Rca l37wd12 lcd tv

[gelatinous]

Re: Rca l37wd12 lcd tv

just bumping this back up. I haven't had a chance to trace the button line yet, I will hopefully be doing that tomorrow evening.

[gelatinous]

Re: Rca l37wd12 lcd tv

I hope to be ordering an ESR meter soon so that I can try and test some of the SMT caps on the mainboard.

budm, would I be able to pester you about a schematic for the scaler board if there is one?

[budm]

Re: Rca l37wd12 lcd tv

Let me look.

[gelatinous]

Re: Rca l37wd12 lcd tv

thanks for checking!

[gelatinous]

Re: Rca l37wd12 lcd tv

any luck budm?

I'm trying to source a main board in case I can't repair this, but they aren't very plentiful.

[budm]

Re: Rca l37wd12 lcd tv

Sorry, been real busy. the drawing is so big, I do not think I can take good pictures that is good enough to read, I will try to scan it into PDF using printer at work.

[gelatinous]

Re: Rca l37wd12 lcd tv

no worries budm,

I found a used main board on ebay that I have ordered. no rush for the schematic right now, though if the replacement doesn't work I may ask again.

Thanks for looking for me!

[gelatinous]

Re: Rca l37wd12 lcd tv

I got my replacement main board today, installed it and am now posting this from the working TV. I'm using it as a 37" computer monitor since I didn't bother replacing the analog tuner connection which has been snapped off.

All I wanted it for was to use as a computer monitor and that's what it's doing!

Total cost ~$80 CAD

[budm]

Re: Rca l37wd12 lcd tv

That is a good deal for $80, great work.

[cequil32]

Re: Rca l37wd12 lcd tv

I know that this is an old thread but I believe I am having trouble with my power supply on this model. I am getting the on and off signal because the 120 volts supplying the power supply comes on and off. However, I am not getting any outputs from the power supply. I have already replaced all the capacitors with FM Panasonic's but still no help. Any other suggestions on where the failure my be or a schematic of the power supply board itself.

Thanks!

[newtothis]

Re: Rca l37wd12 lcd tv

I know that this is an old thread but I believe I am having trouble with my power supply on this model. I am getting the on and off signal because the 120 volts supplying the power supply comes on and off. However, I am not getting any outputs from the power supply. I have already replaced all the capacitors with FM Panasonic's but still no help. Any other suggestions on where the failure my be or a schematic of the power supply board itself.

Thanks!

To save me jumping around can you take a pic of your boards... DMM at hand?

[cequil32]

Re: Rca l37wd12 lcd tv

I will try to post some pictures tonight...I at work right now and honestly I haven't looked at it for about a week so I will try to get it back out and do some investigating as well.

Based on the interconnect diagrams and what I understand on here...when I hit the power button it sends a signal to the scaler board and the scaler board goes to the 1W power board and turns a relay on that supplys the 120v to the SMPS which then supplys the 12v and 24v signals. Does this sound accurate?

[newtothis]

Re: Rca l37wd12 lcd tv

I will try to post some pictures tonight...I at work right now and honestly I haven't looked at it for about a week so I will try to get it back out and do some investigating as well.

Based on the interconnect diagrams and what I understand on here...when I hit the power button it sends a signal to the scaler board and the scaler board goes to the 1W power board and turns a relay on that supplys the 120v to the SMPS which then supplys the 12v and 24v signals. Does this sound accurate?

You have the idea

[cequil32]

Re: Rca l37wd12 lcd tv

Ok, here are some pictures...the capacitors that typically fail have been replaced, not a great solder job but didn't have much to work with since I bought this power supply on ebay and believe the previous owner attempted a repair. This power supply worked for awhile but now has quite working. As I stated before I can control the on/off signal providing the 120v to the power supply. On the output connector all I am seeing is 3.1v on Pin 1 of the 7 pin connector which I assume is a on/off signal as well. Any ideas?

[cequil32]

Re: Rca l37wd12 lcd tv

Well, me just being stupid, didn't check the fuse. The fuse was open, I replaced it but still no joy. I will take it back out and see if the fuse blew again. Anyone have a schematic of this power supply?

[newtothis]

Re: Rca l37wd12 lcd tv

ok can you give me clear shots of the connectors that you have tested.

Also you state the fuse was open... which fuse was this?

[selldoor]

Re: Rca l37wd12 lcd tv

What happened to your old power supply? do you still have it available for spares?

If this one worked for a while then stopped did you or previous owner use low esr caps
bought off a reputable dealer have you. I would try and clean up the soldering - may be the picture but some joints look cold and some could be bridged- magnifying glass job.

[light0070702]

Re: Rca l37wd12 lcd tv

i have an Rca l37wd12 lcd tv i got for a steal 26 bucks when plugged in the tv turns on but no picture or sound i have it apart so when i plug it in i hear the relay click on on the 1w board but nothing a few seconds later there is a read light on the back-light master inverter board that comes on then shuts off the stand by light turns green but after awhile will go back to red any help at all would be greatly appreciated i do appoligize about my bad spelling

[shyguy813]

Re: Rca l37wd12 lcd tv

I have a RCA L37wd12 I got for free. I replaced one cap on standby board and now it is working fine but I noticed it is missing the IR sensor board so I can't use a remote. Does anybody know what the part number is and where I can find one?

[mmartell]

Re: Rca l37wd12 lcd tv

Search the model number on Shopjimmy it may show up there if not you can ask them about it.