Revox A77 Service Manual

gmn
RECORD
Oscillator
1.077.712
Oscillateur
7.70
red
e
L703
2 - track
L 704 4
4- track
0 703
BC 440
C 708
m i l. 470p
3
•
0
704
BC 140
L 705
R 715
18k
1 712
750p
C 710 R 720 R 716
.__H 50k 1 3k
220 p R 721 R 717
C 709
3,3 n
10
Position " Record - Stereo", voltages measured against ground ( OV)
Position " enregistrement stéréo", tensions par rapport à la masse ( OV)
Test points
Points de mesure
2 - Track
2 - pistes
4 - Track
4 pistes
0
approx. 22V/120 kHz
approx. 18V/120 kHz
CD
approx. 44V/120 kHz
approx. 36V/120 kHz
® +
®
500 mV/120 kHz
50 mV/ 1 kHz*
400 mV/120 kHz
40 mV/ 1 kHz*
* AF - Test ( oscillator pulled out), full modulation
* mesure BF ( oscillateur retiré), modulation à 0 dB
0 V
wht
CHANNEL I
- I-
i
I
CHANNEL II
i
1,2k
brn
I
o 1
blu
brn
org
Test values 0 and ® depend on type and speed of tape; they are to be considered nominal.
Les tensions aux points 0
indiquées sont nominales.
t
diffèrent suivant le type et la vitesse de la bande; les valeurs
Oscillator
Oscillateur
I
L601
1. 077. 712
Diag. 6a

Revox A77 Specifications

General

Wow and Flutter	0.08% (7 1⁄2 ips)
Frequency Response	30Hz to 20kHz (7 1⁄2 ips)
Signal to Noise Ratio	60dB
Type	Reel-to-Reel Tape Deck
Track System	4-track, 2-channel stereo/monaural
Reel Size	Up to 10.5 inch reel
Motor	2 x reel, 1 x capstan
Inputs	Mic, Line
Outputs	Line
Tape Speed	3 3⁄4 and 7 1⁄2 ips