Canon LV-S4, Service Manual

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Control Port Functions
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_ST 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
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Output Expander (IC1802, TC74LCX574FT) Port Functions
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 MUTE SW SP MUTE = H 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
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Input Expander (IC1811, TC74LCX541FT) Port Functions
* Following information differs from the model LV-S3 ;
- pin 9 of IC1811