Lg Ubk80 User manual

SERVICE MANUAL

CAUTION

BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS”

IN THIS MANUAL.

MODEL: UBK80

P/NO : AFN78082559 DECEMBER, 2020

MODEL: UBK80

Only for training and service purposes.

Ultra HD Blu-ray Disc™ Player

“Any reproduction, duplication, distribution (including by way of email, facsimile or other

electronic means), publication, modification, copying or transmission of this Service Manual is

STRICTLY PROHIBITED unless you have obtained the prior written consent of the LG Electronics

entity from which you received this Service Manual. The material covered by this prohibition includes,

without limitation, any text, graphics or logos in this Service Manual.”

1-1

Only for training and service purposes.

CONTENTS

SECTION 1 ........ SUMMARY

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

SECTION 3 ........ ELECTRICAL

SECTION 4 ........ MECHANISM

SECTION 5 ........ F/E LOADER PART

1-2

Only for training and service purposes.

SECTION 1

SUMMARY

CONTENTS

PRODUCT SAFETY SERVICING GUIDELINES

FOR BLU-RAY DISC / DVD PLAYER PRODUCTS ......................................................................................... 1-3

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

• GENERAL SERVICING PRECAUTIONS

• INSULATION CHECKING PRODEDURE

• ELECTROSTATICALLY SENSITIVE (ES) DEVICES

FIRMWARE UPDATE GUIDE ........................................................................................................................... 1-5

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

1-3

Only for training and service purposes.

PRODUCT SAFETY SERVICING GUIDELINES

FOR BLU-RAY DISC / DVD PLAYER 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 des-

ignators 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, imple-

mentation 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 equilat-

eral triangle is intended to convey to the service personnel the follow-

ing 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 com-

ponent 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 electri-

cal 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, con-

duit, 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 consti-

tutes 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 plat-

form 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 exten-

sions, sprouting from a single outlet, can lead to disastrous consequences to

home and family.

1-4

Only for training and service purposes.

SERVICING PRECAUTIONS

CAUTION: Before servicing the

BLU-RAY DISC / DVD PLAYER

cov-

ered 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 pre-

cautions in this publications, always follow the safety precau-

tions.

Remember Safety First :

General Servicing Precautions

1. Always unplug the

BLU-RAY DISC / DVD PLAYER

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

BLU-RAY DISC / DVD

PLAYER

or any of its assemblies.

3. Unless specified otherwise in this service data, clean elec-

trical 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

BLU-RAY DISC / DVD PLAYER

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 appro-

priate 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 compo-

nent 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 surf ace 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.)

1-5

Only for training and service purposes.

FIRMWARE UPDATE GUIDE

1. UPDATE FIRMWARE

1) Insert USB or CD-ROM which has an update ﬁle.

2) OSD responds to the insertion event.

3) OSD is shown as below.

< Firmware Update OSD >

OSD contents:

|wkh{l

%SJWFS7FSTJPO )-(/

487FSTJPO #%$

"OFXVQEBUF XBTGPVOE

%PZPVXBOUUPVQEBUF

487FSTJPO #%$

0, $BODFM

1-6

Only for training and service purposes.

2. DURING UPDATING

1) Progressive bar is shown on the update time repeatedly.

2) Tray is opened.

3. AFTER UPDATE COMPLETE

1) Power off / on automatically after update complete.

2) Tray will be closed.

1-7

Only for training and service purposes.

SPECIFICATIONS

Power requirements Refer to main label.

Power consumption Refer to main label.

Networked standby : 0.5 W

(If all network ports are activated.)

Dimensions (W x H x D) Approx. 430 mm x 45.5 mm x 205 mm

Bus Power Supply (USB) 5 V 500 mA

•Design and specifications are subject to change without notice.

1-8

Only for training and service purposes.

2-1

Only for training and service purposes.

SECTION 2

CABINET & MAIN CHASSIS

CONTENTS

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

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

2. DECK MECHANISM SECTION ................................................................................................................ 2-4

3. PACKING ACCESSORY SECTION ......................................................................................................... 2-6

2-2

Only for training and service purposes.

CBA

MAIN

BOARD

SMPS

BOARD

LED

BOARD

283

A46

A47

A53

264

266

300

261

262

261

260

284

CABLE2

250

A44

A45

267

251

EXPLODED VIEWS

1. CABINET AND MAIN FRAME SECTION

NOTES) THE EXCLAMATION POINT WITHIN AN

EQUILATERAL TRIANGLE IS INTENDED

TO ALERT THE SERVICE PERSONNEL

TO THE PRESENCE OF IMPORTANT

SAFETY INFORMATION IN SERVICE

LITERATURE.

2-3

Only for training and service purposes.

