Marine Radio MPA-2000 Series Configuration guide

MPA‐2000PUBLICADDRESSSYSTEM

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MARINE RADIO CO., LTD.
주/선박무선 Subject : Public Address System Page : (3 / 24)
Date : 2010.12.18 Doc. : MPA-2000_Eng(Rev. 1.0)
(QAS-ADD-008/0/09.09.25) manual\pa\MPA-2000\MPA-2000.doc (MARINE RADIO CO., LTD.)
MRC
Contents
1. General Description ............................................................................................................................... 4
1.1 Features of the PA system .............................................................................................................. 4
1.2 Name of Model ............................................................................................................................... 4
1.3 Outline of Main Unit ........................................................................................................................ 4
1.4 System Configuration ..................................................................................................................... 5
2. Electric Specifications ............................................................................................................................ 5
2.1 Main Unit of PA system ................................................................................................................... 5
2.2 Talk-Back ........................................................................................................................................ 5
2.3 Paging Call ..................................................................................................................................... 5
2.4 Built in Equipment ........................................................................................................................... 6
3. Operation and Specifications ................................................................................................................. 6
3.1 Outline of Main Unit ........................................................................................................................ 6
3.2 Amplifier Unit (PA-122) ................................................................................................................... 7
3.3 Monitor Speaker Panel (PP-122) .................................................................................................. 7
3.4 Radio & Cassette Unit (PR-122, Option) ........................................................................................ 7
3.5 Radio, CD-Player Unit (Option) ...................................................................................................... 9
3.6 Interfaces with Emergency GeneralAlarm Generator .................................................................. 10
3.7 Interface Priority of Broadcasting ............................................................................................... 10
3.8 P/A Remote Controllers ..................................................................................................................11
3.9 System Diagram .............................................................................................................................12
3.10 Interfaces with External Audio Input .............................................................................................13
3.11 Broadcasting with Telephone ...................................................................................................... 13
4. Maintenance and Trouble Shooting ..................................................................................................... 14
4.1 Power Source of system ............................................................................................................... 14
4.2 Speaker ........................................................................................................................................ 15
4.3 Remote Controller ....................................................................................................................... 16
4.4 Microphone of system .................................................................................................................. 16
4.4.1 Connection between terminal board and microphone connector .......................................... 16
4.4.2 Testing of Microphone ............................................................................................................ 16
4.5 Pre and Main-amplifier ................................................................................................................. 17
4.5.1 Pre-amplifier ........................................................................................................................... 17
4.5.2 Main-amplifier ........................................................................................................................ 17
4.6 Setup Method of Main Control PCB ............................................................................................. 17
4.6.1 Priority Selection between W/H controller and main unit ....................................................... 17
4.6.2 Setup microphones stop of Emergency Alarm Generator ..................................................... 18
4.6.3 Setup microphones of talk-back group .................................................................................. 18
4.6.4 Setup of Speaker Control Diode Matrix ................................................................................. 19
4.6.5 Setup of Speaker Selector PCB Jumper ............................................................................... 19
4.7 Setup Power Source Voltage (AC-100/220V) Setup .................................................................... 20
4.8 Setup Power Source Voltage (AC-100/220V) Setup .................................................................... 20
4.9 Connection between Microphone and Speaker in Main Unit ....................................................... 21
4.10 Setup Power Source Voltage (AC-100/220V) Setup .................................................................. 22
5. Installations .......................................................................................................................................... 23
6. PA Shop Test Procedure ...................................................................................................................... 24

