LG SH3B, SPH3B-W Service manual

SERVICE MANUAL

CAUTION

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

Internal Use Only

Wireless Sound Bar

OCTOBER, 2016P/NO : AFN77558515

MODEL: SH3B (SH3B, SPH3B-W)

MODEL: SH3B

(SH3B, SPH3B-W)

CONTENTS

SECTION 1 ........ GENERAL

SECTION 2 ........ CABINET & MAIN CHASSIS

SECTION 3 ........ ELECTRICAL

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

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

1-1

SECTION 1

GENERAL

CONTENTS

ESD PRECAUTIONS ......................................................................................................................................... 1-3

WIRELESS SUBWOOFER CONNECTION ....................................................................................................... 1-4

HIDDEN KEY MODE ......................................................................................................................................... 1-5

MCS / EQ PROGRAM UPDATE GUIDE ........................................................................................................... 1-6

SPECIFICATIONS ............................................................................................................................................. 1-7

1-2

ESD PRECAUTIONS

Electrostatically Sensitive Devices (ESD)

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

5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ESD devices.

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

7. Immediately before removing the protective material from the leads of a replacement ESD device, touch the protective material to the chassis or circuit assembly into which the device will by installed.

CAUTION : BE SURE NO POWER IS APPLIED TO THE CHASSIS OR CIRCUIT, AND OBSERVE ALL OTHER

SAFETY PRECAUTIONS.

8. Minimize bodily motions when handing unpackaged replacement ESD devices. (Otherwise 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 ESD device).

CAUTION. GRAPHIC SYMBOLS

THE LIGHTNING FLASH WITH APROWHEAD SYMBOL. WITHIN AN EQUILATERAL TRIANGLE, IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF UNINSULATED “DANGEROUS VOLTAGE” THAT MAY BE OF SUFFICIENT MAGNITUDE TO CONSTITUTE A RISK OF ELECTRIC SHOCK.

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

1-3

WIRELESS SUBWOOFER CONNECTION

LED indicator of wireless subwoofer

LED Color Status

Yellow-green (Blink)

Yellow-green The connection is completed.

Red/Yellow green (Blink alternately)

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.

Attempting to make connection.

The wireless subwoofer connection is initialized.

The power cord of wireless subwoofer is disconnected.

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

Manually pairing wireless subwoofer

When your connection is not completed, you can see the red LED or the blinking of yellow-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 by pressing VOL - button repeatedly until stanby LED on the main unit blinks slowly.

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

- The standby LED on the main unit blinks quickly.

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

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 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.

1-4

HIDDEN KEY MODE

HIDDEN MODE KEYS

USB Mode/ UPDATE Main unit ‘- (Volume)’ + Remote control ‘VOL +’

EEPROM EDIT Main unit ‘- (Volume)’ + Remote control ‘CINEMA’

EEPROM CLEAR (Initialize) Main unit ‘- (Volume)’ + Remote control ‘ASC’

VERSION CHECK Main unit ‘- (Volume)’ + Remote control ‘STANDARD’

CLIP OFF

Main unit ‘- (Volume)’ + Remote control ‘F (Function)’CLIP ON

CLIP ON GAIN MONITERING

MAX Volume Edit

CLIP Algorithm Edit Main unit ‘- (Volume)’ + Remote control ‘VOL -’

Wireless RF Change Main unit ‘- (Volume)’ + Remote control ‘WOOFER LEVEL +’

BYPASS Sound Effect Main unit ‘- (Volume)’ + Remote control ‘DRC ON’

APD Time Display Main unit ‘- (Volume)’ + Remote control ‘DRC OFF’

APD On/Off Main unit ‘- (Volume)’ + Remote control ‘AUTO POWER ON’

Up VOL +

Down VOL -

Right STANDARD

Left ASC

Enter CINEMA

TV Remote ON Remote control ‘DRC ON’ for 3 seconds.

TV Remote OFF Remote control ‘DRC OFF’ for 3 seconds.

