Classe-DR3-pwr-sch维修电路原理图.pdf

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1、Date: February 26, 2003 Sheetof Size Document NumberREV Bdr3_vhc.sch Title Classe DR3 Very High Current (VHC) Federico Paoletti +V Q? MJ11016 Q? MJ11016 R19 100 Q7 MPSA56 Q8 MPSA56 C10 4700uC11 0.1u R33 75 C3 10n Q? MJ11016 Q? MJ11016 R12 274 Q2 MPS8599 D1 1N4148 D2 1N4148 R20 68k R13 1k IN 1 OUT 3

2、G N D 2 U? LM7812CT R11 10k C? 1500u C? 5u R9 33.2kC? 5u R? 10k R? 4.99k Q? 2N4341 Q3 MPS8599 Q5 MPS8599 R? 10M R? 100k R14 R C5 100u C6 0.47u C7 10n Q4 MPS8599 Q6 MPS8599 R? 200 R? 511 C8 0.1u C9 30p R22 75k RT1 5k25c R23 0.27 R24 0.27 R27 0.27 R28 0.27 Q? MJ11015 Q? MJ11015 idle curr. R25 0.27 R26

3、 0.27 R29 0.27 R30 0.27 R31 4.7 L12.5uH R32 4.7 C14 47n Q? MJ11015 Q? MJ11015 Q9 MPSA06 Q10 MPSA06 R21 100 C12 4700u C13 0.1u R34 75 C4 10n R16 681k D3 1N4148 D4 1N4148 R17 33.2k R18 274k R15 1.5k R10 49.9k R11 100k dc out offset T? D? MDA3502 RV? VARISTOR C? 10n C? 10n C? 30mF C? 30mF C? 30mF C? 30

4、mF C? 4.7u C? 4.7u C? 10n C? 10n regolare bias x 1 V di caduta su queste resistenze (=10A)R? 0.1 (4/0.4) R? 0.1 (4/0.4) C? 0.47u C? 10n C? 0.47u C? 10n +V -V F? 25A F? 25A per il dr3b non VHC togliere 2 coppie di finali e togliere due resistenza da 0.4 Ohm per ogni ramo il bias si regola a 1.5v di caduta (7.5 A) i condensatori di filtro da 30 a 20 mF -V RadioFans.CN 收音机爱 好者资料库