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HT-R320
Ref. No. 3819
082004
SERVICE MANUAL
AV RECEIVER
MODEL HT-R320
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-R320
SPECIFICATIONS
Amplifier Section
Power Output:
Front L/R: 100 W + 100 W
Center 100 W
Surround L/R 100 W + 100 W
(8 , 20 Hz~20 kHz, FTC)
Dynamic Power: 230 W + 230 W (3 , Front)
170 W + 170 W (4 , Front)
115 W + 115 W (8 , Front)
THD(Total Harmonic Distortion): 0.08 % (Power Rated)
Damping Factor: 60 (Front, 1 kHz, 8 )
Input Sensitivity and Impedance: 200 mV/ 47 k (LINE)
Output Level and Impedance: 200 mV/ 2.2 k (REC OUT)
Frequency Response: 10 Hz~100 kHz / +0 dB -3 dB (Direct mode)
Tone Control: +12 dB, -12 dB, 50 Hz (BASS)
+12 dB, -12 dB, 20 kHz (TREBLE)
SN Ratio: 100 dB (CD, IHF-A)
Speaker Impedance: 8 ~ 16
Video Section
Input Sensitivity
/Output Level and Impedance: 1 Vp-p /75 (Composite)
Tuner Section
FM
Tuning Frequency Range: 87.5 MHz~108.0 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 % (1 kHz)
Mono 0.2 % (1 kHz)
Stereo Separation: 45 dB ( 1 kHz )
AM
Tuning Frequency Range: 530 kHz~1710 kHz
Usable Sensitivity: 30 µV
S/N Ratio: 40 dB
THD: 0.70 %
General
Power Supply: AC 120 V, 60 Hz
Power Consumption: 4.7 A
Stand-by Power Consumption: 1.6 W
Dimensions (W H D): 17-1/8 5-7/8 14-3/4 inches
435 150 374 mm
Weight: 8.8 kg (19.4 lbs )
Video Inputs
A/V Input: DVD, VIDEO 1, VIDEO 2, VIDEO 3
Video Outputs
A/V Output: MONITOR OUT, VIDEO 1
Audio Inputs
Digital Inputs: 1 (Optical), 1 (Coaxial)
Analog Inputs: DVD, MULTICHANNEL, CD, TAPE,
VIDEO 1, VIDEO 2, VIDEO 3
Multichannel Inputs: 5.1
Audio Outputs
Analog Outputs: TAPE, VIDEO 1
Subwoofer Pre Outputs: 1
Speaker Outputs: 5+2
Phones: 1
Specifications and features are subject to change without notice.
HT-R320
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-R320
OPERATION CHECK-1
DC VOLTAGE DETECTION PROTECTORS
[NOTE1]
Limit time to apply voltage is 0.5 to 1.0 seconds each channel.
When protection operation does not occur at once, try several times.
[NOTE2]
Don't connect speakers or any load.
Don't short speaker terminals.
1. Set the unit to test mode " Test-1-00 " .
1-1. Press and the hold down the CD button , then press the STANDBY/ON button when the unit is Power ON.
FL display
Test - _
1-2. Press the DVD button, while the " Test - _ " is shown.
Unit will be in the state of " Test-1-00 ".
Test - 1 -00
2. Apply DC voltage (+1.5 to +3V) to MULTI CHANNEL (FL, FR, SL, SR, C) terminal, each channel.
3. Check that " Protect " is shown.
4. Apply DC voltage (-1.5 to -3V) to MULTI CHANNEL (FL, FR, SL, SR, C) terminal, each channel.
5. Check that " Protect " is shown.
6. Press the STANDBY/ON button.
0.5 sec. Disappears
Cle a r
CURRENT DETECTION PROTECTORS
[NOTE]
In the state of test mode" Test-4-29 ", the pulse waveform output for checking from speaker terminal automatically.
Therefore, oscillator is unnecessary.
1. Set the unit to test mode " Test-4-29 "
1-1. Press and the hold down the CD button , then press the STANDBY/ON button when the unit is Power ON.
FL display
Test - _
1-2. Press the VIDEO 3 button, while the" Test - _ " is shown.
Unit will be in the state of " Test-4-00 ".
Test - 4 -00
1-3. Repeat and press SPEAKERS B button to the " Test-4-29 " is shown.
