TX-NR901
SERVICE PROCEDURES 1
1. Replacing the fuses
This symbol located near the fuses indicates
that the fuse used is fast operating type. For continued
protection against fire hazard, replace with same type fuse.
For fuse rating refer to the marking adjacent to the symbol.
Ce symbole indique que le fusible utlise est a
rapide. Pour une protection permanente, n'untiliser que
fusibles de meme type. Ce darnier est la qu le present
symbol est appse.
2. To initialize the unit
This device employs a microprocessor to perform various
functions and operations. If interference generated by an
external power supply, radio wave, or other electrical source
results in accident which causes the specified operations
and functions to operate abnormally.
To perform a result, please follow the procedure below.
1.Press the STANDBY ON button to turn on the unit.
2.Press and hold down the VIDEO 1 button, then press the
STANDBY/ON button.
3.After "CLEAR" is displayed, the preset memory and each
mode stored in the memory, such as surround, are
initialized and will return to the factory setting.
4.Unplug the power supply cord.
3. Safety-check out
(Only U.S.A. model)
After correcting the original service problem, perform the
following safety check before releasing the set to the
customer. Connect the insulating-resistance tester between
the plug of power supply cord and screw on the back panel.
Specifications: 3.3Mohm+/-10% at 500V.
4. Memory Preservation
This unit does not require memory preservation batteries. A
built-in memory power back-up system preserves the contents
of the memory during power failures and even when the unit is
unplugged.The unit must be plugged in order to charge the
back-up system.
The memory preserv ation period after the unit has been
unplugged varies depending on climate and placement of the
unit. On the average, memory contents are protected over a
period of a fe w weeks after the last time the unit has been
unplugged.This period is shorter when the unit is exposed to a
highly humid climate.
5.Setting the voltage selector
(Worldwide models only)
Worldwide models are equipped with a voltage selector so
that you
supplies. Be
can set your TX-NR901 to conform with local power
sure to set this switch to match the voltage of
your area before plugging in the unit.
Determine the proper voltage for your area: 220-230 V or
the preset voltage is not correct for your area,
into the groove in the switch and slide
(220-230 V), whichever is appropriate.
Note: <D>: 120V model only
<A>: Australian model only
<T>: Worldwide model only
<R>: Chinese model only
the power supply in
120 V. If
insert a screwdriver
the switch all the way to the top (120 V) or bottom
REF. NO.
PART NO.
DESCRIPTION
F901
252196
12A-UL/T-314,Fuse <D/T/R>
F902
252078
5A-SE-EAK,
252244 or
5A-SE-TL250V or
252278
5A-SE-TL250V, Fuse <T/A/R/K>
F903
252164 or
5A-UL/T-237 or
252258
5A-T/UL-ST2,Fuse <D>
252075,
2.5A-SE-EAK,
252241 or
2.5A-SE-TL250V or
252275
2.5A-SE-TL250V,Fuse <T/A/R/K>
F9501,F9502
252160 or
2.5A-UL/T-237 or
252254
2.5A-T/UL-ST2,Fuse <D>
252075,
2.5A-SE-EAK,
252241 or
2.5A-SE-TL250V or
252275
2.5A-SE-TL250V,Fuse <T/A/R/K>
F9503,F9504
252158 or
1.6A-UL/T-237 or
252252
1.6A-T/UL-ST2,Fuse <D>
252073,
1.6A-SE-EAK,
252239 or
1.6A-SE-TL250V or
252273
1.6A-SE-TL250V,Fuse <T/A/R/K>
<K>: Korean model only
FM
75
OUT
OUT
OUT
OUT
L
OUT
PHONO
DIGITAL
IN
PRE OUT
DIGITAL
OUT
OPT
OPT
2
1
2
3
4
1
2
FRONT
SUB
SURR
R
L
AUDIO
R
L
CD
TAPE
R
L
AUDIO
VIDEO
S VIDEO
MONITOR
OUT
R
L
IN
IN
IN
IN
IN
IN
IN
ZONE 2
DVD
VIDEO 1
VIDEO 2
VIDEO 3
VIDEO 4
AUDIO
AUDIO
VIDEO
S VIDEO
1
3
GND
SURR
BACK/
ZONE 2
R
L
IN
AC INLET
COAX
R
ZONE 2
REMOTE
CONTROL
RS232
I R
12V TRIGGER OUT
IN
CENTER
ETHERNET
(Net -Tune)
R
L
MULTI CH
INPUT
FRONT
SUB
SURR
SURR
BACK
CENTER
R
L
AM
ANTENNA
COMPONENT
VIDEO
Y
PB
PR
OUTPUT
INPUT 1
Y
PB
PR
INPUT 2
Y
PB
PR
VOLTAGE
SELECTOR
220-230V
120V
TX-NR
901
MODEL NO. /
SURR
BACK/
ZONE 2
SPEAKERS
FRONT SPEAKERS
L
RL
R
SURR SPEAKERS
CENTER
SPEAKER
R
L
VOLTAGE
SELECTOR
220-230V
120V
