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TX-SR503/503E/8350
Ref. No. 3863
042005
SERVICE MANUAL
AV RECEIVER
MODEL TX-SR503
MODEL TX-SR503E ON STANDBY
REMOTE MODE
MODEL TX-SR8350
RECEIVER DVD
TAPE/AMP
INPUT SELECTOR MD
1 2 3 CD
CDR
V1 V2 V3
4 5 6 TV
MULTI CH DVD
7 8 9 VCR
TAPE TUNER CD
+10 0 CLR SAT
10 11 12
CABLE
--/--- DIMMER SLEEP
TV VOL CH VOL
TUNING / PRESET MASTER VOLUME DISC
INPUT
GUIDE PREVIOUS
TOP MENU MENU
STANDBY/ON
SP A / B MUTING
ENTER ENTER
STANDBY
RETURN SETUP
A SPEAKERS B TONE + STEREO LISTENING MODE DISPLAY DIGITAL INPUT DIMMER MEMORY TUNING MODE RETURN SETUP
CLEAR
LISTENING MODE
VIDEO 3 INPUT STEREO SURROUND
PHONES L AUDIO R
VIDEO AUDIO SUBTITLE RANDOM REPEAT
MULTl CH DVD VIDEO 1 VIDEO 2 VIDEO 3 TAPE TUNER CD
TEST TONE CH SEL LEVEL- LEVEL+
PLAY MODE HDD DVD
DISPLAY L NIGHT CINE FLTR
VCR
RC-607M
RC-607M
TX-SR503 Black and Silver and Golden models
B MDD, B MDC, S MDC 120V AC, 60Hz
B MPA, S MPA 230-240V AC, 50Hz
B MWT, S MWT, G MWT 120V/220-230V AC, 50/60Hz
G MGR, G MGQ, G MGK 220-230V AC, 50/60Hz
TX-SR503E Black and Silver models
B MPP, S MPP 230-240V AC, 50Hz
TX-SR8350 Golden model
G MGR 220-230V AC, 50/60Hz
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.
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TX-SR503/503E/8350
SPECIFICATIONS
Amplifier Section General
Power Output Power Supply North American: AC 120 V, 60 Hz
2 channel driven: North American: 75 W + 75 W Australian and European:
(8 ,20Hz-20kHz, FTC) AC 230-240 V, 50 Hz
European: 100 W + 100 W Others: AC 120/220-240 V, 50/60 Hz
(6 , 1kHz, DIN) AC 230-240 V, 50Hz
Asian, Australian: 130 W + 130 W AC 220-230 V, 50 Hz
(6 , 1kHz, JEITA) Power Consumption North American: 6.2 A
Dynamic Power 180 W + 180 W (3 , Front) Others: 590 W
140 W + 140 W (4 , Front) Stand-by Power Consumption North American: 0.1 W
95 W + 95 W (8 , Front) Australian and European: 0.2 W
THD Others: 0.5 W
(Total Harmonic Distortion) 0.08% (Power Rated) Dimensions
Damping Factor 60 (Front, 1kHz, 8 ) (W x H x D) 435 x 150 x 374 mm
Input Sensitivity and Impedance 200 mV/ 47 k (LINE) 17-1/8" x 5-7/8" x 14-3/4"
Output Level and Impedance 200 mV/ 470 (REC OUT) Weight North American: 9.4 kg
Frequency Response 10 Hz-100 kHz/ +1 dB-3 dB (Direct 20.7 lbs.
mode) European: 10.1 kg
Tone Control 10 dB, 50 Hz (BASS) 22.3 lbs
10 dB, 20 kHz (TREBLE) Others: 10.2 kg .
Signal to Noise Ratio 100 dB (LINE, IHF-A) 22.5 lbs.
