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Section
Before you start
01
02
Thank you for purchasing this PIONEER
product
To ensure proper use, please read through this
manual before using this product. It is especially
important that you read and observe WARN-
INGs and CAUTIONs in this manual. Please
keep the manual in a safe and accessible place for
future reference.
About this unit
CAUTION:
USE OF CONTROL OR ADJUSTMENT OR
PERFORMANCE OF PROCEDURES
OTHER THAN THOSE SPECIFIED HEREIN
MAY RESULT IN HAZARDOUS RADIATION
EXPOSURE.
CAUTION:
THE USE OF OPTICAL INSTRUMENTS
WITH THIS PRODUCT WILL INCREASE
EYE HAZARD.
CAUTION
! Do not allow this unit to come into contact
with liquids. Electrical shock could result.
Also, damage to this unit, smoke, and over-
heating could result from contact with
liquids.
! Always keep the volume low enough to hear
outside sounds.
! Avoid exposure to moisture.
! If the battery is disconnected or discharged,
any preset memory will be erased.
2
En
CAUTION
This product is a class 1 laser product classi-
fied under the Safety of laser products, IEC
60825-1:2007.
Note
Function setting operations are completed even
if the menu is canceled before the operations
are confirmed.
About this manual
! In the following instructions, USB memories
and USB audio players are collectively re-
ferred to as "USB storage device".
! In this manual, iPod and iPhone will be re-
ferred to as "iPod".
In case of trouble
Should this unit fail to operate properly, please
contact your dealer or nearest authorized
PIONEER Service Station.
Operating this unit
Head unit
DEH-X3550UI
1 2 3 4
5
6
7
8
9
a
b
c d
e
DEH-2550UI
2 1 3 4
c
5
6
7
8
9
a
b
d
e
Part
Part
BAND/
(iPod
1
8
SRC/OFF
control)
(back)/
2
9
h (eject)
DIMMER
(dimmer)
MULTI-CONTROL
3
a
c/d
(M.C.)
4
(list)
b
1/
to 6/
5
Disc loading slot
c
DISP/DISP OFF
AUX input jack
6
d
USB port
(3.5 mm stereo
jack)
Part
Part
DEH-X3550UI
MIX (MIXTRAX)
7
e
Detach button
DEH-2550UI
iPod
CAUTION
! Use an optional Pioneer USB cable (CD-
U50E) to connect the USB storage device as
any device connected directly to the unit will
protrude out from the unit, which could be
dangerous.
! Do not use unauthorized products.
Remote control
Remote controller buttons marked with the
same numbers as on the unit operate in the
same way as the corresponding unit button re-
gardless of button name.
f
a
g
8
h
m
i
l
1
j
k
Part
Operation
Press to increase or decrease
f
VOLUME
volume.
Press to mute. Press again to
g
MUTE
unmute.
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