Sony VPH-D50Q Manuel D'installation page 25

Setting the CN1006 (R), CN1005 (G) and CN1004 (B) 75-ohm terminate connectors
A board
75 Ω (pin position 3): This position is selected at the factory.
OPEN (pin position 1): Set to this position when the input signal is
distributed into other equipment using a branch connector and is
terminated at 75 ohms on that equipment.
Pin positions set at the factory
OPEN 1
NORM
2
75 3
CN1006
How to switch the connector
Note
The pin positions of the CN1001, CN1002 and CN1003 connectors are set at the
factory as illustrated. Do not change the settings.
CN1001 CN1004
3 2 1
HS HS SEP
1 OPEN
2 1k
75 3 75
OPEN
3 2 1 1 2 3
CN1005 CN1003
75 1k 75
1 2 3
CN1002
25
Connections (EN)