Yup , it is because of the DC offset current to acheive 'centering'. Best: Eugene
Head Witch Doctor and Chief Bottle Washer Eugene Spooner , CET , AAS , NP Eugene's Carry-In TV 1417 Eastway Drive Charlotte , NC 28205 mailto:[EMAIL PROTECTED]
Bil Green wrote:
That's a new one. Really interesting. So if the CRT magnetic rings are not adjusted properly the convergence output ICs have been known to overheat? (even though the convergence looks fair).
Even the tech bulletin from Toshiba (for properly repairing the C & D line sets) didn't mention this. Sounds every bit as important as changing all six opamps (which they did suggest).
Thanks!
Bil Green PC 1000
Mammoth Lakes, CA 93546
760-924-1000 Monday, October 25, 2004, 9:57:56 PM, you wrote:
ES> Begging your Pardon ! Did you check the Magnetic Centering for each ES> CRT with customer control at Zero ? That would crank up the heat if they ES> were not in agreement as to 'center' ! :-)
ES> Head Witch Doctor and Chief Bottle Washer ES> Eugene Spooner , CET , AAS , NP ES> Eugene's Carry-In TV ES> 1417 Eastway Drive ES> Charlotte , NC 28205 ES> mailto:[EMAIL PROTECTED]
ES> Bil Green wrote:
Thanks Joe,
I can get a copy from Andrews much faster. Just don't need any other parts now and didn't want to place an order for one schematic. Need to wire in a fan to keep the convergence outputs cool.
Want to find a good 12V source. One chip is running hot and the customer doesn't have enough money to pay us to replace all the opamps (if that will even help - voltage at pins 1 and 7 check OK).
Already replaced the STKs and checked all resistors and caps on output board. Rather not have posted this many details, but don't like a few people saying "you should check..." - and I already have.
Bil Green PC 1000
Mammoth Lakes, CA 93546
760-924-1000
Monday, October 25, 2004, 2:09:04 PM, you wrote:
JT> http://www.tritronicsinc.com/
JT> Item #:050-638 (TOSHIBA) JT> Description:*NLA/WG TP48C50/51 JT> INVENTORY NOT AVAILABLE JT> ETA:CAN BE ORDERED JT> ================================== JT> [EMAIL PROTECTED] From: JT> [EMAIL PROTECTED](Bil Green) Date: Mon, Oct 25, 2004, 1:18pm JT> (EDT-3) To: [EMAIL PROTECTED] ([EMAIL PROTECTED]) Subject: [Techs] JT> Need Schem.- TOSHIBA TP48C51 (any C or D line) Reply to: JT> [EMAIL PROTECTED] (ELECTRONICS PROFESSIONALS LIST) JT> ================================== JT> Need Schematic for Toshiba TP48C51 or similar Any Toshiba C or D line JT> print may be close enough JT> Thanks JT> Bil Green JT> PC 1000 JT> Mammoth Lakes, CA 93546 JT> 760-924-1000 JT> ______________________________________________ JT> Tech Repair CD...order your just $49.00 plus shipping...One year of JT> updates free. www.intrepid-video.com www.tech-repair.net JT> Techs mailing list JT> [EMAIL PROTECTED] JT> http://intrepid-video.com/mailman/listinfo/techs_intrepid-video.com
JT> Joes....Electronics JT> (Joe:Tech/2004) JT> [EMAIL PROTECTED] JT> Fax::509-479-2283
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