Canon LV-7105 Service Manual - Page 88

IC Ref. No, Pin/Name I/O, Signal Name, Function

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Part 4: Troubleshooting IC Ref. No IC1806 IC1807 IC1808 Pin/Name I/O 12 O 13 O 14 O 15 O 16 O 17 O 18 O 19 O 12 O 13 O 14 O 15 O 16 O 17 O 18 O 19 O 2 I 3 I 4 I 5 I 6 I Signal Name SCLK SDATA DAC_STLOBE S&H_STLOBE IRM_STLOBE FAN_CONT2 FAN_CONT1 Not used Not used DVS2 LAMP_ON LIM-OFF Not used Not used CTS33 480I_SW KI1 KI2 KI3 KI4 Power_fail 7 I Not used 8 I Lamp_ERR 9 I Not used IC1809 2 I S_IN 3 I CB_SW 4 I CR_SW 5 I CTS/V 6 I 7 I 8 I 9 I Function 3-Line Serial Clock 3-Line Serial Data DAC S&H White Uniformity Fan Speed Control 2 Fan Speed Control 1 Note Data Effective: Low Data Effective: High Data Effective: Low Fan Control ON: High Fan Control ON: High Vsync x 2Hz Output Output Clock ON/OFF Output Clock ON: High RS232C Relation Main Key Switch Main Key Switch Main Key Switch Main Key Switch Power Fail Detection 1080i/1035i/720p:Low,others to High Abnormal: Low Normal: High Lamp Fail Abnormal: High Normal: Low S-Input Detection Component-Input Detection Component-Input Detection S-Input: Low, others to High C-Input: Low, others to High C-Input: Low, others to High OEM Option OEM Option OEM Option OEM Option 4-10

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IC Ref. No
Pin/Name I/O
Signal Name
Function
Note
IC1806
12
O
SCLK
3-Line Serial Clock
13
O
SDATA
3-Line Serial Data
14
O
DAC_STLOBE
DAC
Data Effective: Low
15
O
S&H_STLOBE
S&H
Data Effective: High
16
O
IRM_STLOBE
White Uniformity
Data Effective: Low
17
O
FAN_CONT2
Fan Speed Control 2
Fan Control ON: High
18
O
FAN_CONT1
Fan Speed Control 1
Fan Control ON: High
19
O
Not used
IC1807
12
O
Not used
13
O
DVS2
Vsync x 2Hz Output
14
O
LAMP_ON
Output Clock ON/OFF
Output Clock ON: High
15
O
LIM-OFF
16
O
Not used
17
O
Not used
18
O
CTS33
RS232C Relation
19
O
480I_SW
1080i/1035i/720p:Low,others to High
IC1808
2
I
KI1
Main Key Switch
3
I
KI2
Main Key Switch
4
I
KI3
Main Key Switch
5
I
KI4
Main Key Switch
6
I
Power_fail
Power Fail Detection
Abnormal: Low
Normal: High
7
I
Not used
8
I
Lamp_ERR
Lamp Fail
Abnormal: High
Normal: Low
9
I
Not used
IC1809
2
I
S_IN
S-Input Detection
S-Input: Low, others to High
3
I
CB_SW
Component-Input Detection
C-Input: Low, others to High
4
I
CR_SW
Component-Input Detection
C-Input: Low, others to High
5
I
CTS/V
6
I
OEM Option
7
I
OEM Option
8
I
OEM Option
9
I
OEM Option
Part 4: Troubleshooting
4-10