Installation manual

DTS-6 Installation Manual Section 7: Diagrams
7-25
TECHNICAL UPDATE FOR DTS TO DOLBY CP-55 / WITH AUTOMATION
At the end of the show when the automation pulses the processor to non-sync it will occasionally switch
back to 04 optical causing the tail end of the film to be heard as it runs out of the projector. To prevent this
from occurring it will be necessary to replace the small board D-431.
READ INSTRUCTIONS AND SEE ILLUSTRATION BEFORE MAKING ANY MODIFICATIONS
The d-431 board is connected between the BS-22 ribbon cable and the CP-55. NOTE: on some 50-pin
cables the BS-22 ribbon cable is soldered directly to the D-431 card. If this is the case you will need to cut
the ribbon cable removing D-431 and then install the enclosed 10-pin strip IDC socket which will plug into
the new D-490 card.
The new D-490 card has an additional feature, if your CP-55 is equipped with an SR unit it can be wired in
such a way that you may select SR or A-type format back-up. This can be done by moving the jumper
located on the new D-490 card J2 across pins 2 & 3 for A-type or across pins 1 & 2 for SR.
An optional remote switch can be installed and labeled on front on the rack for more ease of setup and
eliminate the need of moving the jumper.
IF YOU HAVE ANY QUESTIONS PLEASE CALL DTSFOR ASSISTANCE. 818-706-3525