LG LAS950M Service Manual

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P/NO : AFN77255292 JULY, 2015

(LAS950M, S95A1-D)

CAUTION

BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS” IN THIS MANUAL.

Website http://biz.lgservice.com

Internal Use Only

MODEL: LAS950M (LAS950M, S95A1-D)SERVICE MANUAL

Smart Hi-Fi Audio Wireless Multi-room Sound Bar

SERVICE MANUAL

MODEL: LAS950M

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CONTENTS

SECTION 1 ........ SUMMARY

SECTION 2 ........ ELECTRICAL

SECTION 3 ........ CABINET & MAIN CHASSIS

SECTION 4 ........ WIRELESS SUBWOOFER PART

SECTION 5 ........ REPLACEMENT PARTS LIST

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SECTION 1

SUMMARY

CONTENTS

PRODUCT SAFETY SERVICING GUIDELINES FOR AUDIO PRODUCTS .............................................. 1-3

SERVICING PRECAUTIONS .......................................................................................................................... 1-4

• GENERAL SERVICING PRECAUTIONS

• INSULATION CHECKING PRODEDURE

• ELECTROSTATICALLY SENSITIVE (ES) DEVICES

WIRELESS SUBWOOFER CONNECTION ................................................................................................... 1-5

LAN UPDATE GUIDE ...................................................................................................................................... 1-6

SOFTWARE UPDATE GUIDE ...................................................................................................................... 1-10

HOW TO WIRELESS FACTORY RESET & PAIRING ............................................................................... 1-14

HIDDEN MODE ............................................................................................................................................... 1-14

VERSION CHECK .......................................................................................................................................... 1-15

OPTION EDIT GUIDE .................................................................................................................................... 1-16

SPECIFICATIONS .......................................................................................................................................... 1-17

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PRODUCT SAFETY SERVICING GUIDELINES

FOR AUDIO PRODUCTS

IMPORTANT SAFETY NOTICE

This manual was prepared for use only by properly trained audio-video service technicians. When servicing this product, under no circumstances should the original design be modified or altered without permission from LG Corporation. All components should be replaced only with types identical to those in the original circuit and their physical location, wiring and lead dress must conform to original layout upon completion of repairs.

Special components are also used to prevent x-radiation, shock and fire hazard. These components are indicated by the letter “x” included in their component designators and are required to maintain safe performance. No deviations are allowed without prior approval by LG Corporation. Circuit diagrams may occasionally differ from the actual circuit used. This way, implementation of the latest safety and performance improvement changes into the set is not delayed until the new service literature is printed.

CAUTION : Do not attempt to modify this product in any way. Never perform cus-

tomized installations without manufacturer’s approval. Unauthorized modifications will not only void the warranty, but may lead to property damage or user injury.

Service work should be performed only after you are thoroughly familiar with these safety checks and servicing guidelines.

GRAPHIC SYMBOLS

The exclamation point within an equilateral triangle is intended to alert the service personnel to important safety information in the service literature. The lightning flash with arrowhead symbol within an equilateral triangle is intended to alert the service personnel to the presence of noninsulated “dangerous voltage” that may be of sufficient magnitude to constitute a risk of electric shock. The pictorial representation of a fuse and its rating within an equilateral triangle is intended to convey to the service personnel the following fuse replacement caution notice: CAUTION : FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ALL FUSES WITH THE SAME TYPE AND RATING AS MARKED NEAR EACH FUSE.

SERVICE INFORMATION

While servicing, use an isolation transformer for protection from AC line shock. After the original service problem has been corrected, make a check of the following:

FIRE AND SHOCK HAZARD

1. Be sure that all components are positioned to avoid a possibility of adjacent component shorts. This is especially important on items trans-ported to and from the repair shop.

2. Verify that all protective devices such as insulators, barriers, covers, shields, strain reliefs, power supply cords, and other hardware have been reinstalled per the original design. Be sure that the safety purpose of the polarized line plug has not been defeated.

3. Soldering must be inspected to discover possible cold solder joints, solder splashes, or sharp solder points. Be certain to remove all loose foreign particles.

4. Check for physical evidence of damage or deterioration to parts and components, for frayed leads or damaged insulation (including the AC cord), and replace if necessary.

5. No lead or component should touch a high current device or a resistor rated at 1 watt or more. Lead tension around protruding metal surfaces must be avoided.

6. After reassembly of the set, always perform an AC leakage test on all exposed metallic parts of the cabinet (the channel selector knobs, antenna terminals, handle and screws) to be sure that set is safe to operate without danger of electrical shock. DO NOT USE A LINE ISOLATION TRANSFORMER DURING THIS TEST. Use an AC voltmeter having 5000 ohms per volt or more sensitivity in the following manner: Connect a 1500 ohm, 10 watt resistor, paralleled by a .15 mfd 150V AC type capacitor between a known good earth ground water pipe, conduit, etc.) and the exposed metallic parts, one at a time. Measure the AC voltage across the combination of 1500 ohm resistor and .15 mfd capacitor. Reverse the AC plug by using a non-polarized adaptor and repeat AC voltage measurements for each exposed metallic part. Voltage measured must not exceed 0.75 volts RMS. This corresponds to 0.5 milliamp AC. Any value exceeding this limit constitutes a potential shock hazard and must be corrected immediately.

TIPS ON PROPER INSTALLATION

1. Never install any receiver in a closed-in recess, cubbyhole, or closely fitting shelf space over, or close to, a heat duct, or in the path of heated air flow.

2. Avoid conditions of high humidity such as: outdoor patio installations where dew is a factor, near steam radiators where steam leakage is a factor, etc.

3. Avoid placement where draperies may obstruct venting. The customer should also avoid the use of decorative scarves or other coverings that might obstruct ventilation.

4. Wall- and shelf-mounted installations using a commercial mounting kit must follow the factory-approved mounting instructions. A product mounted to a shelf or platform must retain its original feet (or the equivalent thickness in spacers) to provide adequate air flow across the bottom. Bolts or screws used for fasteners must not touch any parts or wiring. Perform leakage tests on customized installations.

5. Caution customers against mounting a product on a sloping shelf or in a tilted position, unless the receiver is properly secured.

6. A product on a roll-about cart should be stable in its mounting to the cart.

Caution the customer on the hazards of trying to roll a cart with small casters

across thresholds or deep pile carpets.

7. Caution customers against using extension cords. Explain that a forest of extensions, sprouting from a single outlet, can lead to disastrous consequences to home and family.

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SERVICING PRECAUTIONS

CAUTION: Before servicing the service data and its supplements and addends, read and follow the SAFETY PRECAUTIONS. NOTE: if unforeseen circumstances create conflict between the following servicing precautions and any of the safety precautions in this publication, always follow the safety precautions. Remember Safety First :

General Servicing Precautions

1. Always unplug the AC power source before:

(1) Removing or reinstalling any component, circuit board,

module, or any other assembly.

(2) Disconnecting or reconnecting any internal electrical

plug or other electrical connection.

(3) Connecting a test substitute in parallel with an electro-

lytic capacitor.

Caution: A wrong part substitution or incorrect polarity

installation of electrolytic capacitors may result in an explosion hazard.

2. Do not spray chemicals on or near this of its assemblies.

3. Unless specified otherwise in this service data, clean electrical contacts by applying an appropriate contact cleaning solution to the contacts with a pipe cleaner, cotton-tipped swab, or comparable soft applicator.

Unless specified otherwise in this service data, lubrication

of contacts is not required.

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

5. Do not apply AC power to this of its electrical assemblies unless all solid state device heat sinks are correctly installed.

6. Always connect the test instrument ground lead to an appropriate ground before connecting the test instrument positive lead. Always remove the test instrument ground lead last.

Insulation Checking Procedure

Disconnect the attachment plug from the AC outlet and turn the power on. Connect an insulation resistance meter (500V) to the blades of the attachment plug. The insulation resistance between each blade of the attachment plug and accessible conductive parts (Note 1) should be more than 1Mohm. Note 1: Accessible Conductive Parts include Metal panels, Input terminals, Earphone jacks,etc.

Audio products

AC power cord from the

Audio products

covered by this

Audio products

and / or any

or any

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 field effect transistors and semiconductor chip components. The following techniques should be used to help reduce the incidence of component damage caused 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 for 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 solder removal device. Some solder removal devices not classified as “anti-static” can generate electrical charges sufficient to damage ES devices.

