Technics SH-AC300

| Troubleshooting guide |
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 problem and restore proper operation.
If you are in doubt about some of the check points, or if the remedies 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 center, or consult your dealer for instructions.
(In U.S.A. consult PASC Authorized Servicenters for detailed instructions or call 1-800-545-2672 for the address of an authorized factory
servicenter.}
Problem Probable cause(s) Suggested remedy
Power will not switch ON. The power cord plug is not completely
inserted.
When listening to stereo sound, The left and right stereo connection cables
the left and right sounds are are reversed.
reversed.
Poor sound localization The stereo connection cable for 6 channel
analog output is connected incorrectly.
There is no sound when a source The input selector setting is incorrect. eCheck to be sure that the selection of the
is being played. desired sound source is made correctly.
The muting function is set to ON. ePress the muting button on the remote
control.
Sound is not heard from one of The volume balance of front speaker is set è Adjust the volume balance between left 11
the front speakers too far to one side, either left or right. and right front speaker correctly.
Sound is not heard from the The receiver or amplifier is set to 2 channel eSet the receiver or amplifier to the Lis,
eConfirm that the power cord plug is
connected completely.
e Connect the stereo connection cable
correctly.
(Use the test signal to confirm that each
speaker is connected correctly.)
center, sorround or subwoofer (L, R) input. 6-channel discrete input mode.
speakers.
The presence setting of each speaker has eSet the type and presence setting of each
been incorrectly set to “NONE” or “NO”. speaker correctly.
The volume cannot be controlled. | The input selector is set to LINE. è Adjust the volume control on connected
external unit.
The SURROUND mode cannot be The presence setting of surround speaker
selected has been incorrectly set to “NONE”.
elf the surround speakers are connected,
set the type setting of surround speakers
to “LARGE” or “SMALL”.
eif the center speaker is connected, set the
type setting of center speaker to “LARGE”
or “SMALL”.
The AC-3 mode is not selected. ` eSelect the AC-3 mode.
eCheck if the AC-3 indicator is illuminated.
The 3 STEREO mode cannot be
selected.
The presence setting of center speaker has
been incorrectly set to “NONE”.
The midnight mode cannot be
functioned (When the dynamic
range compression button on the
remote control is pressed, the DR
COMP indicator does not light.)
The source being played has not been
recorded in the Dolby Digital (AC-3)
format.
eTurn off the power once and then turn it
on again, or disconnect the AC power
supply cord once and then connect it to
your household AC outlet again.
(If “F70” still remains on the display,
consult authorized service centers or your
dealer.)
The batteries have run out. € Replace batteries with new ones.
There is an obstruction between the remote @Remove the obstruction.
control and this unit.
The batteries are inserted incorrectly. eReinsert batteries so that polarities are
[The (+) and (—) polarities are reversed.] correct,
“F70” appears on the display.
Remote control does not operate
correctly.
General information EE