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DTA-9.4
Ref. No. 3750
SERVICE MANUAL
May, 2003
SEVEN CHANNEL AMPLIFIER MODEL DTA-9.4
Black model BUDD 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.
DTA-9.4 SPECIFICATIONS
Amplifier section
Continuous average power output (FTC Power, Rated Power) (Measured with AES-17 LPF) Front L/R: 120 Watts per channel min. RMS. Into 8 ohms 2 channel driven, from 20 to 20,000 Hz with no more than 1 % total harmonic distortion. 240 Watts per channel min. RMS. Into 4 ohms 2 channel driven, 1,000 Hz with no more than 1.5 % total harmonic distortion. Center: 120 Watts min. RMS. Into 8 ohms 1 channel driven, from 20 to 20,000 Hz with no more than 1 % total harmonic distortion. 240 Watts min. RMS. Into 4 ohms 1 channel driven, 1,000 Hz with no more than 1.5 % total harmonic distortion. Surround L/R: 120 Watts per channel min. RMS. Into 8 ohms 2 channel driven, from 20 to 20,000 Hz with no more than 1 % total harmonic distortion. 240 Watts per channel min. RMS. Into 4 ohms 2 channel driven, 1,000 Hz with no more than 1.5 % total harmonic distortion. Surround Back: 120 Watts per channel min. RMS. Into 8 ohms 2 channel driven, from 20 to 20,000 Hz with no more than 1 % total harmonic distortion. 240 Watts per channel min. RMS. Into 4 ohms 2 channel driven, 1,000 Hz with no more than 1.5 % total harmonic distortion. Dynamic Power Output 2 x 350 Watts at 2 ohms 2 x 267 Watts at 4 ohms 2 x 162 Watts at 8 ohms 1 % at rated power (1 kHz) 0.01 % at 1 watt output (1 kHz) 25 at 8 ohms 1 kHz 1 V, 5 k ohms (Unbalanced) 2 V, 10 k ohms (Balanced) 5 - 12V dc (12V Trigger) 10 Hz to 60 kHz : +1 dB, 3 dB (8 ohms) 115 dB (IHF-A, 1 V input / Unbalanced or 2 V input / Balanced)
General
Power Supply Power Consumption Power Consumption in standby mode Input terminals Analog Audio: Control: Power supply: Output terminals Analog Audio: Weight Unbalanced (RCA type) x 7 Balanced (XLR type) x 7 12V TRIGGER (CONTROL LINK) AC INLET (IEC type) Speakers x 7 39.0 lbs. AC 120 V, 60 Hz 5.3 A 3.8 W
Dimensions (W x H x D) 17-1/8" x 6-7/8" x 17-13/16"
Specifications and features are subject to change without notice.
Total Harmonic Distortion (Measured with AES-17 LPF) Damping Factor Input Sensitivity and Impedance
Frequency Response Signal to Noise Ratio
DTA-9.4 OPERATION CHECK-1
CHECK THE DC POWER SUPPLY CURRENT DETECTION
Notes
No load and No signal input.
How to check?
1. Remove the top cover. 2. Connect the power supply card to a wall outlet. 4. Power On the unit. 5. Short-circuit the both ends of P161 on NAPS-7789. An object should be in the following states.
Lights Blinks
Standby Power
CHECK THE RELAYS AND INDICATORS
How to check?
2. Connect the power supply card to a wall outlet. 4. Power On the unit. 5. Immediately after power switch On.
Check
Blinks
Standby Power
4. About 1 second after turning On a power supply.
Check
RL501 and RL502 Relays ON. 5. About 10 seconds after turning On a power supply.
