LG DP122 User manual

DVD-VIDEO PLAYER
SERVICE MANUAL
MODEL: DP122
CAUTION
BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS”
IN THIS MANUAL.
MODEL: DP122SERVICE MANUAL
Website http://biz.lgservice.com
Internal Use Only
P/NO : AFN75734177 NOVEMBER, 2012
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CONTENTS
SECTION 1 ........ SUMMARY
SECTION 2 ........ CABINET & MAIN CHASSIS
SECTION 3 ........ ELECTRICAL
SECTION 4 ........ MECHANISM (DP-15)
SECTION 5 ........ REPLACEMENT PARTS LIST
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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 DISC / USB DOWNLOAD............................................................................................. 1-5
SPECIFICATIONS............................................................................................................................................ 1-9
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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 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,
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 equi-
lateral 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 par-
ticles.
4. Check for physical evidence of damage or deterioration to parts and compo-
nents, 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 volt-
age 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 measure-
ments 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 instal-
lations.
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.
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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 circumstanc-
es 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 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
which instruments covered by this service manual might be
equipped.
5. Do not apply AC power to this DVD and / or any of its elec-
trical 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 resis-
tance between each blade of the attachment plug and acces-
sible 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 commer-
cially 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 elec-
tricity sufficient to damage an ES device.)
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METHOD 1. 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 confirm the
system information.
5) Remember or write the model name.
6) Change the program file name of new version (rename) to the model name.
Model name : LG_DV_LVC10F33208CMV
Ex> New ver. program file --> LG_DV_LVA10F73208CHE_V0.4.ROM
Rename : LG_DV_LVC310F732080MV.ROM --> LG_DV_LVC10F33208CMV
THE PROCESS OF DISC / USB DOWNLOAD
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7) Burn the changed file into disc.
8) Open tray, insert disc and close tray.
9) The below picture will appears on the screen.
10) Tray will open automatically. Take off the disc and press PLAY to upgrade.
11) After download process completed. DVD player will turn-off and turn on automatically.
12) Do it again the process 1, 2, 3, 4 to confirm the version.
4
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METHOD 2. Please follow the below process to download a program with USB.
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 confirm the
system information.
5) Remember or write the model name.
6) Change the program file name of new version (rename) to the model name.
Model name : LG_DV_LVC10F33208CMV
Ex> New ver. program file --> LG_DV_LVA10F73208CHE_V0.4.ROM
Rename : LG_DV_LVC310F732080MV.ROM --> LG_DV_LVC10F33208CMV
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7) Save or Copy the changed file into USB Flashdisk on root directory.
8) Make sure the isn’t anything inserted on the set and Plug in the USB Flashdisk.
As the return icon displays, press the Return button on remote control.
9) The below picture will appears on the screen.
10) Take off the USB and press PLAY to upgrade.
11) After download process completed. DVD player will turn-off and turn on automatically.
12) Do it again the process 1, 2, 3, 4 to confirm the version.
