Magnavox 32MF369B/F7 volume stuck

[dskall]

Re: Magnavox 32MF369B/F7 volume stuck

In earlier post 25 where you were testing resistance of switches, it looked like they were being tested across pads with no switches and you said you got 0 whether you pressed switch or not. Do the other buttons work?

[hairywbush]

Re: Magnavox 32MF369B/F7 volume stuck

top/left side is the power

[hairywbush]

Re: Magnavox 32MF369B/F7 volume stuck

In earlier post 25 where you were testing resistance of switches, it looked like they were being tested across pads with no switches and you said you got 0 whether you pressed switch or not. Do the other buttons work?

i know the menu and power button work. if the menu is not up, it works but volume is stuck on 100

[attainteddragon]

Re: Magnavox 32MF369B/F7 volume stuck

just read through the thread again and i'm not sure why it is 4 pages long.

can you resistance test the points that i highlighted, with and without the button pressed and report back thanks.

[hairywbush]

Re: Magnavox 32MF369B/F7 volume stuck

what am I resistance testing? r114?

[attainteddragon]

Re: Magnavox 32MF369B/F7 volume stuck

no, the legs of the buttons that i marked. one is volume up and the other is volume down.

[hairywbush]

Re: Magnavox 32MF369B/F7 volume stuck

I went ahead and made a diagram of my readings. Have a look.

[attainteddragon]

Re: Magnavox 32MF369B/F7 volume stuck

no power applied.
you are doing resistance tests (ohms), not voltage testing.
the buttons in question are the volume up and volume down.
we need the readings when button is pressed and when it is not pressed.

[hairywbush]

Re: Magnavox 32MF369B/F7 volume stuck

it's still on the paper I scanned. resistance testing, power off, buttons down & up, straight across

[attainteddragon]

Re: Magnavox 32MF369B/F7 volume stuck

so your saying that both buttons are stuck on, what about all of the other buttons?

just looking over it again, you listed power off and power on, so i would assume you are applying power.

what are you saying by this then?

[hairywbush]

Re: Magnavox 32MF369B/F7 volume stuck

what do you mean what am I saying?
here's the rest. power is off.

[dskall]

Re: Magnavox 32MF369B/F7 volume stuck

We need to know what your readings are ohms , Kohms , Mohms , volts , ac , dc

[attainteddragon]

Re: Magnavox 32MF369B/F7 volume stuck

we need to get to the bottom this, so i have taken a few pics of what you should be seeing.

pic 1, no resistance across the button.
pic 2, power button pressed, low resistance shown.
pic 3, resistance across leads (with my croc clips attached), should be the same as when button is being pressed.

on a side note, i can't believe that i had 1.15 ohm resistance on the croc clips. :/

the issue that we may be having could be that the pin out on the buttons isn't actually running across it, but top to bottom, so try connecting your leads in that order and see if you can get an accurate reading.

just in case, this is not the same set of buttons as what you have, just a stock part.

[dick_barton]

Re: Magnavox 32MF369B/F7 volume stuck

Post #10 shows the probable pin connections. Two pins should be shorted together once you find those you then know that the remaining two pins are also connected together. Now you need to put your meter set to ohms between the two pair of connected pins. Press button and take an ohms reading. All carried out with the power off

[hairywbush]

Re: Magnavox 32MF369B/F7 volume stuck

We need to know what your readings are ohms , Kohms , Mohms , volts , ac , dc

ohms

we need to get to the bottom this, so i have taken a few pics of what you should be seeing.

pic 1, no resistance across the button.
pic 2, power button pressed, low resistance shown.
pic 3, resistance across leads (with my croc clips attached), should be the same as when button is being pressed.

on a side note, i can't believe that i had 1.15 ohm resistance on the croc clips. :/

the issue that we may be having could be that the pin out on the buttons isn't actually running across it, but top to bottom, so try connecting your leads in that order and see if you can get an accurate reading.

just in case, this is not the same set of buttons as what you have, just a stock part.

jumping my tester leads shows 1.3 ohms.
as for the new readings, see the picture I just wrote out. for some reason, 'ch down' and 'menu' got cut off just a little.

Post #10 shows the probable pin connections. Two pins should be shorted together once you find those you then know that the remaining two pins are also connected together. Now you need to put your meter set to ohms between the two pair of connected pins. Press button and take an ohms reading. All carried out with the power off

I'm sorry I don't know which pins you're referring to. There are no pictures in #10 and #9 has 3 pictures.

[hairywbush]

Re: Magnavox 32MF369B/F7 volume stuck

bump

[fastvideo]

Re: Magnavox 32MF369B/F7 volume stuck

You should look at the IR receiver board.
The push button board is mechanically contacts, simple on/off functions.

[hairywbush]

Re: Magnavox 32MF369B/F7 volume stuck

I'm looking at it. This is what it looks like. Tell me what I should test.

[dick_barton]

Re: Magnavox 32MF369B/F7 volume stuck

ohms
I'm sorry I don't know which pins you're referring to. There are no pictures in #10 and #9 has 3 pictures.

Typo It should have read post# 20

[hairywbush]

Re: Magnavox 32MF369B/F7 volume stuck

Typo It should have read post# 20

have I not already done that and posted my findings?