9600 Service Manual - gmecorp-usa.com

12 Workstation Control
Auxiliary
Interface
PCB
Connector
Signal(s)
P14 Connects to P3 on AT Communications PCB, for VCR
controls, Serial Communications, other discrete signals
P15 VCR control signals, connects to internal VCR
P16 VCR control signals, connects to Rear Panel for external VCR
P17 COM 1 Communications Port on Rear Panel, from P13 (Aux
Interface PCB), from AT Communications PCB (P5)
P18 Parallel printer connection on Rear Panel, to P3 (Aux Interface
PCB), to AT Communications (P4)
P19 Video to/from Video Switching PCB for external VCR (VCR 2)
P20 Video from external VCR (VCR 2) to Video Switching PCB via
P19 (Aux Interface PCB)
P21 Video to external VCR (VCR 2) from Video Switching PCB via
P19 (Aux Interface PCB)
Table 1 - Auxiliary Interface PCB Connectors
K1 - K4 ROOM INTERFACE RELAYS
Relays K1-K4 are provided to interface an “X-ray On Light” and “Room In Use Light.”
Call the OEC Tech Support office for more information.
X-RAY ON LED ARRAY DRIVER
The LED array on top of the Workstation illuminates when X-rays are being produced.
The signal “X-RAY LAMP” (active Low) from the Power/Motor Relay PCB on the C-
Arm is interfaced to the Aux Interface PCB via the interconnect cable. “X-RAY LAMP”
enters inverter U1 pin 3 on the Aux Interface PCB. The output at pin 4 (active HI) turns
on Q1, which provides a return path for the LED array current. The power for the array is
+5V, jumpered through E3 pins 2 and 3.
WARNING... Damage to the LED array will occur if E3 pins 1 to 2 are jumpered together.
BOOT AND DIAGNOSTIC LEDS
LED displays U3 (MSB) and U4 (LSB) provide boot and diagnostic codes from the 386
AT Motherboard on the Workstation. They are driven from the AT Motherboard via the
AT Communications PCB. Refer to the Workstation Software section for a listing of
these codes.