LG 32LJ600U-ZA Schematic

CONFIDENTIAL

LED TV

SERVICE MANUAL

CHASSIS : LD75K

MODEL : 32LJ600U 32LJ600U-ZA

CAUTION

BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

P/NO : MFL69886201 (1709-REV01)

CONTENTS

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

SAFETY PRECAUTIONS

SERVICING PRECAUTIONS

SPECIFICATION

...................................................................................... 6

SOFTWARE UPDATE

BLOCK DIAGRAM

EXPLODED VIEW

................................................................................. 11

.................................................................................. 17

........................................................................ 3

................................................................... 4

............................................................................. 10

DISASSEMBLY GUIDE .......................................................................... 18

TROUBLE SHOOTING GUIDE ................................................ APPENDIX

- 2 -

SAFETY PRECAUTIONS

IMPORTANT SAFETY NOTICE

Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by in the 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

- 3 -

SERVICING PRECAUTIONS

CAUTION: Before servicing receivers covered by this service manual and its supplements and addenda, read and follow the

SAFETY PRECAUTIONS on page 3 of this publication. NOTE: If unforeseen circumstances create conict between the

following servicing precautions and any of the safety precautions on page 3 of this publication, always follow the safety precautions. Remember: Safety First.

General Servicing Precautions

1. Always unplug the receiver AC power cord from the AC power source before;

a. Removing or reinstalling any component, circuit board

module or any other receiver assembly.

b. Disconnecting or reconnecting any receiver electrical plug

or other electrical connection.

c. Connecting a test substitute in parallel with an electrolytic

capacitor in the receiver. CAUTION: A wrong part substitution or incorrect polarity installation of electrolytic capacitors may result in an explosion hazard.

2. Test high voltage only by measuring it with an appropriate high voltage meter or other voltage measuring device (DVM, FETVOM, etc) equipped with a suitable high voltage probe. Do not test high voltage by "drawing an arc".

3. Do not spray chemicals on or near this receiver or any of its assemblies.

4. Unless specied otherwise in this service manual, clean

electrical contacts only by applying the following mixture to the contacts with a pipe cleaner, cotton-tipped stick or comparable non-abrasive applicator; 10 % (by volume) Acetone and 90 % (by volume) isopropyl alcohol (90 % - 99 % strength)

CAUTION: This is a ammable mixture. Unless specied otherwise in this service manual, lubrication

of contacts in not required.

5. Do not defeat any plug/socket B+ voltage interlocks with which receivers covered by this service manual might be equipped.

6. Do not apply AC power to this instrument and/or any of its electrical assemblies unless all solid-state device heat sinks are correctly installed.

7. Always connect the test receiver ground lead to the receiver chassis ground before connecting the test receiver positive lead. Always remove the test receiver ground lead last.

8. Use with this receiver only the test xtures specied in this

service manual.

CAUTION: Do not connect the test xture ground strap to any

heat sink in this receiver.

Electrostatically Sensitive (ES) Devices

Some semiconductor (solid-state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive (ES) Devices. Examples of typical ES

devices are integrated circuits and some eld-effect transistors

and semiconductor “chip” components. The following techniques should be used to help reduce the incidence of component damage caused by static by static electricity.

1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any electrostatic charge 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 buildup or exposure of the assembly.

3. Use only a grounded-tip soldering iron to solder or unsolder ES devices.

4. Use only an anti-static type solder removal device. Some sol-

der removal devices not classied as “anti-static” can generate electrical charges sufcient to damage ES devices.

5. Do not use freon-propelled chemicals. These can generate

electrical charges sufcient to damage ES devices.

6. Do not remove a replacement ES device from its protective package until immediately before you are ready to install it. (Most replacement ES devices are packaged with leads electrically shorted together by conductive foam, aluminum foil or comparable conductive material).

7. Immediately before removing the protective material from the leads of a replacement ES device, touch the protective material to the chassis or circuit assembly into which the device will be installed. CAUTION: Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.

8. Minimize bodily motions when handling unpackaged replacement ES devices. (Otherwise harmless motion such as the brushing together of your clothes fabric or the lifting of your

foot from a carpeted oor can generate static electricity sufcient to damage an ES device.)

General Soldering Guidelines

1. Use a grounded-tip, low-wattage soldering iron and appropriate tip size and shape that will maintain tip temperature within the range or 500 °F to 600 °F.

2. Use an appropriate gauge of RMA resin-core solder composed of 60 parts tin/40 parts lead.

3. Keep the soldering iron tip clean and well tinned.

4. Thoroughly clean the surfaces to be soldered. Use a mall wirebristle (0.5 inch, or 1.25 cm) brush with a metal handle. Do not use freon-propelled spray-on cleaners.

5. Use the following unsoldering technique

a. Allow the soldering iron tip to reach normal temperature.

(500 °F to 600 °F) b. Heat the component lead until the solder melts. c. Quickly draw the melted solder with an anti-static, suction-

type solder removal device or with solder braid.

CAUTION: Work quickly to avoid overheating the circuit board printed foil.

6. Use the following soldering technique. a. Allow the soldering iron tip to reach a normal temperature

(500 °F to 600 °F)

b. First, hold the soldering iron tip and solder the strand

against the component lead until the solder melts.

c. Quickly move the soldering iron tip to the junction of the

component lead and the printed circuit foil, and hold it there only until the solder ows onto and around both the component lead and the foil. CAUTION: Work quickly to avoid overheating the circuit board printed foil.

d. Closely inspect the solder area and remove any excess or

splashed solder with a small wire-bristle brush.

- 4 -

IC Remove/Replacement

Some chassis circuit boards have slotted holes (oblong) through which the IC leads are inserted and then bent at against the circuit foil. When holes are the slotted type, the following technique should be used to remove and replace the IC. When working with boards using the familiar round hole, use the standard technique as outlined in paragraphs 5 and 6 above.

Removal

1. Desolder and straighten each IC lead in one operation by gently prying up on the lead with the soldering iron tip as the solder melts.

