Fostex B-16 - Page 20

Fig. 4.7
___________ I' ■ 1 _____
----------------------------------------------------------------------- 1
1
1 _________
--------------------- ----------------- ---------- — ------- — ■
_ 1 «'0
6) Display LED
D36 through D40 on the function/display PCB are the count display LED and
are connected to J2 and J3 on the system control PCB by a flat cable. Dot
D38 is lit as the dividing point between the Minute and Second LED's.
4.7 Reel servo
In this transport the reel servo circuit functions to apply constant tape
tension during PLAY or EDIT modes, and maintain constant tape speed during
FAST winding and ZERO RTN modes.
1) Tension control circuit
Tape tension is detected by the photo-interrupter whose output is propor 
tionate to movement of the tension arm and the output response is as shorn
in Fig. 4.8.