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AV Receiver
TX-L55
Instruction Manual
Thank you for purchasing an Onkyo AV Receiver.
Please read this manual thoroughly before making
connections and plugging in the unit.
Following the instructions in this manual will enable
you to obtain optimum performance and listening
enjoyment from your new AV Receiver.
Please retain this manual for future reference.
Contents
Introduction ............................... 2
Connections ............................ 16
Basic Setup ............................. 30
Basic Operation ...................... 33
Advanced Operation ............... 44
Advanced Setup ...................... 48
Controlling Other
Components ......................... 55
Troubleshooting ...................... 59
Specifications.......................... 62


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2
Important Safety Instructions
1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this apparatus near water.
6. Clean only with dry cloth.
7. Do not block any ventilation openings. Install in
accordance with the manufacturer's instructions.
8. Do not install near any heat sources such as radia-
tors, heat registers, stoves, or other apparatus
(including amplifiers) that produce heat.
9. Do not defeat the safety purpose of the polarized or
grounding-type plug. A polarized plug has two
blades with one wider than the other. A grounding
type plug has two blades and a third grounding
prong. The wide blade or the third prong are pro-
vided for your safety. If the provided plug does not
fit into your outlet, consult an electrician for
replacement of the obsolete outlet.
10. Protect the power cord from being walked on or
pinched particularly at plugs, convenience recepta-
cles, and the point where they exit from the appara-
tus.
11. Only use attachments/accessories specified by the
manufacturer.
12. Use only with the cart, stand,
tripod, bracket, or table spec-
ified by the manufacturer, or
sold
with
the
apparatus.
When a cart is used, use cau-
tion when moving the cart/
apparatus
combination
to
avoid injury from tip-over.
13. Unplug this apparatus during lightning storms or
when unused for long periods of time.
14. Refer all servicing to qualified service personnel.
Servicing is required when the apparatus has been
damaged in any way, such as power-supply cord or
plug is damaged, liquid has been spilled or objects
have fallen into the apparatus, the apparatus has
been exposed to rain or moisture, does not operate
normally, or has been dropped.
15. Damage Requiring Service
Unplug the apparatus from the wall outlet and refer
servicing to qualified service personnel under the
following conditions:
A. When the power-supply cord or plug is damaged,
B. If liquid has been spilled, or objects have fallen
into the apparatus,
C. If the apparatus has been exposed to rain or
water,
D. If the apparatus does not operate normally by
following the operating instructions. Adjust only
those controls that are covered by the operating
instructions as an improper adjustment of other
controls may result in damage and will often
require extensive work by a qualified technician
to restore the apparatus to its normal operation,
E. If the apparatus has been dropped or damaged in
any way, and
F. When the apparatus exhibits a distinct change in
performance this indicates a need for service.
16. Object and Liquid Entry
Never push objects of any kind into the apparatus
through openings as they may touch dangerous volt-
age points or short-out parts that could result in a
fire or electric shock.
The apparatus shall not be exposed to dripping or
splashing and no objects filled with liquids, such as
vases shall be placed on the apparatus.
Don't put candles or other burning objects on top of
this unit.
17. Batteries
Always consider the environmental issues and fol-
low local regulations when disposing of batteries.
18. If you install the apparatus in a built-in installation,
such as a bookcase or rack, ensure that there is ade-
quate ventilation.
Leave 20 cm (8") of free space at the top and sides
and 10 cm (4") at the rear. The rear edge of the shelf
or board above the apparatus shall be set 10 cm (4")
away from the rear panel or wall, creating a flue-like
gap for warm air to escape.
WARNING:
TO REDUCE THE RISK OF FIRE OR ELECTRIC
SHOCK, DO NOT EXPOSE THIS APPARATUS
TO RAIN OR MOISTURE.
CAUTION:
TO REDUCE THE RISK OF ELECTRIC SHOCK,
DO NOT REMOVE COVER (OR BACK). NO
USER-SERVICEABLE PARTS INSIDE. REFER
SERVICING
TO
QUALIFIED
SERVICE
PERSONNEL.
