Pioneer SC-LX90 Service Manual page 100

5
Do the 10-ch indicator and LCD backlight light?
NG
Is 8-V power supply active?
Check Pin 1 of the CN6503 on the PERCH PS Assy.
NG
Failure in the
LCD8V power
supply
5
6
C
OK
OK
Failure in the DISPLAY
microcomputer or a
block of the front panel
SC-09TX
6
7
OK
Does the MCACC indicator light?
NG
Failure in the
block of the front
panel
Failure in the Assy that cannot be controlled
or poor connection between the uncontrollable
Assy and other Assy
7
8
A
B
C
OK
D
E
F
45
8