Aeroflex 3500A - Page 157

Subject to Export Control, see Cover Page for details. 3-5
TROUBLESHOOTING TABLE (cont)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
3 CHARGE Indicator does not illuminate
Step 1. Connect the External DC Power Supply to a verifiable AC Power Source
and verify the LED is lit.

If incorrect, replace the External DC Power Supply.
Step 2. Using a DMM on the External DC Power Supply output, verify +18 Vdc
(±1 Vdc).

If incorrect, replace the External DC Power Supply.
Step 3. Verify the Battery is installed.

If incorrect, install the Battery (para 3-3-2).
Step 4. Verify the Fuse is not blown.

If incorrect, replace the Fuse (para 3-3-3).
Step 5. Remove any external power sources from the 3500 / 3500A. Using a
DMM, verify 11.1 Vdc Nominal at the Battery Connector (Red wire).

If incorrect, replace the Battery (para 3-3-2).
Step 6. Connect the External DC Power Supply to the 3500 / 3500A. Using a
DMM, verify 12.6 Vdc at the Battery Connector (Red wire).

If incorrect, refer to Troubleshooting (para 2-2) in the 3500 / 3500A
Maintenance Manual.
4 FAULT Indicator is Red
Step 1. Clear Warning condition in the 3500 / 3500A.
Step 2. Press the POWER Key twice to cycle power.

If FAULT Indicator is still Red, refer to Troubleshooting (para 2-2) in
the 3500 / 3500A Maintenance Manual.
5 FAULT Indicator is Yellow
Step 1. Clear Caution condition in the 3500 / 3500A.
Step 2. Press the POWER Key twice to cycle power.

If FAULT Indicator is still Yellow, refer to Troubleshooting (para 2-2)
in the 3500 / 3500A Maintenance Manual.