LG 22LF4520 Service Manual Download Page 21

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THERMAL

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.

C305

0.1uF

16V

C338
0.1uF

16V

C307

0.1uF

16V

C308

0.1uF

16V

1uF

10V

C332

I2C_SDA

C330
0.1uF

16V

+3.3V_ST

C301

10uF

10V

C337
0.1uF

16V

10uF

10V

C331

C336

0.1uF

16V

C300

10uF

10V

I2C_SCL

SOC_RESET

C303

0.1uF

16V

+3.3V_ST

P_AMP_SDA

C310

0.1uF

16V

R305

P_AMP_SCL

+1.15V_VDDC

MODEL_OPT

C339

0.1uF

16V

+1.15V_VDDC

C340

0.1uF

16V

R304

FHD

C329
0.1uF

16V

R307

C306

0.1uF

16V

+3.3V_ST

C304

1uF

10V

+3.3V_ST

R303

100K

10uF

10V

C302

PWM1

R310

3.9K

1/16W

OPT

R314

100

PWM0

R313

10K

WLED_DIM_ADJ

BLU_CURRENT_CTL

C341
2.2uF

10V

R301
4.7K

+5V

WLED_ENABLE

Q300

MMBT3904(NXP)

DISP_EN

D400

MMBD6100

OPT A2

SB_MUTE

+3.3V_ST

+3.3V

+3.3V_ST

R347

20K

1/16W

D2+_HDMI1

D1+_HDMI1

D1-_HDMI1

CK+_HDMI1

D0-_HDMI1

D2-_HDMI1

CK-_HDMI1

D0+_HDMI1

R322

C314

0.047uF

25V

R329

10K

C313

0.047uF

25V

C312

0.047uF

25V

DSUB_VSYNC

R324

2.4K

C315

0.047uF

25V

R326

DSUB_HSYNC

C318

0.047uF

25V

R333

C320

0.047uF

25V

C317

1000pF

50V

C319

0.047uF

25V

C316

0.047uF

25V

R337

150

R338

180

C321

0.047uF

25V

C322

0.047uF

25V

+1.15V_VDDC

COMP_L_IN

COMP_R_IN

C323

2.2uF

10V

C324

2.2uF

10V

C326

10uF

6.3V

L302

BLM18PG121SN1D

C325

0.1uF

16V

R341

100

L303

BLM18PG121SN1D

IF_AGC

+3.3V

R340

10K

C342

0.1uF

16V

C345

0.047uF
25V

C334

100pF

50V

OPT

C333

100pF

50V

OPT

C327

0.1uF

16V

C328

0.1uF

16V

DIF_N

DIF_P

RXACK+

RXA2-

RXA1+

RXA0-

RXA1-

RXA0+

RXA3+

RXA3-

RXA2+

RXACK-

RXB1-

RXB0+

RXB0-

RXB1+

RXBCK-

RXB2-

RXB3+

RXB3-

RXBCK+

RXB2+

5V_DET_HDMI_1

COMP_DET

AUD_SCK

AUD_LRCK

DSUB_DET

AUD_LRCH

+1.15V_VDDC

R339

X300
24MHz

PWM1

PWM0

HPD1

LED_AMBER

KEY1

SIDE_USB_DM

SOC_RESET

KEY2

SIDE_USB_DP

DDC_SDA_1

DDC_SCL_1

SPI_SDO

/SPI_CS

SPI_SCK

SPI_SDI

PM_TXD

PM_RXD

+1.15V_VDDC

USB1_CTL

USB1_OCD

PANEL_CTL

/FLASH_WP

TU_SCL

TU_SDA

MULTI_ON

P_AMP_SCL

P_AMP_SDA

POWER_ON/OFF1

DISP_EN

R316

100

R317

LED_RED

AMP_RESET_N

I2C_SDA

I2C_SCL

