Yamaha p4500 电路图.pdf

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1、POWER AMPLIFIER Owners Manual Mode demploi Bedienungsanleitung Manual de instruccines TEMP PROTECTION POWER ON OFF AB CLIP SIGNAL dB?0?0 40 30 20 15 10 3 6 25 40 30 20 15 10 3 6 25 EEEngine M RadioFans.CN 收音机爱 好者资料库 Introduction English Thank you for purchasing a Yamaha P4500/3200/1600 series power

2、amplifier. This series of audio amps was developed from Yamahas wealth of experience in building PA equipment and its tradition of careful attention to every detail of circuit design. These amps feature high power and superb quality together with superior reliability and stability, guarantee- ing th

3、e highest possible audio performance. Main features of the P4500/P3200/P1600 series Three types of input jack (balanced XLR type connectors, balanced phone jacks, and barrier strip), and five-way binding post output jacks are provided, allowing use in a wide variety of situations including installed

4、 applications. Three operating modes are provided: STEREO mode in which CHANNEL A and B operate independently, PARALLEL mode in which a mono source is output by two amp systems, and BRIDGE mode in which the unit operates as a single high-power amplifier. A SIGNAL indicator and CLIP indicator is prov

5、ided for each channel. The PROTECTION indicator shows the status of protective circuitry such as power-on/off protection, output muting, and the DC detection circuit. The TEMP indicator warns of heat sink overheating. Variable-speed low-noise fan(s) ensures high reliability even under demanding cond

6、itions. This owners manual covers the three models P4500, P3200 and P1600. In order to take full advantage of your power amp and enjoy long and trouble-free operation, please read this owners manual carefully before use. IMPORTANT NOTICE FOR THE UNITED KINGDOM Connecting the Plug and Cord WARNING: T

7、HIS APPARATUS MUST BE EARTHED IMPORTANT: The wires in this mains lead are coloured in accordance with the following code: GREEN-AND-YELLOW : EARTH BLUE : NEUTRAL BROWN : LIVE As the colours of the wires in the mains lead of this apparatus may not correspond with the coloured markings identifying the

8、 terminals in your plug, proceed as follows: The wire which is coloured GREEN and YELLOW must be connected to the terminal in the plug which is marked by the letter E or by the safety earth symbol or coloured GREEN and YELLOW. The wire which is coloured BLUE must be connected to the terminal which i

9、s marked with the letter N or coloured BLACK. The wire which is coloured BROWN must be connected to the terminal which is marked with the letter L or coloured RED. * This applies only to products distributed by YAMAHA KEMBLE MUSIC (U.K.) LTD. RadioFans.CN 收音机爱 好者资料库 Precautions 1.Avoid excessive hea

10、t, humidity, dust and vibration. Keep the unit away from locations where it is likely to be exposed to high temperatures or humidity such as near radiators, stoves, etc. Also avoid locations which are subject to excessive dust accumulation or vibration which could cause mechanical damage. 2.Ventilat

11、ion Allow a distance of 10 cm between the unit and the wall so that heat generated from the unit will be released effectively. Also, allow enough space between the unit and other devices. If you mount the unit in an audio rack, keep a space of 10 cm on the top panel, and a space of 1 cm to the side

12、panel. Remove the rear panel of the rack or open a vent hole. If heat release is inadequate, the unit will retain heat inside the unit, which may cause a fire. 3.Avoid physical shocks. Strong physical shocks to the unit can cause damage. Handle it with care. 4.Do not open the case or attempt repairs

13、 or modifica- tions yourself. This product contains no user-serviceable parts. Refer all maintenance to qualified Yamaha service personnel. Opening the case and/or tampering with the internal circuitry will void the warranty. 5.Make sure power is off before making or removing connections. Always tur

14、n the power OFF prior to connecting or disconnecting cables. This is important to prevent dam- age to the unit itself as well as other connected equip- ment. 6.Handle cables carefully. Always plug and unplug cables including the AC cord by gripping the connector, not the cord. 7.Clean with a soft dr

15、y cloth. Never use solvents such as benzine or thinner to clean the unit. Wipe clean with a soft, dry cloth. 8.Always use the correct power supply. Make sure that the power supply voltage specified on the rear panel matches your local AC mains supply. Also make sure that the AC mains supply can deli

16、ver more than enough current to handle all equipment used in your system. Contents Controls and Functions . 2 Front Panel. 2 Rear Panel . 3 Modes: STEREO/PARALLEL/BRIDGE. 4 SPEAKER IMPEDANCE. 4 Caution for Speaker Connection . 5 Rack Mounting . 6 Mounting in an EIA standard rack . 6 Mounting four or

17、 fewer amps in an open-backed rack. 6 Mounting five or more amps, or when (even with four or fewer units) the back of the rack cannot be left open . 6 Portable Rack Mounting . 7 Positioning the Housed Amplifier. 7 Specifications . 8 General Specifications. 8 Block Diagram. 9 Dimensions . 9 Performan

