LG 32LW570G Bedienungsanleitung

LED LCD TV

SERVICE MANUAL

CAUTION

BEFORE SERVICING THE CHASSIS,

READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

CHASSIS : LD12C

MODEL: 32LW570G/570S/575S/579S

MODEL: 32LW570G/570S-ZD 32LW575S-ZC

MODEL: 32LW579S-ZE

North/Latin America http://aic.lgservice.com

Europe/Africa http://eic.lgservice.com

Asia/Oceania http://biz.lgservice.com

Internal Use Only

Printed in KoreaP/NO : MFL67002325 (1104-REV00)

Only for training and service purposes

CONTENTS

CONTENTS .............................................................................................. 2

PRODUCT SAFETY ................................................................................. 3

SPECIFICATION ...................................................................................... 4

ADJUSTMENT INSTRUCTION ............................................................. 10

BLOCK DIAGRAM ................................................................................. 19

EXPLODED VIEW .................................................................................. 20

SCHEMATIC CIRCUIT DIAGRAM ..............................................................

Only for training and service purposes

SAFETY PRECAUTIONS

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

Shock, Fire, or other Hazards.

Do not modify the original design without permission of manufacturer.

General Guidance

An isolation Transformer should always be used during the

servicing of a receiver whose chassis is not isolated from the AC

power line. Use a transformer of adequate power rating as this

protects the technician from accidents resulting in personal injury

from electrical shocks.

It will also protect the receiver and it's components from being

damaged by accidental shorts of the circuitry that may be

inadvertently introduced during the service operation.

If any fuse (or Fusible Resistor) in this TV receiver is blown,

replace it with the specified.

When replacing a high wattage resistor (Oxide Metal Film Resistor,

over 1 W), keep the resistor 10 mm away from PCB.

Keep wires away from high voltage or high temperature parts.

Before returning the receiver to the customer,

always perform an AC leakage current check on the exposed

metallic parts of the cabinet, such as antennas, terminals, etc., to

be sure the set is safe 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 terminals, phone

jacks, etc.

If the exposed metallic part has a return path to the chassis, the

measured resistance should be between 1 MΩ and 5.2 MΩ.

When the exposed metal has no return path to the chassis the

reading must be infinite.

An other abnormality exists that must be corrected before the

receiver is returned to the customer.

Leakage Current Hot Check (See below Figure)

Plug the AC cord directly into the AC outlet.

Do not use a line Isolation Transformer during this check.

Connect 1.5 K / 10 watt resistor in parallel with a 0.15 uF capacitor

between a known good earth ground (Water Pipe, Conduit, etc.)

and the exposed metallic parts.

Measure the AC voltage across the resistor using AC voltmeter

with 1000 ohms/volt or more sensitivity.

Reverse plug the AC cord into the AC outlet and repeat AC voltage

measurements for each exposed metallic part. Any voltage

measured must not exceed 0.75 volt RMS which is corresponds to

0.5 mA.

In case any measurement is out of the limits specified, there is

possibility of shock hazard and the set must be checked and

repaired before it is returned to the customer.

Leakage Current Hot Check circuit

1.5 Kohm/10W

To Instrument's

exposed

METALLIC PARTS

Good Earth Ground

such as WATER PIPE,

CONDUIT etc.

AC Volt-meter

When 25A is impressed between Earth and 2nd Ground

for 1 second, Resistance must be less than 0.1

*Base on Adjustment standard

IMPORTANT SAFETY NOTICE

0.15 uF

Ω

Only for training and service purposes

SPECIFICATION

NOTE : Specifications and others are subject to change without notice for improvement

1. Application range

This specification is applied to the LED LCD TV used LD12C

chassis.

2. Requirement for Test

Each part is tested as below without special appointment.

