Lexmark 7003-050 X340n, Service Manual

Page: 39 / 162

2-18
Service Manual
7003-XXX
Disconnects on the controller card
Always print a page from each paper source following a repair action. The following table is an aid to find a
problem with a cable connection.
Error or message
if cable is
unplugged Condition
required to
obtain error Check
connectio
n at:
Connector name and description
No backlight and
no text on the
operator panel POST. No power
delivered to
controller card J7 HVPS-LVPS (low voltage power supply)
No backlight, no
text on operator
panel POST J5 OP-PANEL (operator panel)
Go to “Dead machine service check” on
page 2-22 .
917 POST J19 FAN
924.01 POST J15 TH1 (thermistor)
929 Print multiple
pages J18 MPF SENSOR (multipurpose feeder sensor and
toner sensor)
931 POST J12 LSU (laser printhead)
935 POST J11 MMTR (mirror motor)
936 POST J9 MAIN MOTOR (transport motor)
940 POST J13 LVPS (low voltage power supply control)
Front Cover
Open Pls close
cover POST J13 CO (cover open switch)
Load MP Feeder Pick paper from
MPF J101 SOL (multipurpose feeder solenoid)
Paper Empty
Pls add paper
Pick paper from
tray 1 J101 SOL (paperfeed solenoid)
31.05 Missing
or invalid
print
cartridge POST J14 SC (smart chip)
Unlock Scanner
Scanner Lock POST J4 CCD