LG FB162-A0U, FBS162V Service Manual

MODEL : FB162-A0U , FBS162V

SERVICE MANUAL

MODEL : FB162-A0U , FBS162V

CAUTION

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

MINI HOME THEATER

SERVICE MANUAL

Website http://biz.lgservice.com

Internal Use Only

SEPTEMBER, 2007

P/NO : AFN35036931

[CONTENTS]

SECTION 1 SUMMARY

• SERVICING PRECAUTIONS ................................................................................................... 1-2

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

• SPECIFICATIONS ......................................................................................................................1-5

SECTION 2 EXPLODED VIEWS

1. CABINET AND MAIN FRAME SECTION ................................................................................ 2-1

2. DECK MECHANISM SECTION (DP-10A) ............................................................................... 2-3

3. SPEAKER SECTION .............................................................................................................. 2-5

4. PACKING ACCESSORY SECTION......................................................................................... 2-6

SECTION 3 INTERNAL BLOCK DIAGRAM OF IC’s ...............................................3-1

SECTION 4 ELECTRICAL TROUBLESHOOTING GUIDE OF ADUIO PART .........4-1

SECTION 5 ELECTRICAL TROUBLESHOOTING GUIDE OF DVD PART .............5-1

SECTION 6 BLOCK DIAGRAM ................................................................................6-1

SECTION 7 CIRCUIT DIAGRAM & VOLTAGE CHART ...........................................7-1

SECTION 8 PRINTED CIRCUIT DIAGRAMS ...........................................................8-1

SECTION 9 REPLACEMENT PARTS LIST ..............................................................9-1

LGE Internal Use Only

1-2

NOTES REGARDING HANDLING OF THE PICK-UP

1. Notes for transport and storage

1) The pick-up should always be left in its conductive bag until immediately prior to use.

2) The pick-up should never be subjected to external pressure or impact.

2. Repair notes

1) The pick-up incorporates a strong magnet, and so should never be brought close to magnetic materials.

2) The pick-up should always be handled correctly and carefully, taking care to avoid external pressure and impact. If it is subjected to strong pressure or impact, the result may be an operational malfunction and/or damage to the printed-circuit board.

3) Each and every pick-up is already individually adjusted to a high degree of precision, and for that reason the adjustment point and installation screws should absolutely never be touched.

4) Laser beams may damage the eyes! Absolutely never permit laser beams to enter the eyes!

Also NEVER switch ON the power to the laser output part (lens, etc.) of the pick-up if it is damaged.

5) Cleaning the lens surface If there is dust on the lens surface, the dust should be cleaned away by using an air bush (such as used for camera lens). The lens is held by a delicate spring. When cleaning the lens surface, therefore, a cotton swab should be used, taking care not to distort this.

6) Never attempt to disassemble the pick-up. Spring by excess pressure. If the lens is extremely dirty, apply isopropyl alcohol to the cotton swab. (Do not use any other liquid cleaners, because they will damage the lens.) Take care not to use too much of this alcohol on the swab, and do not allow the alcohol to get inside the pick-up.

Storage in conductive bag

Drop impact

NEVER look directly at the laser beam, and don’t let contact fingers or other exposed skin.

Magnet

How to hold the pick-up

Conductive Sheet

Cotton swab

Pressure

SECTION 1 SUMMARY

SERVICING PRECAUTIONS

Only for training and service purposes

LGE Internal Use Only

1-3

NOTES REGARDING COMPACT DISC PLAYER REPAIRS

1. Preparations

1) Compact disc players incorporate a great many ICs as well as the pick-up (laser diode). These components are sensitive to, and easily affected by, static electricity. If such static electricity is high voltage, components can be damaged, and for that reason components should be handled with care.

2) The pick-up is composed of many optical components and other high-precision components. Care must be taken, therefore, to avoid repair or storage where the temperature of humidity is high, where strong magnetism is present, or where there is excessive dust.

2. Notes for repair

1) Before replacing a component part, first disconnect the power supply lead wire from the unit

2) All equipment, measuring instruments and tools must be grounded.

3) The workbench should be covered with a conductive sheet and grounded. When removing the laser pick-up from its conductive bag, do not place the pick-up on the bag. (This is because there is the possibility of damage by static electricity.)

4) To prevent AC leakage, the metal part of the soldering iron should be grounded.

5) Workers should be grounded by an armband (1M Ω)

6) Care should be taken not to permit the laser pick-up to come in contact with clothing, in order to prevent static electricity changes in the clothing to escape from the armband.

7) The laser beam from the pick-up should NEVER be directly facing the eyes or bare skin.

Resistor (1 Mohm)

Conductive Sheet

Resistor (1 Mohm)

Armband

LGE Internal Use Only

1-4

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.

