LG BP340 User manual

BLU-RAY DISC / DVD PLAYER
SERVICE MANUAL
MODEL: BP340
CAUTION
BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS”
IN THIS MANUAL.
MODEL: BP340SERVICE MANUAL
P/NO : AFN76114583 MAY, 2014
Website http://biz.lgservice.com
Internal Use Only

1-1
CONTENTS
SECTION 1 ........ SUMMARY
SECTION 2 ........ CABINET & MAIN CHASSIS
SECTION 3 ........ ELECTRICAL
SECTION 4 ........ REPLACEMENT PARTS LIST

1-2
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
HIDDEN KEY MODE........................................................................................................................................ 1-5
UPDATE GUIDE............................................................................................................................................... 1-6
SPECIFICATIONS............................................................................................................................................ 1-7

1-3
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
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
HIDDEN MODE AVAILABLE STATUS ENTRANCE KEY EXIT KEY DISPLAY RESULT
EDIT EEPROM DATA (NO DISC||OPEN)&&
(Home Menu OFF) PAUSE+1+4+7+2 PAUSE Option Values
OPTION Data editable
It shall be disable on MP
version.
DISPLAY SYSTEM
INFORMATION
(NO DISC||OPEN)&&
(Highlight on 16:9 Full)
1+3+9+7+1+3+9+
ENTER or MP2 Pause || MP2 SYSTEM
INFORMATION
FACTORY RESET
(All of data have to be
Initialized as Factory Mode
except SPDATA)
DISPLAY SYSTEM
INFORMATION
for Devlelop
(NO DISC or Tray
OPEN State) and Setup-
DISPLAY-TV Aspect
Ratio-16:9 Full
4+5+6+2+5+8+0+
ENTER PAUSE Debug Information -
CLEAR PASSWORD (NO DISC||STOP) &&
(SETUP LOCK MENU ON)
2+1+0+4+9+9 x PASSWORD CLR(VFD) LOCK PASSWORD Cleared.
Change Resolution ALWAYS AVAILABLE Push Stop key 5 sec x 480P or 576P on VFD Change the Resolution to
480P or 576P
Chage Video System
Open and Home Menu OFF .
(Video system option
is PAL only)
push pause key
for 5 sec xAUTO->PAL ->NTSC(VFD)
Video system is changed
as AUTO->PAL->NTSC
->AUTO…
BE/FE DEBUG MESSAGE ALWAYS AVAILABLE 1+2+3+6+9+Enter x
CPUSB, OK (VFD)
or
NOUSB
Write BE/FE Debug Message
BE DEBUG MESSAGE ALWAYS AVAILABLE 1+2+3+6+8+Enter x
CPUSB, OK (VFD)
or
NOUSB
Write BE Debug Message
FE DEBUG MESSAGE ALWAYS AVAILABLE 1+2+3+6+7+Enter x
CPUSB, OK (VFD)
or
NOUSB
Write FE Debug Message
HIDDEN KEY MODE

1-6
1. USB TO UPDATE APP
1) Put the APP in the root of USB, and named as
“LG_BD_9000M51.ROM”
2) Power on and get in the home menu, insert the
USB.
3) The screen show like the picture below, select
“OK”
4) When the screen be black, is mean update
successfully and power off automatically.
2. USB TO UPDATE SERVO
1) Put the servo in the root of USB, and named as
“H15SON.ROM”
2) Power on and get in the home menu, insert the
USB.
3) The screen show like the picture below, select
“OK”
4) When the screen be black, is mean update
successfully and power off automatically
UPDATE GUIDE

1-7
SPECIFICATIONS
• GENERAL
Power Requirement AC 110~240 V, 50/60 Hz
Power Consumption 12 W
Dimensions (W× D× H) 260 mm x 198.5mm x 37 mm
Net Weight (Approx.) 0.937 kg
Operating Temperature 0 °C ~ 40 °C
Operating Humidity -20 °C ~ 60 °C
Standard Condition 25 °C, 65 %
• TERMINALS
HDMI Output HDMI 1.4b
USB Port USB 2.0, DC 5 V, 500 mA
• NETWORK
Wi-Fi Module Built-in 802.11 b/g/n
Note : Design and specifications are subject to change prior notice.

