TX-NR900/E
SERVICE PROCEDURES
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.
CIRCUIT NO.
PART NO.
DESCRIPTION
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 e xposed to a
highly humid climate.
Advanced Menu
0.Hardware Setup
0-4.AM Frequency Step
a.Frequency Step
:9 kHz
6. AM Frequency Step Sub-menu
(Worldwide model only)
This sub-menu only appears on the worldwide model. The
setting in this sub-menu determines the increment amount
or decrement amount when adjusting the AM tuner frequency.
The initial setting is 9 kHz, and this needs only to be changed
if you are using the TX-NR900 in a 10-kHz region.
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-NR900 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
<O>: Except 120V model
<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
7. To confirm the version of microprocessor
1.Press the STANDBY ON button to turn on the unit.
2.Press and hold down the DISPLAY button after more than
15 sec., then press the STANDBY/ON button.
3.After the versions of main,sub and net microprocessors are
displayed on FL tube, the unit returns to the original position.
F6901,F6902
252100
10A-EAK, Fuse <O>
252196
12A-UL/T-314, Fuse <D>
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 <O>
F903
252075,
2.5A-SE-EAK,
252241 or
2.5A-SE-TL250V or
252275
2.5A-SE-TL250V, Fuse <O>
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 <O>
VOLTAGE
SELECTOR
120V
220-230V
AUDIO
VIDEO
S VIDEO
MONITOR
OUT
IN
IN
IN
IN
IN
ZONE 2
DVD
VIDEO 1
VIDEO 2
VIDEO 3
VIDEO 4
AUDIO
VIDEO
S VIDEO
COMPONENT
VIDEO
Y
PB
PR
OUTPUT
INPUT 1
Y
PB
PR
INPUT 2
Y
PB
PR
FRONT SPEAKERS
L
RL
R
SURR SPEAKERS
R
L
R
L
OUT
OUT
OUT
PHONO
PRE OUT
FRONT
SUB
SURR
R
L
AUDIO
R
L
CD
TAPE
R
L
AUDIO
GND
SURR
BACK/
ZONE 2
IN
OUT
R
L
MULTI CH
INPUT
FRONT
SUB
SURR
SURR
BACK
CENTER
R
L
R
L
AM
FM
75
DIGITAL
INPUT
DIGITAL
OUTPUT
OPT
OPT
2
1
2
3
4
1
2
R
L
1
3
COAX
NETWORK
ZONE 2
REMOTE
CONTROL
RS232
I R
12V TRIGGER OUT
IN
OUT
AC INLET
SURR BACK/
ZONE 2 SPEAKERS
CENTER SPEAKER
TX-NR
900E
MODEL NO.
AC OUTLETS
AC 230-240V
50 Hz
SWITCHED
TOTAL 100W MAX.
CENTER
ANTENNA
4 OHMS MIN. OR
6 OHMS MIN.
/SPEAKER
CAUTION:
SPEAKER
IMPEDANCE
SEE
INSTRUCTION
MANUAL FOR
CORRECT
SETTINGS.
120V
VOLTAGE
SELECTOR
220-230V
