TOA Electronics DA-250F CU Stereo Amplifier User Manual
Contents
1. 101 U09 1eduinf 44 lopejeg VOUS HO yms Y HO 8 LNdLNO 08 JdO NO 3998 HO HO Jeynur jueun2 pus o 3 E as T ojd tot oj H p OL aP r VLNdLNO 1eduunf LAdNI t HO 1 LNdLNO ee uonoe1oJd 1eduinf JJO NO E JdH EN 10 9ejeq HOUS PO oyu 1ueuna Rs T S RS o 3 p o 2 L i dg un 01 8 r o H E 104100 Jeduunf uonoejes LAdLNO hock 2 I 101 U09 U0ll99101q 44 ar 2 HO youms M Joj ejeq uo 10100 20199190 ANS 2106 3300 ZHO JUANG pins Hii Q O Oo Lo e o o S us gp 9 H LNdLNO Jeduunf uonoejes LAdNI Z HO j Li 5 HO LNdLNO iu L 3ediug E ynoir uono loid jedun 440 NO i OR _ EE HO bod 10 09 8q 5 L HO B ZH 08 4 gt OE o 3 4 9 104100 L HO LAdNI HO 17 18 152. Finish Front panel Aluminum alumite process black Dimensions 482 w x 44 h x 400 d mm Weight 0 dB 0 775 Vrms 6 6 kg Note The design and specifications are subject to change without notice for improvement Accessories Power cord 2 m Removable terminal plug 4 Volume control cap 19 E Printed in J AM Corporation 138 52 057 00
3. ON BRIDGE 1 BRIDGE 2 ON CH 1 mode OFF BRIDGE 1 BRIDGE 2 CH 1 mode Setting BRIDGE 1 BRIDGE 2 CH 1 mode Setting BRIDGE 1 BRIDGE 2 CH 1 mode Setting BRIDGE 1 BRIDGE 2 CH 1 mode Speaker output terminals SISSE BRIDGE 2 DA 250FH 39 2 9 39 2 9 DA 250FH 39 2 0 39 2 Q Speaker output terminals CH2 CH1 o 6 O6 9 992 996 DA 250F DA 250FH BRIDGE20 4 80 1960 1960 3920 Speaker output terminals CH4 CH3 Oo 6 O66 DA 250FH 39 2 0 19 6 0 E 19 6 Q Speaker output terminals CH2 CH1 o 60960 OOOO DA 250F DA 250FH BRIDGE2O 4 80 1960 1960 39 2 0 11 1 input 3 outputs 2 Speaker output terminals CH4 CH3 Setting o 6 O6 BRIDGE 1 aa BRIDGE 2 CH 1 mode BRIDGE 1 DA 250F DA 250FH 8 16 0 39 2 0 19 6 Q 19 6 Q 9 REMOVABLE TERMINAL PLUG CONNECTION Cautions Be sure to use shielded cables for audio signal lines Avoid so
4. 250 a Aes 16 142 2 tede ie erit POR ee en Ut dye ver EUR 17 15 DIMENSIONAL DIAGRAM a eene 18 16 SPECIFICATIONS sedat te m Mtv 19 ACCeSSOLSGS ueteris dec 19 1 IMPORTANT SAFETY INSTRUCTIONS Read these instructions Keep these instructions Heed all warnings Follow all instructions Do not use this apparatus near water Clean only with dry cloth Do not block any ventilation openings Install in accordance with the manufacturer s instructions Do not install near any heat sources such as radiators heat registers stoves or other apparatus including amplifiers that produce heat Do not defeat the safety purpose of the polarized or grounding type plug A polarized plug has two blades with one wider than the other A grounding type plug has two blades and a third grounding prong The wide blade or the third prong are provided for your safety If the provided plug does not fit into your outlet consult an electrician for replacement of the obsolete outlet Protect the power cord from being walked on or pinched particularly at plugs convenience receptacles and the point where they exit from the apparatus Only use attachments accessories specified by the manufacturer Use only with the cart stand tripod bracket or table specified by the manufacturer or sold with the apparatus When a cart is used use caution when m
5. 1 gp 0l Y HO Yyoums LNdLNO Jojoeje HOUS U9IIMS 44 ADCIYa IIe o L HO T 2 MT i i Em 1 10 E od 2 9 01 8 INdLNO Jeduunf uonoejes LAdNI 7 HO H i M 9 751 3odiug P 10 4 01 oat m jenurueuno il O I Lo eH a i gp 0 8 uono l s z HO AE NOD 01 PO av 104100 Jojoeje HOUS U9IIMS 44 39GdluH8 2 me 1 jed 5 OL aP i leindino Jeduunf uonoejes HO 10100 A yAnIsues HO L a eunpA e A 2009190 VOUS IH PUNO Lio Qo L o lt i 1 1 104100 LAdNI HO L HO 16 14 2 DA 250FH 01 r Jeduunf p HO
