Quote:
Originally Posted by Alastair E
It Really IS an easy mod....
Choose a Horiz Drive Tx from any popular set that uses a conventional Transistor.
Remove the Original Sony Tx and replace.
Only issue--The Sony uses the 19V rail (In the case of the 1810) to supply the drive stage. You'll Maybe have to alter the drive transistor and or the supply to it--To match that of the donor transformer, so if the Donor set uses a full (say 120V +B) to the drive Tx, then you'll need to supply the modded stage with that voltage, and change the drive transistor.
The Base circuit for the Horiz Out should also match that of the donor set.
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Base to gate, Cathode to emitter, and Anode to Collector? Swap out driver transformer with one from a transistor set? Change the drive transistor to what? I've seen low and medium power horizontal drive transistors. Any problems with ringing or drive lines from the changed impedance of the output transistor?
Much more is needed - and I'm coming at this with over 30 years experience...
Sony used different gating methods in the SG608/SG613 sets, with some of the drive coming from another SCS, like the SG629. One size fits all isn't going to work in all sets - and the mod in the UK magazine was for the KV-1810UB, a set without a direct US analog, but probably close to the KV-1710, the FTC mandated 17" vs almost-18" screen.
Not a skeptic, just more detail is needed - not everyone here is overly familiar with the Sony circuit, much less one without a schematic....