Subject to Export Control, see Cover Page for details. 2-7
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 2-4A).
Step 4. Verify the Fuse is not blown.
If incorrect, replace the Fuse (para 2-4B).
Step 5. Remove any external power sources from the Test Set. Using a DMM,
verify 11.1 Vdc Nominal at the Battery Connector (Red wire).
If incorrect, replace the Battery (para 2-4A).
Step 6. Connect the External DC Power Supply to the Test Set. Using a DMM,
verify 12.6 Vdc at the Battery Connector (Red wire).
If incorrect, replace the Power Supply PCB Assy (para 2-4D).
Step 7. Troubleshoot the circuit between the Power Supply PCB Assy and the LCD
Assy.
Probable source of failure is the Power Supply PCB Assy.
Probable source of failure is the RF Digitizer PCB Assy.
Probable source of failure is the Multi-Function PCB Assy.
Probable source of failure is the LCD Assy.
4 FAULT Indicator is Red
Step 1. Clear Warning condition in the Test Set.
Step 2. Press the POWER Key twice to cycle power.
Step 3. Troubleshoot the circuit between the Power Supply PCB Assy and the RF
Assy.
Probable source of failure is the Power Supply PCB Assy.
Probable source of failure is the RF Digitizer PCB Assy.
Probable source of failure is the Multi-Function PCB Assy.
Probable source of failure is the RF Assy.
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