Vector DA-250DH CU Stereo Amplifier User Manual
Contents
1. BLOCK DIAGRAMS 141 DA 250D uii HR 1G ie Sig Ee bre nga 16 14 2 2500 cete eene er Re d 16 15 DIMENSIONAL DIAGRAM 17 16 SPECIFICATIONS 16 1 DA 250D CU e Net ache aa 18 16 2 DA 250DH CU eee deb tie Lee dee Dante nadia 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 specified2. ON BL OFF Setting this switch to ON pressed in transmits the Channel 1 input signal to both channels 1 and 2 Output signal levels can be individually adjusted with each channel s input level control 3 Note Be sure to first turn off the power switch when changing the CH 1 mode switch settings 11 Input terminals INPUTS Electronically balanced input terminals Each removable terminal block 3 pins is internally connected in parallel to the corresponding XLR type connector Removable terminal block 3 pins H Hot C Cold E Earth XLR type male connector XLR 3 31 equivalent Pin 1 Earth Pin 2 Hot Pin 3 Cold Caution when using an XLR type plug If a straight plug hits the rack s rear cover or wall behind the rack when it is used for connection use the L shaped plug instead 10 8 SETTINGS AND CONNECTIONS BRIDGE ON OFF switch CH 1 mode ON OFF switch Rear panel Ef CH2 CH1 1 PU H Hot 7 Earth HCE HCE ell else sows 9 BRIDGE G D 7 7 Lore Con Speaker output terminals with a terminal cover Input terminals Note The figure shows the DA 250D Step 1 Switch off the unit s power Step 2 Set the BRIDGE ON OFF switch and CH 1 mode ON OFF switch Step 3 Connect the sound source equi
3. by the manufacturer or sold with the apparatus When a cart is used use caution when moving the cart apparatus combination to avoid injury from tip over Unplug this apparatus during lightning storms or when unused for long periods of time e 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 d FCC REQUIREMENTS 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 Increase the separation between the equipment and receiver Connect the equipment into an outlet on a circuit different from that to which
4. change without notice for improvement e Accessories Power cord 2 Removable terminal plug 3 pins 2 Tamper proof 19 URL http www toa jp AW Corporation 133 22 125 50 WR
5. p 14 Protection Operation List When the power is switched on this indicator lights for about 2 seconds and then extinguishes 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 9 10 5 Hot 6 E Earth isis DA 250DH OUTPUTS CLASS 2 WIRING BRIDGE e Odo PARALLEL 17 6 AC inlet 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 switch BRIDGE BI OFF Used when bridge connecting the unit s Channels 1 and 2 See p 10 Settings and Connections 2 channel input mode Set BRIDGE switch to OFF factory preset 1 channel input mode Set BRIDGE switch to ON Note Be sure to first turn off the power switch when changing the BRIDGE switch settings OUTPUTS ime 02 98 17 10 CH1 mode ON OFF switch PARALLEL
6. screws securing the top cover of the unit then detach it Step 2 Change the jumper socket position to 4 dB or 10 dB for the Input sensitivity as illustrated below When a bridge connection is made Set the input sensitivity with the CH1 jumper socket when Channels 1 and 2 are bridge connected Input sensitivity setting for the CH2 is disabled Input sensitivity setting When set to 4 dB Factory preset When set to 10 dB Jumper socket Jumper socket 10 dB 4 dB Input Sensitivity Input Sensitivity 10 dB 4 dB 2 Viewed from top with the top cover detached 0 7 CH1 CH2 Front panel 3 High pass filter setting DA 250DH only When set to OFF Factory preset When set to ON ON OFF EE Hi Pass Filter ON OFF zs Hi Pass Filter Jumper socket Jumper socket Step 3 Change the jumper socket position to ON or OFF for the High pass filter as illustrated above DA 250DH only N CAUTION With the High pass filter jumper socket kept to the OFF position factory preset operating the unit for long periods of time while the Peak indicator is illuminated due to excessive input signal may damage the connected speakers possibly resulting in fire Operating the unit with the High pass filter jumper socket set to the ON position may decreas