5. Do not use freon-propelled chemicals. These can generate an electrical charge sufficient 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 cir-

cuit, and observe all other safety precautions.

8. Minimize bodily motions when handling unpackaged replacement ES devices. (Normally harmless motion such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity sufficient to damage an ES device.)

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WIRELESS SUBWOOFER CONNECTION

LED indicator of wireless subwoofer

LED Color Status

Green (Blink)

Green The connection is completed.

Red

Off (No display)

Setting up the wireless subwoofer for the ﬁ rst time

1. Connect the power cord of the wireless subwoofer to the outlet.

2. Turn on the main unit : The main unit and wireless subwoofer will be automatically connected.

Manually pairing wireless subwoofer

When your connection is not completed, you can see the red LED or the blinking of green LED on the wireless subwoofer and the subwoofer does not make sound. To solve the problem, follow the below steps.

1. Adjust volume level of the main unit to minimum.

- ”VOL MIN” appears on the display window.

2. Press and hold (Mute) on the remote control for about 3 seconds.

- “WL RESET” appears on the display window brieﬂ y.

3. If the LED of the wireless subwoofer already blinks in green continually, you can skip this step. Press and hold PAIRING on the back of the wireless subwoofer for more than 5 seconds.

The connection is trying.

The wireless subwoofer is in standby mode or the connection is failed.

The power cord of wireless subwoofer is disconnected.

- The LED of the wireless subwoofer lights up alternately in red and green.

4. Disconnect the power cord of the main unit and the wireless subwoofer.

5. Connect them again after the LED of the main unit and the wireless subwoofer is fully turned off. The main unit and the wireless subwoofer will be paired automatically when you turn on the main unit.

- When the connection is completed, you can see the green LED on the subwoofer.

Note

• It takes a few seconds (and may take longer) for

the main unit and the subwoofer to communicate with each other and make sounds.

• The closer the main unit and the subwoofer, the better sound quality. It is recommended to install the main unit and the subwoofer as close as possible (within 5 m) and avoid the cases below.

- There is a obstacle between the main unit and the subwoofer.

- There is a device using same frequency with this wireless connection such as a medical equipment, a microwave or a wireless LAN device.

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LAN UPDATE GUIDE

1. Using MP tool

1) Open MP tool and select “Key DN”.

2) Check the section for download and open download ﬁ le.

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3) Connect PC and SET by cross LAN cable. PC IP setting IP: 192.168.0.1 Subnet: 255.255.254.0 Gateway: 10.168.0.1

4) Set power on.

5) Connect LAN cable to Set and then Press “ADD” key within 3 seconds after connect the LAN. (Please connect the LAN when blinking WiFi-LED after booting)

*Download ﬁ le name B/E : LG_NB_9000M06.ROM MICOM : MICOM_LAS950.HEX

6) Connect Status change “OK!” if success connect MP tool.

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7) Press “Update” button.

8) Download result display “OK!” if start download.

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9) You can identify update status by network indicator lamp.

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SOFTWARE UPDATE GUIDE

1. Using USB

1-1. MICOM

1) Copy the ﬁ rmware to USB.

- Change the ﬁ le name to “MICOM_LAS950.HEX”.

2) Insert USB to USB port.

3) VFD display “UPGRADE”.

4) Press “PLAY/PAUSE” key.

5) VFD display “M-UPDATE”.

6) Set auto power off after updating done.

1-2. MPEG

1) Copy the ﬁ rmware to USB.

- Make the folder by “UPG_ALL” and copy ﬁ rmware in “UPG_ALL” folder.

- Change the ﬁ le name to “LG_NB_9000M06.ROM”.

2) Insert USB to USB port.

3) VFD display “UPGRADE”.

4) Press “PLAY/PAUSE” key.

5) VFD display “B-UPDATE”.

6) Set auto power off after updating done.

1-3. DSP

1) Copy the ﬁ rmware to USB.

- Change the ﬁ le name to “DSP_LAS950.HEX”.

2) Insert USB to USB port.

3) VFD display “UPGRADE”.

4) Press “PLAY/PAUSE” key.

5) VFD display “UPDATE”.

6) Return to the before function, after ﬁ nished the updating.

1-4. EQ

1) Copy the ﬁ rmware to USB.

- Change the ﬁ le name to “EQ_PRG.BIN”.

2) Insert USB to USB port.

3) VFD display “UPGRADE”.

4) Press “PLAY/PAUSE” key.

5) VFD display “EQUPDATE”.

6) Set auto power off after ﬁ nished the updating.

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2. Using APP

1) Connect set and music ﬂ ow app.

2) Select “setup  update” menu then you can see below menu.

3) Enter “Check” button then display speaker list for update.

download

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4) Enter “download” button then start download to speaker.

download

Downloading…

5) Display below menu after done download then enter “Ready” button for updating.

Ready

Do wnlo aded

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6) Display below menu after done update

Updated

7) Set rebooting. (Booting previous version if failed update.)

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HOW TO WIRELESS FACTORY RESET & PAIRING

1) Main set Wireless Reset.

- Volume Minimum state + Remote control “mute” for 5 seconds.

- Then, “WL RESET” will be displayed on the LCD.

2) Power off Main set.

3) Wireless Subwoofer: Wireless Reset.

- Press and hold PAIRING key on the back of the wireless subwoofer for more than 5 seconds.

- Then, LED will be blinking Red & Green.

4) Power off the Wireless Subwoofer.

5) Power on both.

6) If the Wireless Subwoofer LED color changed Green, they are paired.

HIDDEN MODE

 Reset

Press “ADD” button for 8 seconds.

 Micom reset

Remote control “play” + “WIFI SETUP” key.

 Option code mode

Remote control “2” + “Vol-” key.

 Wireless reset

Volume minimum state + Remote control “mute” for 5 seconds.

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VERSION CHECK

1) PC IP setting IP: 192.168.0.1 Subnet: 255.255.254.0 Gateway: 10.168.0.1

2) Open MP tool.

3) Set power on.

4) Press “ADD” button after connect LAN cable.

5) Display the version in the tool.

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OPTION EDIT GUIDE

1-1. Option Edit-1

1) PC IP setting IP: 192.168.0.1 Subnet: 255.255.254.0 Gateway: 10.168.0.1

2) Open MP tool.

3) Check Option Transmission and select option ﬁ le by “File open” button.

4) Set power on.

5) Press “ADD” button after connect LAN cable.

6) Enter “Update” button in the tool menu.

7) Download result is “OK” or “NG”.

1-2. Option Edit-2 (Need a HTS Remote control)

1) Hidden mode : Remote control “2” + “Vol-” key

2) Change option code by remote control.

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SPECIFICATIONS

• GENERAL

Power requirements Refer to the main label on the unit. Power consumption 50 W Networked standby : 6.0 W (If all network ports are activated.) Dimensions (W x H x D) (1100 x 106 x 135) mm (without Foot) Net Weight (Approx.) 8.2 kg Operating temperature 5 °C to 35 °C Operating humidity 5 % to 90 %

• INPUT/OUTPUT

OPT. IN 3 V (p-p), Optical jack x 2 PORTABLE IN 0.5 Vrms (3.5 mm stereo jack) x 1 HDMI IN 19 Pin (Type A, HDMI™ connector) x 3 HDMI OUT 19 Pin (Type A, HDMI™ connector) x 1 Available Digital Input Audio Sampling Frequency 32 kHz, 44.1 kHz, 48 kHz, 96 kHz

• AMPLIFIER

Total 700 W Front 75 W x 2 (4 Ω at 1 kHz) Rear 75 W x 2 (4 Ω at 1 kHz) Surround 75 W x 2 (4 Ω at 1 kHz) Center 75 W (4 Ω at 1 kHz) Subwoofer 175 W (3 Ω at 80 Hz) THD 10 %

• WIRELESS SUBWOOFER

Power requirements Refer to the main label on the subwoofer. Power consumption 35 W Type 1 Way 1 Speaker Impedance 3 Ω Rated Input Power 175 W Max. Input Power 350 W Dimensions (W x H x D) (296 x 332 x 296) mm Net Weight (Approx.) 7.6 kg

• SYSTEM

ETHERNET (LAN) port Ethernet jack x 1, 10 BASE-T/100 BASE-TX Wireless LAN (Internal antenna) Integrated IEEE 802.11n (Draft 2.0) wireless networking access, compatible with 802.11a/b/g/n Wi-Fi networks.

