LG RZ-30LZ13 User manual

LCD TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : ML-038A
MODEL : RZ-30LZ13
website:http://biz.LGservice.com
e-mail:http://www.LGEservice.com/techsup.htm
Aug., 2003
Printed in KoreaP/NO : 3828VD0120G

- 2 -
CONTENTS
CONTENTS .............................................................................................. 2
PRODUCT SAFETY ..................................................................................3
CONTROL DESCRIPTIONS......................................................................4
SPECIFICATIONS......................................................................................8
ADJUSTMENT INSTRUCTIONS.............................................................12
TROUBLE SHOOTING............................................................................14
PRINTED CIRCUIT BOARD....................................................................15
BLOCK DIAGRAM...................................................................................19
EXPLODED VIEW .................................................................................. 20
EXPLODED VIEW PARTS LIST..............................................................21
SVC. SHEET ...............................................................................................

- 3 -
PRODUCT SAFETY
IMPORTANT SAFETY NOTICE
This manual was prepared for use only by properly trained audiovisual service
technicians. When servicing this product, under no circumstances should the
original design be modified or altered without permission from LG Electronics
Inc. 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. If any fuse (or Fusible Resistor) in
this TV receiver is blown, replace it only with the factory specified fuse type and
rating. When replacing a high wattage resistor (Oxide Metal Film Resistor, over
1W), keep the resistor 10mm away from PCB. Always keep wires away from
high voltage or high temperature parts.
Special components are also used to prevent 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 Electronis Inc. Service work should be
performed only after you are thoroughly familiar with these safety checks and
servicing guidelines.
Circuit diagrams may occasionally differ from the actual circuit used.
This way, implementation 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 customized installations without manufacturer’s
approval.
Unauthorized modifications will not only void the warranty, but may
lead to property damage or user injury.
GENERAL GUIDANCE
An lsolation Transformer should always be used during the servicing
of a receiver whose chassis is not isolated from the AC power line. Use a
transformer of adequate power rating to protect against personal injury from
electrical shocks. It will also protect the receiver and its components from being
damaged by accidental shorts of the circuitry that may be inadvertently
introduced during the service operation.
Before returning the receiver to the customer, always perform an AC leakage
current check on the exposed metallic parts of the cabinet, such as antennas,
terminals, etc., to be sure the set is safe to operate
without damage of electrical shock.
LEAKAGE CURRENT COLD CHECK
(ANTENNA COLD CHECK)
With the instrument’s AC plug removed from AC source, connect an electrical
jumper across the two AC plug prongs. Place the AC switch in the on position,
connect one lead of ohm-meter to the AC plug prongs tied together, and touch
other ohm-meter lead in turn to each exposed metallic parts such as antenna
terminals, phone jacks, etc. If the exposed metallic part has a return path to the
chassis, the measured resistance should be between 1MΩand 5.2MΩ. When
the exposed metal has no return path to the chassis the reading must be
infinite. Any other abnormality that exists must be corrected before
the receiver is returned to the customer.
ELECTROSTATICALLY SENSITIVE 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 the
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 an ESD mat, 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 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. (Otherwise, seemingly harmless motion, such as the brushing
together of your clothing or the lifting of your foot from a carpeted floor, can
generate static electricity sufficient to damage an ES device.)

- 4 -
All the functions can be controlled with the remote control handset.
Some functions can also be adjusted with the buttons on the front
panel of the set.
Remote control handset
Before you use the remote control handset, please install the bat-
teries. See the next page.
1. POWER
switches the set on from standby or off to standby.
2. MULTIMEDIA
selects RGB or DVI modes.
3. ARC (Aspect Ratio Control)
changes the picture format.
4. PIP BUTTONS
PIP/DW
switches the sub picture on or off.
PR +/-
selects a programme for the sub picture.
SWAP
alternates between main and sub picture.
PIP INPUT
selects the input mode for the sub picture.
WIN.SIZE
adjusts the sub picture size.
WIN POSITION
moves the sub picture to DD/EEor FF/GGdirection.
5. SWAP
returns to the previously viewed programme.
6. MENU
selects a menu.
7. DD/EE(Programme Up/Down)
selects a programme or a menu item.
switches the set on from standby.
FF/GG(Volume Up/Down)
adjusts the volume.
adjusts menu settings.
OK
accepts your selection or displays the current mode.
8. NUMBER BUTTONS
switches the set on from standby or directly select a number.
9. PSM (Picture Status Memory)
recalls your preferred picture setting.
10. SPLIT ZOOM
Enlarge the screen with regular ration.
11. VCR BUTTONS
control a LG video cassette recorder.
123
456
78
0PSM SSM
SIZE REVEAL UPDATE
MIX HOLD
INDEX MODE
TIME
9
POWER
MULTIMEDIA INPUT SELECT
ARC I/II
PIP/DW
TEXT
PR-
PR+
SWAP
MENU PR
PR
MUTE
OK
VOL
WIN.POSITION
SPLIT ZOOM ZOOM-
WIN.SIZE
ZOOM+
SLEEP
LIST
STOP
PLAY FF
REC
REW
P/STILL
VOL
PIP INPUT
?
M
1
2
3
4
6
5
9
11
10
8
7
12
13
14
15
16
17
18
19
CONTROL DESCRIPTIONS

