Minolta magicolor 330 Service Manual page 95

4.1 - Inoperative Printer, continued
Step
7
CONTROLLER PWB CHECK
1. Switch off the Main Switch.
2. Remove the Controller PWB (RRP 9.129).
3. Switch on the Main Switch.
Does the printer go into warm-up?
8
Replace the MCU PWB (RRP 9.123)
Does the printer go into warm-up?
9
LVPS LOADING CHECK
1. Disconnect P35 from the LVPS.
2. Measure the voltage between P33-3 on the LVPS and Frame
Ground, and between P32-11 on the LVPS and Frame Ground.
Is there +5VDC between P33-3 and Frame Ground, and is there
+24VDC between P32-11 and Frame Ground?
10
LVPS LOADING CHECK
1. Disconnect P32 and P33 from the LVPS.
2. Measure the voltage between P33-3 on the LVPS and Frame
Ground, and between P32-11 on the LVPS and Frame Ground.
Is there +5VDC between P33-3 and Frame Ground, and is there
+24VDC between P32-11 and Frame Ground?
11
MCU PWB LOADING CHECK
1. Reconnect P32 and P33 to the LVPS.
2. Refer to Section 12 Wiring Diagrams and one by one disconnect
components that are connected to the MCU PWB.
3. Measure the voltage between P33-3 on the LVPS and Frame
Ground, and between P32-11 on the LVPS and Frame Ground.
Do you eventually measure +5VDC between P33-3 and Frame
Ground, and +24VDC between P32-11 and Frame Ground?
magicolor 330 - Base Engine Service Manual
Actions and Questions
Primary Fault Isolation Procedures
Yes
Replace the Go to step 8
Controller
PWB (9.129)
with a new one
Problem solved Go to step 9
Replace the Go to step 10
Fuser Assem-
bly (RRP 9.80)
Go to step 11 Replace
LVPS
9.119)
Replace the Replace
component that MCU
loads down the (RRP 9.123)
LVPS.
No
the
(RRP
the
PWB
4-5