• BLUETOOTH

Version 4.0 Codec SBC

• Designs and specifications are subject to change without prior notice.

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SECTION 2

ELECTRICAL

CONTENTS

ONE POINT REPAIR GUIDE ............................................................................................................................ 2-2

1. NO POWER PROBLEM. ........................................................................................................................ 2-2

2. NO BOOTING WHEN YOU TURN THE UNIT ON, NO MESSAGE OR

“HELLO” ON FRONT PANEL ................................................................................................................. 2-4

3. NO SOUND ............................................................................................................................................. 2-7

ELECTRICAL TROUBLESHOOTING GUIDE ................................................................................................. 2-12

1. POWER SUPPLY ON SMPS BOARD .................................................................................................. 2-12

2. POWER SUPPLY ON MAIN BOARD ................................................................................................... 2-13

3. SYSTEM PART ..................................................................................................................................... 2-19

4. NO AUDIO OUTPUT ............................................................................................................................ 2-21

5. NO HDMI OUTPUT ............................................................................................................................... 2-23

WAVEFORMS OF MAJOR CHECK POINT .................................................................................................... 2-24

1. ADC I2S WAVEFORM (IC200) ............................................................................................................. 2-24

2. DSP OUTPUT I2S WAVEFORM (IC600) ............................................................................................. 2-25

3. LCD DATA LINE OUTPUT WAVEFORM (IC100) ................................................................................ 2-26

4. RMC WAVEFORM ................................................................................................................................ 2-27

5. I2C WAVEFORM .................................................................................................................................. 2-28

WIRING DIAGRAM .......................................................................................................................................... 2-31

BLOCK DIAGRAMS ........................................................................................................................................ 2-33

1. POWER BLOCK DIAGRAM ................................................................................................................. 2-33

2. SYSTEM BLOCK DIAGRAM ................................................................................................................ 2-35

CIRCUIT DIAGRAMS ...................................................................................................................................... 2-37

1. SMPS CIRCUIT DIAGRAM .................................................................................................................. 2-37

2. MAIN - MICOM CIRCUIT DIAGRAM .................................................................................................... 2-39

3. MAIN - MPEG CIRCUIT DIAGRAM ...................................................................................................... 2-41

4. MAIN - MEMORY CIRCUIT DIAGRAM ................................................................................................ 2-43

5. MAIN - ADC & I/O CIRCUIT DIAGRAM ............................................................................................... 2-45

6. MAIN - DCDC CIRCUIT DIAGRAM ...................................................................................................... 2-47

7. MAIN - DSP CIRCUIT DIAGRAM ......................................................................................................... 2-49

8. MAIN - DAC / AMP CIRCUIT DIAGRAM .............................................................................................. 2-51

9. HDMI CIRCUIT DIAGRAM.................................................................................................................... 2-53

10. FRONT CIRCUIT DIAGRAM ................................................................................................................ 2-55

11. KEY CIRCUIT DIAGRAM...................................................................................................................... 2-57

CIRCUIT VOLTAGE CHART ........................................................................................................................... 2-59

1. ICs ......................................................................................................................................................... 2-59

2. CAPACITORS ....................................................................................................................................... 2-61

3. CONNECTORS ..................................................................................................................................... 2-62

PRINTED CIRCUIT BOARD DIAGRAMS ....................................................................................................... 2-63

1. SMPS P. C. BOARD DIAGRAM ........................................................................................................... 2-63

2. MAIN P. C. BOARD DIAGRAM ............................................................................................................ 2-65

3. HDMI P. C. BOARD DIAGRAM ............................................................................................................ 2-67

4. FRONT P. C. BOARD DIAGRAM ......................................................................................................... 2-67

5. KEY P. C. BOARD DIAGRAM .............................................................................................................. 2-67

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ONE POINT REPAIR GUIDE

1. NO POWER PROBLEM

If the unit doesn’t work by no power problem, repair the set according to the following guide.

1-1. No power

1-1-1. Solution

Replace F901, BD901, TH901 on SMPS board.

1-1-2. How to troubleshoot (Countermeasure)

1) Check if the fuse F901 is open or short-circuit.

2) Check if the bridge diode BD901 is short-circuit by over current with a digital multimeter.

3) Check if the NTC thermistor TH901 is normal or open.

1-1-3. Service hint (Any picture / Remark)

F901

If F901 is not

short-circuit,

replace it with a

same speciﬁ cations

one.

BD901

If BD901 is short-circuit,

replace it with a new one.

2-2

TH901

If TH901 is open,

replace it with a new one.

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ONE POINT REPAIR GUIDE

NO POWER PROBLEM

If the unit doesn’t work by no ±PVDD problem, repair the set according to the following guide.

1-2. No AMP power

1-2-1. Solution

Replace F901, Q901 on SMPS board.

1-2-2. How to troubleshoot (Countermeasure)

1) Check if the fuse F901 is open or short-circuit.

2) Check the Drain-Source or Drain-Gate, Gate-Source Resistance of Q901 with a digital multimeter.  If it is short condition, it’s destroyed. Replace it with a new one. (Please replace FET at the same time although several FET is OK)

1-2-3. Service hint (Any picture / Remark)

If F901 is not short-circuit,

F901

replace it with a same speciﬁ cations one.

Q901

If Q901 is short-circuit,

replace it with a new one.

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ONE POINT REPAIR GUIDE

IC305

L310

2. NO BOOTING WHEN YOU TURN THE UNIT ON, NO MESSAGE OR “HELLO” ON FRONT PANEL

When you turn on your set, it will blank / no message on front panel, and stand-by LED doesn't work.

2-1. IC305 System 3.7 VA (No 3.7 VA)

2-1-1. Solution

Replace IC305 on MAIN board.

2-1-2. How to troubleshoot (Countermeasure)

1) Please check 25 VA of IC305 pin7 (VIN).

2) If 25 VA is abnormal, please check SMPS board.

3) If 25 VA is OK, but 3.7 VA is abnormal at the IC305 pin1 (VOUT) & L310, replace IC305.

2-1-3. Service hint (Any picture / Remark)

L310

IC305

< MAIN board top view >

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ONE POINT REPAIR GUIDE

IC308

NO BOOTING WHEN YOU TURN THE UNIT ON, NO MESSAGE OR

“HELLO” ON FRONT PANEL

When you turn on your set, it will blank / no message on front panel, and stand-by LED doesn't work.

2-2. IC308 System 3.3 VA (No 3.3 VA)

2-2-1. Solution

Replace IC308 on MAIN board.

2-2-2. How to troubleshoot (Countermeasure)

1) Please check 3.7 VA of IC308 pin3 (VIN).

2) If 3.7 VA is abnormal, please check IC305 pin1 (VOUT).

3) If 3.7 VA is OK, but 3.3 VA is abnormal at the IC308 pin6 (VOUT), replace IC308.

2-2-3. Service hint (Any picture / Remark)

IC308

< MAIN board top view >

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ONE POINT REPAIR GUIDE

IC304

IC301

NO BOOTING WHEN YOU TURN THE UNIT ON, NO MESSAGE OR

“HELLO” ON FRONT PANEL

When you turn on your set, it will blank / no message on front panel, and stand-by LED doesn't work.

2-3. LCD System power 5 V, 6.2 VA (No VCC_5V, No 6.2VA)

2-3-1. Solution

Replace IC301, IC304 on MAIN board.

2-3-2. How to troubleshoot (Countermeasure)

1) Please check CN401 pin7 (VCC_5V), pin10 (6.2VA).

2) If 5 V, 6.2 VA is abnormal, please check IC301 pin3 (VOUT), IC304 pin1 (SW).

3) If 5 V, 6.2 VA is abnormal, replace IC301, IC304.

2-3-3. Service hint (Any picture / Remark)

IC301

< MAIN board top view >

2-6

IC304

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ONE POINT REPAIR GUIDE

CN100

L101

3. NO SOUND

3-1. WIRELESS

3-1-1. Solution

Replace IC102 on MAIN board.

3-1-2. How to troubleshoot (Countermeasure)

1) Please check externally status of Wireless module cable connection on your eyes. (at CN100 and Wireless module)

2) Please check 3.3 V of WLS_3.3V (at L101). If 3.3 V is OK, please check SPI signal (WL_SPI_CS/DO/WP/DI/CLK) of IC102 (pin1, 2, 3, 5, 6).

3) If you can’t have no signal, please replace IC102.

