LG NB3532A User manual

P/NO : AFN76153344 SEPTEMBER, 2013
300 W STYLISH & SLIM SOUND BAR
SERVICE MANUAL
MODEL: NB3532A
(NB3532A, S33A1-D)
CAUTION
BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS”
IN THIS MANUAL.
Website http://biz.lgservice.com
Internal Use Only
MODEL: NB3532A (NB3532A, S33A1-D)SERVICE MANUAL

1-1
CONTENTS
SECTION 1 ........ GENERAL
SECTION 2 ........ CABINET & MAIN CHASSIS
SECTION 3 ........ ELECTRICAL
SECTION 4 ........ REPLACEMENT PARTS LIST

1-2
SECTION 1
GENERAL
CONTENTS
ESD PRECAUTIONS ....................................................................................................................................... 1-3
MICOM HIDDEN KEY MODE ......................................................................................................................... 1-4
UPDATE PROGRAM ....................................................................................................................................... 1-5
SERVICE INFORMATION FOR EEPROM .................................................................................................... 1-5
SPECIFICATIONS............................................................................................................................................ 1-6

1-3
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.

1-4
HIDDEN MODE ENTRANCE KEY EXIT KEY DISPLAY RESULT
Version Check Front Stop + RMC
Play for 5s POWER OFF
M 1009303
E 1106151
T 1106301
TX35RX35
R 1007130
** ** ** ** ** **
1) Micom,
2) ESS,
3) Touch Key
4) wireless SPK
module TX,RX Ver
ex) TX35RX35
5) wireless SPK
Micom Ver
ex) W 1007130
6) EEPROM option
value (on Scroll)
EEPROM INITIAL Front Stop + RMC '0'
for 5s auto exit "E2P CLEAR" EEPROM initializing
EEPROM EDIT Front Stop + RMC '2'
for 5s Toggling OP0-10 Edit Micom option
Wireless spk
remate
Front Stop + RMC
mute Toggling "REMATE:" Connecting Wireless spk to main set
Clip Off Front Stop + RMC '8'
for 5s Toggling "CLIP OFF" To Test (output etc.)
Monitoring
Changed Gain
at Clip ON
Front Stop + RMC '8'
for 5s Toggling -0,0 dB Monitoring Changed Gain at Clip ON
MAX Volume Edit Front Stop + RMC
'Sleep' for 5s Toggling MVOL-XX For Max Volume setting (1 ~ 40)
MICOM HIDDEN KEY MODE

1-5
1) File Name
Model Name NB3530A
Micom Update Filename MICOM_NB3530_1301030_0xFE5C.hex
ESS Update Filename DSP_NB3530_1212261_7613.rom
Wireless Rx/Tx Module Update Filename WIRELESS.BIN
Wireless Rx Micom Update Filename WIRELESS_MICOM.HEX
Touch Key Filename TOUCH1_NB3530.DLD
2) File Name is in uppercase letters only.
3) PROGRAM DOWNLOAD
1. AUDIO MICOM
BOOTING ÖFUNCTION DISPLAY ÖUSB FUNCTION ÖCONNECTING THE USB
Ö“MICOM UP” DISPLAY ÖAFTER UPDATE , THE SET POWER OFF AUTOMATELY.
2. DSP
BOOTING ÖFUNCTION DISPLAY ÖUSB FUNCTION ÖCONNECTING THE USB Ö“DSP UP” DISPLAY
ÖAFTER UPDATE , THE SET POWER OFF AUTOMATELY.
3. TOUCH
BOOTING ÖFUNCTION DISPLAY ÖUSB FUNCTION ÖCONNECTING THE USB
Ö“T-UP 00” ~ “T-UP 90” DISPLAY ÖAFTER UPDATE , THE SET POWER OFF AUTOMATELY.
SERVICE INFORMATION FOR EEPROM
• FACTORY RESET: SET(STOP KEY) + REMOCON “2”
[ AUDIO MICOM OPTION CODE SETTING ]
SET(STOP KEY) + REMOCON “2” (MORE THAN 5 SECONDS) ÖCHANGE OPTION CODE WITH THE AR-
ROW KEY (REPEAT, PLAY/PAUSE, SKIP KEY) AND PRESS REMOCON STOP KEY ÖSET(STOP KEY) +
REMOCON “2” ÖCOMPLETED.
UPDATE PROGRAM