18、ce Graphs. 10 Troubleshooting . 10 RadioFans.CN 收音机爱 好者资料库 2 Controls and Functions I Front Panel TEMP PROTECTION POWER ON OFF AB CLIP SIGNAL 61 234 5 dB?0?0 40 30 20 15 10 3 6 25 40 30 20 15 10 3 6 25 EEEngine 1 POWER switch and indicator This is the main POWER switch. Press to power ON the amplifi

19、er. Press again to power OFF. The POWER indicator lights up when the amplifier is powered ON. 2 TEMP indicator When the temperature of the heat sink exceeds 85 degrees Celsius, this indicator will light red. 3 PROTECTION indicator This red LED indicator lights up for approximately 3 seconds when the

20、 amplifier is powered ON, indicating that the soft-start protection system is working. No sound is output during soft-start up. If one of the protec- tion systems is activated during normal use, this indica- tor lights up and no sound is output. The speaker system is actually disconnected from the a

21、mplifier outputs when this indicator lights up. The protection systems are activated when overheating occurs or a DC voltage is present at the amplifier outputs. If the problem is cor- rected, the protection systems deactivate automatically, this indicator goes out, and normal amplifier operation is

22、 resumed. 4 CLIP indicators These red LED indicators light up when the respective channels output signal distortion exceeds 1% (i.e. clip- ping). Output signal clipping is usually due to excessive input signal levels. 5 SIGNAL indicators These green LED indicators light up when the respective channe

23、ls output signal exceeds 2 Vrms. This is equiva- lent to 1/2 watt into 8, 1 W into 4. 6 Volume controls These volume controls allow you to adjust the volume level in 31 steps in the range between dB and 0 dB. To fix the volume setting by protecting the controls, install the included security cover o

24、ver the controls and tighten the screws in the holes as shown below. dB?0?0 40 30 20 15 10 3 6 25 40 30 20 15 10 3 6 25 3 I Rear Panel INPUTSPEAKERS CHANNEL BCHANNEL A CHANNEL BCHANNEL A GG (BRIDGE) (PARALLEL) BRIDGE STEREO PARALLEL STEREO BRIDGE MAX. OUTPUT 450W/4 (STEREO) MAX. OUTPUT 900W/8 (BRIDG

25、E) (STEREO) 4-8/SP (BRIDGE) 8-16/SP 3214 3 SPEAKERS terminals For polarity in each mode, refer to the following dia- gram. STEREO, PARALLEL mode SPEAKERS CHANNEL BCHANNEL A STEREO BRIDGE BRIDGE mode SPEAKERS CHANNEL BCHANNEL A STEREO BRIDGE In BRIDGE mode, the (-) jacks of CHANNELS A and B are not u

26、sed. The minimum impedance for the connected speaker system is specified in “Speaker Impedance” on page 4. 4 GND terminals This is the grounding screw terminal. If hum or noise occurs, ground (earth) the unit via this jack, or try connecting it to the chassis of the mixer or preamp, etc. 1 INPUT ter

27、minals (CHANNEL A, B) Three types of balanced terminals for channels A and B are provided. Channel A input terminal is used in Bridge and Parallel mode. XLR-3-31 type connector They are wired pin 1ground, pin 2hot (+), and pin 3 cold (-). 12 3 Cold GroundHot Phone jack They are wired tiphot (+), rin

28、gcold (-), and sleeve ground. Ring SleeveTip Barrier strip Hot (+), Cold (-) and Ground (G). 2 STEREO/BRIDGE/PARALLEL switch This slide switch is used to set the amplifier operating mode: STEREO, BRIDGE or PARALLEL. For details on the functionality of each mode, refer to “Modes” on page 4. 4 I Modes

29、: STEREO/PARALLEL/BRIDGE BRIDGE mode In this mode, the CHANNEL A input signal will be output from the BRIDGE output jacks. In this case, use the front panel (channel) A volume control to adjust the volume. I SPEAKER IMPEDANCE In STEREO and PARALLEL modes, the minimum load (=speaker) impedance is 4.

30、In BRIDGE mode it is 8. Make sure that the impedance does not fall below this specified impedance. STEREO mode connections SPEAKERS CHANNEL BCHANNEL A BRIDGE STEREO PARALLEL STEREO BRIDGE MAX. OUTPUT 450W/4 (STEREO) MAX. OUTPUT 900W/8 (BRIDGE) + Set to STEREO Speaker System 4 min.4 min. PARALLEL mod

31、e connections SPEAKERS CHANNEL BCHANNEL A BRIDGE STEREO PARALLEL STEREO BRIDGE MAX. OUTPUT 450W/4 (STEREO) MAX. OUTPUT 900W/8 (BRIDGE) + Set to PARALLEL Speaker System 4 min.4 min. BRIDGE mode connections SPEAKERS CHANNEL BCHANNEL A BRIDGE STEREO PARALLEL STEREO BRIDGE MAX. OUTPUT 450W/4 (STEREO) MA