MARINE RADIO CO., LTD.
주/선박무선 Subject : Public Address System Page : (4 / 24)
Date : 2010.12.18 Doc. : MPA-2000_Eng(Rev. 1.0)
(QAS-ADD-008/0/09.09.25) manual\pa\MPA-2000\MPA-2000.doc (MARINE RADIO CO., LTD.)
MRC
1. General Descriptions
1.1 Features
This public address system is designed for general broadcasting from specific area and for marine use.
-1. Since the system is completely designed by C-MOS, transistor and semiconductor, performance is
superior to the same rank.
-2. Deal with requirement of the ship, adapted to diode matrix construction.
-3. The construction of the system is carefully designed for convenience of operation and made for interface
from public address system, fire detection system, whistle controller and general emergency alarm
generator.
-4. Since the automatic AC-DC changer over circuit is adopted, therefore the systems excel ability at
emergency situation.
-5. The system is designed about ability of the drip-proof, water-proof, impact-proof and corrosion-proof
because of marine use.
1.2 Name of Model
Item Model Code Specification Etc
Main Unit
MPA-2100 CE 220VAC/24VDC 100W Desk, Top/Wall Mounting Type
CD 220VAC/24VDC 100W W/Radio & CD Player Desk Top/Wall Type
MPA-2200 CE 220VAC/24VDC 200W Desk, Top/Wall Mounting Type
CD 220VAC/24VDC 200W W/Radio & CD Player Desk Top/Wall Type
MPA-2300 CE 220VAC/24VDC 300W Desk, Top/Wall Mounting Type
CD 220VAC/24VDC 300W W/Radio & CD Player Desk Top/Wall Type
Remote
Controller
MPC-1820 A Flush Type
MPC-1821 A NWT Wall Type
MPC-1822 A WT Wall Type
* PA: Public Address,
*GA: General Alarm
1.3 Outline of Main Unit
-1. Main Control Unit (PC-122)
-2. Entertainment Unit (Option)
-3. Amplifier Unit (PA-122)
-4. Power Supply and Monitor Speaker Panel (PS-122)

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Date : 2010.12.18 Doc. : MPA-2000_Eng(Rev. 1.0)
(QAS-ADD-008/0/09.09.25) manual\pa\MPA-2000\MPA-2000.doc (MARINE RADIO CO., LTD.)
MRC
Model Outline Bottom Fixing Rear Fixing
MPA-2100 432(W) x 470(H) x 305(D) 332(W) x 185(D), 4-Ø12 332(W) x 345(H), 4-Ø12
MPA-2200 432(W) x 596(H) x 305(D) 332(W) x 185(D), 4-Ø12 332(W) x 471(H), 4-Ø12
MPA-2300 432(W) x 722(H) x 305(D) 332(W) x 185(D), 4-Ø12 332(W) x 597(H), 4-Ø12
Dimensions(WidthxHeightxDepth)
1.4 System Configuration
1. Audio Input: MIC, Radio, Cassette, Auto-Telephone System, Alarm Generator, Ext Audio etc.
2. Control Signal: Main, remote other signal operating panel.
3. Microphone Relay Unit: Selected audio signal is connected to next unit.
4. Pre Amplifier: That is amplified earlier than main amplification.
5. Main Amplifier: Main Power Amplifier
6. Interface: The unit combines external control signal and main unit.
7. Priority: Audio input signal is selected by the unit.
8. Speaker Selector: The unit selects speaker from front and remote operating panel.
9. Matrix: The unit is fixed to connection of speaker and microphone according to request of owner.
2. Electric Specifications
2.1 Main Unit
-1. Power Output : 100W/200W/300W, etc
-2. Frequency Characteristics : 300 ～5000Hz within 6dB
-3. Distortion & S/N Ratio : less than 5% / more than 50 dB
-4. Source of Power (Single) : AC-220V/100V, DC 24V
-5. Power Consumption (Single) : 16A, per 200W (DC 24V)
: 2.5A per 200W (AC 220V), 5.6A per 200W (AC 100V)
-6. Operating Temperature Range : -10℃～+40℃
-7. Operating Humidity : less than 90%
2.2 Talk-Back
-1. Talk-Back Area : Wing (PORT)
: Wing (STBD)
: Upper Deck FORE
: Upper Deck AFT
: SGR (Steering Gear Room)
: ECR (Engine Control Room)
: CCR (Cargo Control Room)
2.3 Paging Call
-1. All Paging Call : "0"
-2. Group Paging : "8", "9"(Option)

