Marshall Amplification manual Gain Stages, JVM 2 Channel Block Diagram

Page 9

JVM 2 Channel Block Diagram

CLEAN

SHAPE

CLEAN / CRUNCH

GAIN

V6:A

INPUT

OD / GAIN

V6:BV7:A

GAIN

CATHODE

FOLLOWER

V7:B V8:A

CLN / CR

TONE

OD

TONE

CRUNCH VOL

OD VOL

CATHODE

FOLLOWER

V8:B

+4 / -10

PARALLEL LOOP

 

 

 

LOOP

 

 

 

 

 

 

 

 

RECOVERY

 

 

 

 

V9:A

 

MIX

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CLEAN /

CRUNCH

REVERB

OVERDRIVE

REVERB

LEVEL

REVERB MIXER

 

 

 

 

V9:B

POWER AMP INSERT

 

 

 

 

SERIES LOOP

BYPASS

 

 

PRE-AMP OUT

PRE-AMP OUT

 

 

 

 

 

 

 

 

 

 

 

 

/ SEND

/ RETURN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GAIN STAGES

CLEAN GREEN : V6:A, V7:B

CRUNCH ORANGE : V6:A, V7:A GAIN OFF, V7:B

RED : V6:A, V7:A, GAIN ON, V7:B

OD GREEN : V6:A, V7:A GAIN ON, V7:B

MASTER 1

MASTER 2

RESONANCE

 

SEND

RETURN FX LOOP

 

 

 

BYPASS

EMULATED

 

 

 

LINE OUT

OUTPUT VALVES (1 & 4 NOT USED IN 50W)

 

 

 

PHASE SHIFTER

 

V1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

V5

 

V2

 

 

 

 

 

V3

V4

PRESENCE

SPEAKER

OUT

ORANGE : V6:A, V6:B, V7:A GAIN OFF, V7:B RED : V6:A, V6:B, V7:A GAIN ON, V7:B

VALVE CHART

V4 V3 V2 V1

V5

V9 V8 V7 V6

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Contents Page From Jim Marshall EnglishPreset Store Mode Switch Store ModeIII. Power Amp OverviewMains Input & Fuse Basics Channel OverviewMaster 1 / Master 2 Front Panel OperationPRESENCE, Resonance FX LoopRear Panel Operation FootswitchSerial / Parallel FX Loop Emulated Line OUTTechnical Specification Combos Technical Specification HeadsFollow all instructions and heed all warnings Keep These InstructionsJVM210H / JVM205H front panel Gain Stages JVM 2 Channel Block Diagram