TV/VCR/Stereo Troubleshooting/tv repair

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Expert: Henry A. McKelvey - 7/3/2009


Question
I have done some tv repair. I just got a older mitsubishi cs-3535r. When i got it it would not work. After  week i plugged it in and it worked fine. The next day i took it to our camp and it was fine for 3 days. then I unplugged it and plugged back in and you hear a click but no picture. after about an hour i tryed it again and it was working again. I unplugged it again and the same thing you hear it click but no picture. could this be a power supply. if not what could  i check.

Answer
Hello Ron,

This is a power supply issue, and it is hard to nail down because this power supply is exposed to most of the circuits in the TV unlike TVs now that have a main power supply and a switching power supply that are technically isolated from each other. You power supply is being shut down by a shut down circuit which is sensing high current events. In your case most likely an increase in current in the high voltage section. I would check the horizontal output transistor, the flyback transformer, and the HV safety capacitor.

These are the usual problem in these sets. Also do the standard checks to

1) fuses

2) open or shorted diodes

3) open or shorted transformers

I hope this helps,

Thank you,

Henry A. McKelvey - CBT, CET, CWNA

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

TV/VCR/Stereo Troubleshooting

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Henry A. McKelvey

Expertise

I have worked in the Electronics field for 25 years, and have been a Telecommunications Expert for 20 years. My Expertise has been in: Video, Audio, RF, Television, and Stereo. I have been in the Television repair business for 25 years and have repaired over 20,000 Televisions in that time. I was a manager of an Information Technology Training Team at The Verizon Advanced Services Group Center, and a Distinguished Member of Technical Staff at Verizon Laboratories. I am now working full time in the TV repair industry until I can find another full time job, I know what your question is: "why don't you just work full time in the TV repair industry permanently?" Well the answer to that is simple, due to the complexity and the DIY craze, TV repair work is at best a good way to make extra money, not to rely on it for your livelihood. A sad truth, but a truth nonetheless.

Experience

25 years as an Electronics Repair Technician, 20 years as a Telecommunications Expert, and I love Electronics.

Organizations
The Society of Broadcast Engineers (SBE) The International Society of Certified Electronics Technicians (ISCET)

Publications
On-Line: http://www.fixya.com/users/shuttle83 (solutions to repair issues)
US Patent and Trade Office: (Copy and paste the link below)
http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=0&f=S&l=50&TERM1=McKelvey&FIELD1=&co1=AND&TERM2=Verizon&FIELD2=&d=PG01

Education/Credentials
University of Phoenix (MSCIS working on) University of Phoenix (BSIT 2006) World College CIE (BTEE 2006) Cleveland Institute of Technology (ASEE 2006) National Education Center (Diploma in Commputer and Network Technology 1989) TESST Electronics School (Diploma in Electronics Engineering Technology 1985) AG Bell Vocational High School (Diploma in Electronics Repair (Radio and Television Repair 1983)

Awards and Honors
Society of Broadcast Engineers Membership (July 2006) Special Technology Achievement & Recognition Award (STAR Award) August 2004 (ISO 9000 Certification VTO-SIT) CWNP Certified Wireless Network Administrator (June 2004) Special Technology Achievement & Recognition Award (STAR Award) September 2003 (MSN Project) Special Technology Achievement & Recognition Award (STAR Award) November 2003 (Client CD and Registration Server Issue) Network Management Certification (ICCP)(2002) Data Communications Engineer Certification (Global Knowledge)(2002) TCP/IP Network Analyst Certification (ICCP) (2002) Winners Circle Award for Development of the DNOC Provisional training Team (2001) FCC License General Radiotelephone without endorsement (1985) FCC License General Radiotelephone with shipboard RADAR endorsement (1985) Certified Electronics Technician Certificate (Electronic Communications)(1989) Certified Electronics Technician Certificate (Consumer Electronics)(1985) 6 Patent Applications on file (do google search on "Henry A. McKelvey")

Past/Present Clients
See http://www.fixya.com/users/shuttle83
http://www.google.com/search?hl=en&rlz=1T4DMUS_enUS243US243&q=%22Henry+A.+McKelvey%22+TV+Repair&aq=f&oq=&aqi=

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