Bob, Seems I had similar awhile back. Check very close and solder pc connects as much as you can in Fly, HOT & horiz drive area. GL & HTH "joe" ================================== [EMAIL PROTECTED] From: [EMAIL PROTECTED] (Gemini�Computer�&�TV) Date: Mon, Feb 16, 2004, 8:04pm To: [EMAIL PROTECTED] Subject: [Techs] Samsung TXK2754 with repeat horizontal output failure Reply�to: [EMAIL PROTECTED] (ELECTRONICS PROFESSIONALS LIST) I currently have a Samsung TXK2754 that was serviced by another servicer in the past about 4 or 5 times for a dead set according to the customer (she recently moved into my area). I found the horizontal output transistor shorted and this had been replaced by the other servicer (I could find no evidence that any other parts had been replaced at any time). I ordered parts directly from Samsung and installed them this past Thursday and the set ran continuously until at least 1pm on Saturday when we closed (I came in this morning and found the unit dead again with the output transistor shorted again). The B+ was rock steady at 135 volts, the horizontal waveform was perfect, and the set was looking good prior to dying again. Here is the list of parts I replaced:
Q401 (HOT) (KSD5703, Samsung # 0502-001136 T444S (Flyback) (FUH-29A001A, Samsung# AA26-00013A) D805 (135 V rectifier) (F10U60S, Samsung# 0402-001358) Does anyone have some suggestions as to why the HOT keeps shorting (and it is "normally" cool with no signs of overheating)? Bob Waterman, CET� #RI-28 Master Technician License #9109 Service Manager / Parts Manager Gemini Computer, TV, & Security Alarms (508)695-7302 (508)695-7769 FAX [EMAIL PROTECTED] [EMAIL PROTECTED] www.geminicomputertvsecurityalarms.com ______________________________________________ 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 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