Check
RL701 Relays ON. Lights
Power
Check
Standby
Blinks stop
DTA-9.4
EXPLODED VIEW
A071 A070 A049 A402 A401 A023 A050 A047
A071 A070
A044 A044 A024 A025 A041 A044 A042 A044 A043 A028 A041 A044 A025 A026 A032 A035 A037 A037 D102 D101 D103 A027 D104 Q881 Q883 Q882 A081 A076 A078 A032 Q842 A031 Q884 A028 A030 A019 A050 A018 D902 D901 A061 A060 A039 A027 A001 A005 A002 A003 A431 A426 A004 A424 A420 A047 A075 A042 A080 A078
A402 A402 A012
A041
A403 A037 F901 A045
A010 A020 A010 A018 L997
F9801 L998 A018 A008 P001
A421 A423
A013 A011
P193 Q512
A021 A014 Q511 A014 A085 A015 Q506 Q505 A007 A009 A085 A086 A087 A016 A086 A087 A006 A431 A425 A019
P651
DTA-9.4
A017
A007
A422 A427 A421
A430
DTA-9.4
A B C D
BLOCK DIAGRAMS
+3V
LPF
RCA
2
+7V
+B+(27V) RL501
Q303
1
RCA Type
2 3 10.4dB
Q302 0dB
INPUT
Hot
MOS FET Driver
(7.4dB)
70kHz LPF
Q301
XLR
10.4dB
XLR Type
PWM Modurator
(6.7dB)
Q507-Q510
2 3
1
RL501 RL502
Q301
Cold
10.4dB Q303
Q405-Q408
XLR
6
-B +B
Q302 0dB
MOS FET Driver
(7.4dB)
+3V
Q507-Q510
M
70kHz LPF
RCA
2
0dB LPF
+7V
RL502 -B(+27V)
Start,Stop Muting Circuit
Q701
MOS FET Relay Driver Q716
Q711
3
U7: NAPS-7793 CONTROL PC BOARD
F901 POWER 1A/125V
Sub Transformer
T9801 D9801-D9804
Con P +12V Power Relay Control circuit
Q9801,Q9802
MOS FET Muting Circuit Q9821,9820
Sreaker Outpu Control Circ Q9810,Q98
4
U7: NASW-7795 POWER SWITCH PC BOARD
F901 12A/250V
AC INLET
U1: NAPS-7788 PRIMARY POWER SUPPLY PC BOARD
D901
RL901
Inrush current Prevention Circiuit D902 Triac
Rectifier Circuit
D903-D906
Smoothing Capacitor
C909-C912
Switching circuit
Full Bridge Type Q881-Q884 FET Q869-Q876
Resonance Circuit
Line Filter
AC 100V 50/60Hz
Start Circuit
Q843-Q845
Rectifier Circui
D941-D944 +5V
5
U5: NAPS-7790 SWITCHING CONTROL PC BOARD
Constant Voltage Power Supply Q841,Q842 Constant Voltage Power Supply Q848
Control circuit
High-Brid Type (PFM & PWM)
+5V
DTA-9.4
E F G H
U16: NAAF-7798 TEMPERATURE SENSOR PC BOARD
+5V
Over Current Detection Q701
MOS FET Temperature Detection Cuircuit
Q709 R710 (PTC Themistor)
U15: NAAF-7797 POWER AMPLIFIER PC BOARD
RL701
DC Offset Detection
Q580, Q581
D705 DC Output Warning
Speaker Output Relay Driver
Q708,Q715
Q717
SPEAKER OUTPUT
-27V
+5V Temperature or
Current Protection and Temperature protection Circuit
Q704
Q717
Detection Circuit
Q751, Q752
Current Warning indicator
D751
Reset
Constant Voltage Power Supply Q9804
Q9822
+5V
U16: NAPS-7792 TRIGGER TERMINAL PC BOARD
Q9812
P9910
utput Relay l Circuit ,Q9811
Reset IC
Q9808
12V Trigger/ Cotrol Link Detection Circuit
Q9832-Q9833
12V TRIGGER CONTROL LINK IN
Multi Vibrator
Q9806
LED Driver
Q9813-Q9815
D9813 D9812
Standby/Warning (Red) Power (Blue)
it
High-Frequency Transformer T901
High-Speed Rectifer Diode D101 - D104
Smoothing Coil
Output Capacitor Arrey