MARINE RADIO CO., LTD.
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Date : 2010.12.18 Doc. : MPA-2000_Eng(Rev. 1.0)
(QAS-ADD-008/0/09.09.25) manual\pa\MPA-2000\MPA-2000.doc (MARINE RADIO CO., LTD.)
MRC
2.4 Built in Equipment
2.4.1) Radio Tuner & Cassette Player (Option)
a) Radio Tuner
-1. Receiving System : Super heterodyne System
-2. Receiving Frequency MW (AM) : 531 - 1602 KHz
MW (AM) : 522 - 1629 KHz (Option, Japan User Only)
FM : 87.50 - 108.0 MHz
FM : 76.0 - 90.0 MHz (Option, Japan User Only)
-3. Receiving Sensitivity MW (AM) : less than 30 uV
FM : less than 20 uV
-4. S/N Ratio : more than 50 dB
-5. Intermediate Frequency FM : 10.71 MHz,
MW : 450 KHz
b) Cassette Tape Deck Section
-1. Playback system : 4-Track, Monaural - 2way Playback
-2. Tape Speed : 4.75 cm/s
-3. Wow & flutter : less than 0.18% Wrms
-4. Frequency Characteristics : 63 Hz - 15 KHz
-5. Distortion : less than 5% (with Rated Output)
-6. S/N Ratio : more than 60 dB
2.4.2) CD-Player Section (Option)
-1. S/N Ratio : more than 90 dB
-2. Frequency Characteristics : 10 Hz - 20 KHz
-3. Wow & flutter : Below Measurable Limit
-4. Distortion : less than 5% (with Rated Output)
3. Operation and Specifications
3.1 Main Control Unit (PC-122)
-1. MIC: Micro-Phone Jack
-2. MIC VOL (Micro-Phone Volume): This potentiometer regulates input volume of the microphone of
main unit. (Usually it shall be set to around the middle)
-3. DIMMER: This switch control brightness of the "BUSY" and "POWER" indicator's LED.
-4. BUSY: Broadcasting Indicator.
-5. CALL: When the button is pushed, then alarm oscillator is activated. The alarm signal is 800Hz.
-6. SPEAKER SELECTOR: This switch selects operation of the speaker.
-7. POWER: "ON" and "OFF" Switch of Main Power.

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Date : 2010.12.18 Doc. : MPA-2000_Eng(Rev. 1.0)
(QAS-ADD-008/0/09.09.25) manual\pa\MPA-2000\MPA-2000.doc (MARINE RADIO CO., LTD.)
MRC
3.2 Amplifier Unit (PA-122)
-1. U/V Meter: That is displayed output power.
-2. FUSE: No.1/2 Amplifier Unit Fuse (15A)
3.3 Monitor Speaker Panel (PP-122)
-1. Main Power Switch
-2. Emergency Power Switch
-3. Monitor Speaker
-4. MONI VOL: The potentiometer controls of volume for monitor speaker
3.4 Radio & Cassette Unit (PR-122, Option)
-1. Power On/Off and Volume Control Switch
-2. Display Window: Display information of radio and cassette player.
-3. EJECTOR: You can change a cassette type using the button.
-4. SEEK: Use scan tuning to automatically scan the stations in the frequency range of a band.
-5. Cassette Type Insert Hole

