Fostex B-16 - Page 32

5.3 Reel Servo Adjustment
1. Necessary equipment
Oscilloscope
Tape tension gauge Tentel Model T2-H20-ML
Blank tape 1/2" width, Ampex 456 or Scotch 226
2. Adjusting procedure
2-1 Tension sensor adjustment
1) Swing out the System Control PCB.
2) Connect an oscilloscope or voltmeter to the System Control PCB test
point 2 (Takeup side) or test point 3 (Supply side) to measure the
voltage.
3) Loosen screw A, on the Tension Sensor mounting plate (Fig. 5.7), for
the takeup side.
4) Make sure the tension arm is at its lowest point.
5) Move the tension sensor until the test point voltage is 8V, ±0.2V (14V,
±0.2V when changed to the NEW Tension Arm Ass'y), then tighten screw A.
Check the voltage again after tightening this screw.
6) Loosen screw B, for the supply side tension sensor, and follow the above
procedures 2) through 5) while checking the voltage at test point 3.
supply take up
Fig. 5.7
Tape tension adjustment (Refer to Fig. 5.8 for connector and pot locations)
1) Load a 10-1/2 inch blank tape on the transport and wind tape so that both
supply and takeup reels hold approximately the same amount of tape.
2) Pull out connectors Jll and J12, on the System Control PCB, and plug J12
into J29.
4-1984 FOSTEX CORP. B2W 0881 00