LG BH4120SN Schematic

MODEL: BH4120SN (BH4120SN, S42S2-S, S42S1-W)SERVICE MANUAL

Internal Use Only

Website http://biz.lgservice.com

Blu-ray

/ DVD

Home Cinema System

SERVICE MANUAL

MODEL: BH4120SN

P/NO : AFN75673460 FEBRUARY, 2012

(BH4120SN, S42S2-S, S42S1-W)

CAUTION

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

CONTENTS

SECTION 1 ........ SUMMARY

SECTION 2 ........ ELECTRICAL

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

SECTION 4 ........ MT8560 F/E LOADER PART

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

1-1

SECTION 1

SUMMARY

CONTENTS

PRODUCT SAFETY SERVICING GUIDELINES FOR BD-HTS PRODUCTS ............................................ 1-3

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

• GENERAL SERVICING PRECAUTIONS

• INSULATION CHECKING PRODEDURE

• ELECTROSTATICALLY SENSITIVE (ES) DEVICES

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

SOFTWARE UPGRADE .................................................................................................................................. 1-6

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

1-2

PRODUCT SAFETY SERVICING GUIDELINES

FOR BD-HTS 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.

CAUTION : CLASS 1M VISIBLE AND INVISIBLE LASER RADIATION WHEN OPEN. DO NOT VIEW DIRECTLY WITH OPTICAL INSTRUMENTS Use of controls, adjustments or the performance of procedures other than those specified herein may result in hazardous radiation exposure.

1-3

SERVICING PRECAUTIONS

CAUTION: Before servicing the BD-HTS covered by this 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 publications, always follow the safety precautions. Remember Safety First :

General Servicing Precautions

1. Always unplug the BD-HTS AC power cord from 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 polar-

ity installation of electrolytic capacitors may result in an explosion hazard.

2. Do not spray chemicals on or near this BD-HTS or any 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 whitch instruments covered by this service manual might be equipped.

5. Do not apply AC power to this BD-HTS and / or any of its electrical assemblies unless all solidstate 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.

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.)

1-4

HIDDEN KEY MODE

HIDDEN MODE

DISPLAY SYSTEM

INFORMATION

DISPLAY DEBUG

INFORMATION

EEPROM INITIAL

DOOR LOCK

WIRELESS SPK

REMATE

AVAILABLE

STATUS

(NO

DISC||OPEN)&&

(Highlight on 16:9

Full of setup menu)

(NO

DISC||OPEN)&&

(Highlight on 16:9

Full of setup menu)

POWER ON

STATUS

DVD FUNCTION and POWER ON

STATUS

POWER ON

STATUS

ENTRANCE KEY EXIT KEY DISPLAY

1+3+9+7+1+3+9+

ENTER or MP2

4+5+6+2+5+8+0+

ENTER

Front 'STOP' +

RMC '0' for 5s

Front 'STOP' +

RMC 'STOP' for 5s

Front 'STOP' +

RMC 'MUTE'

PAUSE or HOME

※ 'Pause' Key

FACTORY RESET

RETURN/PAUSE

Auto exit "E2P CLEAR"

Toggling

SYSTEM

INFORMATION

(KEY, VERSION)

1. PLATFORM INFORMATION

2. HDMI CONNECTTON INFORMATION

3. WIRELESS INFORMATION

"Locked" display

for 3s

"REMATE"

1-5

SOFTWARE UPGRADE

• Burn a DVD recordable disc or USB with a ﬁ le that is named to “LG_HB_7000M51.ROM”.

• Insert a upgrading disc or USB.

• Show help message for disc upgrade as follows.

Press Enter key to upgrade

Press Enter key to upgrade and it will show progress information

After completing upgrade then power is off.

1-6

SPECIFICATIONS

• GENERAL

Power requirements Refer to main label on the side panel. Power consumption Refer to main label on the side panel. Dimensions (W x H x D) Approx. 360 x 60.5 x 304 mm Net Weight (Approx.) 2.5 kg Operating temperature 5 °C to 35 °C (41 °F to 95 °F) Operating humidity 5 % to 90 %

• INPUTS / OUTPUTS

VIDEO OUT 1.0 V (p-p), 75 Ω, sync negative, RCA jack x 1 HDMI OUT (video/audio) 19 pin (Type A, HDMI™ Connector) ANALOG AUDIO IN 2.0 Vrms (1 kHz, 0 dB), 600 Ω, RCA jack (L, R) x 1 PORT. IN 0.5 Vrms (3.5 mm stereo jack)

• TUNER

FM Tuning Range 87.5 to 108.0 MHz or 87.50 to 108.00 MHz

• AMPLIFIER

Power output (3 Ω/ 4 Ω), (RMS), THD 10 % Total 330 W Front 42 W x 2 Center 42 W Rear 42 W x 2 Sub-Woofer 120 W (Passive)