USB Log Out Main unit ‘- (Volume)’ + Remote control ‘ (Power)’

Wireless Demo Mode Main unit ‘- (Volume)’ + Remote control ‘WOOFER LEVEL +’

Enter : Main unit ‘- (Volume)’ + Remote control ‘AUTO POWER OFF’ Setting : VOL +/- Exit : STANDARD

1-5

MCS / EQ PROGRAM UPDATE GUIDE

1. Preparation

- Remote control.

- Do format USB Memory to FAT32 File system.

- USB : Update ﬁ le exist only in the USB Memory stick. Ex ) SH3B : MCS  E:\PG540_FW_SH3B_Ver.bin (if USB driver is E:\) EQ  E:\EQ_PRG.BIN (if USB driver is E:\) Wireless Tx  E:\WIRELESS_TX.bin (if USB driver is E:\) Wireless Rx  E:\WIRELESS_RX.bin (if USB driver is E:\)

- Find the USB port. Remove the jack cover from the rear panel.

Jack cover

2. Update

1) Power on.

2) Press main unit “-” (volume -) key and remote control “VOL +” during 5 seconds. (USB Mode) OPTICAL and PORTABLE LEDs turn on.

[ Power ON ]

3) Insert USB.

4) Never remove USB or AC cord while updating.

5) After update ﬁ nish, power will be off automatically.

6) Power cord un-plug.

1-6

[ USB Mode ]

SPECIFICATIONS

• GENERAL

Power requirements Refer to main label. Power consumption Refer to main label. Networked standby : 0.5 W (If all network ports are activated.) Dimensions (W x H x D) Approx. 950 mm x 71 mm x 47 mm Net Weight Approx. 2.47 kg Operating temperature 5 °C to 35 °C Operating humidity 5 % to 90 %

• INPUTS

OPTICAL IN (Digital audio in) 3 V (p-p), Optical jack x 1 PORT. IN (Portable in) 0.5 Vrms (3.5 mm stereo jack) x 1 Available Digital Input Audio Sampling Frequency 32 kHz, 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz Available Digital Input Audio format Dolby Digital, DTS Digital Surround, PCM

• AMPLIFIER (RMS OUTPUT POWER)

Total 300 W Front 50 W x 2 (4 Ω at 1 kHz, 10% THD) Subwoofer 200 W (3 Ω at 80 Hz, 10% THD)

• WIRELESS SUBWOOFER

Power requirements Refer to main label on the subwoofer. Power consumption Refer to main label on the subwoofer. Type 1 Way 1 Speaker Impedance 3 Ω Rated Input Power 200 W Max. Input Power 400 W Dimensions (W x H x D) Approx. 171 mm x 390 mm x 261 mm Net Weight Approx. 5.6 kg

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

1-7

1-8

SECTION 2

CABINET & MAIN CHASSIS

CONTENTS

EXPLODED VIEWS ........................................................................................................................................... 2-3

1. MAIN SET SECTION ................................................................................................................................ 2-3

2. WIRELESS SUBWOOFER SECTION ...................................................................................................... 2-5

3. PACKING ACCESSORY SECTION ......................................................................................................... 2-7

2-1

2-2

A44A

254

A42

463

A54

256

254

A47

502

251

253

463

502

253

SPK703

SPK704

SMPS

FRONT

WIRELESS

252

CABLE2

258

A43

257

A52

B/T

255

CABLE1

502

A46

CABLE3

MAIN

463

A44B

261

262

502

263

502

264

300

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.

300W

954

955

WIRELESS

SMPS

AMP

A900

950

951

957

956

A900W

A45W

A54W

A47W

952

CN901

953

A49W

960

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.

