LG 32LG30 Series Service Manual Download Page 17 | Manualshive

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Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes

LGE Internal Use Only

- 17 -

BLOCK DIAGRAM

Audio L/R

Flash

(16MB)

DDR(32MB)

(4x16x4)

DDR(32MB)

(4x16x4)

74LVC14APW

TEA6420D

(Audio SW)

MC33078

(AMP)

CS5340

(A/D)

MTV416

(

M

icom

)

NTP3000

(D-AMP)

X200

X-tal(54 MHz

)

PI3HDMI341ATR

(3x1,S/W)

EEPROM

AT/NT

Tuner

64Bit I/F

Reset

CVBS

CVBS/Y/C

Y/

Cb

/Cr

R/G/B

H/V Sync

Audio L/R

I2S

MNT out

(L/R)

SPDIF

OUT

I2S

Dual LVDS

Connector (FHD)

Full HD(1080P)

RS-232C

Dead IC when Standby

Alive IC when Standby

Video

Front

End

Dual

HDMI

Rx

HD/SD

Video

Encoder

Audio

DSP

BCM3552(HD)

BCM3553(FHD)

MCLK

MCLK

HDMI CEC

HDMI CEC(To

Micom

)

To Micom

SDA

SCL

SIF

IF(AT)

Buffer

Digital out

Single LVDS

Connector (HD)

Digital out

WXGA(768P)

IR & Local KEY

Buffer

Buffer

24C16

AGC CTL (From BCM)

USB2.0

I2S Audio Input

VSB/QAM/NTSC/SIF

AV1

AV2

COMP1

COMP2

CVBS

DDR(32MB)

(4x16x4)

DDR(32MB)

(4x16x4)

DDR(32MB)

(4x16x4)

DDR(32MB)

(4x16x4)

DDR(32MB)

(4x16x4)

DDR(32MB)

(4x16x4)

DDR (128MB)

RGB

Y/

Cb

/Cr

HDMI1

HDMI2

HDMI3

AV1

AV2

COMP1

COMP2

RGB

Coaxial

OUT (LG50)

USB

LG30: HD

LG50: FHD

X400

X-tal(24

MHz

)

NVRAM

24C512

EEPROM

EEPROM

EEPROM

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Summary of Contents for 32LG30 Series

Page 1: ...LCD TV SERVICE MANUAL CAUTION BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL CHASSIS LA85A MODEL 32LG30 32LG30 UA website http biz LGservice com Internal Use Only ...

Page 2: ...right reserved Only for training and service purposes LGE Internal Use Only CONTENTS CONTENTS 2 PRODUCT SAFETY 3 SPECIFICATION 6 ADJUSTMENT INSTRUCTION 9 TROUBLE SHOOTING 15 BLOCK DIAGRAM 17 EXPLODED VIEW 18 REPLACEMENT PARTS LIST 20 SVC SHEET ...

Page 3: ...fe to operate without damage of electrical shock Leakage Current Cold Check Antenna Cold 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 term...

Page 4: ... on 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...

Page 5: ... the 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 repla...

Page 6: ...nt 1 Temp 20 60 deg 2 Humidity 0 85 1 Application Range This spec sheet is applied to the 26 32 LCD TV used LA85A chassis 2 Specification Each part is tested as below without special appointment 1 Temperature 20 5 C 2 Relative Humidity 65 10 3 Power Voltage Standard input voltage 100 240V 50 60Hz Standard Voltage of each products is marked by models 4 Specification and performance of each parts ar...

Page 7: ...1 32LG30 UA 7 Color Temperature Cool 10 000 11 000 12 000 Test Signal Standard 8 300 9 300 10 300 HDMI input 85 Full white Warm 5 500 6 500 7 500 pattern 8 Color Distortion DG 10 0 9 Color Distortion DP 10 0 deg 10 Color S N AM FM 43 0 dB 11 Color Killer Sensitivity 80 dBm 6 Component Video Input Y PB PR No Specification Remark Resolution H freq kHz V freq Hz Pixel clock 1 720 480 15 73 59 94 13 5...

