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.
RC-571M
SPECIFICATIONS
HT-R820THX
Amplifier Section
Power output:
All channels:
Dynamic power:
THD (total harmonic
distortion):
Damping factor:
Input sensitivity and
impedance:
Output level and impedance:
Frequency response:
Tone control:
S/N ratio (Direct mode):
Speaker impedance:
Video Section
Input sensitivity, output
level and impedance:
Component video
frequency response:
Tuner Section
FM
Tuning frequency range:
Usable sensitivity:
S/N ratio:
THD:
FM stereo separation:
130 W (8 , 20 Hz-20 kHz, FTC)
2 x 260 W (3 , front)
2 x 200 W (4 , front)
2 x 150 W (8 , front)
-3 dB (Direct mode)
±12 dB, 50 Hz (BASS)
±12 dB, 20,000 Hz (TREBLE)
100 dB (CD, IHF-A)
8 ~
1.0 Vp-p/75
(component and S-Video Y)
0.7 Vp-p/75
(component PB/CB, PR/CR)
0.28 Vp-p/75 (S-Video C)
1.0 Vp-p/75 (composite)
5 Hz-50 MHz
87.5-107.9 MHz
FM STEREO 17.2 dBf, 2.0 µV (75 IHF)
FM MONO 11.2 dBf, 1.0 µV (75 IHF)
FM STEREO 70 dB (IHF-A)
FM MONO 76 dB (IHF-A)
FM STEREO 0.3% (1 kHz)
FM MONO 0.2% (1 kHz)
45 dB at 1 kHz
General
Power supply:
Power consumption:
Standby power consumption:
Dimensions
(W x H x D):
Weight:
Video Inputs
Component video inputs:
S-Video inputs:
Video inputs:
Video Outputs
Component video outputs:
S-Video outputs:
Video outputs:
Audio Inputs
Digital inputs:
Analog inputs:
Multichannel analog inputs:
Audio Outputs
Analog outputs:
Subwoofer pre out:
Speaker outputs:
Phones:
Specifications and features are subject to change without notice.
AC 120 V, 60 Hz
6.6 A
2.5 W
17-1/8" x 5-7/8" x 14-13/16"
(435 x 150 x 376 mm)
22.5 lbs. (10.2 kg)
2 (DVD, Video 1/2/3)
4 (DVD, Video 1-3)
4 (DVD, Video 1-3)
4 (Optical 1-3, Coaxial)
6 (CD, Tape, DVD, Video 1-3)
5.1 ch (Front L/R, Center, S
urround L/R, Subwoofer)
2 (Tape Out, Video 1 Out)
1
6+2
1
AM
Tuning frequency range:
Usable sensitivity:
S/N ratio:
THD:
530-1710 kHz
30 µV
40 dB
0.7%
SERVICE PROCEDURES
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 NO. DESCRIPTION
F6901, F6902
F6901, F6902
F6901 or, F6902 or
F901
F901 or
F903
F903 or
2. Safety-check out
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
The HT-R820THX 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 HT-R820THX
must be plugged into an AC outlet in order to charge the
backup system.
Once it has been charged, the HT-R820THX will retain
the settings for several weeks, although this depends on
the environment and will be shorter in humid climates.
6. Changing the AM band step
1. Necessary to change as follows.
R7003 Change to 10 kohms. Refer to <Fig-1>
R7004 Change to 10 kohms. Refer to <Fig-1>
2. To select.
Press and hold down the TUNER button , then press the
MEMORY button.
<Fig-1>
NADG-8230 (Pre-amplifier PC board)
Component side
25138230B
NCDG-8230
HT-R820THX
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 "Clear" is displayed, the preset memory and each mode
stored in the memory, are initialized and will return to the
factory settings.
4. To check version of microprocessor
<Note>
Main microprocessor Q7008 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.>
2. Press the STANDBY/ON button to Power Off.
Ver. 075 (04809a)
Q7008
Main microprocessor
R7003
GND
R7004
P7701
232RXD
232TXD
NC
FVCC
OPERATION CHECK-1
DC VOLTAGE DETECTION PROTECTORS
<Note1>
In test mode " Test 4-20 " to " Test 4-31 ", DC voltage is outputted from DSP IC a pre-amplifier section, and it is inputted into a
power amplifier circuit.
Therefore an external input is unnecessary in check.
<Note2>
Don't connect speakers or any load.
Don't short speaker terminals.
1. Set the unit to test mode " Test-4-00 " .
1-1. Press and the hold down the CD button , then press the STANDBY/ON button when the unit is Power On.
HT-R820THX
1-2. Press the VIDEO 3 button, while the " Test - _ " is shown.
Unit will be in the state of " Test-4-00 ".
Test - _
blinks
Test - 4-00
2. Repeat and press SPEAKERS B to the " Test-4-20 " is shown.
Test - 4-20
3. Check that the " Protect OK " is shown and speaker relays are turn Off.
Protect OK
If a circuit is failure, the " Protect NG " is shown.
Protect NG
4. Check about the " Test 4-21 " to " Test 4-31 " one by one.
Refer to <Fig-1> about the operation method.
5. Press the STANDBY/ON to power Off. (Exit the test mode.)
<Fig-1>
Operation method
Press on " SPEAKER B " button ---> Next step
Press on " SPEAKER A " button ---> Retarn
In test mode " Test 4-32 ", the pulse waveform is outputted from DSP IC on the pre-amplifier section, and it is inputted into
a power amplifier circuit. Refer to <Fig-1>.
