Hafler 945 User Manual

Series 945 Preamp/Tuner

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

RISK OF ELECTRIC SHOCK

DO NOT OPEN

voltage” within the product’s 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.

1.

READ INSTRUCTIONS

The exclamation point within an equilateral
triangle is intended to alert the user of the
presence of important operating and mainte­nance (servicing) instructions in the literature
accompanying the appliance.

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 for 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 temperature, 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 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.

8. POWER SOURCES

The equipment should be connected only 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 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 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 or power strips must provide the same three wire grounded connection.’ It is

important that the blades of the equipment’s plug be able to fully insert into the mating receptacle. Never defeat the
grounding connection on the plug in an attempt to mate to a two wire ungrounded receptacle: use a grounding adaptor
with the grounding tab or wire suitably connected to earth ground.

11. NON-USE PERIODS
During periods of extended non-use, the power cord should be unplugged from the power source.

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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
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.

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 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 only 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.

17. POWER LINES
An outdoor antenna should be located away from power lines.

into the enclosure

18. OUTDOOR ANTENNA GROUNDING

If an outside antenna is to be used with the Hafler Tuner, be sure that the antenna system is grounded so as to provide
some protection against voltage surges and built up static charges. Section 810 of the National Electrical Code, ANSI/
NFPA No. 70-l 984, provides information concerning supporting structure, grounding of the lead-in wires to an antenna
discharge unit, size of grounding conductors, location of antenna discharge unit, connections to grounding electrodes, and
requirements for the grounding electrode. See Figure 1.

FIGURE 1

Wire

Antenna

Discharge Unit

(NEC Section 81 O-20)

Grounding Conductors

(NEC Section 81 O-21 )

/,,“;

Electrode Svstem =
(NEC Art

250,

Part H)

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TABLE OF CONTENTS

PERFORMANCE SPECIFICATIONS

General Information ..................................................................................................................

INSTALLATION

Rackmounting ............................................................................................................................

Ventilation/Placement ................................................................................................................

Line Voltage ...............................................................................................................................

OPERATION/CONNECTIONS

Power Cord Connection ............................................................................................................

Convenience Outlets ................................................................................................................

Front Panel ViewDiagram ........................................................................................................

Rear Panel View Diagram

Remote Control Diagram .........................................................................................................

Functional Block Diagram ........................................................................................................

Antenna Connections .............................................................................................................

Initial Power-Up/Muting System ..............................................................................................

Preamplifier Section

Audio Line Level Inputs ..........................................................................................................

Video Switching ......................................................................................................................

Tape Inputs and Outputs .........................................................................................................

Tone Controls and Tone In/Out .............................................................................................. 13

Mute Control ............................................................................................................................

Volume Control and Volume Control Indicator ........................................................................

Balance Control .......................................................................................................................

Mono Control ...........................................................................................................................

Headphone Output ................................................................................................................. 14

AM/FM Tuner Section

AM/FM Selector ................................................................................................................................

Up/Down Tuning and Auto Selector ....................................................................................... 15

Memory Presets
Memory Preset Buttons
Storing Stations into Memory..

Mono Control ...........................................................................................................................

l-9 and +10

'1', ’

...............................................................................................

........................................................................................................

Preset Shift (Front Panel) ........................................................

1 1'

and Next (Remote Control) .................................................. 15

................................................................................................

14

4

5

5
5
5

5
5
6

8
10
11

12
12

12
12

13

14
14
14
14

15
15

15

CIRCUIT DESCRIPTION

Line Level Input Selector System .........................................................................................

JFET Buffer And Record Output Driver

Tape Monitor Switching .......................................................................................................... 16

Volume And Balance Controls ..............................................................................................

Line Amplifier

Tone Control System ..............................................................................................................

Muting System

Headphone Amplifier ..............................................................................................................

AM/FM Tuner ...........................................................................................................................

ADDITIONAL INFORMATION

General Troubleshooting Hints ...............................................................................................

Ground Loops ..........................................................................................................................

FM Antenna .............................................................................................................................

AM Antenna .............................................................................................................................

Remote Control Battery Replacement ....................................................................................

Cleaning/Maintenance ............................................................................................................

SERVICE POLICY AND LIMITED WARRANTY

...........................................................................................................................

........................................................................................................................

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..................................................................................

.............................................................................

16

16

16

16
16
16
17

17

17

17

18

19
19
19

19

PERFORMANCE SPECIFICATIONS

LINE AMPLIFIER

(Measured at

Line Out)

HEADPHONE

AMPLIFIER

All specifications are for 20 Hz - 20
FREQUENCY RESPONSE:

BANDWIDTH: 10 Hz
MAXIMUM OUTPUT: 5 volts RMS
TOTAL HARMONIC DISTORTION AND NOISE: 0.02% @ 2 volts RMS
SEI\ISITIVITY
SIGNAL TO NOISE RATIO (A-Weighted, relative to 2 volts RMS output): -100

INPUT IMPEDANCE: 22k ohms
OUTPUT IMPEDANCE: 316 ohms
TONE CONTROLS: Bass:

MAXIMUM OUTPUT: 4 volts RMS into 150 ohm load
OUTPUT IMPEDANCE: 150 ohms

-

150 kHz, -3 dB, into 1 Ok ohm load

(For 0.5 volts RMS Output): 45 mV RMS

+O.l dB (into 33,000 ohms)

fl6 dB

Treble:

kHz

unless specified otherwise.

