LG 55LP1M-WC Service manual
LCD TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : CL-80
MODEL : 55LP1M-WC
website:http://biz.LGservice.com
e-mail:http://www.LGEservice.com/techsup.html
- 2 -
CONTENTS
CONTENTS .............................................................................................. 2
PRODUCT SAFETY ..................................................................................3
SPECIFICATION........................................................................................6
ADJUSTMENT INSTRUCTION................................................................11
SVC REMOCON ......................................................................................15
TROUBLE SHOOTING............................................................................16
BLOCK DIAGRAM...................................................................................22
WIRING DIAGRAM..................................................................................24
EXPLODED VIEW .................................................................................. 25
REPLACEMENT PARTS LIST ............................................................... 27
SVC. SHEET ...............................................................................................
- 3 -
SAFETY PRECAUTIONS
Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by in the
Schematic Diagram and Replacement Parts List.
It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent
X-RADIATION, Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
General Guidance
An isolation 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 as this
protects the technician from accidents resulting in personal injury
from electrical shocks.
It will also protect the receiver and it's components from being
damaged by accidental shorts of the circuitry that may be
inadvertently introduced during the service operation.
If any fuse (or Fusible Resistor) in this TV receiver is blown,
replace it with the specified.
When replacing a high wattage resistor (Oxide Metal Film Resistor,
over 1W), keep the resistor 10mm away from PCB.
Keep wires away from high voltage or high temperature parts.
X-RAY Radiation
Warning:
To determine the presence of high voltage, use an accurate high
impedance HV meter.
Adjust brightness, color, contrast controls to minimum.
Measure the high voltage.
The meter reading should indicate
23.5
1.5KV: 14-19 inch, 26 1.5KV: 19-21 inch,
29.0
1.5KV: 25-29 inch, 30.0 1.5KV: 32 inch
If the meter indication is out of tolerance, immediate service and
correction is required to prevent the possibility of premature
component failure.
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 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 1MΩ and 5.2MΩ.
When the exposed metal has no return path to the chassis the
reading must be infinite.
An other abnormality exists that must be corrected before the
receiver is returned to the customer.
Leakage Current Hot Check (See below Figure)
Plug the AC cord directly into the AC outlet.
Do not use a line Isolation Transformer during this check.
Connect 1.5K/10watt resistor in parallel with a 0.15uF capacitor
between a known good earth ground (Water Pipe, Conduit, etc.)
and the exposed metallic parts.
Measure the AC voltage across the resistor using AC voltmeter
with 1000 ohms/volt or more sensitivity.
Reverse plug the AC cord into the AC outlet and repeat AC voltage
measurements for each exposed metallic part. Any voltage
measured must not exceed 0.75 volt RMS which is corresponds to
0.5mA.
In case any measurement is out of the limits specified, there is
possibility of shock hazard and the set must be checked and
repaired before it is returned to the customer.
Leakage Current Hot Check circuit
The source of X-RAY RADIATION in this TV receiver is the High
Voltage Section and the LCD PANEL.
For continued X-RAY RADIATION protection, the replacement
panel must be the same type panel as specified in the
Replacement Parts List.
IMPORTANT SAFETY NOTICE
0.15uF
To Instrument's
exposed
METALLIC PARTS
AC Volt-meter
1.5 Kohm/10W
Good Earth Ground
such as WATER PIPE,
CONDUIT etc.
- 4 -
CAUTION: Before servicing receivers covered by this service
manual and its supplements and addenda, read and follow the
SAFETY PRECAUTIONS on page 3 of this publication.
NOTE: If unforeseen circumstances create conflict between the
following servicing precautions and any of the safety precautions on
page 3 of this publication, always follow the safety precautions.
Remember: Safety First.
General Servicing Precautions
1. Always unplug the receiver AC power cord from the AC power
source before;
a. Removing or reinstalling any component, circuit board
module or any other receiver assembly.
b. Disconnecting or reconnecting any receiver electrical plug or
other electrical connection.
c. Connecting a test substitute in parallel with an electrolytic
capacitor in the receiver.
