Minolta DI450, Service Manual, Page: 238 / 271

T-47
(9) C0400: Exposure Lamp’s failure to turn ON
C0420: Exposure Lamp turning ON at abnormal timing
C0400, C0420
Relevant Electrical Parts
Exposure Lamp (FL51)
Inverter Board (UN51)
Lamp Flat Cable (PWB-IF) Image Processing Board (PWB-B)
Power Supply Board (PWB-C)
SCP Board (PWB-IC)
Step Check Result Action
1 Exposure Lamp has discolored. YES Change Exposure Lamp.
2 “NG” is displayed when “Scanning Check” of
“Function (IR)” is run. YES Check the optical path.
Change Image Process-
ing Board or CCD Board.
3 Power Supply Board operation: the voltage
across PJ9C-4 on Power Supply Board and
GND is DC24V after the malfunction has been
reset. YES Check and change, as
necessary, flat cable.
Change Inverter Board or
Image Processing Board.
NO Change Power Supply
Board.
FL51
UN51
CN2UN51-1
CN2UN51-2
F1
CN1UN51-1
CN1UN51-2
CN1UN51-3
PJ1IF-4
PJ1IF-3
PJ1IF-2
PJ1IF-1
PWB-IF
PJ2IF-4(ON-OFF)
PJ2IF-3(DC24V)
PJ2IF-2(GND)
PJ2IF-1(GND)
PWB-B
PJ5B-1(ON-OFF)
PJ301B-14(GND)
PJ301B-15(DC24V)
PWB-C
PJ9C-3(GND)
PJ9C-4(DC24V)
PWB-IC
PJ1IC-3(DC24V)
PJ1IC-4(GND)
4002C26TAA