Question about Philips Magnavox 50ML8105D 50" HDTV DLP TV

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Tuning Knob on Magnavox Astro Sonic Stereo

My grandma has an old Magnavox Astro Sonic Stereo and the tuning knob broke on it. I think it is from the 1960's. I know that a string was attached to the knob and the tuning box, but I can figure out how it worked because every time I put a tighter string on there, the knob will just slips and won't grip. I cant seem to figure out what could work

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5 Suggested Answers

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SOURCE: tuning

usually these sets have an install button near the channel volume button, enter it and make sure that before doing an auto install that you select the correct country before tuning.

Posted on Jul 09, 2008

djproaudio
  • 515 Answers

SOURCE: Magnavox Stylus

We need to know the model number of the CARTRIDGE itself. Doesn't matter what turntable you have. All that matters is what cartridge is mounted on the turntable, so that we can match the correct stylus. The stylus/needle connects to the Cartridge:

91e21a2.jpg
As the diagram shows, the stylus mounts to the cartridge, which then mounts to the headshell. This headshell is then connected to the tonearm (tube).

So, if you look at the cartridge you should be able to see the model number. If not, there is no way to match up the stylus, as ther are literally THOUSANDS of styli on the market. I would suggest purchasing a NEW cartridge/stylus combination. The following should fit your model:

UNIVERSAL MOUNT CARTRIDGES

c850b31.jpg

- Davis
DJ Pro Audio
www.djproaudio.com

Posted on Aug 10, 2008

  • 2 Answers

SOURCE: tuning

I have a hikona 14" tv havew lost the tuning manual. Can you help!

Posted on Sep 14, 2008

  • 135 Answers

SOURCE: I dont have a manual for my philips shelf stereo and I cant tune

http://www.retrevo.com/support/Philips-FW930R-manual/id/446bh839/t/2/

its here

Posted on Jan 18, 2009

  • 8457 Answers

SOURCE: channel tuning 1994 Magnavox 27'' TV

U the remote to turn to the channel 3.

Posted on Nov 18, 2009

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Click the clock button to the left of the cd slot and then turn the tuning knob to move it forward or back- then click the clock button again to do the minutes and move with tuning knob, then click clock button again to select either 12hour or 24 hour (military time- example 7pm=1900 hrs). the buttons with numbers on them are to save presets on the radio of your favorite stations- just push and hold the number you want it on after you have tuned it in with the tuning knob until it beeps and then it will be in the memory.

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Need a manual for an old sanyo tv,model number ctp 3104 .Do not know how to tune it in .thanks sue.


The silver around the knob on the right handside is for tuning and the knob in the middle is for fine tuning the signal in,
Hope this helps :-)

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I have 1 1959 zenith stereo and the tuner needs repaired, i have it apart. and there is a broken string on the end of a small metal spring, how do i put it on the tuner. i can turn the tuner wheel by hand,...


1......Use new dial cord, old dial cord becomes brittle and glazed over the years.

2....the tuning knob shaft should have 2 or 3 turns of the dial cord wrapped around it.

3....the tuning knob shaft should be clean.

4...if there are any small pulleys that the dial cord rides on for smooth operation, they should be clean and free turning.

The biggest things ( as you might have guessed ) are that everything that has the dial cord running over it should be clean and free to turn if necessary.

The little spring is there to keep tension on the cord, otherwise it would loosen once it streches with age.

If you need dial cord, I believe Sony still has some. You may need to contact the Sony parts distributor for your country, but I firmly believe that it is still available.

Good luck......Rob

Mar 04, 2008 | Audio Players & Recorders

1 Answer

Tuner


This sounds major.....

The signal detection used in both radios and TV sets is via special voltage sensitive diodes which alter capacity as the voltage across the diode changes.
You actually change the voltage across the diodes as you move the tuning dial.

In your case the diode only sees one voltage and is locked to a certain station, because you are not altering the capacity to re-tune to another station...

So it appears that you have lost the ability to alter the DC voltage across the diode...

The design of the tuning knob may be where this fault lies, where the physical action of turning the tuning knob does not transfer the mechanical action to the item that changes the DC voltage to the diode....maybe you have systen that uses a long cord would around pulleys that gives you nice control over the tuning maybe its just a broken tuning cord...
Maybe the tuning is done by just a simple variable resistor I'm not familiar with this system but I have given you the bascics to start on...Unplug the cord from the AC wall socket then remove the top of the cabinet and have a look to see what moves when you turn the tuning knob it will soon become apparent if there is nothing moving when you turn the knob and thus lead you on to the problem....
Maybe the knob is just loose on its drive shaft...

Cheers From YUBEUT

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