Service Manuals, User Guides, Schematic Diagrams or docs for : ONKYO Audio TX-NR808 hfe_onkyo_tx-nr808_service_en
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TX-NR808
Ref. No. 4208
062010
SERVICE MANUAL
AV RECEIVER
MODEL TX-NR808(B)/(S)
Black and Silver models RC-771M
B MDC, B MDF 120V AC, 60Hz
B MMP, B MMA, B MMB, S MMP 220-240V AC, 50/60Hz
B MMR, B MMQ 220-240V 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.
TX-NR808
SERVICE PROCEDURE-1
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
F2000 FUSE 4A-UL/T-233 252325GR !
F2000 or FUSE 4A-T/UL-ST2 252257GR !
F2001 FUSE 3.15A-UL/T-233 252323GR !
F2001 or FUSE 3.15A-T/UL-ST2 252256GR !
F6901 FUSE 15A-TUL-250V 252303GR !
F6901 or FUSE 15A-UL/T-314 252197GR !
F6902 FUSE 15A-TUL-250V 252303GR !
F6902 or FUSE 15A-UL/T-314 252197GR !
F901 FUSE 12A-TUL-250V 252301GR !,
F901 FUSE 12A-UL/T-314 252196GR !,
F901 or FUSE 6.3A-SE-EAK 252079GR !,
F901 or FUSE 6.3A-SE-TL250V 252279GR !,
: 120V,Canadian model : 230V,Australian model
: 120V,Taiwanese model : 220/230-240V,Hong kong model
: 230V,CE(European) country model : 220/230-240V,Chinese model
: 230V,UK model
2. Safety check out
(U.S.A. model only)
After correcting the original service problem, perform the following safety check before releasing the unit to the customer.
Leakage current Check
Measure the leakage current to a known earth ground (water pipe or conduct etc.) by connecting a leakage current
tester between the earth ground and exposed metal parts of the unit (input/output ground terminals, screw heads or metal overlays etc.).
Plug the power supply cord directly into a 120Vac 60Hz wall socket and turn ON/STANDBY button on.
Any current measured must not exceed 0.5mA.
3. Memory Backup
This model uses a EE-PROM IC in order to retain radio presets and other settings. So, memory contents will be
kept eternally with no care.
4. To initialize the unit
1. ON/STANDBY (Power On)
ON/STANDBY VCR/DVR
2. VCR/DVR + ON/STANDBY.
Cle a r Stand-by
Preset memory and each mode stored in the memory, are
initialized and will return to the factory settings.
TX-NR808
SERVICE PROCEDURE-2
5. To check version of Microprocessor, DSP and Video FW(Firmware)
1. ON/STANDBY (Power On)
2. DISPLAY + ON/STANDBY.
[e.g.] TX-NR808
Main :
1 .03/1 0 7 2 9 A M
3. TONE [Tone ] ---> Forward [ ] : DTR-40.2/ 50.2, DHC-40.2
TONE [Tone ] ---> Reversed.
FW Version displayed
only for 3 seconds.
TONE
Ma in:
1.0 3 /10729A M Main Microprocessor
TONE TONE
DS P 1 st/NE T:
1 .06/1 0 9 2 2 A M7 1st DSP/NET (DA830)
TONE TONE
DS P 2 n d :
1.0 0 /10429aM A 2nd DSP
TONE TONE
V ideo:
1 .02/1 0 7 2 9 A S Video Microprocessor
TONE TONE
V S P (S equoia ):
1 .03/1 0 7 0 9 A MA VSP (Video Signal Processor)
TONE
4. ON/STANDBY (Power Off).
TONE
ON/STANDBY TONE DISPLAY
TX-NR808
A065 A435
EXPLODED VIEWS-1 x 7 pcs. L=10mm
OVERALL U0020 A715
x 3 pcs. A703
A261 U0021 U0027
A275 A269 x 5 pcs. A143
A281 A137
x 2 pcs. A245 A143 x 2 pcs. U0022 U0026
A285
A271 U0025 A701
A251
A283 A267 U0024
x 7 pcs. A702 D6901
A259 x 2 pcs. U0012
x 8 pcs. A067 A717
U0050 x 6 pcs.
A273 P900 A705
x 2 pcs.
A263 U0011 A072 Q6068
x 2 pcs. Q6066
U0051 A165 Q6060 Q6061 Q6064
A257
x 10 pcs. A157
Q6065
A255
x 12 pcs. U007 U0054 A160 Q6067
P8002 x 3 pcs.
A181
x 7 pcs. A169 Q6061A
x 2 pcs. Q6054
A435
U0041 P2101 L=15mm A063 Q6058 A051
A153 x 6 pcs.