2. Draw away the melted solder with an anti-static suction-type solder removal device (or with solder braid) before removing the IC.

Replacement

1. Carefully insert the replacement IC in the circuit board.

2. Carefully bend each IC lead against the circuit foil pad and solder it.

3. Clean the soldered areas with a small wire-bristle brush. (It is not necessary to reapply acrylic coating to the areas).

"Small-Signal" Discrete Transistor Removal/Replacement

1. Remove the defective transistor by clipping its leads as close as possible to the component body.

2. Bend into a "U" shape the end of each of three leads remaining on the circuit board.

3. Bend into a "U" shape the replacement transistor leads.

4. Connect the replacement transistor leads to the corresponding leads extending from the circuit board and crimp the "U" with long nose pliers to insure metal to metal contact then solder each connection.

Power Output, Transistor Device Removal/Replacement

1. Heat and remove all solder from around the transistor leads.

2. Remove the heat sink mounting screw (if so equipped).

3. Carefully remove the transistor from the heat sink of the circuit board.

4. Insert new transistor in the circuit board.

5. Solder each transistor lead, and clip off excess lead.

6. Replace heat sink.

Diode Removal/Replacement

1. Remove defective diode by clipping its leads as close as possible to diode body.

2. Bend the two remaining leads perpendicular y to the circuit board.

3. Observing diode polarity, wrap each lead of the new diode around the corresponding lead on the circuit board.

4. Securely crimp each connection and solder it.

5. Inspect (on the circuit board copper side) the solder joints of the two "original" leads. If they are not shiny, reheat them and if necessary, apply additional solder.

3. Solder the connections. CAUTION: Maintain original spacing between the replaced component and adjacent components and the circuit board to prevent excessive component temperatures.

Circuit Board Foil Repair

Excessive heat applied to the copper foil of any printed circuit board will weaken the adhesive that bonds the foil to the circuit board causing the foil to separate from or "lift-off" the board. The following guidelines and procedures should be followed whenever this condition is encountered.

At IC Connections

To repair a defective copper pattern at IC connections use the following procedure to install a jumper wire on the copper pattern side of the circuit board. (Use this technique only on IC connections).

1. Carefully remove the damaged copper pattern with a sharp knife. (Remove only as much copper as absolutely necessary).

2. carefully scratch away the solder resist and acrylic coating (if used) from the end of the remaining copper pattern.

3. Bend a small "U" in one end of a small gauge jumper wire and carefully crimp it around the IC pin. Solder the IC connection.

4. Route the jumper wire along the path of the out-away copper pattern and let it overlap the previously scraped end of the good copper pattern. Solder the overlapped area and clip off any excess jumper wire.

At Other Connections

Use the following technique to repair the defective copper pattern at connections other than IC Pins. This technique involves the installation of a jumper wire on the component side of the circuit board.

1. Remove the defective copper pattern with a sharp knife. Remove at least 1/4 inch of copper, to ensure that a hazardous condition will not exist if the jumper wire opens.

2. Trace along the copper pattern from both sides of the pattern break and locate the nearest component that is directly connected to the affected copper pattern.

3. Connect insulated 20-gauge jumper wire from the lead of the nearest component on one side of the pattern break to the lead of the nearest component on the other side. Carefully crimp and solder the connections. CAUTION: Be sure the insulated jumper wire is dressed so the it does not touch components or sharp edges.

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.

- 5 -

SPECIFICATION

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

.

1. Application range

This specification is applied to the LED TV used LD75H chassis.

3. Test method

(1) Performance: LGE TV test method followed (2) Demanded other specification

- Safety : CE, IEC specification

- EMC : CE, IEC

2. Requirement for Test

Each part is tested as below without special notice. (1) Temperature : 25°C ± 5°C (77°C ± 9°C), CST : 40°C ± 5°C (2) Relative Humidity : 65 % ± 10 % (3) Power Voltage : Standard input voltage (AC100~240V @ 50/60Hz) Standard Voltage of each product 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

4. Model General Specification

No. Item Specication Remarks

DTV & Analog (Total 37 countries)

DTV (MPEG2/4, DVB-T) : 26 countries

Germany, Netherland, Switzerland, Hungary, Austria, Slovenia, Bulgaria, France, Spain, , Belgium, Luxemburg, Greece, Czech, Turkey, Moroco, Ireland, Latvia, Estonia, Lithuania, Poland, Portugal, Romania, Albania, Bosnia, Slovakia, Beralus

1 Market EU(PAL Market-37Countries)

DTV (MPEG2/4, DVB-T2) :11 countries

UK(Ireland), Sweden, Denmark, Finland, Norway, Ukraine, Kazakhstan Russia, Italy, Croatia, Serbia

DTV (MPEG2/4, DVB-C) : 37 countries

Germany, Netherland, Switzerland, Hungary, Austria, Slovenia, Bulgaria, France, Spain, Italy, Belgium, Russia, Luxemburg, Greece, Czech, Croatia, Turkey, Moroco, Ireland, Latvia, Estonia, Lithuania, Poland, Portugal, Romania, Albania, Bosnia, Serbia, Slovakia, Beralus, UK, Sweden, Denmark, Finland, Norway, Ukraine, Kazakhstan

DTV (MPEG2/4,DVB-S) : 37 countries

Germany, Netherland, Switzerland, Hungary, Austria, Slovenia, Bulgaria, France, Spain,Belgium, Luxemburg, Greece, Czech, Turkey, Moroco, Ireland, Latvia, Estonia, Lithuania, Poland, Portugal, Romania, Albania, Bosnia, Slovakia, Beralus, UK(Ireland), Sweden, Denmark, Finland, Norway, Ukraine, Kazakhstan,Russia, Italy, Croatia, Serbia