CAUTION: A wrong part substitution or incorrect polarity
installation of electrolytic capacitors may result in an
explosion hazard.
2. Test high voltage only by measuring it with an appropriate high
voltage meter or other voltage measuring device (DVM,
FETVOM, etc) equipped with a suitable high voltage probe.
Do not test high voltage by "drawing an arc".
3. Do not spray chemicals on or near this receiver or any of its
assemblies.
4. Unless specified otherwise in this service manual, clean
electrical contacts only by applying the following mixture to the
contacts with a pipe cleaner, cotton-tipped stick or comparable
non-abrasive applicator; 10% (by volume) Acetone and 90% (by
volume) isopropyl alcohol (90%-99% strength)
CAUTION: This is a flammable mixture.
Unless specified otherwise in this service manual, lubrication of
contacts in not required.
5. Do not defeat any plug/socket B+ voltage interlocks with which
receivers covered by this service manual might be equipped.
6. Do not apply AC power to this instrument and/or any of its
electrical assemblies unless all solid-state device heat sinks are
correctly installed.
7. Always connect the test receiver ground lead to the receiver
chassis ground before connecting the test receiver positive
lead.
Always remove the test receiver ground lead last.
8. Use with this receiver only the test fixtures specified in this
service manual.
CAUTION: Do not connect the test fixture ground strap to any
heat sink in this receiver.
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 by static electricity.
1. Immediately before handling any semiconductor component or
semiconductor-equipped assembly, drain off any electrostatic
charge on your body by touching a known earth ground.
Alternatively, obtain and wear a commercially available
discharging wrist strap device, which should be removed to
prevent 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 type 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 charges 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 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.)
General Soldering Guidelines
1. Use a grounded-tip, low-wattage soldering iron and appropriate
tip size and shape that will maintain tip temperature within the
range or 500
o
F to 600oF.
2. Use an appropriate gauge of RMA resin-core solder composed
of 60 parts tin/40 parts lead.
3. Keep the soldering iron tip clean and well tinned.
4. Thoroughly clean the surfaces to be soldered. Use a mall wirebristle (0.5 inch, or 1.25cm) brush with a metal handle.
Do not use freon-propelled spray-on cleaners.
5. Use the following unsoldering technique
a. Allow the soldering iron tip to reach normal temperature.
(500
o
F to 600oF)
b. Heat the component lead until the solder melts.
c. Quickly draw the melted solder with an anti-static, suction-
type solder removal device or with solder braid.
CAUTION: Work quickly to avoid overheating the
circuitboard printed foil.
6. Use the following soldering technique.
a. Allow the soldering iron tip to reach a normal temperature
(500
o
F to 600oF)
b. First, hold the soldering iron tip and solder the strand against
the component lead until the solder melts.
c. Quickly move the soldering iron tip to the junction of the
component lead and the printed circuit foil, and hold it there
only until the solder flows onto and around both the
component lead and the foil.
CAUTION: Work quickly to avoid overheating the circuit
board printed foil.
d. Closely inspect the solder area and remove any excess or
splashed solder with a small wire-bristle brush.
SERVICING PRECAUTIONS
- 5 -
IC Remove/Replacement
Some chassis circuit boards have slotted holes (oblong) through
which the IC leads are inserted and then bent flat against the
circuit foil. When holes are the slotted type, the following technique
should be used to remove and replace the IC. When working with
boards using the familiar round hole, use the standard technique
as outlined in paragraphs 5 and 6 above.
Removal
1. Desolder and straighten each IC lead in one operation by gently
prying up on the lead with the soldering iron tip as the solder
melts.
2. Draw away the melted solder with an anti-static suction-type
solder removal device (or with solder braid) before removing the
IC.
Replacement
1. Carefully insert the replacement IC in the circuit board.
2. Carefully bend each IC lead against the circuit foil pad and
solder it.
3. Clean the soldered areas with a small wire-bristle brush.
(It is not necessary to reapply acrylic coating to the areas).
