LG 22MA53D-PZ(R)P, 23MA53D-PZ(R)P, 23MA73D-PZP, 24MA53D-PZ(R)P, 27MA53D-PZ(R)P Service manual & schematics
...
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Internal Use Only
http://aic.lgservice.com http://eic.lgservice.com http://biz.lgservice.com
LED TV SERVICE MANUAL
CHASSIS : LD31Q
MODEL: 23MA73D 23MA73D-PZP 23MA73D-PRP
CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL67580681 (1301-REV00)
Printed in Korea
CONTENTS
| CONTENTS 2 |
|---|
| SAFETY PRECAUTIONS |
| SERVICING PRECAUTIONS 4 |
| SPECIFICATION |
| ADJUSTMENT INSTRUCTION 11 |
| TROUBLE SHOOTING 16 |
| BLOCK DIAGRAM 23 |
| EXPLODED VIEW 24 |
| SCHEMATIC CIRCUIT DIAGRAM |
SAFETY PRECAUTIONS
IMPORTANT SAFETY NOTICE
Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by A in the Schematic Diagram and Exploded View.
It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent 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.
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 1MQ and 5.2MQ.
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
When 25A is impressed between Earth and 2nd Ground for 1 second, Resistance must be less than 0.1 *Base on Adjustment standard
SERVICING PRECAUTIONS
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
-
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.
- 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.
- 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".
- 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.
- 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.
- 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.
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
- 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.
- Use only a grounded-tip soldering iron to solder or unsolder ES devices.
- 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.
- 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).
- 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
- Use a grounded-tip, low-wattage soldering iron and appropriate tip size and shape that will maintain tip temperature within the range or 500 °F to 600 °F.
- 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 °F to 600 °F)
- b. Heat the component lead until the solder melts.
- c. Quickly draw the melted solder with an anti-static, suctiontype solder removal device or with solder braid. CAUTION: Work quickly to avoid overheating the circuit board printed foil
-
6. Use the following soldering technique.
- a. Allow the soldering iron tip to reach a normal temperature (500 °F to 600 °F)
- 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.
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
- 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
- Remove the defective transistor by clipping its leads as close as possible to the component body.
- 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).
- 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.
- Bend the two remaining leads perpendicular y to the circuit board.
- 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.
- 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.
- Securely crimp the leads of replacement component around notch at stake top.
- 3 Solder the connections
Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes
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).
- carefully scratch away the solder resist and acrylic coating (if used) from the end of the remaining copper pattern.
- 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.
- 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.
- 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.
- 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.
SPECIFICATION
NOTE : Specifications and others are subject to change without notice for improvement.
1. Application Range
This spec sheet is applied all of the TV used LD31Q chassis.
2. Specification
Each part is tested as below without special appointment
- 1) Temperature : 25 °C ± 5 °C (77 °F ± 9 °F), CST : 40 °C ± 5 °C
- 2) Relative Humidity : 65 % ± 10 %
- 3) Power Voltage : Standard input voltage (100 V - 240 V ~, 50 / 60 Hz)
Standard Voltage of each products is marked by models
- Specification and performance of each parts are followed each drawing and specification by part number in accordance with BOM.
- 5) The receiver must be operated for about 5 minutes prior to the adjustment.
