Onkyo TX-SR55 User manual

TX-SR55
SERVICE MANUAL
SERVICE MANUAL
AV RECEIVER
Black model
MODEL TX-SR55
120V AC, 60HzBMDD
Ref. No. 3855
122004
RC-591M
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-SR55
SPECIFICATIONS
Amplier Section
Video Section
Tuner Section
FM
AM
General
Video Inputs
Video Outputs
Audio Inputs
Audio Outputs
Other Jacks
Specifications and features are subject to change without
notice.
Power Output
(2 channels driven): 85 W + 85W (8 ,20Hz–20kHz, FTC)
120 W +120 W (6 ,1kHz,DIN)
150 W + 150 W (6 ,1kHz,JEITA)
Dynamic Power 220 W + 220 W (3 ,Front)
165 W + 165 W (4 ,Front)
100 W + 100 W (8 ,Front)
THD (Total Harmonic
Distortion) 0.08 % (Power Rated)
Damping Factor 60 (Front,1kHz,8 )
Input Sensitivity and
Impedance 200 mV/ 47 k (LINE)
Output Level and
Impeadance 200 mV/ 470 (REC OUT)
Frequency Response 10 Hz–100 kHz/ +1 dB-3 dB (Direct
mode)
Tone Control ±10 dB, 50 Hz (BASS)
±10 dB, 10 kHz (TREBLE)
SN Ratio 106 dB (LINEIHF-A)
Speaker Impedance 6 –
Input Sensitivity/Output
Level and Impedance 1Vp-p /75 (Component and S-VideoY)
0.7 Vp-p /75 (Component Pb/Cb,Pr/Cr)
0.28 Vp-p /75 (S-Video C)
1 Vp-p /75 (Composite)
Component Video
Frequency Response 5 Hz – 50 MHz
Tuning Frequency Range 87.5 MHz– 107.9 MHz
Usable Sensitivity Stereo:17.2 dBf 2 µV(75 IHF)
Mono: 11.2 dBf 1 µV(75 IHF)
S/N Ratio Stereo: 70 dB (IHF-A)
Mono:76 dB (IHF-A)
THD Stereo: 0.3 % (1kHz)
Mono:0.2 % (1kHz)
Frequency Response 30 Hz–15 kHz / ±1 dB
Stereo Separation 45 dB ( 1kHz )
Tuning Frequency Range 530 kHz–1700 kHz
Usable Sensitivity 30 µV
S/N Ratio 40 dB
THD 0.70%
Power Supply AC 120 V, 60 Hz
Power Comsumption 6.7A
Stand-by Power
Comsumption 1.0 W
Dimensions(W x H x D) 483 W x 175 H x 430 D mm
19"W x 6-7/8" H x 16-15/16" D inches
Weight 14.5 kg
32.0 lbs
Component Video Inputs 1,2,3
S-VideoCompatibleJack
Inputs DVD,VIDEO1,VIDEO2,VIDEO3,
VIDEO4
A/V Inputs DVD,VIDEO1,VIDEO2,VIDEO3,
VIDEO4
Component Video
Output OUT
S-VideoCompatibleJack
Outputs MONITOR OUT,VIDEO1,VIDEO2
A/V Outputs MONITOR OUT,VIDEO1,VIDEO2
Digital Inputs Optical : 3, 1 (Front Panel)
Coaxial : 2
Analog Inputs DVD(MULTICHANNEL),VIDEO1,
VIDEO2,VIDEO3,VIDEO4,TAPE,CD
Multichannel Inputs 6
Digital Outputs 1 (Optical )
Analog Outputs TAPE,VIDEO1,VIDEO2
Subwoofer Pre Outputs 1
Speaker Outputs 9
Phones 1
RS-232 Control 1
IR Input/Output 1
12V Trigger Out 3

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 and hold down the VIDEO-1 button, then press the
STANDBY/ON button.
2.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.
3. Unplug the power supply cord.
3. Safety-check out
(U.S.A. model only)
After correcting the original service problem, perform the
following safety check before releasing the set to the customer.
Leakage Current Check
Measure leakage current to a known earth ground(water pipe,
conduit, etc.) by connecting a leakage current tester between
the earth ground and exposed metal parts of the appliance
(input/output terminals, screwheads,metal overlays, etc.).
Plug the power supply cord directly into a 120V AC 60 Hz outlet
and turn Standby switch on.Any current meausred must not
exceed 0.5mA.
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
F6901,F6902 252301 or 12A-TUL-250V or
252196 12A-UL/T-314,Fuse
F901 252199 10A-UL,Fuse
F903 252164 or 5A-UL/T-237 or
252258 5A-T/UL-ST2,Fuse
F9501 252160 or 2.5A-UL/T-237 or
252254 2.5A-T/UL-ST2,Fuse
TX-SR55
SERVICE PROCEDURES

