Clarion PP-2898H-C - Troubleshooting

PP-2898H-C,F
- 3 -
TROUBLESHOOTING
No Power
Check Voltage
ACC/BU line
OK
NG
Check Display
of LCD
Defective IC201,601
and around circuit
Defective
Q415,Q205 of ACC line
or IC401 of VDD+5V
Defective IC601,201
or A connection of
a communication line
of both ICs
NG
Push
an operation key
and can operate it?
OK
OK
NG
Check power suply line,
SYS+5V : Q404
SYS+9V : Q401
SUS+12V :Q402
CD+8V : Q410
CD+5V : Q408
or communication line
of IC601,201
No operating the key
Check
contact of
the switch
OK
OK
NG
Confirm
KI1-4, KS1-4 line of
SW PWB
Malfuntion of switch
Malfuntion of soldering
parts of Switch PWB
NG
Defective IC601
No Power
No sound AM/FM section
Stop
in SEEK operating
OK
OK
NG
Check
power suply pin7,9,17
of BL101
Defective of IC301
Defective BL101 Tuner
or IC201
Defective
Q108 ,109 or 401
NG
OK
Check
audio signal wave
NG
Defective BL101 Tuner
No sound AM/FM section
No Sound
Check
Muting curcuit
OK
NG
Check
power supply line
of IC301
Defective IC402
and around circuit
Defective IC201
Defective Q401
of SYS+9V line
or VOL-DATA line
NG
Push
an operation key
and can operate it?
OK
OK
NG
Defective IC201
No Sound
Check
input signal wave
Pin11,12,14,15
of IC402
OK
NG
Defective IC301,
IC501 - 505
No sound CD section
OK
OK
NG
A wave appear
on a communication line
from IC201
Defective of IC301
Defective
CD+8V : Q410
CD+5V : Q408
Defective
CD Mechanisum
NG
OK
Check
audio signal wave
pin4,6of J201
NG
Defective Flat wire
816-4022-50
No sound AM/FM section
Check
power suply pin7,25
of J201