AGFA ADC 5155 X-ray Scanner Teardown (4 part series) - Page 1
Forum section: electronics / projects

author: madsbarnkob
author_rank: Frequent Contributor
timestamp: November 18, 2020, 08:10:49 pm
content: Part 1: AGFA ADC 5155 System teardownTeardown of a AGFA ADC 5155 x-ray image scanner / digitizer. Also known as Computerized Radiography (CR) it fulfills the job of scanning a x-ray exposed image plate with a laser beam and extract each pixel illumination with aphoto multiplier tube setup.This particular unit has a very interesting computer that runs onVME framework developed for the Motorola 68000series CPUs.Coming soon, part 2: Computer teardown and reverse engineeringComing soon, part 3: Laser scanner module teardownComing soon, part 4: Photomultiplier tube teardown and reverse engineering

author: madsbarnkob
author_rank: Frequent Contributor
timestamp: November 26, 2020, 11:26:25 am
content: This is the reverse engineering and teardown of a very interesting computer that runs on VME framework developed for the Motorola 68000 series CPUs. It runs a custom operating system called Monitor 4.28 developed by Agfa-Gevaert NV, Belgium.Discussion of the teardown:https://highvoltageforum.net/index.php?topic=1316.0Teardown of a AGFA ADC 5155 x-ray image scanner / digitizer. Also known as Computerized Radiography (CR) it fulfills the job of scanning a x-ray exposed image plate with a laser beam and extract each pixel illumination with a photo multiplier tube setup.List of commands:ATX = Execute ASTRX shell commandBF = Block fillBI = Block initializeBM = Block moveBS = Block searchBT = Block testBR = Breakpoints (BR -* clear)BRS = Set Breakpoints cmd stringBO = Boot from diskCPU = Set CPU parametersCWS = Show Clock and Wait statesDA = Display or set DATEDCP = Disk copy from 10 to 00DI = DisassemblerDOS = Enter DOS modeDU = Dump sector from diskGO = Go targetGN = Go target, break at next instrGT = Go target, set temporary breakHE = Helpfep = Show FEP infoIOP = IO disk read and writeIOT = IO teachJSR = Jub to subroutineLO = Load S-recordsLOG = Show OS RAM loggingMAP = Select memory mapMD = Memory displayML = Memory display link (range) == address1,address2 or address:countMM = Memory modifyMS = Memory setNAM = Show symbolic namePF = Set Port formatPRJ = Select projectRAM = RAM testRD = Register displayRDF = Display floating point regsRDM = Display MMU regsRES = ResetSC = Set Control optionsST = Start clock-swi = Switch CPUT = Trace next (step into JSR)TR = Trace next (skip over JSR)TC = Trace on change of flowTM = Transparent modeTI = Display & Set clock timeTE = Switch to TEST menuUS = Start user programVE = Verify S-recordsVEC = Show vectorsVIC = Show VIC & hardwareVME = VME remote controlVIX = Boot from diskX = Execute external shell commandXT = File transfer protocol

author: madsbarnkob
author_rank: Frequent Contributor
timestamp: December 04, 2020, 05:56:48 pm
content: Teardown of the laser scanning module that feeds in the image plate and converts the irradiated plate from analog pixel values to digital bits through a photomultiplier tube.

author: madsbarnkob
author_rank: Frequent Contributor
timestamp: December 10, 2020, 07:47:00 pm
content: Teardown of the photomultiplier tube assembly (PMT) and its high voltage power supply. The high voltage power supply and PMT is reverse-engineering to use the PMT as a cosmic ray detector with a scintillation plastic crystal in front of the PMT.The PMT assembly contains a Burle S83021E photomultiplier tubeThe Heim Electronic SNP1.5N24/176 high voltage power supply is a custom made AGFA unit that can output a maximum of -1.5kV / 6mA. It is a very nice little power supply that only takes 24VDC supply, can be controlled by 0-10V and gives a feedback at 0-10V.The low output voltage makes a huge difference on the sensitivity of the PMT, at its -600V it is 20 times less sensitive than if it was running at -1100V.Some examples of the detected particles resulting pulse on the oscilloscope