Sansui AU-7700 Service Manual page 2

GAU
-r7oo
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