MARINE RADIO CO., LTD.
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Date : 2010.12.18 Doc. : MPA-2000_Eng(Rev. 1.0)
(QAS-ADD-008/0/09.09.25) manual\pa\MPA-2000\MPA-2000.doc (MARINE RADIO CO., LTD.)
MRC
-6. LOC: Attenuation button of reception sensitivity.
-7. ◂◂/▸▸: Tape FF(◂◂) or REW(▸▸) Switch.
-8. BAL: Audio output balance control button.(Impracticable button at this model)
-9. ∧: Radio Frequency Tuning UP button.
-10. ∨: Radio Frequency Tuning DOWN button.
-11. BAND: Radio (AM/FM) Selection or Conversion Button.
-12. ME: You can preset up to 6 stations in a band with the preset buttons "1” to "6".
-13. DISP: Display control button of radio frequency and clock alternatively.
-14. MTL: Metal tape using time.
(1) Broadcasting with cassette tape deck (In case of built in cassette tape deck)
(a) Push the "POWER" switch of the main unit.
(b) Set the "SPEAKER SELECTOR" to "OFF".
(c) Set the "VOLUME" to around the middle.
(d) Set the "MONI VOL" to around the middle of the monitor panel.
(e) Push the tape button of the R/T unit.
(f) Set the "SPEAKER SELECTOR" to desired position.
(g) Operation of the cassette tape deck.
-1. If you search to other part of the tape, please push the FF(∧) or REW(∨) button.
The tape deck does not operate properly, in the course of the operation.
FF(∧): Please push to the button when you want to operate so fast in the moving forward direction.
REW(∨): Please push to the button when you want to rewind the tape so fast.
-2. Ejection: When you try to eject the tape from the cassette holder, if you push this ejector ("5")
button, the cassette tape spring out in ejecting from holder.
(2) Broadcasting of radio program
A. In case of built in radio tuner
(a) Push the "POWER" switch of the main unit.
(b) Set the "SPEAKER SELECTOR" to off.
(c) Set the "VOLUME" to around the middle.
(d) Set the "MONI VOL" to around the middle of the monitor panel.
(f) Operation of the radio tuner.
a) Push the POWER ON/OFF ("8") switch of the radio tuner.
b) "AM/FM”: Push the switch of the desired band on receiving bands selector of the radio tuner.
c) Frequency Turning "UP (ֱ)", "DOWN (ֳ)”: Tune in the desired frequency with the tuning
switch of the radio tuner.
(g) Regulate the VOLUME watching the pointer of the output meter to obtain desired sound volume.
(h) After completion of the above operation, set the "SPEAKER SELECTOR" to the desired
position.
B. In case that the radio tuner is not built in Even if the radio tuner is not built in, by connection of radio
output to the EXT terminal, the broadcasting of radio program becomes possible with operation
similar to above.

MARINE RADIO CO., LTD.
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Date : 2010.12.18 Doc. : MPA-2000_Eng(Rev. 1.0)
(QAS-ADD-008/0/09.09.25) manual\pa\MPA-2000\MPA-2000.doc (MARINE RADIO CO., LTD.)
MRC
3.5 Radio, CD-Player Unit(Option)
-1. Volume +/- Button: Volume Adjust (+: Up, -: Down)
-2. MODE Button: Radio Frequency Band Select (AM1 --> AM2 --> FM1 --> FM2 --> FM3)
-3. SCR (Source) Button: Radio Tuner/CD-Player Selection Button
-4. SEL (Select): Time Setup and Adjusting Sound [BAS (Bass), TRE (Treble), BAL (Balance),
FAD(FrontandRear)]
-5. Information Display Window.
-6. MBP (My Best sound Position) Button: Normally uselessness at the system.
-7. D (D-BASS) Button: You can select a clear powerful bass sound
(D-BASS-1 --> D-BASS-2 --> D-BASS-3 --> None --> D-BASS-1)
-8. Ejection () Button of CD-Player
-9. Reset Button: Pressing the reset button will erase the clock setting and some stored contents.
-10. ATT (Attenuate) Button: Quickly attenuating the sound.
-11. SENS Button: Only the stations with relatively strong signal will be tuned in.
-12. Number Button: Receiving the stored station (radio frequency). Press the number button(①to ⑥)
on which the desired station is stored.
a) REP (Repeat Play): The current track will repeat itself when it reaches the end.
b) SHUF (Shuffle Play): Play tracks in random order; you can select to play tracks on the current
disc in random order.
-13. Frequency Select Switch (Located on the bottom of the unit): FM/AM --> 10k/200k (9k/50k)
-14. BTM (Best Tuning Mode) Button: Press "BTM" for 2 seconds. And then, the unit stores stations in
the order of their frequencies on the number button automatically.
-15. DSPL (Display mode change): Press "DSPL" button for 2-seconds, then you can adjust the time.
The clock uses a 12-hour digital indication. Displayable items: Clock/Frequency.
-16. OFF Button: Stop the playback/System off
-17. SEEK/AMS +/- Button: a) CD Mode --> Skip tracks or fast forward/reverse playback.
b)Radio Mode --> Radio frequency selection or searching

