LG NB-3540 Service Manual

MODEL: NB3540 (NB3540, S34A2-D)SERVICE MANUAL

Internal Use Only

Website http://biz.lgservice.com

Sound Bar System

SERVICE MANUAL

MODEL: NB3540

P/NO : AFN76793810 AUGUST, 2014

CAUTION

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

(NB3540, S34A2-D)

CONTENTS

SECTION 1 ........ GENERAL

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

SECTION 3 ........ ELECTRICAL

SECTION 4 ........ REPLACEMENT PARTS LIST

1-1

SECTION 1

GENERAL

CONTENTS

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

HIDDEN KEY MODE ........................................................................................................................................ 1-4

SOFTWARE UPDATE METHOD .................................................................................................................... 1-5

SERVICE INFORMATION FOR EEPROM .................................................................................................... 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

HIDDEN KEY MODE

• Status: Power ON

HIDDEN MODE ENTRANCE KEY EXIT KEY DISPLAY RESULT

1) ESS(DSP)

2) Touch Key

3) Wireless SPK module TX

4) Wireless SPK module RX

5) EQ

6) EEPROM option value (on Scroll)

Version Check

EEPROM INITIAL

EEPROM EDIT

Wireless Factory Reset

Wireless SPK RF change

Clip Off

Monitoring Changed Gain at Clip ON

CLIP Algorithm Edit

MAX Volume Edit

APD On/Off

Front 'Vol-' + RMC

Play for 3sec

Front 'Vol-' + RMC '0'

for 3sec

Front 'Vol-' + RMC '2'

for 3sec

Set volume "VOL MIN"

+ RMC 'mute' for 3sec

Front 'Vol-' + RMC '4'

for 3sec

Front 'Vol-' + RMC '8'

for 3sec

Front 'Vol-' + RMC '8'

for 3sec

Front 'Vol-' + RMC '9'

for 3sec

Front Stop + RMC

'Sleep' for 3sec

Front 'Vol-' + RMC '3'

for 3sec

E1311050 T1311050

POWER OFF

auto exit "E2P CLEAR" EEPROM initializing

Toggling "OP0-10" Edit Micom option

- "W RESET" -

-- -

Toggling "CLIP OFF" -

Toggling 00 00 -

-- -

Toggling MVOL-XX -

Toggling APD ON / APD OFF APD ON/OFF

TX 053 RX 156 Q1311050 01 E1 00 30 11

1-4

SOFTWARE UPDATE METHOD

USB update for NB5540/4540/3540

DSP_NB5540.rom is an update ﬁ le for NB5540 Main/DSP software. DSP_NB4540.rom is an update ﬁ le for NB4540 Main/DSP software. DSP_NB3540.rom is an update ﬁ le for NB3540 Main/DSP software.

EQ_PRG_NB5540.bin is an update ﬁ le for NB5540 EQ software. EQ_PRG_NB4540.bin is an update ﬁ le for NB4540 EQ software. EQ_PRG_NB3540.bin is an update ﬁ le for NB3540 EQ Software.

WIRELESS_TX.bin is an update ﬁ le for Wireless TX(MAIN SET) software.

WIRELESS_RX.bin is an update ﬁ le for Wireless TX(Woofer) software.

Step 1 : Creating a Firmware Update Device

You can create a ﬁ rmware update ﬁ les on your USB memory device(FAT32). To create a ﬁ rmware update in a USB memory device, copy the update ﬁ le to the USB device.

Preparation:

1. Insert a USB memory device into the PC.

2. Copy the latest version of ﬁ rmware update ﬁ les to the USB drive. (You do not need to create directory, the ﬁ les will be saved in the root directory.)

3. It is impossible to multiple update at same time. (It can’t select update ﬁ le. But, it has an update priority. An update priority is as follows. <DSP, Wireless RX, Wireless TX, EQ>)

The USB memory device should have at least 2 MB of free space to save the ﬁ rmware update ﬁ les.

Step 2 : Updating the speaker bar(NB5540/4540/3540)

If you copy a update ﬁ le to an USB memory, you can update.

