Sherwood AM 7040 Service Manual

Page 1

AM-7 040

STEREO POWER AMPLIFIER

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l CONTENTS

To Service Personnel ........................... 2 Mechanica| Parts List ........................... 14
Specifications .................................... 3 Exploded View of Cabinet & Chassis ......... 15
Electrical Parts List .............................. 4 Point to Point Wiring Diagram ( I ~11 ~lll) ...... 17
Top & Bottom View of P. C Boards. . . 7 Schematic Diagram .............. Separate Sheet
Block Diagram .................................. 13

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To Service Personnel

1. Critical Components Information.
The Amarked components on schematic diagram and parts list be replaced with the pans
having specifications equal to these originally installed.

2. Leakage Current Measurement(For 120V Version only).
When the service has been completed, make sure that all exposed conductive surfaces are
properly insulated from the power supply Circuits. '
- Leakage current meter should have an input impedance of 1500 ohms resistive shunted by
0.15M: capacitor,
- Leakage current shall not be exceed 0.5mA.

UNlT METER
UNDER TEST

@43-

WALL INSULATING TABLE
OUTLET

3. Turn the unit OFF, and disconnect the power supply cord during disassembly and replacement
of parts.

4. Wheh the service has been completed, be sure to check all protective device and spacings
before returning the unit to customer.

This symbol is intended to alert the user to the presence of uninsulated danr
gerous voltage" with In the product's enclosure that may be of sufficient magni~
tude to constitute a risk of electric shock hazard to persons.

6. This symbol is intended to alert the user to the presence of important operating
and maintenance(servicing) instructions In the literature accompanying the; appli-
ance.

7 Caution: To prevent electric shock do not use this(polarized) plug with an extension cord,
receptacle or other outlet unless the blades can be fully inserted to prevent blade
exposure.

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