Zenith color console 14B9C50

[pac.attack76]

Just got this one the other day from a friend. Turns on with sound and backlit channel selector but no video. What year would this one be? I figured somewhere between 68 and 72. If more pics are needed, lmk. Really want to see this one working.

[Electronic M]

B is 1972. Does it have raster?

[pac.attack76]

Originally Posted by Electronic M

B is 1972. Does it have raster?

Ok, thanks. Nope, nothing. Just the heater.

[Electronic M]

Don't run it for more than a minute like that. Check grid voltage on the horizontal output. Should be around -75V. If not your horizontal oscillator isn't running.

[pac.attack76]

Originally Posted by Electronic M

Don't run it for more than a minute like that. Check grid voltage on the horizontal output. Should be around -75V. If not your horizontal oscillator isn't running.

Isn't that the 6U10 tube? Set needs to be on or just plugged in?

[zeno]

Clean set. Tubes I can see are OEM. White or yellow = OEM, red labeled are replacements.
Hoz out usually fused with a Bel-Fuse Those 2 green squares are examples
Hoz will be black & say 500-1. Center rear on top or under chassis IF it uses one.
Careful of that HO tube, VERY expensive !

Zeno

[pac.attack76]

Originally Posted by zeno

Clean set. Tubes I can see are OEM. White or yellow = OEM, red labeled are replacements.
Hoz out usually fused with a Bel-Fuse Those 2 green squares are examples
Hoz will be black & say 500-1. Center rear on top or under chassis IF it uses one.
Careful of that HO tube, VERY expensive !

Zeno

I don't recall seeing a fuse for that but I'll get in there tomorrow and look.

[Electronic M]

Zenith bel fuses are plastic rectangles.

[pac.attack76]

Originally Posted by Electronic M

Zenith bel fuses are plastic rectangles.

Yeah I seen the two green ones but didn't notice any others.

[pac.attack76]

I'm gonna get in there this evening and look to see if there is a fuse near the oscillator. Also I'll test for reading. Where should I put my leads? Just wanna make sure I get it right.

[zeno]

By convention use the steel chassis for ground ( - or black lead).
Newer sets may have several ground points. Voltage is measured
at the Hoz out tube G-1 (6LB6 ? ). If the voltage in NOT very
negative ( @ -70 to - 90 VDC ) it will eat the H out & in some cases
melt it ! So keep testing under 1 mn til you get a raster.
You can measure from the top, you just need to count the pins CCW.
Pin out is on any data sheet for the tube.

Zeno

[pac.attack76]

Originally Posted by zeno

By convention use the steel chassis for ground ( - or black lead).
Newer sets may have several ground points. Voltage is measured
at the Hoz out tube G-1 (6LB6 ? ). If the voltage in NOT very
negative ( @ -70 to - 90 VDC ) it will eat the H out & in some cases
melt it ! So keep testing under 1 mn til you get a raster.
You can measure from the top, you just need to count the pins CCW.
Pin out is on any data sheet for the tube.

Zeno

Ahh ok, number 5. I'll get in there tomorrow and see what I get. I'll check for that belfuse as well

[pac.attack76]

One pic shows a fuse nearby. I couldn't get a reading. Did I do it right?

[zeno]

Looks right. See if the fuse is open.It goes between the hoz out cathode & GND.
If blown you can just jump it out for a FAST check, < 1mn.
Things can get complex now so take it slow, one thing at a time. NO shotguns !

Zeno

[pac.attack76]

Originally Posted by zeno

Looks right. See if the fuse is open.It goes between the hoz out cathode & GND.
If blown you can just jump it out for a FAST check, < 1mn.
Things can get complex now so take it slow, one thing at a time. NO shotguns !

Zeno

If I did it right on meter, it showed open. I'll jump it for a few secs. If jumping it, what will it do? Work normally or?