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1.2 No Sound
1) Main board
1. Check that the PC/AV switching signal is correct.
Pins 10 and 11 of IC5001 ...................AV : L, PC : H
2. Check that audio signal is observed at following points.
Pins 11-12(PC)/13-14(AV) of K10B/K50B
3. Check that the MUTE signal is correct.
Pin 5 of K5A .......................................Mute-On: H
4. Check that the MUTE signal is correct.
Pin 12 of IC1803 ................................Mute-On: L
5. Check that the PC/AV switching signal is correct.
Pin 16 of IC1804 ................................AV : L, PC : H
2) Audio board
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.
Part 4: Troubleshooting
4-6
Fig. 4-2
PC/AV
AUDIO
SW
IC5001
AV BOARD
AUDIO BOARD
MAIN BOARD
Q5007
SP901
SPEAKER
L
R
15
3
2
4
16
12
16
13
12
16
14
4
12
4
6
8
1
3
2
8
10,11
1
13
2
12
14
Q5008
PC/AV-SW
Q1801
AUDIO
OUTPUT
IC001
BUFFER
IC851
DAC
IC431
I/O
EXPAND
.
IC1804
I/O
EXPAND
.
IC1803
I/O
EXPAND
.
IC1806
SYSTEM
CONTROL
&
SCAN CONV.
IC301
A
U
D
IO
I
N
A
U
D
IO
O
U
T
PC L
PC R
AV L
AV R
L
R
VOL
AUDIO
DAC
SDATA
SCLK
DAC
SDATA
SCLK
MUTE
MUTE
Q5041
Q5001
Q5003
Q5002
Q5004
Q5042
BUS
Содержание LV-7105
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Страница 3: ...CANON Multimedia Projector LV 7105U D78 5132 LV 7105E D78 5133 SERVICE SMANUAL...
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Страница 11: ...Part 1 General Information...
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Страница 33: ...Part 2 Repair Information...
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Страница 55: ...Part 3 Adjustment...
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Страница 77: ...Part 4 Troubleshooting...
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Страница 81: ...Memo Part 4 Troubleshooting 4 3...
Страница 91: ...Part 4 Troubleshooting 4 13 TP561 S H B INTPUT TP571 TP1571 S H B OUTPUT TP505B TP506B S H B OUTPUT...
Страница 92: ...Part 4 Troubleshooting 4 14 4 IC BLOCK DIAGRAMS FA5332M Power Factor Control IC01 AN5265 AUDIO OUTPUT IC001...
Страница 93: ...Part 4 Troubleshooting 4 15 PW164 10RK System Control Scan Converter IC301 CXA2111R LCD Driver IC401...
Страница 94: ...Part 4 Troubleshooting 4 16 M62358FP DAC IC431 CXD3503R White Uniformity Compensation IC471...
Страница 96: ...Part 4 Troubleshooting 4 18 IDT71V016S RAM IC811 CXA2016S Sync Separator IC1021...
Страница 97: ...Part 4 Troubleshooting 4 19 MC10H351ML IC1501 LM76CHMX Thermal Sensor IC1831 IC1832...
Страница 99: ...Part 4 Troubleshooting 4 21 TC4053BF Switching IC5001 SAA7114H Digital Video Processor IC5101...
Страница 100: ...Part 4 Troubleshooting 4 22...
Страница 101: ...Part 5 Parts Catalog...
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Страница 103: ...PARTS CATALOG Multimedia Projector LV 7105U REF NO D71 5132 LV 7105E D71 5133 Power Projector LV 7105J D71 5131...
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Страница 113: ...U 1 U 2 V 1 V 2 W 1 X 1 Z Page 5 CANON LV 7105J REF No D78 5131 LV 7105U D78 5132 LV 7105E D78 5133...
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Страница 118: ...Part 6 Electrical Diagrams...
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