Marshall_68_Super_Lead_Layout 电路图 维修手册.pdf
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Marshall_68_Super_Lead_Layout 电路图 维修手册.pdf
OT A A Choke ChokeOT CT Bias Tap HV Secondary Filament AC Fil. & Bias Grounds Standby HT Fuse PresenceBassMidsTrebleNormalBright Mains Filter (Voltage Doubler)Screens Filter Phase Inverter (V3) Filter Heyboer 100W PT Primary Secondary Power Board NormalBright - - + + - - - - + + + + + + + + + + 100u100u (32u) 100u (32u) 100u 32/32 20/20 16/16 Alts. - - - - - - + + - - + + Note - Transition period amp. Split Cathode on V1 are optional. Bypass Cap on Stage 2 (V2a) Cathode optional (330u, .68u, etc.) Bright Cap and Mixer Cap vary, Filter values varied (common alternates shown.) 56k balance resistors on screen filters are optional. 10k/2W decoupling resistor optional. 10k/2W8.2k/2W 10k/2W .022u .68u .022u .022u .022u .022u .1u .1u .1u 330u 330u 68k 68k 68k 68k 2.7k 120v 220v 240v Common To Mains Fuse For US 120v tap to AC Switch 470k 820 470 47k / 27k 27k 470k 100k 56k 10k 100k 100k 820 1M 1M 10k 100k 220k 82k 220k 15k 1M1M 100k .1u Note - PT Primary connections omited (Mains fuse, AC Switch, AC cord/IEC socket, 120v Lamp). OT Secondary omited (secondary leads, speaker impedance switch, output jacks). 1M-A 1M-A1M-A 250k-L25k-L5k-L 1R 2W 1R 2W 1R 2W 1R 2W 1k 5W 1k 5W 1k 5W 1k 5W 1k5/5k6 1k5/5k6 47p 250p 556p 68k 10u/8u 10u/8u RadioFans.CN 收音机爱 好者资料库
