13
4
6
30
11
1
14
44
48
4
48
E
F
GO TO
YES
CHECK FOR SIGNAL
AT I501 #6
NO
NO SOUND
GO TO
E
F
I501
LA7674
VOL-UP
DOWN
CONTROL
KEY
SOUND VOLUME
MAX: ~7V
DC
MIN: ~1V
DC
CHECK
CONNECTOR
P601
I701
CHECK
9V
DC
LINE#11,14
LOW PASS
FILTER
Q602,Q603
AUDIO
OUT
T601
TSP1036
SP01
SPEAKER
Q601
AUDIO
AMP
DISCONNECT LOAD
CHECK FOR SND,
PWM SIGNAL, IF
MISSING REPLACE
I701
SOUND TAKEOFF
NO OUTPUT:
CHANGE I501
DE EMPHASIS
CHECK
FM DET.
CIRCUIT
CHECK
R601 &
123V LINE
X601
I501
LA7674
SOUND
IF INPUT
Z601
IF #4 IS OK
& NO OUTPUT
THEN
CHANGE I501