6. DIMENSIONAL DIAGRAM Unit mm TM SURE Gm 8 4 A e st S Y MTS EM 271 UC 16 SPECIFICATIONS Mod _____ ______ DA250FHCU Power Source 120 V AC 50 60 Hz Power Consumption 200 W at 1 8 rated output x 4 channels Output 4 channels 250 W x 4 4 Q 4 channels 250 W x 4 19 6 Q 170 W x 4 8 Q 2 channels bridge connection 2 channels bridge connection 500 W x 2 39 2 Q 500 W 2 8 Q Frequency Response 20 Hz 20 kHz 41 dB 50 Hz 20 kHz 3 dB 0 dB HPF ON 20 Hz 20 kHz 1 dB HPF OFF Total Harmonic Distortion 0 1596 1 kHz 0 396 20 Hz 20 kHz 0 1596 1 kHz 0 396 100 Hz 20 kHz HPF ON 0 396 20 Hz 20 kHz HPF OFF Input Sensitivity 4 dB 1 23 V 10 0 24 selectable with the inner jumper Input Impedance 10 electronically balanced S N Ratio 100 dB Connection Terminal Input CH 1 4 Removable terminal block Output screw terminal Power input AC inlet Indicator Power indicator x 1 blue Input indicator x 4 green Output indicator x 4 yellow Peak indicator x 4 red Protection indicator x 4 red Operating Temperature 10 to 40 C Humidity 90 96 or less no dew condensation must be formed
7. ON OFF button setting 4 channel input mode Set both BRIDGE 1 and 2 buttons to OFF 10 11 Set either BRIDGE1 or 2 to ON When bridge connecting Channels 1 and 2 set BRIDGE1 to ON and BRIDGE 2 to ON when bridge connecting Channels 3 and 4 2 channel input mode Set both BRIDGE1 and 2 to ON Note Be sure to first turn off the power switch when changing the BRIDGE button settings CH1 mode ON OFF button CH 1 TO ALL ON B OFF Setting this button to ON pressed in transmits the Channel 1 input signal to all channels Output signal levels can be individually adjusted with each channel s input volume control 3 Note Be sure to first turn off the power switch when changing the CH 1 mode button settings Input terminals INPUTS Electronically balanced inputs of 3P removable terminal block type H Hot C Cold E Earth 8 CONNECTIONS 8 1 Procedure Step 1 Switch off the unit s power BRIDGE 2 BRIDGE 1 ON OFF button ON OFF button Step 2 Set the BRIDGE ON OFF buttons and CH 1 mode ON OFF button CH 4 BRIDGE 2 HCE HCE 255 eo oj am ON OFF ON OFF INPUTS Step 3 Connect the sound source equipment to the Input terminals Note Refer to p 12 for the removable terminal plug connection CH 1 mode ON OFF button Step 4 Connect speakers to the Speaker output terminals 4 1 Unscrew the output terminal cover 4 2 Strip 10 mm of insul
8. 4 5 mm reference size 7 NOMENCLATURE AND FUNCTIONS Front CH 3 BRIDGE 2 pr Power switch OFF Power is switched on and off with each depression of this switch Power indicator POWER Lights blue when the power is switched on Input volume controls CH 1 BRIDGE 1 CH 2 CH 3 BRIDGE 2 CH 4 Adjust the input volume of each channel When a bridge connection is made When Channels 1 and 2 are bridge connected BRIDGE 1 ON OFF button 9 is set to ON the CH 1 BRIDGE 1 volume control adjusts the input volumes of Channels 1 and 2 In this event the CH 2 volume control cannot be used When Channels 3 and 4 are bridge connected BRIDGE 2 ON OFF button 9 is set to ON the CH 3 BRIDGE 2 control adjusts the input volumes of Channels 3 and 4 In this event the CH 4 volume control cannot be used Note The figure shows the DA 250F 4 Ventilation panel Air Vent A filter is located inside the ventilation panel To clean the filter remove the ventilation panel See p 15 Cleaning the Filter Indicators INPUT OUTPUT PEAK PROTECT The indicators are as follows from left to right Input indicator INPUT Lights green regardless of the input volume control setting when an input signal level exceeds about 20 dB Output indicator OUTPUT Lights yellow when an output level exceeds about 1W at an 8 0 load DA 250F or 19 6 load DA 250FH Pea
9. Za 74 OPERATING INSTRUCTIONS MULTICHANNEL POWER AMPLIFIERS DA 250F CU DA 250FH CU N Note The figure shows the DA 250F 2 Thank you purchasing TOA s Multichannel Power Amplifier Please carefully follow the instructions in this manual to ensure long trouble free use of your equipment Corporation TABLE OF CONTENTS 1 IMPORTANT SAFETY INSTRUCTIONS 3 2 SAFETY PRECAUTIONS 4 3 GENERAL DESCRIPTION 6 4 FEATURES tea 6 5 HANDLING PRECAUTIONS 6 6 INSTALLATION PRECAUTIONS 7 7 NOMENCLATURE AND FUNCTIONS ELTE 8 RM PU 9 8 CONNECTIONS 8 T sinere en 10 8 2 Button Settings and Speaker Connections 10 9 REMOVABLE TERMINAL PLUG CONNECTION 12 10 INPUT SENSITIVITY AND HIGH PASS FILTER ON OFF SETTINGS 211 11 13 11 PROTECTION OPERATION LIST 14 12 VOLUME CONTROL CAP ATTACHMENT _ 14 13 CLEANING THE FILTER 15 14 BLOCK DIAGRAMS 4 1 5
