Laney_MXD120-H-Twin_Schematics电路图.pdf

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1、Newlyn Road, Cradley Heath, West Midlands. B64 6B www.laney.co.uk Laney Classic British Amplification MXD120/H/Twin Service InformationService Information RadioFans.CN 收音机爱 好者资料库 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 DD CC BB AA Title NumberRevisionSize A3 Date:10/10/2003Sheet of File:C:Documents and Sett

2、ings.9387_6.SchDrawn By: MXD65 / MXD120 PREAMP 93876 119387_6.Sch Rich Thompson MJACK SK1 SJACK SK3 4N7 100V C4 47P 50V C2 10K R1 1M R2 GG G GG TL072 U1A TL072 U1B 22K R4 4K7 R6 G +15v -15V 10N 100V C9 100N 63V C19 100K R19 12 147 CD4069UBE U2A 2N3819 Q2 100K R18 10N 100V C17 G 47K R20 1M R24 34 CD4

3、069UBE U2B 100KA6SD VR5A 100KA6SD VR5B 100N 63V C20 100N 63V C18 22N 100V C22 G 47K R22 1M R25 220K R26 56 CD4069UBE U2C 98 CD4069UBE U2D 1M R23 47P 50V C21 3N3 50V C32 3K3 R36 220N 63V C23 220N 63V C28 100N 63V C31 22KB6S VR9 100KA6S VR7 2K2B6S VR8 G TL072 U3A -15V +15V 10K R35 10K R33 2P2WPS SW2B

4、G 2P2WPS SW2A 10K R34 10K R32 10K R29 15K R30 15K R37 22K R31 100N 63VC25 4N7 100V C27 TL072 U3B GG 47N 100V C24 100KA6S VR6 G 220K R27 220K R3847P 50V C29 TL072 U4A 2N3819 Q3 +15V -15V G 100K R40 100K R39 47P 50V C30 TL072 U4B G Bot Top G PHONOSTV SK2 22K R43 1N4148 D10 1N4148 D9 +15V-15V 1N4148 D8

5、 1N4148 D7 G 100K R8 10K R3 33K R5 3N3 50V C12 10K R9 220N 63V C14 220N 63V C13 100N 63V C10 22KB6S VR4 100KA6S VR2 2K2B6S VR3 G G G 100N 63V C8 1N 100V C5 100KA6S VR1 220K R7 2N3819 Q1 G 1N4148 D3 100N 63V C11 100K R10 100K R14 470K R12 10K R16 1K R13 3V9 ZD0.5W D4 2P2WPS SW1B 2P2WPS SW1A G -15V 2K

6、2 R15 BC307 TS2 BC307 TS1 LED3MMG D5 -15V G G 100N 63V C15 G G G G 22K R46 G 10K R11 -15V 22KB6S VR10 G 100K R41 1 2 3 4 5 6 HD6WL HD3 560R 5W R45 560R 5W R44 15V ZD1.3W D12 15V ZD1.3W D11 47U 50V C36 47U 50V C37 +15V -15V GG GG G 1N4148 D1 1N4148 D2 +15V -15V 2U2 63V C7 150K R21 1K R42 2U2 63V C35

7、100K R47 G 270P 250V C6 Input Clean Channel Treble Mid Bass Drive Channel Treble Bass Mid Tape/CD In Max On/Off Master Volume DSP Level TO OUTPUT PCB 9353/9391 FootSwitch Channel Select Drive On G Line Out -15V 4K7 R49 LED3MMR D13 GPower 0R0 LN1 0R0 LN2 +15V 1K R17 5V1 ZD0.5W D6 G 470U 16V C16 G VDD

8、 VDD G 0R0 LN9 0R0 LN3 0R0 LN5 0R0 LN8 0R0 LN7 100N 63V C3 100N 63V C1 G G 1N 100V C26 NOTE: All capacitors to be rated at 16V or higher NOTE: All resistors to be 1/4W unless otherwise stated 6K8 R28 0R0 LN6 G +5VDSP Programming Header PTA2/IRQ PTA0 PTA4 PTA1 PTA5/OSC 1 2 3 4 5 6 HD2 1 2 3 4 5 6 HD1

