work.
• Power light does not
come on.
• Tank access and end-
of-forms sensors do
not work.
• Check the carrier transport motor connector J2 on the system board. If it is
connected, check for approximately 30 V dc on pins 1 and 2 or at the wire
connections located on the rear of the carrier transport motor. If voltage is
incorrect, replace the system board. See
“System board with media sensor,
cable, and spring removal” on page 4-21 . If voltage is correct, then replace
the frony lid. If the front lid does not correct the problem, then replace the All-In-
One.
• Check the paper feed motor connector J3 on the system board. If it is
connected, check for approximately 30 V dc on pins 1 and 2. If the voltage is
incorrect, then replace the system board. See
“System board with media
sensor, cable, and spring removal” on page 4-21 . Although the paper feeds
turns in one direction, the paper feed motor turns in two directions. If the paper
feed motor turns in one direction only, then replace the system board.
• If the control panel buttons do not work or the power light does not come on,
then replace the front lid.
• If the tank access or end-of-forms sensors do not work, then replace the system
board. See “System board with media sensor, cable, and spring removal”
on page 4-21 .
• If it is determined that the tank access or End-of-Form sensor does not function
correctly, then replace the print engine.