Therefore an external input is unnecessary in check.
<Note2>
Don't connect speakers or any load.
Don't short speaker terminals.
Don't check two or more channels simultaneously.
1. Set the unit to test mode " Test-4-00 " .
1-1. Press and the hold down the CD button , then press the STANDBY/ON button when the unit is Power On.
HT-R820THX
1-2. Press the VIDEO 3 button, while the " Test - _ " is shown.
Unit will be in the state of " Test-4-00 ".
Test - _
blinks
Test - 4-00
2. Repeat and press SPEAKERS B to the " Test-4-32 " is shown.
Test - 4-32
3. Connect the road resistor 3 ohms to the speaker terminal.
4. Check that the " Protect " is not shown.
5. Connect the road resistor 1.5 ohms to the speaker terminal.
6. Check that the " Protect " is shown, and speaker relays are turn off.
Protect
7. Check about the FL, FR, C, SL, SR and SB channel one by one.
8. Press the STANDBY/ON to power Off. (Exit the test mode)
<Fig-1>
The output waveform from DSP IC in the test mode 4-32.
Details of TEST MODE 4-32
TEST MODE
4-32
DSP
output ch.
ALL
DSP
output voltage
Max.
2 ms
MASTER VOLUME = 54
2 ms
20 ms
OPERATION CHECK-3
OUTPUT LEVEL & THERMAL DETECTION
<Regarding the power supply system of this unit>
Function
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) is turned Off.
(1) Excessive output signal is continuously outputted from power amplifier.
(2) Temperature of a heat sink over 80 degrees.
Purpose
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.
HT-R820THX
Block diagram
POWER AMP.
THERMAL
SENSOR
R6380
Q6303
THERMAL
DETECTION
OUTPUT
LEVEL
DETECTION
SPEAKER
OUT
+B1
-B1
VOLH
2
HIGH
---> +/- 68.0 V
MODE
LOW
---> +/- 33.5 V
MODE
Q7008
MAIN
MICROPROCESSOR
RL6901
D6903
RL6902
SEC1H
23
D6904
Q6901
F6901
F6902
High
Low
Low
High
Necessity of operation check
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.
<Procedure>
<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 the wave form of speaker output may become distortion about 5%.
SEC1
T901
MAIN TRANS.
PRI.
High-voltage
(6) Check that the RL6901 is turned off after about 5 seconds.
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 is turned On after 2 to 3 minutes.
And the power supply returns to high-voltage mode.
OPERATION CHECK-4
OUTPUT LEVEL & THERMAL DETECTION
<Operation check of microprocessor by test mode>
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-3-3 "
1-1. Press and the hold down the CD button , then press the STANDBY/ON button when the unit is Power On.
HT-R820THX
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 button to the " Test-3-3 " is shown.
Test - 3-03
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 - 3-03
4. Press the STANDBY/ON button to power Off. (Exit from the test mode.)
Thermal detection
1. Set the unit to test mode " Test-3-3 "
Refer to the clause of " Output level detection ".
2. Connect the resistor 1.8kohms /1W between " HT2 " and " COM " terminals of P6301.
P6301
1.8 kohms
1W
TH1
TH2
COM
TH1
COM
TH2
P6301
U16
NAAF-8245
POWER AMPLIFIER PC BOARD
3. Check that FM STEREO indicator is shown.
MEMORY
MEMORY
Test - 3-03
4. Press the STANDBY/ON button to power Off. (Exit the test mode.)
Front side
OPERATION CHECK-5
DSP DEBUG MODE
<Regarding the DSP debug mode>
TIn this test mode, the check with normal communication of a microcomputer and the data of DSP and DIR is possible.
This information is a help to find the cause of failure.
How to go in DSP debug mode?
1. Press and hold down the DISPLAY button, then press the STANDBY button when the unit is power On.
HT-R820THX
<Ex.>
Ver. 075 (04809a)
2. Press the DISPLAY button, while the "Version 02415A" is shown.
DSP Debug Mode
How to Exit
Press STANDBY/ON button to power Off.
<Explanation of each parameter>
Details of display
1425697103
DIRMEMORY/DOWNLOAD
AUTOBOOT DSP AB CODE
1
UNLOCK
E = UNLOCK
= LOCK
Digital Selecter
2
D = DIGITAL
A = ANALOG
1 = COAX
2 = OPT1
3 = OPT2
4 = Others
THE COMPONENTS IDENTIFIED BY MARK ARE CRITICAL FOR SAFETY
REPLACE ONLY WITH PART NUMBER SPECIFIED
VOLTAGE (MEASURED WITH VOLTMETER) IS DC VOLTAGE.(NO INPUT SIGNAL)
ALL PNP TRANSISTORS ARE EQUIVALENT TO 2SA1015-GR UNLESS OTHERWISE NOTED.
ALL NPN TRANSISTORS ARE EQUIVALENT TO 2SC1815-GR UNLESS OTHERWISE NOTED.
ALL DIODES ARE EQUIVALENT TO 1SS133 UNLESS OTHERWISE NOTED.
ELECTROLYTIC CAPACITORS ( ) ARE IN u F/WV.
ALL CAPACITORS ARE IN pF/50WV UNLESS OTHERWISE NOTED.
EX) 030- 3pF 330- 33pF 331- 330pF 333- 0.033uF
ALL RESISTORS ARE IN OHMS 1/4WATTS UNLESS OTHERWISE NOTED.
THE THICK LINES ON PC BOARD ARE THE PRINTING SIDE OF THE PARTS.