Only for training and service purposes

LGE Internal Use Only

1-5

GENERAL

Power supply Refer to main label Power consumption Refer to main label Net Weight 3.31 kg External dimensions (W x H x D) 170 x 253 x 265 mm Operating conditions Temperature: 5°C to 35°C, Operation status: Horizontal Operating humidity 5% to 85%

CD/DVD

Laser Semiconductor laser, wavelength 650 nm Signal system NTSC 525/60, PAL 652/50 Frequency response (audio) 40 Hz to 2 kHz Signal-to-noise ratio (audio) More than 75 dB (1 kHz, NOP -3 dB, 20 kHz LPF/A-Filter) Dynamic range (audio) More than 75 dB Harmonic distortion (audio) 0.5 % (1 kHz, at 1W position) (20 kHz LPF)

VIDEO

Video output 1.0 V (p-p), 75 Ω, negative sync./ RCA jack x 1 COMPONENT VIDEO OUT (Y) 1.0 V (p-p), 75 ohms, negative sync, RCA jack x 1

(Pb)/(Pr) 0.7 V (p-p), 75 ohms, RCA jack x 1

Tuner FM

Tuning Range 87.5 - 108.0 MHz or 65.0 - 74.0 MHz, 87.5 - 108.0 MHz Intermediate Frequency 10.7 MHz Signal-to Noise Ratio 60/55 dB (Mono) Frequency Response 50 - 10,000 Hz

AM [ MW ]

Tuning Range 522 - 1,620 kHz or 520 - 1,720 kHz Intermediate Frequency 450 kHz

AMPLIFIER

Stereo mode 80 W + 80 W Output Power 80 W + 80 W T.H.D 0.5 % Frequency Response 40 - 20000 Hz Signal-to-noise ratio 75 dB

SPEAKERS

Type 3 Way 3 Speaker Impedance 4 Ω Frequency Response 70 - 20,000 Hz Sound Pressure Level 83 dB/W (1m) Rated Input Power 80 W Max. Input Power 160 W Net Dimensions (W x H x D) 128 x 295 x 240 mm Net Weight 4.1kg

SPECIFICATIONS

LGE Internal Use Only

Only for training and service purposes

LGE Internal Use Only

2-1 2-2

SECTION 2 EXPLODED VIEWS

1. CABINET AND MAIN FRAME SECTION

LGE Internal Use Only

463

252

463

250

CABLE1

262

261

NOTES) THE EXCLAMATION POINT WITHIN AN

463

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

264

468

P9701

463

CABLE3

A47

463

G

F

J

L

463

P9702

A50

K

CN303

P5701

CN302

A

C

463

A26

463

A

I

E

463

F

276

463

267

M

259

263

265

A43

257

B

253

CABLE2

463

L

H

300

275

A46

B

A52

J

I

H

K

G

E

463

M

273

463

63

4

274

A44

2-3 2-4

2. DECK MECHANISM SECTION (DP-10A)

Only for training and service purposes

LGE Internal Use Only

A26

012

019

013

017

439

014

435

015

018

015B

015A

016

012

440

030

001

002

003

432

A01

A02

020

012A

010

026

A03

036

025

439

024

431

435

012A

021

430

2-5

3. SPEAKER SECTION(FBS162V)

LGE Internal Use Only

A80

A80A

:LEFT SPK ASS'Y

A81

:RIGHT SPK ASS'Y

851

853

B

A80L

A80R

A

:LEFT CABINET ASS'Y

:RIGHT CABINET ASS'Y

855

C

850

852

854

857L 857R

A

C

B

856

854

858

859

861

863

854

864

860

862

2-6

4. PACKING ACCESSORY SECTION

Only for training and service purposes

LGE Internal Use Only

Antenna Loop

824

808

Battery

Antenna825

Remote control900

Instruction Ass'y801

Clear Sheet805

Packing803

Bag804

Plug Ass'y, 1Way(BLACK)

811

Plug Ass'y, 1Way(Red-White)813

804A

Accessory Bag

803A

Packing

Box802

3-1

SECTION 3 INTERNAL BLOCK DIAGRAM OF IC’S

1. µPD78F0546R(R)

• PIN CONFIGURATION(TOP VIEW)

LGE Internal Use Only

3-2

• BLOCK DIAGRAM

Only for training and service purposes

LGE Internal Use Only

3-3

• PIN FUNCTION

LGE Internal Use Only

3-4

Only for training and service purposes

LGE Internal Use Only

3-5

2. MC4580

• PIN CONFIGURATION

• TEST CIRCUIT

• ABSOLUTE MAXIMUM RATINGS (TA=25°C)