C103-C106
+B (+27V) Bus plate GND Bus plate -B (-27V)
ance uit
U8: NAETC-7794 DISPLAY LED PC BOARD
T902 NFB Q817
Bus plate
ircuit
944
Error amplififer Circuit of Output voltage
U2: NAPS-7788 SECONDARY POWER SUPPLY PC BOARD
DTA-9.4
A B C D E F G H
DTA-9.4
BLOCK DIAGRAMS
+3V
LPF
RCA
2
+7V
+B+(27V) RL501
Q303
1
RCA Type
2 3 10.4dB
Q302 0dB
INPUT
Hot
MOS FET Driver
(7.4dB)
70kHz LPF
U16: NAAF-7798 TEMPERATURE SENSOR PC BOARD
+5V
Over Current Detection Q701
MOS FET Temperature Detection Cuircuit
U15: NAAF-7797 POWER AMPLIFIER PC BOARD
RL701
Q301
XLR
10.4dB
XLR Type
PWM Modurator
(6.7dB)
Q507-Q510
2 3
1
RL501 RL502
Q301
Cold
10.4dB Q303
Q405-Q408
XLR
6
-B +B
DC Offset Detection
Q580, Q581
D705 DC Output Warning
Speaker Output Relay Driver
Q708,Q715
Q717
SPEAKER OUTPUT
Q302 0dB
MOS FET Driver
(7.4dB)
+3V
Q507-Q510
70kHz LPF
RCA
Q709 R710 (PTC Themistor)
2
-27V
0dB LPF
+5V Temperature or
+7V
RL502 -B(+27V)
Start,Stop Muting Circuit
Q701
MOS FET Relay Driver Q716
Q711
Current Protection and Temperature protection Circuit
Q704
Q717
Detection Circuit
Q751, Q752
Current Warning indicator
D751
Reset
3
U7: NAPS-7793 CONTROL PC BOARD
F901 POWER 1A/125V
Sub Transformer
T9801 D9801-D9804
Constant Voltage Power Supply Q9804 +12V
Q9822
+5V
U16: NAPS-7792 TRIGGER TERMINAL PC BOARD
Q9812
P9910
Power Relay Control circuit
Q9801,Q9802
MOS FET Muting Circuit Q9821,9820
Sreaker Output Relay Control Circuit Q9810,Q9811
Reset IC
Q9808
12V Trigger/ Cotrol Link Detection Circuit
Q9832-Q9833
12V TRIGGER CONTROL LINK IN
Multi Vibrator
Q9806
LED Driver
Q9813-Q9815
D9813 D9812
Standby/Warning (Red) Power (Blue)
4
U7: NASW-7795 POWER SWITCH PC BOARD
F901 12A/250V
AC INLET
U1: NAPS-7788 PRIMARY POWER SUPPLY PC BOARD
D901
RL901
Inrush current Prevention Circiuit D902 Triac
Rectifier Circuit
D903-D906
High-Frequency Transformer T901
High-Speed Rectifer Diode D101 - D104
Smoothing Coil
Output Capacitor Arrey
C103-C106
+B (+27V) Bus plate GND Bus plate -B (-27V)
Smoothing Capacitor
C909-C912
Switching circuit
Full Bridge Type Q881-Q884 FET Q869-Q876
Resonance Circuit
U8: NAETC-7794 DISPLAY LED PC BOARD
Line Filter
AC 100V 50/60Hz
T902
Bus plate
NFB Q817
Start Circuit
Q843-Q845
Rectifier Circuit
D941-D944 +5V
5
U5: NAPS-7790 SWITCHING CONTROL PC BOARD
Constant Voltage Power Supply Q841,Q842 Constant Voltage Power Supply Q848
Control circuit
High-Brid Type (PFM & PWM)
Error amplififer Circuit of Output voltage
+5V
U2: NAPS-7788 SECONDARY POWER SUPPLY PC BOARD
DTA-9.4
A B C D E F G H
DTA-9.4
SCHEMATIC DIAGRAMS-4
POWERSUPPLY CONTROL SECTION
CAUTION
[NOTE] NC: No connection NU: No use
FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, REPLACE ONLY WITH FUSE OF SAME TYPE AND RATING INDICATED. 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.