1) Temperature: 25 ºC ± 5 ºC(77 ºF ± 9 ºF), CST: 40 ºC ± 5 ºC

2) Relative Humidity : 65 % ± 10 %

3) Power Voltage

: Standard input voltage (AC 100-240 V~, 50 / 60 Hz)

* Standard Voltage of each products is marked by models.

4) Specification and performance of each parts are followed

each drawing and specification by part number in

accordance 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 : CE, IEC specification

- EMC :CE, IEC

4. Model General Specification

No. Item Specification Remarks

1 Market EU(PAL Market-36Countries) DTV & Analog (Total 36 countries)

DTV (MPEG2/4, DVB-T) : 31 countries

(England/Italy/Germany/France/Spain/Sweden/Finland/Netherlands/Belgium/Luxemburg/

Greece/Denmark/Czech/Austria/Hungary/Swiss/Croatia/Turkey/Norway/Slovenia/Poland/

Ukraine/Portugal/Ireland/Morocco/Latvia/Estonia/Lithuania/Rumania/Russia/Slovakia)

DTV (MPEG2/4, DVB-T2): 5 countries (England/Denmark/Sweden/Finland/Norway)

DTV (MPEG2/4, DVB-C): 10 countries

Sweden/Finland/Austria/Swiss/Germany/Netherlands/Hungary/Slovenia/Norway/Denmark

DTV (MPEG2/4,DVB-S): 31 countries

Albania/Austria/Belgium/Bosnia/Bulgaria/Croatia/Czech/Estonia/France/Germany/Greece/

Hungary/Ireland/Italy/Kazakhstan/Latvia/Lithuania/Luxembourg/Morocco/Netherlands/Poland/

Portugal/Romania/Russia/Serbia/Slovenia/Spain/Slovakia/Switzerland/Turkey/Ukraine

Analog Only - 5 countries (Bosnia/Serbia/Bulgaria/Albania/Kazakhstan)

Supported satellite : 22 satellites

HISPASAT 1C/1D, ATLANTIC BIRD 2, NILESAT 101/102, ATLANTIC BIRD 3, AMOS 2/3,

THOR 5/6, IRIUS 4, EUTELSAT-W3A, EUROBIRD 9A, EUTELSAT-W2A, HOTBIRD 6/8/9,

EUTELSAT-SESAT, ASTRA 1L/H/M/KR, ASTRA 3A/3B, BADR 4/6, ASTRA 2D, EUROBIRD

3, EUTELSAT-W7, HELLASSAT 2, EXPRESS AM1, TURKSAT 2A/3A, INTERSAT10

2 Broadcasting system 1) PAL-BG

2) PAL-DK

3) PAL-I/I’

4) SECAM L/L’, DK, BG, I

5) DVB-T

6) DVB-C

7) DVB-T2

8) DVB-S DVB-S :Satellite

Only for training and service purposes

No. Item Specification Remarks

3 Receiving system Analog : Upper Heterodyne GDVB-T

Digital : COFDM , QAM - Guard Interval(Bitrate_Mbit/s)

1/4, 1/8, 1/16, 1/32

- Modulation : Code Rate

QPSK : 1/2, 2/3, 3/4, 5/6, 7/8

16-QAM : 1/2, 2/3, 3/4, 5/6, 7/8

64-QAM : 1/2, 2/3, 3/4, 5/6, 7/8

GDVB-T2

- Guard Interval(Bitrate_Mbit/s)

1/4,1/8,1/16,1/32,1/128,19/128,19/256,

- Modulation : Code Rate

QPSK : 1/2, 2/5, 2/3, 3/4, 5/6

16-QAM : 1/2, 2/5, 2/3, 3/4, 5/6

64-QAM : 1/2, 2/5, 2/3, 3/4, 5/6

256-QAM : 1/2, 2/5, 2/3, 3/4, 5/6

GDVB-C

- Symbolrate : 4.0Msymbols/s to 7.2Msymbols/s

- Modulation : 16QAM, 64-QAM, 128-QAM and 256-QAM

GDVB-S

- Symbolrate

DVB-S2 (8PSK/ QPSK) : 2 ~ 45 Msymbol/s

DVB-S (QPSK) : 2~ 45 Msymbol/s

-viterbi

DVB-S mode :1/2, 2/3, 3/4, 5/6, 7/8

DVB-S2 mode : 1/2, 23, 3/4, 3/5, 4/5, 5/6, 8/9, 9/10

Scart Gender Jack(1EA)

