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tse
Joined: 03 May 2006
Posts: 1014
Location: Sweatbucket, Fl.
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| Posted: Mon Dec 05, 2011 12:40 am Post subject: |
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| dvh99 wrote: |
dragan, i wouldn`t use zeners, just get the diodes from the mouser link. |
I agree. The SBYV27 is a good choice for the added drive clamp diodes. If you have to use smb the following will work fine. In fact, just about any 1A 50V or more fast rectifier would do the job.
Scott
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draganm
Joined: 08 Mar 2006
Posts: 8990
Location: Colorado
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| Posted: Mon Dec 05, 2011 4:05 am Post subject: |
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| dvh99 wrote: | c4 and c5 are parallel to q3 so either one of them jumpered is fine i guess.
i jumpered the c furthest away from the heatsink (can`t recall if it was c4 or c5) q3 was just taken out. |
oops, you mean the line at the top is cut-off in the drawing. 
| dvh99 wrote: | nice ads by google btw, 3 nice girls from ukraine, anna tatyana and nataliya approx 22yrs of age weighing approx 54kg and approx length 162cm and quite stunning  .
am i gonna miss all those fantastic ads if i become a member  . |
Slightly Damaged people for sale, it's a great deal if you don't mind the Alcoholism and Herpe's.
Last edited by draganm on Mon Dec 05, 2011 4:49 am; edited 2 times in total
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draganm
Joined: 08 Mar 2006
Posts: 8990
Location: Colorado
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| Posted: Mon Dec 05, 2011 4:10 am Post subject: |
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| tse wrote: | | dvh99 wrote: |
dragan, i wouldn`t use zeners, just get the diodes from the mouser link. |
I agree. The SBYV27 is a good choice for the added drive clamp diodes. If you have to use smb the following will work fine. In fact, just about any 1A 50V or more fast rectifier would do the job.
Scott |
Fast rectifier yes, zener no, check . Thanks Scott, much appreciated.
I can order the parts tonight and get this new product on the market soon I hope for all those crazy 1080P72Hz guys out there. Have to send Dennis something nice too, maybe not a Ukrainian girl but..........
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dvh99
Joined: 25 Dec 2009
Posts: 2158
Location: nederland
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| Posted: Tue Dec 06, 2011 3:58 pm Post subject: |
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dragan, uc3709 chips are ordered.
if you order the clare parts we can compare these 2.
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draganm
Joined: 08 Mar 2006
Posts: 8990
Location: Colorado
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| Posted: Tue Dec 06, 2011 4:46 pm Post subject: |
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| dvh99 wrote: | dragan, uc3709 chips are ordered.
if you order the clare parts we can compare these 2. |
yes, I got the Clare ones, Should be here end of this week. I only have 2 working spare HDM's though, One is an 08P I'm afraid to gamble with and the other is an 07P Where Keystone and side pin don't work.
I need to repair the 07 if possible before putting expensive parts in it. I'll post tonight what parts I've replaced and hopefully I can get some idea's where to look next.
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Bodi79
Joined: 08 Oct 2011
Posts: 130
Location: Austria
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| Posted: Thu Dec 08, 2011 1:27 am Post subject: |
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@nashou
Got a offtopic question..
I want to remove the audio crap from the VIM..
Could you tell me what you removed from youre vim exactly? (So itīs audio free)
Thanx
Ronald
P.S.: Pictures for the Horizontal Deflection Board are down.. just sayin
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dvh99
Joined: 25 Dec 2009
Posts: 2158
Location: nederland
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| Posted: Fri Dec 09, 2011 12:12 pm Post subject: |
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look at the schematic of the 02 or 03p.
for 2035-02p:
r6-r3-r223-r220-r69-r54-r256-r251-r244-r249-r233-r231-r238
u36-u37
q14-q16
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Bodi79
Joined: 08 Oct 2011
Posts: 130
Location: Austria
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| Posted: Sat Dec 10, 2011 2:09 am Post subject: |
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Good morning ! (At least here)
I soldered through the night and finished more mods , thanks again nash for all the effort (and everybody else who contributed)
Will post my finished board pics as soon as all Boards are done (if anybody is interested)
A few minutes ago i noticed that my VIM is a 50-2035-03p 
My question is what mods on the VIM of this Revision would be suitable?
I went through the whole thread but i am still not clear what todo on the VIM
Cheers
Ronald
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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| Posted: Sat Dec 10, 2011 2:57 am Post subject: |
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I never got around to do any Vim Mods but hopefully this winter I will try to get to it, but no promises . What I was planing was adding a 1uf COG ceramic cap or tantalum on each side of the RGB chips and then a 22uf electrolytic low esr cap across the +5v/-5v pins on the RGB chips, also the same for the SD5401 and the AD835's. Also add more capacitance on the incoming 5 volt and 15 volt +/- rails of the board. Lifting the +/- 5 volt fuses and add a 220uh inductor to each in series with the fuse.
