LG DVD2300 User manual

1-3
CAUTION : DO NOT ATTEMPT TO MODIFY THIS PRODUCT IN ANY WAY,
NEVER PERFORM CUSTOMIZED INSTALLATIONS WITHOUT MANUFAC-
TURER’S APPROVAL. UNAUTHORIZED MODIFICATIONS WILL NOT ONLY
VOID THE WARRANTY, BUT MAY LEADTO YOUR BEING LIABLE FORANY
RESULTING PROPERTY DAMAGE OR USER INJURY.
SERVICE WORK SHOULD BE PERFORMED ONLY AFTER YOU ARE
THOROUGHLY FAMILIAR WITH ALL OF THE FOLLOWING SAFETY
CHECKS AND SERVICING GUIDELINES. TO DO OTHERWISE,
INCREASES THE RISK OF POTENTIAL HAZARDS AND INJURY TO THE
USER.
WHILE SERVICING, USE AN ISOLATION TRANSFORMER FOR PROTEC-
TION FROM A.C. LINE SHOCK.
SAFETY CHECKS
AFTER THE ORIGINAL SERVICE PROBLEM HAS BEEN CORRCTED. A
CHECK SHOULD BE MADE OF THE FOLLOWING.
SUBJECT : FIRE & SHOCK HAZARD
1. BE SURE THAT ALL COMPONENTS ARE POSITIONED IN SUCH A WAY
AS TO AVOID POSSIBILITY OF ADJACENT COMPONENT SHORTS.
THIS IS ESPECIALLY IMPORTANT ON THOSE MODULES WHICH ARE
TRANSPORTED TO AND FROM THE REPAIR SHOP.
2. NEVER RELEASE A REPAIR UNLESS ALL PROTECTIVE DEVICES
SUCH AS INSULATORS, BARRIERS, COVERS, SHIELDS, STRAIN
RELIEFS, POWER SUPPLY CORDS, AND OTHER HARDWARE HAVE
BEEN REINSTALLED PER 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, DAMAGED
INSULATION (INCLUDING A.C. CORD). AND REPLACE IF NECESSARY
FOLLOW ORIGINAL LAYOUT, LEAD LENGTH AND DRESS.
5. NO LEAD OR COMPONENT SHOULD TOUCH A RECIVING TUBE OR
A RESISTOR RATED AT 1 WATT OR MORE. LEAD TENSION AROUND
PROTRUNING METAL SURFACES MUST BE AVOIDED.
6. ALL CRITICAL COMPONENTS SUCH AS FUSES, FLAMEPROOF
RESISTORS, CAPACITORS, ETC. MUST BE REPLACED WITH EXACT
FACTORY TYPES, DO NOT USE REPLACEMENT COMPONENTS
OTHER THAN THOSE SPECIFIED OR MAKE UNRECOMMENDED CIR-
CUIT MODIFICATIONS.
7. AFTER RE-ASSEMBLY OF THE SET ALWAYS PERFORM AN A.C.
LEAKAGE TEST ON ALL EXPOSED METALLIC PARTS OF THE CABI-
NET, (THE CHANNEL SELECTOR KNOB, ANTENNA TERMINALS. HAN-
DLE AND SCREWS) TO BE SURE THE SET IS SAFE TO OPERATE
WITHOUT DANGER OF ELECTRICAL SHOCK. DO NOT USE A LINE
ISOLATION TRANSFORMER DURING THIS TEST USE AN A.C. VOLT-
METER, HAVING 5000 OHMS PER VOLT OR MORE SENSITIVITY, IN
THE FOLLOWING MANNER; CONNECT A 1500 OHM 10 WATT RESIS-
TOR, PARALLELED BY A .15 MFD. 150.V A.C TYPE CAPACITOR
BETWEEN A KNOWN GOOD EARTH GROUND (WATER PIPE, CON-
DUIT, ETC.) AND THE EXPOSED METALLIC PARTS, ONE AT A TIME.
MEASURE THE A.C. VOLTAGE ACROSS THE COMBINATION OF 1500
OHM RESISTOR AND .15 MFD CAPACITOR. REVERSE THE A.C. PLUG
AND REPEAT A.C. VOLTAGE MEASUREMENTS FOR EACH EXPOSED
METALLIC PART. VOLTAGE MEASURED MUST NOT EXCEED 75
VOLTS R.M.S. THIS CORRESPONDS TO 0.5 MILLIAMP A.C ANY
VALUE EXCEEDING THIS LIMIT CONSTITUTES A POTENTIAL SHOCK
HAZARD AND MUST BE CORRECTED IMMEDIATELY.
SUBJECT: GRAPHIC SYMBOLS
THE LIGHTNING FLASH WITH APROWHEAD SYMBOL. WITHIN
AN EQUILATERAL TRIANGLE, IS INTENDED TO ALERT THE
SERVICE PERSONNEL TO THE PRESENCE OF UNINSULATED
“DANGEROUS VOLTAGE” THAT MAY BE OF SUFFICIENT MAG-
NITUDE TO CONSTITUTE A RISK OF ELECTRIC SHOCK.
THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIAN-
GLE IS INTENDED TO ALERT THE SERVICE PERSONNEL TO
THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN
SERVICE LITERATURE.
SUBJECT : X-RADIATION
1. BE SURE PROCEDURES AND INSTRUCTIONS TO ALL SERVICE PER-
SONNEL COVER THE SUBJECT OF X-RADIATION. THE ONLY POTEN-
TIAL SOURCE OF X-RAYS IN CURRENT T.V. RECEIVERS IS THE PIC-
TURE TUBE. HOWEVER, THIS TUBE DOES NOT EMIT X-RAYS WHEN
THE HIGH VOLTAGE IS AT THE FACTORY SPECIFIED LEVEL. THE
