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Part 4: Troubleshooting
4-11
2.8 Input Expander (IC1811, TC74LCX541FT)
1
OE1
IO_ENB 1
CS1 Enable = L (OE1 and OE2)
I
2
A1
K11
KEY Scan Input
I
3
A2
K12
KEY Scan Input
I
4
A3
K13
KEY Scan Input
I
5
A4
OPTION1
Option Resistor 1
I
6
A5
OPTION2
Option Resistor 2
I
7
A6
OPTION3
Option Resistor 3
I
8
A7
LAMP_ERR
Lamp Error Input
I
9
A8
S_SW
S-video Detection
I
10
GND
GND
-
11
Y8
D7
O
12
Y7
D6
O
13
Y6
D5
O
14
Y5
D4
O
15
Y4
D3
O
16
Y3
D2
O
17
Y2
D1
O
18
Y1
D0
O
19
OE2
IO_ENB 2
Enable = L (OE1 and OE2)
I
20
Vdd
Power 3.3V
-
Pin No.
Name
Function
I/O
Summary of Contents for LV-S3E/D78-5423
Page 2: ...CANON Multimedia Projector LV S3U D78 5422 LV S3E D78 5423 SERVICE SMANUAL ...
Page 9: ...Part 1 General Information ...
Page 24: ...Part 2 Repair Information ...
Page 42: ...Part 3 Adjustment ...
Page 59: ...Part 4 Troubleshooting ...
Page 73: ...Part 4 Troubleshooting 4 14 BA7078AF Sync Detector IC5301 BA9743AFV DC DC Converter IC371 ...
Page 74: ...Part 4 Troubleshooting 4 15 LM4865 Audio Amplifier IC5003 PW168A Scaler Main CPU IC301 ...
Page 76: ...Part 5 Parts Catalog ...
Page 77: ......
Page 93: ...Part 6 Electrical Diagrams ...