Speaker Impedance North American: 6 - Video Inputs
Others: 4 - or 6 - Component DVD, VIDEO1, VIDEO2
S-Video DVD, VIDEO1, VIDEO2
Video Section Composite DVD, VIDEO1, VIDEO2, VIDEO3
Input Sensitivity/Output Level Video Outputs
and Impedance 1 Vp-p /75 (Component and S-Video Y) Component MONITOR
0.7 Vp-p /75 (Component Pb/Cb, Pr/Cr) S-Video MONITOR OUT, VIDEO1
0.28 Vp-p /75 (S-Video C) Composite MONITOR OUT, VIDEO1
1 Vp-p /75 (Composite)
Component Video Audio Inputs
Frequency Response 5 Hz - 50 MHz Digital Inputs Optical: 3
Coaxial: 1
Tuner Section Analog Inputs DVD(MULTICHANNEL), VIDEO1,
VIDEO2, VIDEO3, TAPE, CD
FM Multichannel Inputs 6
Tuning Frequency Range North American: 87.5 MHz- 107.9 MHz
Other: 87.5 MHz- 108.0 MHz Audio Outputs
Usable Sensitivity Stereo: 17.2 dBf 2 V(75 IHF) Analog Outputs TAPE, VIDEO1
Mono: 11.2 dBf 1 V(75 IHF) Subwoofer Pre Outputs 1
Signal to Noise Ratio Stereo: 70 dB (IHF-A) Speaker Outputs SP A (L, R, C, SL, SR, SBL, SBR)
Mono: 76 dB (IHF-A) SP B (L, R)
THD Stereo: 0.3% (1kHz) Phones 1
Mono: 0.2% (1kHz)
Frequency Response 30 Hz-15 kHz / 1 dB
Specifications and features are subject to change without notice.
Stereo Separation 45 dB (1kHz)
AM
Tuning Frequency Range North American: 530 kHz-1710 kHz
Others: 522 kHz-1611 kHz
Usable Sensitivity 30 V
Signal to Noise Ratio 40 dB
THD 0.70%
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TX-SR503/503E/8350
SERVICE PROCEDURE
1. Replacing the fuses
This symbol located near the fuse indicates that the
fuse used is show 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 utilise est e lent.
Pour une protection permanente, n'utiliser que des fusibles de meme
type. Ce demier est indique la qu le present symbol est apposre.
REF NO. PART NAME DESCRIPTION PART NO. REMARKS
F901 FUSE 8A-UL 252198 !,
F901 or FUSE 8A-T/UL-ST2 252261 !,
F901 FUSE 4A-SE-EAK FUSE 252077 !,
F901 or FUSE 4A-SE-TL250V 252243 !,
F901 or FUSE 4A-SE-TL250V 252277 !,
F902 FUSE 4A-SE-EAK FUSE 252077 !,
F902 or FUSE 4A-SE-TL250V 252243 !,
F902 or FUSE 4A-SE-TL250V 252277 !,
F902 FUSE 4A-SE-EAK FUSE 252077 !, , <8350>
F902 or FUSE 4A-SE-TL250V 252243 !, , <8350>
F902 or FUSE 4A-SE-TL250V 252277 !, , <8350>
F903 FUSE 5A-UL/T-237 252164 !,
F903 or FUSE 5A-T/UL-ST2 252258 !,
F903 FUSE 2.5A-SE-EAK FUSE 252075 !,
F903 or FUSE 2.5A-SE-TL250V 252241 !,
F903 or FUSE 2.5A-SE-TL250V 252275 !,
F903 FUSE 2.5A-SE-EAK FUSE 252075 !, , <8350>
F903 or FUSE 2.5A-SE-TL250V 252241 !, , <8350>
F903 or FUSE 2.5A-SE-TL250V 252275 !, , <8350>
F6901 FUSE 10A-UL 252199 !
F6902 FUSE 10A-UL 252199 !
: TX-SR503 USA model only : TX-SR503 Chinese model only
: TX-SR503 Canadian model only : TX-SR503 Hong kong model only
: TX-SR503E European model only : TX-SR503 Korean model only
: TX-SR503 Australian model only <8350> : TX-SR8350 Chinese model only
: TX-SR503 World wide model only
2. To initialize the unit
1. Press and the hold down the VIDEO 1/VCR button , then press the STANDBY/ON button when the unit is Power on.
2. After " C l ea r " is displayed, the preset memory and each mode stored in the memory, are initialized and will return to
the factory settings.