3. PACKING ACCESSORY SECTION

801 Owner’s manual

808 Batteries (2)

803 Packing, Main

806 Optical cable

900 Remote control

804 Bag

802 Box

2-8

SECTION 3

ELECTRICAL

CONTENTS

ONE POINT REPAIR GUIDE ............................................................................................................................ 3-2

1. NO POWER PROBLEM (PVDD) ............................................................................................................ 3-2

2. POWER ON ERROR .............................................................................................................................. 3-3

3. NO SOUND (PORTABLE FUNCTION) .................................................................................................. 3-4

4. NO WIRELESS ....................................................................................................................................... 3-5

5. NO BLUETOOTH .................................................................................................................................... 3-6

6. NO SOUND (OPTICAL) .......................................................................................................................... 3-7

7. D(DC) PROTECTION ............................................................................................................................. 3-8

8. S(SHUT DOWN) PROTECTION............................................................................................................. 3-9

9. B(BURNT) PROTECTION .................................................................................................................... 3-10

WAVEFORMS OF MAJOR CHECK POINT .................................................................................................... 3-11

1. CRYSTAL .............................................................................................................................................. 3-11

2. FLASH MEMORY ................................................................................................................................. 3-12

3. TACT KEY ............................................................................................................................................. 3-13

4. USB ....................................................................................................................................................... 3-14

5. REMOTE CONTROL ............................................................................................................................ 3-15

6. OPTICAL ............................................................................................................................................... 3-16

7. PORTABLE ........................................................................................................................................... 3-17

8. AUDIO PWM ......................................................................................................................................... 3-18

9. AUDIO AMP .......................................................................................................................................... 3-20

WIRING DIAGRAM .......................................................................................................................................... 3-21

BLOCK DIAGRAMS ........................................................................................................................................ 3-23

1. SYSTEM BLOCK DIAGRAM ................................................................................................................ 3-23

2. POWER BLOCK DIAGRAM ................................................................................................................. 3-25

CIRCUIT DIAGRAMS ...................................................................................................................................... 3-27

1. SMPS CIRCUIT DIAGRAM .................................................................................................................. 3-27

2. MAIN - DSP CIRCUIT DIAGRAM ......................................................................................................... 3-29

3. MAIN - INTERFACE CIRCUIT DIAGRAM ............................................................................................ 3-31

4. MAIN - PWM & AMP CIRCUIT DIAGRAM ........................................................................................... 3-33

5. MAIN - POWER CIRCUIT DIAGRAM ................................................................................................... 3-35

6. FRONT CIRCUIT DIAGRAM ................................................................................................................ 3-37

CIRCUIT VOLTAGE CHART ........................................................................................................................... 3-39

1. ICs ......................................................................................................................................................... 3-39

2. CONNECTORS ..................................................................................................................................... 3-41

PRINTED CIRCUIT BOARD DIAGRAMS ....................................................................................................... 3-43

1. SMPS P. C. BOARD DIAGRAM ........................................................................................................... 3-43

2. MAIN P. C. BOARD DIAGRAM ............................................................................................................ 3-45

3. FRONT P. C. BOARD DIAGRAM ......................................................................................................... 3-47

3-1

ONE POINT REPAIR GUIDE

PVDD

CN601 pin4, 5, 6

1. NO POWER PROBLEM (PVDD)

No power problem occurs when you power on the unit.

1-1. Solution

Replace SMPS board.

1-2. How to troubleshoot (Countermeasure)

1) Check the PVDD voltage 24 V at pin4, 5, 6. When you check the no power at this point, then replace SMPS board.

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

< MAIN board top view >

PVDD

CN601 pin4, 5, 6

3-2

ONE POINT REPAIR GUIDE

L604

L618

Q601

pin2 (collector),

pin3 (base)

IC603 pin7

IC606 pin5

2. POWER ON ERROR

No display or Not working.

2-1. IC603

1) Check 12 VA at L604.

2) If 12 VA is not checked at the point, then find 24 V at pin7 of IC603.

3) 1), 2) is NG.  Replace IC603.

IC603 pin7

L604

< MAIN board top view >

2-2. IC606

1) Check 3.3 VA at L618.

2) If 3.3 VA is not checked at the point, then find 12 V at pin5 of IC606.

3) 1), 2) is NG.  Replace IC606.

IC606 pin5

L618

< MAIN board top view >

2-3. Q601

1) Check 12 V at the Collector of Q601 (pin2).

2) If 12 V is not checked at the point, then find 11 V at the Base of Q601 (pin3).

3) 1), 2) is NG.  Replace Q601.

Q601

pin2 (collector),

pin3 (base)

< MAIN board top view >

3-3

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