The lightning flash with arrowhead symbol, within an
equilateral triangle, is intended to alert the user to the
presence of uninsulated "dangerous voltage" within
the product's enclosure that may be of sufficient
magnitude to constitute a risk of electric shock to
persons.
The exclamation point within an equilateral triangle is
intended to alert the user to the presence of important
operating and maintenance (servicing) instructions in
the literature accompanying the appliance.
WARNING
RISK OF ELECTRIC SHOCK
DO NOT OPEN
RISQUE DE CHOC ELECTRIQUE
NE PAS
OUVRIR
AVIS
PORTABLE CART WARNING
S3125A


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3
Precautions
1. Recording Copyright--Unless it's for personal use
only, recording copyrighted material is illegal with-
out the permission of the copyright holder.
2. AC Fuse--The AC fuse inside the TX-L55 is not
user-serviceable. If you cannot turn on the TX-L55,
contact your Onkyo dealer.
3. Care--Occasionally you should dust the TX-L55
all over with a soft cloth. For stubborn stains, use a
soft cloth dampened with a weak solution of mild
detergent and water. Dry the TX-L55 immediately
afterwards with a clean cloth. Don't use abrasive
cloths, thinners, alcohol, or other chemical solvents,
because they may damage the finish or remove the
panel lettering.
4. Power
WARNING
BEFORE PLUGGING IN THE UNIT FOR THE
FIRST TIME, READ THE FOLLOWING SEC-
TION CAREFULLY.
AC outlet voltages vary from country to country.
Make sure that the voltage in your area meets the
voltage requirements printed on the TX-L55's rear
panel (e.g., AC 230 V, 50 Hz or AC 120 V, 60 Hz).
Setting the [STANDBY/ON] button to STANDBY
does not fully shutdown the TX-L55. If you do not
intend to use the TX-L55 for an extended period,
remove the power cord from the AC outlet.
Memory backup
The TX-L55 uses a battery-less memory backup system
in order to retain radio presets and other settings when
it's unplugged or in the case of a power failure.
Although no batteries are required, the TX-L55 must be
plugged into an AC outlet in order to charge the backup
system.
Once it has been charged, the TX-L55 will retain the
settings for several weeks, although this depends on the
environment and will be shorter in humid climates.
For British models
Replacement and mounting of an AC plug on the power
supply cord of this unit should be performed only by
qualified service personnel.
IMPORTANT
The wires in the mains lead are coloured in accordance
with the following code:
Blue:
Neutral
Brown:
Live
As the colours of the wires in the mains lead of this
apparatus may not correspond with the coloured mark-
ings identifying the terminals in your plug, proceed as
follows:
The wire which is coloured blue must be connected to
the terminal which is marked with the letter N or
coloured black.
The wire which is coloured brown must be connected to
the terminal which is marked with the letter L or
coloured red.
IMPORTANT
A 5 or 13 ampere fuse is fitted in this plug. Should the
fuse need to be replaced, please ensure that the replace-
ment fuse has a rating of 5 or 13 amperes and that it is
approved by ASTA or BSI to BS1362. Check for the
ASTA mark or the BSI mark on the body of the fuse.
IF THE FITTED MOULDED PLUG IS UNSUITABLE
FOR THE SOCKET OUTLET IN YOUR HOME
THEN THE FUSE SHOULD BE REMOVED AND
THE PLUG CUT OFF AND DISPOSED OF SAFELY.
THERE IS A DANGER OF SEVERE ELECTRICAL
SHOCK IF THE CUT OFF PLUG IS INSERTED
INTO ANY 13 AMPERE SOCKET.
If in any doubt, consult a qualified electrician.
For European Models
Declaration of Conformity
We, ONKYO EUROPE
ELECTRONICS GmbH
LIEGNITZERSTRASSE 6,
82194 GROEBENZELL,
GERMANY
GROEBENZELL, GERMANY
ONKYO EUROPE ELECTRONICS GmbH
I. MORI
declare in own responsibility, that the ONKYO product
described in this instruction manual is in compliance with the
corresponding
technical standards such as EN60065,
EN55013, EN55020 and EN61000-3-2, -3-3.