• SYSTEM

Laser Semiconductor laser Wavelength 405 nm / 650 nm Signal system Standard PAL/NTSC color TV system Frequency response 20 Hz to 18 kHz (48 kHz, 96 kHz, 192 kHz sampling) Harmonic distortion Less than 0.05 % Dynamic range More than 80 dB Bus Power Supply (USB) DC 5 V 500 mA

1-7

• SPEAKERS Front speaker (Left/ Right)

Type 1 Way 1 speaker Impedance Rated 3 Ω Input Power 42 W Max. Input power 84 W Net Dimensions (W x H x D) 92.5 x 115 x 79 mm Net Weight 0.39 kg

Rear speaker (Left/ Right)

Type 1 Way 1 speaker Impedance Rated 3 Ω Input Power 42 W Max. Input power 84 W Net Dimensions (W x H x D) 92.5 x 115 x 79 mm Net Weight 0.39 kg

Center speaker

Type 1 Way 1 speaker Impedance Rated 3 Ω Input Power 42 W Max. Input power 84 W Net Dimensions (W x H x D) 92.5 x 115 x 79 mm Net Weight 0.39 kg

Subwoofer

Type 1 Way 1 speaker Impedance Rated 4 Ω Input Power 120 W Max. Input power 240 W Net Dimensions (W x H x D) 156 x 325 x 320 mm Net Weight 3.6 kg

• Design and specifications are subject to change without notice.

1-8

SECTION 2 ELECTRICAL

CONTENTS

DIGITAL DISPLAY & MEDIA TRAINING MASTER

1. DISTORTED PICTURE ..................................... 2-2

2. NO PICTURE .................................................... 2-7

3. PICTURE COLOR ........................................... 2-12

4. NOISE/AUDIO PROBLEMS ............................ 2-14

5. MISCELLANEOUS .......................................... 2-17

6. BD-HTS ........................................................... 2-26

................................ 2-2

ONE POINT REPAIR GUIDE ............................. 2-27

1. NO POWER PROBLEM .................................. 2-27

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

WAIT”ON FRONT PANEL ..............................2-29

3. BAD HDMI VIDEO / AUDIO OUTPUT ............ 2-38

4. NO SPEAKER OUTPUT ................................. 2-39

ELECTRICAL TROUBLESHOOTING GUIDE .. 2-40

1. SYSTEM POWER SUPPLY ON

SMPS BOARD ................................................ 2-40

2. AMP POWER SUPPLY ON SMPS BOARD ... 2-41

3. POWER SUPPLY ON MAIN BOARD ............. 2-42

4. SYSTEM PART ............................................... 2-43

5. NO CVBS VIDEO OUTPUT ............................ 2-44

6. NO AUDIO OUTPUT ....................................... 2-44

7. NO HDMI OUTPUT ......................................... 2-46

WAVEFORMS ...................................................... 2-47

1. SYSTEM PART - 1 ......................................... 2-47

2. SYSTEM PART - 2 (SYSTEM MEMORY) ...... 2-48

3. VIDEO PART (100 % FULL COLOR - BAR) .. 2-49

4. AUDIO PART (I2S) .........................................2-49

5. HDMI PART .................................................... 2-50

WIRING DIAGRAM ............................................. 2-53

BLOCK DIAGRAM .............................................. 2-55

CIRCUIT DIAGRAMS ......................................... 2-57

1. SMPS - POWER CIRCUIT DIAGRAM ............ 2-57

2. MAIN - CPU CIRCUIT DIAGRAM ................... 2-59

3. MAIN - MEMORY CIRCUIT DIAGRAM .......... 2-61

4. MAIN - LOADER CIRCUIT DIAGRAM ............ 2-63

5. MAIN - MICOM CIRCUIT DIAGRAM .............. 2-65

6. MAIN - HDMI CIRCUIT DIAGRAM ................. 2-67

7. MAIN - ADC/DIR CIRCUIT DIAGRAM ............ 2-69

8. MAIN - DSP CIRCUIT DIAGRAM ................... 2-71

9. MAIN - POWER CIRCUIT DIAGRAM ............. 2-73

10. MAIN - I/O CIRCUIT DIAGRAM ...................... 2-75

11. PWM & AMP CIRCUIT DIAGRAM .................. 2-77

12. JACK CIRCUIT DIAGRAM .............................. 2-79

13. FRONT CIRCUIT DIAGRAM ..........................2-81

CIRCUIT VOLTAGE CHART ............................. 2-83

PRINTED CIRCUIT BOARD DIAGRAMS ......... 2-85

1. SMPS P. C. BOARD ....................................... 2-85

2. MAIN P. C. BOARD ........................................ 2-87

3. AMP P.C.BOARD ............................................ 2-89

4. JACK P. C. BOARD ........................................ 2-91

5. FRONT P. C. BOARD ..................................... 2-91

2-1

DIGITAL DISPLAY & MEDIA TRAINING MASTER

Objective: To provide clear and concise guidelines for customer service agents to handle calls on

box goods calls.