"Small-Signal" Discrete Transistor
Removal/Replacement
1. Remove the defective transistor by clipping its leads as close as
possible to the component body.
2. Bend into a "U" shape the end of each of three leads remaining
on the circuit board.
3. Bend into a "U" shape the replacement transistor leads.
4. Connect the replacement transistor leads to the corresponding
leads extending from the circuit board and crimp the "U" with
long nose pliers to insure metal to metal contact then solder
each connection.
Power Output, Transistor Device
Removal/Replacement
1. Heat and remove all solder from around the transistor leads.
2. Remove the heat sink mounting screw (if so equipped).
3. Carefully remove the transistor from the heat sink of the circuit
board.
4. Insert new transistor in the circuit board.
5. Solder each transistor lead, and clip off excess lead.
6. Replace heat sink.
Diode Removal/Replacement
1. Remove defective diode by clipping its leads as close as
possible to diode body.
2. Bend the two remaining leads perpendicular y to the circuit
board.
3. Observing diode polarity, wrap each lead of the new diode
around the corresponding lead on the circuit board.
4. Securely crimp each connection and solder it.
5. Inspect (on the circuit board copper side) the solder joints of
the two "original" leads. If they are not shiny, reheat them and if
necessary, apply additional solder.
Fuse and Conventional Resistor
Removal/Replacement
1. Clip each fuse or resistor lead at top of the circuit board hollow
stake.
2. Securely crimp the leads of replacement component around
notch at stake top.
3. Solder the connections.
CAUTION: Maintain original spacing between the replaced
component and adjacent components and the circuit board to
prevent excessive component temperatures.
Circuit Board Foil Repair
Excessive heat applied to the copper foil of any printed circuit
board will weaken the adhesive that bonds the foil to the circuit
board causing the foil to separate from or "lift-off" the board. The
following guidelines and procedures should be followed whenever
this condition is encountered.
At IC Connections
To repair a defective copper pattern at IC connections use the
following procedure to install a jumper wire on the copper pattern
side of the circuit board. (Use this technique only on IC
connections).
1. Carefully remove the damaged copper pattern with a sharp
knife. (Remove only as much copper as absolutely necessary).
2. carefully scratch away the solder resist and acrylic coating (if
used) from the end of the remaining copper pattern.
3. Bend a small "U" in one end of a small gauge jumper wire and
carefully crimp it around the IC pin. Solder the IC connection.
4. Route the jumper wire along the path of the out-away copper
pattern and let it overlap the previously scraped end of the good
copper pattern. Solder the overlapped area and clip off any
excess jumper wire.
At Other Connections
Use the following technique to repair the defective copper pattern
at connections other than IC Pins. This technique involves the
installation of a jumper wire on the component side of the circuit
board.
1. Remove the defective copper pattern with a sharp knife.
Remove at least 1/4 inch of copper, to ensure that a hazardous
condition will not exist if the jumper wire opens.
2. Trace along the copper pattern from both sides of the pattern
break and locate the nearest component that is directly
connected to the affected copper pattern.
3. Connect insulated 20-gauge jumper wire from the lead of the
nearest component on one side of the pattern break to the lead
of the nearest component on the other side.
Carefully crimp and solder the connections.
CAUTION: Be sure the insulated jumper wire is dressed so the
it does not touch components or sharp edges.
- 6 -
1. Application range
This specification is applied to CL-80 chassis.
2. Requirement for Test
Testing for standard of each part must be followed in below
condition.
(1) Temperature: 25°C ± 2°C
(2) Humidity: 65% ± 10%
(3) Power: Standard input voltage (AC 100-240V, 50/60Hz)
(4) Measurement must be performed after heat-run more than
30min.
(5) Adjusting standard for this chassis is followed a special
standard.
SPECIFICATION
NOTE : Specifications and others are subject to change without notice for improvement
.
3.General Specification
4. Mechanical specification
No. Item Content Remark
1 LCD Module Feature Maker LPL
Type TFT Color LCD Module
Active Display Area 54.64 inches(1387.86) duaginal
Pixel Pitch [mm] 630mm(H) x 0.630mm(V) x RGB
Electrical Interface LVDS
Color Depth 8bits, 16,777,216 color P/No.
