its a universal tdk inverter thats refusing to send the turn on external mosfet on .
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universal tdk inverter.what is the little white thing ?
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Re: universal tdk inverter.what is the little white thing ?
will post pic of the mainboard where the inverter plugs in and the inverter but plenty of pics and data sheet online for inverter . i can switch on the 12v by switching the fet on the mainboard on by making the gate low but inverter still not on . well no lights are coming on .i dont have x100 leads for my meter .
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Re: universal tdk inverter.what is the little white thing ?
inverter pdf .
https://www.alldatasheet.com/datashe...1212B-WJL.html
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Re: universal tdk inverter.what is the little white thing ?
Is the fuse good on the inverter? Do you have about 2v on pin 5 of the inverter to turn it on?
Check which pin Q1 base (R63) connects to on the inverter, If it connects to pin6, that is the protect line.Last edited by R_J; 04-12-2022, 12:32 PM.
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Re: universal tdk inverter.what is the little white thing ?
That looks like a fuse on the inverter marked 20 (2Amp), it should be connected to pin 1, The 2.5 volts needs to be on pin5, this is what turns on the inverter look at the datasheet, Pin5 Vmt 0~.4v=off, 2.5v~vin = on
The on/off signal should come from the main board.Last edited by R_J; 04-12-2022, 01:07 PM.
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Re: universal tdk inverter.what is the little white thing ?
You should be able to test it with a 12v bench supply (or even a 9v battery) then use a 1k resistor between pin5 and pin1 to turn it on.
What is that mess around C337 on the main board? does that line connect to pin 5 on the inverter?Last edited by R_J; 04-12-2022, 01:17 PM.
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Re: universal tdk inverter.what is the little white thing ?
I count 7 pins on the inverter and 5 pins on the main board. which pins on the inverter connect to which pins on the main board?
I doubt pin 5 of the inverter connects to R63, are you sure its not pin 6 on the inverter board?Last edited by R_J; 04-12-2022, 01:27 PM.
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Re: universal tdk inverter.what is the little white thing ?
Originally posted by petehall347 View Postpin 5 inverter goes to centre pin main board . which goes to r63
It makes more sense that pin 6 on the inverter connects to R63 and then the base of Q1, If the inverter has a problem, it will output 5v on pin6 turning on Q1 which will turn off the 12v to the inverter
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