Star Tech Journal

Issue: 1996-March - Vol 18 Issue 1

March 1996
... continued from page 16
Flat wrenches- both box end and open end or com-
bination types. A few sizes are handy for things
like tightening the jam nut on a pinball leveling
foot, or tightening up the legs.
STAR*TEcH
CID
Journal
4 Design Improvements to
the Industry Standard
The "Quick Release"
Ticket Dispenser
I keep both SAE and metric "ignition wrench" sets
in my kit. They are collections of small size flat
wrenches. These little wrenches are endlessly use-
ful. I like the little 3/8" one for the nut on Williams
flipper cranks when I change a broken link. Sears
sells nice little sets.
Improves serviceability
& reduces
maintenance
Crescent wrenches ( adjustable flat wrenches) are also
handy. Years ago around our shop we used to call
the crescent wrench our "metric set." Consider a
3" one as a clumsy alternative to the ignition
wrenches. I also carry a 6" to 8" crescent. I use a
12" crescent to turn the hole cutter screw when
doing panels for conversions. It stays in the other
tool kit though. It's a big ole heavy thing.
Pliers - in addition to needle nose, diagonal cutters
("dikes"), combination or slip -joint, you might
consider duck billed pliers (flat and non-serrated),
vise-grips, small flush cutters (to fit between and
cut legs on ICs), and a good crimp tool.
"Quick Release" face plate
Dynamic, new design allows the
ticket dispenser to '" quickly release '"
from it's face plate on your cabinet
or ticket door, no tools needed.
Easily replace one dispenser with
another in just seconds. No tools
necessary! The new face plate
Be good to your tools. If you spend the money
for a nice pair of flush cutters, promise yourself
you will only use them on component leads and
soft copper wires.
retrofits any existing Deltronic
Labs machine.
2
The extended, durable ticket guide
prevents curled tickets from catching.
Foolproof braking system
Next Issue:
Our impressive new braking system
eliminates brake slippage, _allowing
foolproof, accurate dispensing.
We continue to outline the tools, special
items, parts and supplies recommended
for accomplishing game service tasks
more efficiently.
Topics next up include:
Drill Motor and Bits, Files, Wire Stripper, Pin
Punches, Taps & Dies, Soldering Irons &
Guns, Multi meter, Logic Probe and Mis-
cellaneous Small Tools.
Bottom METAL ticket guide
Optical sensor dust cover
Eliminates dust accumulation and
increases accuracy of the ticket count.
IIJj.
Another quality product from Delfronic Labs .. .
/he mdufflY leade, m lick el m,pen,eo
De/Ironic Labs, inc.
120 Liberty Lane, Chalfont, PA 18914 • 215-997-7753
FAX # 215-997-9506
STAR*TECH
Journal
CID
March 1996
... . . ... . . ... .. . . .. . . . . . . . . . . . . . . .. . ... . .. . . . . .
SEGA PINBALL WHm- STAR SYSTEM
1/0 POWER DRIVER BOARD THEORY OF OPERATION
(PART ONE)
TEAM SEGA
Joe Blackwell, Eric Winston,Jay Alfer, Ted Kilpin
Sega Pinball, Melrose Park, Illinois
5V SUPPLY
An AC voltage of approximately
9V comes into the board at U 17-
( 1-4)] this AC voltage is then full-
wave rectified by bridge BRDG
21 and filtered by capacitor
C203.
The resulting voltage is 11 VD C
which is inserted into a linear
voltage regulator for the output
of 5VDC. This 5V regulated volt-
age can be adjusted by potenti-
ometer Rl 16 the voltage should
be set to 5.00V.
Besides powering the 1/0 Board
the regulated 5 volts supplies
power to the CPU & Sound
Board Gas Plasma Display and
Plasma Controller Board. Power
for these devices comes off the
1/0 Board on U16-(4-8)].
+5 + 12 +50V + 18V +20V
LED INDICATORS:
These DC voltages are derived
on the 1/0 board by rectification
and filtering. Each has a LED
indicating that power is being
supplied to each of these voltage
sources. The -12V supply comes
from the same transformer wind-
ing as the + 12V thus it does not
have a LED indicator.
** Note - The +50V & +20V power sources are turned off by the
interlock switches when the coin door is open.
LED
Supply Voltage
L2
L201
L203
L200
L202
Bridge Rectifier
+5V
+sov
+12V
+20V
+18V
GENERAL ILLUMINATION (G.I.):
J15 has 6VAC switched on and
off by a relay on the 1/0 Board.
The relay is controlled by Q200
which supplies power to the 24 V
coil winding to activate the relay.
There are 4 taps on J 15 each
fused at SA for this 6VAC source.
The traces have all been beefed
up to prevent overheating and
board damage which can happen
in older machines.
BRDG-21
BRDG-1
BRDG-3
BRDG-2
BRDG-20
Fuses
F23
F6,F20,F21
F8,F9
F7
F22
TusT PmNTss:
Test Points TPLl(FET-High Cur-
rent) & TPL3(TIP-Low Current)
These are wire loop test points
connected to 5VD C through
pull-up resistors R300 and R302.
They can be used to trigger the
high current and low current
drive transistors by using a
jumper wire to connect the test
point to the base or gate resistor
in that particular drive circuit.
NEXT MONTH:
We will take a look at Address decoding and reset circuitry.
I
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