•Cabinet and main frame parts list

S AL LOCA. NO. PART NO. DESCRIPTION SPECIFICATION REMARKS

ASSEMBLY PARTS

A44 Frame Assembly

A45 Case Assembly

A46 EBU63926011 BPR Total Assembly UP870_BPR -

A47 EBR84231701 PCB Assembly,Power UP970/870 SMPS&Front W/W -

A53 EBU64502101 BPR Total Assembly UP870 LED_BPR -

INDIVIDUAL PARTS

250 Case

251 MBG66246601 Button MOLD ABS BD Player UP970 MOLD -

260 Chassis

261 MDP63026803 Foot EXTRUSION SILICON BD Player UP

262 MCK67389501 Cover MOLD HIPS 60HR DVD BP325 / BP1

264 MEG65020901 Holder MOLD ABS BD Player UP970 MOLD

266 MCQ62096408 Damper CUTTING THERMOPLASTIC DVD BD57

267 ABA30039201 Bracket Assembly BD Player UBK80/90 Bracket Ass

283 MCV63873901 Door MOLD ABS BD Player UP970 MOLD

284 MHY63124701 Spring EXTRUSION SWC COIL RH735 Torsi

w300 Power Cord

CABLE

CABLE2 EAD62228008 Cable,FFC 6P100D-H2-0F01N-T-50-0-0-0-0-0

BD Player UBK80 Update HDMI TM

UBK80-LGEUS -

MBN65483901 MOLD ABS UBK80 MOLD CASE TOP

MBS63805919 PRESS SECC 0.6 UBK80-WW PRESS

EAD62501535 USA95N AT-H2P-1500/95-N-01-BK-

ADV76705609

ABQ76642101

2-4

Only for training and service purposes.

1026

1030

1016

1013 1015

1020

1011

1012

1035

A006

1043

A005

1439

1045

1018

1019

1028

1051

1439

1052

1050

1027

1029

1028

1060

1005 1001

1003 1004

A100

A101

A102

1439

1002

1439

1049 1437

1025

1024

1437

1053

2. DECK MECHANISM SECTION

2-5

Only for training and service purposes.

