Re: SHARP LC-80LE633U has open resistor r7133 on PSU
Hi, i think you're very lucky to get this tv for free if you will keep it for yourself, also because you don't seem to be much practical with theese, i have to spend thousand dollars to get a beast like this, and not with a basic fault like this! :-)
Any way..
1. The R7133 can't be 2,2ohm i guess, see it better, it is red red silver gold or red red silver silver.. (0,2 ohms)
2. There can be more damages tha what you expect, before R7133 you have to check the 2 big diodes and 2 big mosfets on heatsinks, then the white sense resistor R7217
3. The snubber diode D7112 is not a TVS and is clearly cooked watching its legs.
4. The IC is for sure cooked as the diode in parallel to the pins 4-GND makes you believe it's ok but if you desolder one leg of that diode besides the ic you will se an OL both ways in IC test.
5. The 4 SMD 1Mohm resistors may be bad, i think your meter must read them if them are good.
Hi, i think you're very lucky to get this tv for free if you will keep it for yourself, also because you don't seem to be much practical with theese, i have to spend thousand dollars to get a beast like this, and not with a basic fault like this! :-)
Any way..
1. The R7133 can't be 2,2ohm i guess, see it better, it is red red silver gold or red red silver silver.. (0,2 ohms)
2. There can be more damages tha what you expect, before R7133 you have to check the 2 big diodes and 2 big mosfets on heatsinks, then the white sense resistor R7217
3. The snubber diode D7112 is not a TVS and is clearly cooked watching its legs.
4. The IC is for sure cooked as the diode in parallel to the pins 4-GND makes you believe it's ok but if you desolder one leg of that diode besides the ic you will se an OL both ways in IC test.
5. The 4 SMD 1Mohm resistors may be bad, i think your meter must read them if them are good.
Comment