INSTALLATION & SERVICE MANUAL
VPA PUBLIC ADDRESS AMPLIFIERS
VPA-120 / 240 / 400
A100K10876
Page 1: ...INSTALLATION SERVICE MANUAL VPA PUBLIC ADDRESS AMPLIFIERS VPA 120 240 400 A100K10876 ...
Page 2: ...3 2 Mains power 7 3 3 3 Grounding 7 3 3 4 Input connection 8 3 3 5 Loudspeaker connection 8 3 3 6 Optional connections 9 4 STARTUP AND OPERATION 10 4 1 System check out 10 4 1 1 Preparations 10 4 1 2 Sound 10 4 1 3 Speaker line fault detection 11 5 SERVICE 12 5 1 Service information 12 5 2 Troubleshooting 12 5 3 Fuse replacement 13 5 3 1 Mains and low voltage protection 13 5 3 2 24 V out protectio...
Page 3: ...must be changed See section 3 3 4 1 3 Rules and regulations The VPA system and its components have been tested according to the following regulations z EN 60065 2002 Audio video and similar electronic apparatus Safety requirements z IEC 60533 Second edition 1999 Electrical and electronic installation in ships Electromagnetic compatibility z EN 60945 Fourth edition 2002 Maritime navigation and radi...
Page 4: ... amplifiers are powered from 230 or 115 VAC mains or 24 VDC The mains voltage is set inside the amplifier default setting is 230 V There is a mains circuit breaker on the cabinet front and a mains fuse in conjunction with the mains inlet The fuse value depends on the amplifier type 24 VDC can be used as a backup source in case of mains power failure The 24 V backup is not turned off by the mains s...
Page 5: ...sic z Monitor Loudspeaker 1 W power output to an 8 Ohm loudspeaker normally mounted close to the amplifier to monitor entertainment and call channels The output has a separate volume control 2 6 Optional connections z Fault Relay NO NC contacts of a built in relay is available for remote warning devices The relay is activated during fault conditions such as mains power failure or open or shorted s...
Page 6: ...o observe the above precautions could result in overheating that could damage the equipment or create a fire hazard See also the data sheet for each amplifier 3 3 Wiring 3 3 1 Cable requirement marine installations All electrical wiring external to the equipment shall be approved ship cable of type 0 75 mm2 twisted pair with outer braided copper screen The cable should at least be a flame retardan...
Page 7: ...pe fuses to prevent unauthorized manual operation z The mains power cable must be 3 x 2 5 mm2 rated for 500 VAC z The 24 VDC power cable dimension has to be calculated depending on the total low voltage power consumption and cable length z Proper grounding is essential for reliable operation Note The VPA unit has to be connected to the vessel s central ground 115 VAC mains z Be sure the amplifier ...
Page 8: ...ker impedance adds up to 8 Ohm It is important to select speakers capable of handling the actual power Example Output power 120 W 6 speakers of 15 W 1 speaker of 30 W Loop A 4 x 4 Ohm 16 Ohm 120 W 2 60 W Loop B 8 Ohm 16 16 Ohm 16 Ohm 120 W 2 60 W Loop A B 16 16 Ohm 8 Ohm Constant voltage lines The 100 V connectors for CALL BGM and CALL ONLY should be used when a large number of speakers are instal...
Page 9: ...DC and consumes less than 800 mA This output is protected by a 1 A thermistor Note the polarity if the device is polarity dependant Remote volume control Mount an optional 22 kOhm log potentiometer in a convenient place in order to adjust the master PA volume Use a shielded cable to connect the volume control to the REMOTE terminals The center tap on the pot is connected to the rightmost terminal ...
Page 10: ...ntrol is connected turn it CCW to check it function Turn it fully CW before proceeding z If a monitor speaker is mounted turn its volume control CW to check the sound in the monitor Call check The PA amplifier has an automatic VOX control which means that if a signal on the CALL input exceeds ca 300 mV the signal on BGM will be muted If the signal is less the call signal will be mixed with BGM z S...
Page 11: ...t any signal source the pilot tone level may need adjustment z Set all volume controls to their final levels z Turn the power OFF and remove the cabinet cover z Reconnect the power and locate the trimming pot on the AMP 2 board No external signal must be applied to the amplifier z Turn the pot CW until the first green LED 18 dB is lit Observe that the FAULT LED is off z Turn the pot slowly back CC...
Page 12: ...his will indicate whether the source or the input channel is faulty A pulsating noise in the loudspeakers A motorboat like sound during music and or announcements The Overload lamp may light or flash z The sound level is too high attempting the output to exceed its limit Reduce the master volume control until the motorboating disappears Reducing the BASS control may also solve the problem Be sure ...
Page 13: ...ontact qualified service personnel FUSE MAINS VPA 120 VPA 240 VPA 400 115 V 5 A 5x20 mm 10 A 5x20 mm 20 A 5x20 mm F101 230 V 2 5 A 5x20 mm 6 3 A 5x20 mm 10 A 5x20 mm F501 24 115 230 V 15 A x 1 20 A x 1 40 A x 1 All fuses are glass 250 V fast blow 5 3 2 24 V out protection A thermistor F401 limits the current to 1 A at the 24 V out terminals This fuse should not be changed it will reset when the ex...
Page 14: ...W RMS 24 VDC 96 W 172 W 324 W Output power max Alarm power 1 kHz 30 55O C Monitor 1 W Call 100 V Call BMG 8 Ohm and 100 V Monitor 8 Ohm Load resistance 100V 80 Ohm 42 Ohm 25 Ohm Harmonic distortion 1 at 1 kHz at rated power Loudspeaker outputs Signal to noise ratio 75 dB 5 dB Voltage output 24 VDC 800 mA Signal level 0 5 1 5 Vrms Line output Impedance 47 kOhm balanced Sensitivity 0 5 1 5 Vrms Impe...
Page 15: ...A100K10876 Installation and Service Manual Page 15 VPA Amplifiers 6 APENDIX 6 1 Block diagram STENTOFON VPA 120 240 400 BLOCK ...
Page 16: ...Page 16 Installation and Service Manual A100K10876 VPA Amplifiers 6 2 Schematic diagram Amplifier ...
Page 17: ...A100K10876 Installation and Service Manual Page 17 VPA Amplifiers 6 3 Schematic diagram Booster ...
Page 18: ...Page 18 Installation and Service Manual A100K10876 VPA Amplifiers 6 4 Component numbers Amplifier ...
Page 19: ...A100K10876 Installation and Service Manual Page 19 VPA Amplifiers 6 5 Component values Amplifier ...
Page 20: ...Page 20 Installation and Service Manual A100K10876 VPA Amplifiers 6 6 Component numbers Booster ...
Page 21: ...A100K10876 Installation and Service Manual Page 21 VPA Amplifiers 6 7 Component values Booster ...
Page 22: ... The company s Quality Assurance System is certified to meet the requirements in NS EN ISO 9001 2008 Zenitel Norway AS reserves the right to modify designs and alter specifications without prior notice in pursuance of a policy of continuous improvement 2010 Zenitel Norway AS support vingtor com DOC NO A100K10876 ...
