9600 Service Manual - gmecorp-usa.com

C-Arm Control 23
ANALOG INTERFACE PCB
All S/N - Assy. #00-876738 - Sch. 876740
OVERVIEW
The Analog Interface PCB is the link between the Technique Processor PCB
(primarily a digital board) and the rest of the generator assembly (primarily
analog functions). The Technique Processor PCB and Analog Interface PCB
plug into the Motherboard which serves as the backplane of the card rack (see
Figures 1, 9, and 10). They communicate via a PC bus and the A/D Data bus on
the Motherboard.
Analog Interface PCB circuitry can be divided into the following sections:
A/D Section - Samples and digitizes signals from the X-ray Regulator PCB to be
read by the Technique Processor PCB.
D/A Section - Converts data bytes from the Technique Processor into analog
signals for such functions as camera gain, kVp control, mA control, and filament
control.
CTC Section - Generates the high voltage drive and filament drive signals.
PIO Section - Provides a digital interface between the Technique Processor and
discrete digital signals.
Interlock Section - Interfaces the processor's interlock keep-alive signal with the
relay controlled interlock circuits.
X-ray Switch Logic - Interfaces X-ray switch closure information from the control
panel, footswitch, and handswitch.
Stator Sense - Circuitry to sense current flow to the stator windings.