PROPER VALUE IS GIVEN IN THE APPLICABLE SCHEMATIC. OPERA-
TION AT HIGHER VOLTAGES MAY CAUSE A FAILURE OF THE PIC-
TURE TUBE OR HIGH VOLTAGE SUPPLY AND, UNDER CERTAIN CIR-
CUMSTANCES, MAY PRODUCE RADIATION IN EXCESS OF DESIR-
ABLE LEVELS.
2. ONLY FACTORY SPECIFIED C.R.T. ANODE CONNECTORS MUST BE
USED. DEGAUSSING SHIELDS ALSO SERVE AS X-RAY SHIELD IN
COLOR SETS, ALWAYS RE-INSTALL THEM.
3. IT IS ESSNTIAL THAT SERVICE PERSONNEL HAVE AVAILABLE AN
ACCURATE AND RELIABLE HIGH VOLTAGE METER. THE CALIBRA
TION OF THE METER SHOULD BE CHECKED PERIODICALLY
AGAINST A REFERENCE STANDARD, SUCH AS THE ONE AVAILABLE
AT YOUR DISTRIBUTOR.
4. WHEN THE HIGH VOLTAGE CIRCUITRY IS OPERATING PROPERLY
THERE IS NO POSSIBILITY OF AN X-RADIATION PROBLEM. EVERY
TIME A COLOR CHASSIS IS SERVICED. THE BRIGHTNESS SHOULD
BE RUN UP AND DOWN WHILE MONITORING THE HIGH VOLTAGE
WITH A METER TO BE CERTAIN THAT THE HIGH VOLTAGE DOES
NOT EXCEED THE SPECIFIED VALUE AND THAT IT IS REGULATING
CORRECTLY, WE SUGGEST THAT YOU AND YOUR SERVICE ORGA-
NIZATION REVIEW TEST PROCEDURES SO THAT VOLTAGE REGU-
LATION IS ALWAYS CHECKED AS A STANDARD SERVICING PROCE-
DURE. AND THAT THE HIGH VOLTAGE READING BE RECORDER ON
EACH CUSTOMER’S INVOICE.
5. WHEN TROUBLESHOOTING AND MAKING TEST MEASUREMENTS IN
A PRODUCT WITH A PROBLEM OF EXCESSIVE HIGH VOLTAGE,
AVOID BEING UNNECESSARILY CLOSE TO THE PICTURE TUBE AND
THE HIGH VOLTAGE SUPPLY. DO NOT OPERATE THE PRODUCT
LONGER THAN IS NECESSARY TO LOCATE THE CAUSE OF EXCES
SIVE VOLTAGE.
6. REFER TO HV. B+ AND SHUTDOWN ADJUSTMENT PROCEDURES
DESCRIBED IN THE APPROPRIATE SCHEMATIC AND DIAGRAMS
(WHERE USED).
SUBJECT: IMPLOSION
1. ALL DIRECT VIEWED PICTURE TUBES ARE EQUIPPED WITH AN INTE
GRAL IMPLOSION PROTECTION SYSTEM, BUT CARE SHOULD BE
TAKEN TO AVOID DAMAGE DURING INSTALLATION, AVOID
SCRATCHING THE TUBE. IF SCRATCHED REPLACE IT.
2. USE ONLY RECOMMENDED FACTORY REPLACEMENT TUBES.
SUBJECT : TIPS ON PROPER INSTALLATION
1. NEVER INSTALL ANY PRODUCT IN A CLOSED-IN RECESS, CUBBY-
HOLE OR CLOSELY FITTING SHELF SPACE. OVER OR CLOSE TO
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 RADIA-
TORS WHERE STEAM LEAKAGE IS A FACTOR, ETC.
3. AVOID PALCEMENT WHERE DRAPERIES MAY OBSTRUCT REAR
VENTING. THE CUSTOMER SHOULD ALSO AVOID THE USE OF DEC-
ORATIVE SCARVES OR OTHER COVERINGS WHICH MIGHT
OBSTRUCT VENTILATION.
4. WALL AND SHELF MOUNTED INSTALLATIONS USING A COMMER-
CIAL 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
TEST ON CUSTOMIZED INSTALLATIONS.
5. CAUTION CUSTOMERS AGAINST THE MOUNTING OFAPRODUCT ON
SLOPING SHELF OR A TILTED POSITION, UNLESS THE PRODUCT IS
PROPERLY SECURED.
6. A PRODUCT ON A ROLL-ABOUT CART SHOULD BE STABLE ON ITS
MOUNTING TO THE CART. CAUTION THE CUSTOMER ON THE HAZ-
ARDS OF TRYING TO ROLL A CART WITH SMALL CASTERS ACROSS
THRESHOLDS OR DEEP PILE CARPETS.
7. CAUTION CUSTOMERS AGAINST THE USE OF A CART OR STAND
WHICH HAS NOT BEEN LISTED BY UNDERWRITERS LABORATORIES,
INC. FOR USE WITH THEIR SPECIFIC MODEL OF TELEVISION
RECEIVER OR GENERICALLY APPROVED FOR USE WITH T.V.’S OF
THE SAME OR LARGER SCREEN SIZE.
8. CAUTION CUSTOMERS AGAINST THE USE OF EXTENSION CORDS,
EXPLAIN THAT A FOREST OF EXTENSIONS SPROUTING FROM A SIN-
GLE OUTLET CAN LEAD TO DISASTROUS CONSEQUENCES TO
HOME AND FAMILY.
PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS
A.C. VOLTMETER
GOOD EARTH GROUND
SUCH AS THE WATER
PIPE. CONDUIT. ETC
PLACE THIS PROBE
ON EACH EXPOSED
METAL PART
www.rtv-horvat-dj.hr

