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website:http://biz.LGservice.com e-mail:http://www.LGEservice.com/techsup.html LCD TV SERVICE MANUAL CHASSIS : LD61A FACTORY NAME : 32LC2D(B)-EC/37LC2D(B)-EC/42LC2D(B)-EC MODEL : 32LC2D(B)/37LC2D(B)/42LC2D(B) CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. R
SAFETY PRECAUTIONS IMPORTANT SAFETY NOTICE 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 Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer. Leakage Current Hot Check (See belo
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SERVICING PRECAUTIONS CAUTION: Before servicing receivers covered by this service unit under test. manual and its supplements and addenda, read and follow the 2. After removing an electrical assembly equipped with ES SAFETY PRECAUTIONS on page 3 of this publication. devices, place the assembly on a conductive surface such as NOTE: If unforeseen circumstances create conflict between the aluminum foil, to prevent electrostatic charge buildup or following servicing precautions and any of the safety
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IC Remove/Replacement Some chassis circuit boards have slotted holes (oblong) through Circuit Board Foil Repair which the IC leads are inserted and then bent flat against the Excessive heat applied to the copper foil of any printed circuit circuit foil. When holes are the slotted type, the following technique board will weaken the adhesive that bonds the foil to the circuit should be used to remove and replace the IC. When working with board causing the foil to separate from or "lift-off" the bo
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SPECIFICATION NOTE : Specifications and others are subject to change without notice for improvement. 1.General Specification(TV) No Item Specification Remark 1. Video input applicable system PAL-D/K, B/G, I, NTSC-M, SECAM NTSC 4.43 2. Receivable Broadcasting System 1) PAL/SECAM BG EU/Non-EU 2) PAL/SECAM DK (PAL Market) 3) PAL I/I 4) SECAM L/L' 5) PAL-N/M 5),6) South America Market 6) NTSC M 3. RF Input Channel VHF : E2 ~ E12 PAL UHF : E21 ~ E69 CATV : S1 ~ S20 HYPER : S21~ S47 L/L' : B,
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2. General Specification No Item Specification Remark 1 Panel 32", 37", 42" TFT WXGA LCD 2 Frequency range H : 31 ~ 61Khz PC Input V : 56 ~ 75Hz 3 Control Function 1) Contrast/Brightness 2) H-Position / V-Position 3) Tracking : Clock / Phase 4) Auto Configure 5) Reset 4 Component Jack 1 : Y Middle east / NTSC Area 3 : Pb 5 : Pr 5 H/V-Sync Video Power consumption LED Power ON - - ≤ 150W(32") Green ≤ 190W(37") Green ≤ 240W(42") Stand by ≤ 3.0W Red Power off - - - * 6 LCD Module Type Size 32" 760.
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3.Optical Feature(LCD Module) No Item Specification Min. Typ. Max. Remark 1 Viewing Angle 10> R/L, U/D 178, 178 2 2 Luminance Luminance(cd/m ) 400 500 32/37/42 Variation 1.3 MAX/MIN 3 Contrast Ratio CR(32", 37") 600 800 All White/All Black CR(42") 400 550 All White/All Black CRD(32", 37") 1200 1600 All White/All Black CRD(42") 800 1100 4 CIE Color Coordinates White Wx Typ 0.285 Typ LPL(32") Wy -0.03 0.293 +0.03 Red Xr 0.640 Yr 0.343 Green Xg 0.280 Yg 0.605 Blue Xb 0.145 Yb 0.065 White Wx Typ
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5. RGB PC INPUT Mode Table No Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed Analog RGB, Digital RGB 1 720x400 31.468 70.8 28.321 2 640x480 31.469 59.94 25.17 VESA 37.684 75.00 31.5 VESA 3 800x600 37.879 60.31 40.00 VESA 46.875 75 49.5 VESA 4 832x624 49.725 74.55 57.283 5 1024x768 48.363 60.00 65.00 VESA(XGA) 56.47 70.00 75.00 VESA(XGA) 60.123 75.029 78.75 VESA(XGA) 6 1280x768 47.776 59.870 79.50 VESA(WXGA) 7 1360x768 47.720 59.799 84.75 VESA(WXGA) 8 1366x768 47.720 59.799 84.75 Su
7. Mechanical specification <32LC2D> No, Item Content Remark 1 Product Dimenson Width(W)(32"/37"/42") Length(D)(32"/37"/42") Height(H)(32"/37"/42") Before Packing 811 944 1054 235 286 302 630 726 813.5 With Stand After Packing 896 1052 1166 300 383 402 720 855 950 2 Product Weight Only SET 22Kg(32")/31Kg(37")/37.0Kg(42") With Stand With Box 25.5Kg(32")/33.3Kg(37")/42.3Kg(42") 8. Mechanical specification
Scart Arrangement 1.(Full Scart) Pin Signal Signal Level Impedance 1 Audio Output
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Scart Arrangement 2.(Half Scart) Pin Signal Signal Level Impedance 1 Audio Output B (right) 0.5 Vrms < 1㏀ 2 Audio Input B (right) 0.5 Vrms > 10㏀ 3 Audio Output A (left) 0.5 Vrms < 1㏀ 4 Ground (audio) - - 5 Ground (blue) - - 6 Audio input A (left) 0.5 Vrms > 10㏀ 7- - - 8 Function Select (AV control) High (9.5 - 12V) - AV Mode Mid (5 - 8V) - Wide Screen > 10㏀ Low (0 - 2V) - TV Mode 9 Ground (Green) - - 10 Comms Data 2 11 - - - 12 Comms Data 1 13 Ground (Red) - - 14 Ground (Blanking) - -
