Dc Power Service Check - Lexmark 13P0195 - C 750dn Color Laser Printer Service Manual

DC power service check

The machine is partially operative, a motor turns, display is on or the power-on LED may be on or off.
Step Actions and questions
1 Does the printer beep 5 times and the operator panel
display all diamonds?
2 DC power to engine board—turn the power off and
disconnect the LVPS cable to J9 on the engine board.
Turn the power on and check the following voltages on
the LVPS cable.
J9-1 +3.3 V dc
J9-2 +5 V dc
J9-3 +5 V dc
J9-4 +24 V dc
J9-5 +24 V dc
J9-6 Ground
J9-7 Ground
J9-8 Ground
J9-9 Ground
J9-10 Ground
Note: All voltages are approximate values.
Are the voltages correct?
3 DC voltages at RIP board—turn the power off and
disconnect the LVPS cable to J23 on the RIP board.
Turn the power supply assembly power on and check
the following voltages on the LVPS cable:
J23-1 Ground
J23-2 Ground
J23-3 Ground
J23-4 Ground
J23-5 Ground
J23-6 Ground
J23-7 Ground
J23-8 Ground
J23-9
J23-10 +3.3 V dc
J23-11 +3.3 V dc
J23-12 +3.3 V dc
J23-13 +5.0 V dc
J23-14 +5.0 V dc
J23-15 +5.0 V dc
J23-16 +24 V dc
Note: All voltages are approximate values.
Are the voltages correct?
Yes No
Go to "Operator Go to step 2
panel LCD/status
LED/buttons
service check" on
page 2-132.
Go to step 3 Replace the LVPS.
See
power supply
(LVPS) removal"
on page
Go to step 4 Replace the LVPS.
See
power supply
(LVPS) removal"
on page
Diagnostic information
5060-00x
"Low voltage
4-38.
"Low voltage
4-38.
2-113