PDP驱动电路分析以THPAC为例课件

1、5-1ENERGY RECOVERY CIRCUIT（能量回收电路）C(PANEL屏幕)S1L1/2 VoVoS2S3Vo1/2VoS1S2S3ONONONON为了节约电能，用此电路产生维持脉冲5-1ENERGY RECOVERY CIRCUIT（能量回5-2. ENERGY RECOVERY CIRCUIT for SC BOARD（能量回收电路-SC板） CHASSIS（型号） (42寸) S1 Q6621, Q6622, Q6623 Q6624, Q6625, Q6626DISCHARGE（放电）CHARGE（充电） S2 S3 Q6601, Q6602, Q6603, Q6604 Q6

2、605, Q6606, Q6607, Q6608 L L6611, L6612, L6613, L6614, L6615, L6616 C (1/2V0) C6621, C6622, C6623, C6624, C6625, C6626 V0 Vsus（维持电压） CHECK LED（检测指示灯） D6583（不亮则SC板有问题）5-2. ENERGY RECOVERY CIRCUIT f5-3. ENERGY RECOVERY CIRCUIT for SS BOARD（能量回收电路-SS板） CHASSIS（型号） 42寸 S1 Q6721, Q6722, Q6723 Q6724, Q672

3、5, Q6726DISCHARGE（放电）CHARGE（充电） S2 S3 Q6701, Q6702, Q6703, Q6704 Q6705, Q6706, Q6707, Q6708 L L6711, L6712, L6713, L6714, L6715, L6716 C (1/2V0) C6721, C6722, C6723, C6724, C6725, C6726, C6727, C6728, C6729, C6730 V0 Vsus CHECK LED（检测指示灯） D6785(不亮则SS板有问题）5-3. ENERGY RECOVERY CIRCUIT f5-4 SCAN & SUST

4、AIN SIGNALSCAN DRIVE SIGNALSUSTAIN DRIVE SIGNALAddress Pulseex:150 line5-4 SCAN & SUSTAIN SIGNALSCAN +5-5-1 SCAN SIGNALVSETSCAN PULSEon SU/SDSCAN GROUNDSUSTAIN PULSEVSET BASE(vsus)+=VSCANVBKVADSET UP+5-5-1 SCAN SIGNALVSETSCAN PUSC5-5-2 SC boardVSUS1/2 V0ENERGY RECOVERY CIRCUITS2S3S1 CHARGES1 DISCHAR

5、GE LVBKBKVADGEN.VSET2GEN.VSETREGURATORVSCNGENELATORVSUS15VSC OUT(VF0)SC GND(VF)Q6520-Q6521Q6511Q6512Q6551Q6552Q6553Q6555Q6522- Q6527Q6542 - Q6547Q6641,42Q6601Q6602Q6605Q6606Q6621Q6624175V28V- 90V155V175VCSHCSLCMHCMLCPHn-CPHCELCBKN-CELSCSUN-CECESC5-5-2 SC boardVSUS1/2 V0ENECMHCMLCBKCPHCPHCSHCSLVset 2

6、18VVsus170VVbk155VCELCELSCSCVad 90VSCSUM/IM/IIC6401IC6404IC6405IC6408Vscn28V VsetVsusVbkVadCMHCPHCELCMLCSHCSLCBKCPHCELSCSCSCSUVfVfo5-5-3 SC boardS1S2S3480 linesSD ModelsCMHCMLCBKCPHCPHCSHCSLVset 2185-5-4 SUSTAIN SIGNALVESUSTAIN PULSEVE25-5-4 SUSTAIN SIGNALVESUSTAINSS5-5-5 SS boardVSUS1/2 V0ENERGY RE

7、COVERY CIRCUITS2S3S1 CHARGES1 DISCHARGE LVEREGULATORVSUSVE (5V)SS OUTQ6745Q6746C6747Q6741Q6742 +-158VUMHQ6724Q6721Q6701Q6702Q6705Q6706175V175VUMLUSHUSLUEHn-VELVELSS5-5-5 SS boardVSUS1/2 V0ENESUSTAIN PULSEUEHUELUELUMLUMHUSHUSLVE158VVE2155V Vsus170VUELUELUEHUMLUMHUSHUSLSustainVsus 170VVe2 VVe158V5-5-6

8、 SS board42”/37”SD/42”HDSUSTAIN PULSEUEHUELUELUMLUMHU5-6-1 SCAN PULSE OUTPUT (SU & SD Board) 240 PULSES240 PULSES7610075741VfVf0SHIFT RESISTOR SCAN PULSE OUT IC x 4 x 2SUSD240 PULSES240 PULSES5-6-1 SCAN PULSE OUTPUT (SU & IC6401IC6404IC6405IC6408Upper side48BIT+64BIT3Address PulseFCLKFCLFSIPRO148064

9、BIT3+48BITBottom sideFCLKFCLFSI480PulsesABFrom PRO PulseFrom BFrom BFrom VfVfo5-6-2 SCAN PULSE OUTPUT Address Pulse (SU & SD Board) SUSSD ModelsIC6401Upper sideAddress PulseF5-6-3 SCAN PULSE OUTPUT (SU & SD Board) 64Q640176100918599S.R.76100918599S.R.76 159185S.R.166448761009185S.R.9964SUSD1ST4TH2ND

10、3RD6476100918599S.R.FSIFSISD板：IC6405-64线IC6406-64线IC6407-64线IC6408-48线SU板：IC6401-48线IC6402-64线IC6403-64线IC6404-64线5-6-3 SCAN PULSE OUTPUT (SU & 5-8-1 故障检测 SC板主要电压和驱动波形：Vsus=170VVbk=155VVset=218VVscn=30VVad= -90VSS板主要电压和驱动波形：Vsus=170VVe=150VVda=67VSC/SS板电压与图像变化情况电压调节范围变化情况Vad 90V-163V -70V低于139V出现篮黑点

11、Vsus 180V159V 204V低于165V图像变暗Ve 150V91V 172V低于130V出现蓝点低于110V出现深蓝点低于102V出现黑点5-8-1 故障检测 SC板主要电压和驱动波形：SS板主要5-8-2 故障检测主要故障现象：保护，指示灯闪烁2次。图像负像或有斑点图像水平拉丝图像水平一条线或宽带5-8-2 故障检测主要故障现象：5-8-3 修理实例故障现象：保护，指示灯闪烁2次。分析：指示灯闪烁2次，通过前面讲述的修理流程，判断是SC板。在SC板上有5路保护，输出2路保护信号。D6584是1/2V0的保护控制。D6468是VF0的保护控制。D6459是VF的保护控制。D6470是VSCN的保护控制。D6480是VAD的保护控制。检修经过：开机测量D6584、D6468、D6459、D647