#16
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#17
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So after resoldering the board conenctions, cleaning the crt pins, the cathodes took a bit of running at normal voltages to recover?
jr |
#18
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That's as good a explanation as any.
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#19
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I hope she is happy now and will give you excellent quality for along time |
#20
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Yeah, hope so too. When it was doin' the original 'cycling' act, there was no perceptible change in the heaters' normal healthy orange glow. A "Lazarus" CRT is real puzzler for sure.
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Audiokarma |
#21
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Newer sets do some strange crap. I had a few of this vintage Sony
with a small ( H & V ) & messed up raster. Who would suspect a bad tuner ? The data line to the tuner would short & none of the IC's such as the jungle would get the preset data from the E-prom. So you had to change the tuner / IF & it just cost too much. Odds are it was a chip in the tuner shorted but probably a SMD & not available. BTW to trouble shoot just unsolder the CLOCK, DATA & ENABLE pins at the tuner. If it gives a full raster its the tuner....... 73 Zeno |
#22
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Have to remember that one. Thanks.
__________________
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#23
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A question for Zeno
Zeno, you being the resident Sony guru, lemme pick your brain a bit. The jug in this Wega KV-20FV12 is starting to get a little soft again. Before I think about pulling the back again, is there a heater series resistor? I can't find a schematic anywhere showing the CRT area. Presumably the resistor would be on the CRT socket board.
I know some other brands had 'em. Having retired from the repair trade in 1986, I'm not overly knowlegable on newer stuff. |
#24
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Quote:
__________________
Brian USN RET (Avionics / Cal) CET- Consumer Repair and Avionics ('88) "Capacitor Cosmetologist since '79" When fuses go to work, they quit! |
#25
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Wow, thanks. May be able to milk the old jug a while longer now.
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Audiokarma |
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