1. DISTORTED PICTURE

1-1. Lines on Picture

Distorted picture refers to the customer getting video, but there is a problem with the video.

Determine what cables the customer is using to connect the BD to the TV

What cables is the customer

using to connect the BD?

YES

Tighten any loose cables. Make sure the customer is not connecting a BD

to VCR or BD to DVD Recorder. Copy protection can distort the picture on

and if connected properly. Refer to OM for connections.

older DVD models.

Is the TV set to the correct input?

YES

Do lines appear when watching

multiple discs?

YES

Do lines appear when watching a

TV program?

YES

Do lines appear when the BD is

connected to another TV?

Make sure the TV is on the correct input. Turn TV off, then on to

determine input. Video when using composite, or component.

DVI when using DVI, and HDMI when using HDMI.

One disc displaying the issue is a problem with the disc. Multiple discs

displaying the problem could indicate the BD lens needs to be cleaned.

Recommend the customer use a lens cleaner on the BD. A lens cleaner

is available at any local electronics retailer.

Lines appearing when watching a TV program indicates an issue with the

display. If the TV program is fine, then connect the BD to another input on

the display to determine if the problem is following the BD.

Connect the BD to another TV and play a disc. No lines during disc play

back indicates a problem with the first TV. Please refer to the owners manual for instructions on how to connect the BD to a TV. If the BD has a problem on the second TV, then see service chart for service information.

YES

Has the customer tried another

set of cables?

Have the customer try another set of cables. A bad cable can also cause

video problems. Test the cable with another device to the TV to also

determine if the TV is bad. If BD is problem, please see service chart for

service information.

2-2

DIGITAL DISPLAY & MEDIA TRAINING MASTER

1-2. Ghost Picture

Distorted picture refers to the customer getting video, but there is a problem with the video.

Determine what cables the customer is using to connect the BD to the TV

What cables is the customer

using to connect the BD?

YES

and if connected properly. Refer to OM for connections. Tighten any loose

cables. Make sure the customer is not connecting a BD to VCR or BD to

DVD Recorder. Copy protection can distort the picture on older VCR

models.

Is the TV set to the correct input?

YES

Do ghosting appear when

watching multiple discs?

YES

Do lines appear when watching a

TV program?

YES

Does ghosting appear when

the BD is connected to another

TV?

Make sure the TV is on the correct input. Turn TV off, then on to

determine input. Video when using composite, or component.

DVI when using DVI, and HDMI when using HDMI.

One disc displaying the issue is a problem with the disc. Multiple discs

displaying the problem could indicate the BD lens needs to be cleaned.

Recommend the customer use a lens cleaner on the BD.

A lens cleaner is available at any local electronics retailer.

Ghosting appearing when watching a TV program indicates an issue with

the display. If the TV program is fine, then connect theBD to another input

on the display to determine if the problem is following the BD.

Connect the BD to another TV and play a disc. No ghosting during disc

play back indicates a problem with the first TV. Please refer to the owners manual for instructions on how to connect the BD to a TV. If the BD has a problem on the second TV, then see service chart for service information.

YES

Has the customer tried another

set of cables?

Have the customer try another set of cables. A bad cable can also cause

video problems. Test the cable with another device to the TV to also

determine if the TV is bad. If BD is problem, please see service chart for

service information.

2-3

DIGITAL DISPLAY & MEDIA TRAINING MASTER

1-3. Rolling Picture

Distorted picture refers to the customer getting video, but there is a problem with the video.

Determine what cables the customer is using to connect the BD to the TV

What cables is the customer

using to connect the BD?

YES

and if connected properly. Refer to OM for connections. Tighten any loose

cables. Make sure the customer is not connecting a BD to VCR or BD to

DVD Recorder. Copy protection can distort the picture on older VCR

models.

Is the TV set to the correct input?

YES

Does rolling appear when

watching multiple discs?

YES

Does rolling appear when

watching a TV program?

YES

Does rolling appear when the BD

is connected to another TV?

Make sure the TV is on the correct input. Turn TV off, then on to

determine input. Video when using composite, or component.

DVI when using DVI, and HDMI when using HDMI.

One disc displaying the issue is a problem with the disc. Multiple discs

displaying the problem could indicate the BD lens needs to be cleaned.

Recommend the customer use a lens cleaner on the BD. A lens cleaner

is available at any local electronics retailer.

Rolling appearing when watching a TV program indicates an issue with the display. If the TV program is fine, then connect the BD to another input

on the display to determine if the problem is following the BD.

Connect the BD to another TV and play a disc. No lines during disc play

YES

Has the customer tried another

set of cables?

Have the customer try another set of cables. A bad cable can also cause

video problems. Test the cable with another device to the TV to also

determine if the TV is bad. If BD is problem, please see service chart for

service information.

