Service manual

MDS E-SCAN MPR E-SCAN OPERATION / PROBLEM ANAYLSIS
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3. MPR E-Scan Problem Analysis
3.1 Procedures
The following analysis procedures are meant to aid in isolating MPR E-Scan failures down to the
board, or in the case of the sensing head--device level. Board or device replacement with a fast
turnaround is available from EMC.
These abbreviations are used:
I/O Main E-Scan I/O board Conditions analog voltages for digital microprocessor.
CPU Ampro 420 core module Microprocessor, plugs into the I/O board.
IB Interface board Most external connections are made to this board.
Typical display ranges for voltages in test mode are:
LED voltage 2.5 - 4.0V (Varies slightly with temperature and cable length.)
Measure voltage Varies with process 0-10V range with 2-8 Vdc nominal.
Temperature voltage 0 to 5 vdc = -25 to 225°C
Before any troubleshooting always check that all cards are properly plugged in, ribbon cables are
properly socketed and that correct power is supplied.