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ADJUSTMENT INSTRUCTION 6) Select proper CH_memory file(*.nvm) for each model at 1. Application Range [Channel Download] => [Write Batch]. This spec. sheet is applied to all of the LD61A chassis Next, select proper binary file(*.bin) including the CH manufactured at LG TV Plant all over the world. information for each model at [Channel Download] => [NVRAM File]. 2. Specification. 2.1 Because this is not a hot chassis, it is not necessary to use an isolation transformer. However, the use of isol
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3) Connect RS232 cable(Use Download Jig and general RS- Before AV ADC Calibration, should be executed the 232C Twisted Serial Cable). "Panel size selection 5. Select method of Panel size 5.1 Press ADJ Key in the Adjust remocon 5.2 Select "Panel Control" by using ▲/▼ (CH+/-) key, and press (ENTER) *Before upgrading "Hudson flash memory", push the switch on the download jig ‘inside’. 4) Operate LGIDS. 5) Select "Hurricane" and "ALL" on Model dialog and check your connection in Communication dial
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6.1 Adjustment of RF/AV/S-VIDEO 6.3 Adjustment of RGB * Required Equipments * Required Equipments - Remote controller for adjustment - Remote controller for adjustment - MSPG-925F Pattern Generator (Which has Video Signal: -l MSPG-925F Pattern Generator 100% Color Bar Pattern shown in Fig. 1) (Which has XGA [1024*768] 60Hz 100% Color Bar pattern => Model: 202 / Pattern: 33 shown in Fig. 3) Case1) EC and FC model use PAL-BGDHI (composite signal) 6.3.1 Method of Auto RGB Color Balance 1) Input the
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SVC REMOCON NO KEY FUNTION REAMARK To turn the TV on or off 1 POWER To turn the TV on automatically if the power is supplied to the TV. (Use the 2 POWER ON POWER key to deactivate): It should be deactivated when delivered. To activate the mute function. 3 MUTE To check TV screen image easily. Shortcut keys 4 P-CHECK To check TV screen sound easily Shortcut keys 5 S-CHECK To select size of the main screen (Normal, Spectacle, Wide or Zoom) Shortcut keys 6 ARC Switch to closed caption broadcasting
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- 17 - TROUBLESHOOTING YES NO Is the input Attach the input No image Is the Set ON? cable attached? cable(s) NO YES Push the POWER ON key Check the Power Error What is Condition of all PASS the input signal Connectors, wafers, mode? I2C In the FAIL system. Check 33V Check Vout FAIL And 5V at pin RF Signal at pin 9. 7,6 resp. of Of Tuner Tuner PASS PASS Change the Tuner Check 24bit PASS PASS PASS FAIL Check LVDS Check Main_V Check Sub_V Check Vout Correct the circuit RGB at AR700- Output of
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- 18 - YES NO Is the input Is the Attach the input No image cable attached? cable(s) Set ON? NO YES Push the POWER ON key Check the Power Error What is Condition of all PASS the input signal Connectors, wafers, I2C In the mode? FAIL system. Check CVBS Check 3.3V FAIL AV1 Signal at R103 At L110 on jack of jack board board PASS PASS Replace Jack board PASS Check 24bit PASS Check LVDS Check Main_V Check Sub_V RGB at AR700- Output of Cortez At R309 At R302 AR705 PASS Check for S/W error FAIL FA
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- 19 - YES NO Is the Attach the input Is the input cable No image Set ON? cable(s) attached? NO YES Push the POWER ON key Check the Power Error What is Condition of all PASS the input signal Connectors, wafers, mode? I2C In the FAIL system. Check CVBS Check 3.3V FAIL AV2 Signal at R105 At L110 on jack of jack board board PASS PASS Replace Jack board Check 24bit PASS PASS Check LVDS Check Main_V Check Sub_V RGB at AR700- Output of Cortez At R309 At R302 AR705 PASS Check for S/W error FAIL F
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- 20 - YES NO Is the Attach the input Is the input cable No image cable(s) Set ON? attached? NO YES Push the POWER ON key Check the Power Error What is Condition of all PASS the input signal Connectors, wafers, mode? I2C In the FAIL system. Check CVBS Check 3.3V FAIL AV3 Signal at R144 At L110 on jack of jack board board PASS PASS Replace Jack board Check 24bit PASS PASS Check LVDS Check Main_V Check Sub_V RGB at AR700- Output of Cortez At R309 At R302 AR705 PASS FAIL Check for S/W error FA
