Eiki LC-NB3E PC Offset adjustment, PC Gain adjustment, Offset Adjustment, Gain Adjustment

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Electrical Adjustments

PC Offset adjustment

1.Receive the 16-step gray scale computer signal.

2.Set to COMPUTER mode.

3.Enter the service mode.

[R-OFFSET ADJUSTMENT]

4.Connect an oscilloscope to test point “TP25R1” (+) and chassis ground (-).

5.Select group no. “3”, item no. “11” and change data value to adjust the waveform “a” (black portion ) to be maximum amplitude.

[G-OFFSET ADJUSTMENT]

6.Connect an oscilloscope to test point “TP25G1” (+) and chassis ground (-).

7.Select group no. “3”, item no. “12” and change data value to adjust the waveform “a” (black portion ) to be maximum amplitude.

[B-OFFSET ADJUSTMENT]

8.Connect an oscilloscope to test point “TP25B1” (+) and chassis ground (-).

9.Select group no. “3”, item no. “13” and change data value to adjust the waveform “a” (black portion ) to be maximum amplitude.

PC Gain adjustment

1.Receive the 16-step gray scale computer signal.

2.Set to COMPUTER mode.

3.Enter the service mode.

[R-GAIN ADJUSTMENT]

4.Connect an oscilloscope to test point “TP25R1” (+) and chassis ground (-).

5.Select group no. “2”, item no. “3” and change data value to adjust waveform “a” to be minimum ampli- tude.

[G-GAIN ADJUSTMENT]

6.Connect an oscilloscope to test point “TP25G1” (+) and chassis ground (-).

7.Select group no. “2”, item no. “4” and change data value to adjust waveform “a” to be minimum ampli- tude.

[B-GAIN ADJUSTMENT]

8.Connect an oscilloscope to test point “TP25B1” (+) and chassis ground (-).

9.Select group no. “2”, item no. “5” and change data value to adjust waveform “a” to be minimum ampli- tude.

White Level

(a)

(a)

Black Level

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Contents Model No. LC-NB3E Chassis No. MM8-NB3E00Contents Safety Instructions Safety PrecautionsSpecifications Adjustments after Parts Replacement Optical Adjustments Electrical AdjustmentsCircuit Protections FuseRecommendation Cabinet Top and Control Panel removal Mechanical DisassembliesMain Board removal Front Panel and R/C Board removal AV, AV Sub Board and Speaker removalAV board AV Sub board Filter Board removal Lamp Ballast Unit removalFilter board 1Optical Unit removal Power Box Cover and FansFN901, FN906 removalAB B Power and P.F. Board removal 2Optical Unit removalFan FN905 removal Interlock Switch leverOff from the Cabinet Bottom Fan duct top FN904 FN903 FN902 Optical Parts Disassemblies Integrator Lens-In disassemblyProjection Lens removal Condenser lens disassembly Condenser Lens-Out disassemblyRelay Lens-Out disassembly Polarized Glass-In removalPolarized Glass-Out removal Optical Unit Top removalLocations and Directions Key No. DescriptionLCD Panel/Prism Ass’y Replacement Important Notice on LCD Panel/Prism Assy ReplacementMounting Procedure LCD Panel/Prism Ass’y removalLamp Replacement How to reset Lamp Replace CounterHow to check Lamp Replace Counter Order Replacement LampOptical Adjustments Contrast adjustmentBefore Adjustment Slot BCondenser Lens adjustment Green b Slot B Moving of slot B Slot D Moving of Slot DCondenser Lens-Out adjustment Cyan a Slot B Moving of slot B Moving of slot DWhite a Slot B a Moving of slot B Relay lens-Out adjustmentSlot D Moving of slot D Electrical Adjustments IC1801 is not defectiveOutput Voltage adjustment Fan Voltage adjustmentPedestal adjustment Adjustment ConditionNRS adjustment Signal Center adjustmentBlack Level adjustment Signal Center AdjustmentPC Offset adjustment PC Gain adjustmentOffset Adjustment Gain AdjustmentAV Gain adjustment Gamma Shift adjustmentWhite Balance adjustment Common Center adjustmentService Adjustment Data Table Adjustment Item Initial Value Range Description Initial Value Range Description Group 500 ADC IC301 No Power TroubleshootingAbnormality occurs on the power circuit Power Board Main Board No Picture No picture from Video sourceNo picture from both of Video and Computer sources No picture from all of sourcesVideo Signal processing diagrams AV/PC-RGB-SWLens Motor Problems No SoundControl Port Functions System Control & I/O Port Table IC801MD2 IIC Bus I/O Expander IC2181 Port Functions IIC Bus I/O Expander IC1851 Port FunctionsIIC Bus DA Converter IC1831 Port Functions IIC Bus DA Converter IC1581 Port Functions IIC Bus DA Converter IC2161 Port FunctionsIIC Bus DA Converter IC2571 Port Functions VIDEO-IN WaveformsDrive TP52R/TP201R Drive TP52G/TP201G Drive TP52B/TP201G Sync OUT IC4101-29 Sync OUT IC4101-28 Sync in TP205Sync Drive TP62H Sync Drive TP62V DHS Tpdhs DVS Tpdvs Ballast SW TP28LCleaning Cleaning with air spray Disassembly CleaningIC Block Diagrams BA7078AF Selector, IC6241 CXA2101AQ RGB Matrix, IC4101 IC Block Diagrams IC Block Diagrams ML60851 USB I/F, IC9801 M62393 D/A, IC2571 TB1274AF Video Decoder, IC1101 TA1318N AFC Detector, IC6171 IC Block Diagrams Page Electrical Parts List Read Description in the parts listOUT of Circuit Board Board Assemblied BoardsKEY SW Board 610 299 7293 ASSY,PWB,POWER MM8B Power Board1AA0B10C352DA Fusible RES 22 JH 610 294 1708 ASSY,PWB,LINE Filter MS6A Line Filter BoardAV Board IC LT1399CS FILTER,EMI 100MHZ 610 297 1804 ASSY,PWB,AV SUB MD8A AV SUB Board1AA0B10C3700B 610 297 1828 ASSY,PWB,MAIN ME8B Main Board1AA0B10C371AA IC TB1274AF IC AD8183ARU C2103 C406 C568 Network 0X4 1/16W R152 R2549 R3544 R457 FILTER,LP 7MHZ Temp Board Accessories610 297 1873 ASSY,PWB,TEMP ME8A 1AA0B10C3710B Key No. Part No Description Mechanical Parts List Cabinet Parts Optical Parts Optical Parts List 67 Red Green Blue Red 52-a Optical Parts List MM8-NB3E00 MM8-NB3E00 MM8-NB3E00 Key to better communications Canada