EX) PRINTING SIDE
CIRCUIT IS SUBJECT TO CHANGE FOR IMPROVEMENT.
IS DC VOLTAGE, AT NO INPUT SIGNAL.
THE COMPONENTS IDENTIFIED BY MARK ARE CRITICAL FOR SAFETY
REPLACE ONLY WITH PART NUMBER SPECIFIED
VOLTAGE (MEASURED WITH VOLTMETER) IS DC VOLTAGE.(NO INPUT SIGNAL)
ALL PNP TRANSISTORS ARE EQUIVALENT TO 2SA1015-GR UNLESS OTHERWISE NOTED.
ALL NPN TRANSISTORS ARE EQUIVALENT TO 2SC1815-GR UNLESS OTHERWISE NOTED.
ALL DIODES ARE EQUIVALENT TO 1SS133 UNLESS OTHERWISE NOTED.
ELECTROLYTIC CAPACITORS ( ) ARE IN u F/WV.
ALL CAPACITORS ARE IN pF/50WV UNLESS OTHERWISE NOTED.
EX) 030- 3pF 330- 33pF 331- 330pF 333- 0.033uF
ALL RESISTORS ARE IN OHMS 1/4WATTS UNLESS OTHERWISE NOTED.
THE THICK LINES ON PC BOARD ARE THE PRINTING SIDE OF THE PARTS.
EX) PRINTING SIDE
CIRCUIT IS SUBJECT TO CHANGE FOR IMPROVEMENT.
IS DC VOLTAGE, AT NO INPUT SIGNAL.
SR
R5094
100K
3
R5004
C5014
22/16
1K
C5004
101K
2.2K
R5044
D5004
MTZJ5.6B
SB
4
C5015
R5005
22/16
1K
C5005
101K
2.2K
R5045
D5005
MTZJ5.6B
R5014
56K
R5104
100K
R5015
56K
R5105
100K
-0.1V
R5024
330
R5095
82K
[100K]
-0.1V
R5025
330
-61V
C5024
10/50
Q5005
-61V
C5025
10/50
Q5004
R5064
1.2K
R5065
1.2K
R5114
1K
C5034
NC
-0.7V
R5115
1K
C5035
NC
-0.7V
R5054
4.7K
Q5054
-61.6V
R5084
470
R5055
4.7K
-61.6V
R5085
470
Q5055
Q5014
Q5015
R5074
NC
R5075
NC
C5104
10/100
C5044
100/16
C5105
10/100
C5045
220 /16
R5134
18K
C5114
10/100
R5135
18K
C5115
10/100
65.1V
C5074
NC
0V
-1V
C5094
101J
-65.1V
R5174
150
(1/4W)
65.1V
C5075
NC
0V
-1V
C5095
101J
-65.1V
150
5
P406AP407A
E
ESBECESLESRERELE
TO NADG-8230
P306A
<Notes>
NC=No mount of parts.
Refer to the following table about the parts displayed by mark " ".
REF. NO.DESCRIPTION
Q5000-5005,5010-5015KTC3200-BL OR 2SC1775A-E,F OR 2SC1845-E
Q5030-352SA949(ONK)-Y,O
Q5040-452SC2229(ONK)-Y,O
Q5050-55KTC3200-BL,GR OR 2SC1775A-E,F OR 2SC1845-E,F
E
E
E
E
E
E
E
E
TO NAAF-8245
E
E
P6011A
R5040
R
R5041
L
R5000
1K
C5000
101K
D5000
MTZJ5.6B
R5001
1K
C5001
101K
2.2K
D5001
MTZJ5.6B
2.2K
C5010
47/16
C5011
47/16
R5010
56K
R5100
100K
R5011
56K
R5101
100K
R5090
100K
-0.1V
R5020
330
R5091
100K
-0.1V
R5021
330
-61V
C5020
10/50
-61V
C5021
10/50
Q5000
Q5001
R5060
1.2K
R5061
1.2K
R5110
1K
C5030
NC
-0.7V
R5111
1K
C5031
NC
-0.7V
R5050
4.7K
-61.6V
R5080
470
R5051
4.7K
-61.6V
R5081
470
Q5050
Q5051
Q5010
Q5011
R5070
NC
R5071
NC
C5100
10/100
C5040
220/16
C5101
10/100
C5041
220/16
R5130
18K
C5110
10/100
R5131
18K
C5111
10/100
R5160
150
1.0V
C5080
040D
(1/4W)
1.0V
C5081
040D
65.7V
Q5030
C5050
47/50
R5030
56K
-65.7V
R5161
150
C5051
47/50
R5031
56K
-65.7V
(1/4W)
Q5040
(1/4W)
65.7V
Q5031
Q5041
R5140
NC
R5141
NC
65.1V
C5070
NC
0V
-1V
C5090
101J
-65.1V
R5170
150
65.1V
C5071
NC
0V
-1V
C5091
101J
-65.1V
R5171
150
(1/4W)
R5180
10
(1/4W)
R5181
10
(1/4W)
R5190
10
(1/4W)
-66.5V
R5191
10
(1/4W)
-66.5V
-B1
+B1
66.5V
NF
-B1
+B1
B+
66.5V
NF
B+
B-
P6000A
B-
P6001A
TO NAAF-8245
TO NAAF-8245
C
R5002
1K
C5002
101K
R5042
D5002
MTZJ5.6B
2.2K
C5012
22/16
R5012
56K
R5102
100K
R5092
100K
-0.1V
R5022
330
-61V
C5022
10/50
Q5002
R5062
1.2K
R5112
