Part 4: Troubleshooting
4-10
2.5 Sub CPU (IC1882, PIC12F675)
1
VDD
Power 5V
-
2
GP5/T1CKI
TMR1_CLK
Clock Input
I
3
GP4
TXL
Power switch signal
Low Wattage = L
O
4
GP3
RXL
Lamp Status Signal
I
5
GP2/T0CKI
LAMP_PWM
APL Level Input
I
6
GP1
SCEL
Lamp ON/OFF Control
Lamp ON = L
O
7
GP0
LAMP_ERR
Lamp Error Output
Lamp Error = H
O
8
GND
-
-
Pin No.
Name
Function
I/O
2.6 Output Expander (IC1801, TC74LCX574FT)
1
OE
IO_ENB
I
2
D0
D0
I
3
D1
D1
I
4
D2
D2
I
5
D3
D3
I
6
D4
D4
I
7
D5
D5
I
8
D6
D6
I
9
D7
D7
I
10
GND
GND
-
11
CK
ADD1_CS
Output Port Chip Select
Enable = L
I
12
Q7
MUTE
Audio Mute Output
Mute = H
O
13
Q6
READY_LED
Ready LED
Ready = H
O
14
Q5
LAMP_LED
Lamp Replace LED
Replace = H
O
15
Q4
TEMP_LED
Warning Temperature LED
Warning = H
O
16
Q3
PWR_LED
AC Power LED
ON = H
O
17
Q2
KO3
KEY Scan Output
O
18
Q1
KO2
KEY Scan Output
O
19
Q0
KO1
KEY Scan Output
O
20
Vdd
Power 3.3V
-
Pin No.
Name
Function
I/O
2.7 Output Expander (IC1802, TC74LCX574FT)
1
OE
IO_ENB
I
2
D0
D0
I
3
D1
D1
I
4
D2
D2
I
5
D3
D3
I
6
D4
D4
I
7
D5
D5
I
8
D6
D6
I
9
D7
D7
I
10
GND
GND
-
11
CK
ADD1_CS
Output Port Chip Select
Enable = L
I
12
Q7
ON_3.3V
3.3V OFF at standby mode
O
13
Q6
TURBO_C
Strobe for Turbo (IC9401)
O
14
Q5
SH_B_ST
Strobe for B sample & hold (IC501)
O
15
Q4
SH_G_ST
Strobe for G sample & hold (IC531)
O
16
Q3
SH_R_ST
Strobe for R sample & hold (IC561)
O
17
Q2
IRM_RS
Reset for IC401
O
18
Q1
MCLK_SW
Switch for MCLK
O
19
Q0
FAN_SW
Switch for FAN
O
20
Vdd
Power 3.3V
-
Pin No.
Name
Function
I/O
Содержание LV-S3E/D78-5423
Страница 2: ...CANON Multimedia Projector LV S3U D78 5422 LV S3E D78 5423 SERVICE SMANUAL ...
Страница 9: ...Part 1 General Information ...
Страница 24: ...Part 2 Repair Information ...
Страница 42: ...Part 3 Adjustment ...
Страница 59: ...Part 4 Troubleshooting ...
Страница 73: ...Part 4 Troubleshooting 4 14 BA7078AF Sync Detector IC5301 BA9743AFV DC DC Converter IC371 ...
Страница 74: ...Part 4 Troubleshooting 4 15 LM4865 Audio Amplifier IC5003 PW168A Scaler Main CPU IC301 ...
Страница 75: ...Part 4 Troubleshooting 4 16 TA1370FG Sync Separator Frequency Counter IC5302 VPC3230D Video Decoder IC101 ...
Страница 76: ...Part 5 Parts Catalog ...
Страница 77: ......
Страница 93: ...Part 6 Electrical Diagrams ...