DOWNLOAD LG 42PC7RA-MA (CHASSIS:PP78B) Service Manual ↓ Size: 8.36 MB | Pages: 31 in PDF or view online for FREE

- 25 -

SIDE_Y/C 

PC_Audio

RF

PC_Audio_L/R

TUNER 

TV_V

S I F

AV_RCA 

MNT_OUT 

COMP1

COMP2 

COMP_Y/Pb/Pr 

TDA3107D2 

Amp

Tx0/1/2/3/4/C

12V Panel /DISP_EN

R_SPK_OUT 

#1 RX 0/1/2/CLK

 

 DDC_SCL/SDA1/2 

HDMI

(PC/DTV) 

SCART1 

SCART2 

SCART

 

RGB

COMP1_Y/Pb/Pr 

TV_OUT 

  SCART1,2_R/L 

 R/L_Audio 

(Analog_out)  

RGB

(PC/DTV)

 PC_RGB 

A V             S-A V 

   

SIDE_V  

PC_SCL/SDA 

 I

2 

C 

L_SPK_OUT 

RT-OPTION

RGB_HS/VS 

HDMI_HS/VS 

30P_LVDS

HEAD_OUT

L/R 

HEAD_OUT

L/R 

  COMP2_R/L 

HS/VS

PIP OPTION 

ANX9021

(TMDS RECIEVER)

TEA6420

 Sound switch

#2 RX 0/1/2/CLK

 

SIDE_R/L

SCART1,2_V (RCA1,2_V)

EEPROM

   SUB-TUNER 

VIDEO_DECODER

TW9909

EEPROM

VCT-Pro

(Lip-sync)

  SCART_FB

AV_AUDIO R/L

AM_AUDIO 

 COMP1_R/L 

 I

2 

C 

 RX 0/1/2/CLK

 

TV_OUT

MNT_OUT

PIP_V

ITU-656_IN

SCART1,2_I D

HDMI_Y/

Pb

/Pr(1080P

)

SCART_RGB 

STMAV335

(MUX)

RT- OPTION

COMP1_R/L 

RCA1,2_V(OPTION) 

COMP2_Y/Pb/Pr

(OPTION) 

 COMP2_R/L 

MC74HC4066

DOWNLOAD_SW 

 

 I

2 

C 

 I

2 

C 

 I

2 

C 

COMP1_Y/Pb/Pr

 

COMP2_Y/Pb/Pr

(OPTION)

 

74ACT253

(MUX)

TV_SUB

- 26 -

305

300

306

121

600

601

304

200

206

580

303

501

520

400

240

201

202

205

203

204

250

900

502

301

302

120

570

560

310

A21

A2

Many electrical and mechanical parts in this chassis have special safety-related characteristics. These
parts are identified by       in the Schematic Diagram and EXPLODED VIEW. 
It is essential that these special safety parts should be replaced with the same components as
recommended in this manual to prevent X-RADIATION, Shock, Fire, or other Hazards. 
Do not modify the original design without permission of manufacturer.