3.Test method
- 1) Performance : LGE TV test method followed
-
2) Demanded other specification
- Safety : CE,IEC specification
- EMC : CE,IEC specification
4. General specification
| No | Item | Specification | Remarks |
|---|---|---|---|
| 1 | Market | EU/CIS (PAL Market-37 Countries) |
DTV & Analog (Total 37 countries)
DTV (MPEG2/4, DVB-T) :37 countries UK/Italy/Germany/France/Spain/Sweden/Finland/Nether- lands/ Belgium/Luxemburg/ Greece/Denmark/Czech/ Austria /Hungary/Swiss/Croatia/Turkey Norway/Slovenia/Poland/Ukraine/Portugal/Ireland/Morocco/ Latvia/Estonia/Lithania/Rumania/Bulgaria/Russia/Slovakia Bosnia/Serbia/Albania/Kazakhstan/Belarus DTV (MPEG2/4, DVB-T2): 8 countries UK/Denmark/Sweden/Finland/Norway/Ireland/Ukraine/ Kazakhstan DTV (MPEG2/4, DVB-C): 37 countries UK/Italy/Germany/France/Spain/Sweden/Finland/Nether- lands/ Belgium/Luxemburg/ Greece/Denmark/Czech/ Austria /Hungary/Swiss/Croatia/Turkey Norway/Slovenia/Poland/Ukraine/Portugal/Ireland/Morocco/ Latvia/Estonia/Lithania/Rumania/Bulgaria/Russia/Slovakia Bosnia/Serbia/Albania/Kazakhstan/Belarus DTV (MPEG2/4, DVB-S): 29 countries Italy/Germany/France/Spain/Netherlands/ Belgium/ Luxemburg/ Greece/ Czech/Austria /Hungary/Swiss/Croatia/ Turkey/Slovenia/Poland/Portugal/ Morocco/Latvia/ Estonia/Lithania/Rumania/Bulgaria/Russia/Slovakia Bosnia/Serbia/Albania/Kazakhstan/Belarus DTV (MPEG2/4, DVB-S): 29 countries Italy/Germany/France/Spain/Netherlands/ Belgium/ Luxemburg/ Greece/ Czech/Austria /Hungary/Swiss/Croatia/ Turkey/Slovenia/Poland/Portugal/ Morocco/Latvia/ Estonia/Lithuania/Rumania/Bulgaria/Russia/Slovakia Bosnia/Serbia/Albania/ Belarus Supported satellite : 22 satellites HISPASAT 1C/1D, ATLANTIC BIRD 2, NILESAT 101/102, ATLANTIC BIRD 3, AMOS 2/3, THOR 5/6, IRIUS 4, EUTELSAT-W3A, EUROBIRD 9A, EUTELSAT-W2A, HOT- BIRD 6/8/9, EUTELSAT-SESAT, ASTRA 1L/H/M/KR, ASTRA 3A/3B, BADR 4/6, ASTRA 2D, EUROBIRD 3, EUTELSAT-W2A, HOT- BIRD 6/8/9, BUTELSAT-SESAT, ASTRA 1L/H/M/KR, ASTRA 3A/3B, BADR 4/6, ASTRA 2D, EUROBIRD 3, EUTELSAT-W7, HELLASSAT 2, EXPRESS AM1, TURKSAT 2A/3A, INTERSAT10 |
| 2 | Broadcasting system |
1)Analogue TV
1) PAL-BG 2) PAL-DK 3) PAL-I/I' 4) SECAM-BG 5) SECAM-DK 6) SECAM-DK 6) SECAM L/L' Digital TV 1) DVB-T/C/T2 Satellite Digital TV 1) DVB-T/C/S/S2 |
Analogue TV : (RF) VHF: E2 to E12, UHF : E21 to E69
(CATV) S1 to S20, HYPER: S21 to S47 Digital TV : VHF, UHF Satellite TV : VHF, UHF, C-Band, Ku-Band * DVB-T2 ( T2 model only support ) * DVB-S/S2 (Satellite model only support ) |
| No | Item | Specification | Remarks |
|---|---|---|---|
| 3 | Receiving system |
Analog : Upper Heterodyne
