Revox A77

Input Amplifier
Amplificateur d'entrée 1.077. 700
i180 K
R402
402
4
10p C401
!
I M 100K
R 401 R403
— 100p
18 K R407
BC 108
Q 403
10p C407
Tri
47 6,8 K 50p 220
R405 R410 R411
C403 C405
BC179
Q 401
22 K
R404
125p m L2p
C404 7406
i180 K
33 K
R422 R429
3,3pC 422
e Ar[
OpC421
10
!1M 100K
18K R427
Je iAM
R 421 < R423
OOp
42
22K
R424
8
BC 179
421
47
R425
125p
C 424
BC 109
BC 108
Q 423
4
1
2 — M-1 0 V
3 -
4
r --
2 5 Ell
50mV
6 6
10p C427
T [ 1_____ +. 7
R e4 mL 483 1< 027 50 : 220
25
----------,....j+10V1
R431
7 426 BC 109
100K 6,8K 68
R 426 R428 R432
422
9
7 - 1•1-150mV
8 MU
9 1.111-1 OV
10
IIIM
blk
5K log red
5K log
red
blk
- 450p V
2,5mV
2,5mV
8 V
35 mV
! 2,2K 33K 220K
RECORD LEVEL II
RECORD LEVEL I
•
1K
10K
2,2K
33K 220K
150pV
12,5mV
MIC LO
MIC HI
RADIO
AUX
MIC LO
MIC HI
RADIO
I 8 mV I- fl
135 mV AUX
Input Amplifier 1. 077. 700
Amplificateur d'entrée
3.72
Diag. 4