9、 PTA3 +15V -15V 1 2 3 4 C 16PGRY SW3 G DSP Program Select FX Return FX Send GND INOUT 7805 U5 G +5VDSP 100N 63V C34 10U 50V C33 FXSEND FXRETURN FXRETURN FXSEND MJACK SK4 G 0R0 LN12 0R0 LN11 0R0 LN10 +15VDSP 1K R50 330R 5W R51 15V ZD1.3W D14 G 10U 50V C38 100K R52 10K R48 G 0R0 LN14 0R0 LN15 0R0 LN16

10、 Hard wire on top side of pcb AA NOTE: NOTE: MXD65 / R51 = 270R NOTE: MXD120 / R51 = 330R RadioFans.CN 收音机爱 好者资料库 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 DD CC BB AA Title NumberRevisionSize A3 Date:23/10/2003Sheet of File:D:9391_39391_3.SchDrawn By: MXD120 OUTPUT 93913 119391_3.Sch Rich Thompson BLT Indust

11、ries G +45V -45V Extension Loudspeaker FP Flame proof resister Must only be replaced with same type and rating Indicates safety critical component Must only be replaced with approved type 4700U 63V C9 4700U 63V C12 AC AC -V +V 6A 200V BR1 SPADE4.8 SP2 SPADE4.8 SP3 SPADE4.8 SP1 220N 250V C15 G Mains

12、Switch Mains In Black(Brown) Green/Yellow White (Blue) ChassisTransformer Primary AC Line(Live) AC Input (Neutral) These items not on pcb IEC Inlet Fuse Integral to IEC Fuse MAINS FUSE 230V =T2A L, 115V = T5A L MAINS TRANSFORMER 1K R3 10K R4 2U2 63V C1 100U 25V C5 Gmu 2N3819 Q1 Gmu 3V9 ZD0.5W D2 3V9

13、 ZD0.5W D1 Gi 1N 100V C2 Gi Gi MPSA92 TS1 MPSA92 TS3 MPSA92 TS2 MPSA92 TS4 MPSA42 TS5 MPSA92 TS10 220R R7 100R R9 1K R8 100R R6 47U 50V C3 Gi 10K R15 100P 100V C4 100K R5 1N4148 D7 1N4148 D3 2K2 R10 MPSA92 TS6 220R R11 MPSA42 TS9 2U2 63V C11 SAP16N TS7 SAP16P TS11 330R R17 330RR20 6K8 R18 6K8R19 100

14、N 63VC10 100N 63VC13 1N4148D6 1N4148D8 220R R22 470RH VR2 1N4007 D9 1N4007 D5 G G 47N 100V C16 10R 2W5 R23 10R 2W5 R24 COIL20T L1 G +45V -45V 100N 63V C14 100N 63V C8 MPSA42 TS8 10K R12 33K R13 1U 63V C6 Gmu Gmu 1N4148 D4 Gmu 1N4007 D11 1N4007 D10 MJACKSJ SK4 0R0 LN3 0R0 LN6 TestPoint1 TestPoint2 Se

15、t VR5 to give 20mV across TP1 and TP2 NOTE: Refer to service manual before adjusting bias preset BIAS ADJ 0R0 LN7 Gmu 1KH VR1 100R R1 100R R2 OFFSET ADJ 330R R16 47P 50V C7 0R0 LN5 Head Version Only! MJACKGSJ SK2 FX Send FX Return Gi 0R0 LN8 0R0 LN9 -45V2 -45V2 0R22 5W R14 0R22 5W R21 0R0 LN4 SPADE4.8 SP4 SPADE4.8 SP6 Internal Loudspeaker 0R22 5W R29 G 220R R28 10R 2W5 R25 10R 2W5 R26 +40V -40V G G Gi 0R0 LN10 HARDWIRED SOCKET Wired Direct to Output PCB 1 2 3 4 5 6 HD6WL HD1 +40V-40V To Preamp PCB G -45V2 120V = 5600-2052B 230V = 5600-2050B Mains Transformer RadioFans.CN 收音机爱 好者资料库