7. the receiver is connected Consult the dealer or an experienced radio TV 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 AN 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 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 th
8. F DA 250D DA 250DH d 39 20 11 9 REMOVABLE TERMINAL PLUG CONNECTION Cautions sure to use shielded cables for audio signal lines Avoid soldering 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 7mm Connector connections Step 1 Loosen the terminal screw then insert the cable Step 2 Retighten the terminal screw Pull on the cable to ensure it is securely connected Slotted screwdriver 2 Tightens Loosens 1 Terminal screw Removable terminal Earth plug Cold Shielded cable Tip Recommended slotted screwdriver type Screwdriver with blade that is 3 mm 0 12 in width A shape 3 mm 0 12 gt A 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 250DH 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 Unscrew 7
9. Zu OA OPERATING INSTRUCTIONS DUAL POWER AMPLIFIERS DA 250D CU DA 250DH CU Note The figure shows the DA 250D Thank you for purchasing TOA s Dual Power Amplifier Please carefully follow the instructions in this manual to ensure long trouble free use of your equipment TOA Corporation TABLE OF CONTENTS 1 IMPORTANT SAFETY INSTRUCTIONS 3 2 SAFETY PRECAUTIONS t ttti tene 4 3 GENERALE DESCRIPTION he enn ydp ed bem 6 A FEATURES oe pool ut a beh utet uhi ra E 6 5 HANDLING PRECAUTIONS 1 sees 6 6 INSTALLATION PRECAUTIONS 7 7 NOMENCLATURE AND FUNCTIONS TOUT oio mee 8 aria EE 9 8 SETTINGS AND CONNECTIONS 10 8 1 Switch Settings and Speaker Connections 11 9 REMOVABLE TERMINAL PLUG CONNECTION 12 10 INPUT SENSITIVITY AND HIGH PASS FILTER ON OFF SETTINGS 13 11 PROTECTION OPERATION LIST 14 12 TAMPER PROOF CAP ATTACHMENT 14 13 CLEANING THE FILTER ire nr o acie ean Gn a d RR 15 14
10. al amplifier of 500 W 8 for DA 250D 39 2 for DA 250DH Their wide range of applications include stores and permanent sound systems 4 FEATURES e 1U rack mounting size Low power consumption and light weight An input signal to Channel 1 can be routed to both channels 1 and 2 and the output level adjusted using the input level 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 or 1 75 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 Install the unit in locations where the temperature is between 10 and 40 C 14 F and 104 F and the moisture is less than 90 RH no dew condensation must be form
11. e the possibility of speaker damage or fire due to excessive input signal When a bridge connection is made Perform the same setting for both Channels 1 and 2 Operating the unit with the different setting may cause unit failure Step 4 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 100 C Load disconnected Protection indicator lights Temperature rise inside 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 12 TAMPER PROOF CAP ATTACHMENT Contact the TOA dealer where the unit was purchased To protect the input level con
12. e 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 1U size 44 5 mm or 1 75 reference size 7 NOMENCLATURE AND FUNCTIONS Front 44 TOA DL Se 5 d DUAL POWER AMPLIFIER DA 250D C2 Note The figure shows the DA 250D 1 Power switch ON OFF 5 Indicators INPUT OUTPUT PEAK PROTECT Power is switched on and off with each The indicators are as follows from left to right depression of this switch ae Input indicator INPUT Lights green regardless of the input level 2 Power indicator POWER control setting when an input signal level Lights blue when the power is switched on exceeds about 20 dB Output indicator OUTPUT 3 Input level controls CH 1 BRIDGE CH 2 Lights yellow when an output level exceeds Adjust the input level of each channel about 1 W at an 8 load DA 250D or 19 6 load DA 250DH When a bridge connection is made Peak indicator PEAK Lights red when an output signal clips When Channels 1 and 2 are bridge connected distortion occurs BRIDGE ON OFF switch 9 is set to ON the CH 1 BRIDGE level control adjusts the input Protection indicator PROTECT levels of Channels 1 and 2 In this event the Lights red when the protection circuitry is CH 2 level control cannot be used activated See
