Hafler-9270-pwr-sm维修电路原理图.pdf

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1、RadioFans.CN 收音机爱 好者资料库 Series 9180/9270 Power Amplifier NOTICE - IMPORTANT SAFETY INFORMATION WARNING: TO PREVENT FIRE OR SHOCK HAZARD, DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE. The lightning flash with arrowhead symbol within an equilateral triangle is intended to alert the user to the pre

2、sence of uninsulated “dangerous voltage” within the products enclosure, that may be of sufficient magnitude to constitute a risk of electric shock to persons. The exclamation point within an equilateral triangle is intended to alert the user of the presence of important operating and mainte- nance (

3、servicing) instructions in the literature accompanying the appliance. 1 .READ INSTRUCTIONS All the safety and operating instructions of your Hafler equipment should be read before power is applied to the equipment. 2 .RETAIN OWNERS MANUAL These safety and operating instructions should be retained fo

4、r future reference. 3 .HEED WARNINGS All warnings on the equipment and in the operating instructions are important and should be followed. 4 .FOLLOW INSTRUCTIONS All operating and use instructions are important and should be followed. 5. HEAT The equipment should be kept away from areas of high temp

5、erature, such as heater vents, radiators, stoves/ovens, fireplaces, etc. 6 .VENTILATION The equipment should be used in an area suitable for proper ventilation. Care should be taken not to impede airflow in and around the cabinet. Do not mount on a carpeted shelf or in a sealed enclosure. Allow for

6、proper clearance above the equipment. 7 .WATER AND MOISTURE The equipment should not be used in or around water, such as a bathtub, sink, or swimming area. Also, the equipment should not be used in areas prone to flooding, such as a basement. a .a .POWER SOURCES The equipment should be connected onl

7、y to a power source of the same voltage and frequency as that listed on the rear panel above the power cord entry point. 9 .POWER CORD PROTECTION Power cords should be arranged so that they do not interfere with the movement of objects in the room: people, fan blades, utility carts, etc. Also, care

8、should be taken that the cord is not pinched or cut, and placed so that it is not in danger of being pinched or cut, as in under a rug, around a tight corner, etc. 10. POWER CORD GROUNDING The power supply cord is of a three wire grounded type, designed to reduce the risk of electric shock sustained

9、 from a live cabinet. It is assumed to be of suitable length for most uses of the equipment. The use of extension cords and power strips is discouraged unless they are of suitable rating to deliver the required total current for safe operation of all connected equipment. Furthermore, extension cords

10、 or power strips must provide the same three wire grounded connection. It is important that the blades of the equipments plug be able to fully insert into the mating receptacle. Never remove the round grounding pin on the plug in an attempt to mate to a two wire ungrounded receptacle: use a groundin

11、g adaptor with the grounding tab or wire suitably connected to earth ground. -1- RadioFans.CN 收音机爱 好者资料库 11. NON-USE PERIODS During periods of extended non-use, the power cord should be unplugged from the power source. 12. CLEANING The equipment should be cleaned only as detailed in the operating in

12、structions. 13.OBJECT AND LIQUID ENTRY Care should be taken so that objects and/or liquids, such as cleaning fluids or beverages, are not spilled into the enclosure of the equipment. 14. DAMAGE REQUIRING SERVICE Hafler equipment should be serviced by qualified service personnel when: A. The power su

13、pply cord or plug has been damaged, or B. Objects have fallen, or liquid has been spilled into the equipment, or C. The equipment has been exposed to rain, or D. The equipment does not appear to operate normally or exhibits a marked change in performance, or E. The equipment has been dropped, or the

14、 enclosure has been damaged. 15. SERVICING The user should not attempt to service the equipment beyond that which is described in the operating instructions. All other service should be referred to qualified service personnel. 16. CARTS AND STANDS The equipment should be used with carts or stands on

15、ly of sufficient strength and stability for the use intended. An equipment and cart combination should be moved with care. Quick stops and starts, excessive force, and uneven surfaces may cause the equipment and cart combination to topple. -2- RadioFans.CN 收音机爱 好者资料库 TABLE OF CONTENTS PERFORMANCE SP