- 5 -
12. INPUT SELECT
selects the remote operating mode.
switches the set on from standby.
13. I/II
selects the language during dual language broadcast.
selects the sound output.
14. TELETEXT BUTTONS
These buttons are used for teletext.
For further details, see the ‘Teletext’ section.
15. MUTE
switches the sound on or off.
16. SSM (Sound Status Memory)
recalls your preferred sound setting.
17. LIST
displays the programme table.
18. SLEEP
sets the sleep timer.
19. ZOOM+ / ZOOM-
Enlarges or reduces the main picture size.
Note : In teletext mode, the PR +/-,SWAP and PIP INPUT buttons
are used for teletext function.
Battery installation
The remote control handset is powered by two AAA type batteries.
To load the batteries, turn the remote control handset over and
open the battery compartment. Install two batteries as indicated by
the polarity symbols ( and ) marked inside the compartment.
Note : To avoid damage from possible battery leakage, remove the
batteries if you do not plan to use the remote control handset for an
extended period of time.
+
-
1 2 3
4 5 6
7 8
0PSM SSM
SIZE REVEAL UPDATE
MIX HOLD
INDEX MODE
TIME
9
POWER
MULTIMEDIA INPUT SELECT
ARC I/II
PIP/DW
TEXT
PR-
PR+
SWAP
MENU PR
PR
MUTE
OK
VOL
WIN.POSITION
SPLIT ZOOM ZOOM-
WIN.SIZE
ZOOM+
SLEEP
LIST
STOP
PLAY FF
REC
REW
P/STILL
VOL
PIP INPUT
?
M
1
2
3
4
6
5
9
11
10
8
7
12
13
14
15
16
17
18
19

- 6 -
1. MAIN POWER (ON OFF)
switches the set on or off.
2. INPUT SELECT
selects TV, AV1, AV2, AV3, S-Video, RGB or
DVI mode.
switches the set on from standby.
3. MENU
selects a menu.
4. FF/GG(Volume Down/Up)
adjusts the volume.
adjusts menu settings.
DD/EE(Program Up/Down)
selects a program or a menu item.
switches the set on from standby.
5. POWER (O /I)
switches the set on from standby or off to
standby.
6. POWER/STANDBY INDICATOR (O)
illuminates red in standby mode.
illuminates green when the set is switched on.
7. REMOTE CONTROL SENSOR
Front panel
1 2 3 5 6
7
4

- 7 -
1. EXTERNAL SPEAKER (6 ohm output)
connect to optional external speaker(s).
2. POWER CORD SOCKET
3. S-VIDEO INPUT
connect video out from an S-VIDEO VCR to
the S-VIDEO input.
4. EURO SCART SOCKET
connect the euro scart socket of the VCR to
these sockets.
5. AERIAL SOCKET
connect the RF socket of the VCR to the aer-
ial socket.
6. RGB INPUT / DVI (Digital Visual Interface)
INPUT
connect the set output socket of the PER-
SONAL COMPUTER to this socket.
Note : This set is only provided the DVI-D
function although DVI jack drawing is DVI-I
jack for connection convenience.
7. AUDIO INPUT
connect audio out from external equipment to
these jack.
8. RS-232C INPUT (CONTROL/SERVICE)
PORT
connect to the RS-232C port on a PC.
Back panel
1 2 43
4
5
8
7
6