3. To check version of microprocessor
Main microprocessor Q701 only.
1. Press and the hold down the DISPLAY button , then press the STANDBY/ON button when the unit is Power on.
Version is displayed on FL display only for 3 seconds.
Ex.
V e r.1 .0 1 /0 5 3 0 5 a
2. Press the STANDBY/ON button to Power off.
4. Memory Backup
The AV receiver 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 AV receiver must be plugged into an AC outlet in order to charge the
backup system. Once it has been charged, the AV receiver will retain the settings for several weeks,
although this depends on the environment and will be shorter in humid climates.
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TX-SR503/503E/8350
OPERATION CHECK-1
SPEAKER PROTECT-1 (DC VOLTAGE DETECTION)
[When]
1. Exchange power transistors (Q6050 - Q6066).
2. Exchange amplifier PC board ass'y (NAAF-8523).
[Procedure]
No load. No input.
1. Press and the hold down the CD button , then press the STANDBY/ON button when the unit is Power ON.
" Test - _ " is displays it only for 5 seconds.
Test - _ Blinks
2. Press the VIDEO 3 button, while the character of " Test - _ " is displayed.
Unit will be in the state of " Test-4-00 ".
T e s t - 4 -0 0
3. Repeatedly press TONE+ button until the character of " Test-4-21 " is displayed.
T e s t - 4 -2 1
Checking the operation starts automatically as follows.
T e s t - 4 -2 1
Front L ch
Check
P r o te c t OK Test - 4-25
Surround R ch
P r ot e c t O K Check
T e s t - 4 -2 2
Front R ch
Check
P r o te ct O K Test - 4-26
Surround Back L ch
Check
T e s t - 4 -2 3 P r ot e c t O K
Center ch
Check
P r o te ct O K Test - 4-27
Surround Back R ch
Check
T e s t - 4 -2 4 P r ot e c t O K
Surround L ch
Check
P r o te ct O K P r ot e c t
If all channel are OK, the character of " Test - 4 - 35 " is displayed.
T e s t - 4 -3 5
4. Press the STANDBY/ON button.
Turn off
Cl e a r
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TX-SR503/503E/8350
OPERATION CHECK-2
SPEAKER PROTECT-2 (CURRENT DETECTION)
[When]
1. Exchange power transistors (Q6050 - Q6066).
2. Exchange amplifier PC board ass'y (NAAF-8523).
[Procedure]
No input.
Do not check two or more channels at the same time.
Do not connect dummy load to speaker terminals fro seconds 2 or more.
1. Press and the hold down the CD button , then press the STANDBY/ON button when the unit is Power ON.
" Test - _ " is displays it only for 5 seconds.
Test - _ Blinks
2. Press the VIDEO 3 button, while the character of " Test - _ " is displayed.
Unit will be in the state of " Test-4-00 ".
T e s t - 4 -0 0
3. Repeatedly press TONE+ button until the character of " Test-4-35 " is displayed.
T e s t - 4 -3 5
4. Connect the Dummy load of 3 ohms to the Front Lch speakers terminal.
At this time, check the speaker relay is not turned off.
T e s t - 4 -3 5
5. Connect the dummy load of 1 ohm to the Front Lch speakers terminal.
At that time, you check the speaker relay is turned off and " Protect " is displayed.
P r o te c t
Disconnect the dummy load at once when check the display of " Protect ".
T e s t - 4 -3 5
6. Check other channels according to the same procedure.
7. Press the STANDBY/ON button.
Turn off
Clear
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TX-SR503/503E/8350
OPERATION CHECK-3
CONTROL OF POWER SUPPLY (OUTPUT SENSOR AND THERMAL SENSOR)
[When]
1. Exchange power transistors (Q6050 - Q6066).
2. Exchange power amplifier PC board ass'y (NAAF-8523).
3. Exchange thermal sensor PC board ass'y (NAETC-8526).
[Procedure]
No output. No input.
Output sensor
1. Press and the hold down the CD button , then press the STANDBY/ON button when the unit is Power ON.
" Test - _ " is displays it only for 5 seconds.
