toshiba regza no picture

[tom66]

Re: toshiba regza no picture

Thx 4 the links..cant obtain them though client not logged in error..will keep trying..i was hoping them FL,s not fusable cos there is loads..ive nowt but time to check over this board cos no replacement ready available..so im gonna check all the FL,s & maybe order another crystal..thx

I'm not sure they are fusible links as you would only have a few of them on the board and only near PSU inputs and things like USB... ???

[selldoor]

Re: toshiba regza no picture

Do you mean cant download from ET or cant get them to run. If the former have you remembered to disable any adblockers.

[sienoki]

Re: toshiba regza no picture

"BTW those FL dsignations are Fusible links ,the board is covered with them"

That was actually what I was thinking they might be but was hoping they were
not. There are enough fuses: pico, glass ,ceramic, fusible resistors and the like
without having something else to check. I couldnt however find anywhere what the FL designation was - googled for over an hour. Do you know at what sort of
levels they pop.

Edit - Thanks for the Zeus link

Thx 4 the links..cant obtain them though client not logged in error..will keep trying..i was hoping them FL,s not fusable cos there is loads..ive nowt but time to check over this board cos no replacement ready available..so im gonna check all the FL,s & maybe order another crystal..thx

[selldoor]

Re: toshiba regza no picture

"BTW those FL dsignations are Fusible links ,the board is covered with them"

That was actually what I was thinking they might be but was hoping they were
not. There are enough fuses: pico, glass ,ceramic, fusible resistors and the like
without having something else to check. I couldnt however find anywhere what the FL designation was - googled for over an hour. Do you know at what sort of
levels they pop.

Edit - Thanks for the Zeus link

[S2udio]

Re: toshiba regza no picture

Hi guys my first belated post here !
Crt TV tech in my younger days .
Any thing electronic tech now !

I have one of these on the bench at the mo,but the 37AV555
Same boards etc
PSU board no SRV2169WW
Main AV board PE0630
Mine has a stuck in standby fault (due to the micro not sending a power TV
sig back to the PSU)AC det, 5V OK,Power on to PSU ok ,but the second TV on signal from the micro ...no go ?
With the PSU disconected it can be forced to fire up the 24v high current
rail ...so it appears its not the PSU,as all rails are present 5v-12v-18v-24v
Anyway not to hijack the thread , I have the schematics and the toshiba
Zeus app (to open the service manual )
Links
Service Manual (just AV board )The PSU and Inverter are 3rd party

http://elektrotanya.com/toshiba_32av.../download.html

And the zeus app for opening it,

http://elektrotanya.com/toshiba_zeus.../download.html

BTW those FL dsignations are Fusible links ,the board is covered with them

I would check all those for OC...Especially around the micro area.

Anyway ordered another AV board to continue my quest as i have spent hours with probes in hand and am convinced of a micro fault on mine,
We shall see,and will post back my findings.
Shall be watching this thread for any developments

Regards
Paul

[tom66]

Re: toshiba regza no picture

Question chaps In pic 4 post 13 bottom right corner there is a component FL981
wasted an hour this pm looking for the wiki list of component designations and when I found it FL isnt on. Any idea what it is?

It means filter or ferrite.

[selldoor]

Re: toshiba regza no picture

there is one at x1301 a metal box near the hdmi socket.

Question chaps In pic 4 post 13 bottom right corner there is a component FL981
wasted an hour this pm looking for the wiki list of component designations and when I found it FL isnt on. Any idea what it is?

[tom66]

Re: toshiba regza no picture

How many of them oscillators will be on this board?.. r they cheap & easy to replace..thx

Usually one oscillator per processor. One for audio, one for CPU, one for video, one for DVB... Yes cheap and easy to replace if not SMD (most aren't.)

[sienoki]

Re: toshiba regza no picture

One potential cause of this problem is a damaged crystal oscillator - unfortunately, you would need a scope to determine this.

How many of them oscillators will be on this board?.. r they cheap & easy to replace..thx

[tom66]

Re: toshiba regza no picture

One potential cause of this problem is a damaged crystal oscillator - unfortunately, you would need a scope to determine this.

[sienoki]

Re: toshiba regza no picture

Jamicon are "okay" caps. I wouldn't trust them on the output side of an SMPS, but they are okay for general purpose use as they are probably used in this case.

I will keep looking out for a replacement board..i will probably still be looking by the time tom comes to leeds unithx anyways guys

[tom66]

Re: toshiba regza no picture

Nowt else on board looking like those if there is they will be very small..thx
There is 1 jamicon 25v 1000uf on this board are they crap caps

Jamicon are "okay" caps. I wouldn't trust them on the output side of an SMPS, but they are okay for general purpose use as they are probably used in this case.

[sienoki]

Re: toshiba regza no picture

That is normal for an autoranging meter. Assuming those regulators contain "33" in their part #, they are fine.

Are there any other regulators? Like these:
http://www.ictradenet.com/models_pic...PAK,TO-252.jpg
http://upload.wikimedia.org/wikipedi...4/4f/D2PAK.JPG
http://www.national.com/images/pkg/mp04a.jpg
http://media.digikey.com/photos/Rohm...B1132T100R.JPG

Anything you see that looks like those could be a regulator, so note down the part # and test the pins.

Nowt else on board looking like those if there is they will be very small..thx
There is 1 jamicon 25v 1000uf on this board are they crap caps

[retiredcaps]

Re: toshiba regza no picture

What do you mean by OL, what range did you have meter on?

The Fluke 77, built before you were born, is only (by today's standard) 2.5 second display update speed and 3200 count multimeter. Modern Flukes are now 4 second display update speed and 6000 count.

Since both readings, 3.27 and 3.28, are beyond the Fluke 77's first range (likely 3.2V) this causes it to display 0L. The Fluke 77 then moves or autoranges to the next highest range (likely 32V) and finally displays 3.27.

Your BK 2709 is a 6600 count multimeter and would display the readings without the 0L.

edit: Too slow typing. You already knew the answer.

[tom66]

Re: toshiba regza no picture

Got fluke77 on VDC quick O.L on display then the reading..thx

That is normal for an autoranging meter. Assuming those regulators contain "33" in their part #, they are fine.

Are there any other regulators? Like these:
http://www.ictradenet.com/models_pic...PAK,TO-252.jpg
http://upload.wikimedia.org/wikipedi...4/4f/D2PAK.JPG
http://www.national.com/images/pkg/mp04a.jpg
http://media.digikey.com/photos/Rohm...B1132T100R.JPG

Anything you see that looks like those could be a regulator, so note down the part # and test the pins.

[sienoki]

Re: toshiba regza no picture

What do you mean by OL, what range did you have meter on?

Got fluke77 on VDC quick O.L on display then the reading..thx

[tom66]

Re: toshiba regza no picture

the tab pins readings..
IC951=from OL to 3.27vdc
IC950=same reading as IC951
IC602=from OL to 3.28vdc

What do you mean by OL, what range did you have meter on?

[sienoki]

Re: toshiba regza no picture

Ive taken 1/4 pics of both sides

the tab pins readings..
IC951=from OL to 3.27vdc
IC950=same reading as IC951
IC602=from OL to 3.28vdc

[tom66]

Re: toshiba regza no picture

The wire pin outs?

You've got 4 pins on the bottom plus a fat tab on the top. The fat tab is probably the LDO output voltage. It is also used to heatsink the regulator.

[sienoki]

Re: toshiba regza no picture

Can you check the tab pin?

The wire pin outs?