Posting this for two reasons one being this set marketed under several brands. It was given to me by a nice younger guy. Had standby light and at switch on red changed to blue and I saw a brief flash on screen. The set seemed to want to operate as it did not switch off until did so with remote. Took it apart and power and main mounted on inside of rear cover whereas inverter and tcon on chassis!!! Checked voltages and all as they should be so looked closely at all boards but no signs of any problem but did notice inverter board 10 connectors just a little dirty so gave them a clean and slid them in and out of connectors several times. Then put back together and set started normally got menus up did a factory reset and tuned channels in. Now running well. So the second reason to post is sometimes the simple solutions do work!!
Awa mhdv3720-03
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by x_orange90_xI just got this tv today and it appeared to have no backlight on. After taking off the rear cover and checking again in the dark I can see that MAYBE one quadrant is lit.. But still it's quite dim. I was going to check the LEDs with my tester, and I found LED 1 and LED 2 + pins on the wire from the inverter, but I couldn't identify a ground. Nonetheless I tried using a mounting screw on the inverter board and also the chassis as ground but regardless my tester reads 300 which is what it reads when there is no voltage draw.
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by GentianI have a tripp-lite aspint 3636vr inverter charger which blow some of mosfet transistors. I replaced them repaired also the driver circuit and tested but the mosfets burn again.
It work very well as inverter and also as charger if I let the rear switch in auto mode (inverter) and charger only(charging) but in auto when I connect the feed line 220V AC first time it pass ok to line and start charging the batteries but when I remove the feed line it pass to inverter mode and if I do it again the second time when passing from charging to inverter the Main transformer start making a...03-06-2023, 07:07 AM -
by valvashonFor some reason I'm just not going to let this 19" TV defeat me. I guess because I have a schematic to work from I feel like I'm oh so close.
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Channel: Troubleshooting & Designing Networks
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by eccerr0rIf I had a solar fed grid tie inverter (GTI), a modified sine wave inverter, and a power outage occurred, what would happen if you disconnected mains, backfed the modified sinewave inverter (MSI) into house power, and hooked up the GTI to the output of the MSI, would it work?
Next thing is trying to charge the batteries using solar power, but that's another issue ... - Loading...
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