Sony Tektronix AWG2021 Service Manual page 191

Press the PRINCIPAL
POWER SWITCH on the rear
panel of the AWG2021.
Can you
hear the fan
whirling?
Yes
With the AWG2021
power on, do the front
panel lights come on
and then go off a short
time later?
Yes
Does the
display seem
to be working
at all?
Yes
Does the
AWG2021 respond
correctly when the
front panel buttons
are pushed?
Yes
Does the
AWG2021 power
on and pass all the
diagnostics?
Yes
Done.
Figure 6-27: Primary Troubleshooting Procedure
AWG2021 Service Manual
Push the ON/STBY
No
button. Can you
hear the fan now?
Yes
Perform the front panel
No
module troubleshooting
procedure 2
(page 6-59).
No
Power off the AWG2021
and remove the cabinet
using the Rear Cover and
Cabinet removal
procedure.
Perform the power
supply module
No
troubleshooting
procedure 2
(page 6-56).
Perform the module isolation
No
troubleshooting procedure 4
(page 6-64).
Power off and remove the cover
using the Rear Cover and
Cabinet removal procedure.
No
Check all the cables coming out
of the power supply module and
the cabling between modules.
Be sure every cable is attached
securely.
Replace the A6
CPU board
(page 6-42).
Yes
Does the
red LED on the
A6 CPU board
(See Figure
6-26) light?
Troubleshooting
Perform the power
supply module
troubleshooting
procedure 1
(page 6-56).
Perform the monitor
No
module troubleshooting
procedure 3
(page 6-61).
6-55