Digital : COFDM, QAM |
|
| 4 | Scart Jack (1EA) | PAL, SECAM | Scart Jack is Full scart and support RF-OUT(analog) |
| 5 | Component Input (1EA) | Y/Cb/Cr , Y/Pb/Pr | |
| 6 | CVBS Input (1EA) | PAL, SECAM, NTSC |
4 System(Rear) :PAL, SECAM, NTSC, PAL60
CVBS Video input is used by common port with Component. |
| 7 | RGB Input | RGB-PC | Analog (D-SUB 15Pin) |
| 8 | HDMI Input (2EA) | HDMI1/2 |
Rear / HDMI version 1.4/ support PC
Support HDCP / HDMI2 : MHL Support |
| 9 | Audio Input (3EA) |
RGB/DVI Audio
Component & CVBS SCART |
L/R Input
CVBS Audio input is used by common port with Component. |
| 10 | Headphone out (1EA) |
Antenna, AV1, AV2, Component,
RGB, HDMI1/2 |
Side 1EA |
| 11 | USB (1EA) |
EMF, DivX HD,
For SVC (download) |
JPEG, MP3, DivX HD |
| 12 | DVB | DVB-T |
CI : UK, Finland, Denmark, Norway, Sweden, Russia, Spain,
Ireland, Luxemburg, Belgium, Netherland CI+ : France(Canal+), Italy(DGTVi) |
| DVB-C |
CI : Switzerland, Austria, Slovenia, Hungary, Bulgaria
CI+: Switzerland(UPC,Cablecom), Netherland(Ziggo), Germany(KDG,CWB), Finland(labwise) |
||
| DVB-S | CI + : Germany (Astra HD+) | ||
| 13 | Local Key (Touch) | ~ ^ - + OK SETTINGS INPUT 也/ | |
| 14 | LAN JACK | Modular | 73V(Only UK for MHEG) |
4.2. RGB(PC)
| No | Item | Specif | ication | Remarks | |
|---|---|---|---|---|---|
| 1 | Supported Sync. Type | Separate Sync | ., Digital | ||
| 2 | Operating Frequency | Analog | Horizontal | 30 ~ 83 kHz | |
| Vertical | 56 ~ 75 Hz | ||||
| Digital | Horizontal | 30 ~ 83 kHz | |||
| Vertical | 56 ~ 75 Hz | ||||
| 3 | Resolution | Analog | Max. | 1920x1080 @ 60 Hz | |
| Recommend | 1920x1080 @ 60 Hz | ||||
| Digital | Max. | 1920x1080 @ 60 Hz | |||
| Recommend | 1920x1080 @ 60 Hz | ||||
| 4 | Operating Environment |
Temp : 10°C ~
Humidity : 20 9 |
35°C
% ~ 80 % |
||
| 5 | Storage Environment |
Temp : -10°C ~
Humidity : 5 % |
|
5. Timing 5.1. RGB/ HDMI (PC)
| No. | Resolution | H-freq(kHz) | V-freq(Hz) | Pixel clock(MHz) | Remark |
|---|---|---|---|---|---|
| 1 | 720*400 | 31.468 | 70.080 | 28.321 | |
| 2 | 640*480 | 31.469 | 59.940 | 25.175 | |
| 3 | 640*480 | 37.500 | 75.000 | 31.500 | |
| 4 | 800*600 | 37.879 | 60.317 | 40.000 | |
| 5 | 800*600 | 46.875 | 75.000 | 49.500 | |
| 6 | 1024*768 | 48.363 | 60.004 | 65.000 | |
| 7 | 1024*768 | 56.476 | 70.069 | 75.000 | HDMI(PC) only |
| 8 | 1024*768 | 60.023 | 75.029 | 78.750 | |
| 9 | 1152*864 | 67.500 | 75.000 | 108.000 | |
| 10 | 1280*720 | 45.000 | 60.000 | 74.250 | |
| 11 | 1280*800 | 49.702 | 59.810 | 83.500 | |
| 12 | 1280*1024 | 63.981 | 60.020 | 108.000 | |
