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Page 46

Com-Tech Power Amplifiers

Reference Manual

Fig. 7.2 Com-Tech 410 Power Draw, Current Draw and Thermal Dissipation at Various Duty Cycles

Fig. 7.3 Com-Tech 810 Power Draw, Current Draw and Thermal Dissipation at Various Duty Cycles

Fig. 7.4 Com-Tech 1610 Power Draw, Current Draw and Thermal Dissipation at Various Duty Cycles

8 Ohm Dual / 16 Ohm Bridge-Mono / 4 Ohm Parallel-Mono

L O A D

50%

40%

30%

20%

10%

390

320

250

180

110

550

470

385

305

220

410

335

265

190

115

150

125

100

395

325

255

185

115

575

490

405

320

240

4.7

3.8

3.0

2.2

1.3

4.9

4.0

3.2

2.3

1.4

4.8

3.9

3.1

2.2

1.4

Duty

Cycle

AC Mains

Power

Draw

(Watts)

btu/hr

Current Draw (Amps)

2.1

1.7

1.4

1.0

0.6

2.2

1.8

1.4

1.0

0.6

2.2

1.8

1.4

1.0

0.6

4 Ohm Dual / 8 Ohm Bridge-Mono / 2 Ohm Parallel-Mono

70 V

Com-Tech 410

140

120

100

kcal/hr

580

490

400

315

225

145

125

105

100-120 V 220-240 V

Thermal Dissipation

btu/hr

Current Draw (Amps)

kcal/hr

100-120 V 220-240 V

Thermal Dissipation

btu/hr

Current Draw (Amps)

kcal/hr

100-120 V 220-240 V

Thermal Dissipation

AC Mains

Power

Draw

(Watts)

AC Mains

Power

Draw

(Watts)

8 Ohm Dual / 16 Ohm Bridge-Mono / 4 Ohm Parallel-Mono

L O A D

50%

40%

30%

20%

10%

535

440

350

255

160

785

670

560

450

335

820

670

520

370

220

285

240

195

150

100

810

670

525

385

245

1190

1020

850

680

510

6.4

5.3

4.2

3.0

1.9

9.9

8.0

6.2

4.4

2.6

9.7

8.0

6.3

4.6

2.9

Duty

Cycle

AC Mains

Power

Draw

(Watts)

btu/hr

Current Draw (Amps)

2.9

2.4

1.9

1.4

0.9

4.5

3.7

2.8

2.0

1.2

4.4

3.6

2.9

2.1

1.3

4 Ohm Dual / 8 Ohm Bridge-Mono / 2 Ohm Parallel-Mono

70 V

Com-Tech 810

200

170

140

115

kcal/hr

1125

945

765

585

405

300

260

215

170

130

100-120 V 220-240 V

Thermal Dissipation

btu/hr

Current Draw (Amps)

kcal/hr

100-120 V 220-240 V

Thermal Dissipation

btu/hr

Current Draw (Amps)

kcal/hr

100-120 V 220-240 V

Thermal Dissipation

AC Mains

Power

Draw

(Watts)

AC Mains

Power

Draw

(Watts)

8 Ohm Dual / 16 Ohm Bridge-Mono / 4 Ohm Parallel-Mono

L O A D

50%

40%

30%

20%

10%

920

755

590

425

260

1300

1100

905

705

510

1435

1165

895

630

360

485

400

320

240

160

1590

1295

1000

700

405

2140

1790

1435

1085

730

11.1

9.1

7.1

5.1

3.1

17.3

14.0

10.8

7.6

4.3

19.1

15.6

12.0

8.4

4.9

Duty

Cycle

AC Mains

Power

Draw

(Watts)

btu/hr

Current Draw (Amps)

5.0

4.1

3.2

2.3

1.4

7.8

6.4

4.9

3.4

2.0

8.7

7.1

5.5

3.8

2.2

4 Ohm Dual / 8 Ohm Bridge-Mono / 2 Ohm Parallel-Mono

70 V

Com-Tech 1610

330

280

230

180

130

kcal/hr

1915

1590

1270

950

630

540

450

365

275

185

100-120 V 220-240 V

Thermal Dissipation

btu/hr

Current Draw (Amps)

kcal/hr

100-120 V 220-240 V

Thermal Dissipation

btu/hr

Current Draw (Amps)

kcal/hr

100-120 V 220-240 V

Thermal Dissipation

AC Mains

Power

Draw

(Watts)

AC Mains

Power

Draw

(Watts)

Содержание Com-Tech CT-1610

Страница 1: ...please visit the Crown website at www crownaudio com 2001 by Crown Audio Inc P O Box 1000 Elkhart IN 46515 1000 U S A Telephone 219 294 8000 Fax 219 294 8329 Trademark Notice Amcron BCA and Crown are registered trademarks of Crown International Inc Other trademarks are the property of their respective owners Obtaining Other Language Versions To obtain information in another language about the use ...