SYMBOL RATINGS UNITPARAMETER

Supply Voltage V+/V- ±18 V Input Voltage V

IC ±5 V

Differential Input Voltage V

ID ±30 V

Output Current I

o ±50 mA

Power Dissipation P

D 300 (SOP-8) mW

800 (DIP-8)

250(TSSOP-8) Operating Temperature Range Topr -40 to+85 °C Storage Temperature Range Tstg -40 to +125 °C

LGE Internal Use Only

1

IN1(-)

Vcc-

2

3

4

Vcc+

IN(-)

IN(+)

Vcc+OUT1

8

OUT2

7

6

IN2(-)IN1(+)

5

IN2(+)

OUTP

UT

Vcc-

3-6

3. IP9009

• PIN CONFIGURATION

• BLOCK DIAGRAM

• PIN DESCRIPTION

No SYMBOL I/O SYMBOL

1 FWD I Loading motor forward input 2 REV I Loading motor reverse input 3 CTL I Loading motor speed control 4 PS I Power save 5 IN1 I CH1 input 6 IN2 I CH2 input 7 SVCC - Signal power supply 8 PVCC1 - Power supply 1

9 VOL- O Loading driver output(-) 10 VOL+ O Loading driver output(+) 11 VO2- O CH2 driver output(-) 12 VO2+ O CH2 driver output(+) 13 VO1- O CH1 driver output(-) 14 VO1+ O CH1 driver output(+)

No SYMBOL I/O SYMBOL

15 VO4+ O CH4 driver output(+) 16 VO4- O CH4 driver output(-) 17 VO3+ O CH3 driver output(+) 18 VO3- O CH3 driver output(-) 19 GND - Ground 20 PVCC2 - Power supply 2 21 MUTE I Mute 22 IN3 I CH3 input 23 IN4 I CH4 input 24 Vdet I Reset controller input 25 Reset O Reset controller output 26 REOadj O Adjustable regulator feedback 27 REBadj O Adjustable regulator control 28 BIAS I Bias

Only for training and service purposes

LGE Internal Use Only

3-7

4. CY8C21434

• PIN CONFIGURATION

• PIN DESCRIPTION

SYMBOL DescriptionPin No.

Type

Digital Analog

1 IO I, M P0[1] Analog column mux input, integrating input. 2 IO M P2[7] 3 IO M P2[5] 4 IO M P2[3] 5 IO M P2[1] 6 IO M P3[3] In CY8C21434 part. 6 Power SMP Switch Mode Pump (SMP) connection to required external

components in CY8C21634 part. 7 IO M P3[1] In CY8C21434 part. 7 Power Vss Ground connection in CY8C21634 part. 8 IO M P1[7] I2C Serial Clock (SCL). 9 IO M P1[5] I2C Serial Data (SDA).

10 IO M P1[3] 11 IO M P1[1] I2C Serial Clock (SCL), ISSP-SCLK*. 12 Power Vss Ground connection. 13 IO M P1[0] I2C Serial Data (SDA), ISSP-SDATA*. 14 IO M P1[2] 15 IO M P1[4] Optional External Clock Input (EXTCLK). 16 IO M P1[6] 17 Input XRES Active high external reset with internal pull down. 18 IO M P3[0] 19 IO M P3[2] 20 IO M P2[0] 21 IO M P2[2] 22 IO M P2[4] 23 IO M P2[6] 24 IO I, M P0[0] Analog column mux input. 25 IO I, M P0[2] Analog column mux input. 26 IO I, M P0[4] Analog column mux input. 27 IO I, M P0[6] Analog column mux input. 28 Power Vdd Supply voltage. 29 IO I, M P0[7] Analog column mux input. 30 IO I, M P0[5] Analog column mux input. 31 IO I, M P0[3] Analog column mux input, integrating input. 32 Power Vss Ground connection.

LGE Internal Use Only

Vss

P0[3], A, I, M

A, I, M, P0[1]

M, P2[7 ] M, P2[5 ] M, P2[3 ] M, P2[1 ] M, P3[3 ] M, P3[1 ]

M, I2 C S CL , P1 [ 7 ]

32313029282726

1 2 3 4 5

(Top View )

6 7 8

9

10111213141516

M, P1[3]

P0[5], A, I, M

QFN

Vss

P0[7], A, I, M

Vdd

P0[6], A, I, M

P0[4], A, I, M

P0[2], A, I, M

25

P0[0 ], A , I, M

24

P2[6 ], M

23 22

P2[4 ], M P2[2 ], M

21

P2[0 ], M

20

P3[2 ], M

19

P3[0 ], M

18

XRES

17

M, P1[2]

M, P1[6]

M, I2C SCL, P1[1]

M, I2C SDA, P1[5]

M, EXTCLK, P1[4]

M, I2C SDA, P1[0]

