Mesa/Boogie Heartbreaker

5AR4
12AX7
REAR OF CHASSIS
GRAY
REVERB
WHITE
(Each 12AX7 contains two separate Triodes)
V 7 V 6 V 5 V 4 V 3 V 2 V 1
B A
B A
B A
B A
B A
B A
B A
Partial View Of Chassis
6L6's (stock) EL-34's or 6V6's (TWEED Only)
PAGE 15
Description of Tube Functions
V1A=Ch.1 Input Stage (LO Gain) V4A= Ch.2 Third Lead Stage
Ch.1 Second Lead Stage (HI Gain) (Tone Recovery Stage)
V1B= Ch.1 First Lead Stage (HI Gain) V4B= Ch.2 Fourth Lead Stage
V2A= Ch.1 Third Gain Stage V5= Phase Inverter
(Tone Recovery Stage) V6A= Reverb Return
V2B= Ch.1 Forth Gain Stage V6B= Reverb Send / Driver
V3A= Ch. 2 Second Lead Stage (HI Gain) V7A= FX Return
V3B= Ch.2 Input Stage (LO Gain) V7B= FX Send