Sony KP-46V15 Convergence Fuse Grief & Drama

[Jeff]

Sony KP-46V15, has had intermittent blue haze overcome the screen
periodically - comes & goes - maybe part of my problem; otherwise
perfect picture – no shape, color or visible distortions of any
sort…..anyhoo stopped working.

Power up LED flash flash flash power down
Fuse F1602 gone
Replaced STK's (replaced STK392-010 with 020s)
Replaced Fuses
Re-soldered numerous heated connections
Re & re'd it – turned it on – (no signal connected) Yup. Got nice B &
W snow screen & beautiful pink noise. I'm a REPAIR GURU – woah now
that was WAY too easy & went WAY too smooth.

Put ‘er all back together, wheeled ‘er into her old spot, fired her
up……..
Power up LED flash flash flash power down
Fuse F1602 gone. Bummed right out.

What up?

Can a bad Blue CRT cause this?
Something else on the convergence board?

I'm now watching the Olympics on a hand held two inch Turbo Grafx
Express screen.

Anyone? Anyone?? Beuller? Beuller????

Tenks

 

[Leonard Caillouet]

I did have on of these with an intermittent short in the red tube arcing to
the sub DY blowing the fuse and the output IC. When it finally cracked the
glass on the tube I found the problem, but it was a PITA.

Replaced the tube with one from a junker and the set worked OK.

You could also have a DOA output. Where did you buy it?

Leonard

 

[Jeff Rigby]

Sony KP-46V15, has had intermittent blue haze overcome the screen
periodically - comes & goes - maybe part of my problem; otherwise
perfect picture - no shape, color or visible distortions of any
sort...anyhoo stopped working.

Power up LED flash flash flash power down
Fuse F1602 gone
Replaced STK's (replaced STK392-010 with 020s)
Replaced Fuses
Re-soldered numerous heated connections
Re & re'd it - turned it on - (no signal connected) Yup. Got nice B &
W snow screen & beautiful pink noise. I'm a REPAIR GURU - woah now
that was WAY too easy & went WAY too smooth.

Put 'er all back together, wheeled 'er into her old spot, fired her
up....
Power up LED flash flash flash power down
Fuse F1602 gone. Bummed right out.

What up?

Can a bad Blue CRT cause this?
Something else on the convergence board?

Don't know much about Sonys but a dropout of one of the power supply
voltages can cause the other volt line to blow a fuse. The STK's are
generally powered by - and + 30 volts as well as sometimes + and - 16 volts.
If you remove the convergence field coil plugs and measure the voltages
WHEN IT'S ACTING UP you can find which line is causing the problem.

 

[Jerry G.]

I have seen an intermittent shorting in the CRT cause your exact symptom
with this set.

--

Jerry G.
==========================


Sony KP-46V15, has had intermittent blue haze overcome the screen
periodically - comes & goes - maybe part of my problem; otherwise
perfect picture - no shape, color or visible distortions of any
sort...anyhoo stopped working.

Power up LED flash flash flash power down
Fuse F1602 gone
Replaced STK's (replaced STK392-010 with 020s)
Replaced Fuses
Re-soldered numerous heated connections
Re & re'd it - turned it on - (no signal connected) Yup. Got nice B &
W snow screen & beautiful pink noise. I'm a REPAIR GURU - woah now
that was WAY too easy & went WAY too smooth.

Put 'er all back together, wheeled 'er into her old spot, fired her
up....
Power up LED flash flash flash power down
Fuse F1602 gone. Bummed right out.

What up?

Can a bad Blue CRT cause this?
Something else on the convergence board?

I'm now watching the Olympics on a hand held two inch Turbo Grafx
Express screen.

Anyone? Anyone?? Beuller? Beuller????

Tenks