#16
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Before that, the real cheapie line was badged "Meteor". That name probably went back to the 30's. |
#17
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What was the deal with Sanyo and buying companies back then? I believe Sanyo bought Fisher around the same time, and then bought Marantz later. I have worked on Marantz gear that was built the exact same as later Sanyo era fisher stuff. It's been a few years though.
I tested the tube today in this Sears set after finding a #23 adapter. The CRT tests very good and I made sure to test it following the manual, then found a video online to follow just in case there was a mistake. Now it seems time for the LUM section to get resoldered and checked. It really is nice to know the CRT is good rather than just dig into a tv that could be a lost cause. Also the way this set is built is super cool. The two board chassis design is something I haven't seen yet. Most sets here either have one single board, or they're a Zenith set with boards all over the place. |
#18
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Resoldering did nothing, so I will have to pull the board.
When the set is powered on, there is an extremely bright blue and green dot on the screen. What is this? |
#19
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Before you go further make 2 DC measurements.
1) measure the collector of one of the 3 video outputs on the CRT socket. 2) the G-2 ( screen ) voltage at the CRT socket. This narrows things down. The colored blobs are normally seen at turn off & is usually normal. BTW try the G-2 control on the FBT. Just turn it up a tad. 73 Zeno LFOD ! |
#20
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What is the collector and where do I find it? I'm also not sure how to measure the G2 voltage. I know of the G2 controls but not where to check the voltages. Which G2 control and what is the "FBT"? Sorry about the stupid questions. |
Audiokarma |
#21
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FBT is flyback transformer! Can't help you with the rest though...
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#22
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Look at CRT socket. The 3 color outputs have white paint on
the PCB. They are marked E B & C measure the C in DC volts. The G-2 should be marked too. Use a meter rated at 800-1000 volts as it can be adjusted that high. Normal voltage is apx 400-500. Almost all in line tubes will have the same set up & its common to make tests here. 73 Zeno LFOD ! |
#23
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If your meter does not go beyond 600V you can get more range by finding a 200-400V B+ rail. Measure the B+ rail with respect to ground, then measure the G2 with respect to the B+ rail then add the two measurements to get the real G2 voltage.
__________________
Tom C. Zenith: The quality stays in EVEN after the name falls off! What I want. --> http://www.videokarma.org/showpost.p...62&postcount=4 |
#24
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The three color controls had no markings for what was what, and the only things with the E C & B markings are transistors on the neck board. I tested the voltages on the controls and got nothing on DC, then figured I misread something and tried AC. Still no voltage. I grabbed another meter and still got nothing. So the issue is the neck board? Have to admit it, but the high voltages can be a bit scary sometimes. |
#25
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Measure at the C of one of the transistors. Not the
controls. |
Audiokarma |
#26
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My bad. I should have realized that.
The voltages I got were 121, 123, and 127 volts DC. |
#27
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They are normal.
Try turning the G-2 control up a little. Also check the CRT socket for cold joints. 73 Zeno LFOD ! |
#28
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Silvertone was indeed bought by Sanyo, as it was part of the Warwick Electronics purchase by Sanyo. The Arkansas Plant became the Sanyo TV plant, and under Sanyo ownership went from bottom of the barrel, to one of the most reliable TV plants in the industry, by cleaning up the plant, and by vastly improved quality control practices and better management. Last edited by KentTeffeteller; 08-21-2018 at 02:14 PM. |
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