Sony BVP-900 Series System Manual page 123

3-1 Internal Boards
9 Board power indicators (green)
All four indicators light when the power supplies to the
internal board are normal.
Note
Unless all four indicators are on, there is a fault.
Contact your Sony representative.
0 REFERENCE IN (reference signal input)
indicator
Lights when a reference signal is input.
!¡ REFERENCE OUT NORMAL/1H-ADV switch
By setting this switch to 1H-ADV, it is possible to
output a synchronizing signal advanced by one line.
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Chapter 3 Initial Settings