1K
C5032
NC
-0.7V
R5052
4.7K
-61.6V
R5082
470
Q5052
Q5012
R5072
NC
C5102
10/100
C5042
100/16
R5132
18K
C5112
10/100
R5162
(1/4W)
R5172
150
(1/4W)
1.0V
C5082
040D
150
65.7V
Q5032
C5052
47/50
R5032
56K
Q5042
-65.7V
R5142
NC
65.1V
C5072
NC
0V
-1V
C5092
101J
-65.1V
R5182
10
(1/4W)
R5192
10
(1/4W)
-66.5V
-B1
+B1
66.5V
NF
B+
B-
P6002A
TO NAAF-8245
HT-R820THXHT-R820THX
A
BCDEFGH
SCHEMATIC DIAGRAMS-4
SPEAKER TERMINAL & POWER SUPPLY SECTION
NAETC-8240
1
JL6803B
LSP
RSP
CSP
LSSP
RSSP
SBSP
TO NAAF-8245
2
JL6805B
BRLD
FRLD
TO NAAF-8245
3
CSRLD
+24V
LSPE
RSPE
CSPE
LSSPE
RSSPE
SBSPE
JL6804B
TO NAAF-8245
L6800 NC
R6800
R6810
J
L6802
R6802
R6812 NC
J
L6804
R6804
R6814
J
NC
NC
NC
NC
NC
NC
NC
U11
SPEAKER TERMINAL PC BOARD
C6800
D6800
RL6800
RL6801
D6801
C6801
RL6803
RL6804
D6804
C6804 103J
L6803
R6803
R6813 NC
J
L6805
R6805
R6815 NC
L6801
R6801
R6811 NC
J
NC
NC
NC
NC
J
NC
NC
103J
103Z
L
R
FRONT SPEAKERS-A
L
R
SURROUND
SPEAKERS
CENTER
SPEAKER
SURROUND
BACK
SPEAKER
C6842
C6845
C6840
NC
NC
C6841
FRONT
SPEAKERS-B
P6801
P6800
NC
C6846
C6847
NC
C6843
NC
NC
C6844
L
P6802
R
NC
NC
C6856
NC
C6857
NC
C6850
NC
C6851
NC
C6853
NC
C6854
NC
C6855
NC
C6852
NC
C921
C902
472M
/250VAC
CAUTION
FOR CONTINUED PROTECTION
AGAINST FIRE HAZARD, REPLACE
ONLY WITH FUSE OF SAME TYPE
VA
AND RATING INDICATED.
4
ATTENTION
AFIN D'ASSURER UNE PROTECTION
PERMANENTE CONTRE LES RISQUES
D'INCENDIE, REMPLACER UNIQUEMENT
VA
PAR UN FUSIBLE DE MEME TYPE
ET CALIBRATION COMME INDIQUE.
THIS SYMBOL LOCATED NEAR THE FUSE INDICATES
THAT THE FUSE USED IS SLOW 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 UTLISE EST
E LENT. POUR UNE PROTECTION PERMANENTE,N'UTILISER
QUE DES FUSIBLES DE MEME TYPE. CE DARNIER EST
INDIQUE LA QU LE PRESENT SYMBOL EST APPOSE.
NAAF-8245
P6907
P901
5
P917
P918
AC-H
AC-G
P901A
U19
POWER SUPPLY PC BOARD
NAPS-8248
8.2
R921
(1W)
223Z
D921
C923
223Z
D923
D921-D924
GP104003E OR
RL1N4003
T902
NPT-1492D
D922
D924
C922
100/35
C901
103M
/275VAC
F903
5A125V
R924 82
(1/2W)
D925
R926
(1W)
470
R922
R923
Q921
2SC2458-GR
2SC1740S-R,S
0.1V
RL901
F901
8A125V
P902
AC OUTLET
D:120W 1A MAX
+13VS
+13VS
MPUGND
POWER
1K
P912
P931A
P911
TO NNAF-8245
NAPS-8247
U18
TERMINAL
PC BOARD
P912A
3
7
P911A
T901
NPT-1494D
THERMAL FUSE
NOTE
THE COMPONENTS IDENTIFIED BY MARK ARE CRITICAL FOR SAFETY
REPLACE ONLY WITH PART NUMBER SPECIFIED
VOLTAGE (MEASURED WITH VOLTMETER) IS DC VOLTAGE.(NO INPUT SIGNAL)
ALL PNP TRANSISTORS ARE EQUIVALENT TO 2SA1015-GR UNLESS OTHERWISE NOTED.
ALL NPN TRANSISTORS ARE EQUIVALENT TO 2SC1815-GR UNLESS OTHERWISE NOTED.
ALL DIODES ARE EQUIVALENT TO 1SS133 UNLESS OTHERWISE NOTED.
ELECTROLYTIC CAPACITORS ( ) ARE IN u F/WV.
ALL CAPACITORS ARE IN pF/50WV UNLESS OTHERWISE NOTED.
EX) 030- 3pF 330- 33pF 331- 330pF 333- 0.033uF
ALL RESISTORS ARE IN OHMS 1/4WATTS UNLESS OTHERWISE NOTED.
THE THICK LINES ON PC BOARD ARE THE PRINTING SIDE OF THE PARTS.
EX) PRINTING SIDE
CIRCUIT IS SUBJECT TO CHANGE FOR IMPROVEMENT.
IS DC VOLTAGE, AT NO INPUT SIGNAL.
<Notes>
NC=No mount of parts.
