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> How did you do it?  I mean, connect your Amiga 1200 to your Sony
> KV25-XBR?  Nobody I've spoken with at any computer store or Sony dealer has
> any idea where to get a cable to connect a computer to the 34-pin RGB port
> on my Sony.  I even called Sony customer service, and those folks are real
> polite but even THEY don't have a clue.

I went to a Sony Service Center back in 1985 and purchased the full manual
for my TV, one that had schematics.  (I've misplaced it, so I can't tell
you the part number.)  There was a Sony "computer cable" for RGB connector,
but it listed for more than $30, and there was no guarentee that it had
the connectors I needed.  So I built my own.

I purchased a standard 34-pin connector with flat ribbon cable from a
computer store, and wired up a box that has an Amiga-compatible 9-pin video
connector, 6 RCA phono jacks (red green blue sync left right), and 2
switches.  One switch selects sync-on-green versus separate sync, the other
enables TV audio while in RGB mode.

9-pin Video connector (used by A2002 and A1084 monitors, AmiGen genlock):
  01 = Sync ground	06 = no connection
  02 = RGB ground	07 = combined Sync
  03 = Red		08 = no connection
  04 = Green		09 = no connection
  05 = Blue
	07+01 go to a black RCA jack labeled "Sync"
	03+02 go to a red   RCA jack labeled "Red"
	04+02 go to a green RCA jack labeled "Green"
	05+02 go to a blue  RCA jack labeled "Blue"
On a 23-pin Video connector, 03=Red, 04=Green, 05=Blue, 10=Csync, and 16-20
are all ground.  Do not use 11=Hsync or 12=Vsync in this case.  (On the
9-pin male to 9-pin female cable I was using, I took some wire cutters to
pins 06, 08 and 09, since their signals confused my A2002 monitor.)

34-pin RGB connector:
  01 = +5V		18 = no connection
  02 = +5V		19 = no connection
  03 = ground		20 = Audio, Right
  04 = ground		21 = Mode Switch  (I think this enables pin 23)
  05 = Remote Ctl gnd	22 = no connection
  06 = Composite gnd	23 = Video (composite)
  07 = Audio ground	24 = Audio, Left
  08 = Red ground	25 = Red
  09 = Green ground	26 = Green
  10 = Blue ground	27 = Blue
  11 = Ground		28 = no connection
  12 = Blank ground	29 = Blanking
  13 = Hsync ground	30 = H-sync
  14 = no connection	31 = V-sync
  15 = Vsync ground	32 = no connection
  16 = Ground		33 = RGB/N  (I think this forces RGB mode)
  17 = no connection	34 = Audio Select (+5v enables audio)

01+34 go to a SPST switch (to enable audio while in RGB mode)
20+03 go to a red RCA jack labeled "Right"
24+07 go to a white RCA jack labeled "Left"
25+08, 26+09, 27+10 go to the Red, Green, Blue jacks (and Amiga connector)
13 goes to the Sync jack ground, 30 goes to a SPDT switch, which connects
it to either the Sync jack (normal) or the Green jack (sync-on-green)

The phono jacks are useable by a "GIGI" (DEC VK100 terminal with BASIC).
The 9-pin connector is useable by an Amiga 23-pin to 9-pin cable, or
by the 9-pin output of an AmiGen genlock.

See also the "Sci.Electronics.Repair FAQ on Pinouts"
for "Sony RGB Multi Input (found on KV-25XBR TV's).

Joe Smith  <> or <>  work phone: (408)533-6220
CA license plate: "POPJ P,"  36-bits forever! (2 Tymshare PDP-10s still going!)
Humorous disclaimer: "My Amiga 3000 speaks for me."

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