| 13 | 1280*1024 | 79.976 | 75.025 | 135.000 | |
| 14 | 1400*1050 | 65.317 | 59.978 | 121.750 | |
| 15 | 1440*900 | 55.935 | 59.887 | 106.500 | |
| 16 | 1600*900 | 60.000 | 60.000 | 108.000 | |
| 17 | 1680*1050 | 64.674 | 59.883 | 119.000 | |
| 18 | 1680*1050 | 65.290 | 59.954 | 146.250 | |
| 19 | 1920*1080 | 67.500 | 60.000 | 148.500 |
5.2. HDMI (DTV)
| No. | Resolution | H-freq(kHz) | V-freq(Hz) | Pixel clock(MHz) | Remark |
|---|---|---|---|---|---|
| 1 | 720* 480 | 31.469 / 31.5 | 59.94 / 60 | 27.00/ 27.03 | SDTV 480P |
| 2. | 720*576 | 31.25 | 50.00 | 27.864 | SDTV 576P |
| 3. | 1280*720 | 37.50 | 50.00 | 74.250 | HDTV 720P |
| 4 | 1280* 720 | 44.96 / 45 | 59.94 / 60 | 74.17/ 74.25 | HDTV 720P |
| 5 | 1920* 1080 | 33.72 / 33.75 | 59.94 / 60 | 74.17/ 74.25 | HDTV 1080I |
| 6 | 1920* 1080 | 28.125 | 50.00 | 74.25 | HDTV 1080I |
| 7 | 1920* 1080 | 27.00 | 24 | 74.25 | HDTV 1080P |
| 8 | 1920* 1080 | 33.75 | 30.00 | 74.25 | HDTV 1080P |
| 9 | 1920* 1080 | 56.250 | 50 | 148.5 | HDTV 1080P |
| 10 | 1920* 1080 | 67.43 / 67.5 | 59.94 / 60 | 148.35/ 148.50 | HDTV 1080P |
5.3. Component
| No | Pomark | ||||
|---|---|---|---|---|---|
| INU | Resolution | H-freq(kHz) | V-freq(Hz) Pixel clock( MHz) | Reliaik | |
| 1. | 720* 480 | 15.73 | 59.94 | 13.500 | SDTV, DVD 480I( 525I) |
| 2. | 720* 480 | 15.75 | 60.00 | 13.514 | SDTV, DVD 480I( 525I) |
| 3. | 720* 576 | 15.625 | 50.00 | 13.500 | SDTV, DVD 576I( 625I) 50Hz |
| 4. | 720* 480 | 31.47 | 59.94 | 27.000 | SDTV 480P |
| 5. | 720* 480 | 31.50 | 60.00 | 27.027 | SDTV 480P |
| 6. | 720* 576 | 31.25 | 50.00 | 27.000 | SDTV 576P 50Hz |
| 7. | 1280* 720 | 44.96 | 59.94 | 74.176 | HDTV 720P |
| 8. | 1280* 720 | 45.00 | 60.00 | 74.250 | HDTV 720P |
| 9. | 1280* 720 | 37.50 | 50.00 | 74.25 | HDTV 720P 50Hz |
| 10. | 1920* 1080 | 33.72 | 59.94 | 74.176 | HDTV 1080I |
| 11. | 1920* 1080 | 33.75 | 60.00 | 74.250 | HDTV 1080I |
| 12. | 1920* 1080 | 28.125 | 50.00 | 74.250 | HDTV 1080I 50Hz |
| 13. | 1920* 1080 | 56.25 | 50 | 148.5 | HDTV 1080P |
| 14. | 1920* 1080 | 67.432 | 59.94 | 148.350 | HDTV 1080P |
| 15. | 1920* 1080 | 67.5 | 60.00 | 148.5 | HDTV 1080P |
ADJUSTMENT INSTRUCTION
1. Application Range
This document is applied to LD31Q chassis TV which is manufactured in TV (or Monitor) Factory or is produced on the basis of this data.
2. Designation
- The adjustment is according to the order which is designated and which must be followed, according to the plan which can be changed only on agreeing.
- 2) Power adjustment : Free Voltage.
- 3) Magnetic Field Condition: Nil.
- 4) Input signal Unit: Product Specification Standard.
