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Use this procedure to determine
if the A6 CPU board or the
front panel module is bad.
Turn on the PRINCIPAL
POWER SWITCH.
Do all
front panel LEDs turn on
and then turn off a short
time later?
Yes
Does one front
panel LED turn on and
then turn off, followed by the next
LED until all LEDs have
turned on and then
turned off?
Yes
The front panel
module is ok.
Figure 6-33: Troubleshooting Procedure 2
AWG2021 Service Manual
No
Push the ON/STBY button.
Do all
front panel LEDs turn on
and then turn off a short
time later?
Yes
No
A6 CPU Board or Front panel Module
Do the
No
No
front panel LEDs
turn on?
Yes
Are all front
panel cables securely
installed in their sockets
and are the
cables ok?
Yes
Replace the A6 CPU
board (page 6-42).
Troubleshooting
Is there
Yes
5 V between TP101
(GND) and TP100
(see Figure
6-34)?
Replace the
front panel
No
module
(page 6-22).
No
Securely install and/ or
replace the front panel
cables.
6-59
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