More testing: If I disconnect any of the yoke connections the convergence P/S voltages all remain constant but the other two CRT's don't light up. Disconnecting any of the convergence yokes has no effect. I think my convergence P/S is fine, but what is making it shut down? TIA Kevin Wilks Kevin's TV & Video Repair Penticton BC Canada kevintv@xxxxxxx -----Original Message----- From: techassist-bounce@xxxxxxxxxxxxx [mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of Kevin Sent: Sunday, October 19, 2003 10:33 PM To: techassist@xxxxxxxxxxxxx Subject: [TechAssist] Re: RCA PTK195M26A, P46921, convergence problems I have done more testing, and I found that all of the voltages come up to their proper values and then disappear after 2-3 seconds. Except for the 23 volt line which remains on. I checked the convergence board and found no shorts. Is the convergence P/S supposed to work without a load connected? The voltages don't come up at all without a load. Thanks. Kevin Wilks Kevin's TV & Video Repair Penticton BC Canada kevintv@xxxxxxx -----Original Message----- From: techassist-bounce@xxxxxxxxxxxxx [mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of Intrepid Video Support Sent: Sunday, October 19, 2003 7:47 PM To: techassist@xxxxxxxxxxxxx Subject: [TechAssist] Re: RCA PTK195M26A, P46921, convergence problems Kevin, From Tech Repair CD: RCA\P52810LV PTK195AB\Convergence was pretty bad\Went into menu to pull up cust. convergence and it wasn't there\\PTK195AB\R19703 was open on convergence power board(750K 1/2watt)\\\\\\\\ RCA\PTK195\CONVERGENCE BAD* BOWED IN TOP AND BOTTOM* NO VOLTAGES J19701\\\\E-C SHORT ON Q19707(SMD) AMP ON CONV POWER 1 BD\\\\\\\\ RCA\PTK195\Loss of convergence appearing as a pincushion defect along with no convergence menu item\\\\Q19338 (227406) on the convergence PCB\The power supply was actually shutting down due to excessive current\\\\\\\ 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 Chicago ----- Original Message ----- From: "Kevin" <kevintv@xxxxxxx> To: <techassist@xxxxxxxxxxxxx> Sent: Sunday, October 19, 2003 7:35 PM Subject: [TechAssist] Re: RCA PTK195M26A, P46921, convergence problems > I checked the voltages and the convergence power supply is not working! > I changed 7 parts but must have missed one. The -45V, -15V are missing; > and the 45v line is 25v and drops as I measure it, and the 23v and 15v > are missing. Do you have a schematic for the new improved convergence > P/S? > This P/S has the fet and 4 small driver transistors. Thanks. > > Kevin Wilks > Kevin's TV & Video Repair > Penticton BC Canada > kevintv@xxxxxxx > > > -----Original Message----- > From: techassist-bounce@xxxxxxxxxxxxx > [mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of Wayne Vanaman > Sent: Sunday, October 19, 2003 12:53 PM > To: techassist@xxxxxxxxxxxxx > Subject: [TechAssist] Re: RCA PTK195M26A, P46921, convergence problems > > If there are no convergence options on the users menu it means that the > convergence IC is not talking to the main IC. This would happen on plug > in. > The thing thinks it is a direct view tv. > > What you need to do is > a. check for +- 15 and 40something on the diodes of the secondary, so > that > you know the power supply is working. > 2. ensure that the convergence ic has power supply, the coils I > mentioned. > III.ensure a "line of communication" between the convergence IC and the > main > ic. That is, see if there is data activity at the convergence IC at > plug > in. > > > Wayne Vanaman > Omega Electronics > 6904 W Fairfield Dr > Pensacola, Fl. 32506-3310 > > Wayne@xxxxxxxxxxxxxxxxxxxxx > WWW.PensacolaTVRepair.Com > > 850-456-5995 voice > 850-458-6369 fax > > > ----- Original Message ----- > From: "Kevin" <kevintv@xxxxxxx> > To: <techassist@xxxxxxxxxxxxx> > Sent: Sunday, October 19, 2003 2:31 PM > Subject: [TechAssist] Re: RCA PTK195M26A, P46921, convergence problems > > > > Hi Wayne, > > > > No, I could not find the convergence adjust menu options in the users' > > menu. I also noticed that the heat sinks on the convergence board are > > remaining cold when I leave the set on for 30 minutes. I am going to > > measure the voltages coming out of the convergence P/S as a start. > Off > > hand do you know what they are supposed to be? Thanks. > > > > Kevin Wilks > > Kevin's TV & Video Repair > > Penticton BC Canada > > kevintv@xxxxxxx > > > > > > -----Original Message----- > > From: techassist-bounce@xxxxxxxxxxxxx > > [mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of Wayne Vanaman > > Sent: Sunday, October 19, 2003 4:16 AM > > To: techassist@xxxxxxxxxxxxx > > Subject: [TechAssist] Re: RCA PTK195M26A, P46921, convergence problems > > > > Hi Kevin. > > > > Pull the shields off of the control area on the convergence board and > > see if > > that takes care of it. (Don';t leave them off, of course.) There was > > an > > "issue" with shield covers touch traces/parts causing problems. > > > > Of course there could be a defective power transistor, but I have seen > a > > few > > with open filter coils, again, under the shield covers. Do you get > the > > convergence adjust ment options ("Adjust Projection TV") in the users > > menu? > > > > Wayne Vanaman > > Omega Electronics > > 6904 W Fairfield Dr > > Pensacola, Fl. 32506-3310 > > > > Wayne@xxxxxxxxxxxxxxxxxxxxx > > WWW.PensacolaTVRepair.Com > > > > 850-456-5995 voice > > 850-458-6369 fax > > > > > > ----- Original Message ----- > > From: "Kevin" <kevintv@xxxxxxx> > > To: "TECH-ASSIST" <techassist@xxxxxxxxxxxxx> > > Sent: Saturday, October 18, 2003 9:02 PM > > Subject: [TechAssist] RCA PTK195M26A, P46921, convergence problems > > > > > > > Original problem was open 5amp main fuse caused by bad convergence > P/S > > > board. Replaced numerous parts in P/S (the newer design without the > > > STK's) and now the set fires up but the convergence is way off. Top > > and > > > bottom is pin cushioned for each gun. Any help would be appreciated > > as > > > the customer is moving on Tuesday morning and he lives 30 miles > away. > > > TIA. > > > > > > Kevin Wilks > > > Kevin's TV & Video Repair > > > Penticton BC Canada > > > kevintv@xxxxxxx > > > > > > ************************************************************************ ***** 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! 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