PAL, SECAM

Scart Jack is Full scart and support MNT/DTV-OUT, DTV Recording(not support DTV Auto AV)

5 Video Input RCA(2EA) PAL, SECAM, NTSC 4System : PAL, SECAM, NTSC, PAL60

Rear 1EA, AV gender jack 1EA

6 Head phone out Antenna, AV1, AV2, AV3,

Component, RGB, HDMI1, HDMI2,

HDMI3, HDMI4 USB

7 Component Input(1EA) Y/Cb/Cr, Y/Pb/Pr Component Gender 1EA

8 RGB Input RGB-PC Analog(D-SUB 15PIN)

9 HDMI Input (4EA) HDMI1-DTV/DVI PC(HDMI version 1.3)

HDMI2-DTV Support HDCP

HDMI3-DTV

HDMI4-DTV

10 Audio Input (4EA) RGB/DVI Audio, Component, AV1, 2 L/R Input

11 SDPIF out (1EA) SPDIF out

12 USB (2EA) EMF, DivX HD, JPEG, MP3, DivX HD

For Service (download) - USB current : max 500 mA

- USB voltage : 4.75 V - 5.25 V

13 Wireless jack (1EA) 24V power & control Voltage : 24 V, Power : max 8 W

Only for training and service purposes

5. Component Video Input (Y, CB/PB, CR/PR)

No. Specification Remark

Resolution H-freq(kHz) V-freq(Hz)

1. 720x480 15.73 60.00 SDTV,DVD 480i

2. 720x480 15.63 59.94 SDTV,DVD 480i

3. 720x480 31.47 59.94 480p

4. 720x480 31.50 60.00 480p

5. 720x576 15.625 50.00 SDTV,DVD 625 Line

6. 720x576 31.25 50.00 HDTV 576p

7. 1280x720 45.00 50.00 HDTV 720p

8. 1280x720 44.96 59.94 HDTV 720p

9. 1280x720 45.00 60.00 HDTV 720p

10. 1920x1080 31.25 50.00 HDTV 1080i

11. 1920x1080 33.75 60.00 HDTV 1080i

12. 1920x1080 33.72 59.94 HDTV 1080i

13. 1920x1080 56.250 50 HDTV 1080p

14. 1920x1080 67.5 60 HDTV 1080p

No. Specification Proposed Remarks

Resolution H-freq(kHz) V-freq(Hz) Pixel Clock(MHz)

1. 720*400 31.468 70.08 28.321 For only DOS mode

2. 640*480 31.469 59.94 25.17 VESA Input 848*480 60 Hz, 852*480 60 Hz

-> 640*480 60 Hz Display

3. 800*600 37.879 60.31 40.00 VESA

4. 1024*768 48.363 60.00 65.00 VESA(XGA)