AMP_MUTE

AV_DET

+1.15V_VDDC

MODEL_OPT

C311

0.1uF

16V

C309

10uF

10V

+1.8V_DDR

+3.3V_ST

C335

0.1uF

16V

+3.3V_ST

AR302

AR332

4.7K

AR305

10K

AR308

4.7K

AR309

4.7K

R300

R302

R306

R308

R309

R311

R312

R315

IC301

MSD8222LUM

RX2N_B

RX2P_B

AVDD_MOD_1

RXCN_A

RXCP_A

RX0N_A

RX0P_A

RX1N_A

RX1P_A

RX2N_A

RX2P_A

HSYNC0

BIN0P

GIN0P

GIN0M

RIN0P

VSYNC0

AVDD3P3_ADC

BIN1P

SOGIN1

GIN1P

GIN1M

RIN1P

CVBS0

VCOM

CVBS_OUT1

VDDC_1

AVDD_AU33

LINEIN_R0

LINEIN_L0

LINEIN_R1

LINEIN_L1

VAG

VRM_ADC

LINEOUT_L3

LINEOUT_R3

IFAGC

VIFP

VIFM

AVDD3P3_DADC

AVDD3P3_DMPLL

XTAL_IN

XTAL_OUT

AVDD_MOD_2

VDDIO_CMD

VDDC_2

VDDC_3

GPIO44/I2C_SDAM/UART_TX1

GPIO45/I2C_SCLM/UART_RX1

GPIO46

GPIO47

GPIO49/SPDIF_OUT

GPIO50/I2S_OUT_WS

GPIO51/I2S_OUT_MCK

GPIO52/I2S_OUT_BCK

GPIO53/I2S_OUT_SD

LVA3P

LVA3M

LVACLKP

LVACLKM

LVA2P

LVA2M

LVA1P

LVA1M

LVA0P

LVA0M

GPIO29

GPIO28

LVB3P

LVB3M

LVBCLKP

LVBCLKM

AVDD_LPLL

LVB2P

LVB2M

LVB1P

LVB1M

LVB0P

LVB0M

GPIO7

GPIO6

GPIO5

GPIO4

GPIO2

GPIO1

GPIO0

HOTPLUG_A

PWM1/GPIO14

PWM0/GPIO15

SPI_DO

SPI_DI

SPI_CZ

SPI_CK

DDCA_DA

DDCA_CK

TESTPIN

CEC/GPIO71

IRIN

INT/GPIO64/I2S_OUT_MCK

100

RESET

101

DM_P0

102

DP_P0

103

AVDD_MOD_3

104

SAR0/GPIO75

105

SAR1/GPIO74

106

SAR2/GPIO73

107

VDDC_4

108

VDDIO_DATA

109

GPIO54

110

GPIO55

111

GPIO84

112

GPIO83

113

DDCDA_DAT

114

DDCDA_CLK

115

GPIO67

116

GPIO70

117

GPIO86

118

DDCDB_DAT

119

DDCDB_CLK

120

HOTPLUG_B

121

EFUSE

122

VDDC_5

123

RXCN_B

124

RXCP_B

125

RX0N_B

126

RX0P_B

127

RX1N_B

128

RX1P_B

129

[EP]

C343

30pF

50V

C344

30pF

50V

M1L_USA

MAIN

2013-09-14

MODEL OPTION

MODEL_OPT_1

<SOC_RESET>

FHD

LOW

<HW_OPT>

PIN NAME

HIGH

[M1L] 128 PIN

DIMMING

NON_A_DEMODE
AGC 1.25V
100 OHM SERIAL
A_DEMODE 0ohm

Close to MSTAR

DTV_IF

14.08.21
27->30pF

LGE Internal Use Only

Summary of Contents for 22LF4520

Page 1: ...p eic lgservice com Asia Oceania http biz lgservice com Internal Use Only Printed in Korea P NO CHASSIS MODEL CAUTION BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL SERVICE MANUAL MFL68920123 1501 REV00 22LF4520 22LF4520 PU LU50A LED TV ...