That is just a general idea. Id like to use all oscons if possible maybe for the 22uf caps on the chip rails.
there are some other ideas id like to try resistor wise in the video path.
Athanasios
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Bodi79
Joined: 08 Oct 2011
Posts: 130
Location: Austria
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| Posted: Sat Dec 10, 2011 10:47 am Post subject: |
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@Nashou66
Well i guess i will play Guinea pig this time. Got two weeks off from 23.December.
So a lot of time to solder and play around
Will assemble my machine as soon as all boards are finished and make some screenshots.
Than i will start with the VIM Mods you suggested and post my results and even more screenshots
so we got a comparison.
Thanx
Ronald
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Bodi79
Joined: 08 Oct 2011
Posts: 130
Location: Austria
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| Posted: Sat Dec 10, 2011 12:41 pm Post subject: |
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@dvh99
Me stupid.. could not find the schematics for the 50-2035-03p anywhere.
Maybe i am blind
Cheers
Ronald
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dvh99
Joined: 25 Dec 2009
Posts: 2158
Location: nederland
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| Posted: Sun Dec 11, 2011 12:02 pm Post subject: |
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bitte sehr,
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00-260335-03P.pdf |
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dvh99
Joined: 25 Dec 2009
Posts: 2158
Location: nederland
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| Posted: Tue Dec 13, 2011 8:07 pm Post subject: |
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dragan, did the clare parts work?
waiting for you before i put my uc3709 in  , received them a few days ago.
http://www.ti.com/lit/ds/symlink/uc3709.pdf
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draganm
Joined: 08 Mar 2006
Posts: 8990
Location: Colorado
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| Posted: Wed Dec 14, 2011 4:42 pm Post subject: |
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don't know yet, was sick for the last 10 days and too tired to work in the freezing garage. Plus there's this stupid NEC sitting on my bench I need to part out. Plan to get to it this week or no later than Christmas.
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dvh99
Joined: 25 Dec 2009
Posts: 2158
Location: nederland
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| Posted: Wed Dec 14, 2011 5:11 pm Post subject: |
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was just going to post a message.
i put one of the two uc3709n in (u1) and left the vreg in.
anyway, this chip works, i`m going to replace the other mc34151, then test and after all is well remove the vreg.
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dvh99
Joined: 25 Dec 2009
Posts: 2158
Location: nederland
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| Posted: Wed Dec 14, 2011 6:37 pm Post subject: |
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The recommended on state VGS is +20V and the recommended off state VGS is between -2V to -5V.
this is from the cmf10120d datasheet.
as of now i have a gate source voltage of 20 volt with the vreg lm317 minus a little drop across the diode and maybe a little drop because of the transformer T1.
i will leave the vreg in for now as it works perfect this way.
btw, both mc34151 are now replaced with the uc3709n.
scott, what would be the voltage drop if any across T1?
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tse
Joined: 03 May 2006
Posts: 1014
Location: Sweatbucket, Fl.
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| Posted: Thu Dec 15, 2011 1:34 am Post subject: |
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I believe that the transformer is 1:1:1:1. So an input of 24vpp should give 24v output. The clamp diode will offset the drive about -1V so turn off will be about -1V and about +23V for turn on. Maybe put two diodes in series so turn off is -2V and turn on is +22V. Please check the drive without the deflection rail connected (remove one of the big shunts on the HDM).
Scott
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dvh99
Joined: 25 Dec 2009
Posts: 2158
Location: nederland
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| Posted: Thu Dec 15, 2011 3:48 am Post subject: |
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the vreg is now gone.
scott i have put 2 diodes in series now, that was a good idea.
dragan, if you are going to use the sbyv27 you`d best place the diodes not on the backside of the board as there is not enough space.
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draganm
Joined: 08 Mar 2006
Posts: 8990
Location: Colorado
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| Posted: Sun Dec 18, 2011 6:40 pm Post subject: |
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ok, so it looks like this is still in the R&D phase 
| dvh99 wrote: | the vreg is now gone.
scott i have put 2 diodes in series now, that was a good idea.
dragan, if you are going to use the sbyv27 you`d best place the diodes not on the backside of the board as there is not enough space. |
I actually purchased the small ultra fast 100V SMD diode's Scott posted.
Your talking about putting 2 of the wire leaded Diode's in series like the factory did on the video neck-boards? If so, then yes, this will need to go on the front and the small 10K resistor on the back.
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Nashou66
Joined: 12 Jan 2007
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Location: West Seneca NY
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