Size[mm] 1264(H) x 738.4(V) x 49.8(D)
6304FLP205A
Surface Treatment Anti-Glare, Hard Coating (3H)
(LC550W01-A5K1)
Operating Mode Normally Black
Black Light Unit 28CCFL(28 lamps)
R/T Typ. 20ms(R.T : 10ms + F.T. : 10ms)
No. Item Content Remark
1 Product Width(W) Length(D) Height(H)
Dimension Before Packing 1612 320 943.2
After Packing 1740 430 1115
2 Product Only Set 75.2kg
Weight With Box 85kg
- 7 -
5. Engineering Specification
No. Item Content Remark
1. Supported Sync Type Separate Sync, SOG, Composite Sync, Digital
2 Operating Frequency Analog Horizontal 30 ~83 KHz
Vertical 56 ~85 Hz
Digital Horizontal 30 ~83 KHz
Vertical 56 ~85 Hz
3 Resolution Analog Max 1920 x 1080 @60Hz
Recommend 1920 x 1080 @60Hz
Digital Max 1920 x 1080 @60Hz
Recommend 1920 x 1080 @60Hz
4 Input Voltage Voltage : 100 ~ 240Vac , 50 or 60Hz
5 Inrush Current Cold : 40A , Hot : 40A
6 Operating Condition Sync (H/V) Video LED Wattage
Normal Mode Normal (Typ) On/On Active Green 315W
Without Stand
Sleep Mode Stand by Off/On Off Amber ≤ 4W
(Set = On) Suspend On/Off Off Amber ≤ 4W
(Signal=O) DPMS Off Off/Off Off Amber ≤ 4W
Deep Sleep Mode Power Off Off/Off Off Off ≤ 2W
(Set = Off)
7 MTBF 50,000 HRS with 90% Lamp Life :
Confidence level 50,000 Hours (min)
8 Using Altitude 5,000 m (for Reliability) 3,000 m (for FOS)
9 Environment Operating Temperature 5°C ~ 35°C
Condition Humidity 10% ~ 80%
Storage Temperature -20°C ~ 60°C non condensing
Humidity 5% ~ 95% non-condensing
10 Pin D-Sub input 1 : Red Video 9 : E-DDC
2 : Green Video 10 : Sync. GND
3 : Blue Video 11 : Open
4 : Open 12 : SDA
5 : Return 13 : Horizontal Sync.
6 : Red GND 14 : Vertical Sync.
7 : Green GND 15 : SCL
8 : Blue GND Shell : GND
D-Sub Output 1 : Red Video 9 : Open
2 : Green Video 10 : Sync. GND
3 : Blue Video 11 : Open
4 : Open 12 : Open
5 : Open 13 : Horizontal Sync.
6 : Red GND 14 : Vertical Sync.
