Sony CCU-TX7 Service Manual page 37

DU-33 board AU-234 board
[For the Serial No. 10601 and Higher (UC)]
[For the Serial No. 40251 and Higher (CE)]
DU-33 Board (A SIDE)
¢ S1 (WIDE ID ON/OFF)
Set this switch to ON position when the 16:9 compatible
camera is connected and used in the 16:9 mode.
Factory setting : ON
AU-234 Board (A SIDE)
* $5 (DYNAMIC/CARBON)
Set this switch according to the type of the headset
microphone connected to the INTERCOM connector on
the front panel.
DYNAMIC _ : Dynamic type microphone
CARBON : Carbon type microphone
Factory setting : DYNAMIC