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Where to get a copy of astron rc 1732 schematic diagram.just want to veryfy what value of capacitor that has been exploded,so that i could replace it with the right one.thanks a lot for the concern..

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If you wish to get some details; check the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/ Circuit diagrams of many popular brand TVs and other devices are given.

Posted on Dec 04, 2016

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Show service diagram astron#1732


If you wish to get some details; check the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/ Circuit diagrams of many popular brand TVs and other devices are given.

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1 Answer

35 inch Mitsibutchi TV model #CS-35201A, serial #502637, manufactured 1993 TV made a popping sound when turned on and now only visable object is a straight horizontal colored line in middle of screen....


Hello dan82810,

The picture tube or CRT is not the problem, and yes this set is fixable. What has happened is that the vertical deflection circuit has malfunctioned. More precisely the vertical coupling capacitor has malfunctioned (The pooping sound was the capacitor exploding).

Open up your TV (take the back off and unplug the set), and look for the damaged capacitor, it will look puffy or if it has exploded.

To fix this problem you will need the schematic diagram for the TV (can be found at www.servicemanuals.net). Then you will need a multimeter to measure the DC voltages on the vertical output circuit, and finally an oscilloscope to measure the waveforms at the vertical output circuit and the input to the vertical windings of the deflection yoke transformer.

Now what you should basically find is a sawtooth wave at 60Hz which is the drive for the yoke transformer. However since the coupling capacitor is bad you will have the wave at the output of the vertical output stage, but not at the input of the yoke transformer. Use the schematic to find the value of the capacitor that has malfunctioned.

I hope this helps,

Thank you,

Shuttle83

http://www.electron-age-technologies-llc.com

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Hello winwithrose,

The popping sound may have been a capacitor. The chance are the capacitor is in the HV section of the TV set and is part of the supply to the Horizontal section of the TV. First if you do not have electronics experience I would suggest you take the TV to a qualified TV repair shop. OK now if you have electronics experience I would say to unplug the TV, open the set up and do a physical inspection of the TV you will be looking for a capacitor that has exploded; if you find one look at the schematic for the TV and find its value. Then do so checks to find out why did the capacitor explode. Most likely the capacitor exploded because of wear and tear, but it always pays to check. Replace the capacitor with one of the same value and then turn the TV on, use your voltmeter to measure the voltage across the capacitor to make sure its the same or close to the value on the schematic.

These are the basics of what to do

I hope this helps

Thank you,

Shuttle83

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