1-6
SPECIFICATIONS
• GENERAL
Power requirements 120 V ~ 60 Hz
Power consumption 40 W
Dimensions (W x H x D) 950 x 71 x 47 mm (37.4 x 2.8 x 1.9 inches)
Net Weight (Approx.) 2.5 kg (5.5 lbs)
Operating temperature 41 °F to 95 °F (5 °C to 35 °C)
Operating humidity 5 % to 90 %
Bus Power Supply (USB) DC 5 V 500 mA
• INPUTS
DIGITAL IN (OPTICAL IN) 3.0 Vrms (p-p), Optical jack x 2
PORT. IN 0.5 Vrms (3.5 mm stereo jack)
• AMPLIFIER
Stereo mode 80 W + 80 W (4 Ωat 1 kHz), THD 10%
Subwoofer 140 W (3 Ωat 60 Hz), THD 10%
• WIRELESS SUBWOOFER
Power requirements 120 V ~ 60 Hz
Power consumption 40 W
Type 1 Way 1 Speaker
Impedance 3 Ω
Rated Input Power 140 W
Max. Input Power 280 W
Dimensions (W x H x D) 196 x 390 x 297 mm (7.7 x 15.4 x 11.7 inches)
Net Weight 5.54 kg (12.2 lbs)
Designs and specifications are subject to change without prior notice.

2-1
SECTION 2
CABINET & MAIN CHASSIS
CONTENTS
EXPLODED VIEWS ......................................................................................................................................... 2-3
1. RECEIVER BAR SECTION (NB3530A) ................................................................................................... 2-3
2. WIRELESS SUBWOOFER SECTION (S33A1-D).................................................................................... 2-5
3. PACKING ACCESSORY SECTION ......................................................................................................... 2-7

2-2
MEMO

C
300
B
A
D
F
E
F
E
B
A
C
D
A44B
A44A
250L
250R
254
A42
463
A53 A54
256
254
A47
502
502
261
261
A46
262
502
263
465
465
251
252
253
463
502
502
502
253
CABLE5
CABLE7
CABLE2
CABLE3
CABLE1
SMPS
MAIN
FRONT
B/T
WIRELESS
A43
EXPLODED VIEWS
1. RECEIVER BAR SECTION (NB3532A)
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.

A
B
E
C
D
F
WIRELESS
SMPS
952
952
952
952
950
A47W
950
950
954
950
950
951
A54W
A900
953
A900A
A910
E
300W
F
D
C
B
A
AMP
950
A45W
2. WIRELESS SUBWOOFER SECTION (S33A1-D)
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.

2-7
804 Bag
802 Box
803 Main packing
803A Packing (Pad)
808 Batteries
806 Optical cable
835 Wall bracket
801 Owner’s manual
900 Remote control
829 Cable ties
for arranging cables
3. PACKING ACCESSORY SECTION

2-8
MEMO

3-1
SECTION 3
ELECTRICAL
CONTENTS
ONE POINT REPAIR GUIDE .......................................................................................................................... 3-2
1. RECEIVER BAR COMPONENT REPAIR GUIDE.................................................................................. 3-2
ELECTRICAL TROUBLESHOOTING GUIDE............................................................................................... 3-7
1. RECEIVER BAR TROUBLESHOOTING ................................................................................................ 3-7
WAVEFORMS OF MAJOR CHECK POINT ................................................................................................ 3-11
WIRING DIAGRAMS...................................................................................................................................... 3-15
1. RECEIVER BAR WIRING DIAGRAM ................................................................................................... 3-15
2. WIRELESS SUBWOOFER WIRING DIAGRAM................................................................................... 3-17
BLOCK DIAGRAMS ...................................................................................................................................... 3-19
1. RECEIVER BAR BLOCK DIAGRAMS.................................................................................................. 3-19
2. WIRELESS SUBWOOFER BLOCK DIAGRAM.................................................................................... 3-23
CIRCUIT DIAGRAMS .................................................................................................................................... 3-25
1. RECEIVER BAR CIRCUIT DIAGRAMS ............................................................................................... 3-25
CIRCUIT VOLTAGE CHART ........................................................................................................................ 3-37
PRINTED CIRCUIT BOARD DIAGRAMS.................................................................................................... 3-41
1. RECEIVER BAR PRINTED CIRCUIT BOARD DIAGRAMS................................................................. 3-41