7 : Green GND 15 : Open
8 : Blue GND Shell : GND
DVI 1 : TMDS Data 2 - 13 : TMDS Data 3 +
2 : TMDS Data 2 + 14 : + 5V Power
3 : TMDS Data 2/4 Shield 15 : Ground (For +5V)
4 : TMDS Data 4 - 16 : Hot Plug Detect
5 : TMDS Data 4 + 17 : TMDS Data 0 -
6 : DDC Clock 18 : TMDS Data 0 +
7 : DDC Data 19 : TMDS Data 0/5 Shield
8 : Analog Vertical Sync 20 : TMDS Data 5 -
9 : TMDS Data 1 - 21 : TMDS Data 5 +
10 : TMDS Data 1 + 22 : TMDS Clock Shield
11 : TMDS Data 1/3 Shield 23 : TMDS Clock +
12 : TMDS Data 3 - 24 : TMDS Clock +
AV In/Out 1: Composite Video
2: Audio L In
3: Audio R In
HDTV(Y,PB,PR) 1: Y
/DVD(Y,CB,CR) 2: Pb (Cb)
3:Pr (Cr)
S-VIDEO 1: GND 3: Y
2: GND 4 : C
RS232C IN 1. NC 2. Rx
3. Tx 4. NC
5. NC 6. GND
7. NC 8. GND
9. NC
RS232C OUT 1. NC 2. Rx
3. Tx 4. NC
5. NC 6. GND
7. NC 8. NC
9. NC
- 8 -
1) PC Mode
MODE
H / V
Sync
Polarity
Frequency
Total
Period
( E )
Video
Active
Time ( A )
Front
Porch
( C )
Sync
Duration
( D )
Back
Porch
( F )
Resolution
Dot
Clock
1 H(Pixels) + 25.175 31.469 800 640 16 96 48 640 x 350
V(Lines) - 70.8 449 350 37 2 60
2 H(Pixels) - 28.321 31.468 900 720 18 108 54 720 X 400
V(Lines) + 70.8 449 400 12 2 35
3 H(Pixels) - 25.175 31.469 800 640 16 96 48 640 x 480
V(Lines) - 59.94 525 480 10 2 33
4 H(Pixels) - 31.5 37.5 840 640 16 64 120 640 x 480
V(Lines) - 75 500 480 1 3 16
5 H(Pixels) - 36.0 43.269 832 640 56 56 80 640 x 480
V(Lines) - 85.0 509 480 1 3 25
6 H(Pixels) + 40.0 37.879 1056 800 40 128 88 800 x 600
V(Lines) + 60.317 628 600 1 4 23
7 H(Pixels) + 49.5 46.875 1056 800 16 80 160 800 x 600
V(Lines) + 75.0 625 600 1 3 21
8 H(Pixels) + 56.25 53.674 1048 800 32 64 152 800 x 600
V(Lines) + 85.061 631 600 1 3 27
9 H(Pixels) +/- 57.283 49.725 1152 832 32 64 224 832 x 624
V(Lines) +/- 74.55 667 624 1 3 39
10 H(Pixels) - 65.0 48.363 1344 1024 24 136 160 1024 x 768
V(Lines) - 60.0 806 768 3 6 29
11 H(Pixels) - 78.75 60.123 1312 1024 16 96 176 1024 x 768
V(Lines) - 75.029 800 768 1 3 28
12 H(Pixels) + 94.5 68.68 1376 1024 48 96 208 1024 x 768
V(Lines) + 85.00 808 768 1 3 36
13 H(Pixels) + 74.5 44.772 1664 1280 64 128 192 1280 x 720
V(Lines) + 59.855 748 720 3 5 20
14 H(Pixels) + 84.75 47.72 1776 1360 72 136 208 1360 x 768
V(Lines) + 59.799 798 768 3 5 22
15 H(Pixels) + 108.0 63.981 1688 1280 48 112 248 1280 x 1024
V(Lines) + 60.02 1066 1024 1 3 38
16 H(Pixels) + 135.00 79.98 1688 1280 16 144 248 1280 x 1024
V(Lines) + 75.02 1066 1024 1 3 38
17 H(Pixels) + 138.5 66.587 2080 1920 48 32 80 1980 x 1080
V(Lines) - 60 1111 1080 3 5 23
6. Signal Timing(Resolution)
2) DTV Mode
Component Video Input (Y/Pb/Pr)
MODE
H / V
Sync
Polarity
Frequency
Total
Period
( E )
Video
Active
Time ( A )
Front
Porch
( C )
Sync
Duration
( D )
Back
Porch
( F )
Resolution
Dot
Clock
1 H(Pixels) - 25.175 31.469 800 640 16 96 48 SDTV
V(Lines) - 59.94 525 480 10 2 33 480P
2 H(Pixels) - 27.027 31.5 858 720 16 62 60 HDTV
V(Lines) - 60 525 480 10 2 33 720P (HDCP)
3 H(Pixels) - 74.176 44.955 1650 1280 70 40 260 HDTV
V(Lines) - 59.94 750 720 5 5 60 720P (HDCP)