1
A
V
From NAPS-7788
From NAPS-7788 From NAPS-7788
(P801A/P801B)
D901 RBV-2506
ATTENTION
From NAPS-7788
(P902A)
A V
AFIN D'ASSURER UNE PROTECTION PERMANENTE CONTRE LES RISQUES D'INCENDIE, REMPLACER UNIQUEMENT PAR UN FUSIBLE DE MEME TYPE ET CALIBRATION COMME INDIQUE.
BUS-BAR
BUS-BAR
BUS-BAR
BUS-BAR
VC+ VCVC-
P803B
NCH-0604 (LPI-0R9D20)
L882 (NO USE)
L881
1
NAPS-7790
U5 SWITCHING CONTROL PC BOARD
E881 (PRI)
C891 B471K-KX
C920
QETJ5104KPP2CS L903 NCH-1600 (DT-4020H)
3
P803A
P131B
P801C
L902 NCH-1600 (DT-4020H)
P902B
NAPS-7791
PTFM04BE222Q2N34B0 R181
UDD:168V UJJ:141V PRIGND Q883 STW26NM50
To NAPS-7789
(P131A)
D861 AK04
AK04
+5V
C862 104
2SC2120Y Q863 10 R873 Q864 2SA950Y Q862 2SC2120Y C861 330/35 Q861 2SA950Y
+5V
(1/2W)
D866 AK04 D865
D889
RL2
MTZJ10C MTZJ10C
D882 D881
D885 MTZJ10C
22/16
RL2
1 2 3
D886 MTZJ10C
AK04
D862
C892
4
5 6
2 1
DADC250V-225J
Q870 2SC2120Y
Q872 2SA950Y
C881
D863 AK04
C864
104
D890 RL2
MTZJ10C D888 D887
MTZJ10C
D864 AK04
C865
2 3
5 4
Q852
2SC2120
R892 68 (1/2W)
D884 D883 MTZJ10C MTZJ10C
22/16
1
1
C866 330/35
0.47 R876 (1/2W)
Q866 2SC2120Y
6
1
3
CAUTION: Do not contact neither a tester, digital volt meter etc. on this point. Don't touch by hand too. Because, there is a danger that a circuit will break down.
R851 8.2K
Q853
PRIGND
R875 0.47 (1/2W)
R852 6.8K
2SC2120
Q868 2SA950Y
R894 68 (1/2W)
D868 AK04
10 R874
RL2
22/16
1
6
D892
(1/2W)
SFPB76
3
3
SFPB76
D851
Q865 2SA950Y
2
2
R884 10 (1/2W)
C869
SEL4110R
2SC2120Y Q867
NSWT-3026 R882 10 T852
D894
Q884 STW26NM50
C870
D896
NSWT-3026 T854
4 5 3 2
104
Q882 STW26NM50
D867 AK04
Q875 2SC2120Y Q873 2SA950Y R872 10 Q876 2SA950Y Q874 2SC2120Y
TLP421
Q851
C882 DADC250V-225J
1K R855
222
C863
10 R871
R891 68 10 5 (1/2W) (1/2W)
3 1
D891
2
NSWT-3026 T851
6 R881
PRIGND R895 0.47
C867
D895
2
2 3 1
SFPB76
R883 10 (1/2W)
NSWT-3026 T853 22/16
4 3 C868
104
Q881 D893 SFPB76 STW26NM50
Q871 2SC2120Y Q869 2SA950Y
R893 68 (1/2W)
U14
TERMINAL PC BOARD
JL805B
R853 470
JL805A
R854 PTFM04BD222Q2N34B0
TH1 PROT
NAETC-7802
U11 POSISTOR PC BOARD
UDD:168V UJJ:141V
R842 470 (1W)
D802 D801
1SS355 1SS355
1SS355
R813 68
R805
D805
R804
1.5K
1.5K
R801
10K
R814
R810
1SS133
Q817
D847
R841 2.2K
R816
10K R817
Q813 R820 6.8K
Q813 2 1
14 3
4.7K
47/16
C811
(NO USE) R812 18K Q813
D841
47/16
Q806 2SA1312GR
C842