2-4

DIGITAL DISPLAY & MEDIA TRAINING MASTER

1-4. Shaky Picture

Distorted picture refers to the customer getting video, but there is a problem with the video.

Determine what cables the customer is using to connect the BD to the TV

What cables is the customer

using to connect the BD?

YES

and if connected properly. Refer to OM for connections. Tighten any loose

cables. Make sure the customer is not connecting a BD to VCR or BD to

DVD Recorder. Copy protection can distort the picture on older VCR

models

Is the TV set to the correct input?

YES

Does shaking appear when

watching multiple discs?

YES

Does shaking appear when

watching a TV program?

YES

Does shaking appear when the

BD is connected to another TV?

Make sure the TV is on the correct input. Turn TV off, then on to

determine input. Video when using composite, or component.

DVI when using DVI, and HDMI when using HDMI.

One disc displaying the issue is a problem with the disc. Multiple discs

displaying the problem could indicate the BD lens needs to be cleaned.

Recommend the customer use a lens cleaner on the BD.

A lens cleaner is available at any local electronics retailer.

Shaking appearing when watching a TV program indicates an issue with

the display. If the TV program is fine, then connect the BD to another

input on the display to determine if the problem is following the BD.

Connect the BD to another TV and play a disc. No shaking during disc

YES

Has the customer tried another

set of cables?

Have the customer try another set of cables. A bad cable can also cause

video problems. Test the cable with another device to the TV to also

determine if the TV is bad. If BD is problem, please see service chart for

service information.

2-5

DIGITAL DISPLAY & MEDIA TRAINING MASTER

1-5. Blurry Picture

Distorted picture refers to the customer getting video, but there is a problem with the video.

Determine what cables the customer is using to connect the BD to the TV

What cables is the customer

using to connect the BD?

YES

and if connected properly. Refer to OM for connections. Tighten any loose

cables. Make sure the customer is not connecting a BD to VCR or BD to

DVD Recorder. Copy protection can distort the picture on older VCR

models

Is the TV set to the correct input?

YES

Does blurriness appear when

watching multiple discs?

YES

Does blurriness appear when

watching a TV program?

YES

Does blurriness appear when the

BD is connected to another TV?

Make sure the TV is on the correct input. Turn TV off, then on to

determine input. Video when using composite, or component.

DVI when using DVI, and HDMI when using HDMI.

One disc displaying the issue is a problem with the disc. Multiple discs

displaying the problem could indicate the BD lens needs to be cleaned.

Recommend the customer use a lens cleaner on the BD. A lens cleaner is

available at any local electronics retailer.

Blurriness appearing when watching a TV program indicates an issue

with the display. If the TV program is fine, then connect the BD to another

input on the display to determine if the problem is following the BD.

Connect the BD to another TV and play a disc. No blurriness during disc

YES

Has the customer tried another

set of cables?

Have the customer try another set of cables. A bad cable can also cause

video problems. Test the cable with another device to the TV to also

determine if the TV is bad. If BD is problem, please see service chart for

service information.

2-6

DIGITAL DISPLAY & MEDIA TRAINING MASTER

2. NO PICTURE

2-1. Black Screen

The entire screen is black.

Does the BD on-screen menu

appear?

YES

What cables is the customer

using to connect the BD?

YES

Is the TV set to the correct input?

YES

Is the customer able to watch TV

programming?

Make sure the customer did not select 480i resolution in the menu of BD-

HTS if using HDMI connections. Change resolution on upconversion BD-

HTS by pushing the resolution button of the remote controller. HDMI don’t

support 480i resolution.

Determine what cables the customer is using to connect the BD to the TV

and if connected properly. Refer to OM for connections. Tighten any loose

cables. Make sure the customer is not connecting a BD to VCR or BD to

DVD Recorder. Copy protection can distort the picture on older VCR

models.

Make sure the TV is on the correct input. Turn TV off, then on to

determine input. Video when using composite, or component.

DVI when using DVI, and HDMI when using HDMI.

If the customer is not able to watch television then he may have a

problem with his television, especially if the cable signal comes through

on a different input. If the customer can not get a TV program, then he still

may have a problem with the particular input on his TV.

YES

Can the customer connect the

BD to another TV?

YES

Has the customer tried another

set of cables?

Have the customer connect the BD to another TV in order to determine

if the problem is the BD or the TV. Refer to the OM for connections

assistance. If the BD works on the second TV, then the customer has a

problem with his TV.

Have the customer try another set of cables. A bad cable can also cause

video problems. Test the cable with another device to the TV to also

determine if the TV is bad. If BD is problem, please see service chart for

service information.

2-7

DIGITAL DISPLAY & MEDIA TRAINING MASTER

2-2. Blue Screen

The entire screen is a solid blue color.

Does the BD on-screen menu

appear?

YES

What cables is the customer

using to connect the BD?

YES

Is the TV set to the correct input?

YES

Is the customer able to watch TV

programming?