1-8
MEMO

2-1
SECTION 2
CABINET & MAIN CHASSIS
CONTENTS
HOW TO REMOVE THE TOP CASE ............................................................................................................. 2-2
EXPLODED VIEWS ......................................................................................................................................... 2-4
1. CABINET AND MAIN FRAME SECTION ................................................................................................. 2-4
2. PACKING ACCESSORY SECTION ......................................................................................................... 2-5

2-2
It is a front view of the set.
Remove the two screws that retain the top case of the back panel.
HOW TO REMOVE THE TOP CASE
1. Front view of the product
2. Removing the top case/ back panel screws

2-3
2) Press the arrow position to separate the top case and hook, and remove the bottom case and top case.
3. Removing the top case
1) Lift 45 degrees back of the top case as shown in figure.

250
462
261
260
261
465
A
C
B
468
283
CABLE3 CABLE2
CABLE1
A26
463
MODULE
CABLE4
264
A51
D
A43
SMPS
BOARD
468
A47
A46
MAIN
BOARD
A
B
D
C
EXPLODED VIEWS
1. CABINET AND MAIN FRAME SECTION
300

803A Packing (Pad2 Back)
803 Packing (Pad Front)
804 Bag
802 Box
900 Remote Control
808 Battery
801 Instruction Ass’y
2. PACKING ACCESSORY SECTION

2-6
MEMO

3-1
SECTION 3
ELECTRICAL
CONTENTS
ONE POINT REPAIR GUIDE .......................................................................................................................... 3-2
1. NO BOOTING WHEN YOU TURN THE UNIT ON................................................................................. 3-2
ELECTRICAL TROUBLESHOOTING GUIDE............................................................................................... 3-5
1. SMPS TROUBLESHOOTING FLOW ..................................................................................................... 3-5
2. UNIT POWER CHECK FLOW ................................................................................................................ 3-6
3. UNIT CANNOT POWER ON .................................................................................................................. 3-6
4. REMOTE CONTROL DOES NOT WORK.............................................................................................. 3-7
5. KEYS DO NOT WORK ........................................................................................................................... 3-7
6. NO HDMI OUTPUT................................................................................................................................. 3-8
7. CANNOT READ DISC OR TRAY OPEN/CLOSE................................................................................... 3-8
8. CANNOT READ USB DEVICE CONTENT ............................................................................................ 3-9
9. CANNOT CONNECT TO WIRELESS NETWORK................................................................................. 3-9
WAVEFORMS ON SYSTEM TEST .............................................................................................................. 3-10
1. POWER ON SYSTEM RESET SEQUENCE........................................................................................ 3-10
2. SYSTEM 27 MHZ CLOCK WAVEFORM.............................................................................................. 3-10
BLOCK DIAGRAM......................................................................................................................................... 3-11
CIRCUIT DIAGRAMS .................................................................................................................................... 3-13
1. SMPS - POWER CIRCUIT DIAGRAM.................................................................................................. 3-13
2. SMPS - KEY/ LED/ USB PORT/ IR CIRCUIT DIAGRAM .................................................................... 3-15
3. MAIN - POWER SOURCE CIRCUIT DIAGRAM .................................................................................. 3-17
4. MAIN - DDR3 #1 CIRCUIT DIAGRAM ................................................................................................. 3-19
5. MAIN - DDR3 #2 CIRCUIT DIAGRAM ................................................................................................. 3-21
6. MAIN - HDMI CIRCUIT DIAGRAM ....................................................................................................... 3-23
7. MAIN - USB CIRCUIT DIAGRAM......................................................................................................... 3-25
8. MAIN - MICOM CIRCUIT DIAGRAM.................................................................................................... 3-27
9. MAIN - FRONT END CIRCUIT DIAGRAM ........................................................................................... 3-29
10. MAIN - MOTOR DRIVE CIRCUIT DIAGRAM....................................................................................... 3-31
CIRCUIT VOLTAGE CHART ........................................................................................................................ 3-33
1. ICs......................................................................................................................................................... 3-33
2. TRs & FETs .......................................................................................................................................... 3-36
3. DIODES & IR ........................................................................................................................................ 3-36
4. CAPACITORS....................................................................................................................................... 3-36
5. CONNECTORS..................................................................................................................................... 3-37
PRINTED CIRCUIT BOARD DIAGRAMS.................................................................................................... 3-39
1. MAIN P.C.BOARD ................................................................................................................................ 3-39
2. SMPS P.C. BOARD .............................................................................................................................. 3-41