Page 2: ...c All right reserved Only for training and service purposes CONTENTS CONTENTS 2 SAFETY PRECAUTIONS 3 SERVICING PRECAUTIONS 4 SPECIFICATION 6 ADJUSTMENT INSTRUCTION 9 TROUBLE SHOOTING 13 BLOCK DIAGRAM 17 EXPLODED VIEW 18 SCHEMATIC CIRCUIT DIAGRAM APPENDIX ...

Page 3: ... Check With the instrument AC plug removed from AC source connect an electrical jumper across the two AC plug prongs Place the AC switch in the on position connect one lead of ohm meter to the AC plug prongs tied together and touch other ohm meter lead in turn to each exposed metallic parts such as antenna terminals phone jacks etc If the exposed metallic part has a return path to the chassis the ...

Page 4: ...n your body by touching a known earth ground Alternatively obtain and wear a commercially available discharging wrist strap device which should be removed to prevent potential shock reasons prior to applying power to the unit under test 2 After removing an electrical assembly equipped with ES devices place the assembly on a conductive surface such as aluminum foil to prevent electrostatic charge b...

Page 5: ...e solder joints of the two original leads If they are not shiny reheat them and if necessary apply additional solder Fuse and Conventional Resistor Removal Replacement 1 Clip each fuse or resistor lead at top of the circuit board hollow stake 2 Securely crimp the leads of replacement component around notch at stake top 3 Solder the connections CAUTION Maintain original spacing between the replaced...

Page 6: ...with BOM 5 The receiver must be operated for about 5 minutes prior to the adjustment 3 Test method 1 Performance LGE TV test method followed 2 Demanded other specification Safety UL EMI FCC NOTE Specifications and others are subject to change without notice for improvement 4 General specification 4 1 TV 4 2 Feature and Function No Item Specification Remarks 1 Market MEXICO 2 Available Channel 1 Di...

Page 7: ...3 981 60 020 108 000 13 1280 1024 79 976 75 025 135 000 14 1400 1050 65 317 59 978 121 750 15 1440 900 55 935 59 887 106 500 16 1600 900 60 000 60 000 108 000 17 1680 1050 64 674 59 883 119 000 18 1680 1050 65 290 59 954 146 250 19 1920 1080 67 500 60 000 148 500 HDMI DTV No Resolution H freq kHz V freq Hz Pixel clock MHz Remark 1 720 480 31 469 31 5 59 94 60 27 00 27 03 SDTV 480P 2 720 576 31 25 ...

Page 8: ...nent No Specification Remark Resolution H freq kHz V freq Hz 1 720x480 15 73 59 84 720x480i 2 15 73 60 3 720x480 31 47 59 84 720x480p 4 31 5 60 5 1280x720 44 96 59 84 1280x720p 6 45 60 7 1920x1080 33 72 59 84 1920x1080i 8 33 75 60 9 26 97 23 976 1920x1080p 10 27 24 11 33 71 29 97 12 33 75 30 13 67 432 59 84 14 67 5 60 ...

Page 9: ...k Connect tab If display Can t Check connect computer jig and set When you use JIG for checking and download Connect D SUB cable D SUB jack for RS232 Refer to 12page 4 Click Read tab and then load download file XXXX bin by clicking Read 5 Click Auto tab and set as below 6 Click Run 7 After downloading check OK message USB DOWNLOAD 1 Make New folder named LG_DTV and put ISP file bin in the folder 2...

Page 10: ...ad A E 00 10 Automatically download The use of a internal Data 0 1 2 3 4 5 6 7 8 9 A B C D E F 0 0 FF FF FF FF FF FF 0 1E 6D C6 59 1 1 1 1 10 1 19 1 3 80 33 1D 78 EA 62 75 A3 55 4F A0 27 20 12 50 54 A5 6F 0 71 4F 81 C0 81 0 81 80 95 0 30 90 40 A9 C0 B3 0 2 3A 80 18 71 38 2D 40 58 2C 40 45 0 FD 1E 11 0 0 1A 21 39 90 30 62 1A 27 40 50 68 B0 36 0 FD 1E 11 0 0 1C 0 0 0 FD 0 38 60 4B 1E 53 0F 0 0A 20 2...