5. 1360*768 47.72 59.8 84.75 WXGA

6. 1920*1080 66.587 59.93 138.625 WUXGA FHD model

6. RGB (PC)

Only for training and service purposes

7. HDMI Input

(1) DTV Mode

No. Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed Remark

1. 720*400 31.468 70.08 28.321 HDCP

2. 640*480 31.469 59.94 25.17 VESA HDCP

3. 800*600 37.879 60.31 40.00 VESA HDCP

4. 1024*768 48.363 60.00 65.00 VESA(XGA) HDCP

5. 1360*768 47.72 59.8 84.75 WXGA HDCP

6. 1280*1024 63.595 60.0 108.875 SXGA HDCP/FHD model

7. 1920*1080 67.5 60.00 138.625 WUXGA HDCP/FHD model

(2) PC Mode

No. Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed Remark

1. 720*480 31.469 /31.5 59.94 /60 27.00/27.03 SDTV 480P

2. 720*576 31.25 50 54 SDTV 576P

3. 1280*720 37.500 50 74.25 HDTV 720P

4. 1280*720 44.96 /45 59.94 /60 74.17/74.25 HDTV 720P

5. 1920*1080 33.72 /33.75 59.94 /60 74.17/74.25 HDTV 1080I

6. 1920*1080 28.125 50.00 74.25 HDTV 1080I

7. 1920*1080 26.97 /27 23.97 /24 74.17/74.25 HDTV 1080P

8. 1920*1080 33.716 /33.75 29.976 /30.00 74.25 HDTV 1080P

9. 1920*1080 56.250 50 148.5 HDTV 1080P

10. 1920*1080 67.43 /67.5 59.94 /60 148.35/148.50 HDTV 1080P

Only for training and service purposes

8. 3D Mode

(1) HDMI Input (1.4a)

No. Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed 3D input proposed mode

1 1920*1080 53.95 / 54 23.98 / 24 148.35/148.5 HDTV 1080P Frame packing

2 1280*720 89.9 / 90 59.94/60 148.35/148.5 HDTV 720P Frame packing

3 1280*720 75 50 148.5 HDTV 720P Frame packing

4 1920*1080 67.5 60 148.5 HDTV 1080P Side by Side(half), Top and bottom

5 1920*1080 56.3 50 148.5 HDTV 1080P Side by Side(half), Top and bottom

6 1280*720 45 60 74.25 HDTV 720P Side by Side(half), Top and Bottom

7 1280*720 37.5 50 74.25 HDTV 720P Side by Side(half), Top and Bottom

8 1920*1080 33.7 60 74.25 HDTV 1080i Side by Side(half), Top and Bottom

9 1920*1080 28.1 50 74.25 HDTV 1080i Side by Side(half), Top and Bottom

10 1920*1080 27 24 74.25 HDTV 1080P Side by Side(half), Top and Bottom

11 1920*1080 33.7 30 89.1 HDTV 1080P Side by Side(half), Top and Bottom

No. Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed 3D input proposed mode

1 1280*720 45.00 60.00 74.25 HDTV 720P Side by Side, Top & Bottom

2 1280*720 37.500 50 74.25 HDTV 720P Side by Side, Top & Bottom

3 1920*1080 33.75 60.00 74.25 HDTV 1080I Side by Side, Top & Bottom

4 1920*1080 28.125 50.00 74.25 HDTV 1080I Side by Side, Top & Bottom

5 1920*1080 27.00 24.00 74.25 HDTV 1080P Side by Side, Top & Bottom,

Checkerboard

6 1920*1080 33.75 30.00 74.25 HDTV 1080P Side by Side, Top & Bottom,

Checkerboard

7 1920*1080 67.50 60.00 148.5 HDTV 1080P Side by Side, Top & Bottom,

Checkerboard, Single Frame Sequential

8 1920*1080 56.250 50 148.5 HDTV 1080P Side by Side, Top & Bottom,

Checkerboard, Single Frame Sequential

(2) HDMI Input (1.3)

(3) RF 3D Input(DTV)

No. Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed 3D input proposed mode

1 1280*720 37.500 50 74.25 HDTV 720P Side by Side, Top & Bottom

2 1920*1080 28.125 50 74.25 HDTV 1080I Side by Side, Top & Bottom

(4) USB Input

No. Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) 3D input proposed mode Proposed

1 1920*1080 33.75 30.000 74.25 Side by Side HDTV 1080P

Top & Bottom

Checkerboard

Only for training and service purposes

(7) 3D Input mode

(5) RGB-PC Input

No. Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed 3D input proposed mode

1 1920*1080 67.5 60 148.5 HDTV 1080P Side by Side, Top & Bottom

(6) DLNA

No. Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed 3D input proposed mode

1 1920*1080 33.75 30 HDTV 1080P Side by Side, Top & Bottom,

Checkerboard

No. Side by Side Top & Bottom Checkerboard Single Frame Sequential Frame Packing

Only for training and service purposes

ADJUSTMENT INSTRUCTION

1. Application Range

This specification sheet is applied to all of the LED LCD TV

with LD12C chassis.

