Baird x32dtv

[tom66]

Re: Baird x32dtv

Bad... a MOSFET should show no shorts between pins, and only a diode drop between two pins.

[vinceroger69]

Re: Baird x32dtv

cool thanks tom so so far i need 1 fuse 1 primary cap 1 mosfet and the one ic have to price it all up i have also found the 7503 resistors are 750k each and they both test ok. i also have 1 small part labeled j9 i presume this is just a link? it is open ct leads up to the 8 legged ic thats blown i will upload a pic shortly waiting for good light so you can see the offending area.

[vinceroger69]

Re: Baird x32dtv

a small update managed to borrow mates esr meter tested all 19 caps on psu at least nine need changing plus the primary cap also whilst board i was testing the surface mount components on the board and have found r143 r141 j7 all open circuit so imo this board maybe beyond economical repair so i have made a offer on a megmeet mlt668 as in the link i have posted i have won the bid for £10.00 posted for it and it does have free return if faulty so thats good so i may need some help with the pin outs etc. a question as the old board uses the 16.5 voltage the megmeet does not have that can i drop one pf the spare megmeet 24 volts down to 16.5 volts easily? cheers guys

[tom66]

Re: Baird x32dtv

You can't drop the 24V to 16.5V easily, you'll have to use 12V and live with poorer sound quality.

[vinceroger69]

Re: Baird x32dtv

will give it a shot thanks tom on these boards mlt 668 have two sockets that i can connect the 24 volt to inverter plugs connector 3 or 5 i have added the scheme.

[vinceroger69]

Re: Baird x32dtv

the mlt 668 has just turned up i am just stuck on one wire as in where to put it the old psu has a pin marked ps-on with no voltage indicator the new psu does not have ps-on but it has 5v stb 5vstb 5v as i am only stuck on which wire to connect the ps-on wire to can you help?

[tom66]

Re: Baird x32dtv

Is there a pin marked STBY or REMOTE? A listing of all pins you are trying to translate would help.

[vinceroger69]

Re: Baird x32dtv

in the pdf post 25 on con 4 i think it maybe number 5 i need to connect it to on the old psu its only marked as ps-on cheers tom

[vinceroger69]

Re: Baird x32dtv

two pictures tom to go with the pdf left pic new psu right pic old psu.

[tom66]

Re: Baird x32dtv

The PSON pin = STB pin.

[vinceroger69]

Re: Baird x32dtv

just added new pic cheers tom appreciated will recap the new psu if it works out.

[vinceroger69]

Re: Baird x32dtv

tom thanks for you advice tv works great with the mlt668 even the psu all four screw mountings lined up no problems a question should this be freeview? does have dvb tuner board in but could it be analogue not digital as keeps saying no signal even with good aeriel in.

[tom66]

Re: Baird x32dtv

What does the DVB tuner board look like?
Done a complete reset & retune?

[vinceroger69]

Re: Baird x32dtv

says on it dvb-t the aeriel socket on main board connected by a lead to dvb-t board
looks like analouge http://en.wikipedia.org/wiki/DVB-T

[tom66]

Re: Baird x32dtv

DVB-T is digital freeview.
Does the set have a PCIMIA slot? For CI card?
Maybe you are on "analogue" mode and need to switch to digital... on some sets this is only possible with the remote control.

[vinceroger69]

Re: Baird x32dtv

no slots at all even that 40in lcd i am fixing has not.says on the screen dtv 5761 50hz then no signal.i have the remote will try again then.

[tom66]

Re: Baird x32dtv

It may not be compatible with current Freeview, there was a change a few years back which broke some older boxes/TVs (NTT switchover I believe.)

[vinceroger69]

Re: Baird x32dtv

i have the original remote control for the set which one key says dtv menu on it which does not work every other key on the remote does i have stripped the remote and cleaned it key does still not work i have cleaned a bit of trace on each side of the pad on the remote and linked with a bit of wire still does not make led on tv flash when i link any other pad it does flash and change channel etc i can get into dtv by the fav key ant then scroll through channels etc as in 103 itv2 etc still says no signal but may need re tuning as on my freeview box channel 38 is quest this set is bid tv on 38 so not sure. linking out the trace should of got me into the dtv menu but did not? maybe order another remote the analogue tuner searches ok just this issue with dtv.

[gazza544]

Re: Baird x32dtv

On the old board there was 2 vadj pins 12v and 2 grounds where did u attach this?

[vinceroger69]

Re: Baird x32dtv

do the vadj pins go to the audio on the main board was supposed to be 16.5 volts if i remember