tag:blogger.com,1999:blog-1120987647049297737.post3347815731123974086..comments2024-03-02T21:35:08.721+03:00Comments on electronics repair made easy: Videocon 21' TV is not turning onHumphrey Mndakahttp://www.blogger.com/profile/11910022657325511431noreply@blogger.comBlogger13125tag:blogger.com,1999:blog-1120987647049297737.post-72853473578693660412015-12-27T20:05:45.374+03:002015-12-27T20:05:45.374+03:00Very niceVery niceASHOKhttps://www.blogger.com/profile/06162588611253261454noreply@blogger.comtag:blogger.com,1999:blog-1120987647049297737.post-2223249214615665522015-11-30T10:43:16.177+03:002015-11-30T10:43:16.177+03:00Hi Cj, all voltages are registered is not good eno...Hi Cj, all voltages are registered is not good enough for me to make conclusion, is the B+ present? if so is it normal? start from known to unknown.<br />Regards Humphrey<br />Humphrey Mndakahttps://www.blogger.com/profile/11910022657325511431noreply@blogger.comtag:blogger.com,1999:blog-1120987647049297737.post-24193639063914000972015-11-30T10:39:42.417+03:002015-11-30T10:39:42.417+03:00Hi Peter, long time, hope you are doing well that ...Hi Peter, long time, hope you are doing well that end, regarding your question on testing the base voltage of HOT or SOT, for the HOT the Dc voltage is very low but current is high courtesy of the drive transformer which act as impedance matching..usually this transistor fail by shorting collector-emitter junction and therefore if you measure that with a meter in diode mode and find low and high reading you can assume the hot is okay. for the SOT transistor here i expect some reading like 0.6 volts but if it is switching will get some funny reading but definitely not zero.in AC mode you will always get funny reading when both are switching but this is not recommended.<br />Regards Humphrey<br />Humphrey Mndakahttps://www.blogger.com/profile/11910022657325511431noreply@blogger.comtag:blogger.com,1999:blog-1120987647049297737.post-49624887224219498732015-11-29T09:01:56.319+03:002015-11-29T09:01:56.319+03:00if power LED is flash or blinking what that mean ?...if power LED is flash or blinking what that mean ? <br />technostorehttps://www.blogger.com/profile/01184350074505336877noreply@blogger.comtag:blogger.com,1999:blog-1120987647049297737.post-12880582340760444972015-11-25T22:24:00.866+03:002015-11-25T22:24:00.866+03:00Great artice. i really appreciate it.LG-Rp20ca10-c...Great artice. i really appreciate it.LG-Rp20ca10-chassis-mc83c-sm which has the res standby light but when i press the switch it goes off but nothing else happens. all voltages are registered but really don,t know what else to do. can somebody help. the switching is not staying on.even when the switch is pressed the other voltages are on up to the tuner. please help. the schematic can be found on the net. i could not email it. thanksAnonymoushttps://www.blogger.com/profile/17493666651144565184noreply@blogger.comtag:blogger.com,1999:blog-1120987647049297737.post-49878483944462037872015-11-25T16:59:42.814+03:002015-11-25T16:59:42.814+03:00Hi Humphrey,
That experience has also taught me so...Hi Humphrey,<br />That experience has also taught me something. I am currently working on the 14 Inch TV with standby light on but no HV. The B+ voltage detected is 110v and RGB voltage 110v too.<br />But would you<br /> please advise me on how to measure the voltage at the base of either HOT or SOT by using DMM. When I try to measure that with DMM range at 2vdc I get 0v. Then when I change to ac lower range, I get fluctuating figures.<br />How best do you measure these voltages. I am trying to match them with the correct voltages that are found in your book but fail. Please assist!!! <br />Peter Bwalya Mutale <br />Anonymoushttps://www.blogger.com/profile/03364803523072955257noreply@blogger.comtag:blogger.com,1999:blog-1120987647049297737.post-31601789895652195492015-11-25T09:18:20.857+03:002015-11-25T09:18:20.857+03:00Thank you very much sir.Thank you very much sir.Mahadev Pawasehttps://www.blogger.com/profile/06406900543981692922noreply@blogger.comtag:blogger.com,1999:blog-1120987647049297737.post-70307273719259096182015-11-25T08:48:39.393+03:002015-11-25T08:48:39.393+03:00Thanks and welcome Gideon
Regards Humphrey
Thanks and welcome Gideon<br />Regards Humphrey<br /><br />Humphrey Mndakahttps://www.blogger.com/profile/11910022657325511431noreply@blogger.comtag:blogger.com,1999:blog-1120987647049297737.post-53746242750206602122015-11-24T13:03:55.253+03:002015-11-24T13:03:55.253+03:00Interesting!!!
Thanks very muchInteresting!!!<br />Thanks very muchAnonymoushttps://www.blogger.com/profile/10834027676744541929noreply@blogger.comtag:blogger.com,1999:blog-1120987647049297737.post-17064230970449493712015-11-24T09:44:20.458+03:002015-11-24T09:44:20.458+03:00
Thanks for your feedback Beh.
Regards Humphrey<br />Thanks for your feedback Beh.<br />Regards HumphreyHumphrey Mndakahttps://www.blogger.com/profile/11910022657325511431noreply@blogger.comtag:blogger.com,1999:blog-1120987647049297737.post-21110925766683724232015-11-23T19:41:52.389+03:002015-11-23T19:41:52.389+03:00Hi Mr Kimathi
Thanks for this very analizingly art...Hi Mr Kimathi<br />Thanks for this very analizingly article .<br />Behbehzadhttps://www.blogger.com/profile/05844676726383148062noreply@blogger.comtag:blogger.com,1999:blog-1120987647049297737.post-51462021914620827282015-11-23T13:38:27.510+03:002015-11-23T13:38:27.510+03:00Hi Bala, Thanks and thanks for passing by my frien...Hi Bala, Thanks and thanks for passing by my friend.<br />Regards HumphreyHumphrey Mndakahttps://www.blogger.com/profile/11910022657325511431noreply@blogger.comtag:blogger.com,1999:blog-1120987647049297737.post-82472788686185570932015-11-23T13:27:09.412+03:002015-11-23T13:27:09.412+03:00Thanks for this contribution, we are frout of you ...Thanks for this contribution, we are frout of you sir.Anonymoushttps://www.blogger.com/profile/09345245771429485308noreply@blogger.com