Is the high voltage low and is there ringing on the HOT collector waveform? If so it needs the driver transformer. Jerry Silverman Greentron Inc 4 Newland Ave Greenville SC 29609 864 232 3889 Fax 271 2080 mailto:greentron@xxxxxxx ----- Original Message ----- From: "Intrepid Video Support" <support@xxxxxxxxxxxxxxxxxx> To: "Techassist" <techassist@xxxxxxxxxxxxx> Sent: Wednesday, August 06, 2003 5:42 PM Subject: [TechAssist] Orion TV TV2501B..No video; Audio, HV OK.(2001) > > No schematic. > This set came in with no video. HV and audio are fine. CRT filaments are lit. > No G2 voltage, I do have 140x3 on CRT pins, but no other voltages. > B+ is 135.8 > I am leaning towards the vertical IC. > I have 26.7 on 2; 27.5 on 3 and 13.3 on pin 5. It is a LA78041 > I suspect the vertical IC because the heatsink for the HOT(2SD2499)/vertical IC gets really hot after a > few minutes. > I verified the vertical chip was running hot by cooling it down and placing fingers on both components > and the vertical IC roasted first. I also checked the HOT which seemed fine..has an internal diode that > tested. > I increased the G2 and still no raster. Has anyone no this IC to cause no video, before I order one? > Thank you. > > > Jeff Dougherty > Intrepid Video TV/VCR > 263 S Front St > Steelton PA 17113 > ph..717-939-7708 fax...717-564-4952 > www.intrepid-video.com www.tech-repair.net > > **************************************************************************** * > Classifieds! Buy or Sell! > http://sell.tech-assist.org > The Tech Address Book: > http://www.tech-assist.org/secure/tip/contact.htm > Add a Repair Tip Here, or Change/Remove your Email Address: > http://www.tech-assist.org/secure/tip/main.htm > Lost Password: > http://www.tech-assist.org and select "Lost your Login Info?". > Email Archives: > //www.freelists.org/archives/techassist/ > ***************************************************************************** Classifieds! Buy or Sell! http://sell.tech-assist.org The Tech Address Book: http://www.tech-assist.org/secure/tip/contact.htm Add a Repair Tip Here, or Change/Remove your Email Address: http://www.tech-assist.org/secure/tip/main.htm Lost Password: http://www.tech-assist.org and select "Lost your Login Info?". Email Archives: //www.freelists.org/archives/techassist/