Lexmark X548 Series, Service Manual

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Service Manual
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Dead printer service check
A dead printer is a condition where the display is blank, the LED on the operator panel is off, the fan does not
turn, no motors turn, and the fuser does not heat.
If a 650-sheet duo drawer is installed, remove the option and check the base printer for correct operation. If the
base printer operates correctly, replace the 650-sheet duo drawer.
Warning:
Observe all necessary ESD precautions when removing and handling the RIP board or any installed
option cards or assemblies. See
“Handling ESD-sensitive parts” on page 4-1
.
Remove any input paper handling options from the printer.
Step Questions / actions Yes No
1
Check the AC line voltage.
Is the line voltage correct?
Go to step 2. Inform the customer.
2 Is the AC line cord damaged?
Replace the line cord. Go to step 3.
3 Is the JLVPS1 cable correctly connected at
JLVPS1 on the RIP board?
Go to step 5. Reconnect the JLVPS1
cable, and go to step 4.
4
Turn the printer off, and then on.
Does the problem persist?
Go to step 5. Problem resolved.
5 Warning:
Damage to the printer is possible.
Be careful to touch only one conductor at a
time. Rest the probe against the connector to
steady it.
With the printer on.verify the following values
at JLVPS1:
Are the values approximately correct?
Replace the RIP board. See
“RIP board removal” on
page 4-19
.
Replace the LVPS. See
“Low-voltage power
supply (LVPS) assembly
removal” on page 4-48
.
JLVPS1 (exposed conductors)
Pin Value Pin Value
1 +5 V dc 2 Ground
3 +5 V dc 4 Ground
5 +5 V dc 6 Ground
7 +24 V dc 8 Ground
9 +24 V dc 10 Ground
11 +24 V dc 12 Ground
16 Ground