August 2014



August 2014
New! Slot Tech Training now available
in South Dakota, Louisiana
Slot Tech Magazine
Page 3-Editorial
Page 4-Aristocrat Topper Schematic Diagram, PCB
Layout and Parts List
Page 8-MK7 UNI-400-1 Power Supply ICE2B265G
Page 9-Regional Slot Tech Training
Page 12-Slot Tech Training at Lode Star Casino
Page 14-IGT Communications Board Test Fixture
Page 20-HAKKO Induction Soldering Unit
Page 22-Subscriptions
Randy Fromm
ear Friends of Slot Tech Magazine,
As a follow-up to last month’s article on the old,
Aristocrat topper, Glenn Allen has provided the data
that I was unable to publish at press time, namely a
schematic diagram, board layout and parts list. See
page four. Thanks, Glenn.
A recent poll on the Slot Tech Forum was overwhelmingly in favor of a series of articles on the
Integrated Circuits we use in gaming. Since we’ve
been covering Aristocrat power supplies lately, we’ll
start with the ICE2B265G as used in the MK7 UNI400-1 power supply. Turn to page eight.
Herschel Peeler has put together a nifty test fixture
for IGT Comm boards. It’s educational, even if you
never build the thing. Turn to page 14.
See you at the casino.
Publisher-Slot Tech Magazine
Slot Tech Magazine is an
official publication of the
Randy Fromm's
Slot Tech Magazine
Randy Fromm
Technical Writers
Glenn Allen, James Borg,
Jason Czito, Vic
Fortenbach, Henry Kollar,
Chuck Lentine, Kevin
Noble, Pat Porath
Slot Tech Magazine is published
monthly by
Slot Tech Magazine
401 W. Lexington #777
El Cajon, CA 92022
tel.619.838.7111 fax.619.315.0410
e-mail [email protected]
Visit the website at
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Subscribe online at
Copyright 2014 under the Universal
Copyright Convention. All rights reserved.
Slot Tech Classes
Shreveport, LA
August 25-28, 2014
September 22-25, 2014
Pinetop, AZ
October 21-24, 2014
Classes open to all slot techs
Slot Tech Feature Article
Aristocrat Topper Schematic Diagram,
PCB Layout and Parts List
By Glenn Allen
Editor’s Note: This is a
followup to the Aristo
Topper repair article we
ran last month. Thanks,
Page 4
C1 .1uf 50V
C2 .1uf 100V
C3 .1uf 100V
C4 .1uf 100V
C5 100uf 16V
C6 1uf 50V
C7 .01uf 50V
C8 .1uf
C9 470uf 35V
C10 .1uf
R1 1K0 1/4W
R2 470R
R3 22K
R4 732R
R5 732R
R6 732R
R7 732R
R8 243R
R9 243R
R10 243R
R11 243R
R12 0
R13 0
R14 0
R15 0
LED Chaser Parts List
Slot Tech Magazine
VR1 TO92
VR2 TO220 LM317
VR3 TO220 LM317
VR4 TO220 LM317
VR5 TO220 LM317
F12A 250 FAST
August 2014
July 2014
Slot Tech Magazine
Page 5
This is the LED chaser driver PCB
Page 6
Slot Tech Magazine
August 2014
July 2014
Slot Tech Magazine
Page 7
Slot Tech Feature Article
MK7 UNI-400-1 Power Supply
By Herschel Peeler
he ICE2B265 is
obsolete so
troubleshooting this
guy closely is important.
DigiKey and Mouser list it
but do not carry stock,
listing it as obsolete. There
are some Chinese
distributors that still have
This is the switching
regulator for the 24 Volt
side of the power supply. It
only has a few pins to look
at so troubleshooting isn’t
The 2B265 comes in a
variety of packages so if you
are purchasing one, be
careful of what you buy.
Pinout (DIP version)
1 – Soft Start. It may just
have a capacitor to ground,
100 nF is typical.
2 – Feedback. This is
usually an optoisolator from
the output circuit that
monitors the output
voltage. As the output
voltage goes up, this voltage
goes down. It should read
about 1.5 V DC with a
meter but it is best read
Page 8
with a ‘scope to be a signal
around a 0.8 Volts level.
3 – Current Sense. Source
pin of the output MOSFET.