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4
Precautions--Continued
For U.S. models
Note to CATV system installer:
This reminder is provided to call the CATV system
installer's attention to Section 820-40 of the NEC which
provides guidelines for proper grounding and, in partic-
ular, specifies that the cable ground shall be connected
to the grounding system of the building, as close to the
point of cable entry as practical.
FCC Information for User
CAUTION:
The user changes or modifications not expressly
approved by the party responsible for compliance could
void the user's authority to operate the equipment.
NOTE:
This equipment has been tested and found to comply
with the limits for a Class B digital device, pursuant to
Part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against harmful interfer-
ence in a residential installation.
This equipment generates, uses and can radiate radio
frequency energy and, if not installed and used in accor-
dance with the instructions, may cause harmful interfer-
ence to radio communications. However, there is no
guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful inter-
ference to radio or television reception, which can be
determined by turning the equipment off and on, the
user is encouraged to try to correct the interference by
one or more of the following measures:
· Reorient or relocate the receiving antenna.
· Increase the separation between the equipment and
receiver.
· Connect the equipment into an outlet on a circuit dif-
ferent from that to which the receiver is connected.
· Consult the dealer or an experienced radio/TV tech-
nician for help.
Supplied Accessories
Make sure you have the following accessories:
* In catalogs and on packaging, the letter added to the end of
the product name indicates the color of the TX-L55. Spec-
ifications and operation are the same regardless of color.
Remote controller & two batteries (AA/R6)
Indoor FM antenna
Power-plug adapter
Only supplied in certain countries. Use this adapter if
your AC outlet does not match with the plug on the
TX-L55's power cord. (Adapter varies from country to
country.)
75/300-ohm antenna adapter
(Not supplied with American and European models.)
Speaker cable labels
Fr
ont
Left
Fr
ont
Left
SP-B
/Zone
2
Left
SP-B
/Zone
2
Left
Surr
ound
Right
Surr
ound
Right
Surr
ound
Bac
k
Right
Surr
ound
Bac
k
Right
Zone
2
Right
Zone
2
Right
Fr
ont
Left
Fr
ont
Left
SP-B
/Zone
2
Left
SP-B
/Zone
2
Left
Fr
ont
Right
Fr
ont
Right
SP-B
/Zone
2
Right
SP-B
/Zone
2
Right
Fr
ont
Right
Fr
ont
Right
SP-B
/Zone
2
Right
SP-B
/Zone
2
Right
Surr
o
und
Right
Surr
ound
Right
Center
Center
Center
Center
Surr
ound
Left
Surr
ound
Left
Surr
o
und
Left
Surr
ound
Left
Surr
ound
Bac
k
Right
Surr
o
und
Bac
k
Right
Zone
2
Right
Zone
2
Right
Surr
ound
Bac
k
Left
Surr
ound
Bac
k
Left
Zone
2
Left
Zone
2
Left
Surr
ound
Bac
k
Left
Surr
o
und
Bac
k
Left
Zone
2
Left
Zone
2
Left
1
2
3
Speaker Cable


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5
Features
· 60 W/Ch, Continuous 6 ohms, 1 kHz (FTC)
· Exclusive Onkyo Digital Amplifier Technology
· DTS-ES Discrete/Matrix 6.1, DTS NEO:6,DTS 96/
241, Dolby Digital EX, Dolby Pro Logic IIx2
· Discrete Output Stage Circuitry
· Non-Scaling Configuration
· Optimum Gain Volume Control
·5 DSP Modes
·2 Component Inputs / 1 Output
·3 Digital Inputs / Subwoofer Pre Out
· Color-Coded Multichannel Inputs for DVD-Audio
and Super Audio CD
· CinemaFILTER3
· Double Bass
· Crossover Adjustment (60/80/100/120/150 Hz)
· Source Direct Mode
· Preprogrammed (for TV and DVD Players)
1.
"DTS," "DTS 96/24," "DTS-ES," and "Neo:6" are trade-
marks of Digital Theater Systems, Inc.
2.
Manufactured under license from Dolby Laboratories.
"Dolby", "Pro Logic" and the double-D symbol are trade-
marks of Dolby Laboratories.
3.
CinemaFILTER is a trademark of Onkyo Corporation.