1 1CK 2 1K 3 1J 4 1PR
VCC 16 1CLR 15
5 4 Q814 74HC08 13 12 Q814 74HC08 10 9 Q814 74HC08
MTZJ5.6B
Q803 2SC3324GR
R826 C805 100D
C802 471J 14 2 7 Q813 74HCU04 C801 104
330J R809 15K
+5V
2
1 Q843 3 2SK2599 D843 SPX-G32S
6
R823 10
TLP421
Q812 74HC112
Q801
Q813 R811 C804 330J R808 15K
R802 680
C806
121K
C813
271
C843
22/35
D842
Q811 2SC3324GR R819
R807 12K
C853
R803
5.6K
1/50
220/16
D804 1SS355
1SS355
R806 180
D803
10K
Q808 2SC3324GR
8 GND
2Q 9
10
C812
103
8
C852
R824
PRIGND
(NO USE)
C848
Q844
7 2Q
2PR 10
33 (1/2W)
2SC2458GR
1/50
4.7K
R847 4.7K C846
Q813 74HCU04
Q815 RN1402
6 1Q
2J 11
+5V
O G I
R859
47/50 R844 47K
Q807 2SC3324GR
101J R818
104
1/50
12
13
10
Q848 78M05
MTZJ12C C845
C809
5 1Q
2K 12
11
1K
C807
R825
R845
10 9 8 4.7K 11 74HCU04 74HCU04
2CK 13
D844 C847 1SS133
R846 47K
Q802 2SC3324GR
1
2CLR14
D848
CAUTION
C803
Q814 7 74HC08
470/35
C814
1/50
C841
3 45 6 74HCU04 74HCU04
R861
4
R822 10
Q841 2SC2458GR
D845
Q804 2SA1312GR
Q810 2SA1312GR
27K
Q845 2SA992
MTZJ24D MTZJ24D
R827 1.5K
R848
0
TLP421
3
Q805 2SA1312GR
12K
Q809 2SA1312GR
R815 0
2
1
Q816 RN2402
C808 150J R821
C851
+5V
Q842 2SA1488
R849 (1/2W)
56K
+5V
10/16
PTGL05AR151H8P52B0 R862
470 (1W) 82K R843
DTA-9.4/DTA-7 UDD/UJJ RC-202725 PART-3 NCPS7788.SCH 2003/04/08 15:28:04 03/04/08
5
E841 (PRI)
DTA-9.4
A B C D E F G H
DTA-9.4
SCHEMATIC DIAGRAMS-3
POWER SUPPLY SECTION
- +
1
NAPS-7788 U1
AC-H R920 1M B152K-KX C903 P996B P997B AC-G C901 103 C904 B152K-KX
PRIMARY POWER SUPPLY PC BOARD
QETJ5105KRP2CS R919 47 (1/2W) L905 (NO USE) 4 1 C905 QEX2E104KTP2CS L901 NCH-3596 (SC-15-05J) 4 1 C902
P904 D902 SM25GZ51
2 1 1K(1/2W) 3 R904 104 (50V) R905 270 (1W) 12V INPUT FOR TEST D903 D1NL40 D904 D1NL40 D905 D1NL40 D906 D1NL40 D941 EK16 D942 EK16 D943 EK16 R924 R923 33K 33K D907 SEL4110R (1W) (1W) 1500/200 D944 EK16 (NO USE) (NO USE) (NO USE) (NO USE) C912 L941 NCH-1602
NAPS-7789
T902 NSWT-3025
6 12
U2 SECONDRY POWER
SUPPLY PC BOARD
+27V
2
P101B
P101A
D101 FMG33S
L101 NCH-1605 (DT-3620) +27V +27V
2
C918
3
3
+B
E122 BUS BAR
R903 4.7 (5W) C909
1500/200
1500/200
C910
3.3M E902 RL902 E906(SEC) E901 E903
C924 (NO USE) C925 (NO USE) B102K-KX C906 (250VAC)
C911
RL901
C926 472
1500/200
R901
(CASSIS) (CASSIS) (PRI) E904 (SEC) C913 (NO USE)
