Hafler 915 Stereo Amplifier User Manual


 
TABLE OF CONTENTS
PERFORMANCE SPECIFICATIONS
............................................................................................
4
General Information ...............................................................................................................
5
INSTALLATION
Rackmounting ........................................................................................................................
5
Ventilation/Placement ............................................................................................................
5
Line Voltage ...........................................................................................................................
5
OPERATION/CONNECTIONS
Power Cord Connection
........................................................................................................
5
Initial Power-Up/Muting
System ............................................................................................
5
Convenience Outlets
.............................................................................................................
6
Line Level Inputs ...................................................................................................................
6
Phono Section .......................................................................................................................
6
Front Panel View Diagram .....................................................................................................
7
Rear Panel View Diagram
.....................................................................................................
8
Tape
Input/Record Output .....................................................................................................
9
Tone
Controls/Tone Switch ...................................................................................................
9
Volume
Control
......................................................................................................................
9
Balance
Control
.....................................................................................................................
9
Out
1,
Out
2,
And Output Switch .........................................................................................
10
Headphone
Output ..............................................................................................................
10
CIRCUIT DESCRIPTION
Phono
Section
......................................................................................................................
10
Line
Level
Inpu?
Selector System .........................................................................................
10
J-FET
Buffer And Record Output Driver.. ............................................................................
11
Tape
Monitor Switching
........................................................................................................
11
Volume
And Balance Controls..
............................................................................................
11
Line Amplifier..
.....................................................................................................................
11
Tone
Control System
............................................................................................................
11
Muting
System .....................................................................................................................
11
Power Supply
.......................................................................................................................
11
Headphone
Amplifier ...........................................................................................................
12
ADDITIONAL INFORMATION
Installing
Phono Option .......................................................................................................
.12
Phono
Board Installation Diagram .......................................................................................
.13
Installing
Cartridge Loads ....................................................................................................
.14
Changing
Line Voltage Rating .............................................................................................
.14
Cartridge
Loads Installation Diagram ..................................................................................
.15
General Troubleshooting Hints ............................................................................................
.16
Ground Loops
......................................................................................................................
.17
Cleaning/Maintenance .........................................................................................................
.17
Functional
Block Diagram ....................................................................................................
.18
Main Board Parts List ..........................................................................................................
.19
Main Board Component Layout Diagram
............................................................................
.20
Main Board Circuit Schematic Diagram
...............................................................................
.21
Phono Board Parts List ........................................................................................................
.22
Phono Board Component Layout Diagram
..........................................................................
.23
Phono Board Circuit Schematic Diagram ............................................................................
.24
SERVICE POLICY AND LIMITED WARRANTY
.........................................................................
.25
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