Vector 4 - Page 132

VECTOR 4
TECHNICAL INFORMATION
PART III - TESTS AND ADJUSTMENTS
The following section covers three separate tests and adjustments
available for the Veector 4: VCO center frequency for the Disk
Controller board, CRT adjustment, and cat's-eye alignment for
floppy drives. Although much of this information can be found in
other Vector Graphic manuals, all specifications are included here
- for specific usage in the Vector 4.
All three sections make the following assumptions regarding the
condition of the Vector 4 being adjusted, and the skill level of the
technician involved:
o the Vector 4 SBC has been determined, either through
Part V (Troubleshooting) of this manual or by other
means, to require one of these adjustments.
0 the technician is familiar with the use of an oscilloscope,
and can interpret timing diagrams and wave forms.
0 the cover has been removed from the Vector 4 for access
to the components.
CAUTION
The console cover is an integral part of the cooling system of the Vector
4, If the cover will be removed for service for a period of one hour or
longer, remove hard disk drive to allow proper air circulation.
Since this part of the manual describes procedures for checking and
correcting various conditions in the Vector 4 SBC, the format is
slightly different from the previous parts of the manual. Each
section (noted by the Roman numerals I, II, and III) is broken down
into getivities (noted by the format 1.1, 1.2, et cetera) and, in some
cases, subactivities (noted by the format 1.2.1, 1.2.2, et cetera). Be
sure to perform each step in each activity or subactivity before
going on to the next. If you come to an END OF ACTIVITY
marker, that means that the procedure for checking or correcting
the given problem is completed at that point, and that any activities
between that point and the next section would be reached through
some combination of events observed during an earlier test.
09-01-82 7200-0001 oI A-1