Audio System - Sanyo PLC-EF30 Service Manual

No sound
Terminal board
- DVI
L 33
R 122
K80H
Terminal board
- Component
L 33
R 122
K10H
Terminal board
- AV
L 33
R 122
K3101
Terminal board
-DSUB15
L 33
R 122
K71H
The terminal D-SUB15 and the SLOT-4 K90F do not exist
in some particular models.
Terminal board DVI, Component, AV and D-SUB15.
1. Check that the R and L signals are correct.
Pins122(R) and 33(L).
K80H, K10H, K3101 and K71H.
Terminal board DSUB15 does not exist in some particular models.
assembly CG-Mother
1. Check that the R and L signals are correct.
Pins 3(R) and 13(L) of IC9002.
Troubleshooting
ASS'Y CGMOTHER
SLOT_1
K90C
SLOT_2
K90D
K90K
L
13
R
3
SLOT_3
K90E
SLOT_4
K90F
ASS'Y_MAIN
IC1871
AUDIO_CONTROL
L 5 7
L
2 7
R 3 1
R
19 14
CPU
SDA 9
SCL 10
IC801
IC1851
AUDIO-MUTE
IC1801
SP-OFF
I/O EXPANDER
Assembly Main
1. Check that the Vcc-voltages are correct.
2. Check that the R and L input signals are correct.
Pins 2 and 19 of IC1851
3. Check that the IC1851 output signals are correct.
Pins 7(L) and 14(R).
4. Check that the audio output signals are correct.
Pins 7(L) and 1(R) of IC1871.
5. Check that the AUDIO MUTE signal is correct.
6. Check that the SP-OFF signal is correct.
7. Check that the SDA-signal is correct. Pin 9 of IC1851.
8. Check that the SCL-signal is correct. Pin10 of IC1851.
Assembly Motor audio
1. Check that the Vcc-voltages are correct.
2. Check that the R and L input signals are correct.
Pins 2(R) and 5(L) of IC001
3. Check that the AUDIO MUTE signal is correct.
4. Check that the SP-OFF signal is correct.
5. Check that the IC001 output signals are correct.
Pins 10(L) and 7(R).
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Audio system

ASS'Y_RS232C
L
R
K38F K38E
AUDIO_AMP.
K16B
L
2 10 L-OUT
R
5
7 R-OUT
IC001
K16F
3
K16A
ASS'Y MOTOR&AUDIO
L
R