32、X. OUTPUT 900W/8 (BRIDGE) + Set to BRIDGE Speaker System 8 min. STEREO mode In this mode, channels A and B operate independently (as a conventional stereo amp). The CHANNEL A input signal will be output from the CHANNEL A output jacks, and the CHANNEL B input signal will be output from the CHANNEL B

33、 output jacks. PARALLEL mode In this mode, the CHANNEL A input signal will be output from the output jacks of both channels A and B. The CHANNEL B input jack is not used. The (channel) A and B volumes can be adjusted independently. 5 Caution for Speaker Connection 1.Turn off the POWER switch. 2.Remo

34、ve the cover attachment screw(s) and remove the protective cover from the speaker terminals. Screw 3.After removing approx. 10 mm of insulation from the ends of the speaker cables, pass the bare ends of the speaker wires through the holes in the corresponding speaker terminals and tighten the termin

35、als to securely clamp the wires. Refer to page 3 for speaker porality. 10 mm At this time make sure that the bare ends of the speaker cables do not extend from the terminals in such a way that they touch the chassis. Wire should not touch the chassis. 4.Reattach the protective cover over the speaker

36、 termi- nals. Speaker fuse The output capacity of your amplifier is very high: 460 W+460 W (8) in stereo and 1240 W (8) in monaural on the P4500; 340 W+340 W (8) in stereo and 880 W (8) in monaural on the P3200; 160 W+160 W (8) in stereo and 400 W (8) in monaural on the P1600. Be sure to use a speak

37、er system that has sufficient input capacity. If the input capacity of your speaker system is lower than the rated output of the power amplifier, you can protect your speakers by connecting a fuse serially between the speaker and amplifier as shown below. _ +_ + Power amplifierSpeaker system Fuse Us

38、e the following formula to determine the fuse capacity according to the speakers input capacity. Po = I R I = Po/R 2 P0 W : Speakers continuous input capacity (noise or RMS) R : Speakers nominal impedance I A: Required fuse capacity ex.)Speakers continuous input capacity : 100 W Speakers impedance :

39、 8 I = 100/8 In this example, the required fuse capacity is calculated as 3.5 A. Speaker cable If you use a long speaker cable, use as thick a cable as possible to prevent deterioration of the damping factor or power loss inside the cable. 6 Rack Mounting I Mounting in an EIA standard rack If multip

40、le high-power amp units are mounted in a rack with poor ventilation, the heat from the amps will cause the interior of the amp to become very hot, causing the performance of the amps to be impaired. When mounting amps in a rack, you must make provision for ventilation so that the heat can escape. Wh

41、en mounting amps in a rack, please attach ventilation panels above and below the amp to allow air circulation. When doing so, it is necessary for 35% or more of the entire surface area of a 1U size panel to be open. Air circulation will be even better if the top surface of the rack has ventilation o

42、penings. Ventilation panel Yamaha provides an optional 1U-size ventilation panel VP1. Unit: mm 480 44 I Mounting four or fewer amps in an open-backed rack Install the ventilation panel above the amps, as shown in the following figure. Ventilation panel (attach to the front or rear of the rack) TEMP

43、PROTECTION POWER ON OFF AB CLIP SIGNAL dB?0?0 40 30 20 15 10 3 6 25 40 30 20 15 10 3 6 25 EEEngine TEMP PROTECTION POWER ON OFF AB CLIP SIGNAL dB?0?0 40 30 20 15 10 3 6 25 40 30 20 15 10 3 6 25 EEEngine TEMP PROTECTION POWER ON OFF AB CLIP SIGNAL dB?0?0 40 30 20 15 10 3 6 25 40 30 20 15 10 3 6 25 EE

44、Engine I Mounting five or more amps, or when (even with four or fewer units) the back of the rack cannot be left open Install ventilation panels above and below each amp, as shown in the following figure. TEMP PROTECTION POWER ON OFF AB CLIP SIGNAL dB?0?0 40 30 20 15 10 3 6 25 40 30 20 15 10 3 6 25

45、EEEngine TEMP PROTECTION POWER ON OFF AB CLIP SIGNAL dB?0?0 40 30 20 15 10 3 6 25 40 30 20 15 10 3 6 25 EEEngine TEMP PROTECTION POWER ON OFF AB CLIP SIGNAL dB?0?0 40 30 20 15 10 3 6 25 40 30 20 15 10 3 6 25 EEEngine TEMP PROTECTION POWER ON OFF AB CLIP SIGNAL dB?0?0 40 30 20 15 10 3 6 25 40 30 20 1

46、5 10 3 6 25 EEEngine 7 I Portable Rack Mounting The amplifier intakes cool air through the front panel and exhausts warm air out the rear panel. When mounting amplifiers in a portable rack, make sure the rear panel is completely open for ventilation. Front Air intakeAir exhaust Completely open (Rear View)(Side View) INPUTSPEAKERS CHANNEL BCHANNEL A CHANNEL BCHANNEL A GG (BRIDGE) (PARALLEL) BRIDGE STEREO PARALLEL STEREO BRIDGE