Revox A77

INPUT
AMPLIFIER MPX-FILTER
01 02
011 012
CALIBRATION
to CH II OSCILLATOR
CALIBRATION
ON— OFF
LOW- PASS- FILTER
04
VU- OUT
08
MPX.—FILTER ON- OFF
to CH II
HIGH-PASS
DYNAMIC- FILTER
05
AMPLIFIER
06 07
LIMITER
D2 D3
MAIN SIGNAL
RECTIFIER BIAS FREQ.
INTEGRATOR FILTER
AMPLIFIER LOW PASS FILTER AMPLIFIER HIGH-PASS
DYNAMIC- FILTER
01 02 03 05
INPUT 0--
VU-AMP.INP.
VU- OUTPUT
to VU- METER °
09
VU- AMPLIFIER
VU- OUT
AMPLIFIER
DOLBY ON- OFF AMPLIFIER
03
LIMITER DOLBY- ON- OFF
06 07 D2 D3
TP 0
08
04
09
..:•:•:•: "
RECTIFIER
INTEGRATOR
BIAS FREQ.
FILTER
NEG. FEEDBACK/DIFFERENTIAL SIGNAL
DOLBY ON- OFF
RECORD PROCESSOR
O OUTPUT
O DOLBY ON- OFF
PLAYBACK PROCESSOR
Block Diagram A77 DOLBY