1-4
SERVICING PRECAUTIONS
CAUTION : Before servicing the DVD player covered by this
service data and its supplements and addends, read and fol-
low the SAFETY PRECAUTIONS. NOTE : if unforeseen cir-
cumstances create conflict between the following servicing
precautions and any of the safety precautions in this publi-
cations, always follow the safety precautions.
Remembers Safety First:
General Servicing Precautions
1. Always unplug the DVD player AC power cord from theAC
power source before:
(1)Removing or reinstalling any component, circuit board,
module, or any other assembly.
(2)Disconnection or reconnecting any internal electrical
plug or other electrical connection.
(3)Connecting a test substitute in parallel with an elec-
trolytic 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 player or any
of its assemblies.
3. Unless specified otherwise in this service data, clean
electrical contacts by applying an appropriate contact
cleaning solution to the contacts with a pipe cleaner,
cotton-tipped swab, or comparable soft applicator.
Unless specified otherwise in this service data, lubrication
of contacts is not required.
4. Do not defeat any plug/socket B+ voltage interlocks with
whitch instruments covered by this service manual might
be equipped.
5. Do not apply AC power to this DVD player and/or any of
its
electrical assemblies unless all solid-state device heat
sinks are cerrectly installed.
6. Always connect test instrument ground lead to the
appropriate ground before connection 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 1M-
ohm.
Note 1 : Accessible Conductive Parts including Metal pan-
els, 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 a “anti-static” can
generate electrical charges sufficient to damage ES
devices.
5. Do not use freon-propelled chemicals. These can
generate electrical charge sufficient to damage ES
devices.
6. Do not remove a replacement ES device from its protec
tive 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 elec-
tricity sufficient to damage an ES device.)
www.rtv-horvat-dj.hr

