WG 9200 no neck glow

BobsterD

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I am trying to bring back to life a WG9200... after some caps and repairing many cold/broken points on the neckboard the unit "sounds" like it's ok (no clicking, etc), yet I have no neck glow. Anyone have a idea on where to look for this problem?
 
Im a total amateur at best , but no yolk glow means no power .check the power to the chassis board , mine have a 2 pin 100v in plug , make sure that plug is on the right way , check the fuse on the chassis board .thats as far as i can go . someone else will know tonnes more .
 
Thanks for the reply. I have power, I can hear the chassis power up. I'm thinking the fly is bad.
 
D9200s are SUPPOSED to click a bunch of times as they power up. It's just a quirk of the chassis. What are you hearing when you apply power?

Verify you don't have heater voltage (Check pins, eh, 2 I think? might be 4, on connector P203 on the neckboard, against pin 3 (ground). Should be 8V, AC IIRC. The opposite pin has your B+, 170VDC). If you have heater voltage but not neck glow, your tube is shot, and probably beyond rejuvenating.
 
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I'll try your test points. That should give me a good starting point - thanks! What I hear sounds like every other chassis that fires up, it sounds as if it should be working, no "funky" noises.. I'm hoping the tube isn't bad.
 
Well, hooked up my rejuv and the tube is fine... neck glow and all. So, I still have a problem with this chassis. I'm leaning to a HOT/Flyback.
 
Have you reflowed the solder joints on the Flyback? These monitors have terrible soldering from the factory.
 
Well the latest... recapped the who board (yikes) and installed a new fly, same results.
 
Sounds like you have no or low secondary voltages from the powersupply..
Check the cathode side or band side of diode of D810,D811,D813
D814 etc using the ground on the big heatsink on chassis.
See schematic for normal voltages..try replacing C828 and c838 for 5v line.
Or if no voltages replace the caps in the primary side of powersupply..
like c810,C814,C844,C813 etc. Good Luck!
 
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