Страница 2: ...Page 2 Com Tech Power Amplifiers Reference Manual This page intentionally left blank ...

Страница 3: ...trician for replacement of the obsolete outlet 10 Protect the power cord from being walked on or pinched particularly at plugs convenience recep tacles and the point where they exit from the appara tus 11 Only use attachments accessories specified by the manufacturer 12 Use only with a cart stand bracket or table speci fied by the manufacturer or sold with the apparatus When a cart is used use cau...

Страница 4: ...eriodofthree 3 yearsfromthedateofpurchasebytheoriginalpurchaser the warrantyperiod thatthenewCrownproductisfreeofdefectsinmaterials and workmanship We further warrant the new Crown product regardless of the reason for failure except as excluded in this Warranty ITEMS EXCLUDED FROM THIS CROWN WARRANTY This Crown Warranty is in effect only for failure of a new Crown product which occurred within the...

Страница 5: ...sign production or variations of the equipment Nor does it cover every possible situation which may arise during installation operation or mainte nance If your unit bears the name Amcron please substitute it for the name Crown in this manual If you need special assistance beyond the scope of this manual please contact our Technical Support Group Crown Technical Support Group Plant 2 SW 1718 W Mish...

Страница 6: ...ors 25 4 3 Protection Systems 26 4 3 1 ODEP 26 4 3 2 Standby Mode 27 4 3 3 Transformer Thermal Protection 27 4 3 4 Circuit Breaker 27 4 4 Controls 28 4 5 Energy Savings Circuit Application 29 4 6 Filter Cleaning 29 5 Technical Information 29 5 1 Overview 29 5 2 Circuit Theory 30 5 2 1 Dual Operation 30 5 2 2 Bridge Mono Operation 31 5 2 3 Parallel Mono Operation 31 6 Specifications 32 7 AC Power D...

Страница 7: ...ODEP IOC and Signal Presence Indicator States 26 4 3 Input Sensitivity Switch 28 5 1 Circuit Block Diagram 30 6 1 Com Tech 210 Minimum Power Matrix 35 6 2 Com Tech 410 Minimum Power Matrix 36 6 3 Com Tech 810 Minimum Power Matrix 37 6 4 Com Tech 1610 Minimum Power Matrix 38 6 5 Com Tech 210 Maximum Power Matrix 39 6 6 Com Tech 410 Maximum Power Matrix 40 6 7 Com Tech 810 Maximum Power Matrix 41 6 ...

Страница 8: ...Page 8 Com Tech Power Amplifiers Reference Manual Fig 1 1 Com Tech Amplifiers 120 VAC 60 Hz Units ...

Страница 9: ...epts new accessory modules that further tailor the amplifier to suit specific applications including wideband load current monitoring Drives constant voltage lines without lossy distortion producing step up transformers Two mono modes Bridge Mono and Parallel Mono for driving a wide range of load impedances Very low harmonic and intermodulation distortion give the best dynamic transfer function in...

Страница 10: ...e output voltage is greater than 34 mV see Section 4 2 F Enable Indicator This indicator lights when the amplifier has been en abled or turned on and AC power is available The enable indicator will dim when the energy saving circuit is activated see Section 4 2 G Enable Switch This rocker switch is used to turn the amplifier on off and enable the remote feature When turned on by ei ther the rocker...

Страница 11: ... Input Sensitivity Switch located in side the amplifier is accessed by removing the PIP module It is set at the factory to 0 775 volts for maxi mum average power 1 kHz power into 8 ohms It can also be set to 0 775 volts for 1 kHz output in 70 volt mode or an overall voltage gain of 26 dB see Section 4 4 N Input Attenuation Controls Each channel s output level can be adjusted accurately using these...

