Service manual

Appendix E - Monitor adaptor cables
This appendix describes how to make adaptor cables for
monitors not supplied with a 15-way VGA connector.
Adaptor type 1
The cable supplied with some Multiscan monitors is
terminated at the computer end with a 9-way D-type plug.
You need a standard 15-way plug to 9-way socket
adaptor:
Note: The ID[O] to OV connection will make the monitor
type 3 modes available and the computer will generate
separate sync signals.
Most Multiscan monitors are now being designed to be
VGA-compatible and will work satisfactorily when driven
with separate horizontal and vertical sync signals.
Adaptor type 2
The cable supplied with some Multiscan monitors
requiring composite sync is terminated at the computer
end with a 9 pin D-type plug. You need a 15-way plug to
9-way socket adaptor:
Note: The HSYNC to ID[2] connection will make the
monitor type 1 modes available and the computer will
generate a composite sync signal.
Adaptor type 3
The cable supplied with some TV-type monitors is
terminated at the computer end with a 9 pin D-type plug.
You need a 15-way plug to 9-way socket adaptor:
Note: The HSYNC to ID[0] connection will make the
monitor type 0 modes available and the computer will
generate a composite sync signal.
Cable type 4
You need to make this cable to use with televisions and
TV-type monitors using a SCART input socket:
The 220Ohm resistor results in a CSYNC signal of
approximately 1V peak on pin 20 of the SCART connector.
The 75Ohm resistor results in a blanking signal of
approximately 2.5V dc on pin 16 of the SCART connector.
Appendix E - Monitor adaptor cables issue 1, November 1991 E-1