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Breathing life back into a pair of BD801's

278 Views 2 Replies 2 Participants Last post by  Javers
Hi Guys,


Need a little help with a pair of 801's I bought that had been stored in damp conditions, and I mean damp! The lenses actually had water sloshing around inside them :eek:


So after 3 months by the radiator I've started work. Stripped both machines completely, cleaned off all corrosion etc. Initally I had no working smps's (thanks to Curt for your offer of repairing them). But by re-soldering a few points, changing fuses etc I've got a power supply working and proceeded to power up unit #1. Talk about snap crackle and pop, first few minutes of operation were a little scary! But after about 30 mins things seem to settle, and unit #1 was working a treat. Was very chuffed with my first Barco repair at this stage :) We'll come back to unit #1 later.


Ok so next I move the working smps into unit #2 and try to fire up, unit comes on but no hv. On closer inspection I notice the hold down led is lit on the hvps. So I put the known good hvps from unit #1 into unit #2, led still remains lit. Can someone plz point me in right direction of what to swap / try next as I'm a newbie and a litttle hesitent around ht.


Now back to unit #1. Last night had a composite feed on port 1 and scaler (dvdo) on port 3. I switched from input 1 to 3 and no output :( switched back to input 1 and the output has gone black and white! Since then nothing high rez >31khz will display, not even internal # patterns and anything composite or svideo is b+w. OK so by swapping boards from unit #2 I discover the vertical def + sync board is at fault, unfortunatly only the b + g channels from the board from unit #2 work. Double :( :(. The red did flick on for a second or two so fingers crossed a bit of re-soldering will get that going. But what on earth did I do to the other board? Guess there isn't going to be an easy fix for that?


If anyone can help me out with my restoration project i'd be very greatful, oh btw forgot to mention they've got convergence on green so if I reach nirvana and get both working, stacking experiments will have to be done :)


Jon
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See my website for pix, the HV issue is a bad quadrupler or splitter.


THe lack of color is a bad quad decoder board, my site has pix of where those are as well.
Thanks for your help Curt, I've been swapping boards around today. Oddly enough, the lack of colour (and lack of high frequencies) both seem to be down to the vert def / sync board. So I've also tried swapped around the sub-board on it and found the fault to be somewhere on the main board. I'm slowly narrowing it down! Also noticed the D20 led lights when you switch to a high freq, so I presume its not finding sync at the high freq's. Damn I wish I knew more about electronics! :( If anyone can give me any more pointers I'd be very greatful.


Hopefully will also try swapping around quad and / or splitter this weekend.


Jon
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