T e st - _ Blinks
2. Press the VIDEO 3 button, while the character of " Test - _ " is displayed.
Unit will be in the state of " Test-4-00 ".
T e st - 4 -0 0
3. Repeatedly press TONE+ button until the character of " Test-4-37 " is displayed.
T e st - 4 -3 7
4. Adjusts MASTER VOLUME to Max. position.
At this time, check the character of " FM STEREO " displayed.
And, check relay RL6901 and RL6902 are turned off in 2 - 3 seconds.
FM STEREO
T e st - 4 -3 7
5. Press the STANDBY/ON button.
Turn off
Cl e a r
Thermal sensor
1. Press and hold down the DISPLAY button, then press the STANDBY button when the unit is power ON.
" V e r . 0. 50 /0 5 1 31 a " is displays it only for 2 seconds.
V e r. 0 .5 0 /0 5 1 3 1a
2. Press the TONE button, while the character of " Ver.0.50/05131a " is displayed.
T: 25 C/ 77 F
3. Check the displayed temperature is +/-20 C of the ambient temperatures.
4. Press STANDBY/ON button.
Turn off
Cl e a r
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TX-SR503/503E/8350
OPERATION CHECK-4
DSP DEBUG MODE
Check the operation of the circuit around DSP by the display in this mode.
This information helps to pursue the faulty point.
To set in DSP debug mode
1. Press and hold down the DISPLAY button, then press the STANDBY button when the unit is power ON.
" V e r . 0. 50 /0 5 1 31 a " is displays it only for 2 seconds.
V e r. 0 .5 0 /0 5 13 1 a
2. Press the DISPLAY button, while the character of " Ver.0.50/05131a " is displayed.
E1A48K015FF 23o
To exit
Press STANDBY/ON button.
Content of display
1 2 3 4 5 6 7 8 9 10
--------- DIR --------- ------ MEMORY/DOWNLOAD ----- ------------------------- DSP ----------------------------------------
1 UNLOCK 6 AUTOBOOT DSP AB CODE 8 DSP Status
E = UNLOCK 0 = FLASH 00 = Power off 21 = DSP C HW Config set
= LOCK 1 = ab_ac3_pl2 01 = Power on wait 22 - 2A = DSP C SW Config set
2 = ab_dts_pl2 10 = DSP reset 3F = DSP C kick start
2 Digital Selecter 3 = ab_neo6 11 = DSP reset wait 40 = DSP AB App start
D = DIGITAL
4 = sgen_ab 12 = DSP AB boot ready 41 = DSP AB HW Config set
A = ANALOG
5 = ab_pl2fs 13 = DSP AB boot start 42 - 4B = DSP AB SW Config set
1 = COAX1
6 = ab_dts_6dol 14 = DSP AB boot AF = DSP ab kick start
2 = OOAX2
7 = ab_dts9624 15 = DSP C boot ready
3 = OPT1
8 = aac_pl2 16 = DSP C boot start
4 = OPT2
17 = DSP C boot
5 = OPT3
18 = DSP soft reset
7 = FRONT 7 AUTOBOOT DSP C CODE
20 = DSP C app start
0 = ac_dts9624
3 Sampling Frequency 1 = c_neo6
96 = 96kHz 2 = c_oos_no_sd 9 DSP Detect Format
48 = 48kHz 3 = c_oos 00 = Null 0B = DTS1
44 = 44kHz 4 = c_oob 01 = Dolby Digital 0C = DTS2
32 = 32kHz 5 = c_pl2 03 = Pause 0D = DTS3
-- = Not detect 6 = c_pl2xthx 04 = MPEG1 L1 1B = MPEG2 AAC1
7 = c_thx 05 = MPEG1 L23/ MPEG2 w/o 1C = MPEG2 AAC2
4 Pre Emphasis
8 = c_spsetup 06 = MPEG2 w/e 20 = Silent
K = OFF
9 = version 07 = MPEG2 AAC 22 = DTS CD
e = ON
08 = MPEG2 L1 23 = PCM
5 DIR Status 09 = MPEG2 L2/3
0 = ANALOG
1 = PCM 10 DSP Decode
2 = NOT_PCM o = Decode OK
3 = DATA x = Decode NG
4 = DTSCD -- = Analog in
5 = MCH
6 = NOT DECIED
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TX-SR503/503E/8350
A002
EXPLODED VIEWS-1 x 4 pcs.
