LG DP547 Service Manual

SERVICE MANUAL

CAUTION

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

Internal Use Only

Website http://biz.lgservice.com

JULY, 2015

MODEL: DP547

DVD Player

P/NO : AFN76412152

CONTENTS

SECTION 1 ........ SUMMARY

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

SECTION 3 ........ ELECTRICAL

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

1-1

SECTION 1

SUMMARY

CONTENTS

PRODUCT SAFETY SERVICING GUIDELINES FOR DVD PRODUCTS .................................................. 1-3

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

• GENERAL SERVICING PRECAUTIONS

• INSULATION CHECKING PRODEDURE

• ELECTROSTATICALLY SENSITIVE (ES) DEVICES

THE PROCESS OF USB DOWNLOAD ......................................................................................................... 1-5

SPECIFICATIONS ............................................................................................................................................ 1-8

1-2

PRODUCT SAFETY SERVICING GUIDELINES FOR DVD 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 are 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.

1-3

SERVICING PRECAUTIONS

CAUTION: Before servicing the DVD 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 publication, always follow the safety precautions. Remember Safety First :

General Servicing Precautions

1. Always unplug the DVD 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 polarity

installation of electrolytic capacitors may result in an explosion hazard.

2. Do not spray chemicals on or near this DVD 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 which instruments covered by this service manual might be equipped.

5. Do not apply AC power to this DVD and / or any of its electrical assemblies unless all solid state 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

circuit, 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

THE PROCESS OF USB DOWNLOAD

Please follow the below process to download a program with disc

1. Turn on the DVD-player. Note: Be sure that there is no disc in DVD-player.

2. Press “SETUP” button on Remote control.

3. Choose a “DISPLAY” menu by using the cursor button and then choose a “TV Aspect” menu. And choose “16:9” menu.

4. Press the 1 --> 3 --> 9 --> 7 --> 1 --> 3 --> 9(Numerical button) --> Enter key on remote control to conﬁ rm the system information.

5. Remember or write the model.

6. Change the program ﬁ le name of new version to the model. Example: New ver. program ﬁ le: LG_DV_LVB00B70000EHS_V1.9.ROT Model: LG_DV_LVB00B70008EHS.ROT Change New ver. program ﬁ le like this  LG_DV_LVB00B70008EHS.ROT If you don’t change the ﬁ le name like that,disc download isn’t be worked.

7. Copy the changed ﬁ le to a USB memory stick or burn it to CD-R/RW.

1-5

8. Insert the copied USB memory stick or Disc to DVD-player.

9. Press the RETURN button on the DVD Player. (USB only)

10. If the below picture appears on the screen. Press “PLAY” button on Remote controller. While this menu appears, please don’t eject disc or take out USB.

11. After the below picture appears on the screen. New DVD program will download from USB Memory stick or Disc automatically. Do not eject or take out the USB memory stick.

1-6

12. After USB download is completed, DVD-player displays below picture automatically.

13. Do power off of DVD-Player.

14. Remove the Disc or USB memory stick.

15. Turn on the DVD-player. Select the initial Language and Press “Enter” button. Then, Select “Enter” and Press “Enter” button.

16. Do it again the process 1, 2, 3, 4 to conﬁ rm the version.

17. Do power off of DVD-Player again.

1-7

SPECIFICATIONS

Power requirements AC 110 - 240 V, 50 / 60 Hz Power consumption 9 W Dimensions (W x H x D) (360 x 39.5 x 200) mm Net Weight (Approx.) 1.14 kg Operating temperature 0 °C - 40 °C Operating humidity 5 % - 90 %

Laser Semiconductor laser Signal system PAL / NTSC Bus Power Supply (USB) DC 5 V 200 mA

VIDEO OUT 1.0 V (p-p), 75 Ω, sync negative, RCA jack x 1 COMPONENT VIDEO OUT (Y) 1.0 V (p-p), 75 Ω, sync negative, RCA jack x 1, (Pb)/(Pr) 0.7 V (p-p), 75 Ω, RCA jack x 2 ANALOG AUDIO OUT 2.0 Vrms (1 kHz, 0 dB), 600 Ω, RCA jack (L, R) x 1 DIGITAL AUDIO OUT (COAXIAL) 0.5 V (p-p), 75 Ω, RCA jack x 1

Note : Design and specifications are subject to change without prior notice.

1-8

SECTION 2

CABINET & MAIN CHASSIS

CONTENTS

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

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

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

2-1

EXPLODED VIEWS

1. CABINET AND MAIN FRAME SECTION

A26

CABLE1

283

NOTES) THE EXCLAMATION POINT WITHIN AN

EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE SERVICE PERSONNEL

455250

TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE LITERATURE.