10. age higher than that which is specified may result in fire or electric shock Do not cut kink otherwise damage nor modify the power supply cord In addition avoid using the power cord in close proximity to heaters and never place heavy objects including the unit itself on the power cord as doing so may result in fire or electric shock Be sure to replace the unit s terminal cover after connection completion Because the voltage of up to 140 V is applied to the high impedance speaker terminals never touch these terminals to avoid electric shock External wiring connected to the terminals marked with 1 requires installation by an instructed person The apparatus shall be connected to a mains Socket outlet with a protective earthing connection When the Unit is in Use Should the following irregularity be found during use immediately switch off the power disconnect the power supply plug from the AC outlet and contact your nearest TOA dealer Make no further attempt to operate the unit in this condition as this may cause fire or electric shock If you detect smoke or a strange smell coming from the unit If water or any metallic object gets into the unit If the unit falls or the unit case breaks If the power supply cord is damaged exposure of the core disconnection etc If it is malfunctioning no tone sounds To prevent a fire or electric shock never open nor remove the unit case as the
11. ative jacket from the end of the 1 speaker cable as shown in the figure at right 4 3 Connect speaker cables to the output terminals 10 mm 4 4 Replace the output terminal cover in place Be sure to replace the unit s terminal cover after connection AN WARN NG completion Because high voltage is generated at the speaker output terminals never touch these terminals to avoid electric shock 8 2 Button Settings and Speaker Connections 4 inputs 4 outputs Speaker output terminals CH4 CH3 CH2 CH1 CHI e e e e e e 27 Q BRIDGE 1 O DA 250F DA 250FH CH2 BRIDGE 2 3 CH2 gf d CH 1 mode 4 80 19 6 0 CH3 CH3 AF d 4 8Q 19 6 Q CH4 eH A 11 4 80 19 6 Q Koa t ns E 1 4 80 1960 1 input 4 outputs Speaker output terminals aii DN a ree CH4 CH3 CH2 e 6666 e Eg BRIDGE 1 DA 250F 250 BRIDGE 2 2 0 4 80 1960 2 0 1960 1960 EE Ntc 19 6 Q 2 inputs 2 outputs CH1 CH3 ex IU VUL
12. eform or discolor the unit 6 INSTALLATION PRECAUTIONS The supplied power supply cord is designed for exclusive use with this unit Never use it with other equipment When mounting the unit in an equipment rack the inside of the rack must be sufficiently ventilated To achieve sufficient ventilation remove all panels on the rear of the rack e When mounting the unit in the rack also mount a Perforated Panel larger than 10 in size 1 at the top and the bottom of the rack and 2 above and below every 5 units Power amplifiers DA 250F 250FH Power amplifiers DA 250F 250FH Perforated panel Robust structure is one of the unit s main features However if the strength is particularly needed when installing the unit in the rack use a supporting runner for the safety purposes Rack mounting screws are not supplied with the unit Be sure to use the screws with a diameter of over 5 mm and length of over 12 mm to mount the unit 1U size 4
13. enerating sooty smoke or steam as doing otherwise may result in fire or electric shock To avoid electric shocks be sure to switch off the unit s power when connecting speakers The DA 250F and DA 250FH are designed exclusively to be mounted in an equipment rack Be sure to follow the instructions below when rack mounting the unit Failure to do so may cause a fire or personal injury Install the equipment rack on a stable hard floor Fix it with anchor bolts or take other arrangements to prevent it from falling down Be sure to use the screws with a diameter of over 5 mm and length of over 12 mm to mount the unit When connecting the unit s power cord to an AC outlet use the AC