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주/선박무선 Subject : Public Address System Page : (10 / 24)
Date : 2010.12.18 Doc. : MPA-2000_Eng(Rev. 1.0)
(QAS-ADD-008/0/09.09.25) manual\pa\MPA-2000\MPA-2000.doc (MARINE RADIO CO., LTD.)
MRC
3.6 Interfaces with Emergency General Alarm Generator
3.6.1 Interface for Communication between E, G/A and P/A
①E, G/A switch(Triggered and Turned off.)
②E, G/A bell, buzzer, P/A speaker or others(7-short and 1-long tones)
③P/A STOP signal: Supply a dry contact signal from the E, G/A equipment to the P/A.
④Navigation bridge microphone on/off button
⑤E, G/A STOP signal: This dry contact signal is sent from the P/A to the E, G/A.
⑥P/A equipment speakers
* Notes *
-1. Public addressing (Emergency announce) is possible during the operation of the E, G/A.
-2. A press of the navigation bridge microphone on/off button during the operation of the E, G/A
equipment sets the public addressing mode automatically.(Public addressing is protected against
unauthorized use.)
-3. A press of the navigation bridge microphone on/off button during the operation of the E, G/A
equipment changes the mode to public addressing automatically, irrespective of the speaker select
switch status.
-4. During the use of the navigation bridge microphone (button on), a press of the E, G/A switch
activate the E, G/A equipment. To change the speaker mode to public addressing, release the
microphone button and then press the button once again.
-5. Leave P/A STOP signal ③supplying, even while the E, G/A equipment is deactivated by the
occurrence of E, G/A STOP signal ⑤.
-6. Supply P/A STOP signal ③from the E, G/A equipment to the P/A equipment. Supply E, G/A STOP
signal ⑤from the P/A equipment to the E, G/A equipment.
-7. The current rating of the dry contact should be more than 1A (ampere).
3.7 Priority of Broadcasting
The system is operated of priority as shown in the speaker operation table.
-1. 1st: Emergency speech and from control panel in wheelhouse overriding general/fire/various alarm.
(Speaker selector any position, only P/A stop signal input time)
-2. 2nd: Emergency General Alarm (External Input)
-3. 3rd: Public addressing from control panel in main unit.
-4. 4th: Talk-Back
-5. 5th: Auto-telephone paging “0“
-6. 6th: Radio, cassette, CD addressing from control panel in main unit.
-7. 7th: External Audio Input

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Date : 2010.12.18 Doc. : MPA-2000_Eng(Rev. 1.0)
(QAS-ADD-008/0/09.09.25) manual\pa\MPA-2000\MPA-2000.doc (MARINE RADIO CO., LTD.)
MRC
3.8 P/A Remote Controllers
-1. POWER: "ON" and "OFF" Switch of Remote Controller.
-2. DIMMER: This switch controls brightness of power switch, busy lamp and LED of "SPEAKER
SELECTOR".
-3. CALL: When the button is pushed, then alarm oscillator is activated. The alarm signal is 800Hz.
-4. BUSY: Broadcasting Indicator.
-5. U/V Meter: That is displayed output power.
-6. MIC: Micro-Phone Jack
-7. SPEAKER SELECTOR: This switch selects operation of the speaker. And you can select up the
number of switch from 6 to 8 according to circumstances.
-8. MONI VOL: The potentiometer controls of volume for monitor speaker
-9. Monitor Speaker
-10. MIC VOL (Micro-Phone Volume): This potentiometer regulates input volume of the microphone of
main unit. (Usually it shall be set to around the middle)