•Deck mechanism parts list

S AL LOCA. NO. PART NO. DESCRIPTION SPECIFICATION REMARKS

COVER ASSEMBLY

A100 ACQ90288201 Cover Assembly DECK/MECHA UP870 Cover Top Ass

1001 ACA73589401 Clamp Assembly DECK/MECHA UP970 UHD BD Player

1002 MCK69432401 Cover MOLD HIPS 60HR BD Player up970

1003 MBU63585501 Clamp MOLD POM BD Player up970 MOLD

1004 RAB35231201 Magnet,NdFeB ND(N33EH) 11100TO11900G 1.5T

1005 MGJ63182201 Plate PRESS SECC 0.5 SBM-01AA PRESS

1439 1SZZH-1007B Screw,Customized + D2.0 6MM SWRCH16A/ZNBK 4MM 1

BRACKET ASSEMBLY

A101 ABA76688301 Bracket Assembly DECK/MECHA UP870 Bracket TRAVS

1024 MCQ68986002 Damper CUTTING BUTHYL 25 BD Player up

1025 MCQ68966602 Damper CUTTING BUTHYL HR 25 BD Player

1049 EAZ63001101 Pick Up Assembly KEM481AAA KEM481AAA Sony HD BD

1053 MAZ65527701 Bracket PRESS SECC 2.3 BD Player up970

1437 FAB30840502 Screw,Customized PWH + 2M 8M SWRCH FZY

1439 1SZZH-1007B Screw,Customized + D2.0 6MM SWRCH16A/ZNBK 4MM 1

BASE ASSEMBLY

A102 AAN76508701 Base Assembly UP870 Base Main Assy

A005 EBR83858301 PCB Assembly,Deck UP970 Loading PCB Assy UHD BD

A006 EAU62123301 Motor Assembly,DC Recorder BM10 loading - HZ -

1011 MAM64504201 Base MOLD ABS HF380 up970 MOLD Base

1012 MEA62870901 Guide MOLD HIPS 60HR DECK/MECHA BM14

1013 MDT62367501 Gear MOLD POM DECK/MECHA BM14 MOLD

1015 4400R-0010A Belt DVD DP-9 OTHER LOADING

1016 MDT62367401 Gear MOLD POM DECK/MECHA BM14 MOLD

1018 EAU62065801 Motor,DC JQ24-35H390L_Wire 80mm_Loading

OR 1018 4680R-E008A Motor,DC RF-300EA-1D390(80MM) 2V 90mA 2

1019 4560R-1016A Pulley MOLD POM DVD MOTOR MOLD DR-02

OR 1019 4560H-1005A Pulley MOLD POM F20.03 motor ALL 1

1020 MAM64464401 Base MOLD ABS HF-380 up970 MOLD -

1026 MJS62671802 Tray MOLD ABS XR-401 DECK/MECHA BM1

1027 MHK65808501 Sheet CUTTING EVA EPE 25 5 0.5 Sheet

1028 MHK65808502 Sheet CUTTING EVA EPE 16.5 10 1 Shee

1029 MHK65808506 Sheet CUTTING EVA EPE 8.5 8.5 1 Shee

1030 EAD61048203 Cable,FFC AT05045180C04 180MM 0.50MM 45P

1035 EAD36091013 Cable,FFC AT10009200D01 200MM 1.00MM 9P

1043 6600KW3004G Switch,Micro JDS 2160 2C2P 5VDC 0.01A VERTI

OR 1043 6600HXF102A Switch,Detector MPU20160MLB0 2C1P 5VDC 0.7MA V

1045 EAD62039801 Cable,FFC AT10005160G03 160MM 1.00MM 5P

1050 MCK69430801 Cover PRESS SECC 06 DECK/MECHA up970

1051 MHK65808503 Sheet CUTTING EVA EPE 87 31 0.5 Shee

1052 MHY64884001 Spring CUTTING SUS304WPB COIL UP870 S

1060 MHK65808504 Sheet CUTTING EVA EPE 43.5 31 0.5 Sh

2-6

Only for training and service purposes.

900 Remote Control

3. PACKING ACCESSORY SECTION

2-7

Only for training and service purposes.

•Packing accessory parts list

S AL LOCA. NO. PART NO. DESCRIPTION SPECIFICATION REMARKS

900 Remote Controller AssemblyAKB75135401 U3-1 BP350 FCC

2-8

Only for training and service purposes.

3-1

Only for training and service purposes.

SECTION 3

ELECTRICAL

CONTENTS

DIGITAL DISPLAY & MEDIA TRAINING MASTER ......................................................................................... 3-2

1. DISTORTED PICTURE........................................................................................................................... 3-2

2. NO PICTURE .......................................................................................................................................... 3-7

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

4. NOISE/AUDIO PROBLEMS.................................................................................................................. 3-14

5. MISCELLANEOUS................................................................................................................................ 3-17

6. BLU-RAY PLAYER ............................................................................................................................... 3-26

ONE POINT REPAIR GUIDE .......................................................................................................................... 3-27

1. NO POWER PROBLEM ....................................................................................................................... 3-27

2. NO BOOTING WHEN YOU TURN THE UNIT ON, NO GREEN LED ON FRONT PANEL ................ 3-30

3. NO HDMI VIDEO / AUDIO OUTPUT.................................................................................................... 3-38

4. NO SOUND........................................................................................................................................... 3-39

5. NETWORK CONNECTION ERROR..................................................................................................... 3-40

6. NO DETECTION ................................................................................................................................... 3-41

ELECTRICAL TROUBLESHOOTING GUIDE................................................................................................. 3-42

1. POWER SUPPLY ON SMPS BOARD.................................................................................................. 3-42

2. POWER SUPPLY ON MAIN BOARD................................................................................................... 3-44

WAVEFORMS OF MAJOR CHECK POINT.................................................................................................... 3-50

1. SYSTEM PART - 1 ............................................................................................................................... 3-50

2. SYSTEM PART - 2 (SYSTEM MEMORY)............................................................................................ 3-51

3. AUDIO PART (S/PDIF) ......................................................................................................................... 3-52

4. HDMI PART .......................................................................................................................................... 3-53

WIRING DIAGRAM.......................................................................................................................................... 3-54

BLOCK DIAGRAM .......................................................................................................................................... 3-55

CIRCUIT VOLTAGE CHART........................................................................................................................... 3-57

PRINTED CIRCUIT BOARD DIAGRAMS ....................................................................................................... 3-59

1. SMPS P.C. BOARD .............................................................................................................................. 3-59

2. MAIN P.C. BOARD ............................................................................................................................... 3-61

3. LED P.C. BOARD ................................................................................................................................. 3-65

3-2

Only for training and service purposes.

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.

What cables is

the customer using to

connect the BD?

YES

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 DVD models.

Is the TV set

to the correct input?

YES

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.

Do ghosting appear

when watching multiple discs?

YES

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.

Do lines appear

when watching multiple discs?

YES

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.

Does ghosting appear

when the BD is connected to

another TV?

YES

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.

Has the customer tried

another set of cables?

NO 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.

3-3

Only for training and service purposes.

DIGITAL DISPLAY & MEDIA TRAINING MASTER

What cables is the customer

using to connect the BD?

YES

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.

Is the TV set to

the correct input?

YES

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.

Do ghosting appear when

watching multiple discs?

YES

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.

Do lines appear when

watching a TV program?

YES

Ghosting 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.

Does ghosting

appear when the BD is

connected to another TV?

YES

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.

Has the customer tried

another set of cables?

NO 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.

1-2. Ghost Picture

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

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