- 5) Reserve after operation: Above 5 Minutes (Heat Run) Temperature : at 25 °C ± 5 °C
Relative humidity : 65 % ± 10 % Input voltage : 220 V, 60 Hz
6) Adjustment equipments : Color Analyzer (CA-210 or CA-110), DDC Adjustment Jig equipment, SVC remote control-
7) Push The "IN STOP KEY" – For memory initialization
Case1 : Software version up
- 1) After downloading S/W by USB , Multi-vision set will reboot automatically
- 2) Push "In-stop" key
- 3) Push "Power on" key
- 4) Function inspection
- 5) After function inspection, Push "In-stop" key.
Case2 : Function check at the assembly line
- When TV set is entering on the assembly line, Push "Instop" key at first.
- 2) Push "Power on" key for turning it on.
- → If you push "Power on" key, TV set will recover channel information by itself.
- 3) After function inspection, Push "In-stop" key.
3. Main PCB check process
* APC - After Manual-Insult, executing APC
* Boot file Download
- 1) Execute ISP program "Mstar ISP Utility" and then click "Config" tab.
- Set as below, and then click "Auto Detect" and check "OK" message. If display "Error", Check connect computer, jig, and set.
- Click "Connect" tab. If display "Can't ", Check connect computer, jig, and set.
Click "Read" tab, and then load download file(XXXX.bin) by clicking "Read"
5) Click "Auto" tab and set as below
6) Click "Run".
7) After downloading, check "OK" message
* USB DOWNLOAD(*.epk file download)
- 1) Make New folder named "LG_DTV" and put ISP file(*.epk) in the folder.
- 2) Put the USB Stick to the USB socket.
-
3) Automatically detecting update file in USB Stick
- If your downloaded program version in USB Stick is Low, it didn't work. But your downloaded version is High, USB data is automatically detecting.
- 4) Show the message "Copy the file from the Memory..."
5) Updating is starting.
6) Updating Completed, The TV will restart automatically.
-
7) If your TV is turned on, check your updated version and Tool option. (explain the Tool option, next stage)
- * If downloading version is more high than your TV have, TV can lost all channel data. In this case, you have to channel recover. if all channel data is cleared, you didn't have a DTV/ATV test on production line.
3.1 EDID Process
3.1.1. EDID download
- 1) Press "Power only" key of service remote control. 2) Press the ADJ KEY on R/C and enter F7 ADJUST
- 3) Enter EDID D/L mode by pushing "▶" key at "EDID D/L".
- 4) EDID download is executed automatically 5) Press EXIT key on R/C.
→ Caution: - Never connect HDMI & D-sub Cable when download EDID.
- Download HDMI1_HDMI2 separately because HDMI1 is different from HDMI2.
* Edid data and Model option download (USB)
| NO | Item |
CMD
1 |
CMD
2 |
Dat | ta O | |
|---|---|---|---|---|---|---|
|
Enter
download MODE |
Download
'Mode In' |
A | A | 0 | 0 |
When transfer the
'Mode In', Carry the command. |
|
EDID data and
Model option download |
Download | A | E | 00 | 10 |
Automatically download
(The use of a internal Data) |
3.1.2. RGB EDID Data
2D FHD (Check Sum : C1) 50 54 A5 6B 02