Supported satellite : 35 satellites

ABS1 75.0E , AMOS 4.0W , ASIASAT3S 105.5E , ASTRA 19.2E , ASTRA 23.5E , ASTRA 28.2E , ASTRA 4.8E, ATLANTIC BIRD2 8.0W , ATLANTIC BIRD3 5.0W , BADR 26.0E , DIRECTV-1R 56.0E , EUROBIRD 9A 9.0E , EUROBIRD3 33.0E , EUTELSAT 36 A/B 36.0E , EUTELSAT W2A 10.0E , EUTELSAT W3A 7.0E , EUTELSAT7WA 7.3W EUTELSAT 16.0E , EXPRESS AM1 40.0E , EXPRESS AM3 140.0E , EXPRESS AM33 96.5E , HELLASSAT 39.0E , HISPASAT 1CDE 30.0W HOTBIRD 13.0E , INTELSAT10&7 68.5E , INTELSAT15 85.2E , INTELSAT1R 50.0W, INTELSAT903 33.5W , INTELSAT904 60.0E, NILESAT 7.0W , NSS12 57.0E , THOR 0.8W , TURKSAT 42.0E , YAMAL201 90.0E , OTHER

- 6 -

No. Item Specication Remarks

1) Digital TV

- DVB-T/T2

- DVB-C

2 Television system

3 Program coverage

4 Receiving system

5 SCART (N/A) DELETED

6 Video Input RCA (1EA) PAL, SECAM, NTSC4.43 4 System :PAL, SECAM, NTSC4.43, PAL60, Hybrid Type

7 Head phone out

8 Component Input (1EA)

9 HDMI Input (3EA)

10 Audio Input (3EA)

11 SPDIF out SPDIF out

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

13 Ethernet Connect (1EA) Ethernet Connect

14 PCMCIA Card slot (1EA) PCMCIA slot

- DVB-S/S2

2) Analogue TV

- PAL/SECAM B/G/I/D/K

- SECAM L/L’

1) Digital TV

- VHF, UHF

- C-Band, Ku-Band

2) Analogue TV

- VHF : E2 to E12

- UHF : E21 to E69

- CATV : S1 to S20

- HYPER : S21 to S47

Analog : Upper Heterodyne Digital : COFDM, QAM

Antenna, AV, Component, HDMI1, HDMI2, USB1, USB2

Y/Cb/Cr Y/Pb/Pr

HDMI1-DTV HDMI2-DTV HDMI3-DTV

DVI Audio Component AV

► DVB-T

- 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

► DVB-T2 (Model : *L*V*-Z* (T2 only Model))

- 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

► DVB-C

- Symbolrate :

4.0Msymbols/s to 7.2Msymbols/s

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

► DVB-S/S2

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

- viterbi DVB-S mode : 1/2, 2/3, 3/4, 5/6, 7/8 DVB-S2 mode : 1/2, 2/3, 3/4, 3/5, 4/5, 5/6, 8/9, 9/10

Hybrid Type

L/R Input

- 7 -

5. External Input Support format

5.1. Video resolutions (2D)

(1) Component Video Input (Y, PB, PR)

No.

1 720*480 15.73 60.00 SDTV, DVD 480i

2 720*480 15.73 59.94 SDTV, DVD 480i

3 720*480 31.47 59.94 480p

4 720*480 31.50 60.00 480p

5 720*576 15.62 50.00 SDTV, DVD 625 Line

6 720*576 31.25 50.00 HDTV 576p

7 1280*720 37.50 50.00 HDTV 720p

8 1280*720 44.96 59.94 HDTV 720p

9 1280*720 45.00 60.00 HDTV 720p

10 1920*1080 28.12 50.00 HDTV 1080i

11 1920*1080 33.75 60.00 HDTV 1080i

12 1920*1080 33.72 59.94 HDTV 1080i

13 1920*1080 56.25 50.00 HDTV 1080p

14 1920*1080 67.50 60.00 HDTV 1080p

(2) HDMI Input (DTV)

No. Resolution H-freq (kHz) V-freq (kHz) Proposed Remarks

1 640*480 31.46 59.94 SDTV 480P

2 640*480 31.50 60.00 SDTV 480P

3 720*480 15.73 59.94 SDTV, DVD 480I(525I)

5 720*576 15.62 50.00 SDTV, DVD 576I(625I) 50Hz

6 720*480 31.47 59.94 SDTV 480P

7 720*480 31.50 60.00 SDTV 480P

8 720*576 31.25 50.00 SDTV 576P

9 1280*720 44.96 59.94 HDTV 720P

10 1280*720 45.00 60.00 HDTV 720P

11 1280*720 37.50 50.00 HDTV 720P

12 1920*1080 28.12 50.00 HDTV 1080I

13 1920*1080 33.72 59.94 HDTV 1080I

14 1920*1080 33.75 60.00 HDTV 1080I

15 1920*1080 26.97 23.97 HDTV 1080P

16 1920*1080 27.00 24.00 HDTV 1080P

17 1920*1080 33.71 29.97 HDTV 1080P

18 1920*1080 33.75 30.00 HDTV 1080P

19 1920*1080 56.25 50.00 HDTV 1080P

20 1920*1080 67.43 59.94 HDTV 1080P

21 1920*1080 67.50 60.00 HDTV 1080P

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

Specication

Spec. out but display4 720*480 15.75 60.00 SDTV, DVD 480I(525I)

- 8 -

(3) HDMI Input (PC)

No. Resolution H-freq (kHz) V-freq (Hz) Proposed Remarks

1 640 x 350 @70Hz 31.46 70.09 EGA

2 720 x 400 @70Hz 31.46 70.08 DOS

3 640 x 480 @60Hz 31.46 59.94 VESA(VGA)

4 800 x 600 @60Hz 37.87 60.31 VESA(SVGA)

5 1024 x 768 @60Hz 48.36 60.00 VESA(XGA)

6 1152 x 864 @60Hz 54.34 60.05 VESA

7 1280 x 1024 @60Hz 63.98 60.02 VESA(SXGA) FHD only

8 1360 x 768 @60Hz 47.71 60.01 VESA(WXGA)

9 1920 x 1080 @60Hz 67.50 60.00 WUXGA(CEA 861D) FHD only

- 9 -

SOFTWARE UPDATE

1. USB

(1) Insert the USB memory Stick to the USB port. (2) Automatically detect the SW Version and show the below

message

(3) Click [YES]: initiate the download and install of the update.

