RCA CTC169BD2 Chassis

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

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.