How to troubleshoot the 7700: Test the Charging Stand
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The charging stand pins should stick out approx. 1/8″ from the bottom of the base of the plastic pocket they are in. Use a multi meter set for DC voltage and check the those pins. They should read around 1.6 to 1.8V. If they don’t read that then the base is bad. It could be the transformer or the wiring connections. The transformer can be checked with an ohm meter – if either set of shows an open circuit the transformer is bad.
There are only four connections to test in the base so it should be easy to tell what part of the charging stand is bad. Test the Iron. If the base is good, place the iron in the stand and press the red button. If the light does light up while in the stand we know the connections are good and the charge stand is providing power to everything. At this point it’s most likely the battery – though it could be an issue with the wiring to the tip. So, you can open it up and check that to confirm that it is the battery. If the light doesn’t come on then it could be the lamp, the button assembly, the wiring inside the iron, or the connection between the iron and the base. The lamp can be removed and tested with a ohm meter and should read a couple ohms. (You can also test it on a battery – 1.5V is enough. sometimes I use a 9v but only quickly as that’s too much for the light). We can replace the battery and test the wiring inside as needed.
Please note opening the unit is only for trained professionals and it does void the warranty.
If you open it up, a simple ohm meter walk through of all the connections tell that they are okay. If there are issues here with the internal wiring, we recommend returning the unit for repair here and we can ‘refurbish’ those parts. If the connections are all good and in working condition, the only thing left is to replace the battery.
Charger Main Failure Mode List:
- No Power to Base Transformer
- Bad Connection in Wiring to Charging Pins
- Not High Enough to Contact Iron
Cordless Solder Iron Main Failure Mode List:
- Fuse Wire Open
- Bad Connection in Wiring
- Dead Battery
- Dead Light
- Red Button Not Activating the “Switch”
- Bad Tip
Model #7700 Quick Charge Soldering Iron Kit features:
- Fully recharges in 3.5 to 4.0 hours
- Partially charged battery to full capacity in one to two hours
- Up to 125 soldering joints per charge during continuous use
- Withstands high-rate charging without damage
1. my iso-tip120 iron has no butane comming out when turn on.
2. if it is clogged how do I clean or clear out
3. if you have direction how to take apart can you email me them
Check the small brass orifice assembly and the nozzle assembly. Sometimes you’ll even see a paste like substance clogging one or both of those. At this point we recommend replacing those parts – though we are working on repair/cleaning options.
My Iso tip 7700 had no heat at all on the new tip I installed however the light was bright, I replaced the nicad cells and still the same ..I have the correct voltage at the charger..
What is the likelihood of my last new tip being faulty? How can I test this without another tip?
My iso-tip 7700 doesn’t heat up. I have done the USB conversion, as I am in Europe, and the 110 transformer doesn’t work. The voltage reaches 2.3 v in the iron, but when I press the button, the light briefly turns on, and dims rapidly. Without the tip inserted it lights up just fine. Is the problem the battery? At what voltage does the iron not work?