User's Manual

EX7100 Technical Manual - Module Descriptions
©1999 Exicom Technologies (1996) Ltd 7-4 Issue 3 - May 2001
DC Input
From Rear
Panel
Forward
Converter
Isolation
Barrier
Flyback
Converter
+15V
-15V
+5V
-5V
+24V
Figure 7.4: Power Supply Block Diagram
The PSU Measurement Board connected to the Power Supply provides various metering
functions via the terminal’s front panel display (Refer to Section 7.2.2 for details). This is
calibrated to the Power Supply and is considered an integral part of the Power Supply.
7.2.2 Testing and Fault Diagnosis
Note: Refer to Section 5 “Troubleshooting the EX7100” before reading this Section.
The module contains semi-conductor components that are
sensitive to electrostatic damage.
Electrostatic sensitive devices should only be stored and
transported inside electrically conductive static shielding
bags. Fault finding and module replacement must be
performed at “electrostatically safe work stations” where the
work bench surface; soldering iron and the operator are all
earthed to prevent the build up of harmful electrostatic
charges.
General
Front panel diagnostics are available to measure the power supply’s input and output
voltages, and the input current.
To access the PSU Monitoring from idle:
1) From idle, press ‘Enter’
Use the arrow keys to enter the First
Level password ‘1111’ and then press
‘Enter’.
2) Use the up and down arrows until the →
→→
→ is
next to PSU Monitoring and then press
‘Enter’
3) Use the up and down arrows to position
the →
→→
→ next to the required parameter and
then press ‘Enter’ to view
framer
→psu monitoring
+5 VDC rail
→-5 VDC Rail
Password ∗ ∗ 1 ∗
↑