Summary of the content on the page No. 1
Summary of the content on the page No. 2
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 product’s enclosure, that may RISK OF ELECTRIC SHOCK be of sufficient magnitude to constitute a risk of DO NOT OPEN electric shock to persons. The exclamation point within an equilateral WARNING: TO PREVENT FIRE OR triangle is intended to alert the user of the presence of important operating and
Summary of the content on the page No. 3
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. The power supply cord or plug has been damaged, or B. Objects have fallen, or liquid has been spilled into the equipment, or C. Th
Summary of the content on the page No. 4
TABLE OF CONTENTS 4 PERFORMANCE SPECIFICATIONS ............................................................................................... 5 General Information .................................................................................................................. INSTALLATION 5 Rackmounting ............................................................................................................................ Ventilation/Placement ..........................................
Summary of the content on the page No. 5
PERFORMANCE SPECIFICATIONS All specifications are for 20 Hz - 20 kHz unless specified otherwise. LINE AMPLIFIER FREQUENCY RESPONSE: +O.l dB (into 33,000 ohms) (Measured at BANDWIDTH: 10 Hz - 150 kHz, -3 dB, into 1 Ok ohm load Line Out) MAXIMUM OUTPUT: 5 volts RMS TOTAL HARMONIC DISTORTION AND NOISE: 0.02% @ 2 volts RMS SEI\ISITIVITY (For 0.5 volts RMS Output): 45 mV RMS SIGNAL TO NOISE RATIO (A-Weighted, relative to 2 volts RMS output): -100 dB INPUT IMPEDANCE: 22k ohms OUTPUT IMPEDANCE: 316 ohm
Summary of the content on the page No. 6
REMOTE CONTROLS: Up/Down Volume, Up/Down Tuning, Preset Next, Preset ‘1 ‘, Preset ‘11’: Audio/ Video Input Selectors, Tape 1, Tape 2/EPL, Power, AM/FM Selector, Tone In, Mute. CONVENIENCE OUTLETS: 120 VAC MODELS: 1 Polarized Unswitched, 2 Polarized Switched, 1 Grounded Switched 240 VAC MODELS: 1 Reverse-IEC Unswitched, 2 Reverse-IEC Switched PHYSICAL DIMENSIONS: 17” Wide x l l-3/5” Deep x 2-l/2” High (excluding feet); Faceplate 17” or 19” Wide 43.2 cm Wide x 29.5 cm Deep x 6.3 cm High (excluding
Summary of the content on the page No. 7
, 14 14 16 15 16 15 PP RP P 945 PREAMP/TUNER FRONT PANEL VIEW
Summary of the content on the page No. 8
FRONT PANEL CALL-OUTS 1. POWER SWITCH 15. VOLUME CONTROL INDICATOR -lights amber when in READY mode. -shows rotational position of VOLUME CONTROL. -lights green when in ON mode. -lights steady green for normal operation. -lights flashing green for MUTED operation. INFRARED RECEIVER WINDOW 2. 16. AUTO/MANUAL 3. MEMORY PRESETS (l-9) -press to change between AUTO and MANUAL modes of TUNING button. -press to store AM/FM stations l-9 into memory. (See #6) -in MANUAL mode, AUTO indicator in display wi
Summary of the content on the page No. 9
VIDEO RECORD TAPE 1 A/V IN VIDEO IN SWITCHED AC LINE VOLTAGE OUTLETS RATING LINE OUT +, ,+ M:%:R ,A, LEFT OUT IN 3 2 1 3 1 1 CHANNEL -@@@@@@@@@@ @@@@@ ANTENNA BRACKET *@@@@Q@@@@ @ @@@@ I I RIGHT 1 O?JT It!4 CHANNEL UNSWITCHED ’ LINE CORD ’ A/V OUT cL FM ,?r 4 YANT Y OUTLET CONNECTOR 75 OHM FM ANT TAPE 2/EPL 300 OHM 945 PREAMP /TUNER REAR PANEL VIEW 120 VAC VERSION
Summary of the content on the page No. 10
VIDEO RECORD TAPE 1 A/V IN VIDEO IN AC LINE VOLTAGE SWITCHED RATING OUTLETS +, ,+ Mtf?I::R +, LINE OUT LEFI- OUT IN 3 2 1 3 2 1 CHANNEL RIGHT I ObT Ikl CHANNEL I I UNSWITCHED LINE CORD A/V OUT CD FM ANT Y OUTLET CONNECTOR TAPE 2/EPL 300 OHM 945 PREAMPTTUNER REAR PANEL VIEW 240 VAC VERSION
Summary of the content on the page No. 11
PREAMP /TUNER REMOTE CONTROL 1. VOLUME 7. TAPE SELECTORS -press left volume button for decreased volume. -press to select TAPE 1 or TAPE 2/EPL. Button on front panel -press right volume button for increased volume. lights red to indicate selected function. (See text for important -pressing either volume button defeats MUTE. operating details.) 2. TUNE 8. POWER -press left button to change tuner down in frequency. -press to change between READY and ON mode. Power -press right button to change tun
Summary of the content on the page No. 12
co B I-- rJv1 i B i -’ ti, s I7 */vs I zc L L--lr----J L--lr----J ;; ] ] L--_-----___~f~~~~~~~lll L--_-----___~f~~~~~~~lll L-------- ---- ---------, , / ; 1 r----------m-- ------- ~, , I 5isE CMOS MoHo E!! AA I- VlMo i-------------------j m”-* - 945 PREAMP/TUNER FUNCTIONAL BLOCK DIAGRAM ONE CHANNEL SHOWN