4) If 3) is ok, and proceed S/W update (Main set, Wireless Subwoofer) when set is paired.

3-1-3. Service hint (Any picture / Remark)

L101

CN100

< MAIN board top view >

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ONE POINT REPAIR GUIDE

CN2001

L205

NO SOUND

3-2. BLUETOOTH

3-2-1. Solution

Replace IC501 on MAIN board.

3-2-2. How to troubleshoot (Countermeasure)

1) Please check externally status of Bluetooth module cable connection on your eyes. (at CN2011 and Bluetooth module)

2) Please check 3.3 VA (at L205). If 3.3 VA is OK, please check BT_RST, M_I2S_BCK, BT_PCM_IN of CN2011 (pin12, 11, 10) and BT_UART_RX, BT_UART_TX (pin4, 6). If you have no signal, please replace IC501.

3-2-3. Service hint (Any picture / Remark)

CN2001

< MAIN board top view > < MAIN board bottom view >

2-8

L205

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ONE POINT REPAIR GUIDE

R204

L203

R205

IC501

NO SOUND

3-3. OPTICAL

3-3-1. Solution

Replace IC501 on MAIN board.

3-3-2. How to troubleshoot (Countermeasure)

1) Please check 3.3 VA (at L203).

2) If you can check 3.3 VA, please check OPT_DET signal (R204, R205) when optical mode.

3) In spite of process 2), set has abnormal output, then replace IC501.

3-3-3. Service hint (Any picture / Remark)

R204

L203

R205

IC501

< MAIN board top view >

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ONE POINT REPAIR GUIDE

CN803

CN802

CN800

CN801

IC803

IC801

IC800

IC802

NO SOUND

When unit is connected to HDMI TV using HDMI cable, picture shows bad color, no output or mixed color on the screen. But component output is OK.

3-4. HDMI

3-4-1. Solution

Replace IC800, CN800, CN801, CN802, CN803 (HDMI jack).

3-4-2. How to troubleshoot (Countermeasure)

1) Check HDMI_5VA at pin3 of IC803.

2) Check HDMI_3.3V at pin3 of IC801.

3) Check HDMI_1V at pin8 of IC802.

4) 1), 2), 3) is OK  Replace IC800.

5) Check CN105, CN804 (MAIN  HDMI B to B (board to board) connector).

6) B to B (board to board) connector is not good  Replace B to B (board to board) connector (CN105, CN804).

3-4-3. Service hint (Any picture / Remark)

CN803

CN800

IC801

IC800

IC802

IC803

< HDMI board top view >

2-10

CN802

CN801

Page 30

ONE POINT REPAIR GUIDE

IC7003

IC7005

IC7007

IC7001

IC802

NO SOUND

3-5. IC705 (DAC IC)

3-5-1. Solution

Replace IC7001, IC7003, IC7005, IC7007 (DAC IC).

3-5-2. How to troubleshoot (Countermeasure)

1) Check IC7001, IC7003, IC7005, IC7007 pin soldering.

2) If there is short soldering on pin, re-soldering.

3) Check DAC_3.3V at L7000, L7002, L7004, L7006, L7010, L7012, L7015, L7017.

4) If soldering is ok, replace IC7001, IC7003, IC7005, IC7007.

3-5-3. Service hint (Any picture / Remark)

IC802

IC7003

IC7005

IC7007

IC7001

< MAIN board bottom view >

2-11

Page 31

ELECTRICAL TROUBLESHOOTING GUIDE

1. POWER SUPPLY ON SMPS BOARD

Power on mode no output 25 VA. Power off mode no output 12 VA.

YES

Is F901 normal?

YES

Is IC901 normal?

YES

Is the VCC

(10 ~ 28 V) supplied to IC901

pin4?

YES

Is Q901 normal?

Replace F901.

(same fuse)

Replace IC901.

Replace D903.

Check or replace

D904.

YES

Replace Q903.

Replace Q901.

YES

Is PC901 normal?

YES

Is IC910 normal?

YES

Is D917 normal?

YES

Power line of MAIN board is short.

2-12

Replace PC901.

Replace IC910.

Replace D917.

Page 32

ELECTRICAL TROUBLESHOOTING GUIDE

2. POWER SUPPLY ON MAIN BOARD

NO 3.7 VA

YES

Is 25 VA to pin7

of IC305 normal?

YES

Is D301 normal?

YES

Is switching pulse of

IC305 pin1 normal?

YES

3.7 VA power line is normal.

Check 25 VA on SMPS board.

Replace D301.

Replace IC305.

NO 3.3 VA (MICOM)

YES

Is 3.7 VA to pin3

of IC308 normal?

YES

Is R350 & IC308 normal ?

YES

Are R351, R353, R354 normal ?

YES

3.3 VA power line is normal.

2-13

Check IC305 & 3.7 VA power line.

Replace R350 & IC308.

Replace R351, R353, R354.

Page 33

ELECTRICAL TROUBLESHOOTING GUIDE

NO D_3.3V (DSP / MPEG)

YES

Is 3.7 VA to pin3

of IC309 normal?

YES

Is there DC voltage

to pin2 of IC309?

YES

Is there DC voltage

to pin6 of IC309?

YES

D_3.3V power line is normal.

Check IC309 & 3.7 VA power line.

Check R347.

Check R348, R349, R352.

NO DAC_3.3V (DAC)

YES

Is 3.7 VA to pin1

of IC302 normal?

YES

Is there H (3.3 V) voltage

to pin3 of IC302?

YES

Is there DC voltage

to pin5 of IC302?

YES

DAC_3.3V power line is normal.

2-14

Check IC305 & 3.7 VA power line.

Check R315.

Replace IC302.

Page 34

ELECTRICAL TROUBLESHOOTING GUIDE

NO WLS_3.3V (Wireless module)

YES

Is 3.7 VA to pin1

of IC303 normal?

YES

Is there H (3.3 V) voltage

to pin3 of IC303?

YES

Is there DC voltage

to pin5 of IC303?

YES

WLS_3.3V power line is normal.

Check IC305 & 3.7 VA power line.

Check R318.

Replace IC303.

NO WIFI_3.5VA (Wi-Fi module)

YES

Is 3.7 VA to pin3

of IC307 normal?

YES

Is there H (3.3 V) voltage

to pin2 of IC307?

YES

Is there DC voltage

to pin6 of IC307?

YES

WIFI_3.5VA power line is normal.

2-15

Check IC305 & 3.7 VA power line.

Check R327.

Replace IC307.

Page 35

ELECTRICAL TROUBLESHOOTING GUIDE

NO 6.2 VA

YES

Is 25 VA to pin7

of IC304 normal?

YES

Is D300 normal?

YES

Is switching pulse of

IC304 pin1 normal?

YES

6.2 VA power line is normal.

Check 25 VA on SMPS board.

Replace D300.

Replace IC304.

NO VCC_5V (USB & LCD)

YES

Is 6.2 VA to pin2

of IC301 normal?

YES

Is there H (3.3 V) voltage

to pin1 of IC301?

YES

Is there DC voltage

to pin3 of IC301?

YES

VCC_5V power line is normal.

2-16

Check IC304 & 6.2 VA power line.

Check R314.

Replace R317, R320, R355 & IC301.

Page 36

ELECTRICAL TROUBLESHOOTING GUIDE

NO 1.5 V (MPEG & DDR3)

YES

Is 6.2 VA to pin8, 13

of IC300 normal?

YES

Is there H (3.3 V) voltage

to pin6, 15 of IC300?

YES

Is switching pulse of

IC300 pin12 normal?

YES

1.5 V power line is normal.

Check IC304 & 6.2 V power line.

Check R306, R307.

Replace IC300.

NO 1.2 V (MPEG CORE)

YES

Is 6.2 VA to pin8, 13

of IC300 normal?

YES

Is there H (3.3 V) voltage

to pin6, 15 of IC300?

YES

Is switching pulse of

IC300 pin9 normal?

YES

1.2 V power line is normal.

2-17

Check IC304 & 6.2 V power line.

Check R306, R307.

Replace IC300.

Page 37

ELECTRICAL TROUBLESHOOTING GUIDE

NO HDMI_3.3V

YES

Is 3.7 VA to pin2 of

IC801 normal?

YES

Is there H (3.3 V) voltage

to pin1 of IC801?

YES

Is there DC voltage

to pin3 of IC801?

YES

HDMI_3.3V power line is normal.

Check IC305 & 3.7 VA power line.

