Crownct1610-sm电路图.pdf

《Crownct1610-sm电路图.pdf》由会员分享，可在线阅读，更多相关《Crownct1610-sm电路图.pdf（459页珍藏版）》请在收音机爱好者资料库上搜索。

1、Com-Tech 810 and 1610 Amplifier Service Manual Rev. 0 KSVCCT810/1610 8/98 Commercial Audio E106377 120 VAC North American Units: 1998 by Crown International, Inc., P.O. Box 1000, Elkhart, Indiana 46515-1000 U.S.A. Telephone: 219-294-8000. Com-Tech amplifiers are produced by the Professional Audio Di

2、vision of Crown International, Inc. Trademark Notice: SmartAmp and Grounded Bridge are trademarks and Amcron, Crown, Com-Tech, IOC, ODEP, IQ System, P.I.P. and TEF are registered trademarks of Crown International, Inc. Other trademarks are the property of their respective owners. Models: Com-Tech 81

3、0 No weighting, 100 dB below full bandwidth power. Total Harmonic Distortion (THD): Less than 0.05% at full power from 20 Hz to 1 kHz increasing linearly to 0.1% at 20 kHz. Intermodulation Distortion (IMD): (60 Hz and 7 kHz 4:1) Less than 0.05% from -35 dB to full power bandwidth. Damping Factor: Gr

4、eater than 1000 from 10 Hz to 400 Hz (See Figure 2.2). Crosstalk: Greater than 70 dB down at 10 kHz. (See Figure 2.5). Common Mode Rejection Ration (CMRR): Better than 70 dB. Slew Rate: Greater than 17 volts per microsecond. Voltage Gain: (At the maximum level setting) 20:1 3% or 26 dB 0.25 dB. 90:1

5、 12% or 39 dB 1 dB with the input sensitivity set to 0.775 volts for 70 volt output. The following voltage gain specifications are for units with the input sensi- tivity set to 0.775 volts for 8/4 ohm output: Com-Tech 810: 64:1 12% or 36 dB 1 dB. Com-Tech 1610: 85:1 12% or 39 dB 1 dB. 2.2 Power Outp

6、ut Power: See the minimum Guaranteed Power table in Figures 2.6-7 for the output power specifications under a variety of conditions. It is extremely important to supply the amplifier with ad- equate AC power. Power amplifiers cannot add powerthey need the required voltage and current to deliver the

7、undistorted rated wattages you expect. Load Impedance: Safe with all types of loads. With 8/4 ohm output, all Com-Techs are rated for 4 to 8 ohms in Dual mode, 8 to 16 ohms in Bridge-Mono mode, and 2 to 4 ohms in Parallel-Mono mode. With a 70 volt output, rated loads vary among the different models

8、for each dual/mono mode (see the power matrices that follow). AC Power Requirements: All units require less than 90 watts at idle. See Section 3 for detailed information on AC power requirements and thermal dissipation. Low-Voltage Power Supply: 15 VDC regulated supplies are provided by a winding on

9、 the power transformer. Power Cord: An appropriate AC line cord is provided with a nominal cable length of 3 feet. 2.3 Controls Enable: A front panel rocker switch used to turn the amplifier on and off, and to enable the remote feature. Input Attenuation: A detented 21-position back panel Input Atte

10、nuation control for each channel. Output Mode: A back panel switch for each channel used to select 8/4-ohm or 70-volt output. Dual/Mono: A 3-position back panel switch used to select Dual, Bridge-Mono or Parallel-Mono operation. Reset: A back panel push button used to reset the amplifiers AC mains b

11、reaker. Input Sensitivity: A three-position switch inside the P.I.P. com- partment used to select an input sensitivity for both chan- nels: 0.775 volts for MAP at 1 kHz in 8/4 ohm mode, 0.775 volts for MAP at 1 kHz in 70-volt mode, or a voltage gain of 26 dB. 2 Specifications Com-Tech 810 and 1610 A

12、mplifier Service Manual 2-2 Rev. 0 2.4 Indicators Enable: This amber indicator shows the on/off status of the units 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 show audio output. IOC (Input

13、/Output Comparator): Each channel has a yellow indicator that flashes if the output waveform differs from the input waveform by 0.05% or more. The LEDs act as sensi- tive distortion indicators to provide proof of distortion-free performance. ODEP (Output Device Emulation Protection): Each channel ha

14、s a green multifunction indicator that shows the channels re- serve energy status. Normally, the LEDs are brightly lit to show that reserve energy is available. In the rare event that a channel has no reserve, its indicator will dim in proportion to ODEP limiting. 2.5 Input/Output Input Connector: A

15、 barrier block on the standard PIP2-BB with three-terminal balanced connections for input to each channel and test points for a DVM. Input Impedance: Nominally 20 K ohms, balanced. Nomi- nally 10 K ohms, unbalanced. Input Sensitivity: Settings include 0.775 volts for 8/4-ohm output, 0.775 volts for

16、70-volt output, and a voltage gain of 26 dB. Output Connector: A back panel barrier block with two-termi- nal connections for each output channel. Output Impedance: Less than 10 milliohms in series with less than 2 microhenries (see Figure 2.3). DC Output Offset: Less than 10 millivolts. RSVP: An RJ

