Sanyo PLC-XU45 service manual PC Offset adjustment, M12 PC Gain adjustment, AV Gain adjustment

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Electrical Adjustments

nPC Offset adjustment

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

2.Set to COMPUTER mode.

3.Enter the service mode.

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.

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.

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.

(a)

Black Level

m12 PC Gain adjustment

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

2.Set to COMPUTER mode.

3.Enter the service mode.

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.

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.

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)

,AV Gain adjustment

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

2.Set to VIDEO mode.

3.Enter the service mode.

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.

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.

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)

.Common Center adjustment

1.Receive the 1 dot black & white pattern computer sig- nal.

2.Set to COMPUTER mode.

3.Enter the service mode.

4.Project only green light component to the screen.

5.Select group no. “3”, item no. “8” and change data value to obtain the minimum flicker on the screen.

6.Project only blue light component to the screen.

7.Select group no. “3”, item no. “9” and change data value to obtain the minimum flicker on the screen.

8.Project only red light component to the screen.

9.Select group no. “3”, item no. “10” and change data value to obtain the minimum flicker on the screen.

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Contents PLC-XU46 PLC-XU46 PLC-XU45Contents Safety Instructions Do not Attempt to Servicing Remote Control UnitSpecifications Adjustments after Parts Replacement Optical Adjustments Electrical AdjustmentsCircuit Protections Type T4.0AH 250V Fuse Little Fuse INC. TypePossible causes RecommendationCabinet Top and Control Panel removal Mechanical DisassembliesMain Board removal AV, DVI, Temp Board and Speaker removal Front Panel and R/C Board removalTemp board DVI boardLamp Ballast Unit removal Filter Board removalIsolation sheet Lamp ballast board SW902 Filter boardPower Box Cover and FansFN901, FN906 removal Optical Unit removalPower and P.F. Board removal ⁄0Fan FN905 removal ⁄1Fans FN902, FN903, FN904 removalOptical Parts Disassemblies Integrator Lens-In disassemblyProjection Lens removal Condenser lens disassembly Condenser Lens-Out disassemblyPolarized Glass-In removal Relay Lens-Out disassemblyHolder Polarized Glass-Out/Pre-Polarized Glass removal Optical Unit Top removalLCD Panel Prism Ass’yLocations and Directions Key No. DescriptionLCD Panel/Prism Ass’y removal LCD Panel/Prism Ass’y ReplacementColor Shading Correction How to reset Lamp Replace Counter Lamp ReplacementHow to check Lamp Replace Counter Contrast adjustment Optical AdjustmentsB-CONTRAST Adjustment Condenser 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 For PLC-XU45 Output Voltage adjustment For PLC-XU46Fan Voltage adjustment For PLC-XU45 Fan Voltage adjustment For PLC-XU46X12 Pedestal adjustment C12 NRS adjustmentV12 Signal Center adjustment Black Level adjustmentPC Offset adjustment M12 PC Gain adjustmentAV Gain adjustment Common Center adjustment⁄11 White Balance adjustment ⁄01 Gamma Shift adjustmentAdjustment TB1274 CXA2101TA1318 LP05 TurboGroup 10 Option Fan