Canon PIXMA MP170, Service Manual

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2-2. MP450 Operation Panel Board L
J1 (Logic board)
J2 (LCD)
J3 (Operation board R)
No. Signal name Function
1 3.3V +3.3V
2 5V +5.5V
3 VSEN Sensor power supply
4 SNS_HPS Scanner HPS
5 POWER_SW Power button
6 STOP_SW Stop/Reset button
7 POW_LED Power LED output
8 ERR_LED Alarm LED output
9 PANEL_RSTX Reset signal
10 PANEL_INTX Interrupt signal
11 SD_CMD Command data switch
12 to 15 SD_D0to D3 Data signal
17 SD_CLK Clock signal
16, 18 GND Ground
No. Signal name Function
1 LED_SHDNX LED illumination control
2 LED_PWR LED power supply
3 VDD +3.3V
4 Vss Ground
4 LED_Vss Ground
6 to 13 DB0 to 7 Data signal
14 RDB Data read
15 WDB Data write
16 RS0 Register select
17 RSTB Reset signal
18 CS1B Chip select
No. Signal name Function
1 to 4 RA4 to 7 Key scan row address
5 to 7 CA4 to 6 Key scan column address
8 SW_STP Stop/Reset button signal
9 HPS Scanner HPS
10 VSEN Sensor power supply
11 GND Ground
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