@ 20 Hz, moving inflection, variable turnover

+14 dB

@ 20 kHz, shelving @ 5 kHz, fixed turnover

dB

TUNER

SECTION-FM

TUNER

SECTION-AM

GENERAL

INFORMATION

IHF (USABLE) SENSITIVITY: Mono: 6.5
SIGNAL STRENGTH FOR 50

CAPTURE RATIO: 1.5
AM SUPPRESSION: 60
ALTERNATE CHANNEL SELECTIVITY: 63
TOTAL HARMONIC DISTORTION AND NOISE @ 1 kHz: Mono: 0.08%, Stereo: 0.3%

dB

SEPARATION: 40

SIGNAL TO NOISE RATIO @ 65

SENSITIVITY: 350 uV/m

SELECTIVITY: 27

SIGNAL TO NOISE RATIO: 60

AUDIO INPUTS: Tape 1, Tape 2/EPL,

AUDIO OUTPUTS: Line Out, Record

@ 1

dB

dB

dB

dB

QUIETING: Mono: 11

kHz

dBf:

dB

dBf,

Stereo: 12 dBf

dBf,

Stereo: 34.5 dBf

dB

Mono: 75 dB, Stereo: 70

AV1,

AV2, AV3, CD

1,

Record 2/EPL, AV, Headphone

dB

VIDEO INPUTS: Video

VIDEO OUTPUTS: Monitor, Record

FRONT PANEL CONTROLS: Power, Tuner Memory Presets, Tuner Preset Shift, AM/FM Selector,

Tuner Memory, Mono, Tone In, Volume, Balance, Bass, Treble, Tuner Auto/Manual, Up/Down Tuning,

Tape 1, Tape 2/EPL, Audio/Video Input Selectors.

1,

Video 2, Video 3

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1

IEC Type 320, 3-wire, 16

INSTALLATION

REMOTE CONTROLS: Up/Down Volume, Up/Down Tuning, Preset Next, Preset ‘1 ‘, Preset ‘11’: Audio/

2/EPL,

Video Input Selectors, Tape 1, Tape
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:

l l-3/5”

17” Wide x

43.2 cm Wide x 29.5 cm Deep x 6.3 cm High (excluding feet); Faceplate 43.2 cm or 48.3 Wide
POWER CONSUMPTION (Excluding Convenience Outlets): 20 watts Max.

Deep x

2-l/2”

High (excluding feet); Faceplate 17” or 19” Wide

Power, AM/FM Selector, Tone In, Mute.

RACKMOUNTING

VENTILATION/

PLACEMENT

LINE

VOLTAGE

The 945

has rackmounting holes provided for installation in equipment racks. The holes are on standard EIA

spacings, though the faceplate height is not standard EIA size.
The 945 produces very little heat during operation, and therefore requires no special considerations for

ventilation. The
contain large power transformers (such as power amplifiers), due to the possibility of audible hum or buzz
from magnetic radiation.

The 945
the unit is configured for your local AC line voltage before attempted use. The configuration is labelled
directly above the power cord entry point.

Preamp/Tuner

preamp/tuner

Preamp/Tuner

OPERATION/CONNECTIONS

POWER CORD

CONNECTION

Units wired

connectors appropriate to the local standard.

Units 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
gauge assembly. Should replacement ever be necessary, be sure to replace it with an identical cord.

Never remove the grounding pin from the male end of the cord. In applications where a grounded wall
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.

for 240

is supplied in either a 17” Black Version, or a 19” Silver Version. The 19” model

should be located at least several inches away from components that

is available in either 120 VAC or 240 VAC,

VAC are supplied without AC power cords. Local agents will supply cords with male

50/60

Hz versions . Make sure that

320, 3-wire,

16

CONVENIENCE

OUTLETS

Units wired for 720 VAC have a total of four outlets for connection of associated components. The
polarized Unswitched Outlet is powered at all times, which should generally be used for a turntable or

tape deck. The remaining three Switched Outlets (one grounded, two polarized) are powered when the

Power Switch is engaged, as indicated by the switch’s green light. The grounded outlet is provided for
equipment requiring a grounded connection.

Units wired for 240 VAC have a total of three reverse-IEC outlets for connection of associated com­ponents. The Unswitched Outlet is powered at all times, which should generally be used for a turntable
or tape deck. The remaining two Switched Outlets are powered when the Power Switch is engaged, as
indicated by the switch’s green light.

for

all

models, the maximum power available from the Unswitched Outlet is 200 watts. The maximum
total power available from the Switched Outlets is 800 watts. This total power may be drawn from a single
outlet, or a combination of outlets. Since some power amplifiers consume more than 800 watts at

maximum output, check the power amplifier’s rating before connecting to these convenience outlets.

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