Page 8: ...V freq Hz Pixel clock MHz Remark PC DDC 1 640 480 31 469 59 94 25 17 VESA VGA O 2 800 600 37 879 60 31 40 00 VESA SVGA O 3 1024 768 48 363 60 00 65 00 VESA XGA O 4 1280 768 47 776 59 87 79 50 CVT WXGA O 5 1360 768 47 720 59 799 84 75 CVT WXGA O 6 1366 768 47 13 59 65 72 DTV 1 720 480 31 50 60 27 027 SDTV 480P 2 720 480 31 47 59 94 27 00 SDTV 480P 3 1280 720 45 00 60 00 74 176 HDTV 720P 4 1280 720 ...

Page 9: ...ction condition from the used device 2 Apply 480i Mode Horizontal 100 Color Bar Pattern to Comp1 port MSPG 925FA Model 209 Pattern 65 3 Set the input to Component1 and select ÆNormal Ø as video 4 Wait for one second or longer after receiving the signal press the ADJ key of the R C to enter into Ez Adjust select 3 ADC 480i Comp1 and press the Enter key to automatically adjust 5 If it is normally ad...

Page 10: ... 30 40 70 40 36 00 C4 8E 21 00 00 1E 02 3A 80 18 71 38 2D 40 50 58 2C 45 00 C4 8E 21 00 00 1E 00 00 00 FD 00 30 60 58 1F 64 11 00 0A 20 20 20 20 20 20 00 00 00 FC 70 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 01 8A 0 1 2 3 4 5 6 7 8 9 A B C D E F 0 02 03 18 F1 47 84 05 03 02 20 22 10 23 15 07 50 10 67 03 0C 00 10 00 B8 2D 01 1D 00 72 51 D0 1E 20 20 6E 28 55 00 C4 8E 21 00 00 1E 01 1D 80 18 71 1C 30...

Page 11: ...0C 00 30 00 B8 2D 01 1D 00 72 51 D0 1E 20 20 6E 28 55 00 C4 8E 21 00 00 1E 01 1D 80 18 71 1C 30 16 20 58 2C 25 00 C4 8E 21 00 00 9E 8C 0A D0 8A 40 20 E0 2D 10 10 3E 96 00 C4 8E 21 00 00 18 8C 0A 50 D0 8A 20 E0 2D 10 10 3E 96 00 13 8E 21 00 00 18 60 26 36 80 A0 70 38 1F 40 30 20 25 00 C4 8E 21 00 70 00 1A 00 00 00 00 00 00 00 00 00 00 00 00 00 07 0 1 2 3 4 5 6 7 8 9 A B C D E F 0 00 FF FF FF FF FF ...

Page 12: ...e menu and it is set to INNER as default If the adjustment cannot be done by the inner pattern select the HDMI to adjust Adjustment environment and reference 1 Environment illuminance Adjust it to 10 LUX or less at the place where the light source such as lamp should be blocked at maximum 2 Probe location Maintain the Color Analyzer CA 210 close to the module surface by 10cm or less and keep the p...

Page 13: ...EST voltage GND 1 5KV min at 100mA SIGNAL 3KV min at 100mA 2 TEST time 1 second 3 TEST POINT GND test between Power cord GND and Signal cable metal GND Resisting pressure test between Power cord GND and Live Neutral 4 LEAKAGE CURRENT Set to 0 5mArms 9 ISP Download option 9 1 Overview The Micom upgrade via the external port for the service for the customer 9 2 Device to use 1 PC 2 B D for the inter...

Page 14: ...ion Information check the S W version to upgrade at New Found TV Software Version Information and press the Enter button of the TV remote controller 4 Downloading is proceeded as shown at the below screen and when it is ended turning on off is automatically done When the automatic proceeding is not smoothly done manually perform the power On Off 5 When downloading is ended remove the USB Memory St...

Page 15: ...the Power of LPF you should decide to replace item or not No Check the output Pin 1 of LPF IC808 Can you see the normal waveform Yes Yes After checking Power of LPF you should decide to replace item or not No This board has big problem because Main chip BCM355x have some troubles After checking throughly all path once again You should dicide to replace BCM355x or not No 2 Video doesn t display Che...