1-5
SPECIFICATIONS
DVD VIDEO PLAYER
Power supply 100~240V, 50/60Hz
Power consumtion 20W
Mass 3.5kg(7.7lbs)
External dimensions 430 x 80 x 298 (W x H x D)
Signal system NTSC
Laser Semiconductor laser, wavelength 655nm(DVD)/795nm(CD)
Frequency range (digital audio) 2Hz to 44kHz
Signal-to-noise ratio (digital audio) More than 105dB (EIAJ)
Audio dynamic range (digital audio) More than 95dB (EIAJ)
Harmonic distortion(digital audio) 0.003%
Wow and flutter Below measurable level (less than +0.001%(W.PEAK)) (EIAJ)
Operations Temperature : 5˚C(41˚F) to 35˚C(95˚F),
Operation status : Horizontal
OUTPUTS
Video outputs 1.0V(p-p), 75Ω, negative sync., RCA jack x 1
S video outputs (Y)1.0V(p-p), 75Ω, negative sync.,Mini DIN 4-pin x 1
(C)0.286V(p-p), 75Ω
Component video output (Y)1.0V(p-p), 75Ω,negative sync., RCA jack x 1
(Pb)/(Pr) 0.7V(p-p), 75Ω
Audio output(digital audio) 0.5V(p-p), 75Ω, RCA jack X 1
Audio output(optical audio) Optical connector x 1
Audio output(analog audio) 2.0Vrms (1kHz, 0dB), 330Ω, RCA jack (L, R) x 1
*Designs and specifications are subject to change without notice.
*Weight and dimensions shown are approximate.
www.rtv-horvat-dj.hr

1-6
LOCATION OF CUSTOMER CONTROLS
open/close
play stop
pause/step
skip
select/enter
slow/scan
menu
power
r
e
v
f
w
d
11. POWER/STANDBY BUTTON AND INDICATOR
12. DISPLAY WINDOW
13. PAUSE/STEP BUTTON
14. MENU BUTTON
15. SELECT/ENTER BUTTON
16. SHUTTLE RING
17. ARROW BUTTONS
18. SKIP BUTTONS
19. STOP BUTTON
10. PLAY BUTTON
11. DISK TRAY
12. OPEN/CLOSE BUTTON
1. COAXIAL DIGITAL AUDIO OUT JACK
2. COMPONENT VIDEO OUT JACKS
3. AUDIO OUT(R/L) JACKS
4. POWER CORD
5. S-VIDEO OUT JACK
6. VIDEO OUT JACK
7. DOLBY DIGITALAUDIO OUT JACKS
8. OPTICAL DIGITAL AUDIO OUT JACKS
FRONT PANEL
DOLBY DIGITAL 5.1CH COMPONENT
VIDEO OUT
AUDIO
OUT
Pb
Pr
VIDEO
OUT
Y
S-VIDEO
OUT
L
R
L
R
DIGITAL OUT
COAXIAL
OPTICAL
CENTER WOOFER
FRONT REAR
REAR PANEL
FRONT PANEL REAR PANEL
1
1 2 3 4
12 11 10 79 8
7 6 58
2 3 4 5 6
www.rtv-horvat-dj.hr

1-7
***TITLE button
Use the TITLE button to display the title screen
included on DVD video discs. To operate a menu
screen, follow the instructions in “Using a Title Menu”.
Display Window
REMOTE CONTROL
POWER button DVD/VCR/CATV/TV
Selector Switch
PLAY button
REV SKIP button
CLEAR button
FWD/REV SLOW/SCAN
Shuttle Ring
*MENU button
Use the MENU button to display the menu screen
included on DVD video discs. To operate a menu
screen, follow the instructions in “Using a DVD
Menu”.
**Directional arrow buttons
(up, down, left, right) for use in highlighting a selection
on a GUI menu screen, TITLE and MENU screen.
FWD button
STOP button
OPEN/CLOSE button
**ARROW(Volume/Channel) buttons
RETURN(TV INPUT) button
SOUND(MUTE) button
PROGRAM button
MARKER-SEARCH button
ZOOM button
RANDOM button
A-B button
*MENU button
***TITLE buttons
PAUSE/STEP button
ANGLE button
SUBTITLE button
AUDIO button
SETUP button
REPEAT button
NUMBER button
RESUME button
DISPLAY button
SELECT/ENTER button
1. Title number indicator
2. DVD indicator
3. CD indicator
4. Repeat playback mode indicators
5. RANDOM indicator
6. Total playing time
6. /elapsed time indicator
7. Operating status indicator
8. Angle icon indicator
9. Chapter/Track number indicator
1
987 6
23 4 5
www.rtv-horvat-dj.hr

