Thread Number: 73864
/ Tag: Other Home Products or Autos
1964/5 RCA CTC-17XE Color TV Problem |
[Down to Last] |
Post# 975728   12/27/2017 at 10:43 (2,311 days old) by speedqueen (Metro-Detroit)   |   | |
Checkrate/Likes
 
     
Well my mom finally did it, 6 months of leaving the television on almost 12 hours a day as background for the living room killed it. I've spent the last month poking around trying to find out why it made a loud pop and the brightness fell off sharply. Yesterday I got my answer. I powered up the set after replacing a few other parts only for it to flash a pinkish-purple on the screen and (gasp!) in the neck of the CRT. On another power up, only the green gun was working.
Luckily I have a replacement CRT lined up for it. My deadline for the repair is the first of January because we have a late Christmas party to host. Here are a few pictures of the chaos in my living room. |
|
Post# 975735 , Reply# 1   12/27/2017 at 11:21 (2,311 days old) by RP2813 (Sannazay)   |   | |
Checkrate/Likes
 
     
|
Post# 975741 , Reply# 2   12/27/2017 at 12:21 (2,311 days old) by speedqueen (Metro-Detroit)   |   | |
Checkrate/Likes
 
     
I'm no expert either(I can barely call myself a novice), I get a lot of advice from a friend who knows about this kind of thing.
The thing with TV repair is that you need a lot of extra test gear beyond a volt-ohmeter or DMM. For convergence, you need a pattern generator(I have a Sencore VA48 that does that and is also a sweep generator for alignment among other things). A high voltage probe is a necessity. It is also good to have a capacitor tester that has a high voltage(at least 100v) leakage resistance check function. |
Post# 983381 , Reply# 4   2/19/2018 at 10:57 (2,257 days old) by speedqueen (Metro-Detroit)   |   | |
Checkrate/Likes
 
3    
Well, after backburner-ing TV for a few months, I finally got around to fixing it and here is the result. I resoldered a few solder joints and it decided that it was going to work, I still think that the CRT is bad and liable to internally arc again, but I do have a spare in case that does fail terminally.
The color bars test pattern is courtesy of a local public access channel. Ignore the moire patterns. |
Post# 983384 , Reply# 5   2/19/2018 at 11:25 (2,257 days old) by Ultramatic (New York City)   |   | |
Checkrate/Likes
 
1    
|
Post# 983397 , Reply# 6   2/19/2018 at 12:00 (2,257 days old) by speedqueen (Metro-Detroit)   |   | |
Checkrate/Likes
 
1    
|
Post# 983415 , Reply# 7   2/19/2018 at 13:35 (2,257 days old) by rp2813 (Sannazay)   |   | |
Checkrate/Likes
 
1    
|
Post# 983459 , Reply# 8   2/19/2018 at 18:34 (2,257 days old) by speedqueen (Metro-Detroit)   |   | |
Checkrate/Likes
 
2    
Hopefully later this week I'll create another thread on replacing all the resistors on my '37 Zenith console radio. Why all the resistors, you may ask, they are all of the old "dogbone" shaped variety which are notorious for drifting in value. Someone had already, before I bought it, changed almost all the old capacitors. It sort-of works, currently but has trouble pulling in all but the strongest signals. I already took apart the volume control and switch which wouldn't click into the off position and had to be unplugged to turn the radio off.
|
Post# 983483 , Reply# 9   2/19/2018 at 19:39 (2,257 days old) by Ultramatic (New York City)   |   | |
Checkrate/Likes
 
     
I wish I had my folks Du Mont 25" color console from 1969. What a set that was. It was still working when it was disposed of. I remember fiddling with the color hue controls to get the colors just right. Until this day, I haven't found any ads of Du Mont sets from the late 1960's.
I'm looking forward to see more of your color sets! |
Post# 983515 , Reply# 11   2/19/2018 at 23:02 (2,256 days old) by speedqueen (Metro-Detroit)   |   | |
Checkrate/Likes
 
     
I haven't so much as found a replacement tube, but rather have a doner set that can contribute the tube. While that set works, it does so terribly(for example, the color won't lock until 1.5 minutes after power up, I changed the 6GH8a near the color crystal and it helped a little, but not much) as there are so many weak tubes. The CRT is fine, however. The doner set's cabinet isn't the finest either.
I used to have a Zenith ChromaColor II w/ black matrix tube. While I personally thought it produced a better picture than this RCA, my mother says that she can see this TV better. |
Post# 983728 , Reply# 12   2/21/2018 at 16:13 (2,255 days old) by firedome (Binghamton NY & Lake Champlain VT)   |   | |
Checkrate/Likes
 
     
mentioned above, does have a good reputation. We have one in an MCM Danish cabinet "Hi-Fidelity" version here in central NY that we're selling, with a good crt but otherwise unrestored, just too unfamiliar with these, they're unlike the stereos I'm used to working on!
View Full Size
|
Post# 983790 , Reply# 13   2/22/2018 at 01:08 (2,254 days old) by norgeway (mocksville n c )   |   | |
Checkrate/Likes
 
1    
When properly set up produces the most beautiful color, much softer and more lifelike than the harsh glaring sets today. |
Post# 983793 , Reply# 14   2/22/2018 at 02:03 (2,254 days old) by speedqueen (Metro-Detroit)   |   | |
Checkrate/Likes
 
     
With the 20 minutes that I ran my 25MC33 before a filter cap went intermittent and sent the color at the sides of the screen haywire and dragged down the HV, it produced the best color picture I have ever seen. It handily beat out this RCA and my old ChromaColor II as well as any modern set I have seen. I will however admit that the resolution of modern sets beats this simply due to the limitation of the NTSC system. LED color can never approach CRT phosphors.
|
Post# 983848 , Reply# 15   2/22/2018 at 12:58 (2,254 days old) by firedome (Binghamton NY & Lake Champlain VT)   |   | |
Checkrate/Likes
 
     
to me is like tube audio, nothing like it!
I'd love to restore ours, but at my skill level and age not sure when it'd get done. The TV collectors all seem to agree the hand-wired Zeniths of this vintage are the best of the best in picture, easy of repair, and reliability. For sure the current high-tech sets are comparatively hard to watch in comparison, at least imo. |