Lexmark 7300 Series, Service Manual

Page: 37 / 88

4418-X6X
Diagnostic information
2-17
Paper Pick
Assembly Check the paper pick motor connector J17 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 paper pick
motor. If the voltage is incorrect, replace the system
board. Go to
“System board removal” on page 4-14 .
If the voltage is correct, replace the printer base with
the cover and paper pick assembly. Go to
“Printer
base with cover and paper pick assembly removal”
on page 4-23
.
Check the pick roller for wear. If the pick roller is worn
and causing a paper feed problem, replace the printer
base with cover and paper pick assembly. Go to
“Printer base with cover and paper pick assembly
removal” on page 4-23
.
ADF Scanner Lid
Assembly Check the ADF paper feed motor connector J4 on the
system board for proper connection.
Check the ADF paper feed sensor connector J15 on
the system board. If it is connected, check for
approximately 1.2 V dc on pin 1 and 3.2 V dc on pin 3.
If the voltage is incorrect, replace the ADF scanner lid
assembly. Go to
“ADF scanner lid assembly
removal” on page 4-5 .
Midframe
Assembly Check the following for wear:
• Small feed rollers
• Large feed roller
• Exit roller
• Star rollers
If any of the rollers are worn and causing a paper feed
problem, replace the print engine. Go to
“Print engine
removal” on page 4-17 .
End-of-Forms
Flag Check for binds or damage. If the flag is defective,
replace the print engine. Go to
“Print engine
removal” on page 4-17 .
ADF
End-of-Forms
Flag Check for binds or damage. If the flag is defective,
replace the ADF scanner lid assembly. Go to
“ADF
scanner lid assembly removal” on page 4-5 .
Unit/Problem Action