Sansui AU-6500 - QUICK TROUBLESHOOTING; Operational and Connection Checks; Fuse and Protection Circuitry

QUICK CHECK LIST OF SIMPLE MISTAKES
Some of the troubles which seem to result from
a malfunction of the amplifier are caused by wrong
operation and the negligence of simple maintenance,
and can be quickly corrected by making a simple
investigation and providing simple cures. To make
sure you haven’t made any of these mistakes, go
over the following check list once.
Connections
1. Have you connected the power cord to a wall
AC outlet ? O
2. Are the connecting cables for the turntable and
tape deck not loose ? |
3. Are the speaker cables not loose from amplifier’s
jacks or the speaker systems?
4. Do your speaker systems have impedance of 8
ohms more? (They must, if you wait to drive two
pairs at one time.)
5. Have the power fuse or quick-acting fuses not
blown?
Operating Procedure
1. Have you turned on the Power/Speakers Switch?
2. Is the Tape Monitor Switch not set to PLAY-
BACK position, though you don’t want to reproduce
a tape? |
3. Is the Selector Control set to the correct position?
4. Is the Power/Speakers Switch set to the correct
position ?
5. Is the 4-Channel Adaptor Switch not pushed
down, though you are not using a 4-channel rear
amplifier or adaptor ?
If, even after these examinations, the amplifier does
not return to normal, it may be faulty. Contact the
Sansui dealer from whom you purchased the am-
plifier or your nearest Sansui Authorized Service
Station. Do not attempt opening the bonnet for
yourself. Such repair must be left to a qualified
serviceman.
Should the Power Fuse Blow
If no Power Indicator should glow and the ampli-
fier simply remains dead even after you have turned
on its power fuse has blown. If this happens, dis-
connect the power cord from the wall AC outlet at
once and examine the power fuse on the rear panel.
If you find it blown, replace it with a new glass-
tubed fuse of the rated capacity (3-ampere for 100
‘to 117 volts, 2-ampere for 220 to 240 volts). Never
use a fuse of a different capacity or a piece of wire,
even as a stop-gap measure, or serious danger could
result.
Reploce with same type
3A-250V fuse ot 100/117¥
2A-250V fuse at 220/240V
Vane on
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Quick-Acting Fuses
The AU-6500 is doubly protected with a. relay-
equipped protection circuit and four quick-acting
fuses. If no sound or distorted sound is heard from
either or both speaker systems, switch off the ampli-
fier, disconnect the power cord from the wall AC
outlet, remove the cover on the rear panel conceal-
ing the quick-acting fuses and examine them. If
you find any of them blown, find and eliminate the
cause of the blowout, then replace it with a new
glass-tubed quick-acting fuse supplied.
If the relay-equipped protection circuit ever goes to
work, the sound may come out intermittently. If it
happens, check the connections of various equip-
ment and your operating procedure once.
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