Filter
Top Products
18 4: Troubleshooting the 4092A
4.2 Troubleshooting Output Problems
If all of the OUTPUT LEDs are red, the unit is not receiving a valid input signal on the active
channel. Look at the INPUT LEDs and resolve the input problem. For more information, see “4.1
Troubleshooting Input Problems” on page 17.
If one OUTPUT LED is red, return the unit to TSC for repair. The output circuits have no user-
serviceable parts. For contact information, see “5.1 Warranty Information” on page 23.
4.3 Troubleshooting Power Supply Problems
Table 5 shows the POWER LED states, their definitions, and actions required.
Table 4: INPUT SELECT LED troubleshooting
INPUT SELECT LED status What it means What do to
One LED solid green and one not
lit
The green LED shows the active
channel and that the unit is in
autoswitch mode, if the toggle
switch is in the center position. The
unlit LED shows the inactive
channel.
No action required.
One LED flashing green and one
not lit.
The flashing green LED shows:
The channel is the active
channel.
The channel was selected
remotely.
The unit is not in autoswitch
mode.
The unlit LED shows the inactive
channel.
No action required, but you can
make the LED solid by moving the
toggle switch on the front panel to
toward the flashing LED until the
LED is solid.
If you want to unit to be in
autoswitch mode, move the toggle
switch back to the center position.
A green and B red Autoswitch occurred due to an
intermittent input or input failure.
Check input level on channel B.
A red and B green Autoswitch occurred due to an
intermittent input or input failure.
Check input level on channel A.
Table 5: INPUT LED troubleshooting
POWER LED status What it means What do to
Power supply 1 green and
power supply 2 red.
Power supply 2 failure or no
power supply installed into
power supply 2 slot.
Replace the failed power supply or set
power supply jumper to one power supply.
For more information, see “4.5
Configuring for Dual Power Supplies” on
page 19.
Power supply 1 green and
power supply 2 not lit.
Power supply jumper is set for
one power supply.
No action required if only one power
supply is installed. If two power supplies
are installed, see “4.5 Configuring for Dual
Power Supplies” on page 19.