This usually has a low value
resistor to ground, about 1
Ohm is typical. DC voltage
measured will be about 1
Volt but not being a steady
DC, level readings may
4 – Drain output
5 – Drain output. These
should be a high DC
voltage if you read it with a
meter on DC. You may get
some reading with a meter
on AC but unless you have
a really good meter that can
read AC at 66 KHz the
actual reading may not be
meaningful. Best read with
a scope. CAREFULLY.
6 – (not used, may not even
be on the chip)
7 – Vcc. To start up, the
2B265 this needs to be
above 13.5 Volts but once
started, it can be lower.
Below eight volts it should
drop out. It will
tolerate about
20 Volts but at
about 16 Volts,
it senses it as an
overvoltage Vcc
and shuts down
the PWM.
Typically reads
around 12 Volts.
8 – Ground (AC
line referenced)
Slot Tech Magazine
There are two schematics.
Design 191 is a simplified
variation of the UNI-400 24
Volt circuit for an example
of the 2B265 at work.
Design 192 shows a detail
of the inputs and outputs
for troubleshooting
Design 191
SETEC has added a circuit
(Q9 and D15). Apparently
the Vcc overvoltage level
wasn’t low enough. When
Vcc gets to about 15 Volts,
Q9 turns on pulling the
SoftStart line high. You
should not see a voltage
here higher than 5.6 Volts.
We will cover that in
following paragraphs.
Other than that, operation
is right out of the data
sheet for the ICE2B265.
You can download that from
most data sheet sources.
My favorite is
August 2014
Regional Slot Tech Training
Attend or Sponsor a Class Near You!
Classes Available:
Shreveport, LA August 25-28 2014 Eldorado Casino
Aruba September 22-25 2014 Aruba Marriott Resort & Stellaris Casino
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This is a “fast-track” class for slot
techs who want to learn the
quick and easy way to fix monitors and power supplies without
having to learn a lot of electronic
theory or mathematics.
If you are interested in sponsoring a regional class at
your property, please contact
Randy Fromm for details.
ince 2001, Slot Tech Magazine has been holding slot tech
training classes at casinos across the USA. These classes
have mostly been held at larger properties with a dozen or
more slot techs from their own slot department attending the class.
In order to serve our smaller cainos (with, perhaps, just a few
techs) we are now holding regional classes that are open to all slot
techs that wish to attend.
This is the full, four-day class that covers power supply repair and
LCD monitor repair, down to the component level.
To Enroll: Download the enrollment form at
Class Schedule 9:00am-4pm Daily
Day 1-Beginning Electronics for
Slot Machine Technicians
This segment assumes that you have
no previous electronics training and
takes you through a simple, NO MATH
look at electronic components, electronic circuits, schematic diagrams and
Day 3-Morning Session-Soldering
Good soldering technique takes practice but there are some tricks that can
really help speed things along. During
this segment, each student will be provided with their own soldering supplies
and a fun project kit they will assemble.
This equipment will be theirs to keep.
Using a Digital Multimeter
The DMM is the single most important
piece of test equipment you can use.
Day 3-Afternoon Session-Power Supplies (continues Thursday)
This module covers all types of power
supplies, including linear power supplies
and the Switched-Mode Power Supply
(SMPS) found in virtually everything in
a modern casino.
Electronic Components
All of the individual components used
in gaming machines are introduced.
Students learn how to test them for
proper operation.
Day 2-Diodes, Transistors & Other
Hands-on Transistor Testing Lab
This part of the school takes a look at
all of the different types of semiconductors commonly seen in gaming machines. We'll take a look at the operation of each component, along with testing procedures to determine if the part
is good or bad.
July 2014
Day 4-Afternoon Session-LCD Monitor Repair
LCD Monitor repair is generally pretty
easy thanks to their modular design.
This segment covers the theory of operation of LCD monitors. There will be a
presentation on component-level repair
techniques, CCFL testing and replacement and using LED strips as backlights.
Includes free CCFL tester!
Slot Tech Magazine
Cost of the Program
Tuition is $795/person
Digital Multimeter
Soldering iron, tools and soldering
Sample components
Soldering Instruction Kit
Students are responsible for their
own meals and lodging.
