radiotvnut
08-02-2007, 04:42 PM
Hi,
I have a Zenith System 3 (model SB2531N6) from '85 that is dead. This uses the 9-214 main module and a 9-187 sweep module. I have 160 volts at the HOT collector and a brief start up pulse of approx. 60 volts from the start up board. I checked all the transistors on the 9-187 and most of the electrolytic caps. I also resoldered some bad connections on both boards. The only bad part I found was the 10uf,315V cap on the main module. I remember this cap causing the picture to be darker on one side of the screen. I used to see a lot of this type of chassis and it always stumped me (along with other guys I know that fixed TV's for a living). I remember seeing some of these where one module would fail and take out the other board. I can't see buying two new boards for this set; but, it's too nice to throw out. I do have the Sams (2443-2) for this chassis. If it helps any; this chassis is similar to the cheaper 9-181/9-186 chassis. If anyone has any suggestions for what might be the problem; please let me know.
Thanks for your help,
Bryan
I have a Zenith System 3 (model SB2531N6) from '85 that is dead. This uses the 9-214 main module and a 9-187 sweep module. I have 160 volts at the HOT collector and a brief start up pulse of approx. 60 volts from the start up board. I checked all the transistors on the 9-187 and most of the electrolytic caps. I also resoldered some bad connections on both boards. The only bad part I found was the 10uf,315V cap on the main module. I remember this cap causing the picture to be darker on one side of the screen. I used to see a lot of this type of chassis and it always stumped me (along with other guys I know that fixed TV's for a living). I remember seeing some of these where one module would fail and take out the other board. I can't see buying two new boards for this set; but, it's too nice to throw out. I do have the Sams (2443-2) for this chassis. If it helps any; this chassis is similar to the cheaper 9-181/9-186 chassis. If anyone has any suggestions for what might be the problem; please let me know.
Thanks for your help,
Bryan