RCA CTC169BD2 Chassis

[Marc]

I am working on the subject TV set and it's stuck in standby. Does anyone
know where I can get the dead set troubleshooting guide that covers this
chassis? This TV has a complex set of protection circuits!
Thanks,

Marc

 

[Haywire1]

What do the +143V and the +15V supplies measure in standby? This is one
of the simplest and most reliable Thompson chassis ever built. Nothing
complex about it. Protection circuits usually activate after at least an
*attempt* to start.

If the +143V is too high in standby (over 155V) replace the 2.2uf, 15uf,
and 39uf or 47uf capacitors in the power supply front-end. If the +143V is
o.k. in standby, but the +15V supply is less than 12V or so, replace CR4118.
If the +143V supply is zero, your supply is not running, or is in over
current protection. Check for a shorted HOT and associated components (Yoke
return cap, pincushion diode and cap). If all seems good, and set makes no
attempt to start, check for a tied-up keyscan. If you lack a 'scope, have
no spare keyboard, and have the time, try removing the switches from the
keyboard and using the remote to turn on via IR codes. Without me writing a
book, check this stuff 1st, as it covers 90% of the problems this chassis
has ever shown.


"Marc" <marcfb@comcast.net> wrote in message
news:3uKdnW5A-d9PBTXVnZ2dnUVZ_hydnZ2d@comcast.com...

I am working on the subject TV set and it's stuck in standby. Does anyone
know where I can get the dead set troubleshooting guide that covers this
chassis? This TV has a complex set of protection circuits!
Thanks,

Marc