2-2
DISASSEMBLY
CAUTION BEFORE STARTING SERVICING
Electronic parts are susceptible to static electricity and may easily damaged, so do not forget to take a
proper grounding treatment as required.
Many screws are used inside the unit. To prevent missing, dropping, etc. of the screws, always use a
magnetized screw driver in servicing. Several kinds of screws are used and some of them need special
cautions. That is, take care of the tapping screws securing molded patrs and fine pitch screws used to secure
metal parts. If they are used improperly, the screw holes will be easily damaged and the parts can not be fixed.
(A)
Top Case
(A) (A)
(A)
(A)
(A)
(A)
Tray Door
Disc Tray
Front Panel Stopper
Stopper
(B)
(B)
CABINET DISASSEMBLY
1. Top Case
1. Release 7 screws (A). (See Fig. 2-1)
2. Lift the top case with holding the back of it,
and remove it in the direction of the arrow
Fig. 2-1
Fig. 2-2
Fig. 2-3
3. Front Panel
1. Eject the disc tray. (See Fig. 2-2)
2. Remove the tray door. (See Fig. 2-2)
3. Release 2 screws (B).
4. Pull the front panel toward you while pressing
7 stoppers to disengage, and remove the front
panel. (See Fig. 2-3)
2.Tray Door
1.Eject the disc tray.
2.Lift up the tray door in the direction of the
arrow.
www.rtv-horvat-dj.hr

2-3
Main Circuit Board Flexible
connector
Flexible
connector
A/V Circuit Board
(C)
(C)
(C)
(C)
(C)
(C)
(C)
(C)
(C)
(C)
(E)
(E)
(E)
(E)
(E)
(E)
Digitron
Circuit Board
Key
Circuit Board
Power Code
Power
Circuit
Board
(D) (D)
(D)
(D)
Fig. 2-4
Fig. 2-5
Fig. 2-6
CIRCUIT BOARD DISASSEMBLY
Note:
Before removing the main circuit board, be sure to
shortcircuit the laserdiode output land.
After replacing the main circuit board, open the land
after inserting the flexible connector.
(Refer to Mechanism Disassembly)
1. Main/A/V Circuit Board
1. Remove the top case.(See Fig.2-1)
2. Release 10 screws (C), and take out the main /
AV circuit board.(See Fig.2-4)
3.Remove the flexible connectors and the
connector from main circuit board.
4. Then, remove the main A/V circuit board.
2. Power Circuit Board
1. Relrase 4 screws(D). (See Fig. 2-5)
3. Digitron and Key Circuit Board
1. Remove the front panel.(See Fig. 2-3)
2. Release 8 screws(E), and remove the digitron
circuit board.
www.rtv-horvat-dj.hr

2-4
EXPLODED VIEWS
1. Cabinet and Main Frame Section
463
260
452
462
250 462
462
462
462
463
463
A47
A43
A00
463
A46
PBS00
PBK00
PBT00
452
283
463
280
277
278
463 452
463
A48
463
463
300
PBJ00
455
A
5 4 3 2 1
BCD
www.rtv-horvat-dj.hr

2-5
2.Packing Accessory Section
3.Remote Control Section
BATTERY
808
CABLE
806
PACKING SHEET
804
PACKING
803
811
812
813
OWNER'S MANUAL
801
REMOCON
900
BOX CARTONX
802
PACKING
803
902 903 904
905
901
906
908 907
909
900
www.rtv-horvat-dj.hr