4 H(Pixels) - 74.250 33.750 2200 1920 44 44 192 HDTV
V(Lines) - 60.053 562 540 2 5 15 1080I (HDCP)
5 H(Pixels) - 74.176 33.716 2200 1920 44 44 192 HTDV
V(Lines) - 59.994 562 540 2 5 15 1080I (HDCP)
- 9 -
7. Special Function
No. Contents Description Remark
1 Audio Output Output 10W + 10W Volume :Adjust
AMP Rating (Rated Out put ± 10%)
Freq. Character 100Hz ~ 10KHz Range ( -3 dB )
T.H.D Within 10%
Input Sensitivity 0.700Vrms
S/N Less then 40dB
2 Speaker Type Built-In
Impedance 8
Input Max : 15W, Normal : 10W
3 AV Video Level Input : 0.7±0.15 V p-p 75
Terminal Resistor
Sync Level nput : 0.286±0.075 V p-p 75
Terminal Resistor
Color Burst Input : 0.214±0.072 V p-p 75
Terminal Resistor
Audio Level NTSC Input : 0.40±0.1 V rms 600
PAL Input: 0.5±0.1
PC Input : 0.7±0.1
Video Cross Talk 43 dB
- 10 -
8. Optical Character
No Item Criteria Remark
1 Viewing Angle Horizontal(R/L) : +85
°/-85° (min.), 88°/-88° (Typ.)
<CR
≥
10> Vertical(Top/Bottom) : +85
°/-85° (min.), 88°/-88°(Typ.)
2 Luminance Luminance (cd/m2) 400 cd/m2 (min.) 500cd/m2 (Typ) 9300K
Variation 1.33
3 Contrast Ratio Without AI :400(min.),550(Typ.), With AI:800 (min),1200(Typ)
4 CIE Color Coordinates Minimum Typ Maximum
White WX 0.372 0.402 0.432 3600K
WY 0.364 0.394 0.424
White WX 0.283 0.313 0.343 6500K
WY 0.299 0.329 0.359
White Wx 0.254 0.284 0.314 9300K
Wy 0.265 0.295 0.325
Red RX 0.610 0.640 0.670
RY 0.312 0.342 0.372
Green GX 0.255 0.285 0.315
GY 0.577 0.607 0.637
Blue BX 0.117 0.147 0.177
BY 0.035 0.065 0.095
5 Grey Level Gray Level Typ.
Relative Brightness Without AI Without AI
L0 0.17 0.17
L15 0.55 0.55
L31 0.94 0.94
L47 2.20 2.20
L63 4.21 4.21
L79 7.39 7.39
L95 11.58 11.58
L111 16.57 16.57
L127 22.36 22.36
L143 30.14 30.14
L159 39.72 39.72
L175 50.50 50.50
L191 61.48 61.48
L207 73.25 73.25
L223 84.63 84.63
L239 94.01 94.01
L255 100.0 100.0
6 Light Leakage Condition: Do not visible at 300 Lux
- 11 -
1. Coverage
Apply to monitor that is made or do standard here upon and
manufacture in monitor factory this standard.
2. Appointment
2.1 Adjustment can must follow, and confer with design part
and change order in order designated.
2.2 Power : Free Voltage
2.3 Input signal : based engineering specification
2.4 pre operating : over 30 min
2.5 Adjust equipment : White balance equipment (CA-110/CA-
210), Display adjust equipment (VG-828 or VG848)
Oscilloscope, PC (Pentium level) , TV/AV Pattern
Generator & 55" LCD TV.
HDCP Adjusting Jig equipment.
3. Adjustment
3.1 Overview
Use factory automation equipment and adjust automatic
movement. But, do through handwork adjust in error
occurrence.
3.2 Adjustment order
3.2.1 Adjustment Line process
ENTER SERVICE ADJUSTMENT MENU.
Connect input signal to 15pin D-sub.
Adjust ready : Adjust command normally action existence
and nonexistence and mode action state.
Checking.
Confirm that normally gray color is embodied inputing 256
gray scale patterns.
3.2.2 Total Assembly Line
Ready : Heat-run during 120 minutes in state with signal.