Страница 12: ...unting surface As you can see in Fig ure 3 1 Com Tech amplifiers vary in their vertical di mensions Figure 3 1 labels the different heights as A B and C These letters correspond to the list that follows showing Com Tech models and their vertical dimen sions Height A 3 5 inches 8 9 cm Models Com Tech 210 All Com Tech 410 North American Height B 5 25 inches 13 3 cm Models Com Tech 410 100 120 VAC 50...

Страница 13: ...clogged dust filters A Com Tech am plifier should be mounted in a way that allows sufficient air flow into the front intakes out the side exhaust vents and out the back of the rack If your rack has a front door it is usually best to leave it open and avoid block ing the air intakes If this is impossible supplement the air flow by mounting a grille in the door or with a rack mounted blower If you i...

Страница 14: ...put mode switches to the 70 VOLT right position If required by your system design Com Tech amplifiers can be configured for either bridge mono or parallel mono modes of operation To switch your amplifier ac cordingly start by removing power from the unit Next BLOWER OPTION 2 BLOWER OPTION 1 AIR FLOW FRONT OF RACK DOOR AIR FLOW EQUIPMENT RACK SIDE VIEW Fig 3 3 Extra Cooling with a Rack Mounted Blow...

Страница 15: ...t s level control turned down so that a 775 volt input signal will not overdrive that channel see Section 4 4 ALWAYS configure both channels the same when using Bridge Mono or Parallel Mono modes Because of the way Com Tech amplifiers are designed they can be used to directly drive constant voltage lines in 8 4 ohm mode Being able to use lower constant volt age levels can be very convenient if bui...

Страница 16: ...the Com Tech 410 can drive a 35 volt line the Com Tech 810 can drive a 50 volt line and the Com Tech 1610 can drive a 70 volt line Using Bridge Mono mode these voltage lev els are doubled for a single channel Again to effectively use different constant voltage levels you may need to cross reference the ratings for the step down transformers taps using Crown s constant voltage com puter see Section...

Страница 17: ...O NOT USE THE CHANNEL 2 INPUT or the signal level and quality may be greatly degraded Also keep the Channel 2 Input Attenuation control turned down completely counter clockwise Note The Channel 2 input jack and Input Attenuation control are not defeated in Bridge Mono mode A signal feeding Channel 2 will work against the Channel 1 sig nal and usually results in distortion and inefficient op eratio...

Страница 18: ...8 4 OHM MODE TURN OFF THE AMPLIFIER BEFORE CHANGING THE DUAL MONO SWITCH NOT USED BRIDGE MONO DUAL PARALLEL MONO 70 VOLT 70 VOLT 8 4 OHM 8 4 OHM CH1 CH2 TURN OFF THE AMPLIFIER BEFORE CHANGING THE OUTPUT MODE SWITCHES WARNING BOTH CHAN NELS MUST BE SET TO 8 4 OHM MODE CH 2 CH 1 0 dB 5 1 2 3 4 5 6 7 8 9 10 11 13 15 17 19 21 25 32 0 dB 5 1 2 3 4 5 6 7 8 9 10 11 13 15 17 19 21 25 32 PRES S R E S E T P...

Страница 19: ... or ground lead from the load connects to the ground terminal of Channel 1 Finally install a jumper wire of at least 14 gauge be tween the positive terminals of both channels CAUTION When Parallel Mono wiring is installed do NOT operate in Dual or Bridge Mono mode until the wiring is removed especially the jumper wire Fail ure to do so will result in high distortion and exces sive heating 3 3 2 Au...

Страница 20: ... BB has space on its circuit board for the addition of input filter circuitry A third problem to avoid is hum The two most common sources of hum in an audio system are inductive cou pling and ground loops Inductive coupling can occur when input cables are subjected to a magnetic field from a power cord or power transformer One way to prevent inductive cou pling is to lace the input cables together...

Страница 21: ...ccessory module can control racks of am plifiers at remote locations providing a system master power on off switching function A maximum of 21 am plifiers can be attached to each R S V P module how ever an unlimited number of R S V P modules can be slaved together to accommodate any system size The power on off function is controlled from an IQ Sys tem AUX or Control Port or from a simple remote c...