1. Application range
This specification is applied to ML-038A chassis.
2. Requirement for Test
Testing for standard of each part must be followed in below
condition.
(1) Temperature: 25°C ± 5°C(But, CST must be tested 40°C ±
2°C (Humidity: 50%))
(2) Humidity: 65% ± 10%
(3) Power: Standard input voltage (AC 230V, 50/60Hz)
(4) Measurement must be performed after heat-run more than
20min.
(5) Adjusting standard for this chassis is followed a special
standard.
3. Test and Inspection method
(1) Capacity: Follow LG electronics TV Testing Standard.
(2) Another Required Standard
EMI: Following CE Standard(EN55020)
SAFETY: Following CB Standard(EN55013)
- 8 -
SPECIFICATION
NOTE : Specifications and others are subject to change without notice for improvement .
4.General Specification
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Video input applicable system
AV input system
Available channel
PC signal input (RGB input)
Input voltage
Market
Active display size
(Diagonal)
Operating temperature
Operating humidity
Storage temperature
Storage humidity
LCD Panel
Lamp
Weight
Size of outline
Speaker reqularity Impedance
Specification
Min Typ Max Unit
1)PAL/SECAM-BG
2)PAL/SECAM-DK
3)PAL-I
4)SECAM-L/L’
1)PAL
2)SECAM
3)NTSC 3.58/ 4.43
1)VHF: E2-E12
UHF: E21-E69
CATV: S1-S20
HYPER: S21-S41
2)L/L’ VHF: B,C, D
VGA, SVGA, XGA(1024x768), SXGA(1280x1024)
AC 230V, 50/60Hz
EU Min 29.53 Max Inch
Min 750.06 Max [mm]
0 29.53 40 Deg
Min 29.53 85 %
-20 29.53 60 Deg
Min 29.53 85 %
LC300W01 - A3P4
TFT Active Matrix LCD panel
697.8 x 431.8 x 50.9 [mm]
Wide (15:9)
1280 x 768
0.5025 x 0.1675 x RGB
Min 6.4 Kg
CCFL type
Min 16 85 EA
Min 99.8 109.8 W
50,000 29.53 85 hrs
1030 1040 1100 Vrms
3 6 6.5 mA
21.5 22.5 23.5 Kg
501.6mm(H) x 1051mm(W) x 109mm(D) mm
6 Ω
Item Remark
No.
Refer to Table1
Active size
Humidity:50%
LG philps LCD
[mm]
Life Time:
Until brightness
of lamp goes to
half of its initial
brightness.
TV + Speaker
TV + Speaker
TWeeter - 8Ω
Model name
Feature
Outline Dimension
Aspect ratio
Resolution
Pixel Pitch
Weight
Backlight System
Quantity
Power consumption
Life time
Operating voltage
Operating current

- 9 -
16
17
18
19
Speaker reqularity Output power
Power on time
External terminals
Power system
Specification
Min Typ Max Unit
Min Typ 20 W
Min Typ 10 Sec
RGB 1 input 1EA
PC sound input 1EA
DVI input 1EA
RS-232C 1EA
Half scart 2EA
Full scart 1EA
RF input 1EA
PFC(Power Factor Correction) & SMPS
Item Remark
No.
D-sub 15pin
Phone Jack
(common to RGB
1 and DVI)
DVI Jack
D-Sub 9pin
1
2
3
4
5
6
7
8
9
10
11
12
13
Remocon code
Local key
Picture
Motion detection
Stereo sound
Dual sound
Teletext
DW(Double window) Mode
Multi picture display mode
Progressive scan
Double window text
Display mode
- Main
Sub- PIP
OSD Language
NEC code only
MENU, D PR E, FVOL G, INPUT SELECT, O/I
Colour Temperature
Contrast
Brightness
Colour
Tint
Sharpness
Dynamic/ Standard/ Mild/ User
Normal/ Cool/ Warm/ User
O (FLI2300)
FM Stereo/ Nicam Stereo
FM Stereo/ Nicam Stereo
TOP, FLOP, LIST, 128 page
0
1 PIP
0
POT(Picture Out Text)
Wide(FULL), 4:3, 14:9, Zoom(Letter Box), Auto ARC
Wide(FULL), 4:3
0/50
Wide(FULL), 4:3
English/ French/ Deutsch/ Spanish/ Italian
Item Specification Remark
No.
EU
7 key
9,350K/13,500K/
8,000K
Classfied receiving
broadcasting form
EU
Flexible window size & position
5. Feature and Function
User Control
PSM
CSM
CVBS, YC, 480I
RGB, ARC
DVI Zoom Step
CVBS, YC, 480I

