Arachnid 1000 Series Information page 35

ARACHNID, INC.
2500 North Main Street
Rockford, Illinois
Changes for new Motherboard by P&P Design
Re:
to I.C. pads.
Plated through
diameter of hole used.
Should have plated through hole on connector edges.
Capacitors
ceramic, paper.
No holes
No holes for C30
R144 is etched to -5 Volt,
(7)
Use single etch run from junction of pins 18 & 19 of I.C. #23 to
(8)
junction of R4
collector is open, L7 * L8 are tied to Q35's
to Vss should be no connection.
set of holes too high.
Mounting eyelets
much too close to each other,
disk capacitor, much
that we use.
R58 to R70 even,
eyelets are set too close to LED - seven segment displays, had to
mount resistors
front of board.
Install 220 ohm resistor,
(13)
c29, 33, 41 eyelets are set for disks, these capacitors are
electrolytic,
Q42 is underneath
when folded
61103
on backside of Motherboard (blue) is much too close
holes, parallel etch work too close together for
Cl
for Cl5 (schematic),
(schematic),
Move R129 from pin 6 to pin 5.
around I.C.
too
eyelets are to close together for 2 watt resistors,
on backside
therefore eyelets are set too close together.
down against
November 30, 1978
holes are set for disc
electrolytic.
electrolytic.
schematic calls for pull-up to Vss.
Notice that Q51 is mounted one
C34 eyelets appear to be set for a
close for the electrolytic
of board, they belong on the topside -
move Q42 to left encugh to clear L23
board.
base.
ohm pull-up
25 microfarad
in series.