Troubleshooting - Pioneer KEX-M8806ZT/EW Service Manual

7.1.3 TROUBLESHOOTING

Is B-UP ON?
NO
BSENS terminal
Pin 75(IC601)
YES
Is ACC ON?
NO
ASENS terminal
Pin 73(IC601)
YES
Does illumination
NO
come on?
YES
Is PWR-ON enabled?
NO
YES
Is voice output?
NO
YES
Is VOL adjustment
NO
enabled?
YES
Normal operation
KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91
Check +B
(Check a power supply.)
Turn on ACC
(Check a power supply.)
Check illumination circuit?
ILSENS terminal Pin 23(IC601)
DSSILL terminal Pin 51(IC601)
Check PWRSW terminal
POWER Pin 55(IC601)
Is amplifier connected
correctly?
NO
Connect amp correctly
Check encoder input.
ENC1+ Pin 53(IC601)
ENC1- Pin 54(IC601)
Is any sound of FM, AM and
YES
TAPE (internal sources) output?
YES
Are FM and AM
sounds output?
YES
Is TAPE sound output?
YES
IsTAPE mechanical unit
operated normally?
YES
Check the following terminals
SYSPW Pin 52(IC601)
Check the following terminals
NO
SYSPW Pin 52(IC601)
AMPPW Pin 100(IC601)
SYSMUTE Pin 50(IC601)
MUTE Pin 49(IC601)
Check the following terminals
NO
FMPW Pin 43(IC601)
AMPW Pin 44(IC601)
NO
Recheck hardware
NO
Check the following terminals
STBY Pin 85(IC601)
CM Pin 84(IC601)
SC1 Pin 83(IC601)
SC2 Pin 82(IC601)
51