Page 16: ...he normal waveform JK705 may have problem Replace this Jack No This board has big problem because Main chip BCM355x have some troubles After checking throughly all path once again You should dicide to replace BCM355x or not No Check DDC communication lines IC601 IC603 IC701 Yes Check the input and output of BCM355x IC100 Especially you should check the H V sync and clock Can you see the normal wav...

Page 17: ...Full HD 1080P RS 232C Dead IC when Standby Alive IC when Standby Video Front End Dual HDMI Rx HD SD Video Encoder Audio DSP BCM3552 HD BCM3553 FHD MCLK MCLK HDMI CEC HDMI CEC To Micom To Micom SDA SCL SIF IF AT Buffer Digital out Single LVDS Connector HD Digital out WXGA 768P IR Local KEY Buffer Buffer 24C16 AGC CTL From BCM USB2 0 I2S Audio Input VSB QAM NTSC SIF AV1 AV2 COMP1 COMP2 CVBS DDR 32MB...

Page 18: ...onics Inc All right reserved Only for training and service purposes LGE Internal Use Only 18 EXPLODED VIEW 300 200 510 500 120 122 400 401 800 801 802 804 803 530 540 521 820 821 805 550 910 904 902 901 905 903 900 830 822 121 ...

Page 19: ...215 D1 2V_BCM OPT R216 OPT R213 0 R211 4 7uF 6 3V C250 BCM_RESET 4 C2 4 7K R210 D3 3V_BCM RST_OUTb 1 J 2 0 1uF C295 JP2016 TP2025 100K R212 TP2014 4 7uF 6 3V C204 3 3V 0 1uF 16V C203 0 1uF 16V C202 0 R201 A2 6V_BCM A1 2V_BCM 0 1uF 16V C201 1K R230 0 R226 GND 0 R200 54MHz_XTAL_N H6 USB_DP1 C3 54MHz_XTAL_P H6 0 1uF 16V C268 54MHz_XTAL_N C2 0 1uF C297 USB_POWER_OUT_1 C8 TP2013 54MHz_XTAL_P C2 1 5K R2...

Page 20: ...N AM3 HDMI_RX_0_DATA1_P AM4 HDMI_RX_0_DATA2_N AP2 HDMI_RX_0_DATA2_P AN3 HDMI_RX_0_VDD3P3 AK6 HDMI_RX_0_VDD1P2 AJ7 HDMI_RX_0_VDD2P5 AK5 HDMI_RX_0_PLL_AVDD1P2 AG8 HDMI_RX_0_AVSS AJ8 HDMI_RX_0_PLL_AVSS AG7 HDMI_RX_1_CEC_RES AJ4 HDMI_RX_1_CEC_DAT AK3 HDMI_RX_1_HTPLG_IN AG4 HDMI_RX_1_HTPLG_OUT AF8 HDMI_RX_1_DDC_SCL AG6 HDMI_RX_1_DDC_SDA AG5 HDMI_RX_1_RESREF AH6 HDMI_RX_1_CLK_N AH2 HDMI_RX_1_CLK_P AH1 H...

Page 21: ...NPORT_TA4 _TO_TXB0 1 E4 LVDS_TX_OUT_PINPORT_TAC _TO_TXBC 1 E5 LVDS_TX_OUT_PINPORT_TAC TO_TXBC 1 E5 0 R2930 FHD LVDS_TX_OUT_PINPORT_TA2 _TO_TXB3 1 E4 LVDS_TX_OUT_PINPORT_TA0 _TO_TXB4 1 E3 LVDS_TX_OUT_PINPORT_TA0 _TO_TXB4 1 E3 0 R2917 FHD LVDS_TX_OUT_PINPORT_TA2 _TO_TXB3 1 E4 0 R2918 FHD 0 R2931 FHD GND 1K R922 Module Selection Low 47K R9904 GND 1K R900 2SC3875S Q902 E B C 47K R9905 TP9001 GND 1uF 2...

Page 22: ...Feb 2008 Printed in Korea P NO MFL41524403 ...

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