TX-NR900/E
SERVICE MANUAL
SERVICE MANUAL
Black, Silver and Golden models
Ref. No. 3755
112002
AV RECEIVER
MODEL
TX-NR900/E
BUDD,BUDC
120V AC, 60Hz
BUPP,BUPA,SUPP,GUPA
230~240V AC, 50Hz
BUWT,GUWT,GUWR
120/220~230V AC, 50/60Hz
GUGT
220V AC, 50Hz
PUSH TO OPEN
TX-NR900E
STANDBY/ON
STANDBY
DVD
ZONE
2 ()
GRN
REC ()
RED
AUDIO
SELECTOR
PURE AUDIO
UPSAMPLING
OFF
ON
POWER
MASTER VOLUME
TUNER
PHONO
NET AUDIO
C D
TAPE
VIDEO
3
VIDEO
5
VIDEO
4
VIDEO
2
VIDEO
1
VCR
2
VCR
1
DISPLAY
SAFETY-RELATED COMPONENT
WARNING!!
COMPONENTS IDENTIFIED BY MARK
ON THE
SCHEMATIC DIAGRAM AND IN THE PARTS LIST ARE
CRITICAL FOR RISK OF FIRE AND ELECTRIC SHOCK.
REPLACE THESE COMPONENTS WITH ONKYO
PARTS WHOSE PART NUMBERS APPEAR AS SHOWN
IN THIS MANUAL.
MAKE LEAKAGE-CURRENT OR RESISTANCE
MEASUREMENTS TO DETERMINE THAT EXPOSED
PARTS ARE ACCEPTABLY INSULATED FROM THE
SUPPLY CIRCUIT BEFORE RETURNING THE
APPLIANCE TO THE CUSTOMER.
TX-NR900/E
SPECIFICATIONS
AMPLIFIER SECTION
Continuous average power output (FTC)
All channels:
110 W per channel min. RMS at 8
, 2 channels driven from 20 Hz to
20 kHz with no more than 0.08%
total harmonic distortion.
145 W min. RMS at 6
, 2 channels
driven from 1 kHz with no more
than
0.1%
total
harmonic
distortion.
Continuous power output (DIN) 150 W at 6
Maximum power output (EIAJ)
180 W at 6
Dynamic power output (stereo)
2
280 W at 3
2
220 W at 4
2
140 W at 8
Total Harmonic Distortion:
0.08% at rated power
0.08% at 1 W output
IM Distortion:
0.08% at rated power
0.08% at 1 W output
Damping factor:
60 at 8
Input sensitivity and impedance
PHONO:
2.5 mV, 50 k
LINE (CD, TAPE, DVD,
VIDEO 1-5):
200 mV, 50 k
MULTICHANNEL INPUT
(FRONT L/C/R, SURROUND
L/R, SURROUND BACK L/R): 200 mV, 50 k
(SUBWOOFER):
36 mV, 50 k
COAXIAL 1, 2, 3 (DIGITAL):
0.5 Vp-p, 75
DVD, VIDEO 1, 2, 3, 4, 5:
1 Vp-p, 75
1 Vp-p, 75
(Y)
0.28 Vp-p, 75 (C)
COMPONENT VIDEO 1, 2:
1 Vp-p, 75
(Y)
0.7 Vp-p, 75
(PB, PR)
Output level and impedance
Rec out (TAPE, VIDEO 1, 2):
200 mV, 470
Pre out:
1 V, 470
ZONE 2 OUT:
100 mV, 470
VIDEO (VIDEO 1, 2, MONITOR
OUT, ZONE 2 OUT):
1 Vp-p, 75
S-VIDEO (VIDEO 1, 2,
MONITOR OUT):
1 Vp-p, 75
(Y)
0.28 p-p, 75 (C)
COMPONENT VIDEO OUT:
1 Vp-p, 75
(Y)
0.7 Vp-p, 75
(PB, PR)
Phono overload:
120 mV RMS at 1 kHz, 0.5% T.H.D.