Test - 4 -29
2. Connect the lord resister (3 ohms) to the speaker terminals.
3. Check that the" Protect " is not shown, and speaker relays not turn OFF.
4. Check the each speaker terminals.
5. Connect the lord resister (1.5 ohms) to the speaker terminals.
6. Check that the " Protect " is shown, and speaker relays turn OFF immediately.
7. Check the each speaker terminals.
8. Press the STANDBY/ON button.
Disappears
Cle a r
HT-R320
OPERATION CHECK-2
OUTPUT LEVEL & THERMAL DETECTION
Regarding the power supply system of this unit.
1. High-voltage mode
Usually, the power supply supplies high voltage to the power amplifier circuit when the relay (RL6901) is turned On.
2. Low-voltage mode
When as follows, a power supply changes to the state of supplying low voltage when the relay (RL6901) in turned Off.
(1) Excessive output signal is continuously outputted from power amplifier.
(2) Temperature of a heat sink over 80 degrees.
1. The loss which power amplifier generates is decreased. As a result, the miniaturization of a heat sink is realized.
2. Corresponds to a safety standard.
RL6901 High SEC1 PRI.
+B1
D6904 Low
SPEAKER
OUT HIGH D6903
F6901
POWER AMP. VOLTAGE +/- 63.0 V
MODE
Low
LOW F6902
VOLTAGE +/- 29.0 V High
OUTPUT MODE
LEVEL RL6902
DETECTION -B1 T901 MAIN
THERMAL TRANSFORMER
SENSOR
R6380 THERMAL
DETECTION VOLH/
THPRO Q7008 SEC1H
Q6303 2 MAIN 23 Q6303
MICROPROCESSOR
May not notice the fuse (F6901, F6902) broken in the case of repair.
Because the power supply is continuing supplying voltage from the High side of SEC1 at high-voltage mode.
When a power supply circuit changes to low voltage mode, amplifier does not operate.
Therefore, it is very important to check operation of this power supply system containing a fuse.
[NOTE]
Don't connect speakers or any load.
Don't short speaker terminals.
(1) Set the unit is Multi channel input state.
(2) Set the master volume into the minimum.
(3) Apply sine wave signal to MULTI CHANNEL INPUT (FL+FR+C+SL) terminals.
(4) Connect an oscilloscope to speaker terminal of FL channel.
(5) Adjust master volume so that a speaker output may become distortion about 5%.
High-voltage
(6) Check that the RL6901 and RL6902 are turned Off after about 5 seconds progress.
And the power supply changes to low-voltage mode.
Low-voltage
(7) Adjust the master volume so that output voltage may become half.
(8) Check that the RL6901 and RL6902 are turned On after 2 to 3 minutes.
And the power supply returns to high-voltage mode.
HT-R320
OPERATION CHECK-3
OUTPUT LEVEL & THERMAL DETECTION
The following is the procedure of checking detection operation of a microprocessor in false, by using test mode.
OUTPUT LEVEL DETECTION
1. Set the unit to test mode " Test-3-2 "
1-1. Press and the hold down the CD button , then press the STANDBY/ON button when the unit is Power On.
Test - _
1-2. Press the VIDEO 2 button, while the" Test - _ " is shown.
Unit will be in the state of " Test-3-00 ".
Test - 3 -00
1-3. Repeat and press SPEAKERS B to while the " Test-3-2 " is shown.
Test - 3 -02
2. Apply signal (sine wave 1kHz, -1.5dBV) to MULTI CHANNEL (FL, FR, SL, SR, C) terminal, each channel.
3. Check that FM STEREO indicator is shown.
FM STEREO FM STEREO
Test - 3-02
4. Press the STANDBY/ON button. Disappears
0.5 sec.
Cle a r
THERMAL DETECTION
1. Set the unit to test mode " Test-3-2 "
Refer to the clause of "Output level detection".
2. Connect the resistor (2.7 kohms, 1W) between " HT1 " and " COM " terminals of P6301.
TH1
2.7 kohms
P6301
1W
30
COM
TH1
COM
TH2
P6301
Front side
U16
NAAF-8245
POWER AMPLIFIER PC BOARD
3. Check that FM STEREO indicator is shown.
FM STEREO FM STEREO
Test - 3-02
4. Press the STANDBY/ON button.
0.5 sec. Disappears
Clear
HT-R320
OPERATION CHECK-4
DSP DEBUG MODE
TIn this test mode, the check with normal communication of a microprocessor and the data of DSP and DIR is possible.