3-2
ONE POINT REPAIR GUIDE
1. RECEIVER BAR ONE POINT REPAIR GUIDE
1-1. NO POWER PROBLEM
No power problem occurs when you power on the unit.
1-1-1. 23.5 VA
1-1-1-1. Solution
Replace F900, BD900, IC920, PC900, IC950.
1-1-1-2. How to troubleshoot (Countermeasure)
Case 1) No Standby LED: Check F900, BD900, IC920 and around components ÖReplace these.
Case 2) 23.5 VA abnormal: Check PC900, IC950 ÖReplace these.
1-1-1-3. Service hint (Any picture / Remark)
< SMPS board top view >
BD900
F900 IC920
PC900
IC950
BD900
F900
IC920 PC900
IC950

3-3
RECEIVER BAR ONE POINT REPAIR GUIDE
1-2. POWER ON ERROR
No display or Not working.
1-2-1. DC-DC Converter
1-2-1-1. Solution
Replace IC802 on MAIN board.
1-2-1-2. How to troubleshoot (Countermeasure)
1) Please check T801 voltage(12 V).
Please check CA807(Vkk), CA805(FL+), CA806(FL-).
2) If you cannot get 12 V, IC802 has problem.
If 12 V is OK and VKK, Fl+, FL- is not working, T801 is out of order.
1-2-1-3. Service hint (Any picture / Remark)
< MAIN board top view >
< MAIN board bottom view >
T801
IC802

3-4
RECEIVER BAR ONE POINT REPAIR GUIDE
1-3. NO SOUND
1-3-1. Portable or Optical Function
1-3-1-1. Solution
Replace IC301 or IC304 or Portable/ Optical Jack.
1-3-1-2. How to troubleshoot (Countermeasure)
1) Please check Portable input and Optical Input.
Please check ADC output(Pin9, 10, 13 - I2S signal).
Please check DSP input(Pin80, 94 - S/PDIF signal).
2) If you cannot find input signal, replace Portable/ Optical Jack.
If you cannot find ADC output I2S signal, replace IC304.
If you cannot find DSP input S/PDIF signal, replace IC301.
1-3-1-3. Service hint (Any picture / Remark)
< MAIN board top view >
IC301
IC304

3-5
RECEIVER BAR ONE POINT REPAIR GUIDE
NO SOUND
1-3-2. USB Function
1-3-2-1. Solution
Replace IC301 on MAIN board.
1-3-2-2. How to troubleshoot (Countermeasure)
1) Please check IC301(Pin112, 113) USB data signal.
If you cannot find IC301 USB data signal, replace IC301.
1-3-2-3. Service hint (Any picture / Remark)
< MAIN board top view >
IC301

3-6
RECEIVER BAR ONE POINT REPAIR GUIDE
1-4. NO AUDIO
1-4-1. All function
1-4-1-1. Solution
Replace IC301 or IC701.
1-4-1-2. How to troubleshoot (Countermeasure)
1) Please check IC301(Pin71, 74 and 69, 70) or IC701(Pin5, 6 and 14, 15).
PWM signal output (or input)
2) If you cannot find PWM signal, replace IC301.
If you can find signal PWM, replace IC701.
1-4-1-3. Service hint (Any picture / Remark)
< MAIN board top view >
< MAIN board bottom view >
IC301
IC701

3-7
ELECTRICAL TROUBLESHOOTING GUIDE
1. RECEIVER BAR TROUBLESHOOTING
1-1. POWER SUPPLY ON SMPS BOARD
No 24 VA
Replace F900 (same fuse).
Check or replace D921.
Replace BD900.
YES
YES
YES
NO
NO
F900 normal?
BD900 normal?
Replace TH900.
D921 normal?
YES
YES YES
NO
NO
TH900 normal?
Is the Vcc
(12 V ~ 24 V) supplied to IC920
Pin4?
Power Line of Main PCB is short.