Pioneer SC-LX90 Service Manual page 92

5
Identification of which part of the power system is in failure (1)
• Does the unit respond when the power cord is plugged in?
Identification of which part of the power system is in failure (2)
• Is the unit turned on by pressing the Power key on the front panel of the unit or
on the remote control unit?
NG
Is only the Power indicator
flashing?
Yes
Check whether the voltage
of the AC outlet is in the
decrease state or not.
Determination of whether the EVENT microcomputer
is in failure or poor connection
• Can the unit be turned on using a remote control unit
connected via the SR IN connector?
NG
Failure in the EVENT
microcomputer or the
IR 232C Assy
5
6
Not controllable (Unit's status)
The unit responds
ON/OFF repeatedly
Abnormality in the power
supply for the microcompu-
ter, or the unit in AC power
decrease status
No
OK
Poor connection in
the front block
SC-09TX
6
7
The unit does not respond
Abnormality in the power
supply or in the main
microcomputer
OK
B
7
8
A
B
C
D
E
F
37
8