Error Messages
Three error messages are associated with the power supplies functional group.
They are shown here.
n
POWER SUPPLY
SHUT
DOWN!
One
or more supplies on the A8 post regulator assembly is shut down due to
one of the following conditions: overcurrent, overvoltage, or undervoltage.
Refer to “If the Red LED of the
Al5
Is ON” earlier in this procedure.
n
POWER
SUPPLY
HOT
The temperature sensors on the
A8
post regulator assembly detect an
overtemperature condition. The regulated power supplies on A8 have been
shut down.
Check the temperature of the operating environment; it should not be greater
than + 55
OC
(131
OF).
The fan should be operating and there should be at
least 15 cm (6 in) spacing behind and all around the analyzer to allow for
proper ventilation.
n
PROBE
POWER
SHUT
DOWN !
The front panel RF probe biasing supplies are shut down due to excessive
current draw. These supplies are + 15 VPP and -12.6 VPP, both supplied by
the
A8 post regulator. + 15 VPP is derived from the + 15 V supply. -12.6 VPP
is derived from the -12.6 V supply.
Refer to Figure 5-7 and carefully measure the power supply voltages at the
front panel RF probe connectors.
Power Supply Troubleshooting
5-1 g
To Next Page
Loading...
Need help?
General