outlet with current capacity allowable to the unit When the Unit is in Use Make sure that all volume controls are set to minimum position before power is switched on Loud noise produced at high volume when power is switched on can impair hearing Do not operate the unit for an extended period of time with the sound distorting This is an indication of a malfunction which in turn can cause heat to generate and result in a fire Contact your TOA dealer as to the cleaning If dust is allowed to accumulate in the unit over a long period of time a fire or damage to the unit may result If dust accumulates on the power supply plug or in the wall AC outlet a fire may result Clean it periodically In addition insert the plug in the wall out
14. k indicator PEAK Lights red when an output signal clips distortion occurs Protection indicator PROTECT Lights red when the protection circuitry is activated See p 14 Protection Operation List When the power is switched on this indicator lights for about 2 seconds and then extinguishes Rear CN Ho HCE HCE HCE Cold Earth 2 CHIT ALL om 7 omte 60130 60420 608170 IGNAL 9 225 BRDGE2 CH1TOALL BROGE 1 or INPUTS 2 q Note The figure is common to DA 250F and DA 250FH 6 AC inlet 3 channel input mode Connect the supplied power cord to this inlet Functional ground terminal SIGNAL GND Hum noise may be generated when external equipment is connected to the unit Connecting this terminal to the functional ground terminal of the external equipment may reduce the hum noise Note This terminal is not for protective ground Speaker output terminals with a terminal cover Connect speaker cables to these terminals BRIDGE ON OFF buttons BRIDGE1 2 ON OFF Set these buttons to OFF protruding in normal operation When using the unit in bridge connection set either or both buttons to ON pressed in and change speaker terminal wiring See p 10 The unit s input mode changes as follows depending on the BRIDGE
15. ldering cable conductor as contact resistance may increase when the cable is tightened and the solder is crushed possibly resulting in an excessive rise in joint temperatures Use cables of AWG 12 24 Cable end treatment Shielded cable 7 mm 2 5 20 mm Connector connections Slotted screwdriver Step 1 Loosen the terminal screw then insert the cable 2 Tightens Loosens 1 Step 2 Retighten the terminal screw Pull on the cable to ensure it is securely connected Terminal screw Earth Removable terminal plug Cold Shielded cable Tip Recommended slotted screwdriver type Screwdriver with blade that is 3 mm in width Y Bit shape 7 12 10 INPUT SENSITIVITY AND HIGH PASS FILTER ON OFF SETTINGS The Input sensitivity can be set to 4 dB factory preset or 10 dB for each channel Besides only the DA 250FH employs the High pass filter on each channel which can be set to ON or OFF CAUTION These servicing instructions are for use by qualified personnel only To avoid electric shock do not perform any servicing other than that contained in the operating instructions unless you are qualified to do So Refer all servicing to qualified service personnel Step 1 Detach the top cover of the unit Step 2 Change the jumper socket position to 4 dB or 10 dB for the Input sensitivity and to ON or OFF for the High pass filter DA 250FH only as illustrated below High pa
16. let securely Switch off the power and unplug the power supply plug from the AC outlet for safety purposes when cleaning or leaving the unit unused for 10 days or more Doing otherwise may cause a fire or electric shock An all pole mains switch with a contact separation of at least 3 mm in each pole shall be incorporated in the electrical installation of the building The lighting flash with arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of uninsulated dangerous voltage within the product s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons 3 GENERAL DESCRIPTION TOA s DA 250F and DA 250FH Multichannel Power Amplifiers feature high power handling capabilities and durability