NAETC-8239
U10
TERMINAL PC BOARD
8
R9521
(1/2W)
3.3
9
C9513
223Z
JL9501B
JL9501A
NAETC-8238
U09
REGULATOR PC BOARD
5.6V
C6933
Q6931
TA78057S OR
NJM78M56FA
D6933
R6935
120
(2W)
PROTHERM
10/16
O
G
I
17.8V
C6932
103Z
C6931
1000/25
D6932
D6932,6933:
GP104003E OR
RL1N4003
PRO
SPF
+13VS
POWER
SPCS
S3GND
TO NAAF-8245
SPB
SE1H
VOLH
MPUGND
MPUGND
+24V
AGND
HPR
HPL
P6931A
P7503B
FLAC1
FLAC2
MPUGND
HPL
AGND
HPR
+5.6V
P410A
+24V
S3
S3GND
S3
S2
S2
S2
S2
+5.6V
PROTHERM
P411A
POWER
SPF
SPCS
SE1H
SPB
VOLH
PRO
MPUGND
+13VS
TO NADIS-8231
TO NADG-8230
TO NADG-8230
10
11
12
13
14
15
16
17
18
19
P995C
BLU
P995A
TO NAAF-8245
BLK
P995B
RED
0.47
R9501
1
F9501
R9503
0.22
R9502
(1/2W)
(1/2W)
NC
(1/2W)
NAPS-8249
U20
TERMINAL
PC BOARD
JL6952B
TO NAAF-8245
HT-R820THXHT-R820THX
A
SCHEMATIC DIAGRAMS-5
POWER AMPLIFIER SECTION
NAAF-8245
1
2
SL
P6003
NF
-B1
+B1
B+
B-
TO NAAF-8235
SR
P6004
NFNF
-B1-B1
+B1+B1
B+B+
B-B-
TO NAAF-8235
R6033
820
R6003
5.6K
R6013
3.9K
R6043
1K
R6053
3.9K
R6004
5.6K
R6014
3.9K
R6044
1K
R6054
3.9K
R6034
820
BCDEFGH
POWER AMPLIFIER PC BOARD
U16
1V
0.2V
Q6013
IID. ADJ.
-0.3V
1V
0.2V
Q6014
IID. ADJ.
-0.3V
-0.3V
-66.5V
-0.3V
-66.5V
1.1V
1.1V
(1/4W)
-1.1V
R6024
2.2
-1.1V
R6023
Q6023
Q6024
2.2
R6073
150
(1/4W)
(1/4W)
0.5V
-0.5V
Q6043
0.5V
R6074
150
(1/4W)
-0.5V
Q6044
C6043
47/50
Q6034
C6044
47/50
Q6033
P6083
ID+
ID-
P6084
ID+
ID-
R6083
2.2
(1/4W)
R6093
2.2
(1/4W)
C6233
473J
R6233
8.2
R6084
2.2
(1/4W)
R6094
2.2
(1/4W)
C6234
473J
R6234
8.2
(1W)
(1W)
0.5V
-0.5V
0.5V
-0.5V
0V
R6103
0.22X2
(2W)
0V
R6104
0.22X2
(2W)
Q6053
R6143
22K
C6053
0V
Q6063
Q6054
R6144
22K
C6054
0V
Q6064
66.5V
R6173
66.5V
Q6073
2SC2631-R,S
R6153
12K
47K
D6003
Q6074
2SC2631-R,S
R6154
12K
R6174
47K
D6004
R6163
33K
R6193
330K
R6183
R6164
33K
R6194
330K
D6013
47K
D6014
R6184
47K
P6011
E
E
E
E
E
E
E
E
E
TO NAAF-8235
1V
Q6015
-0.3V
-66.5V
1.1V
R6025
2.2
(1/4W)
Q6025
-1.1V
0.5V
R6075
150
(1/4W)
-0.5V
Q6045
Q6035
C6045
47/50
P6085
ID+
ID-
R6085
2.2
(1/4W)
R6095
2.2
(1/4W)
C6235
473J
R6235
8.2
(1W)
R6005
5.6K
R6015
3.9K
R6045
1K
R6055
3.9K
R6035
820
0.2V
IID. ADJ.
-0.3V
3
SB
P6005
NFNF
-B1-B1
+B1+B1
B+B+
B-B-
TO NAAF-8235
4
D6903D6904
D10XB60H D10XB60H
C6901
12000/75
C6902
D6902
D6901
P6906
12000/75
C6903
104J
C6708
223J
D6706
D6705
NC
NC
TO NAPS-8248
5
TO NAPS-8248
P6907
P931
+13VSPRO
+13VSPOWER
MPUGNDRLGND
POWERPOWERPROTHERM
TO NAAF-8249
C6905
334J
/100
C6904
334J/100
F6901
10A125V
C6907
104J
R6905
(1/2W)
0
R6904
(1/2W)
0
C6906
104J
P995CC
BLU
C6909
C6908
P995AA
BLK
RL6902
D6906
RL6901
NC
P995BB
NC
RED
66.5V
Q6055
0.5V
R6145
0V
22K
C6055
R6105
0.22X2
(2W)
0V
-0.5V
Q6065
TO NAPS-8249
Q6075
2SC2631-R,S
R6155
12K
R6175
47K
D6005
C6920
NC
0.1V
F6902
10A125V
JL6952A
R6165
33K
R6195
330K
Q6901
D6015
R6185
47K
0.8V
R6605
8.2
J011AJ011
J010AJ010
Refer to the following table about the parts displayed by mark " ".