If you’re interested, please contact
Randy Fromm right away. It’s first-come,
first-served and there is a very limited
number of places available in each
Randy Fromm
Slot Tech Magazine
401 W. Lexington Ave. #777
El Cajon, CA 92022
You can fax a PO to 619.315.0410 and
we’ll invoice you. Be sure to include the
student’s name.
Page 9
Vcc obtains its start up
from the +400 Volt line.
When it reaches
approximately 100 Volts,
Vcc becomes high enough
for the 2B265 to start up so
most any good +400 line
voltage should get this
circuit started. Once the
2B265 is going, one
secondary of T3 provides
Vcc for the chip. The Drain
output should start
running at about 66 KHz.
The Current Sense line has
a low resistance to ground.
Current flowing through
this resistor indicates the
level of current through the
output. The UNI-400 has
two resistors in parallel (2.2
Ohm and 2.7 Ohm, giving
about 1.2 Ohms).
Feedback Input
This is usually the output
of an optoisolator whose
LED is monitoring the 24
Volt line (or whatever
output the power supply
has). As the 24 V line goes
up to 24 V, the LED starts
conducting and the voltage
at the Feedback input
decreases. Again, this
voltage changes during
operation but with a DC
meter you
should see about
one volt here.
Design 192
The SoftStart line has an
internal resistor that
charges up the capacitor on
the line. A 5.6 Volt Zener
on this line limits the
Voltage so you should not
see more than 5.6 Volts on
this pin. As long as Vcc is
below 15 Volts, Q9 should
be off and doing nothing to
influence the circuit.
If the voltage on this pin is
always low, C59 may be bad
or the 2B265 is bad. About
five volts is typical as I
remember. On power up,
when this voltage gets
above 4.0 Volts, the 2B265
should start up. Above 5.3
Volts indicates an error and
the 2B265 shuts down.
Inside the 2B265 there is a
transistor tied to this line to
pull it low on internal
errors. Over temp or other
errors pull this line low, so
0 V here may indicate a bad
This should be a changing
DC level riding on about a
0.8 Volt level at 66 KHz,
following the output of the
power supply. As the
output voltage decreases,
the phototransistor
decreases conduction and
the result should be a
wider output pulse, raising
the output voltage back up.
If the output voltage is too
low the voltage on this pin
may rise above 4.8 Volts
and trigger an error,
shutting down the 2B265
so you should not see a
voltage here higher than
4.8 Volts.
Happy (and careful)
troubleshooting. This
circuit can bite.
- Herschel Peeler
[email protected]
Design 191
This is normally
just a capacitor
to ground that
delays power on
by a little while.
Page 10
Slot Tech Magazine
August 2014
Design 192
July 2014
Slot Tech Magazine
Page 11
Slot Tech Event-Slot Tech Class at Lode Star Casino
his was the first of my
new, regional slot
tech classes. It was
held July 15-18, 2014 at
the Lode Star Casino in Ft.
Thompson, SD.
This was my “normal,” fourday class that is geared for
slot techs with no previous
electronics training or
experience. We cover all the
knowledge and skills required for the vast majority
of the common repairs we
face in the casino industry.
Beginning with a “no-math”
Nolan Brave Heart Bull and Randy
Fromm. Is it weird to publish a
picture of yourself in your own
magazine? I suppose if it’s OK
with Oprah . . .
Below: I just had to try out the
“panorama” setting on my new
Samsung Galaxy phone. This is
one of our “hands-on” labs.
Page 12
(l-r) Forrest American Horse, Jeff Millard, Tashina McBride, Nolan Brave
Heart Bull, Doreece Kennedy, Michael Scott, Rosita Medicine Crow and
Aimee Ziegler.
Slot Tech Magazine
August 2014
dge and skills refor the vast majority
ommon repairs we
the casino industry.
ing with a “no-math”
look at basic electronics, students progressed through the use of the digital
multimeter and capacitor ESR meter to
test all of the discrete components. Next
came soldering. Students learned about
component removal and replacement and
had the opportunity to build a soldering
ina McBride, Nolan
kit that used all of the compoRosita Medicine
nents we just learned about. Next, it was
on to power supplies and LCD monitors
July 2014
where we took a look at how these units
operate and, more importantly, how they
fail and what to look for when performing
repairs. I demonstrated LED replacements
for CCFL backlights.