WT type
A051
P901
A068
x 37 pcs.
A060 A061
A093 x 6 pcs.
A041 Refer to
in
U17 EXPLODED VIEWS-2
A095 U02
A002 U18
U07
A002
x 3 pcs. A052 A002
P101 A002 x 4 pcs.
U19
F6901 A018 A002
A109 A050
F6902 U08 A046 DD, DC Only
A098 U15 A102
U16 x 2 pcs.
GR Only F6901C A051
U06 U09
A033 A051
P702
A002
x 3 pcs.
U14 A030
x 4 pcs. U05 A050
A002 A002 U01 A001
A002 T901 x 2 pcs. x 4 pcs. A043
x 4 pcs. A044 A002
A017 A006 A002
U03 x 5 pcs.
A014 A002
F903 F903C x 2 pcs. A054 A073
A071
A015
F902 F901 A022
A007
A002 A005
F901C
U04
U11 A070
A1101
TX-SR503/503E/8350
A064 A110
A002 A081
x 4 pcs.
x 3 pcs.
U13 A066
A021 x 8 pcs. A077
A013 x 2 pcs.
x 8 pcs. A020 A068 A068
x 3 pcs. x 8 pcs. x 3 pcs.
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TX-SR503/503E/8350
EXPLODED VIEWS-2
Q6056
Q6066
Q6050A
x 14
A049
x14
Q6055
Q6065
Q6054
Q6064
Q6053
Q6063
Q6052
Q6062
Q6051
Q6061
Q6050
Q6060
TX-SR503/503E/8350
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TX-SR503/503E/8350
A B C D
BLOCK DIAGRAM
TUNER UNIT
1
VIDEO3 IN
51
NJW1157
52
53 41 + 42
46
CD 80
54 43 + 44 45 88
48
55 47
-6dB 81
TAPE OUT 89
56
57 82
90
TAPE IN
58
2 59
27 4
87
95
29 Z2_L 25
60 3
28 26 83
30 Z2_R 2 MIX_L 91
61 27 MIX_R
+9.7dB
-6dB INVERT
62 NJU7311 84
92
63
VIDEO2 IN 21 RECOUT_L 12 7 VOLIN_SBL 85
64 23 93
25
65 22 RECOUT_R 17 22 VOLIN_SBR 86
VIDEO1 OUT 24 94
66 26 11
18
67
VIDEO1 IN SOURCE_L 10 5
68 SOURCE_R 19 24
3 69
9
20
6
23
L
ADRT+
ADLT+
ADRT-
ADLT-
8
FRONT 21
DAC_SBR
DAC_SBL
MCH_SW
DAC_SW
70
MCH_SR
MCH_CT
DAC_SR
MCH_SL
DAC_FR
DAC_CT
DAC_SL
DAC_FL
R
(MULTI INPUT)
TAPE_OUT_R
TAPE_OUT_L
V2_OUT_R
V2_OUT_L
71
L
DVD
SURROUND 73
R
73
CENTER
74
SUBWOOFER
4
DIGITAL IN
ADRT+
ADLT+
ADRT-
ADLT-
COAXIAL 16
15
14 2ch ADC
13
LPF
LPF
LPF
LPF
LPF
RX0 49
36
37
35
34
32
33
31
30
28
29
48
43
RX2 47
OPTICAL 1 RX3 46 DIR
RX4 45
44
42
OPTICAL 2
50
5 OPTICAL 3
8ch DAC
CS42518
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TX-SR503/503E/8350
E F G H
PHONES
POWER
AMPLIFIER
SPEAKERS
+29dB
L
FRONT-A
+29dB
VOLUME
R
1 FL_PO
TONE
+29dB
TONE 2