Страница 22: ...ypical damping factors are 50 or lower Higher damping fac tors yield lower distortion and greater motion control over the loudspeakers A common damping factor for commercial applications is between 50 and 100 Higher damping factors may be desirable for live sound but long cable lengths often limit the highest damping factor that can be achieved practically Un der these circumstances Crown s IQ Sys...

Страница 23: ...z is recommended some applications may benefit from an even higher 3 dB frequency Such a filter is described with infrasonic frequency problems in Section 3 3 2 Another way to protect inductive loads from large low frequency currents and prevent the amplifier from pre maturely activating its protective systems is to parallel a 590 to 708 µF nonpolarized motor start capacitor and a 4 ohm 20 watt re...

Страница 24: ...system com pliance these cords must be plugged into a local cabinet mounted commercial grade electrical out let box Extension cords are not recommended or adequate Use an isolated wall outlet whenever possible with the correct voltage and adequate current Voltages greater than 10 above the specified AC mains voltage for the amplifier may damage the 15 volt regulator filter ca pacitors and output t...

Страница 25: ... has been turned on or enabled It will dim when the unit goes into energy saving mode When the Enable indicator is lit the low voltage power supply is working It does not indicate the status of the high voltage power supplies For example the Enable indi cator will remain lit in the unlikely event that one of the amplifier s protection systems described in Sec tion 4 3 puts the channel in standby m...

Страница 26: ...output circuitry To do this Crown established a rigorous program to measure the safe operating area SOA of each output device before installing it in an amplifier Next Crown designed intelligent circuitry to simulate the instanta neous operating conditions of the output devices Its name describes what it does Output Device Emulation Protection or ODEP In addition to simulating the operat ing condi...

Страница 27: ...lifier s fault protection system will put an am plifier channel into standby mode in rare situations where heavy common mode current is detected in a channel s output The amplifier should never output heavy DC current unless its circuitry is damaged in some way and putting the channel in standby mode helps to prevent further damage 4 3 3 Transformer Thermal Protection All Com Tech amplifiers have ...

Страница 28: ...gain or the unit fails to operate properly contact an authorized service center or Crown s Technical Support Group A three position input sensitivity switch is located in side the amplifier s PIP compartment It is set at the fac tory to a sensitivity of 0 775 volts 8 4 ohm mode Fig 4 3 Input Sensitivity Switch Please notice that there is a separate 0 775 volt position for 70 volt mode If desired t...

Страница 29: ... side NPN The two channels may be used together to double the voltage Bridge Mono or current Parallel Mono pre sented to the load This feature gives you flexibility to maximize power available to the load A wide bandwidth multiloop design is used for state of the art compensation This produces ideal behavior and results in ultra low distortion values Aluminum extrusions have been widely used for h...

Страница 30: ...PIP barrier block passes directly into the balanced input stage The balanced input stage causes balanced to single ended conversion using a difference amplifier Next the variable gain stage ampli fies or attenuates the signal The gain of this stage is set by the position of the input sensitivity switch and the back panel Input Attenuation control The error amp amplifies the difference between the ...

Страница 31: ...to the Channel 1 input jack and the load between the positive output terminals on the back panel twice the volt age can be output The Channel 1 output feeds the Channel 2 error amp Because there is a net inversion the Channel 2 output is out of polarity with Channel 1 This produces twice as much voltage across the load Each of the channel s protection mechanisms work independently if a fault occur...

Страница 32: ...to 0 775 volts for 8 4 ohm output Com Tech 210 38 1 6 or 32 dB 0 5 dB Com Tech 410 55 1 6 or 35 dB 0 5 dB Com Tech 810 64 1 6 or 36 dB 0 5 dB Com Tech 1610 85 1 6 or 39 dB 0 5 dB Power Output Power See the Minimum Guaranteed Power tables in Figures 6 1 4 for the output power specifica tions under a variety of conditions It is extremely important to supply the amplifier with ad equate AC power Powe...

Страница 33: ...cm depth behind mounting surface and 0 25 inches 0 6 cm in front of mounting surface Amplifier height varies among the available models and with different AC power require Indicators Enable This amber indicator shows the on off status of the unit s low voltage power supply and the activation of the energy saving mode SPI Signal Presence Indicator Each channel has a green indicator that flashes to ...

