Frick QUANTUM Maintenance Manual page 7

FRICK QUANTUM COMPRESSOR CONTROL PANEL
setpoint and calibration data values
that need to be customized must be
reentered.
5. Check for bad connections.
6. Check the display. If the CPU board is
booting but you have no display, check the
following:
· Check the LCD backlight tube. Look
very closely at the display to see if
anything is visible in the dark screen.
You will need good lighting and look for
any "ghost" type image. If it appears that
there is something on the screen but
very dark, the problem maybe the LCD
backlight tube. On the LG Philips, NEC
and Sharp displays this tube is field
replaceable. On the Samsung LCD
display it is not available and the display
will have to be replaced. You must take
the display apart to identify the display
manufacturer.
·
Verify that both the display cable and
the inverter cable are firmly seated. It
may be necessary to remove the video
cable from the back of the LCD display
and reseat it to be sure it is connected
properly.
Note:
connector and caution should be
observed so that it is not damaged
due to excessive force.
· Check the backlight inverter connector
(P4). When the Quantum board is
mounted in the panel, this connector is
located at the middle left of the board.
The pins on the right side are odd
numbered, with pin P(1) at the bottom -
pin P(9) at the top. The pins on the left
side are even numbered, with pin P(2)
at the bottom - pin P(10) at the top. After
the Quantum has booted, pin P(3)
should measure +2.4Vdc, pins P(4) and
P(5) are DC grounds, and pins P(6) and
P(7) should measure +12Vdc. A bad
inverter will also cause a dark display.
·
Reference the
Component Replacement Guide" at the
end of this section and check that the
LCD, LCD cable, and software versions
are matched correctly.
MAINTENANCE
This is a small
"Display Assembly
Quantum 4
1. If no LED's are lighted, then check power AC
and DC.
2. Check if the lighting of the LED's is occurring
as de-scribed in the "What Should Occur
When Powering Up The Panel" section.
·
If the powering up sequence continues
to repeat
"Operating Status" screen, then there is
a booting problem.
3. Check if an error message is displayed when
booting.
· Be sure to write down any error
messages that appear.
4. Check that the software is OK:
· Is the correct software installed?
· Did you just install new software?
·
If you need to clear the numerical
setpoint and
memory for any reason, clear the
memory as described in the S90-010
FSI publication.
information
factory default
setpoint and calibration data values
that need to be customized must be
reentered.
5. Check for bad connections.
6. Check the display. If the CPU board is
booting but you have no display, check the
following:
· Check the LCD backlight tube. Look
very closely at the display to see if
anything is visible in the dark screen.
You will need good lighting and look for
any "ghost" type image. If it appears that
there is something on the screen but
very dark, the problem maybe the LCD
backlight tube. On the LG Philips, NEC
and Sharp displays this tube is field
replaceable. On the Samsung LCD
display it is not available and the display
will have to be replaced. You must take
the display apart to identify the display
manufacturer.
·
Verify that both the display cable and
the inverter cable are firmly seated. It
may be necessary to remove the video
cable from the back of the LCD display
and reseat it to be sure it is connected
properly.
Note:
connector and caution should be
observed so that it is not damaged
due to excessive force.
· Reference
Component Replacement Guide" that
follows, and check that the LCD, LCD
cable, and
matched correctly.
S90-010 M
Page 7
without displaying the
calibration areas of
NOTE: This
will be replaced by
values, so any
This is a small
the "Display Assembly
software versions are