Vizio E321VL dead blown fuse

[budm]

Re: Vizio E321VL dead blown fuse

Wrong post.

[budm]

Re: Vizio E321VL dead blown fuse

BTW, the repair kit in your link is for -1030, your board is -1300.
Pictures provided by shopjimmy.

[ivtec]

Re: Vizio E321VL dead blown fuse

BTW, the repair kit in your link is for -1030, your board is -1300.
Pictures provided by shopjimmy.

Thanks Budm;unfortunately shopjimmy. doesn't have this board and the repair kit in stock.

[budm]

Re: Vizio E321VL dead blown fuse

Yes I know that is why I indicated that the kit is not for your board.

[ivtec]

Re: Vizio E321VL dead blown fuse

Yes I know that is why I indicated that the kit is not for your board.

Hi Budm maby the KNON60 is KN8N60,what you think?


http://html.alldatasheet.com/html-pd...2/KF8N60P.html


https://www.utsource.net/search.aspx...=KF8N60&page=1


Also i checked here see link data sheets;the KF5250 cross-reference with EKF5250.


http://www.alldatasheet.com/view.jsp...F5250&sField=4

[ivtec]

Re: Vizio E321VL dead blown fuse

Thanks guys; i ended by ordering from shopjimmy the repair kit for my board PLHC-A942B 0500-0412-1300,and i'll post results,hope the Epprom is not bad.

https://www.shopjimmy.com/vizio-0500...repair-kit.htm

[budm]

Re: Vizio E321VL dead blown fuse

So I still do not know which fuse that blown, F601 (which is in the kit)??

[ivtec]

Re: Vizio E321VL dead blown fuse

So I still do not know which fuse that blown, F601 (which is in the kit)??

so far parts that i found bad F601 short, Q706,Q707 short, now i suspect Q602,IC150 are also bad.
when i replace the bad parts then i'll use a 100w250v bulb in place of the fuse to check if something-else is short before other parts blow.

[ivtec]

Re: Vizio E321VL dead blown fuse

So I still do not know which fuse that blown, F601 (which is in the kit)??

Description Quantity Board Location
Integrated Circuits 3 IC150, U401, 601
Diodes 6 D602, 606, 751, 753, 755, 757
Resistors 11 R183, 608, 618, 701, 704, 707, 711, 752, 756, 759, 762
Capacitors 2 C104, 175
Transistors 5 Q602, 706, 707, 708, 709
Fuses 1 F601

[budm]

Re: Vizio E321VL dead blown fuse

My question is, did the F601 that is blown on your board or the main AC fuse at the AC inlet that is blown?

[ivtec]

Re: Vizio E321VL dead blown fuse

My question is, did the F601 that is blown on your board or the main AC fuse at the AC inlet that is blown?

The AC main fuse is ok the fuse that blew up was the one on the pic link.

https://www.badcaps.net/forum/attach...1&d=1587353445

[budm]

Re: Vizio E321VL dead blown fuse

That means the shorts circuit is not in the PFC/primary power supply section, so I doubt that the MOSFET for the PFC is bad, and you already found two shorted MOSFETs in the Inverter section.

[ivtec]

Re: Vizio E321VL dead blown fuse

That means the shorts circuit is not in the PFC/primary power supply section, so I doubt that the MOSFET for the PFC is bad, and you already found two shorted MOSFETs in the Inverter section.

Thanks budm;i think the mosfet Q602 near the fuse that blown is ok!but when i get the repair kit i will check against the good mosfet,or just replace it, i think STR W60553 IC150 is bad,will see.
hope this repair kit has all the info about which is what!

[budm]

Re: Vizio E321VL dead blown fuse

BTW, I traced out the board, that F601 feeds the B+ to the Inverter AND the STR IC.

[ivtec]

Re: Vizio E321VL dead blown fuse

BTW, I traced out the board, that F601 feeds the B+ to the Inverter AND the STR IC.