3-2
Replace Q908
and Q909.
1. Power Circuit
• Input Voltage : 90V - 135V
• It is possible to malfunction, if the unload condition is left for a long time when power is on.
(More than Dummy load 100mA)
• A Primary side is abnormal when the fuse is short, secondary side is abnormal when the IC103 oscillates
intermittently.
• The resistor value of both terminal is measured with DVM crossing each other to check the each element is
normal or abnormal. (It is normal when the numerical value is different each other.)
ELECTRICAL TROUBLESHOOTING GUIDE
Is F901 normal?
Is IC901 Pin 3
switching normally?
<Fig.3-1>
A primary side is abnormal.
Check the GND of C901 and
IC901 Pin 3with oscilloscope.
When IC901
oscillating
Secondary side
is abnormal.
In condition of DC140V.
(Feedback is abnormal)
After connect
CON903
Pin 1, 3short.
YES
YES YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
NO
NONO
NO
NO
NO
(Fig. 3-1) IC901 Pin 3
Normal switching waveform on the
stand-by mode at the AC110V
NO
NO
NO
NO
NO
NO
NO
NO
Is CN903 Pin 35.2V?
Is voltage of BD901 140V?
Are R907, D902,
D903 and R902
normal?
Are D901, R904,
R905 and R906
normal?
Is PC901 normal?
Are CON902
Pin 5, 6and 95V?
Is CON904 Pin 3 8V?
Is CON902 Pin 312V?
Are CON903 Pin 5
-24V, Pin 7-20V and
Pin 8-16V?
END
END
(A)
To (A).
START
Does oscillate
continuously when
the CON903 is
disconnected ?
Front Circuit
Board is
abnormal
Are D908, D909,
D907, D910, D906
and D905 normal?
Replace
defective
parts.
Check Q904
and ZD903.
Replace
IC902.
Replace defective
parts.
Check or
replace
D908.
Are R922, C927,
R921 and R918
normal?
Is CON903 Pin 3
5.2V?
Is IC905
normal?
www.rtv-horvat-dj.hr

3-3
Replace IC101.
Refer to Front Part
Check short
Reconnect it.
2. µ-COM Circuit
A. No Power
Does Logo appear
on the screen?
Is oscillation of
X101 normal?
Are IC107 Pin 14 ,28
and 29 normal?
Do all five Bars appear?
Power RED LED on?
Does Bar appear at FLD?
Is CON107
connected normally?
Is CON107 Pin6 normal?
The
waveform on A[00:21]
and D[00:15] of IC108
normal?
Are IC101 Pin 7, 8normal?
Replace Main B/D.
Refer to Front Part.
Check the oscillation
Check short.
OK
Replace IC107
or IC108.
Check power.
(Refer to power)
If power is
normal
OK
POWER ON
1
1
YES
YES
YES
YES
YES
YES
YES
YES
YES
A
NO
NO
NO
NO
NO
NO
NO
NO
NONO
NO
A
www.rtv-horvat-dj.hr

3-4
B. Audio abnormal
D. Open/Close abnormal
Check the
connection of CON107.
Check IC101 Pin 13 , 14.
Check Audio jack.
YES (If OK)
YES
NO
NO
YES
YES (If OK)
YES
YES (If OK)
YES (If OK)
YES (If OK)
Check PLL FC of MPEG part.
Refer to Audio part.
Refer to MPEG part.
Replace B/D.
Check Front.
Reconnect it.
Refer to SERVO part.
Check the connection of MD.
AUDIO ABNORMAL
OPEN/CLOSE ABNORMAL
C. Video abnormal
Check Video jack.
YES (If OK)
YES (If OK)
YES (If OK)
YES (If OK)
Refer to Video part.
Refer to Encoder part.
Refer to MPEG part.
Replace B/D.
VIDEO ABNORMAL
www.rtv-horvat-dj.hr

3-5
E. Picture abnormal
Check the disc.
If OK
YES (If OK)
YES (If OK)
Refer to Servo part
Check PLL IC of MPEG part
Check DSP
Check MPEG
YES (If OK)
Replace B/D
PICTURE ABNORMAL
F. Disc Error
Check Disc
YES (If OK)
YES (If OK)
Refer to Servo part
Replace B/D
DISC ERROR
www.rtv-horvat-dj.hr

3-6
Power is on
Does LG Logo appear
on the screen?
Does the
moving picture of the DVD Disc
play on the screen
normally?
Is MPEG data signal normal?
Is error signal normal?
Is MPEG data signal normal?
Is Clock normal?
Does the audio
sound output from MPEG
decoder?
Does the
moving picture of the video
CD play on the screen
normally?
Does the audio sound
output normally?
END
Check power & clock. A
Check CD/DVD DSP output
signal. B
Check MPEG Decoder input
signal. C
D
E
F
G
H
I
Check CD/DVD DSP output
signal.
Check MPEG Decoder input
signal.
Check CD/DVD DSP output
signal.
Check MPEG Decoder input
signal.
Check clock signal
Check clock signal
YES
YES
YES
YES YES
YES
YES
YES
YES
YES
NO
NO NO
OK OK
OK
OK
NO
NO
NO
NO
NO
3. MPEG Circuit
_OPTION
_If included VCD function.
www.rtv-horvat-dj.hr

