37bv700b flashing led

[Rickig]

Have the above mentioned set
When plugged in the blue light illuminates for 5 secs then begins to flash.
It's 17pw26-4 psu
17mb35 main
If you could point me in the right direction.... I know little about these vestel TVs.
Thanks

[ReeceyBurger123]

Re: 37bv700b flashing led

Does the power supply have any blown caps on it ?

[Rickig]

Re: 37bv700b flashing led

Does anyone have the firmware for this set?

[Rickig]

Re: 37bv700b flashing led

No blown caps. Looks good. I was wondering if it was firmware as it does it as soon as it comes on not when you try to take it out of standby.

[ReeceyBurger123]

Re: 37bv700b flashing led

Well best to check some voltages first as if a voltage isnt present the stby led will flash. Do you have a DMM ?

[budm]

Re: 37bv700b flashing led

Bad caps can look good and normal, Voltage testing will be the first step.
This is Toshiba TV made by VESTEL?

[Rickig]

Re: 37bv700b flashing led

Yes. Vestel.
Board doesn't have a legend for the pins.
Anyone have one? 17pw26-4

[budm]

Re: 37bv700b flashing led

Can we see the whole back side of the TV so we can see all the boards and how they are connected together?

[ReeceyBurger123]

Re: 37bv700b flashing led

Ok unplug the Mainboard from the psu, then plug the psu into the mains these power supplies will run with out the Mainboard connected. You should have the following:

Inverter connector:
24v Dc

Mainboard connector, probe the pins be careful when probing these not to short them out:
3.3v
5v stby
5v
9v (only some)
12v
24v

[budm]

Re: 37bv700b flashing led

http://www.scribd.com/doc/103810223/...PW26-tm#scribd

[Rickig]

Re: 37bv700b flashing led

With main board unplugged I have no voltages. With main in I have
1v on 6
7v on pin 4
3v on 12
2v on 14
2v on 15
0v on all others

[ReeceyBurger123]

Re: 37bv700b flashing led

That cant be right you will need 12v and 5v, retake your readings and make sure the probe makes contact with the pin on the connectors.

[budm]

Re: 37bv700b flashing led

If your measurement are at the correct pins and done correctly then the +5VSTBY is only putting out 2V, which then you will need to troubleshoot the Standby power supply section as shown in the diagram provided in post 10.

[Rickig]

Re: 37bv700b flashing led

Given that the tv goes into fault mode as so as its powered on and in standby.... Could the lack of voltages be the cause

[Rickig]

Re: 37bv700b flashing led

Using a different meter volts are as follows
8.6v on 4
2.8 on 6
1.6v on 12
5v on 14
3.3 on 16

1.6 on 11
3.3 on 15
.5v on 17
.5 on 19
.5 on 21

No other voltagea

[budm]

Re: 37bv700b flashing led

I wish you put the name of each pin next to your readings.

[Rickig]

Re: 37bv700b flashing led

I don't know the name of the pins. Sorry
Just going by that little pic u posted

[Rickig]

Re: 37bv700b flashing led

4 sw_switch
8 st_by
12 12v_1
14 5vstandby
16 3.3v standby

The odds I can't see well as half cut off

[Rickig]

Re: 37bv700b flashing led

Faulty psu... I just found another in my box of spares and its fired straight up.

[ReeceyBurger123]

Re: 37bv700b flashing led

Nice on, do you know how to check for S/C ?