- 10 -
<Table.1> RGB1 and RGB2 input mode
Vertical Frequency: Standard ± 0.5Hz
±ertical Lines: Standard ± 7 Lines
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Resolution
PC
640*350
640*350
720*400
720*400
640*480
640*480
640*480
640*480
800*600
800*600
800*600
800*600
800*600
800*600
800*600
1024*768
1024*768
1024*768
1024*768
1152*864
1152*864
1152*864
1280*768
1280*768
1280*768
1280*960
1280*960
1280*1024
1280*1024
832*624
H-freq(KHz)
31.468
37.861
31.469
37.927
31.469
37.861
37.500
43.269
35.156
37.879
48.077
46.875
53.674
56.000
64.016
48.363
56.476
60.023
68.677
54.348
67.500
77.487
47.7
60.15
68.596
60.000
75.000
63.981
79.976
49.725
V-freq(Hz)
70.09
85.08
70.08
85.03
59.94
72.80
75.00
85.00
56.25
60.31
72.18
75.00
85.06
90.00
100.00
60.00
70.06
75.02
84.99
60.05
75.00
85.05
60.00
75.00
85.00
60.00
75.00
60.02
75.02
74.55
Pixel clock(MHz)
25.17
31.50
28.32
35.50
25.17
31.50
31.50
36.00
36.00
40.00
50.00
49.50
56.25
57.30
69.65
65.00
75.00
78.75
94.50
80.00
108.00
121.50
80.14
102.90
118.53
108.00
129.60
108.00
135.00
57.28
Proposed
EGA
EGA
DOS
DOS
VESA(VGA)
VESA(VGA)
VESA(VGA)
VESA(VGA)
VESA(SVGA)
VESA(SVGA)
VESA(SVGA)
VESA(SVGA)
VESA(SVGA)
VESA(SVGA)
VESA(SVGA)
VESA(XGA)
VESA(XGA)
VESA(XGA)
VESA(XGA)
VESA(SXGA)
VESA(SXGA)
VESA(SXGA)
GTF. (WXGA)
GTF. (WXGA)
GTF. (WXGA)
VESA(SXGA)
VESA(SXGA)
VESA(SXGA)
VESA(SXGA)
Macintosh(16”)
Remark
RGB 1 only
RGB 1 only
RGB 1 only

- 11 -
<Table.2> Scart arrangement 1 (Full Scart)
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
Signal
Audio output B (right)
Audio input B (right)
Audio output A (left)
Ground(audio)
Ground(blue)
Audio input A(left)
Blue input
Function select
(AV control)
Ground(Green)
Comms data2
Green input
Comms data1
Ground(Red)
Ground(Blanking)
Red input
RGB Switching control
Ground(Video input & Output)
Ground(RGB Switching control)
Video output(Composite)
Video input(Composite)
Common ground(Shield)
Signal Level
0.5Vrms
0.5Vrms
0.5Vrms
-
-
0.5Vrms
0.7V
High(9.5 - 12V) - AV Mode
Mid(5-8V) - Wide Screen
Low(0-2V) - TV Mode
-
0.7V
-
-
0.7V
High(1 - 3V) -RGB
Low(0 - 0.4V) - Composite
-
-
1V including sync
1V including sync
-
Impedance
< 1 kΩ
> 10 kΩ
< 1 kΩ
-
-
> 10 kΩ
75 Ω
>10 kΩ
-
75 Ω
-
-
75 Ω
75 Ω
-
-
75 Ω
75 Ω
-
<Table.3> Scart arrangement 2 (Half Scart)
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
Signal
Audio output B (right)
Audio input B (right)
Audio output A (left)
Ground(audio)
Ground(blue)
Audio input A(left)
-
Function select
(AV control)
Ground(Green)
Comms data2
Comms data1
Ground(Red)
Ground(Blanking)
Red input
Ground(Video input & Output)
Video output(Composite)
Video input(Composite)
Common ground(Shield)
Signal Level
0.5Vrms
0.5Vrms
0.5Vrms
-
-
0.5Vrms
-
High(9.5 - 12V) - AV Mode
Mid(5 - 8V) - Wide Screen
Low(0 - 2V) - TV Mode
-
-
-
-
0.7V
-
-
1V including sync
1V including sync
-
Impedance
< 1 kΩ
> 10 kΩ
< 1 kΩ
-
-
> 10 kΩ
-
>10 kΩ
-
-
-
-
75 Ω
-
-
75 Ω
75 Ω
-