Check R848.

Replace R847, R849, R850 & IC801.

NO HDMI_1V

YES

Is HDMI_3.3V to pin1, 4

of IC802 normal?

YES

Is there DC voltage

to pin8 of IC802?

YES

HDMI_1V power line is normal.

2-18

Check IC801 & HDMI_3.3V power line.

Replace R852, R853 & IC802.

Page 38

ELECTRICAL TROUBLESHOOTING GUIDE

3. SYSTEM PART

POWER ON

STAND-BY LED OK ?

Pin1 of IC305

and pin6 of IC308

are OK?

Check MICOM

S/W download.

YES

Check IC305, IC308

and SMPS board.

MAIN Board

YES

3.3 VA OK?

YES

Check Q402, LD400.

MAIN to FRONT cable

connection OK?

Check IC305, IC308.

FRONT Board

Proper cable connect.

2-19

Page 39

ELECTRICAL TROUBLESHOOTING GUIDE

“HELLO”

Display on LCD

OK?

YES

Signal

EEPROM_CLK / DAT

OK?

Signal MICOM_UART_TX MICOM_UART_RX

OK?

6.2 VA,

VCC_5V, F_3.3VA

OK?

MAIN Board

Signal

LCD_DO / CLK / STB

OK?

YES

Replace IC101.

(EEPROM)

Replace IC100 or IC501.

Replace LCD.

Check connection

& LCD module.

System part OK.

YES

Signal

BL_CTL

OK?

YES

FRONT Board

Proper assemble

MAIN, FRONT and KEY

board OK?

YES

2-20

Check Q403.

Assemble properly.

Page 40

ELECTRICAL TROUBLESHOOTING GUIDE

4. NO AUDIO OUTPUT

SPEAKER OUTPUT

YES

SOUND OK?

YES

Pin39, 40, 41, 44, 49, 52

of IC600 signal OK?

YES

Pin6, 7

of IC7001, IC7003, IC7005, IC7007

signal OK?

YES

Pin21, 23, 27, 29

of IC7000, IC7002, IC7004, IC7006

signal OK?

YES

Replace MAIN board.

Check CN7000, CN7001 CN7002 or replace.

Check IC600 (DSP) or replace.

Check each DAC IC or replace.

Check each AMP IC or replace.

BLUETOOTH FUNCTION

YES

CN2011 status

OK?

YES

CN2011 pin1

3.3 VA OK?

YES

CN2011 I2S

signal OK?

YES

Replace BT module.

2-21

Replace CN2011.

Check L205 & 3.3 VA line.

Check BT I2S signal line.

Page 41

ELECTRICAL TROUBLESHOOTING GUIDE

OPTICAL FUNCTION

YES

JK201, JK204

status OK ?

YES

JK201, JK204 pin3

3.3 VA OK?

YES

OPT1/2_DET

OPT1/2_SPDIF signal

OK?

YES

Replace IC501.

Replace JK201, JK204.

Check L203 & 3.3 VA line.

Check OPT_SPDIF & OPT_DET signal line.

Wi-Fi FUNCTION

YES

CN200

status OK?

YES

CN200 pin6

WIFI_ 3.5VA OK?

YES

Wi-Fi Connection is OK?

YES

Replace Wi-Fi module.

2-22

Replace CN200.

Check WIFI_3.5VA line.

Check Wi-Fi cable connection.

Page 42

ELECTRICAL TROUBLESHOOTING GUIDE

5. NO HDMI OUTPUT

No HDMI Audio / Video output

YES

CN105, CN804

B to B connector OK?

YES

CN803 pin18 &

HDMI_5.5VA OK?

YES

CN803 pin19 HP_DET about 2.0 ~ 5.3 V OK?

YES

IC800

1.0 V, 3.3 V OK?

YES

X800

27 MHz OK?

YES

Replace B to B (board to board) connector.

Check D812 & HDMI_5.5VA line.

Check hot plug detect signal from TV.

Check IC801, IC802, IC803.

Check X800 or replace.

IC100

HDMI_SCL/SDA, PWR_CTRL, CEC

OK?

YES

Is there signal on TMDS?

YES

HDMI output OK.

2-23

Check IC100.

Check TMDS trace from IC800.

Page 43

WAVEFORMS OF MAJOR CHECK POINT

1. ADC I2S WAVEFORM (IC200)

M_I2S_MCLK Waveform (24.576 MHz) - PIN6

M_I2S_BCK Waveform (3.072 MHz) - PIN8

M_I2S_LRCK Waveform (48.00 MHz) - PIN7

M_ADC_DATA Waveform - PIN9

2-24

Page 44

2. DSP OUTPUT I2S WAVEFORM (IC600)

DSP_I2S_BCK Waveform (12.288 MHz) - PIN40

DSP_I2S_LRCK Waveform (192 KHz) - PIN39

DSP_I2S_FL_RL/C_FW/FR_RR/BL_BR Waveform

& Rising time - PIN44, 49, 52

DSP_I2S_FL_RL/C_FW/FR_RR/BL_BR Waveform

& Rising time - PIN44, 49, 52

2-25

Page 45

3. LCD DATA LINE OUTPUT WAVEFORM (IC100)

LCD_DO Waveform - PIN44

LCD_STB Waveform - PIN45

LCD_CLK Waveform - PIN46

2-26

Page 46

4. RMC WAVEFORM

RMC LEAD CODE TIMING (SPEC 4.5 ms)

RMC BIT CODE TIMING (SPEC 0.56 ms)

2-27

Page 47

5. I2C WAVEFORM

UART_TX (MICOM  MPEG)

UART_RX (MICOM  MPEG)

SPI_CLK (MICOM  DSP)

SPI_DAT (MICOM  DSP)

2-28

Page 48

I2C WAVEFORM

HDMI_SCL (MICOM  HDMI)

HDMI_SDA (MICOM  HDMI)

DSP_OUTPUT_BCK (DSP  DAC x 4 / Wireless)

DSP_OUTPUT_LRCK (DSP  DAC x 4 / Wireless)

2-29

Page 49

2-30

Page 50

2-322-31

WIRING DIAGRAM

SMPS

KEY FRONT

LCD Module

Ethernet

+ USB

OPT

PTB

MAIN

ㇵ⮨

FFC Harness

䚌

⮨

B to B

ROM version

Wi-Fi

Wireless TX

NFC

OPT

12P, 0.5mm ST, Lock, SMD

6P, 1.25mm ST, Lock, SMD (6630V90141E)

(EAG61090207)

26P, 0.5mm ST, Non_Lock, SMD (6630X60142K)

HDMI HDMI

HDMIHDMI

HDMI

2P, 1.25mm AG, No n_Lock ,SMD (6630V901352)

2P, 1.25mm ST, Lock, SMD (EAG60989201)

8P, 2.0mm ST, SMD

8P, 2.50mm Board IN Type

2P, 2mm ST, Lock , SMD (EAG63514501)

6P, 2mm ST, Lock , SMD (EAG63270201)

16P, 1mm ST, Non_Lock, SMD (6630XE00116)

10P, 1mm AG, Lock, SMD (EAG62611102)

20P, 2mm ST, SOCKET, SMD (EAG63717506)

20P, 2mm DIP HEADER, SMD

Download Connector

MTK Download 殯 4P, 2mm, ST, Non_Lock , SMD

MICOM Download 殯 5P, 1mm, ST, Non Lock, SMD

DSP Download 殯 10P, 2.54mm, ST, MAIL, SMD

8P, 2mm ST, Lock , SMD (EAG41647503)

16P, 1mm ST, Non_Lock, SMD (6630XE00116)

(EAG63717505)

Bottom side

Top side

Page 51

2-342-33

FUSE

(F901)

BD901

T901

TRANS

(C905,C906)

NOISE FILTER

BLOCK (CM901,R901, CM903,VR901,

LF901,LF902)

PHOTO COUPLER

(PC901)

SNUBBER

BLOCK

(D902,C964,C930

R915,R957,BC901)

DRIVE & S/W BLOCK

(IC101, D104, R105,

R102, C108 , C109,

ZD101,ZD102,C113)

Y-CAP

C903

Y-CAP

C901

RECTIFIER &

SMOOTING BLOCK

(D917,C951,

C952,C953)

25 VA (ON)

V-CTRL

OPT (Not Used)

12 VA (STAND-BY)

TH901

FEED-BACK

BLOCK

(R931,R920,R949

R930,R928.R914 C919.R907,R912

Q904, IC910)