Thanks budm; i checked that STR W6053N out of circuit and measurement results=


+Probe pin 1 - probe pins 3,4,5,6,7=OL


- probe pin1 + probe pin3=520ohms
- ^ ^ 1 + ^ ^ 4=2Mg
- ^ ^ 1 + ^ ^ 5=0.700Mg
- ^ ^ 1 + ^ ^ 6=1.5Mg
- ^ ^ 1 + ^ ^ 7=OL

Is this bad or good ? thanks

[budm]

Re: Vizio E321VL dead blown fuse

Thanks budm; i checked that STR W6053N out of circuit and measurement results=


+Probe pin 1 - probe pins 3,4,5,6,7=OL


- probe pin1 + probe pin3=520ohms
- ^ ^ 1 + ^ ^ 4=2Mg
- ^ ^ 1 + ^ ^ 5=0.700Mg
- ^ ^ 1 + ^ ^ 6=1.5Mg
- ^ ^ 1 + ^ ^ 7=OL

Is this bad or good ? thanks

Thanks dick_barton;appreciate your time;

with power supply board out of the tv

pins 1 and 3=10.6 ohms
Pins 1 and 5=10.2 ohms
Pins 3 and 5=0.6 ohms

So the earlier test you have reading of 10.6 Ohm, so what do you get when you measure the resistance between two pads on the board for pin 1 and pin 3, the two pads between pin 1 and pin 5?
I hope you are counting the pins correctly.

[ivtec]

Re: Vizio E321VL dead blown fuse

So the earlier test you have reading of 10.6 Ohm, so what do you get when you measure the resistance between two pads on the board for pin 1 and pin 3, the two pads between pin 1 and pin 5?
I hope you are counting the pins correctly.

Thanks budm; the above measurements were taken with diode function
and STR Chip out of the circuit.
now with Resistance function.

probe negative on pin 1 and positive on pin 3 =340k
Pins 1 and 5=0.700 M
Pins 3 and 5=0.600M


I'm measuring as per the pic attachment where 1, 3, 4 ,5, 6, 7 - pin 2 is broken.

[ivtec]

Re: Vizio E321VL dead blown fuse

Thanks budm; i checked that STR W6053N out of circuit and measurement results=


+Probe pin 1 - probe pins 3,4,5,6,7=OL


- probe pin1 + probe pin3=520ohms
- ^ ^ 1 + ^ ^ 4=2Mg
- ^ ^ 1 + ^ ^ 5=0.700Mg
- ^ ^ 1 + ^ ^ 6=1.5Mg
- ^ ^ 1 + ^ ^ 7=OL

Is this bad or good ? thanks

I took the example how to check the STR from this video,the only difference is his STR measures resistance on the pins with Positive probe on pin 1 ,probe negative pin 3,4,5,6,7 and reversing probes he has nothing,mine is the other way around i get OL if i put Positive Probe on pin 1 and negative probe 3,4,5,6,7. and if i put Negative probe on pin 1 and positive probe on 3,4,5,6,7 i get the results on my test above.


https://www.youtube.com/watch?v=nSiUcpqWTs8

[budm]

Re: Vizio E321VL dead blown fuse

Thanks budm; the above measurements were taken with diode function
and STR Chip out of the circuit.
now with Resistance function.

probe negative on pin 1 and positive on pin 3 =340k
Pins 1 and 5=0.700 M
Pins 3 and 5=0.600M


I'm measuring as per the pic attachment where 1, 3, 4 ,5, 6, 7 - pin 2 is broken.

That is not bad reading, now you need to test the resistance on the pads of the board where the IC pins used to be to see if it will show low resistance between pin 1 pad and pin 3 pad, pin 1 pad and pin 5 pad.

[budm]

Re: Vizio E321VL dead blown fuse

Thanks dick_barton;appreciate your time;

with power supply board out of the tv

pins 1 and 3=10.6 ohms
Pins 1 and 5=10.2 ohms
Pins 3 and 5=0.6 ohms

Sp per your poat 57, you indicated that those readings above were done in DIODE Mode, then the indicator on the meter should show the result in VOLT no OHM.
Look at your meter again and grab a good diode and test with meter setting in diode mode testing and show us what is showing on your meter screen.