- 12 -
1. Application Object
These instructions are applied to all of the MODELS of LCD
MONITOR, ML-038A chassis.
2. Notes
(1) Because this is not a hot chassis, it is not necessary to use
an isolation transformer. However, the use of isolation
transformer will help protect test instrument.
(2) Adjustment must be done in the correct order. But, it can
be changed in consideration of mass production.
(3) The adjustment must be performed in the circumstance of
25±5°C of temperature and 65±10% of relative humidity if
there is no specific designation.
(4) The input voltage of the receiver must keep 230V, 60Hz in
adjusting.
[Input voltage is possible from 195V to 264V because the
power voltage applied to this chassis is Wide-Range. But,
adjustment should be operated in 230V/60Hz if there is no
specific designation.
(5) The receiver must be operated for about 15 minutes prior
to the adjustment.
¤After receiving 100% white pattern(06CH), the receiver
must be operate prior to adjustment.(Or white condition
in HEAT-RUN mode)
¤ŁEnter into HEAT-RUN mode
- Select ‘White’ by pressing ‘POWER ON’ key on SVC
communicator.
[Caution] If you turn on a still screen more than 20 minutes , a
afterinage may be occur in the black level part of the
screen.
3. Whole Assembly Adjustment
<Caution> Each PCB Assy must be checked by Check JIG Set
before assembling.(Be careful about power PCB
ASSY which can give a fatal damage to the LCD
Module)
3-1. White Balance Adjustment
(1) Required Equipment
Color analyzer(CA-100 or same production)
(2) Connection Diagram of Equipment for
Measuring (Automatic Adjustment)
Connect RS-232C to Adjustment Equipment and SET.
Automatization operating room has in charge of managing
and repairing about adjusting equipment.
Only adjust HIGH LIGHT and RGB input adjusts R-H, G-H
automatically.
Automatic adjustment equipment decides the values of R-
GAIN/G-GAIN/B-GAIN by correcting color coordinates/white
balance and transmits them into SET(Use the RS-232C) and
finally the SET saves data values.
(3) White Balance Adjustment(Manual Adjustment)
¯Operate Zero Calibration of CA-100 and Sensor must be
stick completely to the surface of LCD module
¯Devide Manual adjustment into AV/PC and operate
adjustment by the following sequence.
¯Manual adjustment is a temporary method when automatic
adjustment is not correspondent.
1) Select WHITE PATTERN of HEAT RUN mode by
pressing ‘POWER ON’ key on SVC communicator and
then operate HEAT RUN more than 15 minute
2) Supply pattern signal for W/B adjustment in pattern
generator. (External INPUT)
3) Low Light has no special adjustment.
4) To adjust High Light, stick sensor to 2) pattern(White)
and after select the R - H and G - H by pressing ADJ
button on SVC communicator, press the Vol +/- Key
and adjust it until color coordination becomes.
color coordination : X=0.283±0.025, Y=0.296±0.025
color temperature : 9,300°K ± 1000°K
5) Exit adjustment mode using Enter button.
ADJUSTMENT INSTRUCTION
Window
MASTER or
QUANTUM DATA
COLOR
ANALYZER
TYPE;CA-100
RGB Signal Input
LCD MONITOR
High Light
450±70cd/m2
(Fig. 1) Connection Diagram of Automatic Adjustment
Model name
Communication
setting
Type
Baud rate
115200
Data bit
8
Stop bit
1
Parity bit
NONE
Protocol
Setting
Index
R-H
G-H
R-Gain
G-Gain
Cmd 1
j
j
j
j
Cmd 2
d
e
a
b
Data Min. Value
0
0
0
0
Max. Value
100
100
100
100
ML-038A RZ-30LZ13
RS-232C