REF NO.DESCRIPTION
Q6010-60152SC1740S-R,S
Q6020-60252SC1740S-R,S
Q6030-6032KTD2061-Y OR 2SC5171
Q6033-6035KTD2061-Y OR 2SC5171
Q6040-6042KTB1369-Y OR 2SA1930
Q6043-6045KTB1369-Y OR 2SA1930
Q6050-60512SC5242-O,R OR MN150S-Y,P,O
(1/2W)
Q6052-60552SC5242-O,R OR MN150S-Y,P,O
Q6060-60612SA1962-O,R OR MP150S-Y,P,O
R6902
Q6062-60652SA1962-O,R OR MP150S-Y,P,O
1K
Q6601-6603,Q6901 KTC3199-GR,2SC1740S-R,S,2SC2458-GR
Q6701,6702KTC3200-BL,GR OR 2SC1775A-E,F OR 2SC1845-E,F
Q6303,6313
KTA1267-GR OR 2SA933S-R,S
L
R6030
680
R6000
5.6K
P6000
R6010
3.9K
NF
-B1
+B1
B+
B-
R6040
TO NAAF-8235
1K
R6050
3.9K
R
R6031
680
R6001
5.6K
P6001
R6011
3.9K
R6041
TO NAAF-8235
1K
R6051
3.9K
C
R6032
680
R6002
5.6K
P6002
R6012
3.9K
R6042
TO NAAF-8235
1K
R6052
3.9K
1V
0.2V
Q6010
IID. ADJ.
-0.3V
1V
0.2V
Q6011
*
IID. ADJ.
-0.3V
1V
0.2V
Q6012
IID. ADJ
-0.3V
-0.3V
-66.5V
-0.3V
-66.5V
-0.3V
-66.5V
1.1V
1.1V
1.1V
R6020
2.2
Q6020
-1.1V
R6021
2.2
-1.1V
R6022
2.2
Q6022
-1.1V
(1/4W)
Q6040
(1/4W)
Q6021
Q6041
(1/4W)
0.5V
R6070
120
(1/4W)
-0.5V
0.5V
R6071
120
(1/4W)
-0.5V
0.5V
R6072
150
(1/4W)
-0.5V
Q6042
Q6030
C6040
47/50
Q6031
C6041
47/50
Q6032
C6042
47/50
P6080
ID+
ID-
P6081
ID+
ID-
P6082
ID+
ID-
R6080
2.2
(1/4W)
R6090
2.2
(1/4W)
C6230
473J
R6230
8.2
R6081
2.2
(1/4W)
R6091
2.2
(1/4W)
C6231
R6231
8.2
R6082
2.2
(1/4W)
R6092
2.2
(1/4W)
C6232
473J
R6232
8.2
473J
(1W)
(1W)
(1W)
0.5V
-0.5V
0.5V
-0.5V
0.5V
-0.5V
Q6050
0V
R6100
0.22X2
(2W)
0V
R6101
0.22X2
(2W)
0V
R6102
0.22X2
(2W)
66.5V
R6140
22K
C6050
0V
Q6060
R6170
D6000
66.5V
Q6051
R6141
22K
C6051
0V
Q6061
R6171
D6001
66.5V
Q6052
Q6072
2SC2631-R,S
R6142
22K
C6052
0V
Q6062
R6172
D6002
R6160
33K
Q6070
2SC2631-R,S
R6150
12K
R6190
330K
47K
R6161
33K
Q6071
2SC2631-R,S
R6151
12K
R6191
330K
47K
R6162
33K
R6152
12K
R6192
330K
47K
D6010
R6180
47K
D6011
R6181
47K
D6012
R6182
47K
NOTE
THE COMPONENTS IDENTIFIED BY MARK ARE CRITICAL FOR SAFETY
REPLACE ONLY WITH PART NUMBER SPECIFIED
VOLTAGE (MEASURED WITH VOLTMETER) IS DC VOLTAGE.(NO INPUT SIGNAL)
ALL PNP TRANSISTORS ARE EQUIVALENT TO 2SA1015-GR UNLESS OTHERWISE NOTED.
ALL NPN TRANSISTORS ARE EQUIVALENT TO 2SC1815-GR UNLESS OTHERWISE NOTED.
ALL DIODES ARE EQUIVALENT TO 1SS133 UNLESS OTHERWISE NOTED.
ELECTROLYTIC CAPACITORS ( ) ARE IN u F/WV.
ALL CAPACITORS ARE IN pF/50WV UNLESS OTHERWISE NOTED.
EX) 030- 3pF 330- 33pF 331- 330pF 333- 0.033uF
ALL RESISTORS ARE IN OHMS 1/4WATTS UNLESS OTHERWISE NOTED.
THE THICK LINES ON PC BOARD ARE THE PRINTING SIDE OF THE PARTS.
EX) PRINTING SIDE
CIRCUIT IS SUBJECT TO CHANGE FOR IMPROVEMENT.
IS DC VOLTAGE, AT NO INPUT SIGNAL.
NAETC-8255
TH1
COM
TH2
THERMAL SENSOR
U26
PC BOARD
Q6313
R6318
4.7K
R6317
470
R6306
10K
D6307
D6306
R6307
470
R6981
390
(1/2W)
JL6402A
TH1
+24V
TH2
24V
JL6402B
Q6303
0V
R6308
4.7K
LSPE
RSPE
CSPE
LSSPE
RSSPE
SBSPE
LSP
RSP
CSP
LSSP
RSSP
SBSP
R6980
390
(1/2W)
JL6804A
JL6803A
R6380
PTFL04BF
471Q2N34BO
R6381
PTFL04BC
471Q2N34B0
TO NAETC-8240
TO NAETC-8240
<Notes>
NC=No moune of pares.