ControlGroup 500 ADC Group 510 Ntsc GakakuGroup 513 Hdtv 1080i-50 Gakaku Group 514 Hdtv 1035i GakakuGroup 515 Hdtv 720p Gakaku Group 516 Hdtv 575p GakakuTest Points and Locations Main BoardTroubleshooting Abnormality occurs on the power circuitFuse Thermal sw. Interlock sw F601IC801 No picture from Video source No picture from DVI sourceNo picture from both of Video and Computer sources No picture from all of sourcesVideo Signal processing diagrams No audio signals at AV input circuit Incorrect operation of VIDEO/COMPUTER mode switchingNo audio output signal at speaker No power supply at audio circuitControl Port Functions System Control & I/O Port Table IC801Control Port Functions 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 WaveformDrive 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 sprayIC Block Diagrams BA7078AF Selector, IC6241 CXA2101AQ RGB Matrix, IC4101 IC Block Diagrams L3E07050 Color, Gamma Correction & Timing Controller , IC401 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 Assemblied Boards ME3-XU4500, PLC-XU45 KEY SW Board610 292 5609 ASSY,PWB,KEY SW MS6A Assemblied Boards MF3-XU4600, PLC-XU46AV Board 610 299 7330 ASSY,PWB,AV MK8ATransistor Integrated CircuitNP-ELECT 610 299 7347 ASSY,PWB,DVI MK8A DVI BoardCoil Power Board 610 301 0939 ASSY,PWB,POWER MK8A610 305 8641 ASSY,PWB,POWER MF3A For ME3-XU4500, PLC-XU45MT-POLYEST 0.047U K MF3-XU4600, PLC-XU46 Transformer610 301 0946 ASSY,PWB,P.F. MK8A Board610 305 8658 ASSY,PWB,P.F. MF3A Line Filter Board Main Board610 301 0953 ASSY,PWB,LINE Filter MK8A 405 014 4608 2SC2412K T146 173 9803 2SC3928A1R 015 8704 IC MM1031XM SN74AHCT1G14DBVR C1539 403 164 0204 403 373 C5217 403 164 0204 Network RB413 645 037 0663 Network 22X4 0.063W R1132 R152 401 8104 R2546 401 105 7909 R336 401 7909 R433 401 105 3901 Fusible 610 304 8932 ASSY,PWB,TEMP ME3A Temp BoardDiode Integrated Circuit Remote Control AccessoriesAC Cord Mechanical Parts List Optical Parts 67 Red Green Blue Polarized glass Optical filterWV52-a Model PLC-XU46 Model PLC-XU45Mechanical Parts List Optical Parts Cabinet Parts ScrewsChassis Parts Page Diagrams & Drawings Schematic Diagrams Printed Wiring Board DrawingsPLC-XU45 PLC-XU46Parts description and reading in schematic diagram Resistor ReadingCircuit Block Diagram 5VS 3VS5VS 5VDVI 5VD 9V MCIAV Sidea DVI Sidea Printed Wiring Board DiagramsDVI Sideb Sidea Main SideaTemp Sidea Main Sideb SidebTemp Sideb IC5211Power Sidea Power Sideb K6SK6R IC671KEY SW Sidea Line Filter SideaKEY SW Sideb K6BA10 Schematic Diagrams PLC-XU45,46 A11 Left Line Filter BaordIC681 FA7701VSchematic Diagrams PLC-XU45,46 A11 Right Ower SupplyIC6171 Schematic Diagrams PLC-XU45,46 A12 LeftAudio Schematic Diagrams PLC-XU45,46 A12 Right TA1318AFSchematic Diagrams PLC-XU45,46 A13 Left DigitalSchematic Diagrams PLC-XU45,46 A13 Right MatriSchematic Diagrams PLC-XU45,46 A14 Left CG1/CG2-SWAD8185ARU AD8183ARUSchematic Diagrams PLC-XU45,46 A14 Right 3VS C201 TE201EIC301 Schematic Diagrams PLC-XU45,46 A15 LeftIC8001 Digital Color Unformity Correction Timing Control Schematic Diagrams PLC-XU45,46 A15 RightIC1341 50-52 Schematic Diagrams PLC-XU45,46 A16 LeftLamp Schematic Diagrams PLC-XU45,46 A16 Right SUBCPU MemorySchematic Diagrams PLC-XU45,46 A17 Left ColorUniformity & Gamma CorrectionLevel Schematic Diagrams PLC-XU45,46 A17 RightShift Schematic Diagrams PLC-XU45,46 A18 Left Schematic Diagrams PLC-XU45,46 A18 Right Pin description of diode, transistor and IC IC IC
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