- 13 -
3-2. EDID (The Extended Display
Identification Data) /DDC(Display Data
Channel) Adjustment
(1) This is the function that is made for the realization of “Plug
and Play” which makes possible to use the user
environment right after reorganization by communicating
with monitor automatically.
(2) EDID DATA for DVI of ML-038A(Data for DDC)
EDID table =
(3) EDID DATA for RGB of ML-038A
EDID table =
(4) Refer to Service Manual related to EDID communication.
00
10
20
30
40
50
60
70
00
00
33
13
61
13
40
4B
00
01
FF
0B
48
59
00
88
1E
52
02
FF
01
4B
81
83
13
50
5A
03
FF
01
AF
4F
82
00
0D
2D
04
FF
81
EF
71
21
5E
00
33
05
FF
40
80
59
00
05
0A
30
06
FF
26
31
BC
00
32
20
4C
07
00
96
40
34
18
00
20
5A
08
1E
08
31
00
4D
00
20
31
09
6D
B7
59
98
1F
1E
20
33
0A
D7
FB
3B
51
00
00
20
0A
0B
3A
A1
D9
00
90
00
20
20
0C
01
56
45
2A
51
00
00
20
0D
01
48
40
40
00
FD
00
20
0E
01
98
45
30
1B
00
00
00
0F
01
24
59
70
30
38
FC
DF
00
10
20
30
40
50
60
70
00
00
33
13
61
13
20
55
00
01
FF
0B
48
59
00
40
1E
52
02
FF
01
4B
81
40
13
50
5A
03
FF
01
AF
40
26
00
0E
2D
04
FF
1E
EF
01
00
0E
00
33
05
FF
40
80
01
00
C3
0A
30
06
FF
26
31
BC
00
10
20
4C
07
00
96
40
34
1E
00
20
5A
08
1E
08
31
00
F9
00
20
31
09
6D
B7
59
98
15
1E
20
33
0A
D7
FB
3B
51
20
00
20
0A
0B
3A
A1
D9
00
F8
00
20
20
0C
01
56
45
2A
30
00
00
20
0D
01
48
40
40
58
FD
00
20
0E
01
98
45
10
1F
00
00
00
0F
01
24
59
90
20
38
FC
8F

- 14 -
Symptom Cause Check Point
1) Check the Power switch assy.
2) Check the Power board.
3) If you don’t turn on the Power in stand-by status,
error is the short of Main Board or Tuner Board. Check
the Board.
1) Check the Power part ~ inverter connection cable.
2) Check the inverter on signal.
3) Inverter Error
1) Check the status of Main Board and LCD module
cable.
1) Check the status of Main Board ~Speaker Board
connection cable.
2) Check the TV ~ SPEAKER connection cable.
3) Check the Main Board ~ Tuner Board connection
cable.
1) Check the IC1107/IC1107 error.
2) If IC has speaker-output above 20W , shut down by
itself.
=> Power OFF/ON- Nomal operation
Power supply Error
Inverter power on error
LVDS cable error
Speaker cable error
Sound AMP IC error
1. No picture, No sound
2. No picture, Sound ok
3. Picture ok, No sound
TROUBLESHOOTING
Symptom Cause Check Point
1) Check the PC resolution and support resolution on
spec.
2) Adjust clock and phase of OSD menu.
1)Operation of auto configure on Menu.
1) Check the status of P201 wax-soldering.
2) Check the status of IC201 wax-soldering.
Clock, phase error
Screen position error
D-sub Jack soldering error,IC
1. Screen Noise
2. Screen Position Error
3.Color Beat
Symptom Cause Check Point
1) Check the status of speaker.
2) Check connection of the Main board ~ Tuner board.
3) Check connection of the Main board ~ SPK board.
4) Check IC1102, IC1107, IC1108.
1) Check the status of LVDS cable.
2) Check the wax-soldering status of IC.
IC1102, IC1107, IC1108 error
LVDS cable error
Check IC401, IC501
1. No sound
-Speaker
2. Video color beat noise
1. General features
2. PC mode
3. TV & External input

- 15 -
PRINTED CIRCUIT BOARD
MAIN(TOP)

- 16 -
MAIN(BOTTOM)

- 17 -
SPK(TOP) SPK(BOTTOM)
CONTROL(TOP)
CONTROL(BOTTOM)
E-PHO(BOTTOM)E-PHO(TOP)

- 18 -
TUNER(TOP)
TUNER(BOTTOM)

- 19 -
BLOCK DIAGRAM

- 20 -
EXPLODED VIEW
120
112
430
570
300
350
520
501 540 400
420 410
530
550