A038
A039
U3
A033
A037
A070
U11
A187
A031
A059
A031
A046
A091
A031 A031
A036
A031
U33
A031
A031
A042
A031
A211
A031
A101
Q6050
Q6055
Q6064
Q6066
A031
Q6050A
A151
A031
A031
A031
A031
T901
A070
A196
A057
E800
A056
A041 A018
A011
A006
A001
A031
A176
A017
A026
A051
A206
A201
A196
A029
A050
A013
A206
A201
A216 A101
Q6050A
A031
A031
A081
U2
U27
U36
U18 U21
U22
U12
U32
U26
U30
U31 U29
U6
U19
U5
U16
U17
U7
U13
U4
U1
P761
P7502
P6931
P7501
F903F901
F9501
F6902
F6901
U14
U23
A016
A045
A021
A043
A161
A161
A161 A189
A188
TX-SR55
EXPLODEDVIEW
TX-SR55
A
1
2
3
4
BCDE

TX-SR55
BLOCK DIAGRAM Amplifier section
TAPE_OUT_R TAPE_OUT_L
V2_OUT_L V2_OUT_R V1_OUT_L V1_OUT_R
Z2_R
Z2_L
MIX_R
MIX_L
SOURCE_L
SOURCE_R
RECOUT_L
RECOUT_R
MCH_SR MCH_SL MCH_SW MCH_CT
ADLT+ ADRT+ ADLT- ADRT-
ADRT- ADRT+ ADLT+ ADLT-
RX0
RX1
RX2
RX3
RX4
RX5
TX
RX6
DAC_FL DAC_CT DAC_SW DAC_FR DAC_SR DAC_SBR DAC_SBL DAC_SL
VOLIN_SBR
VOLIN_SBL
MIC
TUNER PACK
VIDEO4
NJW1157
CD
TAPE OUT
TAPE IN
VIDEO3 IN
VIDEO2 OUT
VIDEO2 IN
VIDEO1 OUT
VIDEO1 IN
DVD
MSL/MSR
MC/MSW
COAX 1
COAX 2
Digital Input
OPT FRNT
OPT1
OPT2
OPT3
OPT
Digital Output
-6dB
-6dB
+9.7dB
TC9162
DIR
2ch ADC
CS42518 8ch DAC
+6dB
VLSCLPF
TONE
TONE
MIC AMP
+6dB +6dB
VLSCLPF
+6dB
VLSCLPF
+6dB
VLSCLPF
LPF VLSC
VLSCLPF
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
73
73
51
74
41
43
23
25
22
24
26
21
27
29
28
30
44
42
46
45
48
47
93
92
91
95
90
89
88
86
85
84
83
87
82
81
80
94
9
8
12
17
10
19
20
21
11
18
4
25
3
26
2
27
22
7
23
6
5
24
16
15
14
13
49
48
43
42
47
46
45
44
50
37 36
17
19
35 34 32 33 31 30 28 29 26 27
+
+
A
A
A
A
A
1
2
3
4
5
BCD

