-38-
Troubleshooting
CG/AV
SUDIO
SW
IC5001
AV BOARD
AV SUB BOARD
MAIN COMP.-A BOARD
MAIN COMP.-B BOARD
MAIN COMP.-C BOARD
POWER BOARD
Q5007
SP901
SPEAKER
L
R
15
4
2
3
39
3
2
4
4
3
195
279
2
4
18
16
8
2
10,11
1
13
2
12
14
Q5008
AUDIO
AV/CG-SW
A
V/CG-SW
Q1901
AUDIO
OUTPUT
IC001
SYSTEM
CONTROL
&
SCAN CONV.
IC301
SUB CPU
IC1901
A
UDIO IN
CG L
CG R
AV L
AV R
DAC
IC431
I/O
EXPANDER
IC1904
SCLK
PORTB0
PORTB1
VOL
AUDIO
MUTE
SDAT
M_SCL
M_SDA
BUFFER
IC809
1. Check that sound volume control signal is correct.
Pin 4 of IC001
2. Check that audio signal is observed at pin 2 of
IC001.
3. Check the MUTE signal at pin 3 of IC001.
Pin 3 of IC001 ......................................MUTE On: H
4. Check that Vcc-v12V) is applied at pins 1
and 9 of IC001.
POWER BOARD
1. Check that the Vcc-v9V) is applied at pins 3-
6 of K3802.
2. Check that the AV/CG switching signal is correct.
Pin 9, 10 of IC5001 ........................................ AV : L
CG : H
3. Check that audio signal is observed at following
points.
Pins 9-10 of K3802, pins 11-14 of K3801
1. Check that the AV/CG switching signal is correct.
Pin 4 of IC1904 .............................................. AV : L
CG : H
2. Check that the MUTE signal is correct.
Pin 39 of IC1901 ..................................MUTE On: H
1. Check that sound volume control signal is correct.
Pin 4 of IC431
MAIN COMP-C BOARD
MAIN COMP-B BOARD
AV, AV SUB BOARD
NO SOUND
Содержание PLC-XU22B
Страница 44: ... 43 TPDVS V SYNC TPDHS H SYNC TP2571 NRS ...
Страница 48: ... 47 IC Block Diagrams CXA2111R LCD Driver IC401 CXA2112R Sample Hold IC501 IC531 IC561 IC6501 IC6531 IC6551 ...
Страница 49: ... 48 IC Block Diagrams CXD3503R White Uniformity Compensation IC471 FA5331M Power Factor Control IC01 ...
Страница 50: ... 49 IC Block Diagrams IDT71V016S RAM IC805 LA7217M Sync Separator IC6131 ...
Страница 51: ... 50 IC Block Diagrams LB1641 Motor Drive IC5501 IC5551 LC4105V Buffer IC2501 IC2521 IC2541 ...
Страница 52: ... 51 IC Block Diagrams M62358FP DAC IC431 MB40988PFQ D A COnverter IC2200 ...
Страница 53: ... 52 IC Block Diagrams MC14538BF IC7201 MPC948FA Clock Driver IC1302 ...
Страница 54: ... 53 IC Block Diagrams PW264 System Control Scan Converter IC301 STR Z2156 Power SWitching Control IC631 ...
Страница 57: ... 56 TDA9178T Picture Improvement IC121 IC Block Diagrams ...
Страница 83: ...Mechanical Parts List 82 CHASSIS PARTS 24 24 24 72 73 71 57 45 45 45 46 46 46 46 51 51 51 ...
Страница 84: ... 83 Mechanical Parts List 32 59 33 58 25 34 28 60 27 45 45 45 45 45 45 ...
Страница 87: ... 86 ...
Страница 88: ... 87 ...
Страница 89: ...Mar 2000 1300 SI Printed in Japan SANYO Electric Co Ltd ...