Frequency response:
10 Hz to 100 kHz : +1/ 3 dB
(CD in Direct mode)
RIAA deviation:
20 Hz to 20 kHz : ±0.8 dB
Tone Control
Bass:
±10 dB at 50 Hz
Treble:
±10 dB at 20,000 Hz
Signal-to-noise ratio (direct)
Phono:
80 dB (IHF A, 5 mV input)
CD/Tape:
110 dB (IHF A, 0.5 V input)
TUNER SECTION
FM
Tuning range
USA & Canadian models:
87.50 108.00 MHz (100-kHz steps)
Other models:
87.50 108.00 MHz (50-kHz steps)
Usable sensitivity
Mono:
11.2 dBf, 1.0 µV (75 IHF)
0.9 µV (75
DIN)
Stereo:
17.2 dBf, 2.0 µV (75 IHF)
23 µV (75
DIN)
50 dB quieting sensitivity
Mono:
17.2 dBf, 2.0 µV (75 )
Stereo:
37.2 dBf, 20 µV (75 )
Capture ratio:
2.0 dB
Image rejection ratio:
85 dB
IF rejection ratio:
90 dB
Signal-to-noise ratio
Mono:
76 dB
Stereo:
70 dB
Alternate channel attenuation:
55 dB
Selectivity:
50 dB (DIN)
AM suppression ratio:
50 dB
Total harmonic distortion
Mono:
0.2%
Stereo:
0.3%
Frequency response:
30 Hz15 kHz, ±1.0 dB
Stereo separation:
45 dB at 1 kHz
30 dB at 100 Hz 10 kHz
AM
Tuning range
USA & Canadian models:
530 to 1,710kHz (10kHz steps)
Other than world wide models:522 to 1,611 kHz (9-kHz steps)
Worldwide models:
522 to 1,611 kHz (9-kHz steps) or
530 to 1,710 kHz (10-kHz steps)
Usable sensitivity:
30 µV
Image rejection ratio:
40 dB
IF rejection ratio:
40 dB
Signal-to-noise ratio:
40 dB
Total harmonic distortion:
0.7%
GENERAL
Power supply
USA & Canadian models:
AC 120 V, 60 Hz
European & Australian models:AC 230 240 V, 50 Hz
Some Asian models:
AC 220230 V, 50/60 Hz
Worldwide models:
AC 220 230 and 120 V switchable,
50/60 Hz
Power consumption
USA & Canadian models:
8.4 A
Other models:
670 W
Dimensions (W H
D):
435
175 459 mm
17-1/8"
6-7/8"
18-1/16"
Weight
USA & Canadian models:
17.5 kg (38.6 lbs)
Other models:
18.2 kg (40.1 lbs)
Specifications and features are subject to change without notice.
