Fostex G24S Service Manual page 21

4.2.7.2 Centering the agnet FG and the Print Coil
This procedure is done at the factory and must not be done at routine maintenance and
servicing.
When wow and flutter is extremely bad, it could be that the FG magnet and print coil are
off center and therefore should be adjusted as follows:
1) Thread the Speed Tape (3 KHz or 3150Hz) on the transport.
2) Loosen screws A and B just enough to allow shifting the PCB print coil.
3) Connect a wow and flutter meter to the reproduce output.
4) Put the transport in the PLAY mode and while reading the wow and flutter meter, slowly
shift the PCB print coil to search for least amount of wow and flutter.
5) Carefully tighten screws A and B while checking the wow and flutter meters ' best reading.
CAP TAN
6) It is considerd as a normal condition if the value of the WOW & FLUTTER is measured
as ±0.05% peak WTD (IEC/ASI) or less.
4.2.7.3 Adjusting the PITCH CON. Oscillator
1) Depress |RCL| (recall) button and then [PITCH| button on the Controller to see the
" PITCH " display.
2) Turn the FRONT/REAR sw on the rear panel to REAR, (at this condition, PITCH CON.
VR. on the Controller is not in operative condition.
3) Depress the [PITCH| button again and then PITCH LED starts blinking. In this condition,
confirm that even if rotating the PITCH CON. KNOB, the PITCH value on the display
never varies.
4) Adjust R87 on the DD CAPSTAN PCB assy so that the " PITCH " value on the display
shows " 0.0 " ( " -0.0 " is no good).