Assessments - 4, GPA: 2.8
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4.2 Diagnostic Test This test checks the transceiver for proper operation. It should be conducted regularly to ensure proper operation. If a DSC or NBDP terminal is connected, the test should be conducted together with them. Before starting the test, set the RF GAIN control to maximum (fully clockwise). 1. While pressing and holding down the [TX] key, turn on the power. All LCD segments appear. 2. Release the [TX] key. The FS-1562 starts diagnostics and the following indications appear. -4.1 R Receiver section tested successfully. T T Transmitter Exciter stage is tested successfully. Transmitter Power Amplifier stage and Antenna Coupler (Coupler and Dummy Board) are tested successfully. If a fault is detected, “no Good” appears instead of “Good” and the associated indication blinks after completion of this test. Turn off the transceiver on completion of tests. Turn on again for normal operation. -4.2 4.3 LCD/Keyboard Test & ROM Version No. Confirmation 1. While pressing and holding down the [ENT] key, turn on the power. All LCD segments appear. 2. Release the [ENT] key. 3. Press keys one by one. Check if the indication on the operation display is correct as shown below: Key 1 2 3 TX Indication Key 4 5 6 RX Indication Key 7 8 9 RCL Indication Key 2182 0 ALARM ENT Indication Example: The [2] key is pressed. The following appears. In a few seconds, 7 characters x 2 lines readout change to all . WXITU CLAR TR 02 4 68 10 SRF ANTLOW TUNE SQ MEMOREMCOMDUMMYTONE LSBJ3ER3ECWH3ETLXFAX ATTPREAGCNBSWEEPSCAN DUP SIMP 01 2 34 5 OK A B PRIVUSA ROM VERSION NO. Turn off the transceiver on completion of tests. Turn on again for normal operation. -4.3 4.4 Antenna Coupler Test The CPU and the relays which select capacitors and coils for tuning can be checked. For Competent technicians only DANGER HIGH VOLTAGE Still alive at OFF Discharge beforeservicing DANGER -Electrical Shock Hazard Procedure 1. Open the antenna coupler cover. 2. Open the shield cover inside the coupler. 3. Turn on No. 2 of the DIP switch S2. 4. Press the TUNE switch in the antenna coupler. 5. 24 LEDs (CR1 to CR24) light one by one every second. The relays trip on with the corresponding LEDs. CR1 ON - K1 ON CR2 ON - K2 ON . . . CR22 ON - K22 ON (CR23 not provided) CR24 ON - K24, K25 ON 6. Turn off No. 2 of the DIP switch S2. 7. Close the cover. If a CPU error is detected, CR1 lights for ROM error, CR2 for RAM error, CR3 for A/D converter error. (ROM/RAM/AD Converter is incorporated in the CPU.) COUPLER BOARD LED DIP switch S2 behind the shield case TUNE SWITCH -4.4 4.5 Maintenance This radiotelephone equipment is designed and manufactured to provide years of intended performance. For this, a regular maintenance program should be established and should at least include the items listed in below: Item Whip antenna Check Point Check for physical damage, corrosion and water leakage Remedy/Remarks Replace damaged parts. Wire antenna Check that antenna is properly spanned and separated sufficiently apart from metallic structures. If necessary, re-span the antenna. Insulators for antenna installation Check for salt water accumulation on insulators. Check that connection at lead-in insulator is tight and rust-free. Replace damaged insulators. Remove salt water deposits. Clean with fresh water, then dry. Remove rust, then tighten bolts and lock nuts. Cover metallic surface with sealing compound. Antenna coupler Check contact at * Antenna terminal * Ground connection * Coaxial cable * Control cable(terminal board) Tighten loosened connections. Check that coupler lid and cable glands are firmly secured. Fasten lid firmly and evenly to prevent water leakage. Check for physical damage, corrosion and salt water deposits. Replace if damaged. Transceiver Check contact at * Antenna cable * Ground connection * Power cable * Control cable Tighten loosened connections; remove foreign material from connectors. Confirm that there are no objects on the top of the cabinet. Remove objects to prevent overheating. Power Amp Unit (PA-2500) (for 250 W set) Check contact at * Coaxial cable * Antenna cable * Power cable Tighten loosened connections; remove foreign material from connectors. Confirm that there are no objects on the top of the cabinet. Remove objects to prevent overheating. Power supply Check that supply voltage at transmission is within the rated range. (21.6 to 31.2 VDC at the power connector) If not within the range, call for service, Low voltage may cause erratic operation. -4.5 Item Check Point Remedy/Remarks Power cable Check for loosened or corroded Clean and tighten. connection at power terminals. Battery Check that the battery is fully charged. If discharged, charge. Feeder (coax Check for physical damage. Replace if damaged. cable, control cable) PCB connection Check that jumper cables between boards Reconnect loosened connections are firmly connected. of jumper cables. Microphone Check that jumper cables between boards Fasten if loosened. are firmly connected. -4....
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