3-8

5. BU2090

• PIN CONFIGURATION

• PIN DESCRIPTION

PIN NAME FUNCTION

TYPE

BU2092/F

BU2090/F/FS

BU2092/FV

1 1 1 DATA GN D 2 2 2 CLOCK Serial data input 3 3 3 LCK Data shift clock input

— 4 4 Q0 Data latch clock input

4 5 5 Q1 Parallel data output 5 6 6 Q2 Parallel data output 6 7 7 Q3 Parallel data output 7 8 8 Q4 Parallel data output 8 9 9 Q5 Parallel data output

9 10 10 Q6 Parallel data output 10 11 11 N.C. Parallel data output — — 12 N.C. Not connected — — 13 Q7 Not connected 11 12 14 Q8 Parallel data output 12 13 15 Q9 Parallel data output 13 14 16 Q10 Parallel data output 14 15 17 Q11 Parallel data output 15 16 18 OE Parallel data output — 17 19 VSS Output Enable 16 18 20 VDD Power supply

Only for training and service purposes

LGE Internal Use Only

BU2090 / F / FS BU2092 / F

16

VSS

DATA

CLOCK

Q0

Q1

Q2

Q3

Q4

1

2

3

4

5

6

7

8

Control circuit

12-bit shift register

Latch

Output buffer

(open drain)

VDD

15

Q11

14

Q10

13

Q9

12

Q8

11

Q7

10

Q6

9

Q5

BU2092FV

VSS

DATA

CLOCK

LCK

Q0

Q1

Q2

Q3

Q4

VSS

DATA

CLOCK

LCK

Q0

Q1

Q2

Q3

Q4

Q5

1

2

3

4

5

6

7

8

9

1

2

3

4

5

6

7

8

9

10

Control circuit

12-bit shift register

1

12-bit storage register

Output buffer

(open drain)

Control circuit

12-bit shift register

12-bit storage register

Output buffer (open drain)

18

V

DD

17

OE

16

Q11

15

Q10

14

Q9

13

Q8

12

Q7

11

Q6

10

Q5

20

V

DD

19

OE

18

Q11

17

Q10

16

Q9

15

Q8

14

Q7

13

N.C.

12

N.C.

11

Q6

3-9

6. AK5358

• PIN CONFIGURATION

• BLOCK DIAGRAM

LGE Internal Use Only

AINR AINL CKS1 VCOM AGND VA VD DGND

1 2 3 4 5 6 7 8

Top View

16 15 14 13 12 11 10

9

CKS0 CKS2 DIF PDN SCLK MCLK LRCK SDTO

AINL

AINR

VCOM

AGNDVA

Modulator

Vo

ltage Reference

CKS1

CKS2

CKS0

DGNDVD

Decimation

Filter

PDN

MCLK

Clock Divider

Serial I/O

Interface

DIF

LRCK SCLK

SDTO

3-10

• PIN DESCRIPTION

No PIN NAME I/O SYMBOL

1 AINR I Rch Analog Input Pin 2 AINL I Lch Analog Input Pin 3 CKS1 I Mode Select 1 Pin 4 VCOM O Common Voltage Output Pin, VA/2

Bias voltage of ADC input. 5 AGND - Analog Ground Pin 6 VA - Analog Power Supply Pin, 4.5 ~ 5.5V 7 VD - Digital Power Supply Pin, 2.7 ~ 3.6V 8 DGND - Digital Ground Pin 9 SDTO O Audio Serial Data Output Pin

“L” Output at Power-down mode.

10 LRCK I/O Output Channel Clock Pin

“L” Output in Master Mode at Power-down mode.

11 MCLK I Master Clock Input Pin

12 SCLK I/O Audio Serial Data Clock Pin

“L” Output in Master Mode at Power-down mode.

13 PDN I Power Down Mode & Reset Pin

“H”: Power up, “L”: Power down & Reset

The AK5358 must be reset once upon power-up.

14 DIF I Audio Interface Format Pin

“H”: 24bit I2S Compatible, “L”: 24bit MSB justified

15 CKS2 I Mode Select 2 Pin 16 CKS0 I Mode Select 0 Pin

Only for training and service purposes

LGE Internal Use Only

3-11

7. HT1000

• PIN CONFIGURATION

LGE Internal Use Only

DKD PACKAGE

(T

OP VIEW)

GVDD_B

OTW

SD

PWM_A

RESET_AB

PWM_B

OC_ADJ

GND AGND VREG

M3 M2 M1

PWM_C

RESET_CD

PWM_D

VDD

GVDD_C

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19

GVDD_A BST_A PVDD_A OUT_A GND_A GND_B OUT_B PVDD_B BST_B BST_C PVDD_C OUT_C GND_C GND_D OUT_D PVDD_D BST_D GVDD_D