The DA 250F is configured with 250 W x 4 channels 4 output and 170 W x 4 channels 8 Q output and the DA 250FH features 250 W x 4 channels 19 6 output configuration Besides each model s output is made available for bridge connection allowing it to be used as a stereo amplifier of 500 W 8 Q for DA 250F 39 2 Q for DA 250FH x 2 channels or a 3 channel amplifier of 500 W 8 Q 250 W 4 Q x 2 channels for DA 250F 500 W 39 2 250 W 19 6 Q x 2 channels for DA 250FH Their wide range of applications include stores and permanent sound systems 4 FEATURES e 10 rack mounting 5122 Low power consumption and light weight An input
17. nside the unit over 80 C Built in amplifier unit that caused the failure halted Four indicators of the corresponding channel extinguish Check the unit for correct ventilation and overload Operation automatically returns to normal when the temperature decreases Abnormal DC voltage output Load disconnected Protection indicator lights Contact the TOA dealer where the unit was purchased 12 VOLUME CONTROL CAP ATTACHMENT To protect the input volume control from accidental operation it is recommended to replace the control knob with the supplied volume control cap as illustrated Input volume control Volume control cap supplied 13 CLEANING THE FILTER Step 1 Switch off the unit s power Step 2 Remove the ventilation panel as shown in the figure Step 3 Detach the filter inside the ventilation panel Step 4 Clear the filter of dust Step 5 Replace the filter and ventilation panel Ventilation Panel Detach the panel by pressing on the left and right sides 3 Filter 15 14 BLOCK DIAGRAMS 14 1 DA 250F 01 9 r Jeduunf
18. oving the cart apparatus combination to avoid injury from tip over Unplug this apparatus during lightning storms or when unused for long periods of time Refer all servicing to qualified service personnel Servicing is required when the apparatus has been damaged in any way such as power supply cord or plug is damaged liquid has been spilled or objects have fallen into the apparatus the apparatus has been exposed to rain or moisture does not operate normally or has been dropped lt FCC REQUIREMENTS E Note This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual may cause harmful interference to radio communications Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense Reorient or relocate the receiving antenna the separation between the equipment and receiver Connect the equipment into an outlet on a circuit different from that to which the receiver is connected Consult the dealer or an experienced radio TV
19. re are high voltage components inside the unit Refer all servicing such as modification inside the unit to qualified service personnel Do not place cups bowls or other containers of liquid or metallic objects on top of the unit If they accidentally spill into the unit this may cause a fire or electric shock Do not insert nor drop metallic objects or flammable materials in the ventilation slots of the unit s cover as this may result in fire or electric shock Do not touch a plug during thunder and lightning as this may result in electric shock A CAUTION When Installing the Unit Never plug in nor remove the power supply plug with wet hands as doing so may cause electric shock When unplugging the power supply cord be sure to grasp the power supply plug never pull on the cord itself Operating the unit with a damaged power supply cord may cause a fire or electric shock When moving the unit be sure to remove its power supply cord from the wall outlet Moving the unit with the power cord connected to the outlet may cause damage to the power cord resulting in fire or electric shock When removing the power cord be sure to hold its plug to pull Do not block the ventilation panels on the front Doing so may cause heat to build up inside the unit and result in fire Avoid installing the unit in humid or dusty locations in locations exposed to the direct sunlight near the heaters or in locations g