TX-SR55
BLOCK DIAGRAM Amplifier section
Z2RL SBRL HPRL HPIN FRL CSRL
FL_PO
FR_PO
CT_PO
SBL_PO
SBR_PO
SW_PO
SL_PO
SR_PO
SBMUT Z2LMUT AMUT
Z2SW_PO
Z2L_PO
Z2R_PO
DC24 in for
A-BUS
40k IR in1 for
A-BUS
40k IR in2 for
A-BUS
56k IR OUT for
A-BUS
12V TRIGGER A
12V TRIGGER B
12V TRIGGER C
IR IN
IR OUT
RJ-45 for
A-BUS
RIex
RS-232C
12V TRIDDER
CONTROL
IR 56k
RE-MODULATOR
IR
DE-MODULATOR
IR
DE-MODULATOR
RI
INTERFACE
INTERFACE
RS-232C
SW
POWER AMPLIFIER
+29dB
+29dB
+29dB
+29dB
+29dB
+29dB
+29dB
PREOUT
FRONT LEFT
FRONT RIGHT
CENTER
SURR. LEFT
SURR. RIGHT
HEADPHONES
ZONE2 LEFT
ZONE2 RIGHT
SUUR. BACK
LEFT
SUUR. BACK
RIGHT
SPEAKER TERMINALS
R
L
SW
TONE
TONE
+6dB@ZONE2
+20.2dB
TONE
TONE
DSP SD_RAM
IC42S16100
2M Byte
CS494003
FLASH ROM
MX29LV040
2M Bit
LPF VLSC
+6dB
VLSCLPF
+6dB
VLSCLPF
+6dB
ZONE2 PREOUT/LINEOUT
BD3814
7
6
5
4
3
2
1
8
107
118
106
81
80
86
134
109
110
58
54
63
62
64
1
26 27 21 20 22 23
27
28
A
A
A
1
2
3
4
5
BCD

TX-SR55
BLOCK DIAGRAM Video section
VIDEO1
DVD
VIDEO2
VIDEO3
VIDEO4
S VIDEO INPUT
DVD
VIDEO1
VIDEO2
VIDEO3
VIDEO4
Y
C
YC
YC
Y
C
YC
COMPOSITE VIDEO INPUT
COMPONENT VIDEO INPUT
Y1
CB1
CR1
Y2
CB2
CR2
Y3
CB3
CR3
NJM2595
Y
NJM2595
NJM2595
C
OSD
LC74763-9836
DAC
A
DAC
B
DAC
C
DAC
D
DAC
E
DAC
F
AIN2
AIN1
AIN3
AIN4
AIN5
OSD*(SDET+SI)
SDET*{OSD+(OSD*SI)}
SDET*{OSD+(OSD*SI)}
SDET*OSD
C2
DIGITAL VIDEO ENCO
D
ADV7172
DIGITAL VIDEO DECODER
ADV7183A
Y1
COMPOSITE
C1
COMPOSITE / Y2
6dB
6dB
6dB
6dB
6dB
6dB
6dB
6dB
6dB
0dB
0dB
-6dB
-6dB
-6dB
-6dB
A
1
2
3
4
5
BCD

TX-SR55
BLOCK DIAGRAM Video section
COMPONENT VIDEO OUTPUT
Y
CB
CR
A
B
COMPOSITE VIDEO OUTPUT
MONITOR
VIDEO1
VIDEO2
VIDEO2
CY
CY
VIDEO1
CY
MONITOR
V
Y
C
CB
CR
Y
DACA
DACB
DACC
DACD
DACE
DACF
LA7106M
S VIDEO OUTPUT
SDET*OSD
SDET*OSD
SDET*{OSD+(OSD*SI)}
LA7106M
SDET*{OSD+(OSD*SI)}
SDET*{OSD+(OSD*SI)}
SDET*{OSD+(OSD*SI)}
ENCODER
7
2
6dB 6dB 6dB
6dB
6dB
6dB
A
1
2
3
4
5
BCD

