LG Electronics 20LS7D(C)-UB service manual Adjustment Instruction, Application Object

Page 10

ADJUSTMENT INSTRUCTION

1. Application Object

These instructions are applied to all of the LCD TV, LA74E.

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 equipment.

(2)Adjustments must be done in the correct order.

(3)The adjustments must be performed in the circumstance of 20±5°C of temperature and 65±10% of relative humidity if there is no specific designation.

(4)The input voltage of the receiver be must kept 110V, 60Hz when adjusting.

(5)The receiver must be operational for about 15 minutes prior to the adjustments.

(6)Perform preliminary operation after receiving 100% White Pattern (06CH). (Or 3. White Pattern status of Ez-Adjust)

-White Pattern entry method

1)Enter into Ez-Adjust by pressing the ADJ key on the adjustment R/C.

2)100% FULL WHITE PATTERN appears if pressing the OK (A) key after selecting the 3.WHITE PATTERN with the CH + / - KEY.

*It is possible to heat run the set without a separate signal generator in this mode.

Caution : Care must be taken as afterimage phenomena may occur about the black level part of screen If leaving pause image turned on for more than 20 minutes (especially inner digital pattern (13 CH), Cross Hatch Pattern (09CH) with significant black/white contrast).

3-2. JIG Connection

3-3. Establishment Program

(1)Establish LGE Monitor Tools v1.1

(2)The program work and it is opened program window as seen below.

3. MICOM Download(Option)

3-1. Required Test Equipment

(1)JIG-LEVER TYPE for adjusting: 1EA

(2)PC & MONITOR: 2EA

(3)BOARD for INTERFACE: IIC & ISP BOARD: 2EA

(4)15P D-SUB CABLE: 2EA

(5)Using the 12/15 line of D-SUB 15P 12-SDA/15-SCL

(3)Click the first icon shown in fig.9. The window seen in fig.10 should appear.

- 10 -

Image 10
Contents LCD TV Contents General Guidance Do not use a line Isolation Transformer during this checkServicing Precautions Power Output, Transistor Device Removal/Replacement IC Remove/ReplacementSmall-Signal Discrete Transistor Removal/Replacement Diode Removal/ReplacementGeneral SpecificationTV SpecificationApplication range Test method Chroma & Brightness WhiteComponent Video Input Y, CB/PB, CR/PR Mechanical specification RGB input PC/DTVAdjustment Instruction Application ObjectADC-Set Adjustment Set Method23LS7D-UB Hdmi Preparation for Adjustments & Setting of DeviceRequired Test Equipment 23LS7D-UB RGBAdjustment of White Balance Required EquipmentTroubleshooting TV/CATV doesnt displayVideo doesnt display Component doesnt display Rgbpc doesnt display Hdmi doesnt display LCD Exploded View Exploded View Parts List Replacement Parts List Description / Specification C1608C0G1H220JT 22pF 5% 50V C0G -55TO+125C DIODEs TRANSISTORs & FETs ICsRESISTORs MNR04M0APJ680 68OHM 5% 1/16W 4P 8P R1185 R4007 0RJ1001C678 R4147 R6031 COILs & FILTERs & INDUCTORs CONNECTORsSWITCHes JACKsOTHERs LED,DIP BL-BUBGE301 Round 3MMPage Page Mar