Phil, How'd you make out checking the transistors on the green output (Q605, Q616, Q617)? John Myers Myers TV Service Co. 376 E. State St. Alliance, OH 44601 Voice / Fax: 330-821-6545 Myers_tv_b@xxxxxxxxxxxxx http://www.myerstv.net Work as if you were to live a hundred years, Pray as if you were to die tomorrow. Ben Franklin Phil Bader wrote: >update: >On the small signal (main) board,I found the jungle chip IC600 >(TA8845AN/483531057458) outputs R,G,B on pins 18,19,20 repectively. >Powered up and running, all 3 pins have same correct DC voltages. from >here, the 3 signals go thru a series of components including SMD >transistors, green buffer Q616, green clipper Q617, finally green driver >Q605 (other colors have same arrangement) From the last in line, green >drive Q605 outputs from it's emitter to connector J608 pin 5 (yellow >plug) where it go up to the green CRT board, and is "daisey chained" to >the other two CRTs. At this connector J608 is where the wide >discrepencies are. >J608 pin7(R) is almost zero vdc, pin5 (G) is +11.5VDC, and pin3(B) is >zero VDC. >So green is way up there. Preblem appears to be between where they leave >IC600 and where they exit the board to the CRTs. >But these are mostly all SMD, at front of board underneath, and running >the set to take readings is hard. >Tritronics has this board (or says their ASG119-TRI is a replacement >for) this main board at $99.95 exchange. >Am I foolish to persue component level repairs here? >Any TS-ing assist appreciated. >Phil Bader > >Philip Bader >Jan Phyl TV Inc. (estab. 1976) >3420 Recker Hwy. Winter Haven, Fl. 33880 >Fax (863) 299-8821 >email: tjanphyl@xxxxxxxxxxxxxxx > > > >Phil Bader wrote: > > > >>a ten year old 46 inch projection TV. >>I can power it on, has a bright green raster with retrace lines, I can >>see the OSD and tuner video behind the green. Has good sound. Customer >>said it happened after the storms last year (hurricanes). >>I don't have a service manual to know where to start. >>Corrupted eeprom? Video driver IC? >>Any known issues? >>Phil Bader >> >> >> >> >> >----------------------------------------------------------------------------- >This Email List is Public. Remove: http://www.tech-assist.org/remove.htm >Lost Password: http://www.tech-assist.org and select "Login Problems?". >Appliance Repair List: http://www.tech-assist.org/secure/tip/chatjoin.htm#app >Email Archives: //www.freelists.org/archives/techassist/ > > > > ----------------------------------------------------------------------------- This Email List is Public. Remove: http://www.tech-assist.org/remove.htm Lost Password: http://www.tech-assist.org and select "Login Problems?". Appliance Repair List: http://www.tech-assist.org/secure/tip/chatjoin.htm#app Email Archives: //www.freelists.org/archives/techassist/