Color drives/biasing on '77-'80 Zeniths & '74-'75 Sonys...

[fxcamera1]

Originally Posted by Dave A

Then look at the hidden drive control which pulls all guns up or down in relation to the customer brightness/contrast controls.

What would this also be known as? The AGC? The ACC?

Would you say that I should pull them up or down according to consumer preferences? Or where I think the brightness/contrast should be according to where those front controls are at the moment I am performing this?

[zeno]

Originally Posted by fxcamera1

What would this also be known as? The AGC? The ACC?

Would you say that I should pull them up or down according to consumer preferences? Or where I think the brightness/contrast should be according to where those front controls are at the moment I am performing this?

ACC is Automatic Color Control dont touch
AGC is Automatic Gain control also dont touch

Overall brightness on Zenith is affected by:
G-2 or Screen
ABL
Brite range
BL
Depends on chassis what its uses.
No need to touch them unless the pix is to brite or dark &
then it is questionable.....

Customer contrast or picture control & bright should be mid range.
Driving it at high levels exaggerate any flaws in the CRT making
it look bad.
If you take a set with a very weak CRT & adjust it in a dark room
at low level it usually will look good till you turn things up. A
slightly weak CRT can look almost good in normal light.

BTW If you post a chassis picture ( nudie ) model & chassis numbers
it helps ID the set. Dont know if you have a CC2 style steel chassis
or a System 3 style. All I know is its an in line EFL CRT.

73 Zeno
LFOD !