Connect input signal to 15pin D-sub.
Before adjust default value : Contrast Outgoing
condition, Brightness Outgoing condition
3.2.3 Each mode horizontal/Verticality screen position,
Clock, Clock Phase Adjustment.
There is no special factory mode adjust.
When power ON u-com is default data wright at the
adjustment line.
#Caution) That keep power-on more than 10 seconds
after power-on first time
EEPROM contents read to compare at the adjustment
line.
3.2.4 Color coordinates adjustment and Luminance
adjustment. (input D-sub Analog )
3.2.4.1 Color coordinates adjust ready.
When each color coordinates & Black level adjust.
Contrast : outgoing condition
Brightness : outgoing condition
Signal Generator
Output Voltage : 700 mVp-p
Output Mode : #13 ( WXGA 60 Hz) mode Setting.
Before adjustment command "start preset
adjustment" next start adjustment
3.2.4.2 Black level adjustment (Bias Adjustment.)
Input black pattern none SOG signal.
Input command AUTO_COLOR_ADJUST(0xF1),
0x00 after adjustment.
After wait about 2 second, confirm the massage
"ok",confirm 0xAA the address 0x00 of EEPROM
0xA0 again adjust.(because auto adjustment fail)
3.2.4.3 PRESET 1 (9300 K) Color coordinates adjustment
and confirmation (Gain Adjustment)
Input full white pattern none SOG signal.
Input command AUTO_COLOR_ADJUST(0xF1),
0x01after adjustment.
After wait about 3 second, confirm the massage "ok",
and, confirm 0xAA the address 0x01 of EEPROM
0xA0.
f display the massage "FAIL" or not 0xAA the
address 0x01 of EEPROM 0xA0 again adjust.
(because auto adjustment fail)
3.2.4.4 PRESET 2 (6500 K) Color coordinates adjustment
and confirmation
The input is Full White Pattern
None adjustment process.
It sends an instruction The AUTO_MODE_CHANGE
(0xF2), 0x02
Auto stored 6500K R = 9300K R, 6500K G = 9500K
G - 10, 6500K B = 9300K B- 40.
Confirm x= 0.313±0.030, y=0.329±0.030
ADJUSTMENT INSTRUCTION
3.2.5 Color coordinates Adjustment and brightness
Adjustment (AV input)
3.2.5.1 Color coordinates adjustment provisions:
Adjusting Each color coordinate and Black level
EZ Video : Standard
ACC : Normal
Input signal :
Adjust after input signal of PAL MODE l ,because
major sales area is EU.
PAL:CVBS(576i), 576i (HDTV port), 1080i / 60Hz
(HDTV port ) it Adjusts 3 Modes.
Before Adjustment It shows a "PRESET
ADJUSTMENT START" message. And adjustment
begins.
3.2.5.2 Black level adjustment (Bias adjustment) :
The input is 1080i/60Hz signal in Component input
and 16/255 Gray Level.
Brightness Range 0.9~1.1 cd/m2, In the Sub Bright
(0x86) In order to hold the variable brightness.
*Reference : With CVBS input & COMPONENT INPUT
576i It is not with from Adjustment. It does default setting
for this value.
3.2.5.3 White Level Adjustment (Gain Adjustment)
The Display is 240/255 Gray Level.
For Adjustment the R Gain is fixed at 100, to adjust
G/B gain , the color coordinates
55LP1M-WC (x = 0.283±0.010, y = 0.298±0.010)
(G Gain is variable ,its range is 0 ~ 100)
Only when the G gain goes over 100 it fixes the G
gain 100 and R/B gain is variable
It makes the color coordinate. (Generally only R gain
Or G gain is fixed to 100)
3.2.5.4 Gray Scale Check
The input can be 3 modes PAL : CVBS(576i) , 576i
(HDTV port), 1080i (HDTV port ).
For each mode 16 GREY pattern is displayed
Check 0 level is not displayed and 1/16 Grey is
displayed.
The 15/16 Gray and 16/16 Gray are checked
separately.
