Lexmark 3200 Service Manual page 30

3.2.2 Tables
The tables in this section provide detailed troubleshooting information.
3.1.1.7 The Power LED does not go on
Cause
Unplugged from
outlet
AC power
unplugged at unit
Power switch is
OFF
Power unit AC
input connector
disconnected
Power switch
connector
disconnected
Power unit-main
PCBA connection
failure
Power unit output
voltage failure
PCBA Failure
LED board-main
PCBA connection
failure
N N N N = Check method explains how to check the failed item.
The visual check can be made by physically observing the part or observing the offline test
display on the front panel. The tester check is made by checking the voltage levels of the
relevant units. (See section 4.6)
✸ = Refer to section 4.6.
Relevant Unit Check Method
N N N N
None Visual check
None Visual check
None Visual check
None Visual check
None Visual check
None Visual check
Power unit Output voltage
(+5V) check
✸
*main control PCBA Tester check (+5V,
GND)
*LED board
✸
None Visual check
Maintenance
Method
Insert the AC plug
into the outlet.
Insert the AC cable
into unit.
Turn the power
switch on.
Connect the
connector.
Connect the
connector.
Connect the
connector.
Replace the power
unit
Remove the cause
or replace the
PCBA.
Connect the
connector
Table 3.1
3-8
Remark
None
None
None
None
None
None
None
None
None