Troubleshooting
TDS 310, TDS 320 & TDS 350 Service Manual
6Ć43
Yes
No
Done.
No
Yes
Use this procedure to
determine if a problem is
caused by the Low Voltage
Power Supply.
Do you
hear the
clicking?
Press the ON/STBY button
a few times and listen for a
relay clicking sound.
No
Yes
Is the fuse
blown?
Yes
No
Replace
fuse. Does
fuse blow
again?
Yes
No
Does
oscilloscope
work?
Does
the oscilloscope
power up and are the
secondary voltages
(TableĂ6Ć4)
ok?
The LVPS
module is ok.
Replace LVPS
module.
Remove cable
from J1 on the
LVPS module.
Yes
No
Is
there 1
to 1.5V on pin 13
of the
connector?
The LVPS module is ok. Perform
the Front Panel/Processor
troubleshooting procedure.
Power off the oscilloscope and
disconnect J2 from the LVPS
module. Power back on.
Yes
No
Are the
secondary
voltages
ok?
Replace the Monitor module.
Disconnect the power
cord. Disconnect J1
from the LVPS module.
Reconnect power.
Yes
No
Are the
secondary
voltages
ok?
Perform the Supply Overload
troubleshooting procedure
(Figure 6Ć29).
Power off the oscilloscope
and disconnect J4 from the
LVPS module. Power back on.
Yes
No
Are the
secondary
voltages
ok?
Replace the option module.
Figure 6Ć27:ăPower Supply Troubleshooting Procedure