Make sure the customer did not select 480i resolution in the menu of BD-

HTS if using HDMI connections. Change resolution on upconversion BD-

HTS by pushing the resolution button of the remote controller. HDMI don’t

support 480i resolution.

Determine what cables the customer is using to connect the BD to the TV

and if connected properly. Refer to OM for connections. Tighten any loose

cables. Make sure the customer is not connecting a BD to VCR or BD to

DVD Recorder. Copy protection can distort the picture on older VCR

models.

Make sure the TV is on the correct input. Turn TV off, then on to

determine input. Video when using composite, or component.

DVI when using DVI, and HDMI when using HDMI.

If the customer is not able to watch television then he may have a problem

with his television, especially if the cable signal comes through on a

different input. If the customer can not get a TV program, then he still may

have a problem with the particular input on his TV.

YES

Can the customer connect the

BD to another TV?

YES

Has the customer tried another

set of cables?

Have the customer connect the BD to another TV in order to determine

if the problem is the BD or the TV. Refer to the OM for connections

assistance. If the BD works on the second TV, then the customer has a

problem with his TV.

Have the customer try another set of cables. A bad cable can also cause

video problems. Test the cable with another device to the TV to also

determine if the TV is bad. If BD is problem, please see service chart for

service information.

2-8

DIGITAL DISPLAY & MEDIA TRAINING MASTER

2-3. Snowy Screen

A snowy picture is when black and white dots are all over the screen.

Does the BD on-screen menu

appear?

YES

What cables is the customer

using to connect the BD?

YES

Is the TV set to the correct input?

YES

Is the customer able to watch TV

programming?

Make sure the customer did not select 480i resolution in the menu of BD-

HTS if using HDMI connections. Change resolution on upconversion BD-

HTS by pushing the resolution button of the remote controller. HDMI don’t

support 480i resolution.

Determine what cables the customer is using to connect the BD to the TV

and if connected properly. Refer to OM for connections. Tighten any

loose cables. Make sure the customer is not connecting a BD to VCR or

BD to DVD Recorder. Copy protection can distort the picture on older

VCR models.

Make sure the TV is on the correct input. Turn TV off, then on to

determine input. Video when using composite, or component.

DVI when using DVI, and HDMI when using HDMI.

If the customer is not able to watch television then he may have a

problem with his television, especially if the cable signal comes through

on a different input. If the customer can not get a TV program, then he still

may have a problem with the particular input on his TV.

YES

Can the customer connect the

BD to another TV?

YES

Has the customer tried another

set of cables?

Have the customer connect the BD to another TV in order to determine

if the problem is the BD or the TV. Refer to the OM for connections

assistance. If the BD works on the second TV, then the customer has a

problem with his TV.

Have the customer try another set of cables. A bad cable can also cause

video problems. Test the cable with another device to the TV to also

determine if the TV is bad. If BD is problem, please see service chart for

service information.

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DIGITAL DISPLAY & MEDIA TRAINING MASTER

2-4. No Signal

A “no signal” message appears on the screen of the display.

Does the BD on-screen menu

appear?

YES

What cables is the customer

using to connect the BD?

YES

Is the TV set to the correct input?

YES

Is the customer able to watch TV

programming?

Make sure the customer did not select 480i resolution in the menu of BD-

HTS if using HDMI connections. Change resolution on upconversion BD-

HTS by pushing the resolution button of the remote controller. HDMI don’t

support 480i resolution.

Determine what cables the customer is using to connect the BD to the TV

and if connected properly. Refer to OM for connections. Tighten any

loose cables. Make sure the customer is not connecting a BD to VCR or

BD to DVD Recorder. Copy protection can distort the picture on older

VCR models.

Make sure the TV is on the correct input. Turn TV off, then on to

determine input. Video when using composite, or component.

DVI when using DVI, and HDMI when using HDMI.

If the customer is not able to watch television then he may have a

problem with his television, especially if the cable signal comes through

on a different input. If the customer can not get a TV program, then he still

may have a problem with the particular input on his TV.

YES

Can the customer connect the

BD to another TV?

YES

Has the customer tried another

set of cables?

Have the customer connect the BD to another TV in order to determine

if the problem is the BD or the TV. Refer to the OM for connections

assistance. If the BD works on the second TV, then the customer has a

problem with his TV.

Have the customer try another set of cables. A bad cable can also cause

video problems. Test the cable with another device to the TV to also

determine if the TV is bad. If BD is problem, please see service chart for

service information.

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DIGITAL DISPLAY & MEDIA TRAINING MASTER

2-5. Invalid Format or Format Not Supported

Is the customer using a digital

cable connection?

YES

Is the customer using an analog

cable connection?

YES

Is the display HDCP compliant?

YES

Has the customer tried the device

on another display?

Customer’s using an DVI, or HDMI cable connection need to set the

resolution on the product above 480i. HDMI, DVI connections can not

process a 480i resolution. They can only process a 480p, 720p, 1080i, or

1080p resolution.

