JBL-Digital12-eq-sch 电路图 维修手册.pdf

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1、123456789101112131415 A B C D E F G H I 151413121110987654321 I H G F E D C B A Model Name: Part No: Date: Drawn: Rev.a MBD-04020102 BU-120E 17-Oct-2000 MS/LL 2 Sheet: 1of1 U1 U1 LM324 C19 100nF C18 100nF C20 100nF R48 6k98 R40 68k C33 220pF C13 10nF C15 200uF C16 200uF 7 5 6 R44 10k R42 100k R43 10

2、0k LEVEL 1 5k LOG High Level In RCA Connector High Level Out 2 3 1 R30 16k5 U1 LOPASS 100k Lin Pot C7 33nF 13 14 12 2 3 1 4 6 5 +15V -15V C9 100nF C17 100nF R45 10k POT. HI-PASS / EQ LO-PASS LINE LEVEL INPUT R35 332k R39 36k5 R31 16k5 C14 330nF R27 8k25 Q2 2N3906 Q1 MPSA13 D4 1N4148 D3 1N4749A R18 3

3、30k R26 1000K R22 2k2 R20 4k7 R32 470k R19 1k R21 10k C26 10nF V+ V- C27 3n3F R52 1k R59 4k7 R57 1k R50 150R R4 47k U2 TL 082 R24 22k R25 47k R54 100R R55 100R R56 100R R53 100R DIODE CLIPPER BR RECT RS604 D6 1N5234B C8 100nF R9 2k R46 47R D10 1N4744A D9 1N4744A C4 100nF C5 100nF D1 1N5256B R1 1M5 R

4、16 470R R58 4k64 C3 330nF R3 33k2 L2 2.2uH L1 110uH C6 10uF C24 100nF R15 100k R4B 0.1R R4A 0.1R Q5 MPSA56 R6 1k Q4 MPSA56 R8 47k R7 3k3 R5 1k Q3 2N4401 V+V- CMC 2m2H C7A 100nF C7B 100nF R17 470R C1 4700uF C2 4700uF SHORT CIRCUIT PROTECT UVLO R IP RCA L IP RCA LED DRIVE C11 100uF LED1 2 Clr LED D2 1

5、N4148 R33 150R +6V V+ V- +15V S/D FR I/P GND -15V O/P MODULE S53 7 11 700Hz Lo-Pass +6V Supply OUTPUT FILTER R36 8k66 R2 8k66 R37 8k66 U1 LM324 U2 TL 082 PHASE SW SPDT LOPASS 100k Lin Pot C31 47nF R51 38k3 R49 383k L OP RCA R OP RCA U3 TL 082 U3 TL 082 C25 N/F C12 N/F C32 N/F C30 N/F From L IP RCA F

6、rom R IP RCA R11 N/F R10 N/F R13 N/F R12 N/F C28 N/F C10 N/F 5 6 7 +15 -15 3 1 2 R L SPKR LEV IO R L SPKR LEV IO TRANSFORMER IS MOUNTED ON FACPLATE AC Feed QUICK FIT TERMINAL GND QUICK FIT TERMINAL AC Return QUICK FIT TERMINAL SPK- QUICK FIT TERMINAL SPK+ QUICK FIT TERMINAL 10 9 8 R4C 0.1R D add 1N4735A 2 3 1 1 2 3 REMOTE LED2 N/F L3 L4 1 2 3 4 5 6 7 8 H-Pass Pot. 1 2 J7 1 2 J6 1 2 J5 1 2 J4 N/F N/F N/F N/F N/F N/F Jumper Jumper CZ N/F CW N/F C29 0R TRX MCI 4340E FUSE (On FUSE PCB) 0.5A To AC Feed To GND To AC ReturnTo Power Cord To Power Cord SW C add10nF N/F N/F RadioFans.CN 收音机爱 好者资料库