3-2
1. NO BOOTING WHEN YOU TURN THE UNIT ON
When you plug power cord and turn the unit on, LED light won’t turn green, the unit won’t output
video and read disc normally.
1-1. Please check every output voltage.
1) Please check if output voltage 12 V from main board C92 is normal.
ÖIf output voltage 12 V is not normal, please check the working status of SMPS board.
2) Please check if output voltage 5 V from main board C34 is normal.
ÖIf output voltage 5 V is not normal, please check the working status of main board U5 and its peripheral
circuit.
3) Please check if output voltage 3.3V_STBY from main board C3 is normal.
ÖIf output voltage 3.3V_STBY is not normal, please check the working status of main board U4 and its
peripheral circuit.
4) Please check if output voltage 3.3 V from main board C21 is normal.
ÖIf output voltage 3.3 V is not normal, please check the working status of main board U4 and its peripheral
circuit.
5) Please check if output voltage 1.5 V from main board C25 is normal.
ÖIf output voltage 1.5 V is not normal, please check the working status of main board U4 and its peripheral
circuit.
6) Please check if output voltage 1.2 V from main board C20 is normal.
ÖIf output voltage 1.2 V is not normal, please check the working status of main board U4 and its peripheral
circuit.
ONE POINT REPAIR GUIDE
< Main board top view >
C23
C25
C34
C21
C3
C92

3-3
ONE POINT REPAIR GUIDE
NO BOOTING WHEN YOU TURN THE UNIT ON
When you plug power cord and turn the unit on, LED light won’t turn green, the unit won’t output
video and read disc normally.
1-2. Please check main board IC U1 signal and its peripheral circuit.
1) Please check if RESET_signal from main board C214 is normal.
ÖIf RESET_ signal waveform is not normal, please check if U1 and its peripheral circuit are failure.
2) Please check if x-tal 27 MHz from main board Y1 is normal.
ÖIf x-tal 27 MHz is not normal, please check if Y1 and its peripheral circuit are failure.
< Main board top view >
U1
C214
Y1

3-4
ONE POINT REPAIR GUIDE
NO BOOTING WHEN YOU TURN THE UNIT ON
When you plug power cord and turn the unit on, LED light won’t turn green, the unit won’t output
video and read disc normally.
1-3. Please check main board IC U2 & U3 signal and its peripheral circuit.
1) Please check if DDR_VREF 0.75 V from main board U2 & U3 is normal.
ÖIf DDR_VREF 0.75 V is not normal, please check if U2 & U3 and its peripheral circuit are failure.
1-4. Please check main board IC U11 signal and its peripheral circuit.
1) Please check if VCC_BD_LD 8.2 V from main board Q9 S polarity is normal.
ÖIf VCC_BD_LD 8.2 V is not normal, please check if U11 and its peripheral circuit are failure.
< Main board top view >
U11
U3
U2

3-5
ELECTRICAL TROUBLESHOOTING GUIDE
No +12 V output
Power line of SMPS PCB is short.
Whether the F501 is normal? Replace the F501.
YES
YES
NO
Whether the D501/ D502/
D503/ D504 are normal?
Whether the D505 is normal?
Whether the U501 is normal?
Whether the U502 is normal?
Replace the D501/ D502/ D503/ D504.
Replace the D505.
Replace the U501.
Replace the U502.
YES
YES
YES
YES
NO
NO
NO
NO
1. SMPS TROUBLESHOOTING FLOW