Make sure the customer’s simultaneously connecting analog component

cable with HDMI cable. And then If Copy Protected Disc is playing back,

analog component output is no picture. Only when the analog output is

480i, you can see the picture. In case of No Copy Protected Disc, you can

see the picture regardless of the resolution.

Make sure the display is HDCP compliant when using a DVI or HDMI

connection. A lack of HDCP compliancy on the display may cause an invalid format or format not supported message to appear. It can also

cause a copy protection OSD to appear.

Ask the customer to connect the device to another display. If the device

starts working, then the problem may be the original display.

The customer will need to troubleshoot the display. If the device still

does not work, then the problem may be the device or the cable.

YES

Has the customer tried another

cable?

Ask the customer to replace the cable between the device and display.

If the problem is corrected, then the problem was with the cable. If the

problem continues, then the device is the problem. Set up service

according to in warranty or out of warranty procedures.

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DIGITAL DISPLAY & MEDIA TRAINING MASTER

3. PICTURE COLOR

3-1. No Color

The video displays no color and only shows in black and white.

What cables is the customer

using to connect the BD?

YES

Is the TV set to the correct input?

YES

Does color appear when

watching multiple discs?

YES

Does color appear when

watching a TV program?

Determine what cables the customer is using to connect the BD to the

TV and if connected properly. Refer to OM for connections. Tighten any

loose cables. Make sure the customer is not connecting a BD to VCR.

Copy protection can distort the picture on older VCR models.

Make sure the TV is on the correct input according to the connections in

use. Video when using composite, or component. DVI when using DVI,

and HDMI when using HDMI.

One disc displaying the issue is a problem with the disc. Make sure the

discs the customer is using are compatible with the BD by checking

“playable discs” in the owners manual. Multiple discs displaying the

problem indicates a problem with BD-HTS.

If the cable or satellite programming is connected through another input

and the customer does not get color, the customer has a problem with his

television. If a TV program does have the color, the problem may be BD-

HTS, the cables being used, or the TV itself.

YES

Does color appear when the

BD is connected to another TV?

YES

Has the customer tried another

set of cables?

Connect the BD to another TV and play a disc. Good color during disc

Have the customer try another set of cables. A bad cable can also cause

video problems. Test the cable with another device to the TV to also

determine if the TV is bad. If the BD is the problem, please see service

chart for service information.

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DIGITAL DISPLAY & MEDIA TRAINING MASTER

3-2. Poor Color

The color is poor. Examples would be washed out colors, colors bleeding into one another, or a solid tint to a screen.

What cables is the customer

using to connect the BD?

YES

Is the TV set to the correct input?

YES

Is color fine when watching

multiple discs?

YES

Is color fine when watching a TV

program?

Determine what cables the customer is using to connect the BD to the

TV and if connected properly. Refer to OM for connections. Tighten any

loose cables. Make sure the customer is not connecting a BD to VCR.

Copy protection can distort the picture on older VCR models.

Make sure the TV is on the correct input according to the connections in

use. Video when using composite, or component. DVI when using DVI,

and HDMI when using HDMI.

One disc displaying the issue is a problem with the disc. Make sure the

discs the customer is using are compatible with the BD by checking

“playable discs” in the owners manual. Multiple discs displaying the

problem indicates a problem with BD-HTS.

If the cable or satellite programming is connected through another input

and the customer does not get color, the customer has a problem with his

television. If a TV program does have the color, the problem may be BD-

HTS, the cables being used, or the TV itself.

YES

Is color fine when the BD is

connected to another TV?

YES

Has the customer tried another

set of cables?

Connect the BD to another TV and play a disc. Good color during disc

Have the customer try another set of cables. A bad cable can also cause

video problems. Test the cable with another device to the TV to also

determine if the TV is bad. If the BD is the problem, please see service

chart for service information.

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DIGITAL DISPLAY & MEDIA TRAINING MASTER

4. NOISE/AUDIO PROBLEMS

4-1. No Audio

The customer is not able to get audio.

What cables is the customer

using to connect the BD?

YES

Is the customer able to see

video?

YES

Does issue occur on more than

one disc?

YES

Problem occur when watching TV

program?

Determine what cables the customer is using to connect the BD to the TV

and if connected properly. Refer to OM for connections. Tighten any loose

cables. Make sure the customer has audio cables connected if using an

HDMI to DVI adapter or video-only cables (DVI, component, etc).

Make sure the customer has not routed video and audio to separate

inputs.

Problem occurring on one disc indicates a problem with the disc.

Problem occurring on multiple discs could indicate a lens cleaner is

needed. The customer can purchase a lens cleaner at any electronics

retailer.

No audio from a TV program on a different channel or input means there

is a problem with the television. If a TV program does have the audio,

the problem may be BD-HTS, the cables being used, or the TV itself.

YES

Does the problem occur when

BD is connected to another TV?

