KX-HDV330RUB - Panasonic Telephone Service Manual (repair manual). Page 7

7

LCD  display and touch panel datas are output from LCD I/F of IC101 to Color TFT LCD display module.
HDV330 has interface of 4-Wire Resistive Touch Panel(pin37,38,39,40).
This color TFT LCD is powered by  +3.3V (CN1 pin4 )and VLED+- (CN1 pin 1,2)voltage.
VLED+-(LED backlight  voltage ) is powered by IC306 block(constant  current circuit) with PWM control.
The PWM (Pulse Width Modulation) signal is output from IC101 (pin U13) pin and the brightness is changed according to its duty 
ratio.

LCD_EN

LCD_R[2]
LCD_R[3]
LCD_R[4]
LCD_R[5]
LCD_R[6]
LCD_R[7]
LCD_G[2]
LCD_G[3]
LCD_G[4]
LCD_G[5]
LCD_G[6]
LCD_G[7]
LCD_B[2]
LCD_B[3]
LCD_B[4]
LCD_B[5]

LCD_B[1]
LCD_B[6]
LCD_B[7]
LCD_R[1]

LCD_G[0]
LCD_G[1]
LCD_B[0]
LCD_R[0]

LCD_VSYNC
LCD_HSYNC

LCD_DE

LCD_PCLK

CL133

CL170
CL171

CL198

R161

1

2

3

4

5

6

7

8

R162

1

2

3

4

5

6

7

8

R163

1

2

3

4

5

6

7

8

R164

1

2

3

4

5

6

7

8

R165

1

2

3

4

5

6

7

8

R167

1

2

3

4

5

6

7

8

R168

R166
R169

R170

R171

CL132

R1021
R1022
R1023

R1028

R1001
R1002
R1003
R1004
R1005
R1006
R1007
R1008
R1009
R1010
R1011
R1012
R1013
R1014
R1015
R1016

R1017

PHY_RST

R1018
R1019
R1020

R1024

IC101

L4

MEMXD2/LCDD4

M1

MEMXD1/LCDD3

M4

MEMXD0/LCDD2

L1

MEMXD3/LCDD5

M2

MEMXD4/LCDD6

K2

MEMXD5/LCDD7

K1

MEMXD6/LCDD10

J2

MEMXD7/LCDD11

H1

MEMXD8/LCDD12

J1

MEMXD9/LCDD13

K3

MEMXD10/LCDD14

K4

MEMXD11/LCDD15

N1

MEMXD12/LCDD18

L2

MEMXD13/LCDD19

L3

MEMXD14/LCDD20

M3

MEMXD15/LCDD21

H4

MEMCS3/EXTINT7

H3

MEMCS2/EXTINT6

G4

MEMCS1/LPCLK

G3

MEMCS0/LCDD0

E4

MEMRD

J4

MEMWR

E1

MEMXA20_MEMRAS/LCDD16

F2

MEMXA19_MEMCAS/LCDD9

F1

MEMCKE/EXTINT13

G1

MEMCLK

D4

MEMXA16

F4

MEMXA15

D3

MEMXA14_BA1/LCDD8

D1

MEMXA13_BA0/LCDD1

G2

MEMXA12/EXTINT14

F3

MEMXA11/LCDGP8

C2

MEMXA10/LCDGP7

E2

MEMXA9/LCDGP6

E3

MEMXA8/LCDGP5

D2

MEMXA7/LCDGP4

C1

MEMXA6/LCDGP3

C3

MEMXA5/LCDGP2

B2

MEMXA4/LCDGP1

A3

MEMXA3/LCDGP0

A2

MEMXA2/EXTINT4

B3

MEMXA1/LCDD23

B1

MEMXA0/LCDD22

H2

MEMDQMBLS0/LCDD17

J3

MEMDQMBLS1/EXTINT5

R1025
R1026
R1027

R176

R177

LED_BELL_B

C194

C195

DG

DG

R178

DG

L105

LCD_TPX1
LCD_TPX2
LCD_TPY1
LCD_TPY2

R431

1

2

3

4

5

6

7

8

TPX1
TPX2
TPY1
TPY2

T17
P13
R18
T18

U13

PWM0

LCD_PWM

LCD_PCLK

LCD_DE

LCD_VSYNC

LCD_HSYNC

LCD_EN

LCD_B[7]

LCD_B[1]

LCD_G[0]

LCD_B[6]

LCD_B[5]

LCD_B[4]

LCD_B[3]

LCD_B[2]

LCD_B[0]

LCD_G[7]

LCD_G[6]

LCD_G[5]

LCD_G[4]

LCD_G[3]

LCD_G[2]

LCD_G[1]

LCD_R[7]

LCD_R[6]

LCD_R[5]

LCD_R[4]

LCD_R[3]

LCD_R[2]

LCD_R[1]

LCD_R[0]

C192

C193

C190

1uF

L102

LCD_TPX1

LCD_TPY1

LCD_TPX2

DG

LCD_TPY2

DG

C189

3.3V

CN1

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

C181

VLED+

003:6D

VLED-

003:6D

DG

C191

DG

C641

C640

C639

C638

C637

C636

C635

C634

C633

C632

C631

C630

C629

C628

C627

C626

C625

C624

C623

C622

C621

C620

C619

C618

C617

C616

C615

C614

C613

C612

C611

C610

DG

DG

To Main LCD

DCIN

C375

C373

R339

IC306

1

SW

2

GND

4

CTRL

5

OV

3

FB

6

VIN

D303

C376

R338

LCD_PWM 004:6C

L307

DG

G

D

G

D

DG

DG

C389

VLED+

006:8D

VLED-

006:8D

R336

C374

R349

R340

12V