Sanyo AAI-A Series Training Manual page 46

Trouble Shooting Chart Startpoint symptom: No sound-picture OK
(stereo
model)
v
Ilv
Check voltage on pin 3 of IC1l 02
*
Ov
IC701 , Q172, R175, R179
I
I
I
t
l!!!!-1
Yes
Check waveform on pin 1 of IC1 102
* Check audio output circuit
IC1102, Headphone, speakers
Check waveform on pin 3 of IC1l 03
w
No
Check IC1l 03 peripheral circuit
X1171, C1171, C1173, C1187,
C1191, C1188, C1189
+
l.!!!!d
Y es
Check waveform on pin 1 of IC101 - C1179, R1183, C1183
I
I
No
t
P!!!!-l
0.3V
Yes
Check waveform on pin 5 of IC101
* IC101, C122, C123, C138, R125
Check waveform on pin 14 of
L
!!!!!-l
0.3V
No
1+
SIF
circuit peripheral circuit
I IC181
Q102, R108, C182, X180,
I IC181, c188, C186, T181, T181
I
1
Yes
I 4
Ch~ck SIF filterina c ircuit
No sound on 4.5 MHz------ Check Q112, Q152, X151, Q153, Q157 peripheral circuit
No sound on 5.5 MHz------ Check Qll 3, Q1 54, Xl 52 peripheral circuit
No sound on 6. OMHZ------ Check Qll 3, Q1 55, Xl 53 peripheral circuit
No sound on 6.5 MHz------ Check Q113, Q156, X154 peripheral circuit
All of systems ---------------- Check Q153, Q157, Q182, R128, C141, C142 peripheral circuit,
RB701 , IC701
An
.
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