3-7
NO
NO
NO
START
Does remote control
work normally?
Do all the
buttons work
normally?
Check waveform of
IC500 Pin13 .
Check waveform
of Q500 Pin 2.
Is Digitron on normally?
LED ON?
Check waveform
of IC500 Pin 6.
Is oscillation of
X501 normal?
Is waveform of IC500
Pin78 normal? Check waveform of IC500 Pin13 .
Does pulse
waveform of RE500 Pin 3
appear?
Is IC500
Pin24 connected to
RE500 Pin 3?
Is RE500 Pin 25V?
Power on.
Check and replace R516,
R507, R506, R500, R505,
R504, R512 and R503.
Solder defective parts again
Solder defective parts
Replace Q500.
Solder Key part.
Check Power.
Replace IC501.
Replace IC500.
Replace LED501.
Replace RE500
Re-solder.
Recheck
Replace IC500.Complete repairing Front B/D.
NO
NO
NO
NO
NO
NONONO
NO
YES
YES YES
YES
YES YES
YES
YES
YES YES
YES
YES YES
YES
YES
YES
CD
4. Front Circuit (Digitron & key)
www.rtv-horvat-dj.hr

3-8
Does signal pulse
input to IC206 Pin 58 , 59 when
the powe is on?
Does signal goes
"High" to IC206 Pin194 when the
power is on?
Does
TTL pulse output to
IC206 Pin14, 14?
Does
33.8688MHz clock input
to IC206 Pin 63?
Is IC206
Pin83, 84, 88, 89 voltage
about 2.2V?
Replace IC206
(IC206 soldering or IC defect).
Replace IC700
(IC700 soldering or IC defect)
Check "2.µ-COM Part".
Replace X301 or
IC308(30MHz clock defect)
CHECK POINT(General)
5. RF/Servo Circuit
A.
END
NO
NO
NO NO
NO
YES
YES
YESYES
YES
www.rtv-horvat-dj.hr

3-9
Does tray open or close?
Does the pick-up
slide inner or outer
track?
Fig.1. SLED Driver waveform
Fig.2. Focus Driver waveform
Does
the voltage change
at IC401 Pin 15 , 16 more than
2V on the basis of
4.5V?
Pressing
the open/close key
repeatedly, check the voltage of
CON202 Pin 9 change
0V to 5V
Junction Board
Does
CON202 Pin17 change
high to low?
Does
the pick-up lens move up
and down?
Check Focus Driver output.
(IC206 Pin 83, IC401 Pins 11,12)
Check SLED Driver output.
IC206 Pin 88 IC401 Pins 18 ,17.
IC206 Pin 88 no output : IC206 is defective
IC401 Pin 18 no output : IC401 is defective
IC206 Pin 83 no output : IC700 is defective
IC401 Pin 1, 2no output : IC701 is defective
DECK assembly is defective.
Slide the pick-up to
inner track.
Power on Check loading Part.
Push Pick-up to inner track to
the end by hand.
DECK assembly is defective.
(Limit sw)
check µ-COM Part.
Replace IC401.
No disc
B.
END
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
www.rtv-horvat-dj.hr

3-10
FOCUS ON?
Check
the focus error moving the
lens up and down.
(IC201 Pin 21)
Does the
TTL level change at IC206
Pin 78 and 13 moving
the lens?
Does the disc turn?
IC206 Pin16 is "High"?
Is OK the track jump. Does the signal
pulse input at IC700 Pin 27,
28 , and 29?
Does the screen appear?
OPEN/CLOSE
Replace µ-COM or IC206.
Replace IC206.
Check IC201 Pin 52 , 53 , 54 , 55 in DVD Mode
Check IC201 Pin 58 , 59 , 60 , 61 in CD Mode
Fig.3. FOCUS ERROR waveform
IC201 no output : Pick-up is defective.
Check IC206 and IC403 when the Pin 4is abnormal
Check CON404 Pin4, 6 Motor
turn when the Pin4 is less than 1.6V
Check A
Video Par is defective.
Check "5.MPEG Circuit."
Check "7.OSD/Video Circuit." Replace IC700.
µ-COM part is
defective. Check
"2.µ-COM Circuit."
DISC IN
C.
END
NO
NO
NO
NO NO
NO
NO
NO
YES YES
YES
YES
YES
YES YES
YES
www.rtv-horvat-dj.hr

