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Hitachi 51SWX20B green crt too bright issue

post #1 of 2
Thread Starter 
I am new to the forum and I did search for a while trying to locate a solution but unable to.I want to fix if practical but will just get and lcd/plasma if this is going to cost too much.TIA

My Hitachi 51SWX20B has developed a problem. The green crt is too bright and all I see is green. When tv first comes on, I see static but then in a few seconds, it all goes green.I look at lens and I see static in blue/red but green is so bright, I dont see anything but green.
Things I have done:
1) Put in new ICs and resistors (42,46,50,54,58 and 62)
2) Turn the green all the way counter clockwise on the focus pack-still very bright and if I turn it clockwise, it gets brighter and kills power 1/8th of a turn.
3) I have switched red and green flyback cables to see if voltage issue-no effect.
4) I have switched red and green crts and now red is to bright (green pcb connected to red tube)
5) I have switched the cables on the focus pack (red with green) and focus pack seems to work fine.
6) Examined green pcb and found 1 resistor (r865) to be burned out. I replaced with a 100 ohm resistor (checked with dmm-according to schematic)

I am stuck.Something is wrong with the green circuit somewhere.One thing I did notice is the schematic calls for different resistors than what I physically saw and measured on the convergence board but the tv did work so I consider a non issue. Any advice would be appreciated.
post #2 of 2
Thread Starter 
Update:

The green crt drive pcb board had an extra wire connected to it.I didn't notice until I removed all 3. The wire was connected just to the left of the tube connection.All 3 boards had this connection and got me thinking that maybe this wasn't supposed to be connected. I reviewed what documentation I have and came to the conclusion that that wire should only be connected in some calibration sequence.I reinstalled the 3 boards with that wire not connected to anything and now I am watching HDTV.That wire is connected to a "cold" connector on the power pcb.
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