*(week) **(vear) ***(Check sum) : Adjustable Data
3.1.3. HDMI EDID Data
| 1) HDMI1 (2D FHD - Check Sum: 15CE) | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0x00 | 0x01 | 0x02 | 0x03 | 0x04 | 0x05 | 0x06 | 0x07 | 0x08 | 0x09 | 0x0A | 0x0B | 0x0C | 0x0D | 0x0E | 0x0F | |
| 0x00 | 00 | FF | FF | FF | FF | FF | FF | 00 | 1E | 6D | C6 | 59 | 01 | 01 | 01 | 01 |
| 0x01 | 01 | 17 | 01 | 03 | 80 | 33 | 1D | 78 | EA | 62 | 75 | A3 | 55 | 4F | A0 | 27 |
| 0x02 | 12 | 50 | 54 | A5 | 6F | 00 | 71 | 4F | 81 | CO | 81 | 00 | 81 | 80 | 95 | 00 |
| 0x03 | 90 | 40 | A9 | CO | B3 | 00 | 02 | 3A | 80 | 18 | 71 | 38 | 2D | 40 | 58 | 2C |
| 0x04 | 45 | 00 | FD | 1E | 11 | 00 | 00 | 1A | 21 | 39 | 90 | 30 | 62 | 1A | 27 | 40 |
| 0x05 | 68 | B0 | 36 | 00 | FD | 1E | 11 | 00 | 00 | 1C | 00 | 00 | 00 | FD | 00 | 38 |
| 0x06 | 4B | 1E | 53 | 0F | 00 | 0A | 20 | 20 | 20 | 20 | 20 | 20 | 00 | 00 | 00 | FC |
| 0x07 | 00 | 32 | 44 | 20 | 46 | 48 | 44 | 20 | 4C | 47 | 20 | 54 | 56 | 0A | 01 | 15 |
| 0x00 | 0x01 | 0x02 | 0x03 | 0x04 | 0x05 | 0x06 | 0x07 | 0x08 | 0x09 | 0x0A | 0x0B | 0x0C | 0x0D | 0x0E | 0x0F | |
| 0x00 | 02 | 03 | 21 | F1 | 4E | 84 | 05 | 03 | 02 | 20 | 22 | 10 | 11 | 13 | 12 | 14 |
| 0x01 | 1F | 07 | 16 | 26 | 15 | 07 | 50 | 09 | 07 | 07 | 66 | 03 | 0C | 00 | 10 | 00 |
| 0x02 | 80 | 01 | 1D | 00 | 72 | 51 | D0 | 1E | 20 | 38 | 88 | 15 | 00 | 56 | 50 | 21 |
| 0x03 | 00 | 00 | 1E | 01 | 1D | 80 | 18 | 71 | 1C | 16 | 20 | 58 | 2C | 25 | 00 | 56 |
| 0x04 | 50 | 21 | 00 | 00 | 9E | 01 | 1D | 80 | D0 | 72 | 1C | 16 | 20 | 10 | 2C | 25 |
| 0x05 | 80 | C4 | 8E | 21 | 00 | 00 | 9E | 02 | 3A | 80 | D0 | 72 | 38 | 2D | 40 | 10 |
| 0x06 | 2C | 45 | 20 | 06 | 44 | 21 | 00 | 00 | 1E | 02 | 3A | 80 | 18 | 71 | 38 | 2D |
| 0x07 | 40 | 58 | 2C | 45 | 00 | 56 | 50 | 21 | 00 | 00 | 1E | 00 | 00 | 00 | 00 | CE |
2) HDMI2 (2D FHD - Check Sum: 15BF)
3.2 Eunction Check
3.2.1. Check display and sound
*Check Input and Signal items. (cf. work instructions)
- 1) TV 2) AV (SCART/CVBS)
- 3) COMPONENT (480i)
- 4) RGB(PC : 1920 x 1080 @ 60 Hz) 5) HDMI1/2
- 6) PC Audio In
- * Display and Sound check is executed by Remote controller
-
-> Caution · Not to push the INSTOP KEY after completion if
- the function inspection.
3.4. CI+ key writing process.
(Device CN)
3.4.1. Download method
Connection : PCBA (USB Port) → USB to Serial Adapter (UC-232A) → RS-232C cable → PC(RS-232C port)
→ Caution : LD31Q chassis support only UC-232A driver. (only use this one.)
3.4.2. CI+ Key Download
1) Set CI+ Key path Directory at Start Mac & CI+ Download
- 2) Set COM 1,2,3,4 / 115200(Baudrate) (1)/(2)
- 3) Click port connection button(1)
- 4) Start CI+ Key Download, Push the button(4)
- 5) Check OK or NG.
- After completing download, CI + key values are increase by one automatically. To write CI+ key next SET, click CI+ key writing button(5) directly.
- 7) Check whether the key was downloaded or not at 'In Start' menu (Refer to below)
4. Total Assembly line process 4.1. Tool option & ADC Check
- 1) Press "Power on" key of service remote control.