(4) Click [Check Now]: move to “About This TV” page for

update.

(5) TV is updating.

2. NSU

(1) Menu -> All Settings -> General -> About This TV

(2) Click [CHEK FOR UPDATES] : system check newest

version

(3) Click [DOWNLOAD AND INSTALL] (4) TV is updating

(6) After finished the update, below Pop-up appear.

(7) Click [Yes] : TV will be DC OFF -> ON (8) After TV turned on, Check the updated SW Version and

Tool Option.

- 10 -

(5) After finished the update, below Pop-up appear

(6) Turn OFF the TV and On. Check the updated SW Version

and Tool Option

M2R

(Embedded)

Audio AMP

Digital Demod

IF (+/-)

Sub Micom

(R5F100GEAFB)

IR / KEY / Sensor

IR

KEY

I2C

HDMI

MUX

LVDS

USB

SPDIF OUT

ETHERNET

USB1

USB2

OCP

1.5A

OCP

1.5A

HDMI1

HDMI2

(ARC)

REAR

OPTIC

LAN

51P

DDR3 2133 4Gb x16

X_TAL

24MHz

WIFI / BTcombo

SUB

ASSY

USB_WIFI

CI slot

P_TS

Tuner

DDR3 2133 4Gb x16

HDMI2

SIDE

CVBS/YPbPr

H/P

AV/COMP

REAR

EEPROM (256Kb)

eMMC 5.1 (4GB)

I2S

I2C

Analog Demod

1. Main SOC Block Diagram

BLOCK DIAGRAM

- 11 -

MAIN

SOC

IP_T

IM_T

AN31 [DMD_ADC_INP]

AN32 [DMD_ADC_INN]

TUNER

SIF 6

IF N 7

IF P 8

LNB 26

[SCL_RF] 1

CVBS 4

IF AGC 5

I_P_TU 59

I_N_TU 60

Q_N_TU 61

Q_P_TU 62

IF_N/IF_P

I2C_SCL5

I2C_SDA5

33 ȳ

IF_AGC

I_P_Soc

I_N_Soc

Q_P_Soc

Q_N_Soc

AL31[IF_AG C]

[SDL_RF] 2

3.3V_RF 3

+3.3V_TUNER

1.2Kȳ

33 ȳ

TPO_DATA[0-7] CI_IN_TS_DATA[0-7]

CI Slot

100 ȳ

TPI_DATA [0-7] CI_TS_DATA[0-7]

/PCM_WE

/PCM_OE

/PCM_IRQA

/PCM_REG

PCM_INPACK

/PCM_WAIT

PCM_RESET

CI_TS_DATA[0-7]

CI_ADDR[0-14]

/PCM_IORD

/PCM_IOWR

/PCM_CE1.2

CI_TS_VAL

/CI_CD1,2

CI 5V

Power detect

PCM_5V_CTL

+5V_CI_ON

CI_IN_TS_SYNC

CI_IN_TS_VAL

CI_IN_TS_CLK

[TPO_DATA[ 0~7] CI_MDI[0-7]

[TPI_DATA 0~7] TPI_DATA[0-7]

/CI_CD1,2

C23[CAM_CD1_N]

B23[CAM_CD2_N]

CI_TS_VAL G28[TPI_VAL]

B25[CAM_CE1_N]

B26[CAM_CE2_N]

/PCM_CE1.2

10K ȳ

B29 [EB_BE_N1]

E28 [EB_EB_N0]

/PCM_IOWR

/PCM_IORD

[EB_ADDR_0~14]

[EB_DATA_0~7]

CI_ADDR[0-14]

CI_DAT[0-7]

A24[CAM_RESET]

C24[CAM_WAIT_N]

A25[CAM_REG_N]

B24[CAM_IREQ_N]

A32 [EB_OE_N]

D28 [EB_WE_N]

P30 [TPO_CLK]

P29 [TPO_VAL]

N29 [TPO_SOP]

CI_IN_TS_CLK

CI_IN_TS_VAL

CI_IN_TS_SYNC

PCM_RESET

/PCM_WAIT

PCM_INPACK

/PCM_REG

/PCM_IRQA

/PCM_OE

/PCM_WE

VCC

C25 [CAM_VCCEN_N]

+5V_CI_ON +3.3V_NORMAL

47K ȳ

GND 27

IF_AGC_SAT 58

I2C_SCL_2

I2C_SDA_2

+3.3V_RF

+3.3V_Tu

CVBS

SIF_P

IC6900

IF_AGC_S_Soc

FILTER

LNB_Out

2. Tuner + CI

- 12 -

MAIN SOC

AM24 [CVBS_IN2]

AV_CVBS_IN

AV1

Phone JACK

AV1_CVBS_IN_SOC

AM20 [SOY1_IN]

AN20 [Y1_IN]

AL21 [PB1_IN]

AM22 [PR1_IN]

COMP2_SOG2_IN_SOC

COMP2_Y_IN_SOC

COMP2_Pb_IN_SOC

COMP2_Pr_IN_SOC

A

V1

Jack Side SOC Side

SPDIF_OUT

SPDIF OUT

H/P JACK

HP_LOUT_JACK HP_ROUT_JAC

K

AM14 [IEC958OUT]

AL15 [AUDA_OUTL]

AM15 [AUDA_ OUTR]

SPDIF_OUT_ARC

[PHY0_ARC_ OUT]

COMP2/AV_L_IN

COMP2/AV_R_IN

AL18 [AUAD_L_CH2_IN

AM18 [AUAD_R_CH2_IN]

AUAD_L_CH2_IN

AUAD_R_CH2_IN

ARC OUT

(HDMI1)

Front Speaker

MICOM

AMP_RESET

[SCK]