2. Designation

(1) Because this is not a hot chassis, it is not necessary to use

an isolation transformer. However, the use of isolation

transformer will help protect test instrument.

(2) Adjustment must be done in the correct order.

(3) The adjustment must be performed in the circumstance of

25 ºC ± 5 ºC of temperature and 65 % ± 10 % of relative

humidity if there is no specific designation.

(4) The input voltage of the receiver must keep AC 100-240

V~, 50 / 60Hz.

(5) The receiver must be operated for about 5 minutes prior to

the adjustment when module is in the circumstance of over

15.

In case of keeping module is in the circumstance of 0 °C, it

should be placed in the circumstance of above 15 °C for 2

hours

In case of keeping module is in the circumstance of below -

20 °C, it should be placed in the circumstance of above 15

°C for 3 hours.

[Caution]

When still image is displayed for a period of 20 minutes or

longer (especially where W/B scale is strong. Digital pattern

13ch and/or Cross hatch pattern 09ch), there can some

afterimage in the black level area.

3. Automatic Adjustment

3.1. ADC Adjustment

(1) Overview

ADC adjustment is needed to find the optimum black level

and gain in Analog-to-Digital device and to compensate

RGB deviation.

* If Adjust ADC is “OTP”, It doesn’t need ADC adjustment.

(GP3-BCM)

(2) Equipment & Condition

1) Jig (RS-232C protocol)

2) MSPG-925 Series Pattern Generator(MSPG-925FA,

pattern - 65)

- Resolution : 480i Comp1

1080P Comp1

1920*1080 RGB

- Pattern : Horizontal 100% Color Bar Pattern

- Pattern level : 0.7±0.1 Vp-p

- Image

(3) Adjustment

1) Adjustment method

- Using RS-232, adjust items in the other shown in

“3.1.(3).3)”

2) Adj. protocol

Ref.) ADC Adj. RS232C Protocol_Ver1.0

3) Adj. order

- aa 00 00 [Enter ADC adj. mode]

- xb 00 04 [Change input source to Component1(480i&1080p)]

- ad 00 10 [Adjust 480i Comp1]

- xb 00 06 [Change input source to RGB(1024*768)]

- ad 00 10 [Adjust 1024*768 RGB]

- ad 00 90 End adj.

3.2. MAC Address

(1) Equipment & Condition

- Play file: Serial.exe

- MAC Address edit

- Input Start / End MAC address

(2) Download method

1) Communication Prot connection

Connect: PCBA Jig-> RS-232C Port== PC-> RS-232C Port

Protocol Command Set ACK

Enter adj. mode aa 00 00 a 00 OK00x

Source change xb 00 40 b 00 OK40x (Adjust 480i, 1080p Comp1 )

xb 00 60 b 00 OK60x (Adjust 1920*1080 RGB)

Begin adj. ad 00 10

Return adj. result OKx (Case of Success)

NGx (Case of Fail)

Read adj. data (main) (main)

ad 00 20 000000000000000000000000007c007b006dx

(sub) (Sub)

ad 00 21 000000070000000000000000007c00830077x

Confirm adj. ad 00 99 NG 03 00x (Fail)

NG 03 01x (Fail)

NG 03 02x (Fail)

OK 03 03x (Success)

End adj. aa 00 90 a 00 OK90x

PCBA PC(RS-232C)

RS-232C Po rt

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