![]() |
Ge 802
Dug this chassis out last night, it has been totally recapped, some resistors replaced. It has a raster, but no picture. I used a B&K television analyst and injected video at the v14 video amp tube. I got no test pattern but I did get some kind of signal thru, because the rastor changed state. Any suggestions where to look next?? This is one set I'd really like to get finished.
|
Quote:
|
Good luck with the 802. I'd love to see a photo when you get a picture. I'm really fond of the the look of the sister set to yours, the 801.
|
Quote:
|
The video is cathode modulated--through a .1 mfd cap. Cathode is pin 11.
|
Quote:
|
When I worked on my 802, I had the same issues-I think a mica cap went bad inside that awful tuner, and killed signal input. Anyway, injecting video in the same manner you did, I only got horizontal lines. Injecting video at the video amp really messes up the horizontal frequency. Adjust the coarse horizontal control (You'll need a plastic diddle stick for this, I ground down a chopstick to fit, as a screwdriver throws off the frequency more) until a picture pulls in. Hope that helps!
|
Quote:
Funny I usually play a trf radio when I'm down there working and usually get all kinds of squeeling noises out of the radio when I mess with the tv chassis. I'll make up a non-metal screwdriver tonight and see what that brings. |
Quote:
|
You won't have any contrast control. On this set, the contrast control raises and lowers the plate voltages on the tubes in the IF string. Since you've bypassed all that, twisting the contrast control will have no effect.
Try to inject a signal from a DVD player next. My BK 1077 produced odd results like that on my 802 project, while the video from my DVD worked fine. |
Quote:
|
Quote:
Not much left in there for stock components. All the mica's and a few resistors are still original. Getting something thru the tuner Rf-wise but not like it should be. |
making progress
Making some progress
|
Quote:
|
Quote:
I have to go thru the IF stages next. |
| All times are GMT -5. The time now is 03:21 AM. |
Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2026, Jelsoft Enterprises Ltd.
©Copyright 2012 VideoKarma.org, All rights reserved.