If you are interested in sponsoring a class
at your property, please contact Randy
Fromm to discuss your requirements.-STM
Slot Tech Magazine
Page 13
Slot Tech Feature Article
IGT Communications Board
Test Fixture
By Herschel Peeler
his is the four, five or
six channel Comm
Board in the distribution box of 960 series
games, both Game King
and S-2000. It comes in
many variations and part
numbers. This test fixture
tests all of them I have
found so far. The board has
the possibility of three or
four wired channels and
one or two fiber optic channels. The board can be
powered from any of three
sources. The test fixture
covers all of them.
No single game uses all the
possibilities so testing the
board in one game will not
necessarily prove it will
work in another game. The
test fixture and this procedure are also educational if
you are vague on RS-232,
RS-485, current loops or
fiber optic systems.
supply in the Distribution
box through a 2-pin power
connector. Some more
recent designs have been
powered by +13 Volts coming in over the 26-pin ribbon cable. The test fixture
has all possibilities here
The Board in General
There are many variations
and part numbers for this
board so schematics will
vary, but we can see some
similarities in designs. The
game interface is +13 V and
ground digital signals so
switch inputs are simply
switches from +13 Volt or
ground. 4504 Voltage Level
Converters change these to
+5 and ground for the rest
of the circuitry.
The RS485 interface is
usually an LTC491 or
MAX491. The RS-232 interface chips provide their own
+V and –V for the RS32
line. The boards that run
off of AC have an on-board
regulator that drops the
rectified voltage (“+13 V”
line on the board) down to
+5 V.
No parts on these boards
are proprietary. All parts
are available over-thecounter.
The 960-series games have
eight communication channels (1 through 8). Up to six
of these come into the
Communications Board as
channels “a” through “h”.
Older boards were powered
by AC from a transformer in
the distribution box that
put out about 15 Volts,
center tapped, through a 3pin connector. The next
generation was powered by
five Volts from a power
Page 14
Slot Tech Magazine
August 2014
Channel “a” is usually primary SAS and is
an RS-485 port with MODEM-type handshaking (DTR and DCD). In boards with
dge and skills
tworefiber optic ports, “a” is the second fiber
for the vastoptic
port. Channel “c” is an RS-232 port
ommon repairs
with flow control (RTS and CTS). Channel
is an optional second RS-232 port not
the casino “f”
on most boards. Channel “g” is the
ing with a “no-math”
progressive (current loop) port. Channel
“h” is the standard fiber optic port. Each
will be covered in more detail.
The game has a Communications Analyzer
built into the diagnostics that is very useful for troubleshooting. The best application of this requires a loopback on the
channel you are testing. This allows the
output of that channel to talk to itself
testing all of the game circuitry. These
loopbacks are required for the test fixture.
The Test Fixture
The test fixture is not complicated. It is
basically switches and lights that simulate
the game inputs and outputs through the
26-pin ribbon cable.
Channel 1
Referred to as Channel “a” in the board
this is usually Channel 1 of
the game and is primary SAS. This is an
RS-485 port on most boards. On boards
with a second fiber optic port, this second
port is “a.” On the RS-485
configuration, we have
Direction Control (DIR),
Data (TxDa and RxDa) and
MODEM Control (DTR and
DCD). TxDa is Transmit
Data on Channel “a” which
is data coming from the
game MPU out to some
system. This goes into the
external system as its
RxDa. RxDa is Receive Data
on Channel “a” which is
data coming into the game
from some external system.
This comes from the external system’s TxDa output.
DTR is Data Terminal
Ready. This is a signal
ina McBride, Nolan Brave
Rosita Medicine Crow and
July 2014
ADVERTISEMENT - Power Supply Repair
generated by the MPU, telling an external
system it is on-line and ready for operation. This eventually goes to the external
system as a DCD signal. DCD is Data
Carrier Detected which means the external system is alive and on-line. This comes
from the external system’s DTR output so
testing this channel requires a loopback
that ties TxDa to RxDa and DTR to DCD,
allowing the port to talk to itself. RS-485 is
a differential signal standard so there is a
“+” and a “-“ side to each signal. Setting a
switch sends the signal. The result coming
back lights an LED. This is the 10-pin
connector, J81.
Slot Tech Magazine
Page 15
On some designs with a
second fiber optic port,
Channel 1 may be this
second fiber optic port.
