tag:blogger.com,1999:blog-1120987647049297737.post5486800951296650261..comments2024-03-02T21:35:08.721+03:00Comments on electronics repair made easy: HOT transistor is continuously getting shorted after replacementHumphrey Mndakahttp://www.blogger.com/profile/11910022657325511431noreply@blogger.comBlogger18125tag:blogger.com,1999:blog-1120987647049297737.post-27322761742634109882021-12-16T23:55:50.522+03:002021-12-16T23:55:50.522+03:00Thank you 🙏 God bless you for sharing the knowled...Thank you 🙏 God bless you for sharing the knowledge Hlanguhttps://www.blogger.com/profile/01611498265235588582noreply@blogger.comtag:blogger.com,1999:blog-1120987647049297737.post-49272884925998626512021-08-27T10:59:08.935+03:002021-08-27T10:59:08.935+03:00The highlights above adds value to my journey in e...The highlights above adds value to my journey in electronics repair more so in crt TV. Anonymoushttps://www.blogger.com/profile/16463243248753513584noreply@blogger.comtag:blogger.com,1999:blog-1120987647049297737.post-91183939886044521102017-08-14T16:38:42.832+03:002017-08-14T16:38:42.832+03:00Means the yoke is shorted.
Regards HumphreyMeans the yoke is shorted.<br /><br />Regards HumphreyHumphrey Mndakahttps://www.blogger.com/profile/11910022657325511431noreply@blogger.comtag:blogger.com,1999:blog-1120987647049297737.post-59442611077718758862017-08-14T16:37:43.872+03:002017-08-14T16:37:43.872+03:00Means the yoke is shorted.
Regards Humphrey
Means the yoke is shorted.<br /><br />Regards Humphrey<br />Humphrey Mndakahttps://www.blogger.com/profile/11910022657325511431noreply@blogger.comtag:blogger.com,1999:blog-1120987647049297737.post-2957633976597085952017-08-12T18:30:41.554+03:002017-08-12T18:30:41.554+03:00hi sir...when horizntal yoke is connected then tv ...hi sir...when horizntal yoke is connected then tv dont turn on...when removed then ons.Anonymoushttps://www.blogger.com/profile/11465217513728037362noreply@blogger.comtag:blogger.com,1999:blog-1120987647049297737.post-63161872695631637602015-12-23T14:31:32.615+03:002015-12-23T14:31:32.615+03:00I am a regular reader of your blog.I had a philips...I am a regular reader of your blog.I had a philips crt tv model 14PT2004 which is having the problem of blinking the screen in AV mode. In channel mode(TV) it is not blinking. I measured the various voltages while the screen blinks. the following were my observations<br />1. All voltages are within limit<br />2. when blinking RGB out put from main IC fluctuate from 2.6V to 2V and a slight fluctuation in B+ voltage. Other fly back output like +13,-13 ect are stable.<br /><br />Please guide me in finding the fault. Thankyou<<--Cyberm@n-->>https://www.blogger.com/profile/02702373466106291257noreply@blogger.comtag:blogger.com,1999:blog-1120987647049297737.post-41766818376935975882015-12-21T10:17:04.383+03:002015-12-21T10:17:04.383+03:00Thanks for your input Mosbad, i concur with you.