[LRCK]

[DACLRCH]

[I2C_SCL_0/SDA_0]

I2S

[GPIO23]

Audio AMP

DTA2010M

(싵쟴젎싵 Only)

3. Video & Audio IN/OUT

- 13 -

MICOM

HDCP1.4

MAIN SOC

HDMI 2

(1.4)_H

HDMI 1

(1.4)_V

ARC

CEC_REMOTE

Port_2

DDC_I2C_2

SPDIF_OUT_ARC

HDMI_HPD_2

CEC_REMOTE

Port_1

DDC_I2C_1

HDMI_HPD_1

HDMI2.0

LGE PHY

HDCP1.4

HDMI1.4

LGE PHY

+5V

HDCP1.4

HDMI 3

(1.4)_H

CEC_REMOTE

Port_3

DDC_I2C_3

HDMI_HPD_3

HDMI2.0

LGE PHY

+5V

[HDMI3_HPD]

[HDMI3_SDA]

[HDMI3_SCL]

[HDMI2_HPD]

[HDMI2_SDA]

[HDMI2_SCL]

[HDMI2_HPD]

[HDMI2_SDA]

[HDMI2_SCL]

[PHY0_ARC_OUT]

4. HDMI 1.4

- 14 -

IR + Wi-Fi

Wafer 25P

[UART0_RXD/GPIO106]

USB2.0_1_TX_DP0 / DM0

USB2.0_1_RX_DP0 / DM0

USB2.0_1_DP0 / DM0

RS232 IC

WIFI_DP / DM

MICOM

WOL/WIFI_POWER_ON

[USB2_2_DP0 / DM0]

SOC_RX/TX

[USB2.0_2_DP0 / DM0]

[USB2.0_1_DP0 / DM0]

USB2.0_2_DP1 / DM1

[UART1_RXD / TXD]

Debug Wafer

UART1_RX/TX

SOC_RX/TX

UART wafer

SOC_RX/TX

USB 1

(2.0)_H

USB 2

(2.0)_H

WIFI_EN

+3.5V_WIFI

OCP

USB_CTL1

+5V_USB_1

OCP

USB_CTL2

+5V_USB_2

[UART0_TXD/GPIO105]

MAN SOC

5. USB / Wi-Fi / M-Remote / UART

- 15 -

+3.3V_NORMAL

ZUZr˟

NVRAM

ZUZr˟

+3.3V_NORMAL

ZZ˟

+3.3V_NORMAL

ZUZr˟

AUDIO AMP(IC5600)

XWWG˟

TUNER (Demod)

YU^r˟

+3.3V_TU

ZZ˟

MAIN SOC

MICOM

ZZ˟ LNB

IR / KEY/EYE

XWW˟

ZUZr˟

EYE_I2C_SDA

EYE_I2C_SCL

+3.5V_ST

33pF

18pF

I2C_SCL4: AJ21[SCL4]

I2C_SDA4: AH21[SDA4]

I2C_SCL1: AK22[SCL1]

I2C_SDA1: AJ22[SDA1]

I2C_SCL3: AH24[SCL3]

I2C_SDA3: AJ24[SDA3]

I2C_SCL0: AK23[SCL0]

I2C_SDA0: AJ23[SDA0]

I2C_SCL2: AH23[SCL2]

I2C_SDA2: AH22[SDA2]

I2C_SCL5: AH25[SCL5]

I2C_SDA5: AH26[SDA5]

Tuner

XUYr˟GOl|P

+3.3V_TU

ZZ˟

47pF

AUDIO AMP(IC5600)

XWWG˟

33pF

ZZG˟

6. I2C Map

- 16 -

901

200

400

540

500

120

LV1

A10

720

700

Set + Stand

902

AR1

ARC1

571

570

800

200A

EXPLODED VIEW

IMPORTANT SAFETY NOTICE

Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by in the 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.

- 17 -

DISASSEMBLY GUIDE

1. Disassembly of Back cover

(1) Remove screw in the set (2) Check both right/left hole

(3) Attach tape to ‘Long nose pliers’

(5) Open B/C with push/pulling long nose to upper and lower sides.

(4) Put ‘long nose’ into the hole

(6) Disassemble Back cover

* Disassemble it from left to right for top side hook on

Back cover

- 18 -

2. Back cover hole size & Long nose spec

Y

V

:PP

B/C Hole size

- w : 4.6 mm

- t : 3.5 mm

Tool spec

- Long nose pliers

- Needle nose pliers

Y

V

WPP

- 19 -

TROUBLE SHOOTING GUIDE

Contents of Standard Repair Process

No. Error symptom (High category) Error symptom (Mid category) Page Remarks

1

2 No video/No audio 2

3 Picture broken/ Freezing 3

4 Color error 4

5

6

7

8

9 Wrecked audio/discontinuation/noise 9

10

11 Wifi operating checking 11

A. Video error

B. Power error

C. Audio error

D. Function error

No video/Normal audio 1

Vertical/Horizontal bar, residual image, light spot, external device color error

No power 6

Off when on, off while viewing, power

auto on/off

No audio/Normal video 8

Remote control & Local switch checking

5

7

10

12 External device recognition error 12

13 E. Noise Circuit noise, mechanical noise 13

14 F. Exterior error Exterior defect 14

First of all, Check whether there is SVC Bulletin in GSCS System for these model.

Error

A. Video error

Established

date

symptom

Video X / Audio O

Revised date

First of all, Check whether all of cables between board is inserted properly or not.

