Sanyo PLC-XP30 User Manual page 22

NO SOUND
R L
PC IN 1
12 1
PC IN 2
14 5
15 2
AV IN
IC5001
AUDIO SELECT SW
Truth table
SW-1 H
SW-2 H
-----------------------------------
ASS'Y AV
1. Check that the Vcc-voltage( +9V) is correct.
2. Check that the AV/PC1/PC2 select signals are correct.
Pin9, 10 of IC5001
AV
PC2
PC1
3. Check the input and output signals at IC5001.
4. Check the input and output signals at Q5016/Q5021.
ASS'Y AV
K10T
6
MUTE
K10S
15,16
IICSDA
17,18
IICSCL
R
21,22
Q5016
13
L
25,26
3 Q5021
SW-1
9
10 SW-2
K10Q
L H L
MUTE
35.36
H L L
AV PC2 PC1
SW-1 39.40
SW-2 41.42
K10R
IICSDA
25.26
IICSCL
27.28
Pin9 Pin10
L H
H L
L H
K11A
6
MUTE
IICSCL
IICSDA
K11B
15,16
IICSDA
17,18
IICSCL
Volume control
R R
21,22 15
IC1652
L L
25,26 2
3
MUTE
12
VOLUME
K8B
35.36 MUTE
39.40 SW-1
SW-1
SW-2
41.42
SW-2
MUTE
K8A
25.26 IICSDA
27.28 IICSCL
ASS'Y Video
1. Check that the Vcc-voltage( 12V) is correct.
2. Check the input and output signals at IC1652.
3. Check that the AUDIO MUTE signal is correct.
4. Check that the VOLUME signal is correct.
5. Check the input and output signals at IC1651.
6. Check the signal at Pin3 of IC2141. (IICSDA)
7. Check the signal at Pin2 of IC2141. (IICSCL)
ASS'Y Main
1. Check that the Vcc-voltages are correct.
2. Check that the AV/PC1/PC2 select signals are correct.
Pin4, 5 of IC1801
3. Check that the AUDIO MUTE signal is correct.
4. Check the signal at Pin30 of IC801. (IICSDA)
5. Check the signal at Pin29 of IC801. (IICSCL)
-22-
ASS'Y VIDEO
2 IC2141
17
VOLUME
3
K11D
Power amp.
R
10 5 2
IC1651
L
7 8 11
ASS'Y MAIN
Address
Address
4 35~37
7~9
Data
5 38~45 83~92
Data
49
IC1801
I/O EXP.
29
IICSCL
IC801
30
IICSDA
CPU
Pin4 Pin5
AV L H
PC2 H L
PC1 L H
2
4
TO_SP.