1982 Zenith System 3 Problems

[NowhereMan 1966]

Originally Posted by zeno

OK Sams 2146-2 is the same style & year.
It uses 9-181-02 & 9-186-01
Cap I mentioned is C3496 & seems to be on the 9-181

NOTES
Early 9-181 used IC sockets, they were eliminated. You had to move the
IC's & 3 color outs to the new board. PIA

There were 2 types of start circuit. One used a transformer on the 9-181
the other a multivibrator on a PCB mounted on the hoz out heat sink.

9-186 comes mounted PCB only. You dont get the heat sink, small
parts etc. ( watch for overheated hoz yoke plug ! ).

BTW I have 2146. If you cant find a free one PM me for price MUCH
less than sams & a real quality printing, not a crappy PDF or Xerox.

73 Zeno
LFOD !

Come to think of it, I do remember the 9-181-02 was replaced years ago where the IC's were socketed. I watched the tech do it. I took a look and I'm right, they are in sockets. Even though it could be on the 181, I think the 186 might need replaced too since I did see some white retrace lines and before that, red ones on occasion. Are the 3 color outs IC's too, it has been a long time. I'm also interested in the SAM photofaact too you have, if you're going to work on something, it helps to have the literature to do it since this is my first time getting this deep so I want to be extra careful.