YES

Has the customer tried another

set of cables?

Audio is fine when the BD is connected to another TV indicates the

problem is with the television. Refer to the owners manual for assistance

with connecting BD to another TV.

Have the customer try another set of cables. A bad cable can also cause

audio problems. Test the cable with another device to the TV to also

determine if the TV is bad. If BD is problem, please see service chart for

service information.

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DIGITAL DISPLAY & MEDIA TRAINING MASTER

4-2. Distorted Audio

The audio sounds muffled, scratchy, or the audio skips.

What cables is the customer

using to connect the DVD?

YES

Is the customer able to see

video?

YES

Does issue occur on more than

one disc?

YES

Problem occur when watching TV

program?

Determine what cables the customer is using to connect the BD to the TV

and if connected properly. Refer to OM for connections. Tighten any loose

cables. Make sure the customer has audio cables connected if using an

HDMI to DVI adapter or video-only cables (DVI, component, etc).

Make sure the customer has not routed video and audio to separate

inputs.

Problem occurring on one disc indicates a problem with the disc.

Problem occurring on multiple discs could indicate a lens cleaner is

needed. The customer can purchase a lens cleaner at any electronics

retailer.

Distorted audio from a TV program on a different channel or input means

there is a problem with the television. If a TV program does have the

audio, the problem may be BD-HTS, the cables being used, or the TV

itself.

YES

Does the problem occur when DVD is connected to another TV?

YES

Has the customer tried another

set of cables?

Audio is fine when the BD is connected to another TV indicates the

problem is with the television. Refer to the owners manual for assistance

with connecting BD to another TV.

Have the customer try another set of cables. A bad cable can also cause

audio problems. Test the cable with another device to the TV to also

determine if the TV is bad. If BD is problem, please see service chart for

service information.

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DIGITAL DISPLAY & MEDIA TRAINING MASTER

4-3. Humming/Clicking Noise

The unit is making a humming noise or a clicking noise.

BDs make a slight hum when playing discs. A clicking noise or a noise

interfering with audio may indicate a problem. Try multiple discs.

Multiple discs with the same issue means the BD may need service or be

professionally cleaned. Check BD service for service instructions.

Does the noise only happen

when a disc is playing?

YES

Check to see if a disc is inserted into the BD and eject the disc.

A humming or clicking noise when the disc is not inserted may be a

cooling fan. Check OM to see if cooling fan is present. If not, unit will need

service. See BD service for service instructions.

Does the noise happen when the

BD is turned on?

4-4. Audio/Video Out of Synch

The audio and video do not match up. People look to be talking, but their voices are delayed by a few seconds.

If the issue only shows up on one disc, then the problem is with that disc.

Have the customer try multiple tapes or discs. If the issue happens on

multiple discs and tapes, then ask the customer to try a lens or a head

cleaner.

Has the customer tried multiple

tapes and discs?

YES

How are the cables routed?

YES

Has the customer connected to

another TV?

Make sure cables are routed properly. Make sure audio and video cables

are routed to the same source (if possible). Routed audio and video to

separate products can cause a bit of a delay between the devices as not

all devices will process audio and video signals at the same speed.

Ask the customer to connect the product to another TV. If the issue

persists, try another set of cables. If the issue still persists, then the issue

is with the unit. The unit will need service.

Arrange service following proper procedure.

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DIGITAL DISPLAY & MEDIA TRAINING MASTER

5. MISCELLANEOUS

5-1. No Power

The unit will not turn on.

Is the unit plugged in?

YES

Does the unit turn on when the

power button is pressed on the

unit?

YES

Is the unit plugged into a surge

protector?

YES

Does the unit work when plugged

into another outlet?

YES

Make sure the unit is plugged into a surge protector or the wall.

See if the unit will turn on when the power button the unit is pressed.

If the unit turns on, then troubleshoot the remote control using the

Remote Control Not Working call flow.

Make sure the surge protector is plugged into a wall outlet.

Also make sure the surge protector is turned on or does not need to be

reset due to a recent surge.

Test the unit in another outlet. If the unit works, then the problem is the

outlet where the unit was connected. If the issue is the BD, then set up

service for BD according to BD service guide.

Have there been any lightning

strikes or power outages?

If BD failed due to lightning strike or a power surge, this is not covered by

warranty. Follow guidelines for service for a BD out of warranty.

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DIGITAL DISPLAY & MEDIA TRAINING MASTER

5-2. Disc Error

The unit displays “disc error” when a disc is inserted into BD-HTS.

Is the disc inserted into BD-HTS

properly?

YES

What type of disc is the customer

using?

YES

Did the customer burn this disc in

a DVD recorder?

YES

Did the customer burn the disc in

a computer?

Make sure the disc has been inserted into BD-HTS properly.

BD-HTS can not read a disc inserted into the unit upside down.

Determine the type of disc the customer is not able to play.