TX-SR55
BLOCK DIAGRAM
A
1
2
3
4
5
BCDEFGH
Z2RL SBRL HPRL HPIN FRL CSRL
FL_PO
FR_PO
CT_PO
SBL_PO
SBR_PO
SW_PO
SL_PO
SR_PO
TAPE_OUT_R TAPE_OUT_L
V2_OUT_L V2_OUT_R V1_OUT_L V1_OUT_R
Z2_R
Z2_L
MIX_R
MIX_L
SOURCE_L
SOURCE_R
RECOUT_L
RECOUT_R
MCH_SR MCH_SL MCH_SW MCH_CT
ADLT+ ADRT+ ADLT- ADRT-
ADRT- ADRT+ ADLT+ ADLT-
RX0
RX1
RX2
RX3
RX4
RX5
TX
RX6
DAC_FL DAC_CT DAC_SW DAC_FR
SBMUT Z2LMUT AMUT
DAC_SR DAC_SBR DAC_SBL DAC_SL
Z2L_PO
Z2R_PO
VOLIN_SBR
VOLIN_SBL
MIC
TUNER PACK
VIDEO4
NJW1157
CD
TAPE OUT
TAPE IN
VIDEO3 IN
VIDEO2 OUT
VIDEO2 IN
VIDEO1 OUT
VIDEO1 IN
DVD
DC24 in for
MSL/MSR
A-BUS
40k IR in1 for
A-BUS
MC/MSW
40k IR in2 for
A-BUS
56k IR OUT for
A-BUS
COAX 1
COAX 2
Digital Input
OPT FRNT
OPT1
OPT2
OPT3
OPT
Digital Output
12V TRIGGER A
12V TRIGGER B
12V TRIGGER C
IR IN
IR OUT
RJ-45 for
A-BUS
RIex
RS-232C
12V TRIDDER
CONTROL
IR 56k
RE-MODULATOR
IR
DE-MODULATOR
IR
DE-MODULATOR
RI
INTERFACE
INTERFACE
RS-232C
SW
POWER AMPLIFIER
+29dB
+29dB
+29dB
+29dB
+29dB
+29dB
+29dB
PREOUT
FRONT LEFT
FRONT RIGHT
CENTER
SURR. LEFT
SURR. RIGHT
HEADPHONES
ZONE2 LEFT
ZONE2 RIGHT
SUUR. BACK
LEFT
SUUR. BACK
RIGHT
SPEAKER TERMINALS
R
L
TONE
TONE
+6dB@ZONE2
-6dB
-6dB
+9.7dB
+20.2dB
TC9162
DIR
2ch ADC
CS42518 8ch DAC
+6dB
VLSCLPF
TONE
TONE
MIC AMP
DSP SD_RAM
IC42S16100
2M Byte
CS494003
FLASH ROM
MX29LV040
2M Bit
+6dB +6dB
VLSCLPF
+6dB
VLSCLPF
+6dB
VLSCLPF
LPF VLSC
+6dB
VLSCLPF
+6dB
VLSCLPF VLSCLPF
+6dB
ZONE2 PREOUT/LINEOUT
BD3814
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
73
73
51
74
41
43
23
25
22
24
26
21
27
29
28
30
44
42
46
45
48
47
93
92
91
95
90
89
88
86
85
84
83
87
82
81
80
7
6
5
4
3
2
1
94
8
9
8
12
17
10
19
20
21
11
18
4
25
3
26
2
27
22
7
23
6
5
24
16
15
14
13
49
48
43
42
47
46
45
44
50
37 36
17
19
107
118
106
81
80
86
134
109
110
58
54
63
62
64
1
35 34 32 33 31 30 28 29 26 27 21 20 22 23
27
28
+
+
A
A
A
A

TX-SR55
BLOCK DIAGRAM Video section
A
1
2
3
4
5
BCDEFGH
VIDEO1
DVD
VIDEO2
VIDEO3
VIDEO4
S VIDEO INPUT
DVD
VIDEO1
VIDEO2
VIDEO3
VIDEO4
Y
C
YC
YC
Y
C
YC
COMPOSITE VIDEO INPUT
COMPONENT VIDEO INPUT
Y1
CB1
CR1
Y2
CB2
CR2
Y3
CB3
CR3
COMPONENT VIDEO OUTPUT
Y
CB
CR
A
B
NJM2595
Y
NJM2595
NJM2595
C
COMPOSITE VIDEO OUTPUT
MONITOR
VIDEO1
VIDEO2
VIDEO2
CY
CY
VIDEO1
CY
MONITOR
OSD
LC74763-9836
V
Y
C
CB
CR
Y
DACA
DACB
DACC
DACD
DACE
DACF
AIN2
AIN1
AIN3
AIN4
AIN5
LA7106M
S VIDEO OUTPUT
SDET*OSD
OSD*(SDET+SI)
SDET*{OSD+(OSD*SI)}
SDET*{OSD+(OSD*SI)}
SDET*OSD
SDET*{OSD+(OSD*SI)}
SDET*OSD
LA7106M
SDET*{OSD+(OSD*SI)}
SDET*{OSD+(OSD*SI)}
SDET*{OSD+(OSD*SI)}
C2
DIGITAL VIDEO ENCODER
ADV7172
DIGITAL VIDEO DECODER
ADV7183A
Y1
COMPOSITE
C1
COMPOSITE / Y2
6dB
6dB
6dB
6dB
6dB
6dB
6dB
6dB
6dB
0dB
0dB
-6dB
-6dB
-6dB
-6dB
6dB 6dB 6dB
6dB
6dB
6dB