17、11 modular connector on the back panel inter- faces with an RSVP to provide remote control of amplifier power on/off functions. 2.6 Output Signal Dual: Unbalanced, two-channel. Bridge-Mono: Balanced, single-channel. Channel 1 controls are active; Channel 2 should be turned down. Channel 1 red termin

18、al is positive, referenced to ground, when the input is positive. Parallel-Mono: Unbalanced, single-channel. Channel 1 con- trols are active; Channel 2 is bypassed. 2.7 Protection Com-Tech amplifiers are protected against shorted,open or mismatched loads; overloaded power supplies; excessive tempera

19、ture, chain destruction phenomena, input overload damage and high-frequency blowups. It also protects loudspeakers from input/output DC and turn-on/turn-off transients. If unreasonable operating conditions occur, the patented ODEP circuitry proportionally limits the drive level to protect the output

20、 devices, particularly in the case of elevated temperature. Transformer overheating results in a temporary shutdown of both channels. The transformer automatically resets itself when it has cooled to a safe temperature. Controlled by slew rate, voltage amplifiers protect against RF burnouts, and inp

21、ut overload protection is provided by current-limiting resistance at the input. Turn On: The four-second turn on delay prevents dangerous turn-on transients. “Soft-start” circuitry provides low inrush so power sequencers are rarely needed with multiple units. Note: The turn-on delay time may be chan

22、ged. Contact Crowns Technical Support Group for details. Circuit Breaker: Circuit breaker current ratings vary based on the Com-Tech model and AC mains voltage. All 100/120 VAC Units: Com-Tech 810: 20 amperes. Com-Tech 1610: 30 amperes. All 220/240 VAC Units: Com-Tech 810: 10 amperes. Com-Tech 1610:

23、 20 amperes. 2.8 Construction Durable black powdercoat finish on the steel chassis, front panel Lexan overlay, and specially-designed flow-through ventilation from front to side panels. Cooling: Internal heat exchangers with on-demand forced air cooling (fan is optional for the North American Com- T

24、ech 210 ). Dimensions: 19 inch (48.3 cm) standard rack mount width (EIA RS-310-B), 16 inch (40.6 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 requirements (see Figure 2.10). He

25、ight A:3.5 inches (8.9 cm) Models:Com-Tech 210 (All) Com-Tech 410 (North American) Com-Tech 810 and 1610 Amplifier Service Manual 2-3 Rev. 0 Height B:5.25 inches (13.3 cm) Models:Com-Tech 410 (100/120 VAC, 50/60 Hz) Com-Tech 410 (220/240 VAC, 50/60 Hz) Com-Tech 810 (All) Height C:7 inches (17.8 cm)

26、Model:Com-Tech 1610 (All) Approximate Weight: Center of gravity is 6 inches (15.2 cm) behind the front mounting surface. 120 VAC, 60 Hz North American Units: Com-Tech 810: 47 pounds, 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)

27、net; 66 pounds, 10 ounces (30.2 kg) shipping weight. 100/120 VAC, 50/60 Hz Units: Com-Tech 810: 45 pounds, 1 ounce (20.5 kg) net; 49 pounds, 10 ounces (22.5 kg) shipping weight. Com-Tech 1610: 54 pounds, 11 ounces (24.8 kg) net; 64 pounds, 3 ounces (29.1 kg) shipping weight. 220-240 VAC, 50/60 Hz Un

28、its: Com-Tech 810: 45 pounds, 4 ounces (20.5 kg) net; 49 pounds, 13 ounces (22.6 kg) shipping weight. Com-Tech 1610: 55 pounds, 2 ounces (25.0 kg) net; 64 pounds, 10 ounces (29.3 kg) shipping weight. C: 7 in (17.8 cm) OFF ODEP IOC SPI CH1CH2 B: 5.25 in (13.3 cm) A: 3.5 in (8.9 cm) 19 in (48.3 cm) 16

29、 in (40.6 cm) LOCAL REMOTE Figure 2.10 Mounting Dimensions Com-Tech 810 and 1610 Amplifier Service Manual 2-4 Rev. 0 101001 K10 K100 K FREQUENCY (Hz) +2 +1 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 201001 K10 K20 K 400 200 100 0 600 800 1000 1200 1400 FREQUENCY (H

30、z) 8 ohm 101001 K10 K100 K FREQUENCY (Hz) Figure 2.1 Typical Frequency Response Figure 2.2 Typical Damping Factor Figure 2.3 Typical Output Impedance Com-Tech 810 and 1610 Amplifier Service Manual 2-5 Rev. 0 Figure 2.4 Typical Phase Response Figure 2.5 Typical Crosstalk TEF Measurement 1001 K10 K20

31、K FREQUENCY (Hz) dB TECHRON TEF TECHRON TEF +45 0 45 1001 K10 K20 K FREQUENCY (Hz) TEF Measurement Com-Tech 810 and 1610 Amplifier Service Manual 2-6 Rev. 0 Crown specifications are guaranteed for three years. In an effort to provide you with as much information as possible about the high power-prod