3-11
Is the eye-pattern vivid? Does the
sawtooth waveform emit
at IC201 Pin 20 ?Does the 1.6V emit?
Check RF Eye-Pattern.
RF : 1.0-2.1V(IC201 Pin 28)
Fig.5. RF
waveform
Check IC201 Pin 52 ,53 ,54 ,55 in DVD Mode.
Check IC201 Pin 58 ,59 ,60 ,61 in CD Mode.
No signal: Pick-up is defective
Replace IC206. Check IC206 Pin84.
No signal at IC206 : IC206 is defective
• Check IC206 Pin 162
• Check the clock at the IC206 Pin 28, 30 .
• Both are normal : IC206 is defective
Replace IC201.
CHECK A
D.
END
NO
NO NO NO
YES
YES YES YES
www.rtv-horvat-dj.hr

3-12
BLOCK DIAGRAMS 1. Overall Block Diagram
M
M
POWER CONTROL
RXDO/TXDO/SCKO
F_Reg/M_Reg/M_Reset/MD_SW
LOADING DRIVE
SENS, FOK, SLD_FG,
MSDAT0,DEFECT,DSP_SENSE,
SQSO, SQCK, SCOR, AO[0:5]
XLAT, S_CLK, S_DATA, DO[0:7]
27MHz VDATA[0:7] Hsync Vsync
Composite,Y, C
Component
DVD_LDQM, DVD_SD_CS1
DVD_MA[0:11]
DVD_MD[0:15]
DVD_SD_CS0,
DVD_UDQM
DVD_DATA[0:7]
SDCLKI, ZISENB
REQZI
33.8688MHz
DA_DATA,
DA_LRCK,
DA_BCK
DA_XCK
DVD_SD_CAS,
DVD_SD_RAS
DVD_SD_CLK
DVD_MWE
D[00:07]
A[00:02]
S_CLK, S_DATA,
DPLL_L
IIC_DATA,
IIC_CLK
DAC_L0,
S_CLK
S_DATA L
L
AUDIO
OUT
VIDEO OUT
R
Composite
CY
RFILTER
AMP
DA_DATA,
DA_LRCK,
DA_BCK
27MHz
X-TAL
SPINDLE_FG, SLD_FG
FDO,TDO,
FMO
MON, SPINDLE_DRV
TEBAL, FEBAL,
DPOCTL, EQF, EQB
FE,TE, RFRP, SBADD, DVD/CD RF
ICADDR[0:8] ICDATA[00:15]
RFRP, RFCen,
TE,Vref
DVD : A, B, C, D
DVD : RF
CD : A, B, E, F
spindle
Loading
focus, tracking sled
SPINDLE
MOTOR
DISC
LOADING
MOTOR
OPEN S/W
CLOSE S/W
LIMIT S/W
DECK MECHANISM
AC 100
~240V,
50
~60Hz
-22.5V
-27V
-21.8V
+9V
+5VA
+5VD
+5VU
AGND,GND,UGND
PICK
UP
PbPrY
FILTER
IC308
PLL1700
CLOCK
GENERATROR
IC400
BA6859FP
SPINDLE
MOTOR
DRIVER
IC401
BA5983
POWER
DRIVER
IC206
DVDSP-3301
CD/DVD DSP
DVD SERVO
DRAM
256K x 16bit
Comp.
POWER
BOARD
IC800/IC801
BT865A/861A
NTSC/PAL
Encoder
IC703/IC601~603
PCM176x4
AUDIO
DAC
IC108
SH7034
IC301
ZiVA-3
MPEG A/V
Decoder
IC306
GM72V1621
1M X 16bit
SDRAM
IC307
GM72V1621
1M x 16bit
SDRAM
IC201
TA1254F
RF SIGNAL
PROCESSOR
IC500
LC866112
FL DISPLAY
KEY INPUT
REMOCON
RECEIVER
DRAM
FLASH
MEMORY
www.rtv-horvat-dj.hr