Channel 3
Referred to as Channel “c”
in the schematics, this is
an RS-232 port with Flow
Control, RTS and CTS.
TxDc and RxDc are the
transmit and receive data.
RTS is Request to Send.
This output is telling the
external system the game
has information ready to
send. CTS is Clear to Send.
This is a signal from the
external system telling the
game it is okay to send the
information. In a system
switch there may only be
one processor but many
communication channels.
Since the processor can
only talk to one channel at
a time, it organizes itself
using these RTS and CTS
Page 16
handshaking signals. This
is the 5-pin connector, J82.
Channel 6
Referred to as Channel “f”
in the schematics, this is
an optional second RS-232
port. No handshaking signals are provided. Flow
Control is accomplished by
ASCII control codes (X-ON
and X-OFF). Only a simple
loopback between TxDf and
RxDf is required. This is a
7-pin connector, J5, not
found on all boards.
Channel 7
Referred to as Channel “g”
in the schematics, this is
the typical Progressive
output to older progressive
sign systems. This is a
current loop design. The
inputs and outputs are
opto-isolated. Again Prog
Out is simply tied to Prog In
Slot Tech Magazine
but we also need to supply
power to the external aide
of these circuits. This is the
6-pin connector on the
board, J85.
Channel 8
Referred to as Channel “h,”
we have TxDh and RxDh.
This is typically connected
to the fiber optic Data Collection System, WAP ((Wide
Area Progressive), CVT or
location safe system. The
loopback required is a short
section of fiber optic cable.
On many single fiber optic
port designs there is a
second fiber optic output
that echoes what is transmitted on the other channel. Worth noting here,
there is a jumper “E1” that
disables transmitting on
the fiber optic channel
while something is being
received. This jumper must
be removed for the
August 2014
loopback test. An LED on the board lights
when data is being sent out the fiber optic
dge and skills refor the vastSome
boards have no fiber optic connecommon repairs
tors at all. The board LED still lights but
is nowhere for the signal to go and
the casino there
ing with a “no-math” to be received.
Testing the Board
Connect the loopbacks as required for the
board. Connect the appropriate power
plug and the 26-pin ribbon cable. Power
on. The LED on the board should light.
The typical schematic of the board has
been broken down into sections to make
troubleshooting easier. Some parts common to different sections are duplicated in
the schematics. Turning on RESET should
turn off the board LED. The board has two
sources for a Reset signal. There is the
input coming from the switch through the
ribbon cable and a “+13 V Failure” circuit.
On some boards, a jumper is required to
provide this +13 V power to this circuit.
Consult the schematic for the specific
board you are working on. The circuit
shown is only an example and may not
apply to your specific board.
Channel 1 Testing
Enabling the DIR input enables both RS485 interface chips and the RxDa LED
ina McBride, Nolan Brave
Rosita Medicine Crow and
July 2014
Slot Tech Magazine
Page 17
should follow the TxDa
switch. The DCD LED
should follow the DTR
switch. Disabling DIR
should kill both LEDs. This
RS485 port is designed to
drive a long distance but
may only go to a cable in
your SAS system. Whatever
is connected to channel 1
in your casino goes here.
This is set up in configuring
your comm channel SAS
menu. This is usually primary SAS but doesn’t always have to be.
Channel 3 Testing
Channel 3 should be defeated by reset. The RS232
interface generates its own
+V and –V for the RS232
line. RxDc should follow
the TxDc switch. The CTS
LED should follow the RTS
switch. The +V and –V the
interface chip generates
can vary from six Volts to
Page 18
nine Volts. This is only
intended to drive a short
distance. This is often Secondary SAS if you use it.
Channel 6 Testing
should follow the TxDf
Channel 7 Testing
This is the old style progressive sign output. Most
modern systems use a
serial port for the progressive and you may not even
use this port. Being a current loop design, voltage
readings can be misleading.
It is current flow that
counts more than voltage
level. The chip used is
popularly an ILD2, dual
opto-isolator. On the transmit side, the cathode of the
LED should be about +5 or
+13 (which ever is used on
Slot Tech Magazine
the anode, it varies with
board design) when off and
drop about 1.2 volts from
that when on. With the
loopback connected, the
output of the opto-isolator,
pin 6 should go to about
0.6 volts when on (limited
by Emitter-Base junction of
the transistor) and about
1.5 V when off. When off,
the output tries to go high.