Страница 34: ...nds 4 ounces 21 5 kg net 50 pounds 8 ounces 22 9 kg shipping weight Com Tech 1610 57 pounds 14 ounces 26 3 kg net 66pounds 10 ounces 30 2kg shippingweight 100 120 VAC 50 60 Hz Units Com Tech 210 31 pounds 6 ounces 14 2 kg net 35 pounds 8 ounces 16 1 kg shipping weight Com Tech410 38pounds 15 ounces 17 7kg net 43 pounds 4 ounces 19 6 kg shipping weight Com Tech 810 45 pounds 1 ounces 20 5 kg net 49...

Страница 35: ...put Parallel Mono 220 240 VAC 50 60 Hz 50 70V 4 2 100 140V 8 25 70V 8 4 16 50 70V 4 2 100 140V 8 25 70V 8 4 16 50 70V 4 2 100 140V 8 25 70V 8 4 16 150 110 110 300 220 205 295 215 210 145 110 105 290 220 205 290 215 210 150 115 105 300 230 215 300 225 215 135 105 105 270 210 200 135 105 95 265 210 195 140 110 100 275 220 200 145 105 110 295 215 205 290 210 205 145 110 105 285 220 205 285 210 205 15...

Страница 36: ...te 3 1 kHz 100 120 VAC 50 60 Hz Dual both channels driven Bridge Mono balanced output Parallel Mono 220 240 VAC 50 60 Hz 25 70V 4 2 50 140V 8 12 5 70V 8 4 16 25 70V 4 2 50 140V 8 12 5 70V 8 4 16 25 70V 4 2 50 140V 8 12 5 70V 8 4 16 240 220 225 475 450 455 440 440 455 240 220 225 465 435 455 450 445 455 240 220 225 465 445 460 430 435 455 215 210 215 425 425 435 215 205 220 415 410 435 215 210 220 ...

Страница 37: ...3 1 kHz 100 120 VAC 50 60 Hz Dual both channels driven Bridge Mono balanced output Parallel Mono 220 240 VAC 50 60 Hz 12 5 70V 4 2 25 140V 8 6 25 70V 8 4 16 12 5 70V 4 2 25 140V 8 6 25 70V 8 4 16 12 5 70V 4 2 25 140V 8 6 25 70V 8 4 16 490 305 460 975 610 920 965 610 915 460 300 425 925 600 855 925 600 855 485 310 440 965 620 885 940 615 875 460 295 455 935 600 905 440 290 415 885 580 825 470 305 4...

Страница 38: ...ote 3 1 kHz 100 120 VAC 50 60 Hz Dual both channels driven Bridge Mono balanced output Parallel Mono 220 240 VAC 50 60 Hz 6 25 70V 4 2 12 5 140V 8 3 13 70V 8 4 16 6 25 70V 4 2 12 5 140V 8 3 13 70V 8 4 16 6 25 70V 4 2 12 5 140V 8 3 13 70V 8 4 16 870 540 960 1745 1080 1805 1745 1080 1780 815 535 860 1625 1070 1700 1660 1080 1700 840 545 875 1675 1090 1755 1650 1075 1745 810 520 910 1595 1040 1725 77...

Страница 39: ...to the ampli fier and monitored for non linear distortion The aver age power during the burst is reported Loudspeakers must be able to withstand this level if they are to be safely used with this am plifier 2 A 40 millisecond sine wave burst 10 percent duty cycle is presented to the amplifier and monitored for nonlinear distortion Aver age power during the burst is reported This power level is a m...

Страница 40: ... 2 50 140V 8 12 5 70V 8 4 16 320 265 305 620 520 590 615 505 595 315 240 280 620 475 555 610 470 550 315 240 280 625 475 665 605 465 550 415 300 330 820 600 655 805 595 650 415 285 310 820 570 615 790 560 615 405 285 315 820 575 675 745 565 610 460 360 340 875 720 675 825 715 680 555 330 325 1110 665 645 1080 655 645 435 335 325 860 665 680 745 645 645 450 355 330 855 705 655 810 700 655 550 325 3...

Страница 41: ... 70V 8 4 16 515 320 480 1010 640 980 1060 645 975 460 230 475 915 600 920 900 600 915 475 305 475 930 605 920 910 600 915 575 340 530 1120 680 1045 1160 685 1045 605 295 545 1195 705 1085 1195 700 1070 610 360 545 1190 705 1085 1185 710 1080 695 385 590 1405 770 1185 1390 765 1170 750 375 610 1500 810 1230 1485 805 1210 755 405 615 1530 815 1225 1475 790 1225 690 375 575 1385 755 1145 1380 755 113...

