Early '70's 19" Panasonic B&W TV

[dieseljeep]

Originally Posted by Findm-Keepm

'Tis either an AN219A or AN229A - the non-A versions had the early logo. There was a later AN249/A, but I seem to recall those having a dark removable sunshield...differences in the 219/229 are only in the trim level - they all had the same innards.

Your open resistor is a dual, 3 ohms and 37 ohms. You'll notice the diode across the on-off switch - that provides the bypass for the instant-on feature. Cut the diode out if you want to kill the instant on. We did it all the time on those sets - a real CRT killer. BTW, the CRT is most likely either a 500JB4 or a 19VDGP4 (the worse of the two). That pigtail should be a 2-Ampere fuse.

Panasonic issued a bunch of mods for these sets - the 16" and 19" sets had vertical problems, mostly with the vertical output transformers opening. There was also a mod for fringe vertical hold issues, and changed the values of a couple of resistors in the vertical (300-series parts, IIRC).

What is the last two letters on the fly? DS=flammable type and PS=non-flammable type. Panasonic had a couple of these burn up flybacks and start a house fire in '71, so the "A" models had the new flys, and the non-A models had a "replace-at-next-service" replacement program for the flybacks. One of the vendors in the back of Radio Electronics apparently got the excess "DS" flybacks, and you could buy them for a buck each for a year or so. All the markings were removed, but a little sleuthing found out what they were.

Good sets, save for the junk CRT, and the CRT-killing instant-on....

Cheers,

The set in the picture looks to have the 19VDGP4 CRT.
I didn't think Panasonic products had all those problems.