- 2) Connect USB Port → USB to Serial Adapter (UC-232A) → RS-232C cable → PC(RS-232C port)
- Check the 'Tool Option' (Refer to the BOM Comments or Adjustment spec)
- 4) Check the 'ADC' is ok.
- 4.2. Model name & Serial number Down-
4.2.1. Model name & Serial number D/L
- 1) Press "Power on" key of service remote control.
- 2) Connect USB Port → USB to Serial Adapter (UC-232A) → RS-232C cable → PC(RS-232C port)
- 3) Write Model Name & Serial Number by use USB Port
- 4) Must check the serial number at the Diagnostics of SET UP menu. (Refer to below).
4.2.2. Method & notice
- Model Name & Serial Number D/L is using of scan equipment.
- Setting of scan equipment operated by Manufacturing Technology Group.
- Serial number D/L must be conformed when it is produced in production line, because serial number D/L is mandatory by D-book 4.0
* Manual Download (Model Name and Serial
Number)
If the TV set is downloaded By OTA or Service man, Sometimes model name or serial number is initialized. (Not always)
There is impossible to download by bar code scan, so It need Manual download.
- 1) Press the 'Instart' key of ADJ remote controller.
- 2) Go to the menu 'Model Number D/L' like below photo.
- 3) Input the Factory model name(ex 27MD73D-PZP) or Serial number like photo.
- 4) Check the model name Instart menu → Factory name displayed (ex 27MD73D-PZP)
- 5) Check the Diagnostics (DTV country only) → Buyer model displayed (ex 27MD73D-PZ)
4.3 Function Check
4.3.1. Check display and sound
- *Check Input and Signal items. (cf. work instructions)
- 2) AV (SCART/CVBS) 3) COMPONENT (480i)
- 4) RGB(PC : 1920 x 1080 @ 60 Hz)
- 5) HDMI1/2
- 6) PC Audio In
- * Display and Sound check is executed by Remote controller
- → Caution . Not to push the INSTOP KEY after completion if the function inspection.
4.3.2. PCMCIA CARD Check
You must adjust DTV 29 Channel and insert PCMCIA CARD
- If PCMCIA CARD works normally video signals will appear on screen.
But it works abnormally "No CA module" will appear on screen.
→ Caution: Set up "RF mode" before launching products.
4.3.3. 3D function Check(Model name: xxMD~)
Test equipment
1) Pattern Generator MSHG-600 or MSPG-6100 (HDMI 1.4 support)
2) Pattern: HDMI mode (Model No. 872, Pattern No. 83)
Test method
- 1) Input 3D test signal as Fig.1.
- 2) Press 'OK" key as a 3D input OSD is shown.
- 3) Check pattern as Fig2 without 3D glasses. (3D mode without 3D glasses)
Fig.1 ≺ HDMI Mode (Model No.872, Pattern No.83) ≻
Fig.2 < After entering 3D Mode > * without 3D glasses
434 PIP Check
- 1) Press "Power on" key of service remote control.
- 2) Input RGB & TV(ATV or DTV) signal.
- 3) Set Input mode to RGB.
- 4) Press 'PIP" key of ADJ remote controller
- 5) Check TV Video & Audio signal of Sub picture.
4.3.5 HDMI MHL Function Inspection.(HDMI2 Port only)
- 1) Insert HDMI cable for MHI function JIG connected to HDMI2 port of the SET.
- 2) Check that I ED of JIG is green light and check that set screen is correctly worked.
- 3) If NG situation or other HDMI jack connection, LED of JIG is red light and screen is not displayed.
