Sylvania LC320SS9 Flashing Green LED

[heavymachines]

Re: Sylvania LC320SS9 Flashing Green LED

Do all the transformers read 5.3 Mohm with your meter set to 20M?

yep they do...

[heavymachines]

Re: Sylvania LC320SS9 Flashing Green LED

Do all the transformers read 5.3 Mohm with your meter set to 20M?

yep they do but it starts off at 12. something and stops at 7.6 m ohm soo? not 5.3 sorry

[heavymachines]

Re: Sylvania LC320SS9 Flashing Green LED

any ideas anybody? anybody had success fixing this poorly designed p.o.s?

[Mr Bill]

Re: Sylvania LC320SS9 Flashing Green LED

yep they do but it starts off at 12. something and stops at 7.6 m ohm soo? not 5.3 sorry

If all 4 are reading roughly the same then they are probably good. Check the board and see if there are any cracked solder joints.

[Jerry7591]

Re: Sylvania LC320SS9 Flashing Green LED

Hi guys! same problem with mine here. I'll keep checking things till I figure it out and re-post.

[heavymachines]

Re: Sylvania LC320SS9 Flashing Green LED

Hi guys! same problem with mine here. I'll keep checking things till I figure it out and re-post.

That would be great!!! will be very grateful, Having a heck to a time with it i will keep tinkering as well. Please do let me know what you find thanks...

[heavymachines]

Re: Sylvania LC320SS9 Flashing Green LED

Hi guys! same problem with mine here. I'll keep checking things till I figure it out and re-post.

any progress? thanks

[Jerry7591]

Re: Sylvania LC320SS9 Flashing Green LED

Nada Buddie. Still burning on it. Hope you got that Sharp going. My diodes are good on psu board. Thanks!

[heavymachines]

Re: Sylvania LC320SS9 Flashing Green LED

Nada Buddie. Still burning on it. Hope you got that Sharp going. My diodes are good on psu board. Thanks!

That's all right, the diodes are good on this one far as i can tell at this point, funny how all three tv's i am working on are putting up a fight about being repaired the sharp might be the easiest of the bunch. seiki second, but this beast has everyone miffed LOL.....including myself. I will try to keep working on it, here n there but first other 2 tv's Thanks alot fer the update.

[budm]

Re: Sylvania LC320SS9 Flashing Green LED

OK
1) the transformer resistance reading, it will show real high resistance because you are reading the lamp terminals not at the transformer terminals, the blue ballast caps are connected between the transformer output winding and the lamp, the cap is an open circuit device, you need to read at the transformer's terminals.
2) Do get DC reading on the Cathode side of the three Diode you replace? Black probe on the chassis, red probe on the Banded (Cathode) side of the Diode.
3) You need to check the sub-power supply on the main board also, you can see a bunch of black body diodes by the switching transformer.

[heavymachines]

Re: Sylvania LC320SS9 Flashing Green LED

the three diodes are fine in this set unsoldered and tested and shows readings one way and not the other all three of them...at the ccfl connectors, only way i can get a reading is set my dmm to 20m ohms and readings are starting from top transformer 1 to 5 5 being bottom

1. 9.0
2. 7.89
3. 6.5
4. 8.9
5. 5.65
thing is it never stays put it has fluctuations from 15.0 to 5.6 all over on pretty much all 5... its weird....but that's pretty low resistance anyhow.

[heavymachines]

Re: Sylvania LC320SS9 Flashing Green LED

i only have 4 diodes that read both ways on who knows what board you call it not the inverter circuit but the power board i would imagine.

[heavymachines]

Re: Sylvania LC320SS9 Flashing Green LED

budm ?

[Mr Bill]

Re: Sylvania LC320SS9 Flashing Green LED

What are the locations on the board? I have the power/inverter board in my basement and i can see if i get the same results. Was this in circuit or removed?

[budm]

Re: Sylvania LC320SS9 Flashing Green LED

The big board to the right of the inverter board as shown in Bill post 1, it has Tuner and input jacks on that board, as you can see, it is sub- power supply/Main board. You can see a yellow transformer and a bunch of Diodes, If any one of them read both ways, then you should lift one leg off the board and take reading again, common Diode failure on this board also, beside the bad inverter/power board.
Unless your TV is not the same as shown by Bill.

[heavymachines]

Re: Sylvania LC320SS9 Flashing Green LED

The big board to the right of the inverter board as shown in Bill post 1, it has Tuner and input jacks on that board, as you can see, it is sub- power supply/Main board. You can see a yellow transformer and a bunch of Diodes, If any one of them read both ways, then you should lift one leg off the board and take reading again, common Diode failure on this board also, beside the bad inverter/power board.
Unless your TV is not the same as shown by Bill.

its exactly same tv as bill same goofy design i will lift legs and retest em, but the difference in the symptom is only that mine will show digital tv logo briefly before it turns off and flashes the green led, i think it may be bad ccfl, i tried to simulate bulbs with a resistor to see if it would stay on longer and it did kinda, still not sure.... but thanks for your help and patience...

[Jerry7591]

Re: Sylvania LC320SS9 Flashing Green LED

heavy,bill,bud> Still making no headway with this poor design. Following you guys for direction. I get a couple green blinks and can hear H.V shut down on secondary power board at transformer. This one is driving me nuts. It's got to be something simple. This T.V looks like it's new inside. We'll get her. Thanks guys for all info,and posts

[heavymachines]

Re: Sylvania LC320SS9 Flashing Green LED

okay update tested all diodes on inverter board and all tested good, checked the bulbs are ok they light up, does have signs of age but still good and its the u type... now checking power/tuner board will report back....

[heavymachines]

Re: Sylvania LC320SS9 Flashing Green LED

okay update tested all diodes on inverter board and all tested good, checked the bulbs are ok they light up, does have signs of age but still good and its the u type... now checking power/tuner board will report back....

okay another update tested all diodes on all boards and the ones that read both ways i desoldered and retested and it tested fine when leg lifted. however one tested short and lifted leg and it tested fine so i will keep that one in mind and even thou when the bulbs lit up for two seconds were nice and bright and not dead like it was in the sharp tv that we fixed, thou there are beginnings of black rings where the connector is but i doubt thats the problem...so there is something else wrong with this set any ideas where to check next?


also it took me good portion of the day to test these crazy amounts of diodes on this set. and all solder joints are good.....

[budm]

Re: Sylvania LC320SS9 Flashing Green LED

Can I get good pictures of both sides of the inverter board, the whole board both sides, then 1/4 shot of board (both sides) so I can see the traces to figure out how it works.