If the customer is using a store-bought movie BD, then please skip the

next three questions. If it’s a recorded disc, move onto the next question.

Make sure the customer finalized the disc in the DVD recorder.

Make sure the type of disc the customer is using is compatible with BD-

HTS. If the customer initialized a DVD-RW in VR mode, make sure the

owners manual has the RW logo to show compatibility for the VR format.

Make sure the customer burned a compatible format (such as VCD,

SVCD, or DivX). Make sure the file meets the specifications required for

BD-HTS to play the disc. Check the owners manual for specifications.

Disc may still not be compatible. Refer customer to section of OM

regarding burned discs.

YES

Has the customer tried multiple

discs?

One disc with the problem is a problem with the disc. BD-HTSs can play

scratched or dirty BDs (DVDs) and not have any issues during playback.

Multiple discs with the issue can mean the lens on BD-HTS needs to

be cleaned. Recommend a lens cleaner. Service BD if lens cleaner was

used.

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DIGITAL DISPLAY & MEDIA TRAINING MASTER

5-3. Unit Locks Up

Unit does not respond to any commands.

Does the unit respond to the

buttons on the unit?

YES

Has the customer reset the unit?

5-4. Disc Stuck

A BD disc is stuck in the unit.aa

Does the open/close button on

the unit work?

YES

If the unit will turn on or off with the button on the unit, troubleshoot the

remote control. Please refer to Remote Control Not Working call flow.

If the unit does no respond to any buttons, then reset the unit by

unplugging it for 15 to 30 seconds. If the unit does not respond after the

reset, arrange for service on the BD.

Press the open/close button on the unit. If the disc ejects, troubleshoot the

remote using the Remote Control Not Working call flow.

Has the customer reset the unit?

Ask the customer to reset the unit by unplugging the unit from the

electrical outlet for 15 to 30 seconds. If the disc remains stuck in the unit

after the reset, the unit will need service.

2-19

DIGITAL DISPLAY & MEDIA TRAINING MASTER

5-5. Remote Control Not Working

Does the unit respond to

buttons on the front of the unit?

YES

Does the remote control any

component?

YES

Have the batteries been

changed?

YES

Is the remote working at all?

If the buttons on the front of the unit do not respond, determine if the

product has locked up or if the unit will not turn on. The problem is not

the remote control. Make sure the remote control is the remote that goes

with that particular model.

Determine which product the remote is not working. The customer may

need to press the appropriate mode button to make the remote operate

another component. The remote may even need to be programmed to the

other component, especially if the batteries were just changed.

Ask the customer to change batteries. Make sure the batteries are new

and fresh. The batteries do not need to come from a “spare” battery

drawer. Do not mix used and new batteries.

If the remote does not work anything, then walk the customer through a

remote drain. Remove the batteries from the remote control. Then press

and hold any button down for a minute. This will drain the power out of the

remote and reset it. Universal remotes will have to be reprogrammed.

YES

Does any remote work the unit?

YES

Does the customer want to

program their remote?

If another remote works the unit, then follow the procedure to FOC the

customer a new remote. If two remotes do not work the unit, the unit will

need service.

Please refer to the OM for instructions on how to program remote to TV.

Customer wants to program a remote other than Zenith or LG,

the customer will need to contact the manufacturer of the remote control.

Codes do not work, remote is not compatible.

2-20

DIGITAL DISPLAY & MEDIA TRAINING MASTER

5-6. Will Not Play Disc

The unit will not play a disc when a disc is inserted into BD-HTS.

Is the disc inserted into BD-HTS

properly?

YES

What type of disc is the customer

using?

YES

Did the customer burn this disc in

a DVD recorder?

YES

Did the customer burn the disc in

a computer?

Make sure the disc has been inserted into BD-HTS properly.

BD-HTS can not read a disc inserted into the unit upside down.

Determine the type of disc the customer is not able to play. If the customer is using a store-bought BD, then please skip the next three

questions. If it’s a recorded disc, move onto the next question.

Make sure the customer finalized the disc in the DVD recorder.

Make sure the type of disc the customer is using is compatible with the

BD-HTS. If the customer initialized a DVD-RW in VR mode, make sure the

owners manual has the RW logo to show compatibility for the VR

format.

Make sure the customer burned a compatible format (such as VCD,

SVCD, or DivX). Make sure the file meets the specifications required for

BD-HTS to play the disc. Check the owners manual for specifications.

Disc may still not be compatible. Refer customer to section of OM

regarding burned discs.

YES

Has the customer tried multiple

discs?

One disc with the problem is a problem with the disc. BD-HTSs can play

scratched or dirty BDs (DVDs) and not have any issues during playback.

Multiple discs with the issue can mean the lens on BD-HTS needs to

be cleaned. Recommend a lens cleaner. Service BD if lens cleaner was

used.

2-21

+ 73 hidden pages

LG BH4120SN Schematic

Specifications and Main Features

Frequently Asked Questions

User Manual