Series 9180/ 9270 Power Amplifier
NOTICE - IMPORTANT SAFETY INFORMATION The lightning flash with arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of uninsulated “dangerous voltage” within the products enclosure, that may be of sufficient magnitude to constitute a risk of electric shock to persons. WARNING: TO PREVENT FIRE OR SHOCK HAZARD, DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE.
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 instructions. 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.
TABLE OF CONTENTS PERFORMANCE SPECIFICATIONS .......................................................................................... General Information .............................................................................................................. INSTALLATION Rackmounting.. ...................................................................................................................... 4 4 Line Voltage.. .............................................................................
PERFORMANCE SPECIFICATIONS All specifications are for 20 Hz - 20 kHz, at full power into 8 ohms, unless specified otherwise. GENERAL INFORMATION Power Rating: 9180: 105 watts per channel (8 ohms) 150 watts per channel (4 ohms) 300 watts mono (8 ohms) 9270: 135 watts per channel (8 ohms) 200 watts per channel (4 ohms) 400 watts mono (8 ohms) Rated THD: less than 0.025%, typically 0.005% at 1 kHz Full Power Bandwidth: 0.
INSTALLATION RACKMOUNTING VENTILATION/ PLACEMENT 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 holes 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.
LEFT/MONO GAIN RACKMOUNT HOLES (19” VERSION ONLY) POWER SWITCH UP - ON DOWN - OFF RIGHT GAIN 9180 / 9270 AMPLIFIER FRONT PANEL VIEW RACK HANDLES (19” VERSION ONLY)
MONO/STEREO SWITCH RI Gt iT IN - MONO O U T - S T E R E O I N IT AC LINE VOLTAGE RATING LEFT/MONO INPUT - II - TT LINECORD CONNECTOR I!I MONO+ OUTPUT + - RIGHT LEFT OUTPUT OUTPUT 9180 / 9270 AMPLIFIER REAR PANEL VIEW
OUTPUTS All output connections to the amplifier must be performed with the amplifier off! I 3/4"3/4” spacing, The left and right audio outputs from the amplifier are via standard 5-way 5-waytype, type, spacing, binding posts. Connect these binding posts to the loudspeakers. The amplifier’s binding posts will accept single or dual banana plugs, spade lugs, pin plugs, or bare wires.
CIRCUIT HIGHLIGHTS The input stage of the 9180/9270 Amplifier utilizes four low-noise, High-g, JFET’s (high transconductance junction field-effect transistors), in a fully complimentary, symmetric configuration. This circuit configuration results in excellent front-end headroom and a simple, straightforward connection to the remainder of the circuitry.
ADDITIONAL INFORMATION LOUDSPEAKER LOAD IMPEDANCE CONSIDERATIONS The 9180/9270 Amplifier is suitable for use with a wide variety of loudspeaker types and load impedances. Though not rated for impedances below 4 ohms, the amplifier is capable of driving lower impedances. Operation at low impedances is limited by the thermal dissipation capacity of the heatsinks and the airflow around the unit.
WARNING! UNPLUG THE UNIT FROM AC POWER BEFORE ATTEMPTING THIS PROCEDURE. FAILURE TO DO SO CAN RESULT IN SEVERE ELECTRICAL SHOCK. REQUIRED TEST EQUIPMENT: Milliammeter capable of measuring at least 300 mA. 1) Remove the top cover by removing the seven allen head screws (three on each side, one at rear center). 2) Using the diagram “Component Layout” as a guide, find the fuses labelled F1 and F2 for the left channel, or F1 01 and F102 for the right channel.
It may be necessary to use additional adaptors on other grounded components if more than two components are earth grounded. (In other words, only one earth ground per system should exist.) Another potential source of multiple earth grounds is from coaxial antenna or cable service feeds for FM or video sources, which usually are (and should be) earth grounded. The ground adaptor(s) should cure this grounding problem as well.
DESIGNATOR VALUE PART NUMBER DESIGNATOR VALUE PART NUMBER R33,R133 R34,R134 R35,R135 R36,R136 R37,R137 R38,R138 R39,R139 R40,R140 R41,R141 R42,R142 R43,R143 R44,R144 R45,R145 R46,R146 R47,R147 R201 R202 R203 R204 R205 R206 R207 R208 R209 R210 R211 R212 R213 47.5K 33.2K 47.5K 100 100 100 100 15K 10,5W, Wirewound 1K 4.75M 1M 1M 1M 1M 7.5K, .5 W, Carbon 7.5K, .5 W, Carbon 100K 10K 18.2K 332K 18.2K 332K 1K 68.1K 33.2K 33.2K 47.
LEFT/MONO INPUT LEFT/MONO b MONO/STEREO SWITCH RIGHT INPUT THERMAL SENSORS b THERMAL PROTECTION SYSTEM SOFT TURN ON/OFF SYSTEM A 9180 / 9270 FUNCTIONAL BLOCK DIAGRAM LEFlOUTPUT
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R23 lRl5 (SEE F&b C H A R T ) d+HV RI7 1 1 , 2: 6 2N7000 T R40 -a-*, I (SEE FL% C H A R T ) ZiRCUIT SCHEMATIC DIAGRAM R M S E D 1 l/13/91 11 l---T-++'+Hv R201 +HV7.5K ; jl5V - CR201 1 N5245>’ R210 68.1 K R212 33.2K $ C20, ::a 0.01 .’ b TO R. CH. @I + TO L. CH.
NOTE!3 UNLESS SPECIFIED OTHERWISE 1. ALL RESISTORS IN OHMS R33 47.5K 2. ALL CAPACITORS IN MICROFARADS 3. COUPONENT DESIGNATORS: l - 9 9 : LEFT C H A N N E L 101-199: RIGHT CHANNEL 2 0 1 - 2 9 9 : C O M M O N PARTS 301-399: CHASSIS/POWER 7; J101 RIGHT INPUT SUPPLY 4 . Ql7/Q117 & Q20/Q120 N O T P R E S E N T O N SERIES 9180 5. LEFT 6. CHANNEL ONLY SHOWN STEREO/MONO SWITCH SHOWN IN STEREO R34 33.2K 7. VOLTAGE SELECTOR SHOWN IN 1OOV POSITION 6 .
SERVICE POLICY AND LIMITED WARRANTY If you encounter any difficulty or have any question concerning your 9180/9270 Amplifier, please call our Customer Service Department weekdays, 8 a.m. to 3:30 p.m., Mountain Standard Time, at 602-967-3565. Should you have any doubts as to whether the amplifier is malfunctioning and requires service, please call us before sending in for repair. All units being returned (regardless of warranty status) must receive a Return Authorization (RA) number.