U011 x 14 pcs. Q6056
A048 Q6051A A047
A131 A069 Q6051 x 6 pcs. A049 A050
P103 x 6 pcs. Q6050
P906 A046 A061 U0010 Q6055 A163
A077 x 2 pcs. Q6060A
x 20 pcs. x 6 pcs. Q6057
F2000 A045
A155
F2001 A149
U0052 A148 Q6050A
x 2 pcs.
A129 A143 P062 F6901
x 2 pcs.
A147 U0029
U0040
P061 x 4 pcs.
A127 A147 A071 F6902
x 2 pcs. x 4 pcs. x 2 pcs.
P6600A P6600A U0030
x 2 pcs. x 14 pcs. A133 A247
A177 A179
x 3 pcs. x 4 pcs. T901 A089
A161 A167
A119 L=40mm x 5 pcs.
U0032 x 4 pcs. A153
A154
A125 A081
F901E A159
F901
A141 x 4 pcs. Refer to
A151 EXPLODED VIEWS-2
P6600A
x 6 pcs. A163
P9008 U0031 A135 A155
U0034 A087 U0065
L=40mm
A177 A155
x 3 pcs. A089
L=3mm
A083
x 4 pcs. A171
A085 x 9 pcs.
x 4 pcs.
A121 A093
x 3 pcs. x 4 pcs.
A152
TX-NR808
POWER SWITCH SECTION
EXPLODED VIEWS-2 MMP, MMA, MMB, MMQ, MMR type
FRONT SECTION A509
x 2 pcs.
P8641 A507
x 2 pcs.
U00610 P7501 P9008
P3101 U0069
A423
A431 x12 pcs.
U0066 A505
U0081 U0060 A419
A429 U0064
A417 A447
A435 x 3 pcs.
A421 A435
L=10mm
A401 L=20mm
U0068 A435 A467
A425 U0063 L=20mm A465
x 3 pcs. A409 A463
A449 A435 A411 A477
U0061 L=10mm x 2 pcs.
A433 U0062 A461
A427 A403
x 2 pcs. A457 A459
JL4103 U0067
A455
A435 A469
L=20mm A485
A401B A413
A453 A435 A405 A437
x 2 pcs. L=20mm
A407 A493
A451 x 2 pcs.
A491
A473 A517
A515
A439 A439 A441 A471
3TTB+10B 3TTB+10B 3P+6FN
A475 3TTB+10B A479
3P+6FN 3P+6FN
TX-NR808
A443 A443 A501
A445 3TTB+8B
3TTB+8B 3TTB+8B
A445 A445
3TTB+8B --- Bottom View --- 3TTB+8B
TX-NR708/808/1008, TX-NA708/808/1008, HT-RC270, DTR-40.2/50.2, DHC-40.2
A B C D E F G H I J K
SCHEMATIC DIAGRAMS - 1
BLOCK DIAGRAM AUDIO SECTION
except onk JJ HEADPHONES
1 TUNER UNIVERSAL
PACK PORT
POWER AMPLIFIER
Z3L MAINR
L 83 L
Z3R 1 SPEAKER TERMINALS
2 22 SL FL
TONE +29dB
R 82 R 23 SL
FRONT LEFT
for US SIRIUS_L 24
57 L Down mix : No use
SIRIUS SIRIUS SIRIUS_R
R2A15220FP MAINL
1
Tone : Use for Z3
FR
+29dB
56 R
2 20 SR
TONE
SPRLF FRONT RIGHT
19 SR
60 L MAINL
L
AUDIO IN 18
SL(DAC) 43 SL(DAC) C
(FRONT) R 61 R MAINR 43 +29dB
2 91
91
MCH SL
1
2
16 C
SPRLC CENTER
65 L L
L ADCL
53
SR(DAC) 42 SR(DAC)
PHONO (MM) Z3 17
64 R R SL/Z3L
R 54
708:Z2 mirror
90 MCH SR
+29dB
SURR
90 15
L
PHONO EQ 67 L
ADCR
0/-6/-12/-18dB
1
LEFT
39 C(DAC) 2 Ref. GND
TUNER 14 SW
( for onk JJ ) R 66 R 93 MCH C
SR/Z3R
+29dB
SURR
38 SW(DAC) 13
69 L SPRLSR
L
+
L
SUB1L
46
1
RIGHT
MAIN
SRC
TV/CD IN 92 MCH SW
2
68 R
R R 47
10
SBL/Z2L/Bi_L/LH
34
34
FL(DAC)
11
FL +29dB SUR. BACK
L 71 L
SUB1R
-6dB
/ Bi Amp
95 FL(MIX)
3 PC IN
2 12 LEFT
R 70 R inverted down mix
41 FL
SLC
1
priority terminal
41
SBR/Z2R/Bi_R/RH
8
+29dB SUR. BACK
L 73 L 40 FR
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