Bob, >From Tech Repair CD: MITSUBISHI\VS402R\Unstable Convergence\\\\Check F8a0 And F8a1 For Open Condition And R8j7 Running Hot. Suspect Shorted Ic8a0\ Located On Pcb-Convergence. (266p38401)\\\\\\\
MGA\VS507\NO RASTER* NO SOUND* F8A0 & F8A1 FUSES OPEN* WILL DISPLAY\INTERNAL GENERATED CROSS HAIR PATTERN.\\\REPLACE FUSES F8A0 & F8A1 & CHECK TO SEE THAT Q8C2*Q8C3*Q8C5\AND Q8C6 ARE NOT TOO CLOSE TO THE RAISED EDGE OF THE\METAL SUPPORT RAIL EXTENDING FROM ONE SIDE OF THE CABINET.\THIS IS DUE TO A WEIGHT BEING PLACED ON THE VCR SHELF.\\\\\ 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 ----- Original Message ----- From: "Gemini Computer & TV" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Thursday, January 15, 2004 2:40 PM Subject: [Techs] Mitsubishi VS411R (blows F8A0 instantly) I have a Mitsubishi VS411R (still in the customer's home) that the customer complaint is that the picture was intermittenly jittering and bouncing for about a week with convergence separation, then the jitter stopped and the convergence was still out and was completely unresponsive to the customer convergence adjustments. I walked in to his home with new STK4274's and found that the 1.6 amp fuse (F8A0) was blackened and of course open. This fuse is for the +20 volt supply. The -20 volts was fine. I replaced the STKs and the fuse and within 2 seconds the fuse opens. I can find no obvious shorts or loads so I also replaced the STK4275 focus IC which also uses this supply and still have the same conditions. If I remove either connector "VY" or "VU" from the convergence board individually, the fuse does not blow but the resistors R8K6 and R8L2 (for connector "VY") or R8J7 and R8K3 (for connector "VU") will start cooking really quick due to no load. I do not have the service manual so I called Mitsubishi Tech Assist from the customer's home because I suspect either the red or blue yoke (part# 330P116010 which is NLA) might be the culprit but I had no way to tell which if either was it and Mitsubishi had no reports of this symptom and were at a loss of what else it could be or how to check the yokes. Before I condemn the set, I figured I would ask if anyone has encountered this previously as you all know I hate to concede defeat! 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 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 _________________________________________ Please include original text when replying to this email. Once you get your unit repaired, please post the fix to the group. Order your tech repair CD today, Version 3.0 only $49.00-more monitor tips-user friendly program. [EMAIL PROTECTED] www.tech-repair.net ______ Techs mailing list [EMAIL PROTECTED] http://intrepid-video.com/mailman/listinfo/techs_intrepid-video.com Go to the link above and scroll to the bottom to enter your email address _________________________________________ Please include original text when replying to this email. Once you get your unit repaired, please post the fix to the group. Order your tech repair CD today, Version 3.0 only $49.00-more monitor tips-user friendly program. [EMAIL PROTECTED] www.tech-repair.net ______ Techs mailing list [EMAIL PROTECTED] http://intrepid-video.com/mailman/listinfo/techs_intrepid-video.com Go to the link above and scroll to the bottom to enter your email address
