Lexmark 4500-00 Series, Service Manual

Page: 110 / 246

2-80
Service Manual
4500
FRU Action
Operator panel
Controller card If none of the lights come on, make
sure the cable is properly connected
to the controller card.
• Check for +5 V dc at J2, pin 5
(E320/E322) or J18, pin 5
(E220/E321/E323). See
“RIP
controller (E320/E322 only) ” on
page 5-6
or page 5-7 for more
information.
• If these voltages are not correct,
replace the controller card.
• If these voltages are correct,
replace the operator panel.
If more than one light does not turn
on or an individual light stays on
solid during POST, replace the
operator panel.
Verify that the button(s) function
correctly. Check continuity between
pins 1 and 2 at the operator panel
card and cable connector while
pressing the button (or
Continue
E220/E321/E323).
Similarly, check continuity between
pins 1 and 6 while pressing
Cancel
(E220/E321/E323).
• If continuity is not present, replace
the operator panel.
If all lights are dim and operate
erratically during POST or all lights
come on and stay on solid during
POST, replace the following field
replaceable unit (FRUs) one at a
time in the order shown:
• Controller card
• Operator panel