(Main B/D↔ Adapter, LVDS Cable, Speaker Cable, IR B/D Cable…)

☞A9 ☞A1

Video X / Audio O

Audio O

N

Move to No Video / No Audio Channel

Check

Y

Back Light On with Naked eyes

☞A9

On

N

Check Adapter 19V output

Y

Check Adapter 19V

Normal

Voltage

Repair or Replace Adapter or parts

Y

N

Replace T-con /Main B/D or Module

1/14

※Precaution

Always check & record S/W Version and White Balance value before replace the Main B/D

☞A4 & A2

Normal

Voltage

N

Repair Adapter or parts

Replace Main B/D

Y

Replace Inverter or Module

End

Re-enter White Balance value

1

symptom

Video X / Audio X

Error

☞A9

Check Adapter 19V output

A. Video error

Video X / Audio X

Normal

Voltage

Y

Check and Replace Main B/D

Established

date

Revised date

2/14

N

Repair or Replace

Adapter or parts

End

2

Error

symptom

A. Video error

Picture broken / Freezing

Established

date

Revised date

3/14

☞ A3

Check RF Signal level

Normal Signal?

N

Check RF Cable

Connection

1. Reconnection

2. Install Booster

Normal

Picture?

Y

Close

Y

N

. By using Digital signal level meter . By using Diagnostics menu on OSD

( All Settings → Programmes → Programmes Tuning &Settings → Manual Tuning → Check the Signal )

- Signal strength (Normal : over 50%)

- Signal Quality (Normal: over 50%)

Check whether other equipments have problem or not.

(By connecting RF Cable at other equipment)

→ DVD Player ,Set-Top-Box, Different maker TV etc`

☞ A4

Normal

Picture?

N

Contact with signal distributor

or broadcaster (Cable or Air)

Y

S/W Version

Check

SVC

Bulletin?

Y

S/W Upgrade

Normal

Picture?

Y

N

Check

Tuner soldering

N

Replace

Main B/D

Y

Close

3

Error

symptom

A. Video error

Color error

Established

date

Revised date

4/14

☞A6

Check color by input

-External Input

-COMPONENT

-AV

-HDMI

Color

error?

Check error color input mode

Y

N

External Input/

☞ A7

※ Check the V

x1 or EPI Cable and Connector

And Replace Link Cable

Component

error

HDMI

error

Color

error?

N

Check external device and cable

Check external

device and cable

Y

Replace Main B/D

External device

Request repair

for external

device/cable

External device

/Cable

normal

N

/Cable

normal

Color

error?

End

Y

Replace module Or T-Con B/D

N

Replace Main/T-con B/D

4

Error

symptom

A. Video error

Vertical / Horizontal bar, residual image, light spot, external device color error

Established

date

Revised date

5/14

Vertical/Horizontal bar, residual image, light spot

☞A6

Check the color

- External input

- Component

- HDMI

Screen normal

Replace Module

N

Y

Check the connection of external device

Normal

N

Repair Request

External Device

External device screen error-Color error

External

Input

error

Component

error

HDMI/

DVI

Check S/W Version

Check

version

Y

S/W Upgrade

Normal

screen?

Y

End

N

Check screen condition by input

-External Input

-Component

-HDMI/DVI

N

☞ A7

Y

Change Cable

Screen normal

End

N

Y

Connect other external device and cable

(Check normal operation of External Input, Component, RGB and HDMI/DVI by connecting Jig, pattern Generator ,Set-top Box etc.

- Connect other external

device and cable (Check normal operation of External Input, Component, RGB and HDMI/DVI by connecting Jig, pattern Generator ,Set-top Box etc.

- HDMI ULTRA HD Deep Color menu off

Replace Main B/D

Screen

normal?

Y

Request repair for

external device

Y

Screen

normal?

ReplaceModule

Replace

N

Main/T-con

B/D

Replace

N

Main /T-con B/D

N

Screen normal

Y

End

5

Check outlet

Check A/C cord

Error

symptom

Error?

B. Power error

Off when on, off while viewing, power auto on/off

☞A10

N

Check Power Off Mode

CPU

Abnormal

Established

date

Revised date

Replace Main B/D

Normal?

7/14

Y

End

Check for all 3- phase power out

* Please refer to the all cases which

can be displayed on power off mode.

Y

Fix A/C cord & Outlet and check each 3 phase out

Abnormal

1

Replace Adapter

☞A9

(If Power Off mode is not displayed) Check Adapter voltage

※ Caution

Check and fix exterior of Power B/D Part

Status Power off List Explanation

"POWEROFF_REMOTEKEY" Power off by REMOTE CONTROL

"POWEROFF_OFFTIMER" Power off by OFF TIMER

"POWEROFF_SLEEPTIMER" Power off by SLEEP TIMER "POWEROFF_INSTOP" Power off by INSTOP KEY "POWEROFF_AUTOOFF" Power off by AUTO OFF

Normal

Abnormal

"POWEROFF_ONTIMER" Power off by ON TIMER "POWEROFF_20V_DET" Power off by AC OFF "POWEROFF_RESREC" Power off by Reservated Record "POWEROFF_RECEND" Power off by End of Recording "POWEROFF_SWDOWN" Power off by S/W Download

"POWEROFF_UNKNOWN" Power off by unknown status except listed case

"POWEROFF_ABNORMAL1" Power off by abnormal status except CPU trouble "POWEROFF_CPUABNORMAL" Power off by CPU Abnormal

Normal

voltage?

Replace Adapter

N

Y

Replace Main B/D

N

7

No audio

Screen normal

Error

C. Audio Error

symptom

Audio X / Video O

☞A11 ☞A12+A9

Check menu > Sound Out set CORRECT output

Correct

N

Check audio B+ 19V

Y

of Adapter

Established

date

Revised date

Normal voltage

N

8/14

Y

Set correct output

Check Speaker disconnection

Replace Adapter and repair parts

Y

Replace Speaker

N

Replace MAIN Board

End Disconnection

8

Error

symptom

C. Audio Error

Wrecked audio/ discontinuation/noise

Established

date

Revised date

 abnormal audio/discontinuation/noise is same after “Check input signal” compared to No audio

9/14

Check input signal

-RF

-External Input signal

Signal

normal?