How high is limited by the
LED on the receive side, so
we will not see a +13 V at
the output unless the Prog
Tx line is open.
If functioning properly, the
P Rx LED should follow the
P Tx switch.
Channel 8 Testing
Remove the jumper in the
fiber optic circuit (usually
E1) for loopback testing, if
you use it. Reset should
defeat Channel 8 operation,
otherwise the RxDh LED
August 2014
dge and skills refor the vast majority
ommon repairs we
the casino industry.
ing with a “no-math”
should follow the TxDh
switch. If no fiber optic
jacks are used, the LED
should still follow the TxDh
switch but the output goes
nowhere and there is no
input for the RxDh LED.
- Herschel Peeler
[email protected]
To advertise in Slot Tech Magazine,
contact Randy Fromm at 619.838.7111
or email [email protected]
ina McBride, Nolan Brave
Rosita Medicine Crow and
July 2014
Slot Tech Magazine
Page 19
Page 20
Slot Tech Magazine
August 2014
The new HAKKO FX-100 Soldering
Station brings induction heating
soldering technology to an even
higher performance level. It is a
dge and skills
compact, and very simple to
soldering station that uses an
for the vastuse
ommon repairs
wesystem design to optimize
the output power to the soldering iron
the casino industry.
tip to there is no loss of power in the
ing with a “no-math”
form of heat within the soldering
station. The new T31 Series soldering
iron tips use a highly precise
manufacturing and process control
method that allows for a more
repeatable tip temperature between
not only the same tip shape but even
between tips of different shapes
within the same series.
The HAKKO FX-100 Soldering Station
includes an Auto Power Assist feature
allowing it to recover faster and have
a higher throughput than other
soldering stations, and the BOOST
recovery mode allows for a bit more
power when needed when working on
solder joints attached to ground.
The T31 Series tips are constructed
with iron plating similar to that of the
HAKKO T15 Series tips, allowing FX100 users to experience HAKKO’s
renowned tip life for themselves but
make use of new induction heaters
that are precisely tuned and highly
with excellent power
ina McBride, Nolan
Rosita Medicine
Crow and
Attention Slot Manager!
Four-Day Classes With Randy Fromm
-Power Supply Repair
-LCD Monitor Repair
No previous electronics knowledge required. It’s easy and
fun to fix casino electronics down to the component level.
Call Randy at 619.838.7111 to discuss your needs.
The HAKKO FX-100 Soldering Station
also has the lowest EMI levels of all
induction heating soldering stations
and meets all applicable standards,
especially for those working on
extremely sensitive medical and
aerospace applications. Also included
are – Auto Sleep and Auto Power Off
features, Process indicator recorders
for tip heater loads and tip running
time, user programmable profiles to
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a Tip Change alarm. For more
information please visit us at
American Hakko Products, Inc.
28920 Avenue Williams.
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Tel: (661) 294-0090
Fax: (661) 294-0096
July 2014
Slot Tech Magazine
Page 21
Subscriptions & Back Issues
Why back issues of Slot Tech Magazine are
important to own . . .
lot Tech Magazine is strictly technical. As such, the magazine's contents are not time
critical. The repair information and technical data contained in past issues is just as valid
today as it was the day it was published.
Additionally, current and future articles more-or-less assume that readers are already familiar
with what has been covered in past issues. This editorial policy assures that Slot Tech
Magazine's contributing writers are not limited to "writing down" to the level of a novice
technician but are free to continue to produce the most comprehensive technical articles in
the gaming industry.
Randy Fromm's
Slot Tech Magazine is
published monthly by:
Slot Tech Magazine
401 W. Lexington #777
El Cajon, CA 92022
e-mail [email protected]
Back Issues
Printed back issues are available for onlysix months
from the date of publication. All single issues of Slot
Tech Magazine are $10.00/ea.
For further details on the contents of each issue,
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“I can help you bring down the
cost of casino electronics repairs”
Randy Fromm
“OK. You asked and I listened. My new tech class eliminates obsolete CRT
monitor repair and the associated monitor repair lab. In just four or five days,
your slot techs can learn to repair Power Supplies, LCD Monitors, Ticket
Printers, Bill Validators and more. It’s easy and it’s fun.“- Randy Fromm