16、ECIFICATIONS . 4 General Information . 4 INSTALLATION Rackmounting.5 Ventilation/Placement. . 5 Line Voltage. 5 OPERATION/CONNECTIONS Power Cord Connection/Power Switch. . 5 Inputs . 5 Front Panel View Diagram. . 6 Rear Panel View Diagram . 7 Outputs.8 Gain Controls. . 8 Mono/Stereo Switching. 8 Sof

17、t Turn-On System . 8 Thermal Protection System . 8 CIRCUIT HIGHLIGHTS . 9 ADDITIONAL INFORMATION Loudspeaker Load Impedance Considerations.10 Changing Line Voltage Rating.10 AdjustingBias . 10 General TroubleshootingHints . 11 GroundLoops . 1 1 Cleaning/Maintenance . 12 Parts List. . 12 Functional B

18、lock Diagram. . 14 Component Layout Diagram. . 15 Circuit Schematic Diagram . 17 SERVICE POLICY AND LIMITED WARRANTY. 19 -3- RadioFans.CN 收音机爱 好者资料库 PERFORMANCE SPECIFICATIONS GENERAL INFORMATION All specifications are for 20 Hz - 20 kHz, at full power into 8 ohms, unless specified otherwise. Power

19、Rating: 9180: 9270: Rated THD: Full Power Bandwidth: Signal to Noise Ratio: Input Impedance: Input Sensitivity: 9180: 9270: Damping Factor: Slew Rate: Controls: Inputs: outputs: Power Consumption: Size: Weight:9180: 9270: 105 watts per channel (8 ohms) 150 watts per channel (4 ohms) 300 watts mono (

20、8 ohms) 135 watts per channel (8 ohms) 200 watts per channel (4 ohms) 400 watts mono (8 ohms) less than 0.025%, typically 0.005% at 1 kHz 0.3 Hz to 116 kHz greater than 100 dB, unweighted 47,000 ohms 1.4 volts RMS 1.6 volts RMS 300 to 1 kHz, 200 to 10 kHz 50 V/uS Power Switch, Left/Right Gain Contro

21、ls, Mono/Stereo Switch Right and Left/Mono RCA jacks Right, Left, and Mono 5-Way Binding Posts 100 watts quiescent, 1200 watts maximum 17”(W) x 12.5”(D) w3.5”(H) excluding feet, faceplate 17” or 19”(W) 43.2cm(W) x 31.7cm(D) x 8.9cm(H) excluding feet, faceplate 43.2cm or 48.3cm(W) 33 Ibs., 15 kg, net

22、. 35 Ibs., 15.9 kg, net. -4- RadioFans.CN 收音机爱 好者资料库 INSTALLATION RACK- MOUNTING VENTILATION/ PLACEMENT LINE VOLTAGE The 9180/9270 Amplifier is supplied in either a 17” Black Version, or a 19” Silver Version. The 19” model has rackmounting holes provided for installation in equipment racks. The hole

23、s are on standard EIA spacings.Due to conflict with adjacent equipment, it may be advisable to remove the four rubber feet from the bottom of the unit. The feet may be removed from the outside, with no dis-assembly of the chassis necessary. The 9180/9270 Amplifier can produce considerable heat durin

24、g normal operation. The amplifier should be placed on a hard, smooth surface to allow air to circulate beneath the unit. Additionally, allow at least one inch of free space on either side, and several inches above and behind the amplifier to allow air circulation around the heatsinks. This is partic

25、ularly important when the unit is installed in a closed cabinet. In applications where the amplifier is driving low impedance and/or low efficiency loudspeakers at high levels, thermal shutdown may occur if inadequate ventilation is provided. If this occurs, it may be necessary to move the amplifier

26、 to a location with better free air circulation. The amplifier should be located at least several inches away from sensitive components, (such as preamplifiers, tuners, CD players, turntables, etc.) due to the possibility of audible hum or buzz from magnetic radiation. The 9180/9270 Amplifier is con

27、figurable for either 100, 120, 220 or 240 volt operation. This is accomplished by moving the Voltage Selector on the printed circuit board. The procedure is detailed in the section “CHANGING LINE VOLTAGE RATING”. Make sure that the unit is configured for your local AC line voltage before attempted u

