TV Zenith Solid-state 70's

[Dreamsbeard]

Originally Posted by zeno

Alignment is simple. Just change the IF module, its
all in there. Only has a 3.58 trap in the video off board.
Also has a CTA ( cross talk adjust) pot where the color gets
stripped off the composite.
Interesting thing is the 3.58 trap is where the bright,
sharp & contrast are also the H&V blanking.
Remember that blob ?????????

73 Zeno

So, the IF module could be aligned, but it would also be possible to simply change it. What I could do, if anyone has a spare IF module, is that I could replace mine, and then ship the faulty module to anyone that would be interested to restore it. I took a picture of the chassis with what I think is the IF module. Could I remove the module without having to pull the chassis?

As I was chatting with Jon.A , he suggested that the dent that I have in the CRT face glass could compromise the integrity of the tube. What do you guys think? Do you think it might be dangerous to operate the TV?

Thanks!

[Findm-Keepm]

There are screws and plug-in wires on the bottom of the chassis that have to be removed. PTS, Zenith and others rebuilt the IF modules for the duramodule sets. Finding them should be fairly easy - they were often replaced, although not bad, when any video gripe came about. Yes, 90% of the time, the IF module was good, and the B+ cap, a connection, or an IF injection lead from the tuner was at fault.

150- prefix for the IF module, IIRC. I don't have my CRSP handy to tell you the replacement matrix - i.e. which 150- ### IF module replaces what....

Cheers,

[Dreamsbeard]

Originally Posted by Findm-Keepm

There are screws and plug-in wires on the bottom of the chassis that have to be removed. PTS, Zenith and others rebuilt the IF modules for the duramodule sets. Finding them should be fairly easy - they were often replaced, although not bad, when any video gripe came about. Yes, 90% of the time, the IF module was good, and the B+ cap, a connection, or an IF injection lead from the tuner was at fault.

150- prefix for the IF module, IIRC. I don't have my CRSP handy to tell you the replacement matrix - i.e. which 150- ### IF module replaces what....

Cheers,

Oh I see, would you recommand that I check some simple connections or components before going full replacement of the IF module?

[andy]

...

[Marco-nix]

Originally Posted by Dreamsbeard

As I was chatting with Jon.A , he suggested that the dent that I have in the CRT face glass could compromise the integrity of the tube. What do you guys think? Do you think it might be dangerous to operate the TV?

Thanks!

Oops! .. I had not seen this little spot (dent) on the picture tube .. but I already saw this kind of spot on many old televisions and this has never bothered TV operation ..