hardwiring a pcb mounted switch

[RichSorr]

Hey all,
in my store, theres a tv mounted in a cabinet that is connected to a blue screen and camera. Its a regular tv from walmart. Problem is, every morning someone needs to turn the power on with the remote, and select the video input. anyway we could hardwire the power button? I can't have any switches on the outside of the cabinet because of kids running around. just want it to turn on when we flip on the breakers. thanks

[qrz]

depending on age/make/model, u may be able to program it via user menu.  many sets have an "alarm timer" that will allow user to select turn on /off time and ch/input....
see owners manual for set specific details.....

qrz

[RichSorr]

we checked that. sadly it doesn't have it. which is weird because its only two months old, than again its a cheapy from walmart

[northerngames]

connect whatever to whatever input your getting upon power up or they also make converter adaters if needed becuase the ends differ.

[qrz]

 there might be an "ac on" feature in the service menus...
accessing the service menus are brand specific and
>>>NOT FOR PUBLIC USE<<<

pse provide the make/model and will see what i can find....(25+ yrs tv tech) 

qrz



 

[RichSorr]

its a ILO iwf2706




this. got the inputs figured out. Now I just need to get this button hardwired so the tv turns on when we turn the store breakers on.

[northerngames]

could try running your info here to see if anything comes back

http://manualsnguides.com/search.php?cmarque=ILO&modele=IWF2706

[RichSorr]

nada. 

anyone? I know it can be done. I called the manufacturers customer service and asked, but they wouldn't tell me how because the don't suggest doing it and it voids the warranty.weak.  I could care less about the warranty.

[qrz]

the set is most likely more cheap chinese junk...  the chinese are just as secretive of their tv products as they are
of the other *&%^% they sell 
 i will try to find some info - though, doubt will be succesful.....

one way of accomplishing the task is to design circuitry to activate the buttons in proper sequence ......

i did this on a cheap zenith (in '94) for display purposes.  how?
upon AC connection a reset pulse was generated for the uP. i  took this pulse through a buffered delay to activate a xistor paralleling the pwr sw. this turned set on . the pwr on xistor (again through a RC delay) would activate a second xistor paralleling the ch up sw ( for ch #).  that perticular set would pwr up on ch 2 whenever there was an AC interuption thus requiring the ch sw activation . ran this set problem free until sold.
this simple mod was easily removed as designed....returning set to original operation.

qrz

[Kevin Mullins]

Method 1:
Wonder if something like this would work on that TV. (?)
http://www.pealefamily.net/tech/newmame/captrick/

It had been discussed a bit about using this cap trick on tv's, but no real confimation on any that I know of. I think because it is dependent on the individual tv design.

Method 2:
You may also just try "jamming" the switch. (short the button permanently on)
You can test this theory just by holding the button down while turning the breaker off and on. (don't let go)

Some tv's require that you push AND then let go of the button in order to repeat the on-off cycle. But if yours will repeat the cycle on and off again with the breaker while holding the button down, then you should be able to use this method.


But none of this really helps if you still have to select the video mode each time you turn it on though. Unless you do something like mentioned by qrz to switch channels as well as powering on.

[qrz]

preliminary findings :  several oem's on this brand
funai/orion
tatung  888-482-8864  20" 23"27" 30"lcd,  42"plasma
akai
initial technologies  800-476-5156 ILO3200 32"lcd
ESI      800-476-3512  42"plasma

and worse , chassis' showing up under name brands .. toshiba , rca - more  

qrz

[RichSorr]

Its from Funai. I need to open the sucker up tomorrow to fix one of the video ins. I'll take a look at the chassis. thanks guys

oh, jamming the button is a no go, tried it when I first opened it

[SirPeale]

You could try something along the lines of my cap trick.  I think it would work in this instance.

http://www.pealefamily.net/tech/newmame/captrick/

which appears to be down at the moment...let's see if archive.org has it...

http://web.archive.org/web/*/http://www.pealefamily.net/tech/newmame/captrick/

[RichSorr]

Peale, I sent you a PM. I couldn't get into this thread from my phone for some reason.

The cap trick seems like it is what I need. I'm just wondering where abouts on the tv's chassis would I add the cap?(unless I'm missing the obvious)

thanks

[SirPeale]

You'd remove the power switch and place the cap in it's place.

I'd meter the voltage there to make sure you get a cap large enough (and to make sure you get the cap in the correct way).

[RichSorr]

gotcha, I'll give it a shot tomorrow morning. thanks a bunch

[SirPeale]

Just be careful!  Doing this with a live motherboard is one thing; with a live TV is completely different.

Just remember, you want a cap that's small in value.  If 10uf doesn't work, try something smaller.

[qrz]

newer tv ctl panels are uP controled . this means there is always data activitly (keyscan ) present on the sw's .

placing a cap across a ctl panel sw may disrupt the uP, likely causing lockup or erratic operations .....

and still looking for serv lit 

qrz

[SirPeale]

Interesting, qrz.  It may or may not work then.  I think it might, because the front switches are still just momentary switches.

[RichSorr]

Interesting, qrz.  It may or may not work then.  I think it might, because the front switches are still just momentary switches.

Thats what I'm thinking. Also, this unit has the bare minimum when it comes to, well, pretty much everything. If I mess it up, I'll take it back to wal mart and get another . I took off work today so I can sleep off my new years hangover. Hopefully I can try to get this thing done tomorrow, I'll let post the results.