PRI DC LIVE WARNING L904 NCH-1594 (FK-120D) PRIGND R911 100K(1/2W) C917 DADC400V-105J C916 DADC400V-105J R912 100K(1/2W) R913 100 (1W) R914 100 (1W) 12
1
7
D102 FMG33R D103 FMS33S
GND GND
R102
R104
4
3 BL02RN2-R62 L912 R910 C921 L913 2.2(FUSE)
C104 3900/35
C106 3900/35
E905 (SEC)
C907 B102K-KX (250VAC)
6
12
2
1
D931 1SS133
R915 100 (1W)
B471-KX 1 7 L906 NCH-3597 (BP-E35P-4)
P801B AC-G2 AC-H2
BUS-BAR BUS-BAR BUS-BAR BUS-BAR
P801A D901 RBV-2506
VC+ VCVC-
P902A
P903B
R1060.22 (1/2W)
C923 R916 R917 R918 100(1W) 100(1W) 100 (1W) B471-KX
UDD UJJ
NO USE
RL+ GND2 RL-
R107 0.22 (1/2W)
P985A
P985B NO USE
P903A
P985A BUS-BAR UDD
1
7
6
E126
P985B BUS-BAR UJJ
D104 FMG33R
C101
(NO USE) C922
(NO USE)
2
RL901,RL902 NRL-1P10A-DC12-140
E101 (SEC) L102
-27V BUS BAR
-B
E124
T901 NSWT-3025
BUS BAR
-27V
NCH-1605 (DT-3620)
-B GND +B 4.7K R149
P108
+27V
1K R141 R151 15 (1/2W) (1/2W) 5.6K 2.2K R147
C134 R110 6.8K (NO USE) D105 100/100 MTZJ5.6B
VOLTAGE CHECK
(1/2W) 5.6K R137
R148
D136
C132 472
R114 (NO USE)
Q135 2SC1845
To NAPS-7790
(P801C)
(P902B)
REGURATED D133 SEL4110R Q137 2SC1845
LOW CURRENT 220 R150
Q138 2SC1845 Q103 TLP421
4.7K R108
R112
MTZJ5.6B MTZJ5.6B
4.7K R109
R115 (NO USE)
P131A
1.2K R138
D134
33K
A
V
470 R140
110 R146
D135
A
V
R184
1KB
R152 15 (1/2W)
F901 F902
P996A
AC-G
-27V
PTFM04BD222Q2N34B0
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
JL132A
JL132B
(NO USE)
P997A
VOLTAGE ADJUST
R168 (NO USE) D162 1SS133 R172 47K R161 5.6K R163 1.8K
P995
4
UJJ:100V 50/60Hz UDD:120V 60Hz
P9911A P9911B
U2
POSISTOR PC BOARD
JL9906B
AC INLET
D106 MTZJ5.6B
2 R139 3
R169 1.2K
R111 6.8K
12A/250V
AC-H
AFIN D'ASSURER UNE PROTECTION PERMANENTE CONTRE LES RISQUES D'INCENDIE, REMPLACER UNIQUEMENT PAR UN FUSIBLE DE MEME TYPE ET CALIBRATION COMME INDIQUE.
NAETC-7803
GND2
ATTENTION
C133 47/16
PC BOARD
Q136 2SC1815 Q134 2SC1815
1
Q102 2SC1845
R162
6.8K
47/16 C162 102
C161
R164
1.8K
R166
10K R171
103
470
GND2
(P9911C)
E102 (SEC)(NO USE)
5
R167
To NAPS-7793
(NO USE)
P161
C163
Q161 2SC2458GR
Q162 2SC2458GR
47K R170
QUE DES FUSIBLES DE MEME TYPE. CE DARNIER EST INDIQUE LA QU LE PRESENT SYMBOL EST APPOSE.
D161 SEL4110R PROT R165 1.5K
RL+ RL+12V PROT +12V GND2
Q163 2SC2458
C118 (NO USE)
D108
R113
NAPS-7801 U3 AC INLET
CAUTION
FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, REPLACE ONLY WITH FUSE OF SAME TYPE AND RATING INDICATED.
