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Sanyo tv mmodel ST -21G1 Audio and video not working

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  • Sanyo Master
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Check and replace damaged component/s at its horizontal scan output section circuit. Check the LOT (Line Output Transformer) too for damage. Replace the horizontal scan output transistor. Check the input voltage to LOT. If the voltage is absent check the feeder resistor; if any. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/ Type in this key phrase " my service table today " in the search box at the top right of the the home page, to get gathered some pages which has the details of practical experiences of the author of that site. The search result will display about 20 Nos of related posts. Press the "All posts" at the bottom of the list, then you can select them one by one.

Posted on Dec 23, 2016

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Posted on Jan 02, 2017

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SOURCE: Sanyo ST-21G1 dead set

There should be a small valued cap in the primary side (22ufd?) at 250V. Check that. Also, look for other small caps int he range of 2.2ufd with 200V ratings in the same general area.
Dan

Posted on May 07, 2008

jingjao
  • 252 Answers

SOURCE: i have a resistor problem in sanyo ST-21G1

it's very difficult to give the exact value of that resistor.,but i can give some tips to find the value of the said resistor .( find how the resistor works, it is a dropping or fusable? if fusable used .47 or 1 ohm resistor if it is a dropping resistor you should make a trial and error .from 100k,10k or 1k.

Posted on Oct 29, 2008

johnnydiode
  • 647 Answers

SOURCE: sanyo tv model no. ST-21G1 power indicator is just

Check if Horizontal ouput is shorted.Check if you have B+ (135VDC) power supply and secondary supplies working(12VDC, 5VDC) and check if you have horiz. drive pulse from drive transformer.
A common fault for dead set is the capacitors in the power supply (secondary of transformer) - no 12VDC supply.

Posted on Oct 22, 2009

  • 1 Answer

SOURCE: sanyo st-21cf1 auto increase and decrease volume

bro my probleme ako may b+ pero wlang tao tapos maliit lang hindi naman sira ang vertical IC

Posted on Feb 17, 2011

gopakumarg43
  • 74459 Answers

SOURCE: Sanyo 21 ST-21G1 PROBLEM NO SOUND

check the speaker/s. If found OK; check and replace the damaged component/s at its audio output section circuit board. If needy, replace this board as card basis. If you wish to get some details; check the site linked here. Pull up older posts. Search the site by type in the "brand name" to your device; in the "Search box at the top right of the display window of the Homepage" to get gathered related posts.
http://electronicshelponline.blogspot.com/


26256212-j5n0jx0zu2it4cxa0oyyxk1d-2-0.jpg This is the related audio output section circuit to check.

Posted on Aug 10, 2016

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Sanyo tv model st-21g1 circuit daigram


If you wish to get some details; check the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/
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Fault at its main digital board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. http://electronicshelponline.blogspot.com/ In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.

Nov 22, 2016 | Sanyo Televison & Video

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Sanyo 21 ST-21G1 PROBLEM NO SOUND


check the speaker/s. If found OK; check and replace the damaged component/s at its audio output section circuit board. If needy, replace this board as card basis. If you wish to get some details; check the site linked here. Pull up older posts. Search the site by type in the "brand name" to your device; in the "Search box at the top right of the display window of the Homepage" to get gathered related posts.
http://electronicshelponline.blogspot.com/


26256212-j5n0jx0zu2it4cxa0oyyxk1d-2-0.jpg This is the related audio output section circuit to check.

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try replacing the audio circuit board of the tv.

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I had a problem like that so I disabled the tv's onboard tuner (input source)and now we use the cablebox's video and audio out to the video and video in jacks on the TV this will work as long as you have a cable box or sat reciever for your video and audio source and of course your TV must have video and audio inputs so it will work.

Good luck Rich

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1 Answer

Sanyo tv model no. ST-21G1 power indicator is just blinking it does not oscillate the horizontal output. what is the possible problem or parts to be replaced?


Check if Horizontal ouput is shorted.Check if you have B+ (135VDC) power supply and secondary supplies working(12VDC, 5VDC) and check if you have horiz. drive pulse from drive transformer.
A common fault for dead set is the capacitors in the power supply (secondary of transformer) - no 12VDC supply.

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No power


there might be the problem with the power cord or if connected to surge protector try and and connect directly to wall

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I have a resistor problem in sanyo ST-21G1


it's very difficult to give the exact value of that resistor.,but i can give some tips to find the value of the said resistor .( find how the resistor works, it is a dropping or fusable? if fusable used .47 or 1 ohm resistor if it is a dropping resistor you should make a trial and error .from 100k,10k or 1k.

Oct 29, 2008 | Televison & Video

1 Answer

Sanyo ST-21G1 dead set


There should be a small valued cap in the primary side (22ufd?) at 250V. Check that. Also, look for other small caps int he range of 2.2ufd with 200V ratings in the same general area.
Dan

May 07, 2008 | Televison & Video

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