16
4
6
25
3
11
1
14
44
48
4
5
6
48
E
F
GO TO
YES
CHECK FOR SIGNAL
AT IC501 #6
NO
NO SOUND
GO TO
E
F
LC501
LA7674
VOL-UP
DOWN
CONTROL
KEY
SOUND VOLUME
MAX: ~7V
DC
MIN: ~1V
DC
CHECK
CONNECTOR
P601
IC701
LC864616A
CHECK
9V
DC
LINE
LOW PASS
FILTER
I601
KA2201
SP01
SPEAKER
DISCONNECT LOAD
CHECK FOR SND,
PWM SIGNAL, IF
MISSING REPLACE
IC 701
SOUND TAKEOFF
NO OUTPUT:
CHANGE IC501
DE EMPHASIS
CHECK
FM DET
CIRCUIT
CHECK
#6 Vcc
about 12V
Z102
IC501
LA7674
SOUND
IF INPUT
Z202
IF 4 ISOK
& NO OUTPUT
THEN
CHANGE EC501
