Bally Electro Mechanical Slot Machine Part 1 of 3
Repair Tips for Reel Readers How to test and what to look for when doing your own repairs When one of these goes bad you may see an error that would be 4x or 7x where x indicates the reel position, i.
What is described below is for testing the reel reader card using this home built tester.
The tester provides both a 50 volt source or a 5 volt source switch selectable.
After describing this procedure I will tell you how to test the cards with out having to have a 50 volt source.
I designed and built a tester to make troubleshooting easier.
I test the card and all of the photo-transistors first, then I split the two halves of the card, one for cleaning but also so that I can use a dental tool, poking it into the tiny opening to push the photo-transistor or IR Emitter back up and out of the small square opening.
Once the bad components are pushed out of the way, I use my soldering iron to melt the solder on both leads at the same time while grasping the upper portion of the optic.
It comes off very easily.
Once removed use slot machine con bonus di benvenuto wick to remove the excess solder.
You want to do this so that when you put in the new device the leads will be nearly flat on the PC board.
Replace the defective components and quickly tack one side, allow the solder to cool and then solder the other side.
Once the other side has cooled you can go back and firmly solder the lead that was previously tacked.
Reassemble and then retest to make sure that the optics are working properly.
Tapping the top of the card lightly with the handle of a screw driver will show any intermittent connections.
The one question that may come up is what constitutes a bad device.
Since the reader cards supply signals to TTL logic devices https://jakeenglish.info/bally-slot/play-bally-slot-machines-free.html we can use standard logic levels of 2.
When measuring the output of the bally slot machine manuals transistor, if the voltage is less than slot machine con bonus di benvenuto />In the cards that I have repaired I typically see voltages of greater than 4 volts unblocked and.
Test all of the emitters and photo-transistors first, the replace all defective ones.
I make it a habit to clean the bulbs bally slot machine manuals alcohol on the 50 volt cards so that as much light as possible gets to the photo-transistor.
Testing reel readers without having a 50 volt source.
The 50 volt supply is only used to power the incandescent bulbs.
They are in series along with the 470 ohm resistor.
Each bulb requires 5 volts to operate properly.
If not in this range then you will have to remove the tape covering the backs of the slot machine con bonus di benvenuto and then measure resistance across each bulb individually.
Remember the bulbs are wired in series like the old Christmas tree light strings.
Assuming that the bulbs and resistor are OK.
Connect the other end of the resistor and the positive lead of the volt meter to pin 11.
Now using the 5 volt supply, apply 5 volts to pin 1 of the card and read the voltage, shine the light into the small tiny hole that is for Q1, voltage should be some where around 4.
Just keep in mind that ambient light might cause the light off reading to be higher.
You may find that if you have these readings, a Q-tip dipped into alcohol can be used to clean the top of the photo-transistor by pushing the Q-tip into the hole and then twisting the Q-tip.
I routinely clean these as well as to clean the bulbs.
The 5 volt card testing process is not much different other than it is not necessary to split the cards and you need a 3K resistor instead of a 47K resistor.
Apply the 5 volts across pins 16 and 14 and then measure the voltage on the associated pin pairs.
Remember to block the light for each IR emitter go here see the slot machine con bonus di benvenuto transition to a low state.
Testing results for the 5 volt cards readers you will not read anywhere near 4.
However with no current we would expect to find the voltages higher, what matters is the voltage under load conditions.
For testing I use a couple of 5Ω 5W resistorsactually, I use 20 Watt resistors to keep from burning my fingers.
Anything smaller than 5W will burn and smoke is bad.
The load resistors are placed across pins 13 and 20 of the J1 connector To test the power supply drawing.
With a 10 Ω load, drawing.
I also recommend that when repairing these power supplies to remove the heat sinks from the bridge rectifier BR1 and the 5 volt regulator Q1.
Clean off the old thermal heat sink compound and add new compound so that the heat transfer is more even.
This will allow for maximum cooling.
The minimum voltage to expect from the LM340-T5 is 4.
Sometimes you will find that you have no voltage.
In this case you want to check the 4 diodes and if the voltage seems to be half of what you expect then check the solder connections on the bottom side of the diodes.
These will become bad because of heat.
Other causes of no voltage is an open diode in the Bridge Rectifier BR1.
I would recommend to anyone doing any type of repair work to invest in an ESR Meter.
ESR means Equivalent Series Resistance slot machine con bonus di benvenuto a high ESR can have adverse actions to your circuit.
I have had several of these power supplies where despite changing the diodes, bridge rectifier and voltage regulator the output voltage was still below the regulators specified voltage of 4.
These problems were resolved using my ESR meter and the discovery of the large 11,000 ufd capacitor having a high ESR value.
If you have a light tower the WHITE light should be illuminated before the tests or resets can be done.
This does not mean that a burnt out bulb will prevent this but only serves as a quick indication that you should be able to run tests or clear error codes.
If you find that you are unable to run the tests or reset the machine, check the cherry switch behind the door hinges.
If this switch goes bad it will signal the MPU board that the door is closed.
Many owners of these E machines will bypass the door switch however the cherry switch must be operational RAM Tester Since many of the problems with the E Series slot machine are related to RAM failures I thought it would be a good idea to have one hanging around in my shop.
I searched the web and located a guy that had developed a tester for testing the 6264 RAM chips.
I sent him an email asking if this might be all? bally in the money slot machine join converted to test the 5101 RAM chip used in the Bally E Series slot machines and a large number of Bally Pinball machines.
My tester only tests the 5101 RAM chips, but NeoLoch Sales has since altered the design so that it will now test 5101, 6116, 21C14 and 9114 RAM Chips.
It also will run on a 5, 12 volt power supplies or from a 9 volt battery.
For further information please visit his website the page will open in a new window.
This tester is now obsolete and has been replaced by a newer more versatile version If you have some electronic design work that you need to get done contact David, he is easy to work with and offers reasonable prices.
Nomad Gaming continuously updates this page with IN STOCK Bally SLOT MACHINES. ANY Bally SLOT MACHINES ON THIS PAGE WILL BE physically located IN OUR WAREHOUSE. NOMAD GAMING DOES NOT BROKER GAMES. contact us for Bally SLot Machine inventory inquiries.
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