Maker Pro
Maker Pro

Again with the CTC169...

R

Retro Depot

Jan 1, 1970
0
Hello again folks. Well, all suggestions made on the previous post were
tried and the end result is I'm back to square one! Just to remind you, this
36" RCA has what looks like distorted video, both RF and composite inputs
garner the same results. Image is shifted to the left approx. two inches,
color is intermittent, there are severe hue shifts intermittently, colors
sometimes bleed a little, sometimes when channel is changed vertical roll
momentarily, when bringing up menu in video mode, OSD is perfectly centered,
go figure. The jungle has been replaced so have countless other
components...aaaarrrggghhh. Please help.
Cheers, Steve
 
D

Dani

Jan 1, 1970
0
If you had a pix of the symptom, it would be a great help. Did the unit
arc...I mean the CRT? If the ground that plugs into the CRT board, it
can arc, & kill the jungle IC. Or, you
may have a bad Q2906 the luminance buffer shorted on the main board
toward the back of the chassis, (not sure of the location # ), look
for the three R,G,B video buffer
transistors in a row near the crt bias and drive controls and then look
for a single transistor near there that is the luminance buffer. Hope
this helps, Dani.


Look here: http://wa6ati.com/Ctc169.htm
 
R

Retro Depot

Jan 1, 1970
0
Thanks for the info Dani, and yes I do have a screen shot I can send you.
Video buffer usually has symptoms like bright raster w/retrace, no video.
The problem I have has got me beat. I'll keep you posted as to what has been
done later, for now I'll send the pictures.
Cheers, Steve
 
Top