Ampex 351 - Page 53

TAKE-UP MOTOR B502 REWIND MOTOR B503
5 -
Take-up and rewind motor assemblies
6-5
CAPACITOR, MOTOR C512
3.75 MFD
BRAKE TENSION
ADJUSTMENT POINT
FOR LOW SIDE-^
CONTROL CIRCUIT
(Refer to schematic diagram — Tape Transport
Control Circuits)
Located in the control circuit box under 
neath the tape transport are all relays, the ten 
sion adjustment resistors, and electronic com 
ponents such as the capacitors and resistors
shown in the foldout illustration, Tape Trans-
89-0131
89-0144
Issue A
NOTE
The special connector jumper plugs
supplied for receptacles J503S 60
CYCLE AMPLIFIER and J502S RE 
MOTE CONTROL must be plugged
into their receptacles when these ac 
cessory units are not used because
junipers in these plugs complete the
necessary circuits in the system for
proper operation.
V.
- L.'
J
BRAKE TENSION
ADJUSTMENT POINTS
FOR HIGH SIDE
CAPACITOR, MOTOR C513
3.75 MFD
itself tightly around the brake drum as the
brake lever end of the band moves to the right,
increasing braking force. When the drum is
rotating counterclockwise, the process is re 
versed, causing the band to tend to pull away
from the drum, decreasing the braking force.
The ratio of the braking force in one direc 
tion to the braking force in the other — the
brake differential — is approximately two to
one on this equipment.
In all modes of operation, the greater brak 
ing force always acts on the trailing turntable,
maintaining the proper tape tension as the sys 
tem is stopped.
port Control Circuits, with the exception of the
three motor starting capacitors, the capstan
solenoid, the brake solenoids and the safety
microswitch (which arc mounted adjacent to
the assemblies they serve).
On the outside of the control circuit box
receptacles are available for cables from the
drive motor, supply motor, take-up motor and
control cluster. Female receptacles and plugs
(cables not supplied) are also available for
interconnecting the tape transport and acces 
sory units such as remote control panels and a
precision frequency source when furnished.
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