Ericsson LBI-39001 Spezifikationen PDF herunterladen (Seite 4)

MAINTENANCE

PREVENTIVE MAINTENANCE

To ensure high operating efficiency and to prevent me-

chanical and electrical failures from interrupting system opera-

tions, routine checks should be made of all mechanical and

electrical parts at regular intervals. This preventive mainte-

nance should include the checks as listed in the table of Main-

tenance Checks that follows.

ASSEMBLY AND DISASSEMBLY

Easy access to the station is inherent in this design. Simply

unlock the door and swing it open. The station and radio pack-

age are hinged so that they can swing out for servicing.

To release the entire station and allow it to swing out, re-

move the three screws on the left that secure the chassis to the

cabinet brace. Then press the spring clip.

Loosening the right side radio mounting screws allows the

radio package to hinge open, providing access to the Remote

Board, Interconnect Board, and Option Boards.

Remote Board

To remove the Remote Board, remove the POZIDRIVOR



screw in the four corners of the board and remove the board.

Unplug cabling as necessary.

Interconnect Board

To remove the Interconnect Board, remove the four screws

securing it to the chassis and disconnect all cabling. Remove

the Interface Board and/or the Keypad Board if necessary.

OPTION INSTALLATION

INSTRUCTIONS

Most options are radio options, and are thus the same in

both installation and operation when the radio is used in the

Wall Mount application. Refer to the applicable Maintenance

Manual for mobile radio options.

BATTERY STANDBY OPTION

An external battery can be used to power the station in the

event of AC power failure. The battery and charger must be

supplied by the customer. The standby option consists of Op-

tion Cable Assembly 19B802942. Refer to the Battery

Standby Option Application Assembly for installation.

INITIAL ADJUSTMENT AND

CHECKOUT

After the station has been installed as described in the In-

stallation Manual, the following adjustments should be made

by an authorized electronics technician.

TEST EQUIPMENT REQUIRED

1. Deviation Monitor

2. Wattmeter, 50 ohms, 150 Watts

3. RF Generator, (Station RF Frequencies)

4. AC Voltmeter

5. 30 dB Decoupler

TRANSMITTER ADJUSTMENT

The adjustment for the transmitter includes measuring the

forward and reflected power, adjusting the antenna length for

optimum ratio, and then setting the transmitter to rated power

output. Next, measure and record the frequency and modula-

tion for future reference. For complete transmitter adjustment,

refer to the Alignment Procedure in the applicable radio unit

Maintenance Manual.

RECEIVER ADJUSTMENT

Initial adjustment for the receiver includes adjusting the

audio output power for 3 watts across the speaker. Refer to the

Maintenance Manual for the radio being used for Trou-

bleshooting and Alignment Procedures, or Adjustments.

STATION ADJUSTMENT

PROCEDURES

Your station was adjusted at the factory. If adjustment is

needed due to board replacement, or other reasons, perform the

following steps.

REMOTE SETUP

Receiver to Line

1. Turn ON Power and Speaker switches.

2. Set REMOTE and INTERCOM switches to OFF.

3. Connect the RF Generator to the station. Set the proper RF

frequency and a 1 kHz tone at 3 kHz deviation.

4. Connect the proper RCN1000 Remote Controller to J11 on

the rear of the station chassis.

5. No tone should be present at the Remote Controller.

6. Turn on the REMOTE switch. A tone should be present

at the Remote Controller.

a. On the Tone Remote Board (19A704686P6) set R35

for 0 dBm at J1-3 and J1-4.

b. On the EDACS Tone Remote Board (19A704686P8)

set R66 for 0 dBm at TB1-2 and TB1-5.

7. Turn OFF the station REMOTE switch. Disconnect the

RF Generator and connect the wattmeter to the station

through the 30 dB decoupler.

8. Apply a 30 mVRMS 1 kHz tone across J101-1 Desk Mic

Hi and J101-2 Desk Mic Lo.

9. Ground J101-3 Desk Mic PTT. Measure the RF power

on the wattmeter.

10. With J101-3 grounded, check for 20 to 43 mVRMS, 1

kHz tone across J209-5 (Mic Hi) and J209-7 (Mic Lo).

Check to verify that no tone is present at the Remote

Controller. Remove the ground. (An isolation trans-

former may be required.)

11. Switch the INTERCOM switch ON. Ground J101-3

Desk Mic PTT. Check to verify that the radio does not

key (no power on the wattmeter). Check to verify that a

tone is present at the Remote Controller. Press the IN-

TERCOM switch to the MOM position and check for a

tone at the Remote Controller. Release the INTERCOM

switch.

a. On the (931) Interface Board, set R323 for 0 dBm at

J1-3 and J1-4 on the (686P6) Tone Remote Board..

b. On the (931) Interface Board, set R323 for 0 dBm at

TB1-2 and TB1-5 on the (686P8) PST Remote Board.

Line to TX

1. Set Station Remote switch and InterCom switch to OFF.

2. Apply 1 kHz at 120 mV to Microphone input of the Con-

troller.

3. On the Controller, press SF5 on EDACS only, and

ground PTT. Check to see that the Radio is not keyed.

4. Switch the Station Remote switch ON. Key the Control-

ler. Check to see that the radio is keyed.

5. The Controller should be preset to 0 dBm.

a. On the 686P6 PST Remote Board, set R60 for 60

mVRMS at J209-5 and J209-7.

b. On the 686P8 PST Remote Board, set R82 for 60

mVRMS at J209-5 and J209-7.

6. Before leaving the station, make sure the INTERCOM

and SPEAKER switches are OFF, and the REMOTE

switch is ON.

TABLE OF MAINTENANCE CHECKS

INTERVAL BETWEEN CHECKS

Every Six Months As Required

Transmitter Alignment - Compare meter readings with voltages read during

initial tune up. Check power output. (See Alignment Procedure for

Transmitter.)

Receiver - Retune the front end and check meter readings taken during

initial tune-up. (See Alignment Procedure for Receiver.)

Transmission Line - Check for positive indication of pressure on

transmission line pressure gauge (if pressurized line is used).

Antenna - Check antenna and mast for mechanical stability. X

Mechanical Inspection - Visually check cables, plugs, sockets, terminal

boards, and components for good electrical connection. Check for tightness

of nuts, bolts, and screws to make sure that nothing is working loose from

its mounting.

Cleaning - Use a vacuum cleaner to remove accumulated dust inside the

cabinet.

Frequency Check - Check transmitter frequency and deviation as required. X

The battery standby option does not recharge the bat-

tery.

NOTE

LBI-39011B

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