KX-HDV100RU, KX-HDV100RUB - Panasonic PBX Service Manual (repair manual). Page 7

7

LCD data are output from pin B9 of IC302 to LCD module.
LCD contrast is set by electronic control in LCD module.
+3.3V of the power supply voltage is pressurized about four/three times in the LCD module and used as LCD driving voltage
(approx. 10V).
The driving voltage is observed at pin 12(VLCDIN) of CN2.

Reset Signal is output from IC301 and input into IC302-pin L12.

1

2

4

3

5

1

2

4

3

5

To Pin R1 (KEY_COL7) of IC302 

To Pin D13 (RF_SDATA_IN/SD D3) of IC302 

To Pin A9 (SPI2CK) of IC302 

To Pin B10 (SPI2DI) of IC302 

To Pin B9 (SPI2DO) of IC302 

C130 

C131

R116

C134

CN2

1

CS0

2

RST

3

CD

4

SCL

5

SI

6

VDD

7

VSS

8

VB0+

9

VB0-

10

VB1-

11

VB1+

12

VLCDIN

DGND

R135

DGND

3.3V

DGND

C132

C129

DGND

R142

R141

R140

R139

L106

R137   

L108

L110

L111

C136

DGND

DGND

C137

To LCD

R305

DGND

C326

C327

VDD3.3V

DGND

IC301

1

VSS

2

VDD

3

CD

4

OUT

DC_POWER

PWR_RST

IC302

RSTN

L12

DGND

C328