Ericsson LBI-39175A manual Preventive Maintenance, Maintenance Checks Interval

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LBI-39175A

MAINTENANCE

PREVENTIVE MAINTENANCE

NOTE

To ensure high operating efficiency, and to prevent mechanical and electrical failures from interrupting system operations, routine checks should be made of all mechanical and electrical equipment at regular intervals. This preventive maintenance should include the checks as listed in Table 1, Maintenance Checks.

Table 1 - Maintenance Checks

MAINTENANCE CHECKS

 

INTERVAL

 

 

CONNECTIONS - Ground connections and connections to the voltage source

 

should be periodically checked for tightness. Loose or poor connections to the

 

power source will cause excessive voltage drops and faulty operation.

When

Every

ground connections are not made directly to the battery, the connection from the

6

battery to vehicle chassis must be checked for low impedance.

A high

months

impedance may cause excessive voltage drops and alternator noise problems.

 

 

 

ELECTRICAL SYSTEM - Check the voltage regulator and alternator or

 

generator periodically to keep the electrical system within safe and economical

 

operating limits. Overvoltage is indicated when the battery loses water rapidly.

As

Usage of 1 or 2 ounces of water per cell per week is acceptable for batteries in

Required

continuous operation. A weak battery will often cause excessive noise or faulty

 

operation.

 

 

 

 

MECHANICAL INSPECTION - Since mobile units are subject to constant

 

shock and vibration, check for loose plugs, nuts, screws, and parts to make sure

Every 6

that nothing is working loose. Be sure that all screws are properly torqued.

months

 

 

ANTENNA INSPECTION - The antenna, antenna base, and all contacts should

 

be kept clean and free from dirt or corrosion. If the antenna or its base should

Every 6

become coated or poorly grounded, loss of radiation and a weak signal will

months

result.

 

 

 

 

ALIGNMENT - The transmitter and receiver measurements should be checked

As

periodically. Refer to the applicable Alignment Procedure and troubleshooting

Required

sheet for typical voltage readings.

 

 

 

 

FREQUENCY CHECK - Check transmitter frequency and deviation, as

 

required by the FCC. Normally, these checks are made when the unit is first put

As

into operation, after the first six months, and once a year thereafter.

 

Required

 

 

 

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Contents LBI-39175A Table of ContentsDescription TransmitterReceiver Maintenance Checks Interval MaintenancePreventive Maintenance Maintenance ChecksControl Unit Front Mounted Disassembly ProcedureTo Remove the Unit from the Mounting Bracket Transceiver Txrx ModuleTo Re-Assemble Unit after Servicing Front Mount Control Unit O-Ring Lubrication Introduction Alignment ProceduresLBI-39175A Test Frequencies Tracking DataSinad Setting Tracking DataSituation NEW Tracking Data Parameter LimitPA Transistor Replacement Transmitter AlignmentTo Replace the PA RF Transistors Adjustment Procedures Receiver AlignmentTest Equipment Required Troubleshooting Guide Squelch AdjustmentMicrophonics Serviceable Parts Typical Orion Test Configuration Diagnostic ProceduresAdditional Tools Required TransmitterPA PWB PWB ReceiverEGE Control UnitError Codes All System Groups Orion System ErrorsGeneral Fatal Errors NON-FATAL ErrorsError Message Description Operational Software Non-Fatal System Errors ROM Fatal Systems ErrorsDacsnolock No Lock Operational Software Fatal System ErrorsMessage Code Radio Programming ErrorsEricsson Inc