Newsgroups: sci.electronics
Subject: SNES->SCART
From: Andrew_Barker@kcbbs.gen.nz (Andrew Barker)
Date: 14 Aug 92 21:27:24 GMT
Organization: Kappa Crucis Unix BBS, Auckland, New Zealand

I need some help.  I don't know much about electronics and I want to
to connect a Super Nintendo Entertainment System to a Sony TV with a 
SCART connector on the back.  I live in New Zealand so it is a PAL TV, 
but it also supports NTSC input (ie you can push a button and it will 
switch to a NTSC mode).  I would like the best picture possible so a 
RGB connection would be best, and I believe the TV will be able to 
handle the sync? Can anyone tell me for sure?
 
Failing that I guess the next best would be a Super VHS connection.
So can someone please email me telling me how I can connect between
these two connectors for RGB and Super VHS output. An article appeared 
in the April Radio-Electronics magazine but they didn't discuss SCART
connectors.
 
I would also like to be able to input stereo sound into the TV, but 
to do that you need a matrix invertor, whatever that is? 
 
Supposedly Redmond cable have all the connectors and cable, but I 
don't know whether they would sell any which have SCART connectors on
them. Can someone find out for me?  Can someone give me their address,
phone number and fax number.
 
The pins on the connectors of the TV and the SNES are as follows :
 
 
TV Scart connector 
------------------
 
Pin No     Signal             Signal Level
----------------------------------------------------------------------
  1        Audio output       Standard level : 0.5 Vrms
           B (right)          Output impedance : Less than 1 k ohm
 
  2        Audio input        Standard level : 0.5 Vrms
           B (right)          Input impedance : More than 10 k ohms
 
  3        Audio output       Standard level : 0.5 Vrms
           A (left)           Output impedance : Less than 1 k ohm
 
  4        Ground (audio)
 
  5        Ground (blue)
 
  6        Audio input        Standard level : 0.5 Vrms
           A (left)           Input impedance : More than 10 k ohms
 
  7        Blue input         0.7 V +-2dB, 75 ohms, positive
 
  8        Function           High state (9.5 - 12 V) : Part mode
           select             Low state (0 - 2 V) : TV mode
           (AV control)       Input impedance : More than 10 k ohms
                              Input capacitance : Less than 2 nF
 
  9        Ground (green)
 
  10       Open
 
  11       Green/Green        Green signal : 0.7 V +-2dB, 
           with sync           75 ohms, positive
           input              Green with sync signal : 1 V +-2 dB,
                               75 ohms, positive
 
  12       Open
 
  13       Ground (red)
 
  14       Ground (blanking)
 
  15       Red Input          (Same as Pin 7)
 
  16       Blanking           High state (1 - 3 V)
           input              Low state (0 - 0.4 V)
           (Ys signal)        Input impedance : 75 ohms
 
  17       Ground (video output)
 
  18       Ground (video input)
 
  19       Video output       1 V +-2 dB, 75 ohms, positive
                              Sync : 0.3 V (-3, +-10 dB)
 
  20       Video input        1 V +-2 dB, 75 ohms, positive
                              Sync : 0.3 V (-3, +-10 dB)
 
 
Super Nintendo Entertainment System Connector
---------------------------------------------
 
Pin No
--------------------------------------------------------------------------
   1       Red Video          For linear RGB monitor use.
                              One volt peak-to-peak off of an emitter
                              follower source.
                              Requires a series 200 ufd coupling capacitor.
 
   2       Green Video        (same as pin 1)
 
   3       /RGB Sync          For linear RGB monitor use.
                              Active low combined vertical an horizontal
                              sync pulses.
                              0 - 5 volt high logic source is CMOS and 
                              TTL compatible.
 
   4       Blue Video         (same as pin 1)
 
   5       Ground             Provided to ease teminating of shielded
                              video and audio cables.
 
   6       Ground             (same as pin 5)
 
   7       Super VHS "Y"      The luminance channel for Super VHS video.
                              One volt peak-to-peak into a 75 ohm load.
                              Internally capacitor coupled.
 
   8       Super VHS "C"      The chroma channel for Super VHS video.
                              One volt peak-to-peak into a 75 ohm load.
                              Internally capacitor coupled.
 
   9       NTSC Video         NTSC composite video.  The sync tips are at
                              ground.
                              One volt peak-to-peak into a 75 ohm load.
                              Internally capacitor coupled.
 
   10      +5 Volts DC        A limited amount of +5 Volts supply power 
                              may be drawn out of this pin for sync 
                              inverters or doing a stereo dematrixing.
 
   11      L+R Sound          The monophonic and stereo matrixed sound
                              appears on this pin.
                              One volt peak is suitable for amplifiers 
                              but not headphones.
 
   12      L-R Sound          The stereo matrixed difference signal appears
                              on this pin.
                              Add pins 11 and 12 for left stereo: subtract
                              them for right stereo output signals.