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1、TH-42PA20C驱动电路分析5-1ENERGYRECOVERYCIRCUIT（能量回收电路）C(PANEL屏幕)S1L1/2VoVoS2S3Vo1/2VoS1S2S3ONONONON为了节约电能，用此电路产生维持脉冲5-2.ENERGYRECOVERYCIRCUITforSCBOARD（能量回收电路-SC板）CHASSIS（型号）(42寸)S1Q6621,Q6622,Q6623Q6624,Q6625,Q6626DISCHARGE（放电）CHARGE（充电）S2S3Q6601,Q6602,Q6603,Q660
2、4Q6605,Q6606,Q6607,Q6608LL6611,L6612,L6613,L6614,L6615,L6616C(1/2V0)C6621,C6622,C6623,C6624,C6625,C6626V0Vsus（维持电压）CHECKLED（检测指示灯）D6583（不亮则SC板有问题）5-3.ENERGYRECOVERYCIRCUITforSSBOARD（能量回收电路-SS板）CHASSIS（型号）42寸S1Q6721,Q6722,Q6723Q6724,Q6725,Q6726DISCHARGE（放电）CH
3、ARGE（充电）S2S3Q6701,Q6702,Q6703,Q6704Q6705,Q6706,Q6707,Q6708LL6711,L6712,L6713,L6714,L6715,L6716C(1/2V0)C6721,C6722,C6723,C6724,C6725,C6726,C6727,C6728,C6729,C6730V0VsusCHECKLED（检测指示灯）D6785(不亮则SS板有问题）5-4SCAN&SUSTAINSIGNALSCANDRIVESIGNALSUSTAINDRIVESIGNALAddres
4、sPulseex:150line+5-5-1SCANSIGNALVSETSCANPULSEonSU/SDSCANGROUNDSUSTAINPULSEVSETBASE(vsus)+=VSCANVBKVADSETUPSC5-5-2SCboardVSUS1/2V0ENERGYRECOVERYCIRCUITS2S3S1CHARGES1DISCHARGELVBKBKVADGEN.VSET2GEN.VSETREGURATORVSCNGENELATORVSUS15VSCOUT(VF0)SCGND(VF)Q6520-Q6521
5、Q6511Q6512Q6551Q6552Q6553Q6555Q6522-Q6527Q6542-Q6547Q6641,42Q6601Q6602Q6605Q6606Q6621Q6624175V28V-90V155V175VCSHCSLCMHCMLCPHn-CPHCELCBKN-CELSCSUN-CECECMHCMLCBKCPHCPHCSHCSLVset218VVsus170VVbk155VCELCELSCSCVad△90VSCSUM/IM/IIC6401～IC6404IC6405～IC6408Vscn28VVset
6、VsusVbkVadCMHCPHCELCMLCSHCSLCBKCPHCELSCSCSCSUVfVfo5-5-3SCboardS1S2S3480linesSDModels5-5-4SUSTAINSIGNALVESUSTAINPULSEVE2SS5-5-5SSboardVSUS1/2V0ENERGYRECOVERYCIRCUITS2S3S1CHARGES1DISCHARGELVEREGULATORVSUSVE(5V)SSOUTQ6745Q6746C6747Q6741Q6742+-158VUMHQ6724Q6721Q
7、6701Q6702Q6705Q6706175V175VUMLUSHUSLUEHn-VELVELSUSTAINPULSEUEHUELUELUMLUMHUSHUSLVE158VVE2155VVsus170VUELUELUEHUMLUMHUSHUSLSustainVsus170VVe2５VVe158V5-5-6SSboard42”/37”SD/42”HD5-6-1SCANPULSEOUTPUT(SU&SDBoard)240PULSES240PULSES7610075741VfVf0SHIFTRESISTORSCANP
8、ULSEOUTICx4x2SUSD240PULSES240PULSESIC6401～IC6404IC6405～IC6408Upperside48BIT+64BITｘ3AddressPulseFCLKFCLFSIPRO1｜48064BITｘ3+48BITBottomsideFCLKFCLFSI480PulsesABFromＢｂｙPROPulseFromBFromBFromＡVfVfo5-