Summary of the content on the page No. 13
ANTENNA A simple "T" shaped dipole ribbon antenna has been provided for FM reception. Connect its leads to the CONNECTIONS rear panel terminals marked “FM 300 OHM”. For best results, the “arms” of this antenna should be fully extended, and mounted flat against a wall or equipment cabinet. A “loop” type antenna has been provided for AM reception. It is to be connected to the rear panel terminals marked “AM ANT” and “GND”. This antenna is attached at one end by a snap-in hinge. As this antenna is
Summary of the content on the page No. 14
The 945 incorporates two Tape Loops for use with audio tape decks or other input/output signal TAPE INPUTS processors. Due to the great flexibility of connection and control, the Tape Loops are probably the most and TAPE complicated portion of the 945 to understand and operate. Therefore, a thorough reading of this section OUTPUTS is strongly recommended. Consultation of the Functional Block Diagram will aid in understanding the signal flow inside the unit. TAPE DECK CONNECTIONS: The Tape Inputs
Summary of the content on the page No. 15
Activating the Tone Controls may cause a slight change in tonal balance even when both Bass and Treble controls are in their center detented position, and therefore the Tone System should be disabled via the switch when no tone control action is desired. The tone controls also limit the total bandpass of the line amplifier. MUTE CONTROL The Mute control is for turning off the Line outputs, useful when it is desired to temporarily interrupt the signal to the amplifier. The Mute mode is active whe
Summary of the content on the page No. 16
UP/DOWN Pressing the left tuning button will change the station frequency down the band. Pressing the right button will change the station frequency up the band. TUNING and AUTO SELECTOR The Auto Selector controls whether the tuning buttons will change the station frequency by one channel spacing (Manual Mode), or automatically move to the next usable station (Auto Mode). The status of this mode is indicated in the display window by the logo “AUTO”. In most situations, the Auto Mode is most usef
Summary of the content on the page No. 17
CIRCUIT DESCRIPTION REMOTE The Remote Receiver circuitry decodes the infrared pulses received from the Remote Control via the and RECEIVER front panel Infrared Receiver. This decoded information is sent to the Control Logic, which controls all CONTROL internal signal routing and Front Panel indicators. The Control Logic also receives input commands from LOGIC the Front Panel buttons. AUDIO LINE The Control Logic creates digital codes fed to a CMOS-FET electronic selector switch. This arrangement
Summary of the content on the page No. 18
HEADPHONE The Headphone Amplifier utilizes a separate special purpose operational amplifier to drive the high AMPLIFIER current demands of headphone operation. This provides the extra power necessary for driving difficult headphone loads, and leaves the main signal path uncompromised for signals to power amplifiers. The Headphone jack is equipped with a sensing switch that automatically turns off the Line Output when headphones are plugged in. AM/FM TUNER Antenna signal input to the FM Tuner sec
Summary of the content on the page No. 19
WARNING: The use of ground adaptors (with the ground tab or wire of the adaptor disconnected) will eliminate the safety feature of the grounded power cord. This safety feature is intended to reduce the risk of electric shock-should an internal fault in the equipment result in an electrically “live” chassis. Therefore, this method of ground isolation should be employed only when When using a ground adaptor for absolutely necessary, rather than as a general practice. isolation, make sure that the
Summary of the content on the page No. 20
AM ANTENNA The loop antenna supplied will offer excellent reception in most situations. It is a directional antenna, requiring orientation perpendicular to the radio station’s transmitter. Because of its directional behavior, it will offer the quietest (least background noise) signal on high to medium strength stations, compared to a straight wire antenna. However, the loop antenna is not the most sensitive, and therefore may not satisfactorily receive medium to weak stations, especially in auto
