
3-34
Section 3
— Installing The Editor
J20, 21 & J22 - Floppy Drive Selection
These three 2-pin jumpers are used to match the requirements of the
floppy disk drive installed. Matching is per the following jumper
placements:
J20 Jumper on, the MOTOR LINE signal to the drive connector(s) is
low.
Jumper off, the MOTOR LINE signal to the drive connector(s) is
high
J21 Jumper on, compensation value is 187 nS
Jumper off, compensation value is 125 nS
J22 Jumper on, enables the DISK CHANGE drive feature.
Jumper off, disables the DISK CHANGE drive feature.
J23 - EVENT Signal Source Selection
This 3-pin jumper is used to select the source of the EVENT signal to the
microprocessor.
1-2 selects house sync input as the EVENT clock
2-3 selects the on-board sync as the EVENT clock (see J11)
This concludes Installation Troubleshooting. If after performing all the
checks described here, your Editing System is not working, refer to the
Troubleshooting and Diagnostics section of the Service Information
Manual.
SPECIAL NOTE: At the completion of this Installation Instructions
Manual, it is recommended that you go through the Super Edit Tutorial
Set.