Service manual

QMS 3260/4032 Laser Printer - Base Engine Technical Manual 4-3
Release Version 11-97
Primary Fault Isolation Procedures
4.1 Inoperative Printer
When you switch on the printer, the Control Panel LEDs do not light, the LCD remains blank, the Fuser Fan
does not rotate, and the printer does not go into warm-up.
Step Actions and Questions Yes No
SUSPECT COMPONENTS
The followin
g
components are associated with this specific
problem. One or more of these components ma
y
have failed
partiall
y
or completel
y
. If
y
ou cannot isolate the problem usin
g
this FIP, replace each component listed below, one at a time,
until the problem disappears.
• AC Drive PWB (RRP 9.3)
• Fuser Assembly (RRP 6.1)
• HVPS Assembly (RRP 9.4)
• Main Drive Assembly (RRP 8.1)
• ROS Assembly (RRP 5.1)
• wiring and connectors linking the components
1
AC POWER CORD INSPECTION
Inspect the AC Power Cord.
Is the AC Power Cord plugged into the back of the printer,
and is the other end plugged into an AC wall outlet?
Go to step 2 Plug the AC
Power Cord
into the printer
and into an
AC wall outlet
2
AC POWER CHECK
Check the voltage at the AC wall outlet.
Is there approximately 110VAC (or 220VAC if the printer is
the 220VAC model) at the AC wall outlet?
Go to step 3 Troubleshoot
the AC power
at the wall
outlet
3
QMS Video Controller CHECK
1. Switch off the Main Switch.
2. Remove the QMS Video Controller (RRP 9.8).
3. Switch on the Main Switch.
Do the Control Panel LEDs light up and does the printer
go into warm-up?
Replace the
QMS Video
Controller with
a new one
(RRP 9.8)
Go to step 4
4
LVPS +5VDC CHECK
1. Remove the Rear Cover (RRP 1.3)
2. Measure the voltage between J400-7 and FG, and
between J400-8 and FG on the MCU PWB.
Is there +5VDC between J400-7 and FG, and is there
+5VDC between J400-8 and FG.
Go to step 5 Go to step 6