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Author Topic: got my moded duo back no screen shown  (Read 1917 times)

thesteve

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Re: got my moded duo back no screen shown
« Reply #30 on: September 14, 2012, 05:25:25 PM »
heres the circuit


as spec'd it should push 0.9V to 1.1V of luma into a 75ohm load.
now i suspect his tv is not providing a 75ohm load.
if he had a meter we could find out.
if his tv is 100ohm he will need another 25-30 ohms added to the luma line. (most likely)
it could also not like DC coupled luma (unlikely as most DVD players use DC coupling)
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8bitForLife

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Re: got my moded duo back no screen shown
« Reply #31 on: September 14, 2012, 07:20:45 PM »
http://shop.panasonic.com/shop/model/TC-L42D2?t=specs&support#tabs

this is the model of my tv not sure if this helps
« Last Edit: September 14, 2012, 11:54:34 PM by 8bitForLife »
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ApolloBoy

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Re: got my moded duo back no screen shown
« Reply #32 on: September 14, 2012, 10:06:55 PM »
Quote from: Hewitson on September 14, 2012, 02:05:28 PM
I might be an a-hole, but at least my work is of a professional standard.
Then show it, bucko.
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it makes me laugh because people are like I REMEMBER PLAYIN THAT BACK IN THE DAY, MAN THAT WAS FUN.

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Drakon

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Re: got my moded duo back no screen shown
« Reply #33 on: September 14, 2012, 11:56:28 PM »
Yeah thesteve is the man.  Guess that rules out bad modding.

Quote from: 8bitForLife on September 14, 2012, 04:37:02 PM
Its my console thesteve worked on his work is top notch we think it might be some unknown compatibility as the mod is working and it shows graphics on the y input in black and white with composite so its able to handle the 240p over component. So he think we could make a pass through cord of some kind if im correct in that's what hes thinking. Its just hard as i have no electronic knowledge whats so ever in this kind of work. I plan on taking a class at the college here and also a Cisco class after December.
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http://16bitgamer.forumotion.ca/

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Firebomber7

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Re: got my moded duo back no screen shown
« Reply #34 on: September 15, 2012, 02:42:17 PM »
Quote from: Hewitson on September 14, 2012, 03:37:13 AM
Sorry, but I think that is rubbish. I have NEVER used hot glue in any of the modifications I've done, and I have NEVER had a single solder joint or plug/socket come loose.

As far as I'm concerned, only cowboys use glue.
Now where have a I read this before, hmmm...

What other forums are you on?
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NightWolve

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Re: got my moded duo back no screen shown
« Reply #35 on: September 15, 2012, 02:54:21 PM »
Quote from: Drakon on September 14, 2012, 11:56:28 PM
Yeah thesteve is the man.  Guess that rules out bad modding.

Steve is da man? Wrong, steve is a rough-riding cowboy if you ask me!!! All that damn glue he splatters everywhere! THAT'S why his mod isn't working right now!! Damn cowboys!!!!!! ;)

 :lol: :lol: :lol: :lol: :lol:
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HercTNT

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Re: got my moded duo back no screen shown
« Reply #36 on: September 15, 2012, 03:00:10 PM »
I just had this vision of steve riding a donkey, caulking guns akimbo hooked up to air compressors and a laser sight, gluing turbo's from 300 yards away. Hewiston's standing not far away shaking his fist at him :)
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Mathius

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Re: got my moded duo back no screen shown
« Reply #37 on: September 15, 2012, 03:10:12 PM »
Quote from: HercTNT on September 15, 2012, 03:00:10 PM
I just had this vision of steve riding a donkey, caulking guns akimbo hooked up to air compressors and a laser sight, gluing turbo's from 300 yards away. Hewiston's standing not far away shaking his fist at him :)
Hewitson says...
Quote
Hewitson-You dirty rotten good for nuthin' heifer f@cker! Your a disgrace! A DISGRACE!
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HercTNT

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Re: got my moded duo back no screen shown
« Reply #38 on: September 15, 2012, 03:21:34 PM »
LOL. and yet we all know the quality of steve's mods and don't know shit about hewiston, go figure.
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8bitForLife

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Re: got my moded duo back no screen shown
« Reply #39 on: September 15, 2012, 10:54:45 PM »
well we figured out what was wrong but i dont have any money for me to send it back.
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Drakon

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Re: got my moded duo back no screen shown
« Reply #40 on: September 16, 2012, 12:49:06 AM »
Quote from: 8bitForLife on September 15, 2012, 10:54:45 PM
well we figured out what was wrong but i dont have any money for me to send it back.

Mind sharing what the problem is?
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8bitForLife

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Re: got my moded duo back no screen shown
« Reply #41 on: September 16, 2012, 02:18:37 AM »
it was under powered and needs a resister added i believe is what he said and to make sure it works when i get it back he would put a pot on it so i can adjust it to make sure it works.
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thesteve

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Re: got my moded duo back no screen shown
« Reply #42 on: September 16, 2012, 05:44:55 AM »
specifically the matching resistor i used 75ohm 1VPP is too much resistance for his TV input.
in studying other devices, i found there is no standard for luma level (devices running anywhere from 0.7VPP to 2.3VPP)
im adding a pot to allow adjustment from 0.5VPP to 2VPP
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thesteve

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Re: got my moded duo back no screen shown
« Reply #43 on: September 21, 2012, 05:42:26 AM »
its back at my place
the chroma drive transistors got damaged during the testing i had 8bit do on his end.
i replaced the transistors restoring color.
i bypassed R14 bumping luma up to 1.8V
this caused a slight loss of detal

the pots to make it adjustable are not here yet
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NightWolve

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Re: got my moded duo back no screen shown
« Reply #44 on: September 21, 2012, 03:26:44 PM »
Oh my, look at this! Looook at this! Rampant cowboyism on display on a professionally made digital thermostat, ladies and gentlemen!!! I had to change the batteries and lo and behold, THIS is what I discovered:



;)
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