Re: Toshiba 55ZV650U No power
The pins are on the top left, no BL-on
fatkid66
Total Noob
Last Activity: 11-23-2015, 05:51 PM
Joined: 09-03-2015
Location: Union County, NJ
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Re: Toshiba 55ZV650U No power
I dont see a pin for the backlitesLeave a comment:
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Re: Toshiba 55ZV650U No power
Ok, took a while, 3.28 volts dc at powtv before I even push the power button.
Pushing power button makes no change
If it is a matter of replacing boards, ill do it, just trying to narrow it down.Last edited by fatkid66; 10-24-2015, 11:14 AM.Leave a comment:
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Re: Toshiba 55ZV650U No power
I will check voltage at powtv when switch is pressed n get back to you.Leave a comment:
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Re: Toshiba 55ZV650U No power
Jumping 5vstby to powtv with 1K resistor with the main board dc'd only makes the relay SR80 change state. No leds, nothing else. The same thing happens when the main board is connected and set is plugged in.Last edited by fatkid66; 09-16-2015, 07:20 PM.Leave a comment:
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Re: Toshiba 55ZV650U No power
Noob question alert: can i use a 1/2 watt 1K resistor?Leave a comment:
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Re: Toshiba 55ZV650U No power
K thanx im trying to keep 5 balls in the air at once, its taking me time to get back to this...Leave a comment:
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Re: Toshiba 55ZV650U No power
Does the wattage of the resistor matter?Leave a comment:
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Re: Toshiba 55ZV650U No power
K, ill give that a try tomorrow, thanks.Leave a comment:
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Re: Toshiba 55ZV650U No power
That is my board exactly. Which pins do i need to jump out? I only have the 5vdc, no 12v, no 18vLast edited by fatkid66; 09-05-2015, 06:49 PM.Leave a comment:
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Re: Toshiba 55ZV650U No power
Noob question : the main board is the one with the vid/aud inputs right? Cleaned relay sr80, still same. With power on n all boards connected i still have no leds, only sr80 changing state. I will unplug the main board, how exactly do I force the psu on with the power button out of circuit.Last edited by fatkid66; 09-05-2015, 08:00 AM.Leave a comment:
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Re: Toshiba 55ZV650U No power
ok, long story, but I replaced the fused resistor R850, and have my 5v standby power. When I plug it in, relay SR80 changes state, but I get no leds on the tv. power button does nothing. After unplugging, relay SR80 again changes state after a short time delay. Power at bridge rectifier is 122vac and 166.8 vdc. None of the caps on the board are leaking or bulged, and there is little to no heat damage on the board. Any ideas?Leave a comment:
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Re: Toshiba 55ZV650U No power
Yes i understand that. I suppose you are referring to the entire board that the power cord attaches to. I will try to get some good pics of it tonite if possible, thanks for the assistance.Last edited by fatkid66; 09-03-2015, 12:54 PM.Leave a comment:
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Re: Toshiba 55ZV650U No power
I'm a bit of a noob to this, and as they say, a little knowledge can be dangerous! I am not sure where the psu is located, should it be obvious? Is it a board or a component? Also, is the main board the one the power cord directly attaches to or is it the one with all the vid/aud inputs?Last edited by fatkid66; 09-03-2015, 10:33 AM.Leave a comment:
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Toshiba 55ZV650U No power
I went to turn it on one day and nothing. I opened it up, and using advice from tampatec found no standby power at all, which explains no leds lit or anything on the tv. Standby should be 5 vdc, fluke reads 0. The 120vac is there on the board, and the 2 replacable glass fuses are ok, there are 3 fusable resistors on the board, one of which was bad. I have replaced that, but still no standby power, also the voltages on the bridge rectifier are not right either. If this is a power board problem, I would be fine in replacing the whole thing. Any advice? -
Re: New Members - please post your introductions here
Hi, I'm a new guy here. I am a construction/maintenance Electrician at a chem plant in Dirty Jerzy. I have had some success in minor TV repair as a hobby, but haven't been tinkering in a while, that is until my 55" TV DFO'd on me (DFO=ems term-done fell out). I hope to be able to get help with the repair and I will post in the appropriate forum when I'm able. I'm also a volunteer Firefighter/EMT, I play roller hockey, and coach my 2 daughters' U18 soccer team. Thanks for being here to help me out!!Leave a comment:
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