GE Medical Systems PRODIGY Service Manual page 67

1 = Test Point Board, 2 = Detector Daughter Boards (4), 3 = Patient Positioning laser and
Detector Mother Board Interface, The Detector Mother Board is the horizontal circuit board
This document contains confidential or proprietary information of GE-Lunar Corp. Neither the document nor the information therein is
to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.
PRODIGY Service Manual (Rev C - 2000)
If the Flash RAM is corrupt, the DMB will read from the Firmware on the SBC.
The Flash RAM can be reprogrammed from the Host / SBC.
The DMB has a processor, which is responsible for performing the Peak
calculation during a Secondary Calibration (QA), programming the 4 DDB
PLD's and handles all communications with the SBC. The DMB processor
sends the SBC status reports and echoes back all commands that are sent to
it.
The DMB will reset the SBC if it detects an error.
Error Conditions of the DMB sensed by the SBC:
• PLD programming failure
• Loss of +5 or +12 VDC
• Loss of Communications with SBC
• Corrupt FIRMWARE
• FLASH RAM Failure
• DTR Reset button on the DMB is pressed
Figure 2-17. PRODIGY Detector Module
that the DMB's and Test Point Board are plugged into.
System Overview 2-73