Page 11: ...INSTOP KEY after completion if the function inspection 4 4 White balance adjustment Equipment 1 Color Analyzer CA 210 LED Module CH 14 2 Adj Computer During auto adj RS 232C protocol is needed 3 Adjust Remocon RGB_Gains are fixed data for each model Insert RS 232C Jack which is connected with PC for White Balance or equivalent device Total Assembly line should be check whether the color coordinate...

Page 12: ...anual W B process using adjusts Remote control 1 After enter Service Mode by pushing ADJ key 2 Enter White Balance by pushing key at White Bal ance When doing Adjustment Please make circumstance as below 4 5 Model Name SW Version Adjust check Press the Instart key of ADJ remote controller 4 5 1 Model Name SW Version Check 1 Check Model Name 2 Check S W Version Refer to the IC Ver in the BOM 4 5 2 ...

Page 13: ...ower Replace X300 N Check C500 Voltage Level 19V Check Power connector OK Replace Adapter Y N Y Check IC501 Output Voltage Level 3 3V Replace IC501 Recheck Y N Check X300 Clock 24MHz Replace IC405 Flash Memory Y Check IC503 Output Voltage Level 5V Replace IC503 Recheck Y N Check IC502 Output Voltage Level 1 15V Replace IC502 Recheck N Y ...

Page 14: ...Check IC700 Q700 Replace LED Driver IC or FET Y N N Check Panel Power 5V P402 01 Check IC503 Output 5V Replace IC503 Recheck Y N Check Panel input Clock P402 10 11 22 23 Check IC300 Repair Main B D Y N Check FFC Cable for Damage or Open Conductors Check LED Driver Output C706 Replace T Con Board or Module Y Check IC300 Replace Main SOC N Check WLED_ENABLE High Y ...

Page 15: ...c All right reserved Only for training and service purposes 3 No Video Digital TV Check RF Cable Y 1 Check RF IC L200 Power 3 3V 2 Check IC501 Output voltage 3 3V Replace IC501 Recheck Y N Check SCL SDA Line TU200 3 4 Replace TU200 or IC300 Main Scaler N ...

Page 16: ...or training and service purposes 4 No Video HDMI Replace Main Scaler IC300 Check input signal format Is it supported Check JK100 for proper connection or Damage Replace Connector Y N Check I2C Signal JK100 Re Download EDID Data Y N Y Check HDMI Cable for Damage or Open Connector Y ...

Page 18: ...lated 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 Shock Fire or other Hazards Do not modify the original design without permission of manufacturer IMPORTANT SAFETY NOTICE 300 200 120 900 540 910 810 LV1 A2 535 820 800 400 ...

Page 19: ... 3 3V_ST JP124 VA114 20V DSUB_HSYNC 2 E18 JP119 DSUB_DET VA117 5 5V R144 75 DSUB_B DSUB_VSYNC 2 E18 JP122 R145 75 D103 MMBD6100 A2 C A1 DSUB_R JP125 VA119 20V R148 75 DSUB_G JP121 VA120 20V JK105 SPG09 DB 010 1 RED 2 GREEN 3 BLUE 4 GND_1 5 DDC_GND 6 RED_GND 7 GREEN_GND 8 BLUE_GND 9 NC 10 SYNC_GND 11 GND_2 12 DDC_DATA 13 H_SYNC 14 V_SYNC 15 DDC_CLOCK 16 SHILED Q103 MMBT3904 NXP E B C VA121 20V VA11...

Page 20: ... 0 1uF 16V C211 100pF 50V C207 0 1uF 16V C209 20pF 50V OPT TU_SDA C206 18pF 50V C214 100uF 16V 105C OPT 3 3V_TU IF_AGC DIF_P TU200 TDSS H701F 5 B1 3 3V 11 DIF N 2 NC_2 10 DIF P 4 SDA 1 NC_1 9 IF_AGC 8 NC_5 3 SCL 7 NC_4 6 NC_3 12 SHIELD A1 A1 B1 B1 R206 1K AR200 33 AR201 33 Tuner block 2 M1L 7 2013 07 13 TUNER 60mA 1 should be guarded by ground 2 No via on both of them 3 Signal Width 12mils Signal ...

