9600 Service Manual - gmecorp-usa.com

38 C-Arm Control
COMMUNICATION BETWEEN C-ARM AND WORKSTATION
Communication between the C-Arm and Workstation is established during the
boot process. All of the arrows will be displayed on the Control Panel Display as
shown below during this part of the boot process.
During normal operation, the Technique Processor and 386 AT Motherboard
send information such as:
• Shot log file information from the C-Arm to the Workstation
• Commands such as L>R, SAVE and CART MODE from the Control Panel
to the Workstation
• “Enable Boost” command to the C-Arm when CHOLE/DIGITAL SPOT is
selected on the Workstation
The TXD and RTS signals from Port B of the serial communications controller
U39 on the Technique Processor PCB are sent to the 386 AT Motherboard on
the Workstation. They pass through RS232 driver/receiver U52 on the
Technique Processor PCB and then pass through the Mainframe Motherboard,
the interconnect cable, and enter the Aux Interface PCB in the Workstation.
They pass through the Aux Interface PCB to the AT Communications PCB
where they are inverted by U15 and enter DUART U27. U27 interfaces the
signals to the data bus of the AT Motherboard.
The 386 AT Motherboard communicates over the data bus to DUART U27 on the
AT Communications PCB. TXDA (pin 30) and RTS (pin 29) leave DUART U27,
pass through RS232 line driver U16 and leave the AT Communications PCB at
P3. They then pass through the Aux Interface PCB, the Interconnect Cable and
enter the C-Arm at J1 on the Power Panel. They pass through the Mainframe
Motherboard and enter the Technique Processor PCB at P2.
On the older Technique Processor PCB (Assy. #876735) the signals then pass
through RS-232 driver/receiver U52 and are received by serial communications
controller U39 at pins 8 (RXD) and 23 (CTS).
On the newer Technique Processor PCB (Assy. #877744) the signals then pass
through RS232 driver/receiver U52 and COM SELECT GAL U38 and are
received by serial communications controller U39 at pins 8 (RXD) and 23 (CTS).