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Sansui AU-6500 - ALIGNMENT PROCEDURES; Power Amplifier Output Alignment; Power Amplifier Current Alignment

Sansui AU-6500
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ALIGNMENT
Output
of
Power
Amplifier
Current
Alignment
of
Power
Section
Amplifier
Section
STEP
CONNECT/ADJUST
REMARKS
step
|AMMETER|
CONNECT/ADJUST
[REMARKS
(TESTER)
1.
Remove
Foo.
and
Foo.
|
Use
1.
|
Connect
load
resistance
(8
ee
ene
ee
to
16
ohms)
to
left
(right)
2.
Turn
VRgo3
and
VRgox
|v.
channel
SYSTEM-A
fully
eaunterelociewise:
laa
speancraceminal:
3.
Turn
Power/Speakers
|
range.
Switch
to
SPKR
OFF.
Set
to
Connect
ammeter
100mA
where
Fo92
was.
(Con-
3.
|
Turn
Power/Speakers
?
range.
nect
(21)
on
schematic
|
Swith
to
SYSTEM-A.
,
2
to
minus
terminal
of
ammeter,
other
end
to
4.
Adjust
VRgo:
(VRgo2)
so
plus
terminal.)
that
voltmeter
indicates
5
Adjust
VRene
(left
chan-
0+50mA.
Repeat
above
eels
SO
that
Nee
procedure
for
right
chan-
‘nadicates
O08
to
Som
A
nel
(notations
in
parenthe-
ses
are
for
right
channel).
6.
Turn
off
Power/Speak-
|
ers
Switch
and
replace
Foo2
:
7.
|
Set
to
Turn
Power/Speakers
100mA
Switch
to
SPKR
OFF,
range.
then
connect
ammeter
where
Fo93
was.
(Con-
nect
(22)
on
circuit
schematic
to
minus
ter-
minal
of
ammeter,
other
end
to
plus
ter-
minal.)
8
.
Adjust
VReos
(right
channel)
so
that
am-
meter
indicates
28
to
32mA.
9.
Turn
off
Power/Speak-
ers
Switch
and
replace
Foos.
2.
|
Connect
voltmeter
in
par-
|
Set
voltmeter
to
allel
with
load
resistance.
|
0.5V~3V
range.
>
VR803
VR804
VR801-

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