C6701
220/6.3
R6701
22K
0V
D6701
R6702
C6703
10K
223Z
R6708
33K
Q6701 Q6702
D6702
+B1
C6704
1/50
Q6703
KTA1268-GR,BL
OR 2SA992-E,F
0V
C6716
100/6.3
R6704
47K
D6703
MTZJ5.1B
220K
R6706
D6714
MTZJ5.1B
D6704
MTZJ5.1B
C6706
100/6.3
5.6K
R6719
R6709
5.6K
R6710
12K
24V
Q6603
Q6601
0.05V
0.8V
R66011KR6603
1K
+13VS+13VS
24V
Q6602
0V
0V
R6602
1K
R6604
8.2
(1/2W)
BRLD
FRLD
CSRLD
+24V
HPL
HPR
E
+24V
MPUGND
VOLH
SEC1H
SPB
SPCS
SPF
JL6805A
TO NAETC-8240
P6931
TO NAETC-8238
SCHEMATIC DIAGRAMS-6
VIDEO SECTION
HT-R820THXHT-R820THX
P253B
P261B
YC
P251
E301
P254
C263
104Z
C253
104Z
C261
471J
C262
471J
R251
75
R262
330
R261
330
R252
75
R253
75
NAETC-8234
VIDEO3 IN
SRLV
TO NAVD-8250TO NADG-8230
U05
P243B
P242A
Q241
2SC1740
RL241
RL242
D241
R249
1K
C242
103Z
C241
103Z
P241
COMPONENT VIDEO
Y
CB(PB)
CR(PR)
P241
VIDEO 1/2/3 IN
Y
CB(PB)
CR(PR)
P241
DVD IN
Y
CB(PB)
CR(PR)
DGND
DGND
CNPT
+5V
CR2
CB2Y2CR1
CB1
Y1
CR
CB
GND
Y
CPNT
+5V
DGND
NAVD-8236
OUT
U07
COMPONENT VIDEO
NC
P206A
TO NAVD-8250
P801B
P243A
+12V
GND
GND
CNPT
RI
A
B
VMUT2
VMUT1
OPT2
DGND
OPT1
+5V
COAX
OPTOUT
NAETC-8243
TO NADG-8230
U14
COMPONENT VIDEO TERMINAL PC BOARD
TERMINAL
PC BOARD
VIDEO 3 TERMINAL
PC BOARD
NOTE
THE COMPONENTS IDENTIFIED BY MARK ARE CRITICAL FOR SAFETY
REPLACE ONLY WITH PART NUMBER SPECIFIED
VOLTAGE (MEASURED WITH VOLTMETER) IS DC VOLTAGE.(NO INPUT SIGNAL)
ALL PNP TRANSISTORS ARE EQUIVALENT TO 2SA1015-GR UNLESS OTHERWISE NOTED.
ALL NPN TRANSISTORS ARE EQUIVALENT TO 2SC1815-GR UNLESS OTHERWISE NOTED.
ALL DIODES ARE EQUIVALENT TO 1SS133 UNLESS OTHERWISE NOTED.
ELECTROLYTIC CAPACITORS ( ) ARE IN u F/WV.
ALL CAPACITORS ARE IN pF/50WV UNLESS OTHERWISE NOTED.
EX) 030- 3pF 330- 33pF 331- 330pF 333- 0.033uF
ALL RESISTORS ARE IN OHMS 1/4WATTS UNLESS OTHERWISE NOTED.
THE THICK LINES ON PC BOARD ARE THE PRINTING SIDE OF THE PARTS.
EX) PRINTING SIDE
CIRCUIT IS SUBJECT TO CHANGE FOR IMPROVEMENT.
IS DC VOLTAGE, AT NO INPUT SIGNAL.
<Notes>
NC=No moune of pares.
