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HT-R8230
Ref. No. 3817
082004
SERVICE MANUAL
AV RECEIVER
MODEL HT-R8230
RC-479S
Silver model
SMDD 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-R8230
SERVICE PROCEDURES
1. Replacing the fuses 5. Memory Preservation
This unit does not require memory preservation batteries.
This symbol located near the fuse indicates that the
A built-in memory power backup system preserves the contents of
fuse used is show operating type, For continued protection against
memory during power failures and even when the power cord is unplugged.
fire hazard, replace with same type fuse, For fuse rating, refer to
The power cord must be plugged in order to charge the backup system.
the marking adjacent to the symbol.
The memory preservation period after the unit has been turned off varies
Ce symbole indique que le fusible utilise est e lent. depending on climate and placement of the unit. On average, memory
Pour une protection permanente, n'utiliser que des fusibles de meme contents are protected over a period of a few weeks after the time the unit
type. Ce demier est indique la qu le present symbol est apposre. has been turned off.
This period is shorter when the unit is exposed to a very humid climate.
REF. NO. DESCRIPTION PART NO. REMARKS
F6901 8A-UL 252198 !
F6901 or 8A-T/UL-ST2 252261 !
F6902 8A-UL 252198 !
F6902 or 8A-T/UL-ST2 252261 !
F901 8A-UL 252198 !
F901 or 8A-T/UL-ST2 252261 !
F903 5A-UL/T-237 252164 !
F903 or 5A-T/UL-ST2 252258 !
2. 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 terminal GND on the back panel.
Specifications: More than 10Mohm at 500V
3. 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 sauce 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 the hold down the VIDEO 1 button , then press the
STANDBY/ON button when the unit is Power ON.
2. After " Clea r " is displayed, the preset memory and each mode
stored in the memory, are initialized and will return to the
factory settings.
4. How to check version of microprocessor?
Main microprocessor Q7008.
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.
Version 04212a
2. Press the STANDBY/ON button to Power Off.
HT-R8230
EXPLODED VIEWS-1 A051
x6
A050
P901 U27 P101
A024 U08
A404
x 24 A035 U09 U25
A401
A028
U23
A020
U26 U01 x6
A022
U12
A030
Refer to
in
EXPLODED A036 P7502
F6901 VIEWS-2 x 2 U10
A021 P7503
F6902
x2 U02
U19 F903 A005 Refer to
F901 x 10 in
A025 EXPLODED VIEWS-2
A023 A007
x4 A021 x3 A410
U17 A021
U18 U20 A414
A026 A412 A060
A411 A413
U11 U03
T901
A004
A010
A065
A055 U04
A015 x4
A002 A420 A435
A056 x2
HT-R8230
P800 A017 x8
x8
A017 A016 A057 A421
x2 x2 x4 x3
HT-R8230
EXPLODED VIEWS-2
FRONT PANEL INSIDE VIEW
A418 A415
Q6050A A416 (L=215mm) (L=135mm)
x10 (L=85mm)
A037
x10
Q6050
Q6060
Q6051
Q6061
Q6052
Q6064
Q6062
Q6053 Q6054
Q6063
A416
A417
(L=85mm)
(L=160mm)
HT-R8230
HT-R8230
A B C D
BLOCK DIAGRAM
78
TUNER UNIT MAIN MICROPROCESSOR
77
1 L 2 INPUT GAIN
CD 69
0/6dB
R 1
L 72 INPUT GAIN
TAPE OUT
R 71 0/6dB 66
L 4
INPUT GAIN
TAPE IN
R 3 43
0/6dB
Q301 BD3811K
L 6
SELECTOR/TONE CONTROL
VIDEO 3 /VOLUME INPUT GAIN
R 5
0/6dB 40
L 8
VIDEO 2 IN
2 R 7 INPUT GAIN
0/6dB 30
L 76
VIDEO 1 OUT
R 75 INPUT GAIN
10 0/6dB 33
INPUT ATT.
L
-6dB
VIDEO 1 IN
R 9
18
23
21
26
25
28
27
24
22
L 12 NC
FRONT
R 11
20
14 NC
L
SURROUND
DVD R 13 Q302(1/2) POWER SUPPLY
16 +7V Q321
3 CENTER
L
Q804
10.5dB
78L07
15 50KLPF -7V
SUB WOOFER Q322
17
19
Q302(2/2)
79L07
R
2CH A/D Q801 50KLPF +2.5V
96/24 AK4586 Q7004
DSP +3.3V BA33C25
Q803
COAXIAL SL
50KLPF
DIGITAL IN Q701
DIR
CS493264 96/24
6CH D/A SR
OPTICAL
OSC DSP 50KLPF
Q281
RST.CS.INTREQ/CL/DA
74HCU04 12.288MHZ Q802
C
50KLPF
RST.CS/CL/DA/
CDTO/INT1.2.
