Instruction/ maintenance manual of the product 9270 Hafler
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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 triang.
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.
TABLE OF CONTENTS PERFORMANCE SPECIFICATIONS .......................................................................................... 4 General Information .............................................................................................
PERFORMANCE SPECIFICATIONS GENERAL INFORMATION All specifications are for 20 Hz - 20 kHz, at full power into 8 ohms, unless specified otherwise. Power Rating: 9180: 9270: Rated THD: Full Power Bandwid.
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 holes are on standard EIA spacings.
LEFT/MONO GAIN POWER SWITCH UP - ON DOWN - OFF RACKMOUNT HOLES RIGHT RACK HANDLES (19” VERSION ONLY) GAIN (19” VERSION ONLY) 9180 / 9270 AMPLIFIER FRONT PANEL VIEW.
I MONO/STEREO SWITCH IN - MONO RI Gt OUT - - I STEREO IN AC LINE VOLTAGE RATING LINECORD CONNECTOR - T T - iT IT LEFT/MONO INPUT MONO+ OUTPUT RIGHT + - LEFT OUTPUT OUTPUT I !I 9180 / 9270 AMPLIFIER RE.
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. Connect these binding posts to the loudspeakers.
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.
ADDITIONAL INFORMATION LOUDSPEAKER LOAD IMPEDANCE CONSIDERATIONS CHANGING LINE VOLTAGE RATING ADJUSTlNG BIAS 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.
GENERAL TROUBLESHOOTING HINTS GROUND LOOPS WARNING! UNPLUG THE UNIT FROM AC POWER BEFORE ATTEMPTING THIS PROCEDURE. FAILURE TO DO SO CAN RESULT IN SEVERE ELECTRICAL SHOCK.
CLEANING/ MAINTENANCE 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.
DESIGNATOR 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 VR1 ,VR101 P1,P101 VALUE 47.5K 33.2K 47.
LEFT/MONO INPUT LEFT/MONO MONO/STEREO SWITCH RIGHT INPUT b LEFl- OUTPUT THERMAL - THERMAL SENSORS b PROTECTION - SYSTEM A SOFT TURN ON/OFF SYSTEM 9180 / 9270 FUNCTIONAL BLOCK DIAGRAM.
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, R23 (SEE F&b CHART) lRl5 RI7 1 1 d+HV 6 2: 2N7000 R40 T -a-*, I ZiRCUIT SCHEMATIC DIAGRAM RMSED 1 l/13/91 1 1 l---T-++'+Hv l---T-++'+Hv (SEE FL% CHART) R201 jl5V +HV- ; - 7.5K CR201 1 N5245>’ R210 68.1 K 33.2K $ C20, ::a R212 0.01 .
NOTE!3 UNLESS SPECIFIED OTHERWISE 1. ALL RESISTORS IN OHMS 2. ALL CAPACITORS IN MICROFARADS 3. COUPONENT DESIGNATORS: l-99: LEFT CHANNEL 101-199: RIGHT CHANNEL 201-299: COMMON PARTS 301-399: CHASSIS/POWER SUPPLY 4. Ql7/Q117 & Q20/Q120 NOT PRESENT ON SERIES 9180 5.
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.
An important point after buying a device Hafler 9270 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Hafler 9270 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Hafler 9270 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Hafler 9270 you will learn all the available features of the product, as well as information on its operation. The information that you get Hafler 9270 will certainly help you make a decision on the purchase.
If you already are a holder of Hafler 9270, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Hafler 9270.
However, one of the most important roles played by the user manual is to help in solving problems with Hafler 9270. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Hafler 9270 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
