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Old 04-14-2018, 08:41 PM
RetroHacker RetroHacker is offline
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Join Date: Jan 2005
Location: Niskayuna, NY
Posts: 449
Sony KV9000U HV multiplier

Working on a Sony KV9000U that arcs occasionally. Appears to be a crack in the HV multiplier block attached to the flyback. Sony part number 1-202-713-11. Anyone have a cross reference, a source, or any sort of information on this part? The set works great, aside from the arcing.

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Old 04-16-2018, 07:45 AM
zeno zeno is offline
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Join Date: Mar 2013
Location: New Hampshire
Posts: 2,965
You will probably need a donor set. A few warnings about it.
1) Sams shows 3 manuals so be sure you got the right
one. If the part ## came off the part you are OK.
2) MOST Sonys had a coax anode lead. The shield was HV & the
center was the aperture grill. The shield hooked on like normal
but the center contacted a little coil spring. It had to be pulled
strait off or spring was lost or damaged.

Its been prob 30yrs since I worked on one but Sony did HV in several ways
in the olden days.
1) a regular HV rectifier tube
2) little wired in tubes & caps.
3) diodes & caps
4) sealed unit.
The HV attracts a lot of mung over the years so a good clean up often
helps. Pinholes & carbon usually can be drilled out & resealed.

73 Zeno
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