Revox A77

3.7. Removal of Capstan Motor
— Remove output amplifiers I if present 1.
— Disconnect capstan- motor and pick-up cables; connec-
tions are on control card ( fig. 3.7 — 9 ).
Note:
For improved signal to noise performance, the capstan
motor connections may be reversed on some recorders in
the following manner: E3 = gry, E4 = yel, E5 = gm.
Carefully note wire colors before disassembling.
— Undo cable clamps A ( fig. 3.7 — 9 )•
— Remove cover and monitor panels per 3.2. and 3.3.
— Unscrew motor fasteners B ( fig. 3.7 — 10) on headblock.
The other screws on headblock shall not be touched as
they retain the headblock itself.
— Remove capstan motor carefully downward. Guard abso-
lutely against bumping ( axis run- out is better than
.001 mm = 40 micro - inch ! I
3.8. Removal of Control Board
— Remove cover and front panels per 3.2. and 3.3.
— Undo screws A( fig. 3.8-11). Pull control board down -
ward.
— Remove connectors as needed.
Photoelectric
End- of- Tape Switch
Fig. 3.8-11
8
gm n FH1
gm FH2
vio DF4
yel DF2
A
Fig. 3.7-9
Fig . 3.7-10
blu
Left Reel Motor
c
a. —.
.0 . 0
1J14 JuUu 1
Capstan Pick-up
Motor
e
Remote Control
gry FG8
wht FG9
blk FG10
vio FG7
u
IJ