A43

CABLE2

A47

KARAOKE & MIC BOARD

SMPS & FRONT BOARD

455

A46

MAIN BOARD

455

300

455

261

260

2. PACKING ACCESSORY SECTION

801 Owner’s manual

813 RCA Video/Audio cable

802A Pad (Front) 802B Pad (Rear)

802 Box

900 Remote control

808 Battery

804 Bag

MEMO

2-4

SECTION 3

ELECTRICAL

CONTENTS

ONE POINT REPAIR GUIDE ...............................................................................................3-2

1. NO BOOTING WHEN YOU TURN THE UNIT ON ................................................................................. 3-2

2. NO VIDEO OUTPUT WHEN YOU TURN THE UNIT ON ...................................................................... 3-7

3. NO AUDIO OUTPUT WHEN YOU TURN THE UNIT ON ...................................................................... 3-8

ELECTRICAL TROUBLESHOOTING GUIDE ......................................................................3-9

1. SMPS TROUBLESHOOTING FLOW ..................................................................................................... 3-9

2. POWER CHECK FLOW ....................................................................................................................... 3-10

3. SYSTEM OPERATION FLOW .............................................................................................................. 3-11

4. SYSTEM TEST FLOW .......................................................................................................................... 3-12

DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING ..........................3-18

1. SYSTEM 27 MHz CLOCK, RESET, FLASH R/W SIGNAL .................................................................. 3-18

2. SLED CONTROL RELATED SIGNAL (NO DISC CONDITION) .......................................................... 3-20

3. LENS CONTROL RELATED SIGNAL (NO DISC CONDITION) .......................................................... 3-20

4. LASER POWER CONTROL RELATED SIGNAL ................................................................................. 3-21

5. SPINDLE CONTROL WAVEFORM ...................................................................................................... 3-22

6. FOCUS ON WAVEFORM ..................................................................................................................... 3-22

7. TRACKING CONTROL RELATED SIGNAL (SYSTEM CHECKING) ................................................... 3-23

8. SPHE8202RQ-D AUDIO COAXIAL OUTPUT (SPDIF) ........................................................................ 3-24

9. SPHE8202RQ-D VIDEO OUTPUT WAVEFORM ................................................................................. 3-24

10. AUDIO OUTPUT FROM SPHE8202RQ-D/128 .................................................................................... 3-25

WIRING DIAGRAM .............................................................................................................3-26

CIRCUIT DIAGRAMS .........................................................................................................3-27

1. SMPS & FRONT - SMPS CIRCUIT DIAGRAM .................................................................................... 3-27

2. SMPS & FRONT - FRONT CONTROL CIRCUIT DIAGRAM ............................................................... 3-29

3. SMPS & FRONT - MIC CIRCUIT DIAGRAM (OPTIONAL PART) ....................................................... 3-31

4. MAIN - POWER SUPPLY/ OPU CIRCUIT DIAGRAM.......................................................................... 3-33

5. MAIN - SPHE8202RQ-D/ FLASH/ SDRAM CIRCUIT DIAGRAM ........................................................ 3-35

6. MAIN - AUDIO AMPLIFIER/ AUDIO OUTPUT/ MUTE/ VIDEO BUFFER/

VIDEO OUTPUT CIRCUIT DIAGRAM ..................................................................................... 3-37

CIRCUIT VOLTAGE CHART ..............................................................................................3-39

1. MPEG & SDRAM .................................................................................................................................. 3-39

2. IC ........................................................................................................................................................... 3-40

3. TR ......................................................................................................................................................... 3-41

4. CAPACITOR ......................................................................................................................................... 3-41

5. CONNECTOR ....................................................................................................................................... 3-42

PRINTED CIRCUIT BOARD DIAGRAMS ..........................................................................3-43

1. SMPS & FRONT P.C.BOARD .............................................................................................................. 3-43

2. MAIN P.C.BOARD ................................................................................................................................ 3-47

3-1

ONE POINT REPAIR GUIDE

1. NO BOOTING WHEN YOU TURN THE UNIT ON

When you plug power cord and turn the unit on, LED light won’t turn red, the unit won’t

read disc normally.

1-1. Please check every output voltage.

1-1-1. Please check if output voltage 3.3 V from main board Q4 C polarity is normal.

 If output voltage 3.3 V is not normal, please check the working status of SMPS board.

1-1-2. Please check if output voltage 5 V from main board XP9 pin11 is normal.  If output voltage 5 V is not normal, please check the working status of SMPS board.

1-1-3. Please check if output voltage 1.2 V from main board Q5 C polarity is normal.  If output voltage 1.2 V is not normal, please check the working status of main board Q5.

Q5 Q4

XP9

< Main board top view >

3-2

ONE POINT REPAIR GUIDE

When you plug power cord and turn the unit on, LED light won’t turn red, the unit won’t

read disc normally

1-2. Please check main board IC U1 signal and its peripheral circuit.

1-2-1. Please check if output voltage 3.3 V from U1 pin4, pin32, pin78, pin83 is normal.

 If output voltage 3.3 V is not normal, please check 3.3 V power circuit of main board.

1-2-2. Please check if output voltage 1.2 V from U1 pin10, pin77, pin86 is normal.  If output voltage 1.2 V is not normal, please check 1.2 V power circuit of main board.

1-2-3. Please check if oscillating frequency 27 MHz of main board Y2 crystal is normal.  If oscillating frequency 27 MHz is not normal, please check if Y2 and its peripheral circuit is in failure.

1-2-4. Please check if frequency 135 MHz of U1 pin31 RAM_CLK is normal.

 If oscillating frequency 135 MHz is not normal, please check if U1 is in failure.

Y2 U1

< Main board top view >

3-3

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