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SPECIFICATIONS
• GENERAL
Power requirements AC 200V ~ 240 V, 50/60 Hz
Power consumption 11 W
Dimensions (Approx.) 270 x 35 x 195mm (W x H x D) without foot
Net Weight (Approx.) 1.4 kg
Operating temperature: 5°C to 35°C
Operating humidity 5% to 90%
Laser Semiconductor laser
Signal system PAL / NTSC
• INPUTS
USB IN 4 pin (USB 2.0 / 1.1 standard)
• OUTPUTS
Video Output 1.0V(p-p), 75Ω, sync negative,
RCA jack x 1
Audio Output 2.0 Vrms (1kHz, 0dB), 600 Ω,
RCA jack (L, R) x 1
Digital Output (Coaxial) 0.5 V(p-p), 75 Ω,
RCA jack x 1
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MEMO
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SECTION 2
CABINET & MAIN CHASSIS
CONTENTS
EXPLODED VIEWS ......................................................................................................................................... 2-2
1. CABINET AND MAIN FRAME SECTION ................................................................................................. 2-2
2. DECK MECHANISM SECTION (DP-15) .................................................................................................. 2-3
3. PACKING ACCESSORY SECTION ......................................................................................................... 2-4
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A43
283
250
462
261
260
A44
284
A
B
261
465
MAIN BOARD
A46
SMPS BOARD
462
462
468
A47
A
B
468
278
300
EXPLODED VIEWS
1. CABINET AND MAIN FRAME SECTION
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2. DECK MECHANISM SECTION (DP-15)
442
442
010
442
012
012
012
019
026
440
015
017
013
439
018
A02
A01
001
002
003
014
015A
015B 016
020
435
A03
037
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3. PACKING ACCESSORY SECTION
801 Owner’s manual
808 Batteries
900 Remote control
813 Plug Ass’y 3 way
804 Packing Sheet
803 Packing
803 Packing
802 Box Carton
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SECTION 3
ELECTRICAL
CONTENTS
ONE POINT REPAIR GUIDE ............................................................................................................................ 3-2
1. NO BOOTING ......................................................................................................................................... 3-2
2. NO VIDEO OUTPUT............................................................................................................................... 3-7
3. NO AUDIO OUTPUT .............................................................................................................................. 3-8
ELECTRICAL TROUBLESHOOTING GUIDE................................................................................................... 3-9
1. SMPS TROUBLESHOOTING FLOW ..................................................................................................... 3-9
2. POWER CHECK FLOW ....................................................................................................................... 3-11
3. SYSTEM OPERATION FLOW.............................................................................................................. 3-12
4. SYSTEM TEST FLOW.......................................................................................................................... 3-13
DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING ....................................................... 3-19
1. SYSTEM 27MHZ CLOCK, RESET, FLASH R/W SIGNAL................................................................... 3-19
2. SDRAM CLOCK.................................................................................................................................... 3-21
3. TRAY OPEN/CLOSE SIGNAL.............................................................................................................. 3-21
4. SLED CONTROL RELATED SIGNAL (NO DISC CONDITION) .......................................................... 3-22
5. LENS CONTROL RELATED SIGNAL (NO DISC CONDITION) .......................................................... 3-22
6. LASER POWER CONTROL RELATED SIGNAL (NO DISC CONDITION) ......................................... 3-23
7. SPINDLE CONTROL WAVEFORM (NO DISC CONDITION) .............................................................. 3-23
8. FOCUS ON WAVEFORM..................................................................................................................... 3-24
9. TRACKING CONTROL RELATED SIGNAL (SYSTEM CHECKING)................................................... 3-25
10. MT1389V AUDIO COAXIAL OUTPUT (SPDIF).................................................................................... 3-26
11. MT1389V VIDEO OUTPUT WAVEFORM ............................................................................................ 3-26
12. AUDIO OUTPUT FROM MT1389V....................................................................................................... 3-27
WIRING DIAGRAM.......................................................................................................................................... 3-28
BLOCK DIAGRAMS ........................................................................................................................................ 3-29
1. OVERALL BLOCK DIAGRAM .............................................................................................................. 3-29
2. SMPS & KEY BLOCK DIAGRAM ......................................................................................................... 3-30
3. POWER BLOCK DIAGRAM ................................................................................................................. 3-31
4. SYSTEM BLOCK DIAGRAM ................................................................................................................ 3-32
5. SERVO BLOCK DIAGRAM .................................................................................................................. 3-33
6. A/V BLOCK DIAGRAM ......................................................................................................................... 3-34
CIRCUIT DIAGRAMS ...................................................................................................................................... 3-35
1. SMPS & KEY / LED CIRCUIT DIAGRAM ............................................................................................ 3-35
2. MAIN-MPEG CIRCUIT DIAGRAM........................................................................................................ 3-37
3. MAIN-SERVO CIRCUIT DIAGRAM...................................................................................................... 3-39
4. MAIN-AV CIRCUIT DIAGRAM.............................................................................................................. 3-41
CIRCUIT VOLTAGE CHART........................................................................................................................... 3-43
1. ICs......................................................................................................................................................... 3-43
2. TRs........................................................................................................................................................ 3-45
3. CAPACITORS....................................................................................................................................... 3-45
4. CONNECTORS..................................................................................................................................... 3-46
PRINTED CIRCUIT BOARD DIAGRAMS ....................................................................................................... 3-47
1. MAIN P.C.BOARD ................................................................................................................................ 3-47
2. SMPS & KEY / LED P.C.BOARD ......................................................................................................... 3-49
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1. NO BOOTING
When you plug power cord and turn the unit on, LED won’t turn on, the unit won’t read disc normally.