사진 1. MHL 겉사 JIG (OK)
사진 2. MHL 겉 사 JIG (NG)
4.4. White balance adjustment
RGB Gains are fixed data for each model. Insert RS-232C Jack which is connected with PC for White Balance or equiva-
lent device.
|
Color
Temperature |
Cool | 9,300k | °К |
X=0.290 (±0.03)
Y=0.298 (±0.03) |
Inner pattern |
|---|---|---|---|---|---|
| Medium | 8,000k | °К |
X=0.300 (±0.03)
Y=0.310 (±0.03) |
(204gray,80IRE) | |
| Warm | 6,500k | °K |
X=0.318 (±0.03)
Y=0.334 (±0.03) |
||
| Luminance | Cool | Min : 80 | Тур : 110 |
|
|
| (cd/m²) | Medium | Min : 80 | Тур : 110 |
Inner pattern
(204gray,80IRE) |
|
| Warm | Min : 80 | Тур : 110 |
* Total Assembly line should be check whether the color coordinate(x,y) data refer to below table were meet or not. *Note : x.y coordinates are drifted about 0.007 after 30 mins
Note : x,y coordinates are drifted about 0.007 after 30 mins heat-run. So checking color coordinate within 5-min at total assembly line, consider x,y coordinates might be up to 0.007 than x,y target of each color temperature.
*Note : Manual W/B process using adjusts Remote control. 1) After enter Service Mode by pushing "ADJ" key,
Enter "White Balance" by pushing "▶" key at "White Balance".
| 0. Tool Option1 | ||
|---|---|---|
| 1. Tool Option2 | ||
| 2. Tool Option3 | ||
| 3. Tool Option4 | ||
| 4. Tool Option5 | ||
| 5. Tool Option6 | ||
| 6. Country Group | White Bala | ance |
| 7. Area Option | Color Temp. | |
| 8. ADC Calibration | R-Gain | 100 |
| 9. White Balance | G-Gain | 104 |
| 10. 10 Point WB | B-Gain | 192 |
| 11. Test Pattern | R-Cut | 64 |
| 12. EDID D/L | G-Cut | 64 |
| 13. Sub B/C | B-Cut | 64 |
| 14. Touch Sensitivity Setting | Test-Pattern | ON |
| 15 Ext. Input Adjust | Backlight | 100 |
| Reset | To Set |
* When doing Adjustment, Please make circumstance as below.
4.5. DPM Operation check
Measurement Condition: 100~240V@ 50/60Hz
Set Input to RGB-PC and connect D-sub cable to set – RGB Mode.
Set Input to HDMI1/2(with Input Label set to PC) and connect HDMI1/2 cable to set – HDMI Mode
2) Cut off H sync or V sync of signal.
3) Check DPM operation refer to the below table.
| Operating | Condition |
Sync
(H/V) |
Video |
LED
(SET) |
Wattage
(W) |
|---|---|---|---|---|---|
| Power S/W On |
Sleep mode -
RGB,HDMI |
Off/Off | Off | Amber | 1 |
HDMI2 DPM Operating condition with MHL
| HDMI2 Input | MHL Cable | HDMI & HDMI to DVI Cable | ||
|---|---|---|---|---|
| DPM | Х | 0 | ||
4.6. Model Name & SW Version & Adjust check.
* Press the 'Instart' key of ADJ remote controller
4.6.1. Model Name& SW Version Check
- 1) Check 'Model Name'.
- 2) Check 'S/W Version' (Refer to the IC Ver. in the BOM)
4.6.2. Adjust Check
- 1) Check 'Country Group'
- 2) Check 'Area Option'
- 3) Check 'Tool Option' (Refer to the BOM Comments)
- 4) Check 'Adjust ADC[Comp&RGB]' is OK.
- 5) Check 'EDID[RGB&HDMI1/2]' is OK.
- After check all, Press the 'EXIT' key of ADJ remote controller to go out SVC menu.
TROUBLE SHOOTING
1. No Power
2. No Picture
3. No Video
4. No Video - Component
6. No Video - HDMI
7. No Audio
EXPLODED VIEW
------ IMPORTANT SAFETY NOTICE -----
Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by A in the Schematic Diagram and EXPLODED VIEW.
It is essential that these special safety parts should be replaced with the same cor in this manual to prevent X-RADIATION, Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
NETCAST4.0 EU(DVB-T/C)_TUNER_BLOCK
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