MRC MCX-5000 Series, Manual

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MARINE RADIO CO.,LTD.
주
/
선박무선
Subject : Auto Exchanger Page : (37 / 46)
Date : 2010.10.13 Doc. : MCX-5000S_ENG_R1
(QAS-ADD-008/1/10.10.13) manual\pabx\mcx-5000S\MCX-5000S_eng.doc
( MARINE RADIO CO., LTD.) MRC
1. Maintenance and Trouble Shooting
1.1 Cautions before Maintenance
-1. To separate or combine the board, be sure that you turn off the power in order.
-2. When you handle the electronic board, be careful that you do not touch IC and other electronic parts(IC
can be destroyed by static electricity).
-3. When you check the power system, be careful that the short circuit is not made.
Status Symptom and Fail
Unit
Check Point
Power
Fail
1. The power on of
display unit is failure.
Rectifier
1. Check the fuse(F1-10A, F2-3A) of rectifier
2. Check AC & DC power input.
2. Fuse of rectifier
unit is open
continuously.
Rectifier
1. Check the T1 trans and FL2 filter.
2. Check the TR8 - TR13.
Switching
Regulator
1. Check the TR1 and IC1.
3. The fuse of is
normal, but power
on of display unit
is failure.
Switching
Regulator
1. Check the DC output.
2. Check operation of TR2/3/8/9 and IC2/3.
Alarm
Fail
1. The telephone
number is displayed.
All
Telephone
1. Check handset of the telephone.
2. Put a handset down at the proper place.
2. Fail alarm is
ringing continuously.
Switching
Regulator
1. Check the fuse (5A) of the switching
regulator unit.
3. The handset
position fail but
buzzer isn't work.
Buzzer 1. Check the buzzer voltage (DC-24V).
Switching
Regulator
1. Check operation of the RL2 and PC1-2.
3. The display and
buzzer don’t
working.
CPU Board 1. Replace the CPU board.
No link
Of all
Tel.
1. The run lamp of
display unit is flick.
CPU Board
1. Fail of software program.
2. Try to push the reset button.
3. Replace the CPU board.
2. The run lamp of
display unit is
normal on but
impossibility.
Dial Tone
Board
1. Replace the dial tone board.
3. The ring signal
of all tel. is fail
Switching
Regulator
1. Check the cable connector.
2. Replace the switching regulator board.
No link
of some
tel.
1. The side tone is
fail.
The
Telephone
1. Check the line (L1/2, DC-24V) voltage.
I/O Switch
Board
1. Check the relay(RL1-8) and
resistor (R13-21) of related I/O switch board.