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
F9501A
U17
97
4
4
U13
4
U21
Q6056
U12
57
4
4
49
4
46
4
55
53
U18
U6
4
56
52
54
Q6062
Q6052
97
Q6066
61
61
57
38
Q9422B
U23
56
4
52
U17
55
F9501
F9502
F9504
F9503
4
58
U29
4
Q9422A
4
34
46
47
4
F6901
F6902
39
T901
4
E821
43
46
44
37
86
37
36
35
36
69
68
67
33
41
65
66
62
64
75
U16
76
71
76
U16
71
P/T/GT
models
U22
42
45
63
P/T/R/GT
models
TX-NR900/E
EXPLODED VIEW
TX-NR900/E
U9
U15
P7701
10 31 U46
U44
5
4
45
2
U47
U48
1
81
4
8
82
7
14
9
16
3
3
22
21
18
3
3
3
23
2019
28
30
13
12
25
24
27
29
26
P7201
U31
U1
38
U7
F903
U39
F901
F902
P901
70
74
72
73
77
71
P1010
U51
U32
U33
U40
U37
U38
U11
U36
U35
6
6
U10
59
P602
P603
P603C
P7701
U2
U8
92
91
87
40
Chinese model only
A
1
2
3
4
BCD
E
TX-NR900/E
BLOCK DIAGRAM
SBR
COMP
REC/ Z2
COMP
INP
C
REC/Z2
C
INP
Y
REC/Z2
RIGHT
REC/Z2
Y
C
VIDE O 1
Y
C
S-VIDEO OUTPUT
MONITOR
Y
C
VIDE O 2
Y
C
VIDEO5
(FRONT)
Y
C
S-VIDEO INPUT
DVD
Y
C
VIDEO1
Y
C
VIDEO2
Y
C
VIDEO3
Y
C
VIDEO4
MUTE
MUTE
I SDET
VIDEO 5 L
R
( FRON T)
ZONE2
LINEOUT
L
R
L VIDEO 2
R
24.576MHZ
24.576MHZ
TAPE L
R
DVD L
R
R
CD L
R
VIDEO 3 L
R
VIDEO 4 L
R
VIDEO 1 L
R
VIDEO 2 L
R
REC OUT
L TAPE
R
L VIDEO 1
R
1
Y
CB
CR
INPUT
2
Y
CB
CR
VIDEO 3
VIDEO 4
VIDEO 5
(FRONT)
COMPOSITE VIDEO INPUT
DVD
VIDEO 1
VIDEO 2
OPTICAL1
DIGITAL AUDIO OUTPUT
OPTICAL 2
EP 7312 -CV
ARM7
M AVERICK
MB86D41P FV
DECO DING
(AC-3,DTS)
(DTS -ES)
(PLI I,NEO:6)
SUBMICRO-
PROCESSOR
M3062FGAFP
M B863 44BPFV
POST
PROCE SSING
( THXCINEMA)
(SURR EX)
AK45
28VF
96/24
2CHD/A
( 2/2)
AK43
56VQ
192/24
6CHD/A
CY7C 1019
BV33
SRAM1M
CY7C1019
BV33
SRAM1M
OSD
LC74
761
-9189
WM8716
96/24
D/A
MX29
LV320BTC
FLASH ROM
4M
NM52
64165FTT
SDRAM
64M
HM52
64165FT T
SDR AM
64M
AK411
4VQ
DIR
TC9
246F
2ND PLL
ED
DRIVER
VLC
VLC
VLC
50KLPF
SW->R
SW->L
C->L
SL->L
C->R
SR->R
RX0
RX1
RX2
RX3
TX0
RX4
RX5
DAUX
RX6
RX7
RN1241
RN1241
74HC 4051
Y/C mix
Y/Cmix
MM1512
RSDET
0dB
6d B
6d B
6d B
6d B
6d B
6d B
TC9274N-008
T C9273F-017
-6dB
-6dB
FL TUBE
DIGITAL AUDIO INPUT
OPTICAL 1
OPTICAL 4
OPTICAL3
OPTICAL 2
OPTICAL
VIDEO 5
(FRONT)
COAXIAL 1
COAXIAL 2
COAXIAL 3
AUDIO INPUT
PHONO L
FM/AM
TUNER
PACK
50KLPF
50KLPF
50KLPF
50KLPF
50KLPF
50KLPF
NETWORK
ETHERNET
EEPROM 1K
MAC ADDRESS
93LC46B
10 BASE-
T PHY
CS8900A
(MP3,WMA
DECODER)
COMPONENT
VIDEO
50KLPF
96/24
2CH D/A
AK4528VP
(1/2)
TC9273N-004
COMPOSITE VIDEO OUT
MONITOR
VIDEO 1
VIDEO 2
ZONE 2
MAIN MICRO-
PROCESSOR
M3062FGAFP
Key Matrix
Volume Control
Rec Out LED
Zone 2 LED
FL DRIVER
M66004FP
LC7 2723N
Eur opean model onl y
RDS
DECODER
A
1
2
3
4
5
BCD