Sub Address - Pioneer PDP-5030HD Product Training Manual

Sub Address Block
The two Sub Address Circuits are located just above and below the
address driver connect assembly's ( between B & C connectors ).
See the overall block Diagram for locations. The upper and lower
sub address circuits monitor the current draw of the 60 volt supply
to the address drivers. If a small amount of current draw is detected
(more than normal) a signal is sent back to the Digital Video
Assembly (ADRK EMG1) as an emergency signal and the Digital
Video Assembly will limit the number of address data pulses in
order to lower the current draw. If the current draw is too large the
address power down signal will be sent to the Digital Video
Assembly (ADRK PD) and the panel will go into power down
condition. (red flashing LED).
21.