This information is a help to find the cause of failure.
1. Press and hold down the DISPLAY button, then press the STANDBY/ON button when the unit is power ON.
FL display
V e rsion 0 4 2 1 2 a
2. Press the DISPLAY button, while the" Version 04212a " is shown.
1 sec.
DS P Debug Mo d e E1A---0 -o 23 o
Press STANDBY/ON button.
Details of FL display
1 2 3 4 5 6 7 8 9
DIR MEMORY/DOWNLOAD DSP
1 UNLOCK 6 MEMORY Address 8 DSP Detect Format
E = UNLOCK 0 = AC3+PLII [IEC61937]
= LOCK 1 = AC3/PCM+T-D 00 = Null
2 = DTS/DTS-ES 01= Dolby Digital
2 Digital Selector 3 = DTS 03 = Pause
D = DIGITAL 5 = AAC+PL"6" : COS 04 = MPEG1 L1
A = ANALOG 7 = FACTORY TEST MODE 05 = MPEG1 L23/MPEG2 w/o
1 = COAX 06 = MPEG2 w/o
2 = OPT1 7 ROM/RAM Select/Download Status 07 = MPEG2 AAC
3 = OPT2 H = RAM (Complete Auto Boot) 0B = DTS1
4 = Others L = ROM (Under Auto boot) 0C = DTS2
0D = DTS3
3 Sampling Frequency
1B = MPEG2 AAC1
96 = 96kHz
1C = MPEG2 AAC2
48 = 48kHz
44 = 44kHz
[Except IEC61937]
32 = 32kHz
20 = Silent
= Not detect
21 = DTS LD
4 Pre Emphasis 22 = DTS CD
K = OFF 23 = PCM
e = ON
9 DSP Decode
5 DIR Status 0 = Decode OK
0 = PCM/ANALOG X = Decode NG
2 = DTS CD - = Analog in
5 = DD/DTS/AAC
HT-R320
EXPLODED VIEWS-1 A051
x6
A050
P901 U27 P101
A024 U08
A404
x 24 A035 U09 U25
A401
A028
U23
A020
U26 U01 x6 A425
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-R320
P800 A017 x8
x8
A017 A016 A057 A421
x2 x2 x4 x3
HT-R320
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-R320
HT-R320
A B C D
SCHEMATIC DIAGRAMS-1 Q321 78L07
PRE-AMPLIFIER SECTION +7V
O G I
10/16
C359
C366
104Z
P301
R300 CDR Q6402
P261A
NC
C301 C300
R323 R322
330 78M12 R6402
NC
101 Q322 79L07 10 1/2W
CD
R345 R346
+12VAF
NC
O G I
-7V O G I C6404 C6403
NC
R301 101 10/16 223Z
C362
C367
10/16
CDL
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
101J 101J
C308
NC
Q6406 78M05 R6410
80
79
78
77
74
73
72
71
70
69
68
67
66
65
TAPE IN 103Z
C335 +5VDSP
O G I
2.2 1/2W
332J
47k
47k
47k
47k
NC
R305 CDR 1 64 C6412 C6411
TIL
TREBLE
CDL 47k C336 332J 10/16 223Z
C322 330 2 63
TIR 47k C337 NC
104Z R306 V3IR 3 62 R363
TIL 47k 10K
R329 R328
C307 C306
330 4 61 C338
101J 101J
NC
V3IR 47k C339 NC 563J
Q301 BD3811K1
5 60 R364
BASS
47k
VIDEO-3 IN V3IL 6
47k
59 C340 10K
NC
R307 V2IR C341 NC 563J
V3IL 7 58
C323 V2IL 47k C342 NC
330 8 57 R365 NC OUT_L
V1IR 47k
56 C343 NC
P302
104Z 9
47k
BASS BOOST
V1IL 10 55 R366 NC OUT_R
DVDR 47k
11 54 C344 NC
DVDL 47k C347
12 53 C345 C353 R330
VCC
MRS 47k NC 100/16+7V OUT_L
P304
13 52
MLS 47k 47/16 470
C371
14 51
472J
VEE
MSW 47k NC -7V
R310 V2IR 15 50 R371
MC 47k C346 C348 NC
R333 R332
C311 C310
330 16 49
101J 101J
NC
ADCL 47k MUT SELMUT100/16 R372