Sanyo PLC-XF30 - Audio System

-25-
ASS'Y MOTOR&AUDIO
SP-OFF
AUDIO-MUTE
2
5
3
7
10
IC001
AUDIO_AMP.
K16A
SLOT - SELECTIC9002
ASS'Y CGMOTHER
K90K
Terminal board
- Component
Terminal board
- DVI
IC801
IC1801
K8F
K8E
I/O EXPANDER
CPU
K16B
K16F
Audio system
ASS'Y_MAIN
Terminal board
- AV
13
3
Terminal board
-DSUB15
19
10
9
72
IC1851
14
AUDIO_CONTROL
SDA
SCL
IC1871
13
57
K90C
SLOT_1
AUDIO INPUT
L
R
33
122
K90D
SLOT_2
AUDIO INPUT
L
R
33
122
K90E
SLOT_3
AUDIO INPUT
L
R
33
122
K90F
SLOT_4
AUDIO INPUT
L
R
33
122
L
R
MONITOR OUT
K38E
ASS'Y_RS232C
K38F
L-OUT
R-OUT
L
R
L
R
L
R
L
R
L
R
The terminal D-SUB15 and the SLOT-4 K90F do not exist
in some particular models.
K80H
K10H
K3101
K71H
No sound
Troubleshooting
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.
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).
-24-
9V
16V
6.25V
DELAY
ABNORMAL
VOL. DET.
LATCH
START
LOGIC
OC-RC
OSC
CONTROL
REF
OSC
3
2
1
ABNORMAL
TEMP. DET.
PC612
PC611
D652
D651
IC652
D655
T621
6
5
43
2
1
6
5
43
2
1
1
2
3
PROTECTION
89152
1
14
12
10456
11
7
Vcc
FET
FET
CONT
G (L)
G (H)
OUT
Vin
VOLTAGE CONTROL
ABNORMAL VOLTAGE DETECT
-6V
<FF>
STR-Z2156
Switching regulator
* NO POWER-2
Troubleshooting
IC632
If a temperature of this
frame reaches to 150˚C,
the IC632 will be shut
down.
If this Vcc voltage reaches to
abnormal voltage (exceeds
22V), the IC632 will be shut
down.
If this voltage reaches to
abnormal voltage (exceeds
6.8V), the IC632 will be shut
down.
Timing chart
Pin 4
OSC OUT
Pin 2
Pin 10
Check the signal at pin 5
of T621. (Switching power
IC output signal.)
Caution : "HOT" Circuit !
5
CHECK !
Check the switching regulator.