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Date : 2010.12.18 Doc. : MPA-2000_Eng(Rev. 1.0)
(QAS-ADD-008/0/09.09.25) manual\pa\MPA-2000\MPA-2000.doc (MARINE RADIO CO., LTD.)
MRC
3.9 System Diagram
3.9.1 Inter-connection Diagram

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Date : 2010.12.18 Doc. : MPA-2000_Eng(Rev. 1.0)
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MRC
3.9.2 Signal Sequence and Diagram
No Name Function Sig. Direction Signal Type etc
1 P/A STOP Working of P/A is stopped when G/A activate the
contact, except working of W/H microphone. P/A <- E,G/A Dry Contact(A)
2 G/A STOP Momentary stop G/A when optional microphone
keying. P/A -> E,G/A Dry Contact(A, B)
* If P/A stop signal is received from general emergency alarm generator at standby state, the beat sound
is generated by P/A speaker. The function is used for warning signal by P/A speaker in E A/G working
time. If you don't need the function, then move the JP2 pin to "OFF" main control unit.
- Abbreviations -
1. E, G/A: Emergency General Alarm Generator 2. G/A: General Alarm Generator
3. P/A: Public Address System 4. W/H: Wheel House
3.10 Interfaces with External Audio Input
3.10.1 Signal Sequence and
Diagram
3.11 Broadcasting with Telephone
Paging can be performed from the automatic exchange telephone by dialing a specific number through
all speakers in accommodations area, engine room, and deck area and so on. In the public address
system, there are 9 terminals
as follow.
-1. Lines L1, L2 are voice
signal input, A1(Group 1),
A2(group 2) and A3(all
paging) operate speakers of
public address system.
-2. If owner of vessel request
group paging, then you can
the paging(Dial 8, 9, 0).
(The function is only product of MRC (Marine Radio Company).
-3. Lines B1, B2 are busy return signal from P/A to auto-exchanger.

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Date : 2010.12.18 Doc. : MPA-2000_Eng(Rev. 1.0)
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MRC
4. Maintenance and Trouble Shooting
The life of the equipment depends greatly on good maintenance. To prevent aggravation of eventual
failure, it is recommended to check the equipment periodically.
To prevent electrocution and short-circuit in circuitry, the main source switch of the main unit must be
turned off to check.
(1) Cleaning: Cleaning accessible parts with cloth as soft as possible and clean or with brush free from oil
to remove dust.
(2) Inspection of Components: Inspect carefully in detail to find any abnormality of components, rust of
load wires, soldering condition, corrosion of copper foil of printed circuit boards.
(3) Voltage check: Check always voltage on divers points in circuitry to detect any abnormal phenomenon
as early as possible.
4.1 Power Source
4.1.1 Power Source General Check
Symptom Inspection Point Check and Repair
Power
Failure
Power Line Short Check a power line short.
Terminal Contact is bad Try to confirm of terminal contact.
Fuse Open Check the fuse holder.
Rectifier Failure Check a input and output of rectifier using tester.
Power Regulator Failure Check the input and output of 7812, 7805 using tester.
4.1.2 Voltage Check Point
Unit Check Point Pin No. Voltage Etc
Main
Control
(P22048D)
IC20(7812) Input 1(In) - 2(GND) DC +24V
Output 3(Out) - 2(GND) DC +12V
IC21(7805) Input 1(In) - 2(GND) DC +21V
Output 3(Out) - 2(GND) DC + 5V
Pwr Amp.
(P22040C) IC1(7824) Input 1(In) - 2(GND) DC +32V Standby Operating
DC +24V
Output 3(Out) - 2(GND) DC +24V
Pwr Amp.
(P22037) TR7(D2060) Emitter E(Out) - GND DC +22V
Radio
Tape
(P22093E)
DD1(ZUS15) Output 1 +V(Out) - GND DC +12V
Output 2 -V(Out) - GND DC 0V
TR1(D600) Collector C(OC) - 2(GND) DC +24V
Base B(In) - 2(GND) DC + 5V
D1(3A) Cathode C(Out) - GND DC +24V
Remote
Control
(P22043D)
(P22043E)
IC1(7805) Input 1(In) - 2(GND) DC +12V
Output 3(In) - 2(GND) DC + 5V
IC2(7812) Input 1(In) - 2(GND) DC +24V
Output 3(In) - 2(GND) DC +12V
TR2(D600) Emitter E(Out) - GND DC +2V ～+10V Dimmer

