Toshiba 42rv530u wont power on

[Heavyarms92]

Re: Toshiba 42rv530u wont power on

Post #106:
BTW: Post 106 did ask you to check of there is 160V or not, what other instruction do you need to check the +160V? What do you think the meter should be set to? Read the meter manual?

"Based on the instructions on post 106 I checked the fuse with the board unplugged. Because no instructions were given as to what setting to check it on I went with continuity = the arrow pointing to the right with the plus symbol. I also checked with my meter set to 20V = 0.0V 200V = 00.0. I should have included these #'s but that's why I stated what settings I was using. I realize now that I was on the wrong setting. I assumed that people with more experience than me would have seen such a simple error and corrected me. I was wrong and naive to assume anything that I have here." So it's our fault for not correcting you.[/QUOTE]

Yes, I have been reading it since you instructed me to on post #68 I have been trying to figure out who's instructions I am getting mixed up with who's.

These are my results, first one is plugged in, the second is after pressing the on button. All on 20VDC.

C821 black to F820 fuse red = meter at 20V = rises to 19V then drops to 0. Meter on 200V = rises to 23.5 V then drops to 0.

I did these too per nomoresonys instructions first is plugged in, second is after pressing on.

POW_DB = 0V, 0V
POWER_TV = 0V, 0V
POW_PRO = 1.7V then trickles down to 0V, 1.7V then trickles down to 0V.
POW_SIG = 0V, 0V
AC_DET = 0V, 0V
POW_LCD = 0V, 0V
12V_LCD = 0V, 0V
12V = 0V, 0V
5V1 = 1.13V then trickles down to 0V, 1.11Vhen trickles down to 0V
18V_AUDIO = 0V, 0V
24V = 0V, 0V

Everytime someone tells me to do something I put a lot of effort into following the instructions to the letter. I know how frustrating this is for me, and I am sure this is frustrating for you. I feel like I am so close this time though.

I've watched people test a bunch of components, and I have tested many myself also. I think I've straightened myself out finally, but I feel like an imbecile regardless. Please Lord let me get this right!

[R_J]

Re: Toshiba 42rv530u wont power on

Here are 2 points to measure with the tv pluged in. don't wory about the power button.
Put your meter to read AC volts, (NOT DC VOLTS) and on the 200 volt ac range.
Step1
Measure the ac voltage between JP001 (jumper wire) and F801 fuse. you should measure around 120 volts AC

Step2
measure the AC volts between JP011 (jumper wire) and GJ12 (jumper wire)
You should also measure 120 volts AC
IF you measure 120 volts in Step1 but NOT in step2
You know what is bad?

[Heavyarms92]

Re: Toshiba 42rv530u wont power on

Here are 2 points to measure with the tv pluged in. don't wory about the power button.
Put your meter to read AC volts, (NOT DC VOLTS) and on the 200 volt ac range.
Step1
Measure the ac voltage between JP001 (jumper wire) and F801 fuse. you should measure around 120 volts AC

Step2
measure the AC volts between JP011 (jumper wire) and GJ12 (jumper wire)
You should also measure 120 volts AC
IF you measure 120 volts in Step1 but NOT in step2
You know what is bad?

Is JP011 supposed to be JP001? In your picture it looks that way sorry if I am mistaken. JP001 to F801 = 121 V. JP001 to GJ12 = 20V.

Does that mean that there is something wrong at GJ12?

[R_J]

Re: Toshiba 42rv530u wont power on

I gave you a picture!!! the first place to measure is JP001 and the F801 fuse
NEXT measure between JP011 and GJ12
So you measure JP001 to F801 = 121 volts. That is GOOD
when you measure between JP001 OR JP011 (they are on the same line) and GJ12 you get 20v (way too low) and what is that square white thing near GJ12... could it be... R850???

In this picture I marked the path the AC takes from the cord to the bridge rectifier.
Note where R850 is in that path and note where the relay contacts are also.

[Heavyarms92]

Re: Toshiba 42rv530u wont power on

I gave you a picture!!! the first place to measure is JP001 and the F801 fuse
NEXT measure between JP011 and GJ12
So you measure JP001 to F801 = 121 volts. That is GOOD
when you measure between JP001 OR JP011 (they are on the same line) and GJ12 you get 20v (way too low) and what is that square white thing near GJ12... could it be... R850???


In this picture I marked the path the AC takes from the cord to the bridge rectifier.
Note where R850 is in that path and note where the relay contacts are also.

Yes the pictures are great! I see all of them. And yes, so bad R850? Replace?

[R_J]

Re: Toshiba 42rv530u wont power on

YES that is what I said back in post #33. which is 5 posts after you hijacked the thread. You need to replace the resistor AND the relay. If you do not replace the relay, the resistor will go open circuit again.

[Heavyarms92]

Re: Toshiba 42rv530u wont power on

YES that is what I said back in post #33. You need to replace the resistor AND the relay. If you do not replace the relay, the resistor will go open circuit again.

