Star Tech Journal

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STAR*TECHJdumal
Hantarex MTC9000
Low B+ Voltage
Arachnid 6300
Darts Sw Bounce
Jrunes Beck
Greater Southern Distributing
Atlanta. Georgia
Bob Hade
TBI Games
Rockford. Illinois
PROBLEM
Any suggestions for a low B+ problem. It's 65v
vs. 130v. Have checked the current limiting
resistors and replaced TRIS Horizontal Output
xsistor. TR20 (pass xsistor). and TR19 (driver).
SYMPTOM
If you're running some 6300 darts. one problem
to look out for is the player change switch. If
you're having problems with the game changing
players by itself or trouble with it changing
players when pushed don't overlook the possi-
bility that the micro switch is bad. even though
it works fine for you when you get there.
SYMPTOM
Check the voltage drop across RS 1. better yet is
the B+ doing a slow oscillation?
SOLUTION
If either is true. you probably have a blown
flyback transformer. I have gone the same route
several times this past year and they have all
have been bad flys.
SOLUTION
The problems stem from a red Cherry mi-
croswitch that bounces real bad. Replace and
monitor.
If you take a look at the feedback loop made up
from D 18 and Rl00 you'll see the connection
with the flyback. Pull the dude out and give it a
good visual inspection: I'll bet you'll find a bulge
on it somewhere.
Taito Steering
Wheel Update Kit
Brian Schorr
Land Of Oz
Stockton. California
SUBJECT
Concerning the update bushing kit for Taito
steering wheels. Taito has two bushings that are
held on by clips. the bushings widen up and
allow the gears connected to the opto assy. to
move. causing the car not to respond correctly.
NOTE
I have installed this update and found one
problem ... it screws in and then loosens up.
Loctite this thing with Red Loctite!
Murphy's Law #1112
The longer you wait in line.
the greater the likelihood that
you are standing in the wrong line.