1-1. Please check every output voltage.
1) Please check if output voltage 3.3 VA on MAIN board IC605 is normal.
If output voltage 3.3 VA is not normal, please check the working status of SMPS board.
2) Please check if output voltage 5 V on MAIN board of Q601 emitter is normal.
If output voltage 5 V of Q601 is not normal, please check 5 VA of CN602 pin3 the working status.
If output voltage 5 V is not normal, please check the working status of SMPS board.
3) Please check if output voltage 1.8 VA from MAIN board Q208 collector pin is normal.
If output voltage 1.8 V is not normal, please check the working status of MAIN board Q208.
ONE POINT REPAIR GUIDE
< MAIN board top view >
Q208
(1.8 V regulator)
Q601
(5 V regulator)
IC605
(3.3 V regulator)
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< MAIN board top view >
NO BOOTING
When you plug power cord and turn the unit on, LED won’t turn on, the unit won’t read disc normally.
1-2. Please check MAIN board IC601 signal and its peripheral circuit.
1) Please check if output voltage 3.3 V from IC601 pin8, pin19, pin50, pin68, pin84 is normal.
If output voltage 3.3 V is not normal, please check 3.3 VA power line of the MAIN board.
2) Please check if output voltage 1.8 V from IC601 pin54, pin90, pin123 is normal.
If output voltage 1.8 V is not normal, please check 1.8 V power line of the MAIN board.
3) Please check oscillating frequency 27 MHz of MAIN board X601 crystal is normal.
If oscillating frequency 27 MHz is not normal, please check if X601 and its peripheral circuit is in failure.
4) Please check if frequency 135 MHz of IC601 pin66 R_CLK is normal.
If frequency 135 MHz is not normal, please check if IC601 is in failure.
ONE POINT REPAIR GUIDE
X601
(X-TAL)
IC601
(MPEG)
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< MAIN board top view >
NO BOOTING
When you plug power cord and turn the unit on, LED won’t turn on, the unit won’t read disc normally.
1-3. Please check MAIN board IC IC603 signal and its peripheral circuit.
1) Please check if output voltage 3.3 V from IC603 pin1, 3, 9, 14, 27, 43, 49 is normal.
If output voltage 3.3 V is not normal, please check 3.3 V power circuit of MAIN board.
2) Please check every signal connected between IC603 and IC601 pin45 ~ 86, especially including
DATA and ADDRESS signal.
If DATA and ADDRESS signal is not normally output, please check if IC603 is in failure.
ONE POINT REPAIR GUIDE
IC601
(MPEG)
IC603
(SDRAM)
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< MAIN board top view >
NO BOOTING
When you plug power cord and turn the unit on, LED won’t turn on, the unit won’t read disc normally.
1-4. Please check MAIN board IC IC602 signal and its peripheral circuit.
1) Please check if output voltage 3.3 V from IC602 pin8 is normal.
If output voltage 3.3 V is not normal, please check 3.3 V power circuit of MAIN board.
2) Please check every signal connected between IC602 and IC601, especially including CE, DATA and
CLK signal.
If CE, DATA and CLK signal is not normally output, please check if IC602 is in failure.
ONE POINT REPAIR GUIDE
IC602
(FLASH)
IC601
(MPEG)
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