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HT-RC270
Ref. No. 4214
062010
SERVICE MANUAL
AV RECEIVER
MODEL HT-RC270(B)
Black model RC-768M
B MDC 120V AC, 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.
HT-RC270
A B C D E F G H
EXPLODED VIEWS-1
A715 A703
P921 x 6 pcs.
A253, ONLY
1
A279 A269 A261 A143 A137
A281 x 2 pcs. x 5 pcs. A145 x 2 pcs.
A285 A245 U0013
A283
A267 A251 A029
A241
x 7 pcs. A289 U0011
A259 x 2 pcs. A701
x 7 pcs.
A237A
A705
U0012
Refer to
A263 in
x 2 pcs. U0050 EXPLODED VIEWS-3
A031
2 A257 U0051 x 3 pcs.
x 10 pcs. A037
A264 U0054 F6901
A255 U007 F6902
x 12 pcs.
A181 P8002
x 5 pcs. A197
P8641 U0010 A017 x 4 pcs.
U0041 P2101 A009 U0066 A195
U011 A035 U0014
A032 U0064
x 5 pcs. U0015
A131 U0016
P103
A017 A001
F2000
3 F2001 A027
A011
U0052 A247 A021
A179
A129 x 4 pcs. x 2 pcs. A183
A193 A025
A129 A143 x 2 pcs. A183
x 2 pcs.
T901 A144 A019
U0040
A023 A013
A127 A119 x 2 pcs.
A191 x 3 pcs. P640
A015
U0030 A117 x 4 pcs.
x 3 pcs.
A127
4
U0032 A133
A125 A113 Refer to
F901E F901 A183 in
EXPLODED VIEWS-2
A141
A081
P9008 U0031 A095
U0034 A135 x 4 pcs.
5 A101
x 4 pcs.
A185 A123
x 5 pcs. U0063 A097
A395 x 4 pcs.
A121 A397
x 9 pcs.
HT-RC270
EXPLODED VIEWS-2
P7501
A317
x 2 pcs.
A317 U0065
A321 x 18 pcs.
A327
A323 P3101
U0060
A307
A301
A305
U0062
A325 U0055
x 3 pcs. A702 A313
A317
x 5 pcs.
U0061 A351
A303
A317 A315
x 2 pcs.
A373
U0067
A371
U0080
A309
A393 A355
x 5 pcs. A353
HT-RC270
A391
x 3 pcs.
HT-RC270
EXPLODED VIEWS-3
Q6050A
A007
x 14 pcs.
Q6056
Q6066
Q6054
Q6064
Q6051
Q6061
Q6052
Q6062
Q6050
Q6060
Q6053
Q6063 Q6050B
Q6055
Q6065
HT-RC270
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
PACK
UNIVERSAL
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
70 R inverted down mix
2
SLC
priority terminal
12 LEFT
R 41
41
FL 1
SBR/Z2R/Bi_R/RH
8
+29dB SUR. BACK
L 73 L 40 FR
7
FR
SPRLSB
/ Bi Amp
GAME IN inverted down mix RIGHT
94 FR(MIX)
72 R
R -6dB
Z2L SBRC 6
1
35 FR(DAC)
SUB2L 2
75 L L 32 LW/LH/Z3
L Z2L 97 SBL
+29dB
Front Wide/Z2
2 SBL/Z2L/Bi_L/LH
CBL/SAT IN Z2 LEFT
74 R R 33 SBL/LH/LW(DAC) 44