BLOCK DIAGRAMS

1. POWER BLOCK DIAGRAM

Page 52

2-362-35

BT_RST/I2S/UART

ADC

PCM1808

Slave

OPTICAL IN1

D+/D -

M_BCK/LRCK/DATA0,1,2,3

DAC_RST/SPI_CLK/DI/DO/CS

LCD

KEY

DDR x 2

128 MB x 2

A_RA[0-14] A_DQ[0-31]

SPI0

PORTABLE

USB(SVC)

DSP_MCLK/BCLK/LRCK /CEN/FL/FR/REAR

TACT

MTK_RST/TX/RX/PWR_STATUS/INST_BOOT

WOOFER

WL_RST/DAT/CLK/MUTE/INT/MSG_RDY

MICOM

RENESAS 64P

AZ7027

P_SENSE

WiFi_P/N

Wi-Fi

(NEW)

OPT1_DET

BT_RST/RX

EPHY_TDP/N, EPHY_RDP/N

ETHERNET

(ROM)

OPT1_SPDIF

ADC_MCLK/LRCK/BCK/M_ADC_DAT

EEPROM

(2 KB)

EEP_CLK/DAT

MT8506

1.2 / 1.5 / 3.3 V

DD/DTS Decoding

PTB_DET

AMP_PDN/SD/CLIP/MUTE

HDMI IN1

EDID_I2C/CEC/EDID_SW/HPD_MICOM

HDMI OUT

M_I2S_DATA2/LRCK/BCK

Flash 1 MB

SPI_DI/DO/CS/CLK/WP

LCD_DO/CLK /STB/BL_CTRL /RMC

TPA3116D2

LAS950M 525W (75 W * 7EA)

FRONT

Wireless Woofer

27 MHz

OPTICAL IN2

OPT2_SPDIF

OPT2_DET

NAND

512 MB

HDMI

Sil9533

TMDS/HPD/EDID_I2C/ARC/CEC

TMDS1/RX_HPD1/EDID_I2C/PWR5V_1

HDMI IN2

HDMI IN3

TMDS2/RX_HPD2/EDID_I2C/PWR5V_2

TMDS3/RX_HPD3/EDID_I2C/PWR5V_3

HDMI_RST/I2C/INT

HDMI_SPDIF

PCM5101

DAC_MUTE

27 MHz

Flash 1 MB

SPI_DI/DO/CS/CLK

12.288 MHz

//C

DSP

ADAU1452

LAS950M 175 W

2. SYSTEM BLOCK DIAGRAM

Page 53

2-382-37

B C D E F G H I J K L M N O P Q R ST

No Power

BD901 is Defective

No Power

Q905 is Defective

No Power

Q901 is Defective

No Power

Q903 is Defective

No Power

D917, D918 are Defective

Switching Error

IC901 is Defective

Switching Error

PC901 is Defective

Voltage Error

Q902 is Defective

Voltage Error

Q904 is Defective

No Power

F901 is Defective

SMPS

EAX66106001 Rev1.8(20)

2014.12.10

Warning Parts that are shaded are critical with respect to risk of fire or electrical shock.

CIRCUIT DIAGRAMS

1. SMPS CIRCUIT DIAGRAM

WHEN SERVICING THIS CHASSIS, UNDER NO CIRCUMSTANCES SHOULD THE ORIGINAL DESIGN BE MODIFIED OR ALTERED WITHOUT PERMISSION FROM THE LG CORPORATION. ALL COMPONENTS SHOULD BE REPLACED ONLY WITH TYPES IDENTICAL TO THOSE IN THE ORIGINAL CIRCUIT. SPECIAL COMPONENTS ARE SHADED

ON THE SCHEMATIC FOR EASY IDENTIFICATION. THIS CIRCUIT DIAGRAM MAY OCCASIONALLY DIFFER FROM THE ACTUAL CIRCUIT USED. THIS WAY, IMPLEMENTATION OF THE LATEST SAFETY AND PERFORMANCE IMPROVEMENT CHANGES INTO THE SET IS NOT DELAYED UNTIL THE NEW SERVICE LITERATURE IS PRINTED.

1. Shaded( ) parts are critical for safety. Replace only with specified part number.

2. Voltages are DC-measured with a digital voltmeter during Play mode.

IMPORTANT SAFETY NOTE :

Page 54

2-402-39

B C D E F G H I J K L M N O P Q R ST

MICOM

EAX66206501 Rev1.3(11) MAIN(#1)

2014.12.10

2. MAIN - MICOM CIRCUIT DIAGRAM

Page 55

2-422-41

B C D E F G H I J K L M N O P Q R ST

MPEG

EAX66206501 Rev1.3(11) MAIN(#2)

2014.12.10

3. MAIN - MPEG CIRCUIT DIAGRAM

Page 56

2-442-43

B C D E F G H I J K L M N O P Q R ST

MEMORY

EAX66206501 Rev1.3(11) MAIN(#3)

2014.12.10

4. MAIN - MEMORY CIRCUIT DIAGRAM

Page 57

2-462-45

B C D E F G H I J K L M N O P Q R ST

ADC & I/O

EAX66206501 Rev1.3(11) MAIN(#4)

2014.12.10

5. MAIN - ADC & I/O CIRCUIT DIAGRAM

Page 58

2-482-47

B C D E F G H I J K L M N O P Q R ST

DCDC

EAX66206501 Rev1.3(11) MAIN(#5)

2014.12.10

6. MAIN - DCDC CIRCUIT DIAGRAM

Page 59

2-502-49

B C D E F G H I J K L M N O P Q R ST

DSP

EAX66206501 Rev1.3(11) MAIN(#6)

2014.12.10

7. MAIN - DSP CIRCUIT DIAGRAM

Page 60

2-522-51

B C D E F G H I J K L M N O P Q R ST

DAC/AMP

EAX66206501 Rev1.3(11) MAIN(#7)

2014.12.10

8. MAIN - DAC / AMP CIRCUIT DIAGRAM

Page 61

2-542-53

B C D E F G H I J K L M N O P Q R ST

HDMI

EAX66166301 Rev1.3(11)

2014.12.10

9. HDMI CIRCUIT DIAGRAM

Page 62

2-562-55

B C D E F G H I J K L M N O P Q R ST

FRONT

EAX66225701 Rev1.3(11)

2014.12.10

10. FRONT CIRCUIT DIAGRAM

Page 63

2-582-57

B C D E F G H I J K L M N O P Q R ST

KEY

EAX66166401 Rev1.3(11)

