ENGLISH
16
TROUBLESHOOTING
Should faults occur, it is, in many cases, not necessary to consult your
dealer or technical service department. On the basis of the following
checks you will be able to rectify a number of conditions yourself without
difficulty.
If the condition cannot be remedied after the following checks, please
consult your dealer or the Superscope technical service department at
(630) 820-4800.
POWER AMP (PAC770)
Both speakers output monaural sound.
1. Check that the
MONO BRIDGE
switch is set to OFF.
Sound is output only from one of the speakers.
1. Check the setting of the
BALANCE
control.
2. Turn the power off and change the connections of the left and right
speakers. If sound is still not output from the same speaker, check its
connection cord or the speaker itself.
Sound is not produced at all.
1. Check that the speaker cords are connected properly.
2. Check that the
VOLUME
control is not set at the minimum level.
3. Check that the
EFFECT ON/OFF
switch is OFF, if nothing is con-
nected with the EFFECT jacks.
Sound consistently cuts off.
1. Check the temperature of the unit by placing your hand on the top or
bottom. If the temperature is extremely hot, the amplifier is cutting off
to portect itself. The output level must be decressed in order to
maintain a consistent output.
MIXER
MIC/LINE sound is not produced at all
1. Check that the MIC/LINE gain is not too low.
2. Check that the
SENSITIVITY
switch is set correctly based on the type
of input.
MIC/LINE sound is distorted
1. Check that the MIC/LINE sensitivity is set correctly.
2. Check that the MIC phantom power is turned on or off.
Hum interferes with the sound.
1. Check that cords are connected properly.
2. Check that there is not any source of magnetism (TV, motor, trans-
former, etc.) placed near the unit.
TAPE DECK
The tape does not travel.
1. Check that the power cord is plugged in properly.
2. Check that the
POWER
switch is set to ON.
3. Check that the tape is rewound.
The tape travels, but no sound is output.
1. Check that the cassette tape is recorded.
2. Check that the speakers are connected and functioning properly.
3. Check that the TAPE gain and volume control is not set at the minimum
level.
Tape will not record.
1. Check that the protection tabs of cassette tape are not broken.
Sound is distorted.
1. Check that the recording level is not too high.
2. Check that the head is not dirty.
Sound is unstable.
1. Check that the head is not dirty.
2. Check that the pinch wheels and capstans are not dirty.
3. Check that the tape is wound tightly.
Noise is noticeable.
1. Check that the head is not dirty.
2. Check that the head is not magnetized.
3. Check that the
DOLBY NR
switch is set properly according to the
tape.
CD PLAYER
The disc fails to play.
1. Check that the power cord is plugged in properly.
2. Check that the
POWER
switch is set to ON.
3. Check that the disc is placed in the correct position on disc tray.
4. Check that the disc is placed properly with the label side facing up.
5. Check that the disc is not dirty, scratched, or warped.
The disc is playing but no sound is heard.
1. Check that the speakers are connected and functioning properly.
2. Check that the CD gain and volume control is not set at the minimum
level.
The disc stops in mid-operation.
1. Check that the disc is not dirty, scratched, or warped.
The sound drops out or noise is heard.
1. Check that the disc is not dirty, scratched, or warped.
REPAIRS
Only the most competent and qualified technicians should be allowed
to service your unit. Superscope and its factory trained warranty station
personnel have the knowledge and special equipment needed for repair
and calibration of this precision instrument.
In the event of difficulty, call the telephone number listed in this owners
manual to obtain service. Please include the model and serial number
of your unit together with a copy of your purchase receipt and a full
description of what you feel is abnormal in its behavior.
CLEANING OF EXTERIOR SURFACES
With proper care and cleaning, the exterior finish of your equipment will
last indefinitely. Never use scouring pads, steel wool, scouring powders
or harsh chemical agents (e.g. lye solution), alcohol, thinners, benzine,
insecticide or other volatile substances, as these will mar the finish of the
cabinet. Likewise, never use cloths containing chemical substances. If
the equipment becomes dirty, wipe the external surfaces with a soft, lint-
free cloth.
If the cabinet becomes heavily soiled:
– dilute some liquid soap in water
– dip a soft, lint-free cloth in the solution and wring the cloth out until it
is damp
– wipe the equipment with the damp cloth
– dry the equipment by wiping it with a dry cloth
