Denon DRA-275RD - Semiconductor Details; Microcomputer (IC701) Pin Allocation

ENGLISH
TROUBLESHOOTING
1. Have all connections been made PROPERLY?
2. Have you followed all operational instructions correctly?
3. Are the speakers, turntable, and other components operating properly?
When
your
unit
does
not
seem
to
be
operating
correctly,
first
check
the
items
in
the
following
table.
if
the
symptom
does
not
correspond
to
any
of
the
problems
as
shown
below, turn off the power sources immediately and contact your DENON dealer.
|
FM AND AM RECEPTION
Radio
program
can
not
be
received.
Antenna
connection
is
wrong.
@
Check
the
connection.
@ Check the antenna installation.
e Asignal strength is weak.
@ install an outdoor antenna.
@ Keep the antenna away from the street.
@ Assignal strength is weak.
e@ Automobile ignition noise interferes with recep-
Noise is reproduced.
tion.
@ Other electrical equipment interferes withrecep- | @ Keep the equipment away from this set, or
tion. turn off the power of the other equipment.
The preset frequencies are erased. @ The memory back-up term (about 1 month)
passed.
e@ Preset again.
e Use manual tuning.
@ Use manual tuning for optimum reception.
In automatic tuning, the frequency doesn't stop
at the radio station.
e Asignal strength is weak.
Inautomatic tuning, it stops at the one step lower @ Noise or strong signal strength is received.
or higher frequency than the radio station.
Check the connection.
Turn on speaker switch.
Check these position.
Turn the power off once, check the connections to
the speakers, then turn the power on again.
@ Askyour dealer, or the nearest DENON representa-
tive.
e Set the power switch to ON, then turn the power
on from the remote control unit.
Or, push the power switch on the front panel,
twice.
No sound is produced with power on. Input and speaker cords connection are wrong.
Speaker switch is off.
The FUNCTION buttons are in wrong position.
The protective circuit is operating.
The fuse has blown out.
@ The power switch was set to OFF the last time
the power was turned off from the remote con-
trol unit.
Check the connection.
The input and grounding cords connection of the
turntable are wrong.
@ The cords connection of the cartridge are wrong.
@ The interference from the nearby TV or radio
transmission antenna.
Audible hum when playing records.
@ Check the connection.
@ Ask your dealer, or the nearest DENON representa-
tive.
The vibrations and sounds transmit from the
speakers to the turntable.
Howling is produced when the volume control is
turned up too high while playing records.
Insulate the vibrations, or keep the speakers away
from the turntable.
Clean the record.
@ Clean the stylus tip.
The record is stained with the dust.
© The stylus tip of the cartridge is stained with the
dust.
The cartridge is defective.
Cracking noise is produced when piaying re-
cords.
Try the other cartridge.