Страница 42: ...8 4 16 780 525 950 1600 1050 1770 1590 1140 1895 820 555 955 1635 1090 1895 1640 1090 1845 800 535 885 1600 1055 1800 1615 1065 1855 1000 600 1035 1995 1185 1980 1985 1170 2015 1060 655 1100 2095 1285 2165 2105 1300 2110 1060 630 1025 2060 1225 2115 2100 1230 2080 1245 670 1205 2480 1330 2315 2465 1330 2375 1370 750 1295 2700 1475 2550 2715 1470 2530 1295 700 1210 2580 1410 2475 2585 1415 2450 121...

Страница 43: ... 0 1 2 3 4 dB 5 6 7 4 ohm 8 ohm 1 watt 504 0 126 8 31 8 MILLIOHMS 8 0 2 0 6 dB 20 100 1 K 10 K 20 K 400 200 100 0 600 800 1000 1200 1400 FREQUENCY Hz 8 ohm 10 100 1 K 10 K 100 K FREQUENCY Hz Fig 6 9 Typical Frequency Response Fig 6 10 Typical Damping Factor Fig 6 11 Typical Output Impedance ...

Страница 44: ...iers Reference Manual TECHRON TEF 45 0 45 100 1 K 10 K 20 K FREQUENCY Hz 100 1 K 10 K 20 K FREQUENCY Hz dB TECHRON TEF 66 72 78 84 90 96 102 Fig 6 12 Typical Phase Response Fig 6 13 Typical Crosstalk TEF Measurement TEF Measurement ...

Страница 45: ...iciency 65 Quiescent Power Draw watts The value used for quiescent power draw includes both the amplifier s quiescent power draw for the selected output mode and the power drawn by the fan if one is installed these values are listed in the previous col umn The following equation converts power draw in watts to current draw in amperes Current Draw amperes AC Mains Power Draw watts x AC Mains Voltag...

Страница 46: ... 370 220 285 240 195 150 100 810 670 525 385 245 1190 1020 850 680 510 6 4 5 3 4 2 3 0 1 9 9 9 8 0 6 2 4 4 2 6 9 7 8 0 6 3 4 6 2 9 Duty Cycle AC Mains Power Draw Watts btu hr Current Draw Amps 2 9 2 4 1 9 1 4 0 9 4 5 3 7 2 8 2 0 1 2 4 4 3 6 2 9 2 1 1 3 4 Ohm Dual 8 Ohm Bridge Mono 2 Ohm Parallel Mono 70 V Com Tech 810 200 170 140 115 85 kcal hr 1125 945 765 585 405 300 260 215 170 130 100 120 V 22...

Страница 47: ...ssor with DSP Digital Signal Processing for PIP compatibleamplifiers AsacomponentoftheIQSystem it connects the amplifier to the Crown Bus so the amplifier can be controlled and monitored Its DSP capabilities enable it to be programmed with a variety of functions such as filters and crossovers signal delay input compressorandoutputlimiter andavarietyofotheruseful features similar to those included ...

Страница 48: ... to each channel P I P BEQC adds many features of the Bose Controllers to the input of your amplifier Each channel includes a cus tom equalization network for Bose loudspeakers Also in cluded is a bass cut high pass filter for each channel The equalization and bass cut filters can be bypassed if desired Balanced inputs and daisy chain outputs use removable barrier block connectors for quick solder...

Страница 49: ...210 Cooling Fan A cooling fan part GCT200FAN is available for North American Com Tech 210s all other units include a fan We recommend the kit if you will be operating a Com Tech 210 at high levels in high temperatures for long periods or with high duty cycle input signal see Sec tion 3 2 1 Contact an authorized Crown servicer for installation of the optional fan kit 8 4 Constant Voltage Computer C...

Страница 50: ... factory For warranty service we will pay for ground shipping both ways in the United States Contact Crown Factory Service or Technical Support to obtain prepaid ship ping labels prior to sending the unit Or if you prefer you may prepay the cost of shipping and Crown will reimburse you Send copies of the shipping receipts to Crown to receive reimbursement Factory Service Shipping Instructions 1 Wh...

Страница 51: ..._____________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________...

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