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Pinball Rehab

pinball repair and restoration

Solid State Pinball Repair

 
36 results - showing 21 - 30 1 2 3 4
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Solenoid Stays Locked On
This guide will cover troubleshooting a solenoid that locks on when you turn on your game. If the game is not turned off immediately this problem can at best blow the solenoid fuse or at worst fry the coil or circuitry on the power supply board. For our example we'll use a Twilight Zone (WPC Fliptronics 2) where the right jet bumper locks on every time the game is turned on. Here's an excerpted version of the Operator's Manual and WPC Schematic Manual that we'll use during troubleshooting. While there are differences...
 
 
Advanced Desoldering Tutorial
This is part five of a five part series on soldering. This article is specifically oriented towards the advanced soldering techniques. It covers the techniques necessary to desolder circuit board components. The most important things to know about desoldering is that it is much harder than soldering and is where most of the circuit board damage occurs (lifted traces or pads, destroyed through-holes, etc.). The sad part is that all of this is avoidable if you respect the board and know what you're doing. Should I be Repairing Circuit Boards? ...
 
 
Basic Desoldering Tutorial
This is part two of a five part series on soldering. This article is specifically oriented towards beginners and playfield desoldering. It covers desoldering tools, supplies and the skills needed to replace a diode, switch, solenoid or broken wire. Advanced skills, better equipment and experience are needed before desoldering pinball circuit boards (see my rant on hobbyists hacking circuit boards). Desoldering Tools and Supplies The first thing you will need is either a desoldering pump (often called a solder sucker) or some solder wick or both (see Image 1). ...
 
 
Advanced Soldering Tutorial
This is part four of a five part series on soldering. This article is specifically oriented towards advanced soldering techniques. It covers the techniques necessary to solder circuit board components and builds upon topics covered in the Basic Soldering Tutorial. Required equipment is covered in Advanced Soldering Tools and Supplies. Should I be Repairing Circuit Boards? Only you can answer this question, but consider that board repair shops have reported the number of hacked (non-repairable) boards has increased dramatically since Clay put out his repair guides. Just as you wouldn't...
 
 
Advanced Soldering - Tools and Supplies
This is part three of a five part series on soldering. This article is specifically oriented towards the advanced soldering techniques. It covers the tools and supplies needed for soldering circuit board components. A lot of the frustration felt by those new to soldering is the result of cheap tools and/or supplies. Avoid Walmart, Home Depot or Lowe's (I'm also no longer much of a Radio Shack fan since they now sell a lot of inferior products). Find yourself a good local electronics store like Fry's or buy online at Fry's, MCM Electronics...
 
 
Basic Soldering Tutorial
This is part one of a five part series on soldering. This article is specifically oriented towards beginners and playfield soldering. It covers tools and supplies and the soldering skills needed to replace a diode, switch, solenoid or broken wire. Advanced skills, better equipment and experience are needed before soldering pinball circuit boards (see my rant on hobbyists hacking circuit boards). This tutorial is oriented towards getting you soldering quickly and properly. If you're interested in more advanced topics see Advanced Soldering - Tools and Supplies, which is part one in our...
 
 
Solenoids Fire at Power On or Game Searching for Balls
There are couple of different reasons why a pinball game will fire multiple solenoids when the machine is turned on, and/or a game is started. Depending on when and how the solenoids are firing will determine which steps you take next. The first scenario is when you turn on the game (this can often be intermittent) several solenoids all fire at once. This indicates a problem with the blanking circuit, which should prevent solenoids from firing until the CPU has completely booted up. If you are having this problem see XXX. The...
 
 
Cleaning Gold-Plated Contacts
Although it's fairly routine for the gold-plated contacts on your pinball game to require cleaning, there is probably no more contentious issue than how, and with what, they should be cleaned. You will find post after post that states categorically that you should never use contact cleaner on switches. That's just not true. Like any other repair, you need to select the right product (see Image 1) and use it properly. Plus contact cleaner will remove oxidation better than other methods. See Image 5 where I first cleaned the contacts with...
 
 
Lamp Matrix - Theory and Troubleshooting
Most solid state pinball's use a lamp matrix. The purpose of the lamp matrix is to reduce the number of driver circuits form 64 to 16 and reduce playfield wiring. Although the actual implementation may vary slightly, the theory and troubleshooting are the same. The lamp matrix works by turning on/off both the supply voltage, which is pulsed at a very fast rate, and the ground (which is also pulsed). Think of it as a light bulb with a switch on both sides; if only one switch is on nothing happens, but when...
 
 
Electronics Tutorial - Troubleshooting
This is part seven of a seven part series intended to provide a basic knowledge of electronics, test equipment, service manuals and troubleshooting in order to allow the reader to effectively repair pinball games. With that goal in mind I have simplified the explanations and purposely glossed over some details that add no value, and can easily confuse beginners. Good troubleshooting is both art and science and takes years to become proficient at. Even the best in the business really can't explain why one person is a great troubleshooter and another is not. So while...
 
 
 
36 results - showing 21 - 30 1 2 3 4