Page 21: ...P_SCL P_AMP_SDA POWER_ON OFF1 DISP_EN R316 100 R317 22 LED_RED AMP_RESET_N I2C_SDA I2C_SCL AMP_MUTE AV_DET 1 15V_VDDC MODEL_OPT C311 0 1uF 16V C309 10uF 10V 1 8V_DDR 1 8V_DDR 3 3V_ST 3 3V_ST 3 3V_ST 3 3V_ST C335 0 1uF 16V 3 3V_ST AR302 33 AR332 4 7K AR305 10K AR308 4 7K AR309 4 7K R300 33 R302 33 R306 33 R308 33 R309 33 R311 33 R312 33 R315 33 IC301 MSD8222LUM 1 RX2N_B 2 RX2P_B 3 AVDD_MOD_1 4 RXCN...

Page 22: ... 1uF 16V RXA3 RXB1 RXA3 RXB0 RXB2 RXA0 RXA2 5V_PANEL_POWER RXB1 RXACK RXA0 RXACK 12V_PANEL_POWER P401 10031HR 30 HD_Panel 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 R416 0 Non CMI 29 R415 5 6K R418 4 7K OPT RXBCK RXB3 R419 5 6K RXA0 R420 100 OPT RXA1 JP413 RXA2 RXA3 R414 5 6K RXA3 JP412 RXA1 RXB0 R421 5 6K 3 3V 3 3V_ST 3 3V_ST D410 30V CDS3C30GTH D411 30V C...

Page 23: ...105C 12V_Normal POWER_ON OFF1 L501 10uH R537 10K C504 2 2uF 25V HD 12V Panel C520 0 1uF 16V C501 10uF 25V OPT R519 33K R506 68 C531 10uF 10V R521 100K 1 HD 12V Panel 3 3V_ST R505 68 HD 12V Panel C510 0 47uF 16V OPT R518 33K PANEL_CTL 12V_Normal C519 0 1uF 16V C530 0 1uF 16V C518 0 1uF 16V R525 10K 1 R549 10K R559 1K 1 8V_DDR 3 3V R551 0 FHD_Panel R550 0 HD_Panel R541 0 HD_Panel R539 0 FHD_Panel Q5...

Page 24: ...OPT E B C 19V C628 47uF 25V 105C OPT SB_MUTE R615 12K OPT D601 KDS226 OPT A AC C R614 12K OPT AMP_MUTE R612 47K OPT C613 100uF 25V 105C OPT C614 100uF 25V 105C OPT C608 10uF 10V 0 33uF C622 50V 0 33uF C623 50V 0 33uF C624 50V 0 33uF C621 50V IC600 BM28720MUV 1 ADDR 3 LRCK 7 REG15 9 TEST2 10 DVDD 11 TEST3 12 STADAO 13 ERROR 14 NC_1 15 BSP2N 16 OUT2N 17 VCCP2 18 GNDP2 19 BSP2P 20 OUT2P 21 OUT1N 22 B...

Page 25: ... R726 0 LED_CH1 R716 1 5K 1 R713 220K 1 L700 33uH BLU_CURRENT_CTL 19V R705 100 R708 0 LGD FHD NEW 23 6 R709 0 LGD FHD NEW 23 6 R710 0 LGD FHD NEW 23 6 R712 0 LGD FHD NEW 23 6 Vout Vout CH1 CH2 CH3 CH4 CH3 CH1 CH4 CH2 D701 100V BR210 C706 33uF 100V 55TO 105C R1001 0 NEW 23 6 R1002 0 NEW 23 6 R1003 0 NEW 23 6 R1006 0 NOT23 6 R1007 0 NEW 23 6 R1010 0 NOT23 6 P702 12507WR 06L LED WAFER_LEFT 1 2 3 4 5 ...

Page 26: ......

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LG 22LF4520, Service Manual

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