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thanks again for the info, when i get my replacement boards in i'll start fresh and see what happens and the can figure out which boards are bad. so i think i'll order a new lcd screen. wait i have a 6000w inverter is that the same lcd display ? again thanks BigBOB
wait i have a 6000w inverter is that the same lcd display ?
Yup. Same LCD for every PJ LF inverter...
no it doesn't have a display board rrrrrrrrgh. where can i buy a display for a pj inverter ? genetry ?
do i really need the display or will it run without it, i will use it in one place one load and leave it
It will run without the display, no issues--it has absolutely no connection to the control circuitry. Newer PJs don't even have the display.
Sean should have replacement PJ LCD boards.
Update, I found a resistor burned up. It is R228 on the bottom of the I/C board two components away from the ic. Don't know what that ic is . I think it's a ST 324 op-amp ic but not sure. I have received my upgrade board from powerjack. So i will upgrade the 8k unit. Any Ideas, the unit is a 24v unit an i have received a 24v board with the display and board with the switches on it. Any help will be appreciated. Thanks again BigBob
Update, I found a resistor burned up. It is R228 on the bottom of the I/C board two components away from the ic. Don't know what that ic is . I think it's a ST 324 op-amp ic but not sure. I have received my upgrade board from powerjack. So i will upgrade the 8k unit. Any Ideas, the unit is a 24v unit an i have received a 24v board with the display and board with the switches on it. Any help will be appreciated. Thanks again BigBob
That would be an LM324...and R228 being burned up kinda indicates that something SERIOUSLY went wrong. It's part of the AC INPUT voltage divider...the part AFTER the 8 megohm "isolation" bed of resistors from the AC line (per side...16 megohms total). I don't know how you could possibly get enough power to blow a 1/8w SMT resistor through 8 megs...
What gets me is the lm324 seems to be ok, I question what happened ? Lightning maybe that to me is the only thing that i can see what could cause it. I'll check the 8 megohm isolation bed of resistors.
That kind of fault points further to significant damage in the low voltage side of the board (perhaps not visible)--which is kinda indicated by all 3 LEDs being on simultaneously, with no beeper or any other indication of fault. There is no possible way for that resistor to get blown out by any sort of normal operation--or abnormal operation, for that matter.
Honestly, I'm not sure that this inverter is worth repairing.
It looks like something flashed metal around the resistor. I get 138k in one direction on r228 and 270k the otherway ???
I am changing everything in the unit to be sure. I will check the transformer to see if it is ok. should be because the fets are good
should be because the fets are good
First time those words have been put next to "bad Power Jack inverter" in the history of Planet Earth 😉.
That makes it even more confusing, particularly because any AC input fault would arc across the relay and blow the whole inverter to pieces.
R228 measures ~10K on a PJ board I have, corresponding to the code marked on top (reading 01C).
ok thanks 10k
what smd size is r228 ?
Most of the small resistors are 0603 SMT size.