20. signal to Channel 1 can be routed to all channels and the output volume adjusted using the input volume control for each channel Electronically balanced inputs Input terminals employ removable terminal blocks to provide maximum connection ease Input output status LED indicators for each channel Built in protection circuitry disconnects the output when a short circuit overload or unusual temperature rise occurs 1U size 44 5 mm reference size 5 HANDLING PRECAUTIONS Keep the input cable away from the output cable If installed close to each other oscillation could occur To avoid unit failures never connect outputs of two or more units in parallel Only connect speakers with an impedance equal to or greater than those specified Connecting speakers with a smaller than specified impedance could cause damage to the unit Periodically clean the filter located inside the ventilation panel on the unit s front panel If the filter becomes clogged heat will become trapped inside the enclosure e Install the unit in locations where the temperature is between 10 and 40 C and the moisture is less than 90 no dew condensation must be formed To clean be sure to first switch off the unit s power then wipe with a dry cloth When the unit gets very dirty use a cloth damped in a neutral cleanser Never use benzene thinner alcohol or chemically treated cleaning cloth because such volatile liquids could d
21. ss filter setting DA 250FH only When set to ON When set to OFF Jumper socket Jumper socket DA 250F 250FH 0 Viewed from top with the 0 top cover detached Front panel Input sensitivity setting When set to 4 dB When set to 10 dB Jumper socket Jumper socket m 2 8 5 5 9 5 10 dB 4 dB Input Sensitivity Factory preset Note To operate the unit in bridge connection perform the same setting for the channels to be used Channels 1 and 2 Channels 3 and 4 or all channels Operating the unit with the different setting may cause unit failure Step 3 Replace the detached top cover 13 14 11 PROTECTION OPERATION LIST Failure Overcurrent due to overload Protection Current limiter activated when impedance drops below the specified value Operation Indicator Peak indicator lights Remove overload Recovery Connecting a correct load automatically restores normal operation Short circuit Current limiter activated Load is disconnected Protection indicator lights Check speakers and lines for short circuit Turn off the power switch Correct the load then switch on the power Rise in heat sink temperature over 110 C Load disconnected Protection indicator lights Temperature rise i
22. technician for help This Class A digital apparatus complies with Canadian ICES 003 Cet appareil num rique de la classe A est conforme la norme NMB 003 du Canada 2 SAFETY PRECAUTIONS Before installation or use be sure to carefully read all the instructions in this section for correct and safe operation Be sure to follow all the precautionary instructions in this section which contain important warnings and or cautions regarding safety After reading keep this manual handy for future reference Safety Symbol and Message Conventions Safety symbols and messages described below are used in this manual to prevent bodily injury and property damage which could result from mishandling Before operating your product read this manual first and understand the safety symbols and messages so you are thoroughly aware of the potential safety hazards A WARNING A CAUTION Indicates a potentially hazardous situation which if mishandled could result in death or serious personal injury Indicates a potentially hazardous situation which if mishandled could result in moderate or minor personal injury and or property damage A WARNING When Installing the Unit Do not expose the unit to rain or an environment where it may be splashed by water or other liquids as doing so may result in fire or electric shock Use the unit only with the voltage specified on the unit Using a volt
Download Pdf Manuals
Related Search