Troubleshooting - Pioneer KEX-M9527ZT/UC Service Manual

1

7.1.3 TROUBLESHOOTING

Is B-UP ON?
NO
BSENS terminal
Pin 75(IC601)
YES
Is ACC ON?
A
NO
ASENS terminal
Pin 73(IC601)
YES
Does illumination
NO
come on?
YES
Is PWR-ON enabled?
NO
YES
Is voice output?
NO
YES
B
Is VOL adjustment
NO
enabled?
YES
C
Normal operation
D
50
1
2
Check +B
(Check a power supply.)
Turn on ACC
(Check a power supply.)
Check illumination circuit?
ILSENS terminal Pin 2(IC601)
Check PWRSW terminal
power Pin 69(IC601)
Is amplifier connected
YES
correctly?
NO
Connect amp correctly
Check encoder input.
ENC1+ Pin 65(IC601)
KEX-M9527ZT/UC
2
3
Is any sound of FM, AM and
TAPE (internal sources) output?
YES
Are FM and AM
NO
sounds output?
YES
NO
Is TAPE sound output?
YES
NO
IsTAPE mechanical unit
operated normally?
YES
Check the following terminals
SYSPW Pin1(IC601)
3
4
Check the following terminals
NO
SYSPW Pin 1(IC601)
sysmute2 Pin 5(IC601)
sysmute1 Pin 6(IC601)
Check the following terminals
FMPW Pin 43(IC601)
AMPW Pin 44(IC601)
Recheck hardware
Check the following terminals
STBY Pin 85(IC601)
CM Pin 89(IC601)
SC1 Pin 88(IC601)
SC2 Pin 87(IC601)
4