1. Turn on the speaker bar and move to USB function.

2. Insert USB memory that contains the update ﬁ le of the latest ﬁ rmware version into the speaker bar.

- Insert the USB memory device to the USB port of the speaker bar. 3-1. If you insert an USB memory that contains the DSP update ﬁ le, it displays “DSP UP” on FLD. And it starts DSP update. Updating DSP Software will take about 1 minutes. 3-2. If you insert an USB memory that contains the EQ update ﬁ le, it displays “EQ UP” on FLD. And it starts EQ update. Updating EQ Software will take about 3 ~ 5 sec. 3-3. If you insert an USB memory that contains the WIRELESS TX update ﬁ le, it displays “UPDATE” on FLD. WR“00”indicates a progress percentage. And it starts Wireless TX update. Updating Wireless TX Software will take about 2 minutes. 3-4. If you insert an USB memory that contains the WIRELESS RX update ﬁ le, it displays “UPDATE” on FLD. SEND “00” indicates a progress percentage. And it starts Wireless RX update. Updating Wireless RX Software will take about 2 minutes.

CAUTION : Do not turn off the power during ﬁ rmware update.

4. After update, it turns off power automatically.

5. Disconnect the power cord of the main unit and the wireless subwoofer. and connect them again after the LED of the main unit and the wireless subwoofer is fully turned off.

6. The system now operates with the new version.

1-5

SERVICE INFORMATION FOR EEPROM

• FACTORY RESET: SET(“VOL-” KEY) + REMOCON “2”

[ AUDIO MICOM OPTION CODE SETTING ]

SET(“VOL-” KEY) + REMOCON “2” (MORE THAN 5 SECONDS) Ö CHANGE OPTION CODE WITH THE ARROW KEY (REPEAT, PLAY/PAUSE, SKIP KEY) AND PRESS REMOCON STOP KEY Ö SET(“VOL-” KEY) + REMOCON “2” Ö COMPLETED.

1-6

SPECIFICATIONS

• GENERAL (NB3540)

AC adapter requirements 100 - 240 V ~ 50 / 60 Hz, 25 V 2 A Power consumption 27 W Dimensions (W x H x D) (770 x 35 x 75) mm Net Weight (Approx.) 1.3 kg Operating temperature 5 °C to 35 °C (41 °F to 95 °F) Operating humidity 5 % to 90 %

• INPUT/OUTPUT

OPTICAL IN 3 V (p-p), Optical jack x 1 PORT. IN 0.5 Vrms (3.5 mm stereo jack) x 1 Available Digital Input Audio Sampling Frequency 32 kHz, 44.1 kHz, 48 kHz, 96 kHz

• USB

Version 1.1 Bus Power Supply 5 V 500 mA

• AMPLIFIER

Total 320 W Front 80 W x 2 (4 Ω at 1 kHz) Subwoofer 160 W (3 Ω at 80 Hz) THD 10 %

• WIRELESS SUBWOOFER (S34A2-D)

Power requirements 100 - 240 V ~ 50 / 60 Hz Power consumption 40 W Type 1 Way 1 Speaker Impedance 3 Ω Rated Input Power 160 W Max. Input Power 320 W Dimensions (W x H x D) (170 x 360 x 316) mm Net Weight (Approx.) 5.55 kg

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

1-7

MEMO

1-8

SECTION 2

CABINET & MAIN CHASSIS

CONTENTS

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

1. RECEIVER BAR SECTION (NB3540) ...................................................................................................... 2-3

2. WIRELESS SUBWOOFER SECTION (S34A2-D) .................................................................................... 2-5

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

2-1

MEMO

2-2

CONTENTS

SECTION 1 ........ GENERAL

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

SECTION 3 ........ ELECTRICAL

SECTION 4 ........ REPLACEMENT PARTS LIST

1-1

SECTION 1

GENERAL

CONTENTS

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

HIDDEN KEY MODE ........................................................................................................................................ 1-4

SOFTWARE UPDATE METHOD .................................................................................................................... 1-5

SERVICE INFORMATION FOR EEPROM .................................................................................................... 1-6

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

1-2