S/5
TM
8-Module Frame, F-CU8 -12
29
Document no. M1125635-05
4 Troubleshooting
Figure 8 Monitor troubleshooting flowchart
NO
NO
YES
NO
YES
YES
NO
NO
YES
Monitor not functioning
On/STBY
switch 'ON',
Display connected?
Keyboard
connected?
Connect and chek
Power cord
connected?
OK?
Turn power on by shorting 13
(GND) and 20 (ON/STBY) at
Gas Interface board connector
Is the fan
running?
Any
LEDs lit on the
keyboard?
Start-up
texts appear on
the screen?
Disconnect and reconnect the power cord
Connect power cord
Remove all modules
and turn power on
NONO
The power supply unit
was shut down by instant
over voltage in the
mains. *)
YES
*) NOTE In case of short power
off and automatic start-up see
section 'Power logic board/
Protections' to find the possible
reason
YES
Keyboard trouble. See
part II for
trobleshooting.
NO
Clock etc. appear
on the screen?
NO
NO
Plug in a module
Module data
appear on the
screen?
Pick up next module
YES
YES
NO
Another
module works in
the same
place?
YES
Faulty Module. Go to
Module troubleshooting.
NO
Check
other positions
with same module,
work?
YES
Faulty module mother
board.
Faulty Central Unit. Go
to next page.
NO
fcu8_monitor_trbl_rev_10.vsd
OK? OK?
Is the fan
running?
To Next Page
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