3.2.6 Operation condition check
3.2.6.1 Operational mode: Every mode, which is in
specification, is checked that it is accurate and are
operated.
3.2.6.2 Adjustment condition and operation check:
Satisfactory yes or no adjustment of screen
adjustment standards
Analog/Digital screen condition check: From lower
part mode screen condition good yes or no check
Designation mode : 640x350 (70Hz) - 1 mode,
800x600 (75Hz) - 2 mode,
1024x768(60Hz) -12 mode,
1280x768(60 Hz)-13 mode
The input selection time is 8 seconds after key is
pressed and Analog or Digital display comes on the
screen.
3.2.6.3 H/V Position, Clock, Clock Phase and Auto
Calibration operation check
The Mode 13 (1280*768,60Hz) 1line from on/off
pattern H/V Position and the Clock, Clock Phase it is
variable each and it is checked it operates normally
The Clock, Clock phase are adjusted by auto
calibration when they have become variable. They
are checked.
3.2.6.4 Color operation check: 9300K, 6500, 3600K ,USER
COLOR are checked for normal operation.
It is checked that 9300 and USER COLOR setting
are same.
Other quality : Satisfactory yes or no adjustment
against each item from the standard
condition which is written clearly in the
product specification
(1) Each SOURCE image and Sound check
A/V : supports NTSC, PAL
3.2.6.5 Audio Spec
Speaker: 8ohm
INPUT(PC AUDIO) : 0.7Vrms , OUTPUT : 10W
INPUT(A/V) : 0.4Vrms(NTSC), 0.5Vrms(PAL), OUTPUT : 10W
- 12 -
3.2.6.6 OSD and terminal check. Check clearly,adjustment
follows the product specification.
3.2.6.7 The input is Color bar pattern and 256 Gray scale
pattern and check if normal color is displayed
properly
3.2.6.8 PM operation confirmation: the power LED glow and
voltage power consumption is checked
(When No image signal condition)
3.2.6.9 E-DDC EDID Write
- Analog Part EDID Data store
Connect Analog Signal Cable to D-SUB Jack
Write DDC data 24C02 and check DDC function
operates normally and DDC data is written correctly
(EDID Data product specification reference)
-Stores Digital Part EDID Data
Connect Digital Signal Cable to DVI-D Jack.
Write DDC data 24C02 and check DDC function
operates normally and DDC data is written correctly
(EDID Data product specification reference)
3.2.6.10 HDCP Write
Connect Digital Signal Cable to DVI-D Jack.
Write HDCP data 24C16 and check HDCP function
operates normally and HDCP data is written correctly
3.2.6.11 RS 232C
Connect serial cable to RS232C
Send the instruction " 0x04, 0xaa, 0xff, 0x53"and
check "OK" Message. is display on screen.check
"OK" Message. is display on screen.
CHECK THE SVC Aging On IF CANNOT OPERATE
3.2.6.12 All Reset
All Tests finish when inside service mode. the
"NVRAM INITIAL" makes it ON with Initial Data.
3.2.6.13 LANGUAGE: The default language is ENGLISH as
in the Product Specification
Another language can be set as per Product
Specification.
3.2.6.14 CNN option
1) Enter the Service menu Adjustment.
2) In the Setup MENU select CNN ON/OFF and set up
as. Default is CNN OFF. (Don't need select this
option that is only for CNN)
3.2.6.15 FAN Operation check (ALL Model)
1) Enter the Srrvice Adjustment Menu
2) Select Menu's "FAN" and make by "On".
3) Confirm FAN's operating
3.2.6.16 Temperature (Ambient) confirm (ALL Model)
1) Enter the Service Adjustment Menu.
2) Confirm temperature value.
(This value is ambient temperature of set . If it is
baggage value, set is badness.)
3.2.6.17 Light Sensor value confirm
1) Enter the Service Adjustment Menu.
2) Confirm Light Value's value.
(Can know if cover sensor on hand. In the present
case, sensor value amounts to 0.)
(According to brightness, confirm change of value of
sensor.)
(If sensor value does not change, it is badness.)
- 13 -
Loading...