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I cleaned the TVs outside and opened the case to blow it out, heres what I found out.
1. Wear a mask and goggles next time!
2. On the inside diagram it says the tube is a Hitachi cs-13A , but on the tube it says Hitachi 379ECB22-TC06.
3 the i.c's are all NEC brand, the huge one is marked upc580c, but had no build date.
4. The tuner is a Mitsumi Elec. Co. LTD with a build date of June 1983.
5. The Sharpness control on the back has been repaired with a trio of resistors in parallel.
6. The channel knob was broken and badly repaired.
I'd like to determine the correct resistor to replace the 3 that are soldered together.
I can't find my deoxit, so I just ordered more. I'll try cleaning the touchy tuners when it arrives.
Beyond these minor issues I am loving this old set.
Last edited by Airedale; 01-28-2022 at 07:50 PM.
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