Akai-AM32-int-sch维修电路原理图.pdf

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1、AKAI AM-32 (60W-channel) IMPORTANT : this is not the original AKAI AM-32 schematic . I have copied this scheme,following the traces and solders of PCB board of the amplifier ,when i repaired it. I dont guarantee that the whole scheme is exact and my instrument is not very precise, then IF YOU USE IT

2、 ,YOU DO IT TO YOUR RISK. Also, the schematic is not complete , but include the following circuits: - left channel final amplifier (note that the right channel has the same components name of left channel ) - final power supply - safety circuit - switch board (D board) - some components data Do not

3、include primary power supply Traced by MPANTEC ,with TARGET3001 FOR PCB POOL , RadioFans.CN 收音机爱 好者资料库 +24V(26V7) +15V -15V +24 R +VCC +VCC + + +15V -15V + - + + +VCC + Rel1 -VCC +VCC +VCC -VCC +B1 -B LED -B +B +B1(+56V6) -B(-66V6)+B(+66V6) -VCC(-43V) +VCC(+43V) + +- D2 D4 D1 D3 BR1 L4L3L2 L1 Fuse F

4、1 start S1 (DUAL NPN) TR103 2SC2910 -0V77 -0V71 56V3 54V7 56V8 -65V9 -65V2 0V -0V6 0V6 -0V5 -0V18 1V12 -1V12 R124 3K VR101 1K TR901 2SC3116 R125 1K5 C133C132 R118 470K R119 470K C106 R159 68 TR110 2SA1248 TR109 2SC3119 D110 R157 68 C105 TR903 2SA1490 L101 R143 10 R144 10 C111 C112 R128 16 R126 100 1

5、/2 R1 0R22 1/2 R1 0R22 R127 16 TR902 2SC3854 R130 27K D106 1N4148 R133 148K TR111 2SC2240 43V7 R135 47K C113R134 D107 1N4148 R145 47K TR112 2SA970 C107 R138 C142 C109 R140 R139 C108 R136 R149 C116 R153 C119 R152 C119 R152 R120 220 R115 220 D102 1N4148 C103 TR106 2SC2910 TR113 2SA970 TR104 2SA970 R15

6、6 22K C102 DL112 TR116 2SA970 TR105 2SA970 -66V4 -1V58 -65V6 R111 47K R110 100 56V56V2 -66V6 D103D104 R108 92 R107 92 C134 R102 100 C131 4u7 50V R101 100 LEFT IN R150 D108 D109 4700uF 4700uF C122 W104 C114 C114 R151 IC102 HA12002 Pin8Pin7Pin6Pin5Pin4Pin3Pin2Pin1 R147 R142 R141 R137 IC101 5218 2 38 4

7、 1 FEEDBACK SAFETY collector of TR111 right channel L W111 R J101 RIGHT OUT LEFT OUT TR102 2SC3381 R106 220C101 R105 3K DZ113 DZ114 R112 3K R116 680ohm W102 primary supply (not traced here) 220V 50Hz RadioFans.CN 收音机爱 好者资料库 SW2 JW51JW50JW49JW48JW47 ALL SWITCHES UNPRESSED PRESSED L R G L G R G L R G

8、L G R G L L L R R RL TO B-BOARD W8 L R J1 TO LED PANEL FROM A-BOARD TO B-BOARD LR DIRECT DAT/TAPE2 AUX TUNER PHONO CD w9 W10 J2 D-BOARD from power supply to bottom board W11 R G L G R G L W7 W6 W5 +IN2 -IN2 OUT2 VCC VEE +IN1 -IN1 OUT1 (155218) IC101 positive feedback BIAS overload revealing AC detect audio signal IN temperature revealing GND rel driver HA12002 87654321 2SK389 substrate DGSSGD 7654321 substrate CC BEEB 2SC3881 7 6 5 4 3 2 1