See full version: How to Troubleshoot a Schumacher Battery Charger
Allow the charging to continue for up to 20 minutes if the charger makes clicking noises. The clicking can be the circuit breaker cycling and can indicate a defective battery, or a very discharged battery that isn't defective. If the clicking doesn't stops after about 20 minutes, the battery may well be bad and you should replace it. more
Try a different AC power outlet if the charger won't turn on when it's connected. You can try another appliance -- a worklight, for example -- and see if that works. If the worklight won't come on, the problem is with the wall outlet, not the Schumacher charger. If the lamp comes on, try the charger again and wiggle the connections. more
Schumacher has been producing automotive electrical products since 1946. It's an official supplier for the NASCAR auto racing brand and produces chargers, jump starters and inverters for NASCAR. Schumacher battery chargers are designed to work automatically, however issues can include the meter not working, noises and the charger not turning on. These kinds of problems can be rectified. here
Jiggle the clips and rock the clips backwards and forwards if there's no meter reading. The clips aren't making proper contact.
Shut off the charger and reverse the battery connections if the battery has been replaced and the clicking continues. The leads are on the wrong poles. more
Since 1947, Schumacher Electric Corporation has been leading change and driving performance to exceed its customers’ expectations. Engineered patent-pending technologies and award-winning marketing makes Schumacher the brand of choice. Schumacher’s legacy is its commitment to quality and exceptional customer service. Schumacher brings experience, innovation and excellence to the next generation of battery maintenance… the #1 name in battery chargers around the world. more
The Schumacher name is also synonymous with NHRA drag racing. Don Schumacher rocked the racing world with his driving abilities and in 2012 Don was inducted into the International Motorsports Hall of Fame. Now his son, Tony Schumacher, is rocking the driving world with his eight consecutive NHRA Top Fuel World Championships. Passion and commitment are the Schumacher way. more
If you battery may overheat, the charger will automatically switch it off in order to prevent damage. If the temperature seems normal, then unplug the charger and reverse the connections. here
Normally, the light on a Schumacher battery charger is either yellow or green. Yellow indicates charging and green indicates that the battery is full. here
If your Schumacher battery charger will not turn on while it is properly connected, you may need to replace you main power regulator board. Double check to make sure your connection is secure and that your battery is working properly before replacing a part.
Overheating is the number one problem that causes batteries to defect. Choose a sensible place to charge your battery when using a Schumacher battery charger. here
First, jiggle and rock you clips back and forth. This will ensure the problem is not with the connection. more
Well that about raps it up. This little One Amp charger has served me well over the years. As we've seen it is a pretty simple circuit to build. The use of modern general purpose components need to be considered when building a charger like this one. Good luck with your design. here
[ photos showing charge current DC, battery voltage DC, transformer voltage AC, high battery ] here
We'll be looking at this Woodward-Schumacher Electric Corp. One Amp battery charger to get some ideas about what it takes to make one. I did a Google search and found Woodward-Schumacher is still in business designing and selling battery chargers. That is remarkable.
Gregg Scholfield 7-21-2012
EDIT: Updated 1-26-2013 here
[ chart selenium rectifier voltage drop vs current ] more