SPECIFICATIONS
DESCRIPTION
INSTALLATION
RACK INSTALLATION
SHELF INSTALLATION
VENTILATION
ELECTRICAL
120 Volt, 50160 Hz Power Connections
240 Volt, 50160 H z Power Connections
Battery Connections
lnput Connections
Output Connections
Speaker Matching
Speaker Power Distribution
OPERATION
CONTROLS AND INDICATORS
SERVICE
ACCESS
ADJUSTMENT OF POWER DRIVER
BALANCE CONTROL
ADJUSTMENT OF OUTPUT "Q"BALANCE
CONTROLS
ASSEMBLY REPLACEMENTS
Fuses
Pilot Lamp
Power Driver PCB
RECOMMENDED SERVICE TECHNIQUES
Transistor Orientation
Replacing Power Transistors
Testing Transistors
Replacing PCB Components
Repairing Fractured or Damaged PCB
Conductor
PARTS LIST
DATA CONTENTS
Page
Figure 1.
3
Typical Power Output Versus Fre-
quency for 0.5% THD and 1% THD
4
(8-Ohm Load)
4
Figure
2.
Typical Frequency Response
Characteristics
Figure 3.
Typical % THD Versus Frequency
for 100-Watt Output
Figure 4.
Typical
put at 1000 Hz (8-Ohm Load)
Figure
5.
Front View With Hinged Panel Open
Figure 6.
Rear View of 15948 Power Amplifier
7.
Figure
Converting to 240V ac, 50/60 Hz
Operation
Figure 8.
Socket Wiring for Transformer-
Isolated lnput Using 15095A Line
Transformer
Table I.
Terminals and Applications of INPUT
Terminal Board
Table II.
Speaker Outputs
Figure 9.
Typical Solid-State Component
Configuration
Figure 10.
Component Locations Inside Main
Chassis
Component Locations on Rear of
Figure 11.
Chassis
Schematic (3D186 11). 15948 Power
Figure 12.
Amplifier
Figure 13.
Component Locations 130661-41,
Power Driver PCB Assembly
Graphics
%
THD Versus Wattage Out-
Page
3
3
3
3
4
5
6
6
6
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