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Date : 2010.12.18 Doc. : MPA-2000_Eng(Rev. 1.0)
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MRC
4.2 Speaker
Symptom Inspection Point Check and Repair
Output of
Speaker
Failure
Power Transformer bad Check the 10Ω, 12Ωof output transformer.
Terminal Contact is bad Try to confirm of sp3, 1, 2 of terminal board.
Speaker Line Failure Check the opened or changed of speaker line.
Speaker Failure Check a transformer inside speaker.
(Red)
(White)
(Black)
-1. In normal announce state, the click tone is generated as connection (No.1 & No.3) using analog
tester. In this case, the volume is controlled by operator. The switch's position is "OFF", and then
there is no click tone.
-2. In emergency announce state, the click tone is generated as connection (No.2 & No.3) using analog
tester. Even if the switch's position is "OFF", there is maximum click tone.
4.2.1 Method of Speaker Testing Table
No. broadcasting Output Point Volume Position(Impedance : Ω) etc
Off 1 2 3
1 Normal 1, 3 Line ∞540 150 0
2 Emergency 2, 3 Line 0 180 118 0
4.2.2 Selection of Fuse in Speaker
No. Output(Watt) Real Current Rated Fuse etc
1 1 W 0.025 A 0.5 A
2 2 W 0.050 A 0.5 A
3 3 W 0.075 A 0.5 A
4 5 W 0.125 A 0.5 A
5 10 W 0.250 A 0.5 A
6 15 W 0.375 A 1 A
7 20 W 0.500 A 1 A
8 30 W 0.750 A 2 A
9 50 W 1.250 A 2.5 A
10 75 W 1.875 A 3 A

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Date : 2010.12.18 Doc. : MPA-2000_Eng(Rev. 1.0)
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MRC
4.3 Remote Controller
Symptom Inspection Point Check and Repair
Remote
Microphone
Failure
Line inside Mic. Failure Check the open line inside microphone.
Contact of case
connector is bad Try to confirm of contact of case connector
Microphone line of remote
contact is bad or opened Check the opened or changed of Mic. line. 1,2 --> Mic. Input, 3 --> Earth, 4,5 --> Key Input
Remote(A)power
Failure Connection or contact power line in remote is bad. Check the power line in remote controller. Detail content makes reference to attached drawing.
Remote(B)
Power Failure Connection or contact power line in remote is bad. Check the power line and other in remote controller. Detail content make reference to attached drawing.
Remote(A)
Speaker Failure
Connection or contact
speaker line in remote
is bad.
Check the speaker line in remote controller.
Ref) for Speaker
Compass Speaker, Wing Speaker(PORT, STBD)
4.4 Microphone
Symptom Inspection Point Check and Repair
Microphone
Failure
Line inside microphone Check the line inside microphone.
Contact of terminal Try to confirm of terminal board
board is bad 1,2 --> Mic Input, 3 --> Earth, 4,5 --> Key Input
4.4.1 Connection between terminal board and microphone connector.
NO. Terminal Board Microphone Connector Function
1 1 1 Mic 1
2 2 2 Mic 2
3 3 3 Ground
4 4 4 Key 1
5 5 5 Key 2
4.4.2 Testing of Microphone
-1. Key: When you take the measure of resistor between key terminal using testers, then the value is
changed from "∞" to "0" as click the key.
-2. Microphone: When you take the measure of resistor between microphone terminals using tester,
then the value is approximately displayed to 150 Ω.