Ok, I will try to order them by googling the numbers on the fronts. So many people were commenting I got whisked away.

I was thinking this was the problem for a while now. I believe I even typed it in one of my posts. Which relay are you referring to? SR81? It has little tabs holding it in under the solder, what do I do for that?

[R_J]

Re: Toshiba 42rv530u wont power on

There are 4 connections to unsolder the SR81 relay. two for the contacts and two for the coil. There are no tabs holding it in, it is soldered in.
What are the numbers on the relay?
It should be a 12 volt relay, here are digikey pt# others have used.
SR81, 255-3350-ND Relay 12v 5amp
R850, TWW5J2R0E-ND 2ohm 5w resistor

The original resistor is 1.8Ω 5watt but is hard to find (unless ordered from ebay/China) so a 2Ω 5 watt is used which is perfectly fine.

[Heavyarms92]

Re: Toshiba 42rv530u wont power on

There are 4 connections to unsolder the SR81 relay. two for the contacts and two for the coil. There are no tabs holding it in, it is soldered in.
What are the numbers on the relay?
It should be a 12 volt relay, here are digikey pt# others have used.
SR81, 255-3350-ND Relay 12v 5amp
R850, TWW5J2R0E-ND 2ohm 5w resistor

The original resistor is 1.8Ω 5watt but is hard to find (unless ordered from ebay/China) so a 2Ω 5 watt is used which is perfectly fine.

How did I get led astray? This is what I was trying to do a week ago. Parts are ordered. Hopefully shipping will not take very long.

I will never be able to repay your patience and kindness. I am not worthy.

[nomoresonys]

Re: Toshiba 42rv530u wont power on

I wish I would have seen this sooner. With all the people commenting and having to spend time away from this I completely missed this. Ugh, this would have made everything so much easier. This answers pretty much all the questions I was trying to figure out on my own.

Ok, cool, I knew there was a communication error someplace.

[nomoresonys]

Re: Toshiba 42rv530u wont power on

I'm trying to understand why there's no voltage readings on the connector.

[Heavyarms92]

Re: Toshiba 42rv530u wont power on

I'm trying to understand why there's no voltage readings on the connector.

The coil relay or the resistor? The reading is 1 which indicates an open circuit on my multimeters apparently. On both components no matter what ohms setting I put my meters on.

I did not come across an indication for "Open" in the manuals that I found online, or the ones that I was so kindly supplied with.

I believe I made the blunder of not realising this sooner because in all the videos I was watching people were using "Fluke" brand multimeters or similar multimeters that use OL instead of just the #1 on the screen. I thought that the meter had to say "OL" specifically for the component to be open because I was so intent on following everyone's instructions to the letter.

I was sadly mistaken, this mistake has caused quite a bit of grief on all our parts. For that I am sorry. I have located a corner with a stool and a dunce cap for me to wear.

In the mean time, parts are on their way, and I eagerly await their installation.

Everyone's help is much appreciated.

[R_J]

Re: Toshiba 42rv530u wont power on

If nomoresonys means the connector going to the main board, its because the power supply is for all intents and purposes DEAD. the fact that the R850 (see pic. post #124) is open circuit. its the same as if the main fuse was open, or for that matter it was'nt even pluged in.

[nomoresonys]

Re: Toshiba 42rv530u wont power on

If nomoresonys means the connector going to the main board, its because the power supply is for all intents and purposes DEAD. the fact that the R850 (see pic. post #124) is open circuit. its the same as if the main fuse was open, or for that matter it was'nt even pluged in.

Ok, clears that up, thanks R J.

[Heavyarms92]

Re: Toshiba 42rv530u wont power on

If nomoresonys means the connector going to the main board, its because the power supply is for all intents and purposes DEAD. the fact that the R850 (see pic. post #124) is open circuit. its the same as if the main fuse was open, or for that matter it was'nt even pluged in.

I would like to take a moment to convey my gratitude towards you. The TV fired up no problems. Thank you so much for your patience, and kindness. I will wear the dunce cap a little longer, but after today I feel like Dusty Rhodes beating Ric Flair in a steel cage for the title!

I'm a little less green now, and I'm so glad that I stuck this out and saw it through. Apologies, hi fives, and salutations to all parties involved.

I learned way more than I thought I ever would, and can't thank everyone enough. 1=0L, I will never forget that! None of my success today would have been possible without your help R J! You are the best!

[nomoresonys]

Re: Toshiba 42rv530u wont power on

More of a thread resurrection, since the original issue was solved 2 years ago.

[Heavyarms92]

Re: Toshiba 42rv530u wont power on

More of a thread resurrection, since the original issue was solved 2 years ago.

Is that bad? Should I have not asked so many questions?

[R_J]

Re: Toshiba 42rv530u wont power on

Is that bad? Should I have not asked so many questions?

It would have been better had you started your own new thread, Nothing wrong with asking questions. good to here its working