28、se. The configuration is labelled directly above the power cord connector. OPERATION/CONNECTIONS POWER CORD CONNECTION/ POWER SWITCH INPUTS Units wired for 100, 220 and 240 VAC are supplied without power cords. Local agents will supply cords with male connectors appropriate to the local standard. Un

29、its wired for 120 VAC are supplied with a detachable AC power cord. The female connector plugs into the receptacle provided on the rear panel. This power cord is a standard IEC Type 320, 3-wire, 16 gauge assembly. Should replacement ever be necessary, be sure to replace it with an identical cord. Ne

30、ver remove the grounding pin from the male end of the cord. In applications where a grounded outlet is not available, a ground adaptor should be employed, with the ground tab or wire of the adaptor connected to a suitable earth ground. The AC power cord of the amplifier must be connected to a recept

31、acle capable of delivering a minimum of 1200 watts. The convenience outlets of some preamplifiers are not rated for this power level. Before connecting the amplifier, be sure to check the rating of such outlets, and take into account the power consumption of any other connected components to determi

32、ne the total maximum power consumption. If the amplifier is connected to a component with a switched convenience outlet, then the amplifiers Power Switch may be left ON at all times, and the power controlled by the switched outlet. If the amplifier is connected to an unswitched outlet, then the ampl

33、ifiers power should be controlled by the front panel Power Switch. All input connections to the amplifier must be performed with the amplifier off! The left and right audio inputs to the amplifier are via standard RCA jacks.In addition to the printed labelling above the jacks, the channels are ident

34、ified by RED for right channel, and WHITE for left channel. Connect these jacks to the output of the preamplifier or other signal source. When operating the amplifier in the Mono Mode, only the left channel input should be used. -5- RadioFans.CN 收音机爱 好者资料库 IEC Type 320, 3-wire, LEFT/MONO GAIN POWER

35、SWITCH U P - O N DOWN - OFF RACKMOUNT HOLESRIGHTRACK HANDLES (19” VERSION ONLY)GAIN(19” VERSION ONLY) 9180 / 9270 AMPLIFIER FRONT PANEL VIEW RadioFans.CN 收音机爱 好者资料库 I MONO/STEREO SWITCH IN -MONO RIGt O U T - - I STEREO IN AC LINE VOLTAGE RATING LINECORD CONNECTOR -T T- iT IT LEFT/MONO INPUT MONO+ OU

36、TPUT RIGHT + - LEFT OUTPUT OUTPUT I!I 9180 / 9270 AMPLIFIER REAR PANEL VIEW RadioFans.CN 收音机爱 好者资料库 OUTPUTS I All output connections to the amplifier must be performed with the amplifier off! The left and right audio outputs from the amplifier are via standard 5-way type, 3/4” spacing, binding posts

37、. Connect these binding posts to the loudspeakers. The amplifiers binding posts will accept single or dual banana plugs, spade lugs, pin plugs, or bare wires. If using bare wires, it is recommended that the ends of the wire be tinned with solder so that no stray strands can cause a short circuit to

38、the chassis or adjacent terminals. To ensure proper speaker phasing and frequency response, be sure to connect each respective amplifier RED (+) terminal to the speaker RED (+) terminal, and the amplifier BLACK (-) terminal to the speaker BLACK (-) terminal. The polarity symbols (+/-) for Stereo Mod

39、e are labelled below the amplifiers binding posts. For operation in the Mono Mode, a single loudspeaker should be connected to the two RED binding posts only. No connection is made to the amplifiers BLACK binding posts. Connect the speakers RED (+) terminal to the amplifiers RED terminal labelled (+

40、), and the speakers BLACK (-) terminal to the amplifiers RED terminal labelled (-). The polarity symbols (+/-) for the Mono Mode are labelled above the amplifiers binding posts. GAIN CONTROLS MONO/ STEREO SWITCHING SOFT TURN- ON/OFF SYSTEM THERMAL PROTECTION SYSTEM The 9180/9270 Amplifier is equipped with front panel mounted Gain Controls. These controls may be used to attenuate the input signal to the amplifier. The maximum clockwise position of these controls applies the full input signal to the amplifier. Intermediate positions of these controls will partially attenuate the signal, and the