2014.12.10

11. KEY CIRCUIT DIAGRAM

Page 64

2-602-59

CIRCUIT VOLTAGE CHART

1. ICs

Designator Desc. Voltage Spec Pin

Mearsured

Voltage

Main Board

IC100 MICOM VDD : 1.6 ~ 5.5V 15,16 3.28

IC101 EEPROM VCC : 1.8V ~ 5.5V 8 3.28

IC102 Serial Flash VCC : -0.5V ~ 4.6V 8 3.59

IC103 Voltage Detector VCC: Max 18V 1 3.64

IC200 A/D Converter

VCC: 4.5V~5.5V 3 5.08

VDD: 2.7V~3.6V 4 3.29

IC300 DCDC

Vin1: 4.5V~18V 8 6.15

Vin2: 4.5V~18V 13 6.15

IC301 LDO Vin : 2.25V ~ 16V 2 6.18

IC302 LDO Vout : 3.251V ~ 3.35V 5 3.27

IC303 LDO Vout : 3.251V ~ 3.35V 5 3.6

IC304 DCDC

Vin : 4.5V ~ 48V 7 25.4

Vout : 0.8V ~ 42V 1 6.24

IC305 DCDC

Vin : 4.5V ~ 48V 7 25.4

Vout : 0.8V ~ 42V 1 3.75

IC307 LDO

Vin: 2.5V~5.5V 3 3.67

Vout:0.8V~5V 6 3.49

IC308 LDO

Vin: 2.5V~5.5V 3 3.67

Vout:0.8V~5V 6 3.27

IC309 LDO

Vin: 2.5V~5.5V 3 3.67

Vout:0.8V~5V 6 3.3

IC501 MPEG

DVCC12: 1.14V~1.26V K12 1.19

DVCC33: 3.15V~3.45V G14 3.367

AVDD12: 1.14V~1.26V N23 1.19

AVDD33: 3.15V~3.45V R26 3.367

DDRVCCIO1: 1.425V~1.575V AC3 1.552

DDRVREF: 0.775V N8 0.775

IC503 DDR

VDD : 1.425 ~ 1.575 B2,D9,G7,K2,K8,N1,N9,R1,R9 1.552

VREFCA: 0.49*VDD~0.51*VDD M8,H1 0.775

VDDQ:+1.425V~+1.575V A1,A8,C1,C9,D2,E9,E1,H2,H9 1.552

IC504 DDR

VDD : 1.425 ~ 1.575 B2,D9,G7,K2,K8,N1,N9,R1,R9 1.552

VREFCA: 0.49*VDD~0.51*VDD M8,H1 0.775

VDDQ:+1.425V~+1.575V A1,A8,C1,C9,D2,E9,E1,H2,H9 1.552

IC505 NAND VCC : 2.7V ~ 3.6V 12,37 3.366

IC600

AVDD : 1.2V ~ 3.3V 2,7,15,18,38,56 3.29

DVDD : 1.14V ~ 1.26V 20,35,53,71 1.104

IC601 Serial Flash VCC : -0.5V ~ 4.6V 8 3.29

IC7000 PVCC : -0.3V ~ 30V 17,18,19,31,32 25.4

IC7001 D/A Converter VDD : -0.3 ~ 20V 8,20 3.27

IC7002 PVCC : -0.3V ~ 30V 17,18,19,31,32 25.4

IC7003 D/A Converter VDD : -0.3 ~ 20V 8,20 3.27

IC7004 PVCC : -0.3V ~ 30V 17,18,19,31,32 25.4

IC7005 D/A Converter VDD : -0.3 ~ 20V 8,20 3.27

IC7006 PVCC : -0.3V ~ 30V 17,18,19,31,32 25.4

IC7007 D/A Converter VDD : -0.3 ~ 20V 8,20 3.27

Designator Desc. Voltage Spec Pin

Mearsured

Voltage

HDMI Board

IC800 HDMI

AVDD33 : 3.14V ~ 3.46V 14,33 3.33

IOVCC33 : 3.14V ~ 3.46V 63,88 3.29

SBVCC5V : 4.5V ~ 5.5V 45 5

AVDD10 : 0.95V ~ 1.05V 12,14,62,67,72,77 0.995

IC801 LDO Vin : 2.25V ~ 16V 2 6.17

IC802 LDO Vin : 2.5V ~ 6V 1 3.33

IC803 LDO Vin : 2.25V ~ 16V 2 3.66

Page 65

2-622-61

Location Value Capacitor (uF) Voltage Spec

100V-10% 240V/50Hz+10%

Measured voltage Measured voltage

SMPS Board

C905 68uF 460V 154.5V 310V

C906 68uF 460V 154.5V 310V

C911 100uF 50V 25.9V 26V

C919 1uF 50V 20.9V 20.9V

C928 1uF 50V 20.2V 20.3V

C951 1000uF 35V 25.9V 25.9V

C952 1000uF 35V 25.9V 25.9V

C953 1000uF 35V 25.9V 25.9V

Part Designator Voltage Spec Pin

Mearsured Voltage

#79 / #1

Remarks

MAIN

CN100 WLS_3V3 1 3.62 Wireless

CN104

VCC_5V 13 5.08

FRONT6.2VA 14 6.17

3.7VA 15,16 3.67

CN105

6.2VA 1 6.18

HDMI

3.7VA 2 3.67

VCC_5V 5 5.07

D_3.3V 8 3.29

CN200 WIFI_3.5VA 6 3.67 WIFI

CN300 25VA 1,2,3 25.3 SMPS

CN2011 3.3VA 1 3.28 BT

HDMI CN804

6.2VA 1 6.18

MAIN

3.7VA 2 3.67

VCC_5V 5 5.07

D_3.3V 8 3.29

FRONT

CN400

VCC_5V 13 5.08

MAIN6.2VA 14 6.17

3.7VA 15,16 3.66

CN401

F_3.3VA 4,6 3.44

LCDVCC_5V 7 5.07

6.2VA 10 5.78

2. CAPACITORS 3. CONNECTORS

Designator Voltage Spec Mearsured Voltage

Main & AMP Board

C7000 25V 25.4

C7039 25V 25.4

C7085 25V 25.4

C7088 25V 25.4

C7134 25V 25.4

C7137 25V 25.4

C7183 25V 25.4

Page 66

2-642-63

PRINTED CIRCUIT BOARD DIAGRAMS

1. SMPS P. C. BOARD DIAGRAM

(TOP VIEW)

(BOTTOM VIEW)

NOTE) Warning

Parts that are critical with respect to risk of fire or electrical shock.

Page 67

2-662-65

2. MAIN P. C. BOARD DIAGRAM

(TOP VIEW)

(BOTTOM VIEW)

Page 68

2-682-67

3. HDMI P. C. BOARD DIAGRAM

4. FRONT P. C. BOARD DIAGRAM

5. KEY P. C. BOARD DIAGRAM

(TOP VIEW)

(BOTTOM VIEW)

Page 69

2-702-69

Page 70

SECTION 3

CABINET & MAIN CHASSIS

CONTENTS

DISASSEMBLY INSTRUCTIONS ................................................................................................................... 3-3

EXPLODED VIEWS ......................................................................................................................................... 3-9

1. MAIN SET SECTION ................................................................................................................................ 3-9

2. WIRELESS SUBWOOFER SECTION .................................................................................................... 3-11

3. PACKING ACCESSORY SECTION ....................................................................................................... 3-13

3-1

Page 71

DISASSEMBLY INSTRUCTIONS

Before you begin, position the main set upside down.

1. Cover Bottom Assembly

1) Remove the 20 screws on the main set.

2) Remove the Cover Bottom Assembly.

Cover Bottom Assembly

2. Cover Back

1) Remove the 11 screws securing the Cover Back.

2) Detach the power cord from the Cover Back.

3) Remove the Cover Back.

Fig. 1

Cover Back

Fig. 2

3-2

Power Cord

Page 72

3. Chassis Main Assembly

KEY

MAIN

1) Remove the 10 (②) screws securing the Chassis Main Assembly.

2) Disconnect the Harness/FFC cables from the Main Board.

3) Remove the Chassis Main Assembly.

3 Chassis Main Assembly

MAIN

4. Key Board

1) Remove the 2 screws securing the Button Assembly.

2) Remove the Button Assembly (Bracket Button + Button).

3) Disconnect the Harness cable from the Key Board.

4) Remove the 2 screws securing the Key Board.

5) Remove the Key Board.

KEY

Button

Bracket Button

Fig. 3

Fig. 4

3-3

Page 73

5. SMPS Board

MAIN

HDMI

Chassis Cover

SMPS

1) Disconnect the Harness cable from the Main Board.

2) Remove the 4 (①) screws securing the SMPS Board.

3) Remove the SMPS Board.

6. Bluetooth Module

1) Disconnect the FFC cable from the Main Board.

2) Remove the Bracket BT.

3) Remove the Bluetooth Module.

MAIN

Bluetooth Module

Fig. 5

6. HDMI & Main Board

1) Remove the 4 screws securing the Chassis Cover.

2) Remove the Chassis Cover.

3) Remove the 5 screws securing the HDMI jack and the Chassis jack.

4) Remove the HDMI Board and the Chassis jack.

5) Remove the 2 (①) screws securing the Main Board.

6) Remove the Main Board.

Chassis Cover

SMPS

MAIN

HDMI

Chassis jack

Fig. 6

3-4

Page 74

7. Cover Top Assembly

1) Remove the 10 screws securing the Cover Top Assembly.

2) Remove the Cover Top Assembly.

Cover Top Assembly

[Reassembly CAUTION]

Fig. 7

3-5

Page 75

8. Wi-Fi Module

1) Remove the 2 screws securing the Bracket Wi-Fi.

2) Disconnect the Harness cable from the Wi-Fi Module.

3) Remove the Wi-Fi Module.

9. Wireless Module

1) Remove the 2 screws securing the Wireless Module.

2) Disconnect the FFC cable from the Wireless Module.

3) Remove the Wireless Module.

10. Case Chamber Assembly

1) Remove the 6 screws securing the Case Chamber Assembly.

2) Remove the Case Chamber Assembly.

Wi-Fi Module

Case Chamber Assembly

Wireless Module

Fig. 8

3-6

Page 76

11. Case Back Center

FRONT

1) Remove the 8 screws securing the Case Back Center.