A
1
2
3
4
5
BCDEFGH
P281
Y
C
P203
YC
C
Y
P202
Y
C
C
Y
P201
NAETC-8243
P206B
Q281
74HCU04
1
2
3
4
5
6
78
9
10
11
12
13
14
P282
U283
U282
U281
P203
Q204
2SA933-S
KTA1267-GR
Q209
2SA933-S
KTA1267-GR
VIDEO OUT
VCC
VIN4
VIN3
VIN2
GND
VIN1
B
A
Q203
LA7956
1
2
3
4
5
6
7
8
9
VIDEO OUT
VCC
VIN4
VIN3
VIN2
GND
VIN1
B
A
Q213LA7956
1
2
3
4
5
6
7
8
9
VIDEO OUT
VCC
VIN4
VIN3
VIN2
GND
VIN1
B
A
Q212 LA7956
1
2
3
4
5
6
7
8
9
P201
P202
Q201
RN1241
Q202
RN1241
Q208
RN1241
Q207
RN1241
Q210
RN1241
Q211
RN1241
NAETC-8234
P253A
Q205
DTA114ES
KRA102M
Q206
DTA114ES
KRA102M
L283
022M
L281
220K
NCH-1452
L282
220K
NCH-1452
D201
D202
C203
470/16
C201
2.2/50
C202
2.2/50
C204
2.2/50
C205
470/16
C221
47/16
C211
470/16
C209
2.2/50
C288
47/6.3
C285
47/6.3
C225
47/16
C223
47/16
C217
2.2/50
C218
2.2/50
C207
2.2/50
C213
2.2/50
C215
470/16
C289
223Z
C227
223Z
C220
223Z
C216
223Z
C222
223Z
C210
223Z
C208
223Z
C286
223Z
C281
223Z
C284
080D
C283
223Z
C226
223Z
C224
223Z
C219
223Z
C287
223Z
C282
101J
C206 223Z
C212
223Z
C214
223Z
R282
470
R223
100K
R230
680K
R205
75
R207
680K
R201
75
R210
220
R202
75
R208
680K
R209
680K
R203
75
R206
75
R204
100K
R228
220
R220 75
R219
75
R226
680K
R214
75
R213
75
R224
100K
R284
10K
R229
680K
R281
75
R225
680K
R212
75
R211
75
R217
100K
R218
100K
R216
75
R222
75
R221
75
R215 75
R227
680K
V4
V4Y
V4C
+12V
GND
A
B
VMUT2
VMUT1
RI
OPT2
DGND
OPT1
+5V
COAX
OPTOUT
NAVD-8250
VIDEO-2 IN
VIDEO-1
DVD IN
MONITOR
OUT
OUT
IN
OUT
IN
MONITOR
OUT
IN
VIDEO-2
VIDEO-1
DVD IN
U21
VIDEO PC BOARD
OPTICAL
1
OPTICAL
2
OPTICAL
3
COAXIAL
RI
REMOTE
CONTROL
PC BOARD CONNECTION DIAGRAM
FM
U11 NAETC-8240
SPEAKER TERMINAL PC BOARD
TUNER UNIT
AC IN
JL6805C
JL6804C
JL6803C
U26
NAETC-8255
THERMAL SENSOR
PC BOARD
AM
VIDEO
RI
U21
NAVD-8250
VIDEO PC BOARD
P253A
DVDVIDEOTAPE
DIGITAL IN
P206B
HT-R820THX
U07
NAVD-8236
COMPONENT VIDEO TERMINAL
PC BOARD
COMPONENT VIDEO
P243B
U16
NAAF-8245
POWER AMPLIFIER
PC BOARD
F6901
F6902
P931
P6907
P995CC
BLU
SUB TRANS.
P917
P918
OUTLET
P901A
P911
U19
NAPS-8248
POWER SUPPLY
PC BOARD
U18
NAPS-8247
TERMINAL
PC BOARD
P911A P913A
MAIN TRANS.
JL9501B
U10
NAETC-8239
TERMINAL PC
BOARD
JL
6952A
P995BB
RED
T902
P913
F901
F903
JL6952B
P995B
RED
JL6805A
P995AA
BLK
P931A
P995C
P995A
BLU
BLK
U20
NAPS-8249
TERMINAL PC
BOARD
JL6402A
P6000
JL6803A
JL6804A
P6011
P6001
P6073A
P6002
P6003
P6004
P6072A
P6005
P6931
P6072
U12
NAETC-8241
HOLDER PC BOARD
U03
NASW-8232
OPERATION SWITCH
PC BOARD
JL7501B
JL7502B
P7501
U04
NAETC-8233
HEADPHONE TERMINAL
PC BOARD
402B
JL6
JL7502A
Q6050
Q6060
Q6051
Q6061
Q6052
Q6062
Q6053
Q6063
Q6054
Q6064
Q6055
Q6065
JL7501A
Q800
P6000A
P407A
P6011A
P6001A
P306A
P6002A
P6003A
P6004A
P6073
P6005A
P6931A
U01
NADG-8230
PRE-AMPLIFIER
PC BOARD
U06
NAAF-8235
DRIVER AMPLIFIER
PC BOARD
U09
JL9501A
FL TUBE
NAETC-8238
REGULATOR PC BOARD
P7503B
U02
NADIS-8231
DISPLAY PC BOARD
JUMPER WIRESOCKET
FLAT CABLE
Q301
P406
P306
P101
Q701
Q7008
Q702
P7502B
P410B P411B
P411A
P410A
P7503A
U7501
BOARD TO BOARD
U14
NAETC-8243
TERMINAL
PC BOARD
P801
P206A
P801B
P261A
P7502A
S7501
P253B
U05
NAETC-8234
VIDEO 3 TERMINAL PC BOARD
P243A
P261B
PRINTED CIRCUIT BOARD VIEWS-1
O
C70C7C703
019
020
120
U01
PREAMPLIFIER PC BOARD
(NADG-8230)
Component side
A
1
2
3
4
5
BCDEFGH
HT-R820THXHT-R820THX
PRINTED CIRCUIT BOARD VIEWS-2
TUR
TUMUT
SD
STEREO
C82C82
C829
C831
C83
Q7008
Q
8
U01
PREAMPLIFIER PC BOARD (NADG-8230)
Soldering side
A
1
2
3
4
5
BCDEFGH
HT-R820THXHT-R820THX
PRINTED CIRCUIT BOARD VIEWS-3
C75
513
C7
50
L7501A
Q75
Q
Q
507
50
513
R
S7611
S7612
S
S7622
S7623
S7625
S
S763
S
X7501
VIDE
VID
R
C
R
R7519
7634
7636
S7501
S
R9
R9
R
R9
RY
TUNER
CD
TUNIN
GND
N
G
N
N
N
D
C
CNCNC
C
C
N
5.6
HP-R
HP-G
HP-L
ND
GND
FAC2
U02
DISPLAY PC BOARD
(NADIS-8231)
Component side
A
1
2
3
4
5
BCDEFGH
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