Hardware Maintenance Instructions - Presys DMY-2030 Light Technical Manual

PRESYS
 Instruments

4.5 - Hardware Maintenance Instructions

Before returning the instrument to the factory, check the following causes of an
apparently defective indicator.
Instrument with error indication on the display
After turning the instrument on, it tests RAM and E2PROM integrity.
When at least one of these components presents some problem the display shows
the following error codes:
Err. 01 - RAM error
Err. 02 to Err.04 - E2PROM error
In case of RAM error, turn the instrument off and on to check if the error message
is displayed again. If the error remains, return the instrument to factory.
When there is E2PROM error, press the ENTER key and configure the instrument
again. Turn the instrument off and on to check if the error message is displayed
repeatedly. If the error remains, return the instrument to factory.
Instrument with the display off
Check if power supply voltage is provided to terminals 23 and 24 of the Indicator.
Verify the integrity of fuse F1 of 2.0 A placed in the Power Supply Board as shown
in Figure 20. Due to its package it is necessary to check the fuse continuity in order to
detect if it is broken.
Instrument malfunction
Check that the indicator is configured correctly both in terms of software and
hardware (internal jumpers for the output).
Check that the optional modules are installed at the right places.
Check if the voltages on flat cable 1, as shown in Figure 27, are close to the
values in table below and if they reach the CPU Board.
Test points on flat cable 1
Between points 1(-) and 2(+)
Between points 9(-) and 8(+)
Between points 9(-) and 1(+)
Between points (-) and 10(+)
Between points 9(-) and 13(+)
Between points 12(-) and 11(+)
DMY-2030-Light-5S-Energy
Voltages
5 V
8 V
0 V
-8 V
24 V
5 V
Maintenance
Page 39