Thread: Sampo color
View Single Post
  #12  
Old 01-28-2022, 07:38 PM
Airedale's Avatar
Airedale Airedale is offline
Hobbyist
 
Join Date: Jul 2020
Location: Western Washington
Posts: 111
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.
Attached Images
File Type: jpg 20220128_172435.jpg (104.1 KB, 32 views)
File Type: jpg 20220128_170657.jpg (42.2 KB, 31 views)
File Type: jpg 20220128_172459.jpg (94.7 KB, 31 views)

Last edited by Airedale; 01-28-2022 at 07:50 PM.
Reply With Quote