N

Y

(When RF signal is not received) Request repair to external

cable/ANT provider

(In case of External Input signal error)

Check and fix

external device

Wrecked audio/

Discontinuation/

Noise for

all audio

Wrecked audio/

Discontinuation/

Noise only

for D-TV

Wrecked audio/

Discontinuation/

Noise only

for Analog

Wrecked audio/

Discontinuation/

Noise only

for External Input

Check and replace speaker and connector

Replace Main B/D

Connect and check

other external device

☞A12+A9

Check audio B+ Voltage (19V)

Normal

voltage?

Replace Adapter

Replace Main B/D

Normal

audio?

N

Y

N

End

Check and fix external device

9

Error

symptom

D. Function Error

Remote control & Local switch checking

Established

date

Revised date

10/14

1. Remote control(R/C) operating error

Check & Repair

Check R/C itself

Operation

Check R/C Operating

When turn off light

in room

If R/C operate, Explain the customer cause is interference

from light in room.

Normal

operating?

Y

Cable connection Connector solder

N

Check & Replace

Baterry of R/C

Normal

operating?

N

Replace R/C

Y

Close

Normal

operating?

Y

Close

☞A13

Check Stan-by

N

Voltage On

Main B/D

☞A9

Replace Power B/D or Replace Main B/D

☞A13 ☞A13

N

Y

Check IR

Output signal

Normal

Voltage?

Check Stan-by voltage on Power B/D

Replace

Main B/D

Normal

Signal?

N

Repair/Replace

IR B/D

Y

10

Error

symptom

2.Wifi operating error

D. Function Error

Wi-Fi operating checking

Established

date

Revised date

11/14

Check the

INSTART menu

☞A4

Wi-Fi Mac value

is “NG”?

☞A15

Check & Repair

Wifi cable

connection

☞A4

Wi-Fi Mac value

is “NG”?

Change the Wifi

Y

assy

N

☞A15

Check the Wi-Fi

Wafer pin

Close

Normal

Voltage?

Y

Close

N

Replace

Main B/D

11

Error

symptom

D. Function Error

External device recognition error

Established

date

Revised date

12/14

Check input signal

Signal

input?

Y

N

Check and fix

external device/cable

Check technical information

- Fix information

- S/W Version

Technical

information?

Y

Fix in

accordance

with technical

information

External Input and

N

Component

Recognition error

DVI, Optical

Recognition error

Replace Main B/D

HDMI/

Replace Main B/D

12

Error

symptom

E. Noise

Circuit noise, mechanical noise

Established

date

Revised date

13/14

Identify noise type

Circuit

noise

Mechanical

noise

※ Mechanical noise is a natural phenomenon, and apply the 1st level description. When the customer does not agree, apply the process by stage. ※ Describe the basis of the description in “Part related to nose” in the Owner’s Manual.

Check location of noise

Replace PSU

※ When the nose is severe, replace the module (For models with fix information, upgrade the S/W or provide the description)

OR

※ If there is a “Tak Tak” noise from the cabinet, refer to the KMS fix information and then proceed as shown in the solution manual (For models without any fix information, provide the description)

13

Error

symptom

F. Exterior defect

Exterior defect

Established

date

Revised date

14/14

Zoom part with exterior damage

Module

damage

Cabinet

damage

Remote

control

damage

Stand

dent

Replace module

Replace cabinet

Replace remote control

Replace stand

14

Contents of Standard Repair Process Detail Technical Manual

No. Error symptom Content Page Remarks

A. Video error_ No video/Normal

1

audio

Check White Balance value A2

2

A. Video error_ video error /Video lag/stop

3 Version checking method A4

4 Tuner Checking Part A5

A. Video error _Vertical/Horizontal bar,

5

residual image, light spot

6

A. Video error_ Color error

7 Adjustment Test pattern - ADJ Key A8

8

9 Exchange Main Board (2) A-2/5

10 Exchange Power Board (PSU) A-3/5

Defected Type caused by T-Con/ Inverter/ Module

11 Exchange Module (1) A-4/5

12 Exchange Module (2) A-5/5

TUNER input signal strength checking method

Connection diagram A6

Check Link Cable (EPI) reconnection condition

Exchange Main Board (1) A-1/5

A3

A7

Continue to the next page

Contents of Standard Repair Process Detail Technical Manual

Continued from previous page

No. Error symptom Content Page Remarks

13

B. Power error_ No power

14 Check power input Voltage & ST-BY 3.5V A10

15

16

17

18

19

20 Wifi operation checking method A15

B. Power error_Off when on, off while viewing

C. Audio error_ No audio/Normal

video

D. Function error

Check front display LED A9

POWER OFF MODE checking method A11

Checking method in menu when there is no audio

Voltage and speaker checking method when there is no audio

Remote control operation checking method

Motion Remote operation checking method

A12

A13

A14

A15

Standard Repair Process Detail Technical Manual

Error

symptom

Content

A. Video error_No video/Normal audio

Check White Balance value

Established

date

Revised

date

A2

Entry method

1. Press the ADJ button on the remote control for adjustment.

2. Enter into White Balance menu.

3. After recording the R, G, B (GAIN, Cut) value of Color Temp (Cool/Medium/Warm), re-enter the value after replacing the MAIN BOARD.

A2

Standard Repair Process Detail Technical Manual

Error

symptom

Content

A. Video error_Video error, video lag/stop

TUNER input signal strength checking method

Established

date

Revised

date

Advanced Channels  Channel Tuning Manual Tuning

A3

When the signal is strong,

use the attenuator (-10dB, -

15dB, -20dB etc.)

A3

Standard Repair Process Detail Technical Manual

Error

symptom

Content

A. Video error_Video error, video lag/stop

Version checking method

Established

date

Revised

date

A4

1. Checking method for remote control for adjustment

Version

v

Press the IN-START with the remote control for adjustment

A4

Standard Repair Process Detail Technical Manual

Error

symptom

Content

A. Video error_Video error, video lag/stop

TUNER checking part

Established

date

Revised

date

A5

Checking method:

1. Check the signal strength or check whether the screen is normal when the external device is connected.

2. After measuring each voltage from power supply, finally replace the MAIN BOARD.

A5

Standard Repair Process Detail Technical Manual

Error

symptom

Content

A. Video error _Vertical/Horizontal bar,

residual image, light spot

Connection diagram (1)

Established

date

Revised

date

A6

As the part connecting to the external input, check the screen condition by signal

A6

Standard Repair Process Detail Technical Manual

Error

symptom

Content

Check Link Cable(VX1) reconnection condition

A. Video error_Color error

Established

date

Revised

date

A7

Check the contact condition of the Link Cable, especially dust or mis insertion.