13. e unit only with the voltage specified on the unit Using a voltage 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 DA 250DH only External wiring connected to the terminals marked with h requires installation by an instructed person DA 250DH only 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 so
14. ed 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 deform or discolor the unit 6 INSTALLATION PRECAUTIONS Rack mounting screws are not supplied with the unit AN CAUTION Be sure to use the screws with a diameter of over 5 mm 0 2 and length of over 12 mm 0 47 to mount the unit Failure to do so may cause personal injury 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 When mounting the unit in the rack also mount a Perforated Panel larger than 1U in size 1 at the top and the bottom of the rack and 2 above and below every 5 units e MIDI um B iih ut a ower m DA 250D 250DH fo fo BER DA 250D 250DH Power amplifiers uu ge C utt of Perforated panel ad o jo jo eje eje eje oo eje oloo eje eje eje ejes Robust structur
15. ensitivity selection jumper 4 dB 10 dB CH 1 INPUT CH1 H OUTPUT 1 pad Elo relay Lo cars 10 1 9 rO ON Current Limiter i SO Hz i CH1 Short Detector if 10 dB 1 i 1 101 ON OFF jumper Protection Circuit rot BRIDGE comig CH 1 sensitivity OUTPUT CH 2 INPUT selection jumper pot 4 dB 10 dB OUTPUT2 H i relay to 4 c o Em 2221 E o ET Of lo ie L PARALLEL E 191 Current Limiter CH2 switch SI ic BRIDGE ON OFF Short Dees OUTPUT CH2 switch CH 2 HPF On HOUSetor ined input level 10 dB ON OFF jumper Protection Circuit control s CH 2 sensitivity selection jumper 4 dB 10 dB 15 DIMENSIONAL DIAGRAM Unit mm inches 0 89 442 17 4 371 14 61 401 8 15 82 Y oy xU T NUT C3 CO el Ed tir A TIN GY 555 GY o oye TIE _ 465 18 31 482 18 98 18 16 SPECIFICATIONS 16 1 DA 250D CU Power Source 120 V AC 50 60 Hz Amplification system Digital class D Power Consumption 120 W based on UL CSA standards 650 W rated output 4 O x 2 420 W rated output 8 O x 2 Input 2 circuits 4 dB 1 23 V input level control in maximum position 10 kQ elec
16. erwise may result in fire or electric shock To avoid electric shocks be sure to switch off the unit s power when connecting speakers The unit is 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 0 2 and length of over 12 mm 0 47 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 With the High pass filter jumper socket kept to the OFF position factory preset operating the unit for long periods of time while the Peak indicator is illuminated due to excessive input signal may damage the connected speakers possibly resulting in fire Operating the unit with the High pass filter jumper socket set to the ON position may decrease the possibility of speaker damage or fire due to excessive input signal e 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 malfuncti
17. nsumption 120 W based on UL CSA standards 580 W rated output 19 6 O x 2 Input 2 circuits 4 dB 1 23 V input level control in maximum position 10 kQ electronically balanced removable terminal block 3 pins CH 1 mode ON OFF switch ON PARALLEL OFF Each ch Rated Output 2 channels 250 W x 2 19 6 1 channel BRIDGE 500 W 39 2 Q M4 screw terminal distance between barriers 8 8 mm 0 35 Frequency Response 20 20 000 Hz x1 dB HPF OFF 50 20 000 Hz 3 dB 0 dB HPF selectable with the inner jumper Total Harmonic Distortion 0 1 1 kHz 0 396 20 20 000 Hz HPF OFF 0 1 1 kHz 0 396 100 20 000 Hz HPF ON Protection Circuit Protection against excessive current flow due to overload short circuit unusual DC voltage output and heat sink temperature rise over 100 C S N Ratio 100 dB A weighted Crosstalk 70 dB A weighted LED Indicator Power blue x 1 Input green x 2 Output yellow x 2 Peak red x 2 Protect red x 2 Cooling Forced air cooling Operating Temperature 10 C to 40 14 F to 104 F Operating Humidity Under 9096 RH no condensation Finish Panel Aluminum black alumite Case Plated steel sheet Dimensions 482 w x 44 h x 401 8 d mm 18 98 x 1 73 x 15 82 Weight 0 dB 0 775 V 5 kg 11 02 Ib Note The design and specifications are subject to
