Quote:
Originally Posted by KV-1926R
After much struggling I got the set turned around and the back panel off. I just found a very faded sticker on the back with the model and chassis numbers. The sticker itself is discolored so badly it almost perfectly matches the rear panel. There's another one with a run number.
So Tom (zeno), what do the stickers tell you? I'm still a bit confused. I'm not sure what year the Chromacolor came out; I think '72 was the first year for the flat chassis Super Chromacolor. BTW, where's the volume stepper in this thing? I've got to find out where to shoot the DeOxit once I get some.
EDIT: Well, finding the problem with the tuner drive didn't take long. I was trying to find the rocker you spoke of when I noticed that the tab wheel was missing its screws. I don't have many around here, but I managed to borrow one from my 600X remote. That was enough for testing before it went out of alignment. The 600X remote works everything just fine, I just have to think of the button layout of a 500 when I use it. The orange button does nothing on this set, check. I guess it's off to the hardware store to get proper screws and lock washers.
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OK there are the usual "IIRC's" here but...........
Chromacolor came out in 1969. Flat chassis sets were referred to as
Super Chromacolors but I dont remember if the sets were marked that
way. Supers were also an improved Chromacolor CRT but I think its
only the HV went from 25KV to 30KV & maybe better phosphers.
Flat chassis probably started in 1971 B line but probably only
used as a test & show set, not known to be sold.
C line 1972 (25CC55) first year.
D line 1973 (25DC56) saw change in power supply.
E line 1974 ( ? 25DC56 again ?) last year, was replaced by upright
chassis (25EC45) part way through the year.
Stickers give the important details but I dont know the run #
scheme. Maybe a minor change in suppliers etc. to pinpoint
problems. I do know the 4 lead caps were only on sets
run 401 & higher E line uprights. before that they used seperate
caps like yours.
Volume stepper is only exposed relay in box on L side of set.
I dont remember them getting dirty so a little light tapping
around should pinpoint it. BTW The rocker is under the cardboard.
Caps: 2 on FBT & 3 underneath IIRC. Marked 22-5001. White bad,
orange good. Bad ones are hard on the HOT, tripler, focus divider &
CRT socket. If enuf go you get a spectacular arc show !
73 Zeno
