Sansui AU-7700 - Page 2

GAU
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This
service
manual
is
designed
for
service
engineers
to
repair,
arCjust,
maintain
and
order
the
replacement
parts
of
the
A
tJ-7700
correctly.
When
ordering
the
parts,
use
the
stock
numder
and parts
name
speci-
fically
referring
to
the
Parts
Locations
&
parts
Lists.
For
Seneral
usage
and
maintenance
of
the
unit,
please
refer
to
the
operating
lnstructions
attached
with
the
unit.
TABLE
OF
CONTENTS
y
Y
Section
Title
1.
SPECIFICATIONS
2.
BLOCK
DIAGRAM
AND
VALU;
öF
EÀCH
LEVEL
.
:
3.
ADJUSTMENT
:
3-1.
Driver
Circu
it
Board
Ad
justment
4.
TROUBLESHOOTING
CHART
.
4-1.
Troubleshooting
on
power
supplys..t,or.
.
.
.
.
.
..
.
4-2-
Troubleshooting
on
Audio
section
5.
PARTS
LOGATIONS
AND
PARTS
LISTS
5-1-
F-2092
Eqralizer
&
power
supply
circuit
Board
5'2.
F'2095
Tone
Control
circuit
Board
5-3.
F-209G
Accessory
switch
Circuit
Board
5'4.
F-2097
Driver
&
power
supply
circuit
Board
5-5.
F-2093
Volume
Circuit
Board
5-6.
F-2094
Access
ory
switch
Circu
it
Board
5-7.
Other
parts
(Front
Side)
5-8.
Other
parrs
(Top
Side)
5-9.
Other
parrs
(Bortom
Side)
6.
REPLACEMENT
OF
POWER
TRANSISTORS
.
7.
PACKING
LIST
8.
ACCESSORY
PARTS
LIST
9.
SCHEMATIC
DIAGRAM
P
age
.2
.3
.4
.4
.5
.5
5,6
.7
7,8
.9
10
TL,
L2
13
13
L3,
L4
15
16
T7
l7
L7
18
V
Y
V