18. on 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 outlet 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 0 12 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 250D and DA 250DH Dual Power Amplifiers feature high power handling capabilities and durability The DA 250D is configured with 250 W x 2 channels 4 output and 170 W x 2 channels 8 output and the DA 250DH features a 250 W x 2 channels 19 6 output configuration Besides each model s output is made available for bridge connection allowing it to be used as a monaur
19. pment to the Input terminals Note Refer to p 12 for the removable terminal plug connection Step 4 Connect speakers to the Speaker output terminals 4 1 Unscrew the output terminal cover 4 2 Strip 10 mm 0 39 of insulative jacket from the end of the speaker cable as shown in the figure at right 4 3 Connect speaker cables to the output terminals to 397 4 4 Replace the output terminal cover place Be sure to replace the unit s terminal cover after connection completion WARNING Because high voltage is generated at the speaker output terminals never touch these terminals to avoid electric shock DA 250DH only 8 1 Switch Settings and Speaker Connections 2 inputs 2 outputs factory preset CH1 2 7 d CH2 CH2 o d OEE 1 input 2 outputs r d CH2 i mt de 1 1 input 1 output CH1 o Lfe l Y om Q 1 ft as Speaker output terminals 9e DA 250DH 4 80 BRIDGE OFF CH 1 mode OFF Dee 4 80 zu Speaker output terminals ge gu 19 6 0 19 6 0 DA 250DH BRIDGE OFF CH 1 mode ON DA 250D 19 6 Q 19 6 0 BRIDGE ON CH 1 mode OF
20. trol from accidental operation it is recommended to replace the control knob with the supplied tamper proof cap as illustrated Input level control Tamper proof cap accessory 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 m Filter m C J Ventilation Panel Detach the panel by pressing on the left or right side 15 16 14 BLOCK DIAGRAMS 14 1 DA 250D CH1 CH 1 INPUT OUTPUT H Jo OUTPUT 1 1 o relay 1010 41 E o O po CO Current Limiter el 4 dB Short Detector CH1 10 dB 5 input level oif Protection Circuit rot BRIDGE control CH 1 sensitivity H OUTPUT CH2INPUT selection jumper OUTPUT2 H T 4 dB 10 dB ON relay po Lio ro E 1060 L nr PARALLEL OFF Current Limiter ME switch EI 44 dB BRIDGE ON OFF switch Short Detector 1 2 10 dB Protection Circuit input level 101 control CH 2 s
21. tronically balanced removable terminal block 3 pins CH 1 mode ON OFF switch ON PARALLEL OFF Each ch Rated Output 2 channels 250 2 4 170 W x 2 8 0 1 channel BRIDGE 500 W 8 Q M4 screw terminal distance between barriers 8 8 mm 0 35 Frequency Response 20 20 000 Hz 1 dB Total Harmonic Distortion 0 1 1 kHz 0 3 20 20 000 Hz Protection Circuit Protection against excessive current flow due to overload short circuit unusual DC voltage output and heat sink temperature rise over 100 C S N Ratio 100 dB A weighted Crosstalk 70 dB A weighted LED Indicator Power blue x 1 Input green x 2 Output yellow x 2 Peak red x 2 Protect red x 2 Cooling Forced air cooling Operating Temperature 10 C to 40 C 14 F to 104 F Operating Humidity Under 9096 RH no condensation Finish Panel Aluminum black alumite Case Plated steel sheet Dimensions 482 w x 44 h x 401 8 d mm 18 98 x 1 73 x 15 82 Weight 0 dB 0 775 V 5 kg 11 02 Ib Note The design and specifications are subject to change without notice for improvement e Accessories Power cord 2 m Removable terminal plug 3 pins 2 Tamper proof 16 2 DA 250DH CU Power Source 120 V AC 50 60 Hz Amplification system Digital class D Power Co
22. unds To prevent a fire or electric shock never open nor remove the unit case as there 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 Avoid installing the unit in humid or dusty locations in locations exposed to the direct sunlight near the heaters or in locations generating sooty smoke or steam as doing oth
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