MAINTENANCE MANUAL
IFR 6000
2-2-2
Page 4
Aug 1/06
TROUBLESHOOTING TABLE
NOTE: The Troubleshooting Table lists common malfunctions found during normal operation or
maintenance of the Test Set or components. The tests or inspections and corrective
actions should be performed in the order listed. Failure to do so may result in
troubleshooting recommendations that replace working assemblies.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1 External DC Power Supply failure
Step 1. Connect External DC Power Supply to a verifiable AC Power Source.
Step 2. Connect DMM to External DC Power Supply output.
Step 3.
Verify +18 Vdc (±1 Vdc)
If incorrect, probable source of failure is the External DC Power
Supply.
2 POWER Indicator does not light
Probable sources of failure are the circuit between Power Supply PCB
Assy and the LCD Assy and a short on the Multi-Function PCB Assy or the
RF Assy.
3 CHARGE Indicator does not light
Probable sources of failure are the Battery, Power Supply PCB Assy and
the LCD Assy.
4 Blows Fuse
Probable source of failure is the Power Supply PCB Assy .
5 Battery does not charge
Probable source of failure is the Battery.
6 Display is blank or abnormality exists in Display
Probable sources of failure are the Power Supply PCB Assy, Multi-
Function PCB Assy, LCD Assy and the interconnecting cables.
7 Keys Inoperable
Probable sources of failure are the Keypad PCB Assy, Multi-Function PCB
Assy and the interconnecting cables.
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