DOWNLOAD LG 50PG70F-UB (CHASSIS:PU82C) Service Manual ↓ Size: 9.59 MB | Pages: 30 in PDF or view online for FREE

- 21 -

Power Sequence and Flow Diagram

+16V

+16V

NTP3000A

(Sound IC)

REG

IC

BIAS

Side power

+12.0V

+12.0V

+9V

IC811

KA7809

IC803

KIA78R05F

+5V_TUNER

TU1

TDVF-H051F

ST_5V

ST_5V

Local key/IR power

IC202

ICL3232

RS-232C RX/TX

Q804

SI4925BDY

IC102

AT24C16AN

(EEPROM)

+5.0

IC407

MTV416GMF

(

micom

)

HDMI CEC

Inv/RL

3.3V->5V

Q805

SI4925BDY

IC408

Comercial

 

IC404

3.3V_MICOM

IC402

RS232C Driver

BCM

I2C Pull up

IC201

USB_Power

IC403

NVRAM

IC500

CS5345

HPD 5V

IF AGC

RGB SW

AV1/2

Component1/2

IC809

3.3V_Reg

IC805

1.2V_Reg

IC810

2.6V_Reg

- 22 -

Power Sequence and Flow Diagram

+12V

+12V

REG

IC

BIAS

Side power

IC811

KA7809ERTM

TUNER

+5V_TU

Tuner SIF 

IC803

KIA78R05F

+9.0V

BIAS

BCM L/R OUT

RGB Buffer

BIAS

+16V

+16V

IC500

NTP300A

- 23 -

- 24 -

603

602

601

520

400

590

501

307

120

121

306

560

570

571

310

302

303

305

300

304

200

240

250

208

201

204

207

A2

205

206

580

202

203

301

901

900

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.