Before requesting service for this unit, check the chart below for a
possible cause of the problem you are experiencing. Some simple
checks or a minor adjustment on your part may eliminate the prob-
lem and restore proper operation.
If you are in doubt about some of the check points, or if the reme-
dies indicated in the chart do not solve the problem,
refer to the directory of authorized service centers (enclosed with
this unit) to locate a convenient service canter, or consult your
Technics dealer for instructions,
(In U.S.A. consult MSC Authorized Servicenters for detailed instruc-
tions or call 1-800-545-2672 for the address of an authorized factory
servicenter.)
i Problem I Probable cause(s) i Suggested remedy I
Problems noted at all times
No sound is heard when the The power cord plug is not completely inserted. • Confirm that the power cord plug isconnected corn-
power Is switched ON. pletely.
Connections are incomplete or incorrect to the • Check to be sure that arl connection wires are cor-
speaker systems, etc. rectly connected.
The incorrect input selector of the amplifier has • Check to be sure that the correct selector is pressed.
been pressed.
The speaker selector isset incorrectly. • Set itto the correct position.
When listening to stereo One of the speakers is connected out of phase [(+) • Reconnect the speakers maintaining proper polarity
sound, the sound lacks _.(-), (-)-,.(+)]. [i.e., (+)-.(+), (-)-.(-)].
depth (i.e. thin bass, tinny
sound).
When listening to stereo The left and right speaker connections, source • Check all connections and correct them if necessary.
sound, the left and right connections, or graphic equalizer connections are
sounds are reversed, reversed.
A low-pitched noise ("hum" The power cord or a fluorescent light, etc., is near • Try separating this unit as far as possible from the
or "buzz") is heard, the connection wires, electric appliance.
Sound Is not heard from The speaker wires are disconnected. • Cheek and correct the connections of the speaker
one of the speaker systems, wires.
The balance control is set too far to one side. • Set so that sounds are heard at the center, between
the speaker systems.
Sound stops during a per- The volume level is excessively increased. • Decrease the volume level,
formance, or no sound is The protection circuitry has functioned because the • Switch OFF the power, and, after determining and
heard when the power is positive and negative speaker connection wires are correcting the cause, switch ON the power once
switched ON. "shorted" or speaker systems with an impedance again.
less than the indicated rated impedance of the • Use a speaker system of the proper impedance
amplifier are used. rating.
While listening to radio broadcasts
A strange hissing noise is Caused by the "discharge phenomenon" and the • Try placing this unit farther away from such equip-
produced continuously or =oscillation phenomenon" of electdc appliances ment.
Intermthently. (such as fluorescent lights, TV. small series-type • Install noise-prevention equipment on this unit or on
motors, rectification equipment, etc.), the electric appliance.
While listening to AM broadcasts
An unusual "Beat" sound is Unit is being used at the same time as the televi- • Switch OFF the television set, or use this unit farther
heard, sion set. away from it.
A low-pitched "hum" sound The AM loop antenna connection wires are too • Place the antenna connection wires and the power
is heard when the broad- close to the power cord. cord farther apart.
cast is tuned. The power supply frequency from the power cord • Install a special outdoor antenna.
ismodulated and heard from the speakers.
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