Using the remote 
control 
transmitter
All 
the opeíations, êxcept for turning the 
unit ON/OFF and timeí 
play 
can be controlled írom remote locations. 
Sst the CD/TAPE 
Selector
switch ol thê íemote 
control transmitter to CD.
When 
a cass6tte deck bearing the 
Onkyo 
" 
Fll 
" 
mark 
is 
connoct6d to the remote 
control 
jacks 
oÍ th€ DX-3500 modêls, the deck 
can
bê controlled 
by this 
remot6 
control transmitteí. 
Set the 
CD/TAPE 
s€loctoí switch to TAPE. At 
this setting, ths 
Íorward 
play, 
rovorse
play, 
stop, rec/pause, têst ÍoÍward, íast 
rowind Íunctions can be opeíáted 
by remoto control.
i
I
ri
ll
tl
Batteries
o 
The 
remote 
control transmitter is 
powered 
by 
two  batteries.
Before 
using this unit 
for 
the 
first 
time, insert 
the two batteries
(included) 
as shown in 
the díagram.
a 
Average 
battery life is 
about one 
year. 
This 
period 
may 
be shorter
depending 
on the 
frequency 
of use and environment 
(temper-
ature and humidity) 
in which 
the 
remote 
control transmitter is
used.
a 
lf 
the remote 
control transmitter 
does 
not 
operate 
even though
front 
panel 
controls function normally, 
the batteries 
should 
be
replaced. 
Use only 
batteries 
listed 
in 
the 
following 
chart.
Type
Voltage
Size
Manga-
nese
1.5V
AA
R6
UM-3
Jransmitter 
Battery 
Replacement
@ 
eusn 
the 
battery cover 
on the 
rear 
of the transmitter in 
the di-
rection 
oí the 
arrow and lift 
it 
up.
Load 
the two 
batteries that 
came with 
the transmitter 
or two
batteries 
listed 
in 
the 
table. 
Load 
them with 
the 
+ 
and 
- 
ends
facing 
as shown in 
the diagram.
Functions 
for remote 
control
o 
CD/TAPE 
Selector 
Switch
This 
switch 
switches transmission 
of 
remote 
control functions
for 
the 
remote 
control transmitter 
between the CD 
and cassette
tape 
deck.
o 
Volume 
Control Buttons 
( 
v 
VOLUME 
r 
1
Press 
V  button to 
lower 
the volume level 
output 
from 
the
variable 
output 
jacks 
and 
headphone 
output 
jacks, 
and 
press
a 
button to increase.lt works 
as the 
same as the 
level 
control
knob 
of 
the 
DX-3500.
DX-3500
transmitter RC-121 
C
o 
Precautions
1 .  Remove 
the batteries if the remote 
control 
transmitter is not 
going
to be 
used 
for 
a long 
time.
2.  The 
batteries of 
the 
remote 
control transmitter 
must 
be 
replaced
periodically.
3.  This 
unit uses infrared 
rays. Therefore. 
commands may not 
be
received 
properly 
if 
the 
front 
panel 
of this unit is 
exposed 
to
bright 
light. 
To 
prevent 
this from 
occurring, 
place 
this 
unit so
that it is not 
directly exposed 
to bright light.
4. 
lf 
this 
unit 
is 
placed 
inside 
an 
audio 
rack 
behind a 
glass 
door,
the 
door should not 
have 
colored 
glass 
or 
have 
any 
decorations
on 
it, 
since this 
could shoÍten 
the range 
or 
prevent 
commands
from 
being received.
5. 
Use 
oÍ other infrared remote 
control 
devices in 
the same room
may 
cause interÍerence.
6. 
The 
transmitter 
operates 
up to a 
distance of about five 
meters
(16 
feet). 
The 
transmitting 
window  must 
always be 
pointed 
at
the 
reception 
window 
when 
a 
command 
is 
sent 
to the CD 
player.
7.  lf 
this 
remote 
control 
transmitter 
does 
not 
operate 
properly,
confirm 
that the 
batteries are not 
dead. lf 
the 
problem 
persists,
contact 
your 
Onkyo 
Service Center.
@
NOTES:
1.  Do 
not 
leave 
an expired 
battery 
in 
the case as 
it may leak
or damage 
the battery case.
2.  When 
inserting 
the 
batteries, be 
sure the 
(+; 
and 
(-) 
ends
are 
properly 
aligned.
3.  Do not 
use nickel-cadmium 
(rechargeable) 
batteries.
4.  Do not 
use 
one specified 
(manganese) 
battery and one 
al-
kaline 
battery at 
the same time.
5.  Replace 
both 
batteries at 
once; do 
not 
use 
one old and 
one
new 
battery 
together.
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