Ac And Dc Power Service Check - Lexmark 13P0150 - C 750dtn Color Laser Printer Service Manual

AC and DC Power Service Check

Before proceeding with this service check remove or disconnect any options that may be
installed. Turn the machine on. If it operates correctly, reattach one option at a time until
the failing option is located.
Note: Before proceeding with this service check turn the printer on and check to see if
the Power ON LED on the Engine board is turned on.
Step Actions and Questions
1
Is the LED turned on?
AC Power Service Check
The printer appears to be inoperative when turned on with the Power ON/Status LED Off,
the LCD display is blank, the Fuser lamps do not come on and no motors turn.
Step Actions and Questions
1
Main AC Power - Check to make sure the printer is
receiving main AC power.
Is the printer receiving AC power?
2
AC Power Check (Wall Outlet) - Check the AC line voltage
at the AC outlet.
Is the AC line voltage correct?
3
AC Power Cord
Is the power cord in good condition and correctly installed?
4
AC Power Check (AC Line Cord) - Check the AC line
voltage at the end of the AC line cord.
Is the AC line voltage correct?
5
Low Voltage Power Supply - Turn the power off and
Disconnect the LVPS from the RIP and Engine Boards.
Check for +5 V dc on the LVPS cables. Engine Board
+5 V dc: J9-2 and J9-3. RIP Board +5 V dc: J23-13,
J23-14, and J23-15.
Is there approximately +5 V dc on any of these connector
pins?
2-50
Service Manual
5060-XXX
Yes
Go to the
Power
Service
Check" on
page 2-50
Yes
Go to Step 2
Go to Step 3
Go to Step 4
Go to Step 5
Go to the
Power
Service
Check" on
page 2-51
No
"AC Go to the "DC
Power
Service
Check" on
page 2-51
No
Inform the
customer that
AC power to
the printer is
incorrect.
Inform the
customer that
the AC line
voltage is
incorrect.
If the cord is in
poor
condition,
replace the
cord.
Replace the
Line Cord
"DC Replace the
"LVPS" on
page 4-14