R...Thanks for your input Mosbad, i concur with you.<br />Regards Humphrey<br />Humphrey Mndakahttps://www.blogger.com/profile/11910022657325511431noreply@blogger.comtag:blogger.com,1999:blog-1120987647049297737.post-35999344811581715782015-12-19T01:11:07.249+03:002015-12-19T01:11:07.249+03:00Hello Humphrey, I hv not reached you for quite a w...Hello Humphrey, I hv not reached you for quite a while. I say you are well done for all the enlightenment given to us always, keep it up brother and God bless you.<br />If I may be allowed to add something, HOT xsistor getting short can be traced to many areas as u hv righty mentioned, having done all these, while looking at the VCC filter cap of the Horz drive cct, we can also check the shape of d line drive pulse on d scope at the base of the H diive xsistor as well as the base of of the HoT for irrelivant spikes which can be detremetal to the flyback/eht production.<br /><br />mosbad.mosbdhttps://www.blogger.com/profile/09010155839459203978noreply@blogger.comtag:blogger.com,1999:blog-1120987647049297737.post-63022332727929407022015-12-17T15:57:53.715+03:002015-12-17T15:57:53.715+03:00Same thing as chopper transistor(the transistor wh...Same thing as chopper transistor(the transistor which switch the chopper transformer. I suggest you by my basic electronics course to learn more about his. regards Humphrey<br /><br /><br />Humphrey Mndakahttps://www.blogger.com/profile/11910022657325511431noreply@blogger.comtag:blogger.com,1999:blog-1120987647049297737.post-14501960009750152932015-12-17T14:59:16.610+03:002015-12-17T14:59:16.610+03:00WOW! please sir thanks for your help but what is t...WOW! please sir thanks for your help but what is this SOT about? is there an article about it? thanksAnonymoushttps://www.blogger.com/profile/17493666651144565184noreply@blogger.comtag:blogger.com,1999:blog-1120987647049297737.post-87405218409078960002015-12-17T13:37:07.984+03:002015-12-17T13:37:07.984+03:00Hi Cj, the purpose of using the bulb is to isolate...Hi Cj, the purpose of using the bulb is to isolate if the problem in on the primary side of the power supply or the secondary side of supply. so if the bulb lights well means the primary side is good and no need for any checking, if off then concentrate on the primary side. please note that HOT is not same as SOT, you seem to confuse the two. Regards HumphreyHumphrey Mndakahttps://www.blogger.com/profile/11910022657325511431noreply@blogger.comtag:blogger.com,1999:blog-1120987647049297737.post-83664714010257324202015-12-17T13:08:46.713+03:002015-12-17T13:08:46.713+03:00Thanks Edward for your feedback and passing by.
R...Thanks Edward for your feedback and passing by. <br />Regards Humphrey Humphrey Mndakahttps://www.blogger.com/profile/11910022657325511431noreply@blogger.comtag:blogger.com,1999:blog-1120987647049297737.post-44647086700620276292015-12-16T15:57:44.417+03:002015-12-16T15:57:44.417+03:00Hi HUMPHREY,I love your analysis of such situation...Hi HUMPHREY,I love your analysis of such situation.You are a guru that his not slf centered and love you for that.Keep doing for the love of humanity.EDWARD from NigeriaAnonymoushttps://www.blogger.com/profile/00518527085417513779noreply@blogger.comtag:blogger.com,1999:blog-1120987647049297737.post-18675253805634216912015-12-15T20:34:44.920+03:002015-12-15T20:34:44.920+03:00wow a NOBEL prize. i would really like that for yo...wow a NOBEL prize. i would really like that for you.Let's see what happens...now i'm i to understand that if the bulb remains on that the HOT should be good to go in the circuit?If it blows there must be something i have not checked that causes it to short right? thanks for the help and hope you Get the prize.Anonymoushttps://www.blogger.com/profile/17493666651144565184noreply@blogger.comtag:blogger.com,1999:blog-1120987647049297737.post-24801308524564238982015-12-15T14:10:23.904+03:002015-12-15T14:10:23.904+03:00Hi Cj, the take off should be before the flyback/a...Hi Cj, the take off should be before the flyback/after feedback circuit, when all is well the bulb should remain on...if off then the problem is the primary power supply.<br />NB.dis connect the B+ line just before the fbt and connect one leg of the bulb there and the other at the tuner ground. regards HumphreyHumphrey Mndakahttps://www.blogger.com/profile/11910022657325511431noreply@blogger.comtag:blogger.com,1999:blog-1120987647049297737.post-22193929443148266182015-12-14T21:09:54.125+03:002015-12-14T21:09:54.125+03:00great article but this question comes to mind. the...great article but this question comes to mind. the hot get shorted therefore it is said a 60 W bulb can be used, how do i connect this bulb and what happens to the light when the horizontal part has been fixed.. is it that the bub wil go out or should it remain lighted? please help.thanksAnonymoushttps://www.blogger.com/profile/17493666651144565184noreply@blogger.comtag:blogger.com,1999:blog-1120987647049297737.post-71085972831677798552015-12-14T08:30:31.139+03:002015-12-14T08:30:31.139+03:00hahaheheeee...Beh!!!!!!!!!!!!!!hahaheheeee...Beh!!!!!!!!!!!!!!Humphrey Mndakahttps://www.blogger.com/profile/11910022657325511431noreply@blogger.comtag:blogger.com,1999:blog-1120987647049297737.post-50557769284306964482015-12-14T04:00:09.515+03:002015-12-14T04:00:09.515+03:00Hi Humphrey
as you know i requested NOBEL prize in...Hi Humphrey<br />as you know i requested NOBEL prize in crt tv repair for you and fortunately your prize is approved by authorities and very soon you will receive this in Nairobi yes you deserve this prize and congratulations... beh behzadhttps://www.blogger.com/profile/05844676726383148062noreply@blogger.com