SW
50KLPF
/SCDO
4
CTLA/B
VIDEO
VMUT2
VMUT1
VIDEO3 IN
Q203 12.5MHZ
LA7956
MUTE VIDEO
VIDEO2 IN
Q202
MONITOR OUT MAIN
VIDEO1 IN MICROPROCESSOR
Q201
VIDEO 1 OUT Q7008
DVD IN
MPD784225GC-249-8BT
VIDEO SELECTOR
BACK
UP
5MHZ
U7501
RI RI Q7501 16B
REMOTE SENSOR SUB
INTERFACE FL TUB
MICROPROCESSOR
Q7502
MPD780232GC-030-8BT
5 OPERATION
STANDBY
D7507
HT-R8230
E F G H
POWER
0,,-103dB MASTER VOLUME
BASS AMPLIFIER
69 68 OUTPUT GAIN BASS/TREBLE PHONES
BOOST
55 MUTING
0-18dB +27dB
Q307
RL6600
66 65 OUTPUT GAIN BASS/TREBLE L
FRONT
MUTING
0-18dB 57 +27dB R SPEAKERS-A
Q308 CENTER
SPEAKER
43 42 OUTPUT GAIN
RL6604
0-18dB 38 +27dB L
SURROUND
R SPEAKERS
40 39 OUTPUT GAIN L
FRONT
0-18dB 37 +27dB R SPEAKERS-B
RL6601
30 31 OUTPUT GAIN
RL6603
0-18dB 35 +27dB
33 34 OUTPUT GAIN
15dB
0-18dB 36 MUTING SWPO SUBWOOFER
Q305
Q312 Q313 PREOUT
Q306 DC VOLTAGE
DETECTION
OVER CURRENT D6704
DETECTION
Q6701~6703
PPLY
VOLTAGE
+12VAF LEVEL SENSOR
-12VAF
R6380
THERMAL
SENSOR D6703
+5V
5
HPDET
VOLH
SPCS
SELMUT
PRO
SPB
SPF
SELDA
AMUT
SELCL
POWER
SEC1H
SEC1H/L
SUB
CONTROL
TRANSFORMER
T902
D921
+5.6V -924
Q6931
MICROPROCESSOR NJM78M56A
RL6901 F901 RL901
-VP
SUB MICROPROCESSOR Q9501
+B1H +B1L SEC1
+B1 P902
+12V Q6405
VIDEO SECTION POWER D6903 AC OUTLET
78M12 D6904 AC IN
AMP.
-B1 120V 60Hz
RL6902 PRI.
-12VAF Q6402
RELAY SEC2
PREAMPLIFIER 78M12
+B2
SECTION -12VAF Q6403
79M12 D9502
-9504
16BT123GK SEC3
D9509
TUBE +5VDSP Q4606 -9512
DSP SECTION
78M05
ATION KEY FLAC
FL TUBE
FLAC
T901
MAIN
TRANSFORMER
HT-R8230
A B C D
SCHEMATIC DIAGRAMS-1 Q321 78L07
PREAMPLIFIER SECTION +7V
O G I
10/16
C359
C366
104Z
P301
R300 CDR Q6402
P261A
NC
C301 C300
R323 R322
330 78M12 R6402
NC
Q322 79L07 10 1/2W
CD
R345 R346
+12VAF
NC
O G I
-7V O G I C6404 C6403
NC
R301 CDL 10/16 223Z
C362
C367
10/16
104Z
NC
330 Q6403 79M12 R6403
R302 33 1/2W
1 TOR -12VAF
O G I
R325 R324
C303 C302
330
101J 101J
TUL C6406 C6405
NC
10/16 223Z
TAPE OUT TUR
NC
R303 C329 C330 Q6405 78M12 R6407
TOL 10/16 10/16 3.3 1W
+12VVD O G I
330
TOR
TOL
TUR
V4R
TUL
V4L
75 V1OR
C6410
76 V1OL
R304 TIR C6409 R6408 NC
10/16 223Z
C305 C304
R327 R326
330
C308
NC
Q6406 78M05
80
79
78
77
74
73
72
71
70
69
68
67
66
65
R6410
TAPE IN 103Z
C335 +5VDSP
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