Instruction/ maintenance manual of the product 945 Hafler
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Series 945 Preamp/Tuner.
NOTICE - IMPORTANT SAFETY INFORMATION RISK OF ELECTRIC SHOCK DO NOT OPEN WARNING: TO PREVENT FIRE OR SHOCK HAZARD, DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE.
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.
TABLE OF CONTENTS PERFORMANCE SPECIFICATIONS ............................................................................................... 4 General Information ........................................................................................
PERFORMANCE SPECIFICATIONS LINE AMPLIFIER (Measured at Line Out) HEADPHONE AMPLIFIER TUNER SECTION-FM TUNER SECTION-AM GENERAL INFORMATION All specifications are for 20 Hz - 20 kHz unless specified otherwise.
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.
, 16 15 16 15 RP P 14 14 P P 945 PREAMP/TUNER FRONT PANEL VIEW.
FRONT PANEL CALL-OUTS 1. POWER SWITCH 15. -lights amber when in READY mode. -lights green when in ON mode. 2. 3. INFRARED RECEIVER WINDOW MEMORY PRESETS (l-9) -press to store AM/FM stations l-9 into memory. (See #6) -press to recall AM/FM stations l-9 from memory.
LEFT CHANNEL VIDEO RECORD TAPE 1 A/V IN VIDEO IN SWITCHED AC LINE VOLTAGE LINE OUT +, ,+ M:%:R ,A, OUTLETS RATING OUT IN 3 2 1 3 1 1 ANTENNA -@@@@@@@@@@ @@@@@ BRACKET *@@@@Q@@@@ @ @@@@ RIGHT 1 O?JT It.
LEFI- CHANNEL VIDEO RECORD TAPE 1 A/V IN VIDEO IN LINE OUT +, ,+ Mtf?I::R +, SWITCHED AC LINE VOLTAGE OUTLETS RATING OUT IN 3 2 1 3 2 1 RIGHT I CHANNEL ObT Ikl Y I I A/V OUT CD FM ANT UNSWITCHED LINE .
PREAMP /TUNER REMOTE CONTROL 1. VOLUME -press left volume button for decreased volume. -press right volume button for increased volume. -pressing either volume button defeats MUTE. 2. TUNE -press left button to change tuner down in frequency. -press right button to change tuner up in frequency.
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ANTENNA CONNECTIONS INITIAL POWER- UP/MUTING SYSTEM AUDIO LINE LEVEL INPUTS AUDIO LINE LEVEL OUTPUTS VIDEO SWITCHING A simple "T" shaped dipole ribbon antenna has been provided for FM reception. Connect its leads to the rear panel terminals marked “FM 300 OHM”.
TAPE INPUTS and TAPE OUTPUTS The 945 incorporates two Tape Loops for use with audio tape decks or other input/output signal processors. Due to the great flexibility of connection and control, the Tape Loops are probably the most complicated portion of the 945 to understand and operate.
MUTE CONTROL VOLUME CONTROL AND VOLUME CONTROL INDICATOR BALANCE CONTROL MONO CONTROL HEADPHONE OUTPUT ~ The Headphone receptacle is a standard 1/4” stereo phone jack, with the tip of the plug as the left channel, the ring the right channel, and the barrel ground.
UP/DOWN TUNING and AUTO SELECTOR MEMORY PRESETS l-9 and +10 PRESET SHIFT (FRONT PANEL) MEMORY PRESET BUTTONS '1', ‘1 1', AND NEXT (REMOTE CONTROL) STORING STATIONS INTO MEMORY MONO CONTROL Pressing the left tuning button will change the station frequency down the band.
CIRCUIT DESCRIPTION REMOTE RECEIVER and CONTROL LOGIC AUDIO LINE LEVEL INPUT SELECTOR SYSTEM JFET BUFFER AND RECORD OUTPUT DRIVER VIDEO SWITCHING TAPE MONlTOR SWITCHING LINE AMPLIFIER TONE CONTROL SYSTEM MUTING SYSTEM The Remote Receiver circuitry decodes the infrared pulses received from the Remote Control via the front panel Infrared Receiver.
HEADPHONE AMPLIFIER AM/FM TUNER The Headphone Amplifier utilizes a separate special purpose operational amplifier to drive the high 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.
FM ANTENNA 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.
AM ANTENNA REMOTE CONTROL BATTERY REPLACEMENT CLEANING/ MAINTENANCE 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.
An important point after buying a device Hafler 945 (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 945 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 945 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Hafler 945 you will learn all the available features of the product, as well as information on its operation. The information that you get Hafler 945 will certainly help you make a decision on the purchase.
If you already are a holder of Hafler 945, 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 945.
However, one of the most important roles played by the user manual is to help in solving problems with Hafler 945. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Hafler 945 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