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Date : 2010.12.18 Doc. : MPA-2000_Eng(Rev. 1.0)
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MRC
4.5 Pre and Main-amplifier
4.5.1 Pre-amplifier:
①If output of alarm is low, then you can control the "VR1".
②However you must not excess red line of "V/U" meter.
4.5.2 Main-amplifier:
①The bios voltage of output transistor --> 0.45V ～0.50V
(That is adjusted as delivery of goods from manufacture. Therefore you should not intentionally
modify.)
②And you must not change the last power output of main amplifier unit.
4.5.3 VU Meter in Main-amplifier:
Low & High Level of VU Meter
Normal Condition: Press the alarm button on main control unit, then output level indicates 100 %( 0)①
value.
②Overload & Weak Signal Condition: In the above working time, the level is 30-50 %( 10 - 7) value.
4.6 Setup Method of Main Control PCB
4.6.1 Priority Selection between W/H controller and main unit.
If the W/H remote controller is not adopted, main unit is assigned to the highest rank using the jumper.

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MRC
Jumper Function Main Microphone Jumper the highest rank Mic. Etc
1st 3rd
Main Unit Only O Main Unit Mic.
with W/H Controller O W/H Controller Mic.
Jumper setup of main control PCB
4.6.2 Setup microphones stop of Emergency Alarm Generator.
In the alarm generator is working time, microphones selected by "AL MUTE" diode is pressed the button,
then "AL STOP" signal works contact of the relay.
Position
Number Microphone Position Etc
M 1 Remote 2(W/H) Mic. W/H
M 2 Remote 2 Mic.
M 3 Mic. 3
Main Main Mic. Main
4.6.3 Setup microphones of talk-back group
1. REMO.1 --> Remote Controller No.1 Microphone (W/H)
2. REMO.2 --> Remote Controller No.2 Microphone (CCR, ECR)
3. MAIN --> Main Unit Microphone Position
Number Example Mic. Position Etc
M 3 Life Boat Mic.
M 4 CCR's Mic.
M 5 Bow's Mic.
M 6 Aft's Mic.
M 7 ECR's Mic.
M 8 SGR's Mic.
The "E" line is key enable jumper (Diode) regardless of diode matrix.
Example
-1. Group 1: Talk Back (W/H, Bow & Aft): Select 2 of Remote 1 - M3 - M4 --> Insert diode in matrix.
-2. Group 2: W/H, E/C Room, and S/G Room: Select 3 of Remote 2 - M5 - M6 --> Insert diode in matrix.
-3. Group 3: The operator can use the Group 3 by above method.
* Cautions: The user must be setup of speaker control diode matrix according to condition.

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Date : 2010.12.18 Doc. : MPA-2000_Eng(Rev. 1.0)
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MRC
4.6.4 Setup of Speaker Control Diode Matrix.
-1. Matrix Function
No. Paging Function Etc
EM‘CY Speaker Selector Em'cy
Broadcasting
TEL1 Telephone Paging "8"
TEL2 Telephone Paging "9"
TEL3 Telephone Paging "0"
MIC3 Mic. 3 Broadcasting
MIC4 Mic. 4 Broadcasting
SP SEL1 Speaker Selector 1 of
Main/Remotes
SP SEL7 Speaker Selector 7 of
Main/Remotes
SP1 Speaker 1
SP2 Speaker 2
SP15 Speaker 15
SP EM Speaker Emergency
Broadcasting
-1. Emergency: Speaker Selector of Main/Remote Controller
-2. SP EM: Maximum Output of Speaker (Cabin, Passage & E/C Room Etc)
4.6.5 Setup of Speaker Selector PCB Jumper
-1. PRESET: At power source initializing time, the jumper can preset of speaker selector LED. The left
LED is No. 1's and right LED is No. 6/7/8's.
EM,CY : Left LED Preset.
OFF : Right LED Preset.