Input Sensor Service Check; Exit Sensor Service Check - Lexmark C520 Series Service Manual

Input sensor service check

FRU
1 Input sensor flag
2 Input sensor/sensor cable
3 System card

Exit sensor service check

FRU
1 Exit sensor flag
2 Input sensor/sensor cable
3 System card
Action
Check the input sensor flag for damage and proper operation. If a
problem is found, replace the paper pick mechanism. Go to
pick mechanism assembly removal" on page
Check connector JTRAY1 for proper connection to system card,
cable for pinch points and cable or connector for any other damage.
With the printer turned on, place a voltmeter between JTRAY1 pin2
and ground. Initially, meter should indicate 5VDC. Activate input
sensor flag–voltage level should drop to approximately 0VDC. If input
sensor cable is damaged or sensor operation is incorrect, replace
paper pick mechanism. Go to
removal" on page 4-30.
If input sensor is free of damage and operates correctly, replace
system card. Go to "System card removal" on page
Action
Check the exit sensor flag for damage and proper operation. If a
problem is found, replace the fuser. Go to
page 4-13.
Check connector JFUSER1 for proper connection to system card,
cable for pinch points and cable or connector for any other damage.
With the printer turned on, place a voltmeter between JFUSER1 pin 7
and ground. Initially, meter should indicate 5VDC. Activate exit
sensor flag–voltage level should drop to approximately 0VDC. If
sensor operation is incorrect, go to
service check" on page 2-32.
If sensor operation in previous step is correct, replace system card.
Go to "System card removal" on page
4-30.
"Paper pick mechanism assembly
4-47.
"Fuser removal" on
"120.04-07—Fuser error
4-47.
Diagnostic information
5022-xxx
"Paper
2-63