Diagnostic information 2-27
5025-2xx, 4xx
Dead printer service check
A dead printer is one which, when powered on from a known good electrical outlet, displays no indication of
power to the printer by changes to the LCD, LED, or any movement of the fan or motors. If the printer appears
dead but makes a beeping sound, check the operator panel. See “Operator panel display blank, five beeps”
on page 2-37.
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 controller 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 powervoltage
power voltage.
Is the line voltage correct?
Go to step 2. Inform the customer.
2
Is the AC power cord damaged? Replace the line cord. Go to step 3.
3
Is the LVPS cable correctly connected at
JLVPS1 on the controller board?
Go to step 5. Reconnect the cable at
JLVPS1, and then 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 controller
board. See “Controller
board removal” on
page 4-20.
Replace the LVPS. See
“Low-voltage power
supply (LVPS) assembly
removal” on page 4-51.
CAUTION
When you see this symbol, there is a danger from hazardous voltage in the area of the product
where you are working. Unplug the product before you begin, or use caution if the product
must receive power in order to perform the task.
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
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