Star Tech Journal

Issue: 1998-October - Vol 20 Issue 8

OCTOBER
1 998
the monitor interior. Should
soldering and paper wastes,
etc., be mixed in the interior,
turn the power off so as not
to cause malfunctioning or
fire hazard.
CONNECTING mE
CRT
PCB
For combining the CRT and
PCB, use the specified part
no. to maintain the status of
adjustments made at the fac-
tory. The anode of the CRT
itself will be accumulatively
charged as time elapses, gen-
erating high-tension voltage
which is very dangerous. The
monitor should be used with
the Chassis, CRT and PCB
assembled. When repair, etc.,
is required at the time of
malfunctioning be sure to
send it in an "as is assembled"
condition. If these are disas-
sembled, what's charged to
said high-tension voltage can
be discharged, causing a haz-
ardous situation. Therefore,
under no circumstances
should it be disassembled.
AND
STAR ..... TECH JOURNAL
damaging the insulated por-
tions so as not to cause an
electric shock and malfunc-
tioning (For the name of
parts, refer to the above fig-
ures).
Caution Cleaning the
CRT Surfaces
When water, and volatile
chemicals such as benzene,
thinner, etc., spill
on the screen sur-
. ~ .
face, it may be
£ l l subject to dam-
CAtrrlON!
age,therefore,do
not use them.
Also, since the surfaces are
susceptible to damage, refrain
from rubbing them with a
hard material or using a
duster.
For the purpose of static pre-
vention, special coating is
applied to the CRT face of
this product. To protect the
coating, pay attention to the
following points. Damaging
the coating film can cause
electric shock to the custom-
ers. For the caution to be
heeded when cleaning, refer
to the Section of Periodic In-
spection Table.
Do not apply or rub with a
hard item ( a rod with pointed
edge, pen, etc.) to or on the
CRT surface.
Avoid applying stickers, seals,
etc. on the CRT face.
Do not remove aluminum
foils from the CRT corners.
Removing the aluminum foils
can cause static prevention
effects to be lowered.
Static prevention coating is
applied to the CRT surfaces.
When cleaning, pay attention
... continued on page 13
STATIC ELECTRICITY
Touching the CRT surface
causes you to slightly feel
electricity. This is because the
CRT surfaces are subject to
static and will not adversely
affect the human body.
INSTALLATION AND REMOVAL
Ensure that the Magnetizer
Coil, FBT (Fly-Back Trans-
former), Anode Lead and
Focus Lead are not posi-
tioned close to the sheet metal
work's edges, etc., and avoid
AJuminum Foil
OCTOBER
STAR . . -TECH JOURNAL
~ Get Two Pinball~ .
.
Tech Reports
and
Save 10% !
.
: PINBALL REPAIR:
: • & MAINTENANCE
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DISCUSSING PINBALL PLAVFIELD
ANGLES AND PROTECTIVE COATINGS
Technical Support
Williams Games
www.pinball.williams.com
Chicago, Illinois
PLAYFIEID SLOPE
Why is 6.5 degree the pre-
ferred playfield angle? Did
it used to be 3 degrees?
maybe that was just the em-
pirically determined angle of
one machine once it was said
"sure felt like it played well."
ANSWER
: Together they cover nearly :
: every pinball made in the :
: coin-op games industry :
: from 1986 to 1996. Modifi- :
: cations, enhancements, :
: troubleshooting, parts :
: sources, replacements and :
: a ton of fixes by easy-to- :
: find symptom/solution for-:
: mat. Both manuals de-:
: signed to lay flat on the :
: bench for ease of viewing. :

1 998
via •

: Prepaid or COD: 609/654-5544. :
: S*TJ, Box 35, Medford, NJ :
: 08055. Fax: 609/654-1441.

Up to a certain point, a
steeper playfield slope makes
for more exciting ball action.
In the early days of pinball,
however, the · mechanical
devices on the playfield were
not up to the task of fighting
that much gravity. A slope of
about 3 degrees struck a good
balance. Once pins started
including more powerful and
robust mechanical assem-
blies, the playfield slope
could be increased for better
ball action, while still allow-
ing the flippers, bumpers,
and so on to send the ball
back up the playfield.
The precise angle of 6.5 was
determined after months of
grueling clinical trials and
focus groups, with biofeed-
back and eye- tracking equip-
ment feeding the real-time
human factors data into
banks of Cray super-comput-
ers, while G PS and NIST
data were simultaneously fac-
tored in to remove any skew-
ing due to time or place. Or
PLAYFIEID PROTECTION
What is DiamondPlate?
Does it really make for a
longer lasting playfield?
ANSWER
Throughout the history of
pinball, manufacturers have
tried to make playfields that
could withstand the rigors of
location play. Anyone who
has seen a frequently played
older machine can attest to
the fact that a steel ball can
do a lot of damage to painted
wood. Playfields in newer
Williams games are far supe-
rior in terms of resisting paint
wear. The coating known as
DiamondPlate was devel-
oped by Williams but specif-
ics can't be discussed due to
the competitive nature of the
pinball business. The best
thing you can do for any pin-
ball playfield is to keep it
clean, and to replace the
ball(s) at the slightest hint of
pitting, rust, or other surface
imperfections on the ball.
That's cheap insurance!

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