32、ucing capabilities of your amplifier, we have created the following power matrices. Minimum Guaranteed Power Specifications Crowns minimum power specifications represent the absolute smallest amount of output power you can expect from your amplifier when it is driven to full output under the given c

33、onditions. Some spaces in each matrix may be left blank because the same guarantee is not provided for those conditionshowever, your amplifier will perform well under all conditions listed in each matrix. When measuring power, 0.1% THD appears to be the industry standard for distortion. Two of the m

34、aximum average power specifications shown in each minimum power matrix are measured at 0.1% THD so you can easily compare Crown specifications to those of other manufacturers. But this high level of distortion actually allows for some clipping which is undesirable. Because of this, a maximum average

35、 power specification at 0.05% THD is included in each minimum power matrix which represents non-clipped conditions. Although most manufacturers do not give you power specifications at 0.05% THD, we encourage them to provide these specifications so you will have a more realistic representation of the

36、 way amplifiers should be used in the real worldwithout a clipped output signal. Many manufacturers publish power specs with a tolerance of 1 dB or worse. This means their amplifier can deviate more than 20% in output! A 100 watt amplifier would meet their specification if it only produced 79.4 watt

37、s. Other manufacturers qualify their specs by saying Figure 2.6 Com-Tech 810 Minimum Power Matrix they are “typical, ” “subject to manufacturing toler- ances, ” “single channel driven” or that they are specified with “fuses bypassed. ” Each of these statements effectively removes any performance gua

38、rantee. In fact, some manufacturers use these tactics to generate large power numbers, and they dont even print a disclaimer. We take a dif- ferent approach at Crownour amplifiers are guaranteed to meet or exceed their specifications for three years. Further, because our published specs are set belo

39、w our “in-house” measure- ments, you can expect every Crown amplifier to meet or exceed its published minimum power specs. We believe you should get what you pay for. Minimum Power Notes: All minimum power specifications are based on 0.5% regulated AC mains with THD of less than 1.0% and an ambient

40、room temperature of 70 F (21 C). Standard EIA power (RS-490) is not shown here because it is identical to FTC Continuous Av- erage Power. 1. A 1 kHz sine wave is presented to the amplifier and the output monitored for nonlinear distor- tion. The level is increased until THD reaches 0.1%. At this poi

41、nt, average power per chan- nel is reported. 2. A sine wave is presented to the amplifier over the range from 20 Hz to 20 kHz and the output monitored for nonlinear distortion. The level at each frequency is increased until THD reaches 0.1%. At this point, average power per chan- nel is reported. 3.

42、 A 1 kHz sine wave is presented to the amplifier and the output monitored for nonlinear distor- tion. The level is increased until THD reaches 0.05%. At this point, average power per chan- nel is reported. 4. Continuous power in the context of Federal Trade Commission testing is understood to be a m

43、inimum of five minutes of operation. Har- monic distortion is measured as the RMS sum total and given as a percentage of the funda- mental output voltage. This applies for all watt- ages greater than 0.25 watts. Com-Tech 810 Minimum Guaranteed Power (Watts) Dual/Mono Mode Dual (both channels driven)

44、 Bridge-Mono (balanced output) Parallel-Mono FTC Continuous Average At 0.1% THD (See note 4) 1 kHz20Hz-20kHz Maximum Average Load in Ohms (Constant Voltage) AC Mains120 VAC, 60 Hz 1 kHz At 0.1% THD (See note 1) At 0.1% THD (See note 2) 20Hz-20kHz Dual (both channels driven) Bridge-Mono (balanced out

45、put) Parallel-Mono At 0.05% THD (See note 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 1

46、6 490 305 460 975 610 920 965 610 915 460 300 425 925 600 855 925 600 855 485 310 440 965 620 885 940 615 875 460 295 455 935 600 905 440 290 415 885 580 825 470 305 430 920 605 855 480 300 455 965 605 905 950 600 905 460 295 420 915 595 850 920 595 845 485 310 435 955 615 875 930 610 870 470 300 45

47、0 950 605 905 950 605 910 445 295 410 890 595 830 895 595 830 465 310 425 930 615 865 920 600 855 455 290 445 905 600 880 425 290 400 840 575 800 450 300 420 875 600 840 Com-Tech 810 and 1610 Amplifier Service Manual 2-7 Rev. 0 Figure 2.7 Com-Tech 1610 Minimum Power Matrix Com-Tech 1610 Minimum Guar

48、anteed Power (Watts) Dual/Mono Mode Dual (both channels driven) Bridge-Mono (balanced output) Parallel-Mono FTC Continuous Average At 0.1% THD (See note 4) 1 kHz20Hz-20kHz Maximum Average Load in Ohms (Constant Voltage) AC Mains120 VAC, 60 Hz 1 kHz At 0.1% THD (See note 1) At 0.1% THD (See note 2) 2

49、0Hz-20kHz Dual (both channels driven) Bridge-Mono (balanced output) Parallel-Mono At 0.05% THD (See note 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 775 515 830 1545 1035 1640 785 525 755 1550 910 1315 860 535