Scott 460A Service Manual

Page 1

Service Manual
W Mmfifius

460A/480A00

m SCOTT;

The Name to listen to.

Page 2

5k ,, a, dummy 4

CONTENTS

Specifications .............. I ............... 3
Functional Block Diagram .................... 4
Level Diagram ............................. 5
Circuit Description .......................... 5
Adjustment Procedure ........................ 7
Exploded Vielw ............................ 9
Schematic .................... ............ 1 1
Parts Location Diagram . . 13
Replacement Parts List 15

CAUTION NOTICE

The following safety precautions must be followed to assure

continued reliability and safety against fire and shock hazard:

]. Replacement parts used during servicing of this appliance
must have identical characteristics as those offered and
recommended by H. H. Scott, Inc.

2. A dielectric test is to be performed on each appliance
following the re-assembly and before returning the unit to
the custmer.

3. The dielectric test to be performed on H. H. Scott, lnc.
electric components serviced in the United States and
Canada for use in these countries shall consist of not less
than the following:

l) A dielectric tester designed to supply not less than 1100
volts at 60 Hz and employing leakage current indi-
cator(s), is to be used. -

2) The tester is to be connected per the instructions en-
closed with the instrument, or as follows:

a. The tester is connected to the power line receptacle
and the power switch is turned on.

b. Sufficient time is allowed for the tester supply to
stabilize and then the output voltage is adjusted for
1080V.

c. Leads of the tester, usually marked GND and HV,
are connected between chassis ground and both
blades of the male plug of the power cord.

d. Switch tester to test and observe leakage indicator.
Leakage current must not exceed 0.5 mA.

* Dielectric tests made by service personnel in countries other
than USA and Canada must use test equipment and pro-
cedures specified by the safety agency sewing that country.

..;.'.Ls