A7

Standard Repair Process Detail Technical Manual

Error

symptom

Content

A. Video error_Color error

Adjustment Test pattern - ADJ Key

Established

date

Revised

date

A8

You can view 6 types of patterns using the ADJ Key

Checking item : 1. Defective pixel 2. Residual image 3. MODULE error (ADD-BAR,SCAN BAR..)

4.Video error (Classification of MODULE or Main-B/D!)

A8

Appendix : Exchange Main Board (1)

Solder defect, CNT Broken

T-Con Defect, CNT Broken

Solder defect, CNT Broken

T-Con Defect, CNT Broken

Solder defect, CNT Broken

Abnormal Power Section

Solder defect, Short/Crack

Abnormal Power Section Solder defect, Short/Crack

A - 1/5

Appendix : Exchange Main Board (2)

Abnormal Power Section

Solder defect, Short/Crack

Abnormal Power Section

Fuse Open, Abnormal power section

Solder defect, Short/Crack

Abnormal Display

GRADATION

Noise

A - 2/5

GRADATION

Appendix : Exchange Power Board (PSU)

No Light

Dim Light

No picture/Sound Ok

A - 3/5

Appendix : Exchange the Module (1)

Press damage Press damage

Crosstalk Crosstalk

Press damage

Un-repairable Cases In this case please exchange the module.

A - 4/5

Appendix : Exchange the Module (2)

Vertical Block

Source TAB IC Defect

Horizontal Block

Gate TAB IC Defect

Vertical Line

Source TAB IC Defect

Horizontal Block

Gate TAB IC Defect

Vertical Block

Source TAB IC Defect

Horizontal line Gate TAB IC Defect Gate TAB IC Defect

Un-repairable Cases In this case please exchange the module.

Horizontal Block

Gate TAB IC Defect

A - 5/5

Standard Repair Process Detail Technical Manual

Error

symptom

Content

B. Power error _No power

Check front Power Indicator

Established

date

Revised

date

A9

ST-BY condition: On or Off Power ON condition: Turn Off

A9

Standard Repair Process Detail Technical Manual

Error

symptom

Content

B. Power error _No power

Check power input voltage and ST-BY 3.5V

Check the DC 13.2V.

Established

date

Revised

date

A10

Standard Repair Process Detail Technical Manual

Error

symptom

Content

B. Power error _Off when on, off whiling viewing

POWER OFF MODE checking method

Established

date

Revised

date

A11

Entry method

1. Press the IN-START button of the remote control for adjustment

2. Check the entry into adjustment item 3

A11

Standard Repair Process Detail Technical Manual

Error

symptom

Content

C. Audio error_No audio/Normal video

Checking method in menu when there is no audio

Established

date

Revised

date

A12

Checking method

1. Press the Setting button on the remote control

2. Select the Sound function of the Menu

3. Select the Sound Out

4. Select TV Speaker

A12

Standard Repair Process Detail Technical Manual

1

SPK_R-

2

SPK_R+

3

SPK_L-

4

SPK_L+

Error

symptom

Content

<32LJ600U-ZA>

C. Audio error_No audio/Normal video

Voltage and speaker checking method when there is no audio

①

②

Established

date

Revised

date

A13

Checking methond when no audio

① Check Main B/D 19V

② Swap Adapter and check normal status.

After connect speaker and contact the output terminal of the speaker with GND, if there is sound ouput

noise, we conclude the speaker works well.

A13

Standard Repair Process Detail Technical Manual

Pin name

1

3.4V_VCC

2

Wifi_DM

3

Wifi_DP

4

GND

5

WOL/WIFI_Power_ON

6

3.4V_VCC

7

COMBO_RESET

8

GND

9

BT_WAKEUP_DEVICE

10

BT_WAKEUP_HOST

11

GND

12

GND

13

NC

14

NC

15

NC

16

EYE_SDA

17

EYE_SCL

18

GND

19

IR

20

LED_R

21

GND

22

3.4V_VCC

23

KEY2

24

KEY1

25

GND

<32LJ600U-ZA>

① IR & EYE Sensor

Error

symptom

Content

Remote control operation checking method

D. Function error

Established

date

Revised

date

A14

Checking order to check remote control

Checking order

1.Check IR cable condition between IR & Main board.( Check picture number① and ②)

2.Check the standby 3.5V on the terminal 16 pin (③)

3.AS checking the Pre-Amp(IR LED light) , the power is in ON condition, an Analog Tester needle should move slowly, otherwise, it’s defective.

③

②

A14

Standard Repair Process Detail Technical Manual

Pin name

1

3.4V_VCC

2

Wifi_DM

3

Wifi_DP

4

GND

5

WOL/WIFI_Power_ON

6

3.4V_VCC

7

COMBO_RESET

8

GND

9

BT_WAKEUP_DEVICE

10

BT_WAKEUP_HOST

11

GND

12

GND

13

NC

14

NC

15

NC

16

EYE_SDA

17

EYE_SCL

18

GND

19

IR

20

LED_R

21

GND

22

3.4V_VCC

23

KEY2

24

KEY1

25

GND

Error

symptom

Content

<32LJ600U-ZA>: Wifi Only 모델

① Wifi Assy Front

Wifi Assy Rear

Remote control operation checking method

D. Function error

Established

date

Revised

date

A15

Checking order to check motion remote/wifi

Checking order

1.Check BT/Wifi cable condition between BT/Wifi assy & Main board.

2.Check the 3.5V on the terminal 22

③

②

A15