2) Detach the EMI Gasket.

3) Remove the Case Back Center.

12. Front Board

1) Remove the 4 screws securing the Front Board.

2) Remove the Front Board.

FRONT

Fig. 9

Fig. 10

3-7

Page 77

3-8

Page 78

Wi-Fi

251

A51

250

A52

CABLE2

CABLE1

274L

274C

274R

SPK7001

SPK7000

SPK7002

272

273

272

506

270

271

A42

300

A44

SMPS

A47

HDMI

A48

MAIN

A46

A43

KEY

A55

255

464

320

464

470

254

464

470

253

252

250

470

330

331

464

263

261

464

465

280

282

281L

256

470

282

281R

464

A41

464

260

464

WIRELESS

A54

CABLE4

CABLE3

CABLE5

464

331

262

EXPLODED VIEWS

1. MAIN SET SECTION

NOTES) THE EXCLAMATION POINT WITHIN AN

EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE LITERATURE.

Page 79

A81M

A331

A332

A330

A81A

A81S

A81L

A81K

381

382

383

391

392

393

392

389

384

393

385

387

395

390

388

395

386

WIRELESS

LED

KEY

AMP

SMPS

2. WIRELESS SUBWOOFER SECTION

NOTES) THE EXCLAMATION POINT WITHIN AN

EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE LITERATURE.

Page 80

3. PACKING ACCESSORY SECTION

831 LAN cable

801 Owner’s manual

806 Optical cable

829 Cable tie

836 Screws (2)

839 IR Blaster

803 Main packing

808 Batteries (2)

832 Music Flow Bundle S/W

835 Wall bracket

837 Cover foot (2)

900 Remote control

802 Box

804 Bag

Page 81

3-163-15

Page 82

SECTION 4

WIRELESS SUBWOOFER PART

CONTENTS

ONE POINT REPAIR GUIDE ............................................................................................................................ 4-2

1. NO POWER PROBLEM ......................................................................................................................... 4-2

2. POWER ON ERROR (12 V, 5 VA) ......................................................................................................... 4-4

3. POWER ON ERROR (3.3 VA, 3 V) ........................................................................................................ 4-5

4. WIRELESS CONNECTION .................................................................................................................... 4-6

CIRCUIT DIAGRAMS ........................................................................................................................................ 4-7

1. WOOFER SMPS CIRCUIT DIAGRAM ................................................................................................... 4-7

2. WOOFER AMP CIRCUIT DIAGRAM ...................................................................................................... 4-9

3. WOOFER KEY CIRCUIT DIAGRAM .................................................................................................... 4-11

PRINTED CIRCUIT BOARD DIAGRAMS ....................................................................................................... 4-13

1. WOOFER SMPS P. C. BOARD ............................................................................................................ 4-13

2. WOOFER AMP P. C. BOARD .............................................................................................................. 4-15

3. WOOFER KEY P. C. BOARD ............................................................................................................... 4-15

4-1

Page 83

ONE POINT REPAIR GUIDE

BD901

F901

1. NO POWER PROBLEM

No power problem occurs when you power on the unit.

1-1. Fuse & Bridge diode 1-1-1. Solution

Replace F901, BD901 on SMPS board.

1-1-2. How to troubleshoot (Countermeasure)

1) Look at the physical of fuse F901.

2) Check the bridge diode BD901.

1-1-3. Service hint (Any picture / Remark)

< Fuse, F901 >

Can look at physical condition.

4-2

BD901

< Woofer SMPS board top view >

F901

Page 84

ONE POINT REPAIR GUIDE

D951

IC901

NO POWER PROBLEM

No power problem occurs when you power on the unit.

1-2. PVDD (36 V) abnormal 1-2-1. Solution

Replace D951, IC901.

1-2-2. How to troubleshoot (Countermeasure)

Case 1) PVDD (36 V) abnormal: Check D951 and replace it. Case 2) If case 1 is not problem: Check IC901 and replace it.

1-2-3. Service hint (Any picture / Remark)

D951

< Woofer SMPS board top view >

IC901

4-3

Page 85

ONE POINT REPAIR GUIDE

12 V

at WFC602

PVDD

at pin1 of WIC607

PVDD

at pin1 of WIC606

5 VA

at WFC601

2. POWER ON ERROR (12 V, 5 VA)

Fundamental power check points

2-1. 12 V

1) Check 12 V at WFC602.

2) If 12 V is not checked at the point, then find PVDD at pin1 of WIC607.

3) 1), 2) is NG  Replace WIC607.

If you can’t check PVDD voltage, then you replace woofer SMPS board.

at pin1 of WIC607

12 V

at WFC602

PVDD

< Woofer AMP board top view >

2-2. 5 VA

1) Check 5 VA at WFC601.

2) If 5 VA is not checked at the point, then find PVDD at pin1 of WIC606.

3) 1), 2) is NG  Replace WIC606.

If you can’t check PVDD voltage, then you replace woofer SMPS board.

5 VA

at WFC601

PVDD

at pin1 of WIC606

< Woofer AMP board top view >

4-4

Page 86

ONE POINT REPAIR GUIDE

3.3V_PWM at WL615

3.3 VA

at pin7, 8 of WIC603

3.3 VA

at WL613

3.3V_PWM at WL611

3. POWER ON ERROR (3.3 VA, 3 V)

MAIN SoC IC supply voltage check points

3-1. 3.3 VA

1) Check 3.3 VA at WL613 nearby WIC609.

2) Check 3.3 VA at pin7, 8 of WIC603.

3) Check 3.3V_PWM at WL611 nearby WIC608.

4) Check 3.3V_PWM at WL615 nearby WIC601.

If all voltages are OK, then check the PVDD voltage of woofer SMPS board.

3.3V_PWM at WL615

3.3 VA

at pin7, 8 of WIC603

3.3V_PWM at WL611

3.3 VA

at WL613

< Woofer AMP board top view >

4-5

Page 87

ONE POINT REPAIR GUIDE

3.3 VA

at WL616

Wireless module

Connection check

Pairing key

4. WIRELESS CONNECTION

Wireless connection malfunction

4-1. 3.3 VA

1) Check 3.3 VA at WL616.

4-2. Connection

1) Wireless module connection closely.

2) Implement Wireless Factory Reset.

 MAIN SET : Soundbar vol MIN and push Mute key (sustain 3 ~ 5 sec).  Subwofer :  Push Pairing key on the back case of the wireless subwoofer.

   The LED of of the wireless subwoofer blink red and green, pull out power cord.    The main set and the wireless subwoofer are factory reset mode, then power on.

3.3 VA

at WL616

Wireless module

Connection check

< Woofer AMP board top view >

Pairing key

< Woofer KEY board top view >

4-6

Page 88

CIRCUIT DIAGRAMS

1. WOOFER SMPS CIRCUIT DIAGRAM

No Power

BD901 is Defective

IMPORTANT SAFETY NOTE :

1. Shaded( ) parts are critical for safety. Replace only with specified part number.

2. Voltages are DC-measured with a digital voltmeter during Play mode.

No Power

D901 is Defective

No Power

Q901 is Defective

No Power

D951 is Defective

No Power

F901 is Defective

S/W Error

IC901 is Defective

Warning Parts that are shaded are critical with respect to risk of fire or electrical shock.

B C D E F G H I J K L M N O P Q R ST

S/W Error

PC901 is Defective

S/W Error

IC951 is Defective

EAX64877712 Rev1.0(0)

WF-SMPS

2014.12.10

4-84-7

Page 89

2. WOOFER AMP CIRCUIT DIAGRAM

EAX65142702 Rev1.0(0)

B C D E F G H I J K L M N O P Q R ST

WF-AMP

2014.01.28

4-104-9

Page 90

3. WOOFER KEY CIRCUIT DIAGRAM

EAX65385101 Rev1.0(0)

B C D E F G H I J

WF-KEY

2014.01.28

4-124-11

Page 91

PRINTED CIRCUIT BOARD DIAGRAMS

1. WOOFER SMPS P. C. BOARD

(TOP VIEW) (BOTTOM VIEW)

NOTE) Warning

Parts that are critical with respect to risk of fire or electrical shock.

4-144-13

Page 92

2. WOOFER AMP P. C. BOARD

(TOP VIEW) (BOTTOM VIEW)

3. WOOFER KEY P. C. BOARD

4-164-15

Page 93

4-184-17