RCA PTK195AB , P52810LV projo instantly blows 5A AC fuse cust called ,said it started looking distorted,so he turned it off.Later it was totally dead. Sure enough. In the shop I found the main 5 amp AC fuse blown. No shorts found. Q14401 HOT OK, main v. regulator Q14101 OK. PS Rectifiers all seem OK.Rectifier bridge OK. Main capacitor [EMAIL PROTECTED] OK. BUT: Install a new 5A fuse ,simply plugping in the line cord instantly blows fuse. No shorts found Replace the Convergence power supply board (mounted above Converegence amp board) #205686 @$30 us Also remove bottom tuner cover and resolder all ground points and surrounding surface mounted caps . ================================== RCA PTK195AB ,P52810LV projo instantly blows 5A AC fuse
Unplug the AC cable near AC input that goes up to this board (red and black wires) replace line fuse and see if set turns on you won't have any convergence if turns on ok replace board or troubleshoot GL "joe" ================================== [EMAIL PROTECTED] From: [EMAIL PROTECTED] (Intrepid�Video�Support) Date: Fri, Jan 30, 2004, 9:56am To: [EMAIL PROTECTED] (Tech List) Subject: [Techs] TA RCA P52812AB(PTK195AB)Dead..Was conver. issue Reply�to: [EMAIL PROTECTED] (ELECTRONICS PROFESSIONALS LIST) I had a call originally on this for convergence going out after 30-60 minutes. Replaced STK IC U19700 and open R19233 (15K-3w). After replacing these, the set is dead...I double checked every connector many times and can not find the problem. S/B voltages seem find(no print)..Best I can do from my notes is, pin 5 of micro has 2.5v, press power, goes to 0 v. U14701 has B+, but 0v on either output. Replaced and still 0v..I disconnected the output from circuit and still 0v, replaced, same problem.. I measured these pins as I pressed power and the 5 volts for the output comes up, but the 12v goes to a couple volts, then to 0. I've tried the troubleshooting guides, with no luck...or they don't apply to this set. I am still at a loss what could have happened from the time I ordered these convergence parts and replaced them..any ideas? Thank you. Jeff Dougherty Intrepid Video TV/VCR 263 S Front St Steelton PA 17113 fax...717-564-4952 www.intrepid-video.com www.tech-repair.net ______________________________________________ Techs mailing list [EMAIL PROTECTED] http://intrepid-video.com/mailman/listinfo/techs_intrepid-video.com Joes....Electronics �(Joe:Tech/2004) [EMAIL PROTECTED] Fax::509-479-2283 _______________________________________________ Tech Repair CD...order your just $49.00 plus shipping...One year of updates free. www.intrepid-video.com www.tech-repair.net Techs mailing list [EMAIL PROTECTED] http://intrepid-video.com/mailman/listinfo/techs_intrepid-video.com