[NOTE] NC: No connection NU: No use
To NAPS-7791
(P131B)
D107
1SS133 1SS133
47K R142
R144 150
R145 150
33K
Q101 2SA992
C117
3
To NAPS-7790 To NAPS-7790
To NAPS-7790
SEL4110R
To NAPS-7793
(JL9906A)
PROT TEST
To NAAF-7797
C103 3900/35
C927 (NO USE)
R101
R103
C105 3900/35
UDD:168V UJJ:141V
R921 (NO USE)
R909 0.22 (1/2W)
DTA-9.4
A B C D E F G H
DTA-9.4
SCHEMATIC DIAGRAMS-2
CONTROL SECTION NAPS-7793 1 U7 CONTROL PC BOARD
D9816 R9829 R9830 1M C9820 104J 1SS133 C9817 220/6.3 R9841 10K
Q9827 74HC123
1 1A VCC 16 2 1B 1RX/CX 15 3 1CLR 1CX 14 1Q 13 4 1Q 5 2Q 2Q 12 6 2CX 2CLR 11 7 2RX/CX 2B 10 8 GND 2A 9
C9816 390K 10/16 R9816
D9817 1SS355
R9831 47K
R9840 10K 10K Q9831 RN1402 R9835 1M Power Supply Control R9803 2.2k R9832 R9804 4 3 Q9825 7S08 Q9828 2SK3018 Q9802 RN1401 Q9801 2SA965-Y 2.2k
D9819 C9815
12.0 4.7/50
CAUTION
A V
From NAETC-7801
(P9911A, P9911B)
AM01Z D9820 AM01Z D9802 AM01Z
R9837 10K
Q9826 RN1402
FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, REPLACE ONLY WITH FUSE OF SAME TYPE AND RATING INDICATED.
12.0
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
P9911C
NASW-7795
F9801 1A/125V C9801 472M
103J
U9
POWER SWITCH PC BOARD
C9850 103M S9801
2200/25
C9802
C9805
AC-H
1 2 3 4
2
9 8 7 6 5
R9801 0.47 (1/2W) D9801 AM01Z D9803 AM01Z D9804 0 AM01Z R9802 10K 2 1 Q9803 74HC00 5
3
6
2 Q9822 TC7W14
1 2
RATING REFER TO THE MARKING ADJACENT TO THE SYMBOL
JL9906A
AC-G P9904A (BRN) P9904C
T9801 NPT-1461
To NAPS-7789
(JL9906B)
ATTENTION
A V
POWER P9904B (YEL) Q9803 74HC00 14 5 4 D9821 Q9830 6 1SS355 2SK3018 1SS355 D9818 R9836 4.7K Q9823 RN2404 C9813 47/16
R9821
C9806
47/16
1
10K
AFIN D'ASSURER UNE PROTECTION PERMANENTE CONTRE LES RISQUES D'INCENDIE, REMPLACER UNIQUEMENT PAR UN FUSIBLE DE MEME TYPE ET CALIBRATION COMME INDIQUE.
E9901 Q9822 TC7W14 8 7 4
R9805
Q9804 78M05 I GO
5.0
Power Supply Warning 470 R9834 (NO USE) 5 4 Q9829 3 7S08 Q9805 TLP421 C9803 R9828 10K 103J
56K
NAETC-7794
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.
7
U8
DISPLAY LED PC BOARD
Standby/Warning (Red) D9813 SLR-332VR P9907B Power (Blue) D9812 SDLB30DO P9907A R9817 180 Q9813 RN2402
D9805 SEL4110R Q9824 RN1402 Q9819 RN1402
R9827
Q9817 TC7W74 1 CK VCC8 2 D PR 7 3 Q CLR 6 4 GND Q 5
1 2
To NAAF-7797
(P701)
3
1SS355 R9819 C9814
102J
[NOTE] NC: No connection NU: No use
5.0 Q9818 RN2404 R9818 D9814 180
Q9822 TC7W14
3 5 C9818 102J R9833 10K
5.0
10K
P9909
D9810 1SS355 D9815 Q9815 1SS355 RN1402 1SS355 D9811
Q9814 RN1403
5.0 D9806 1SS355 1SS355 D9808 1SS355 C9810 104J R9807 100K R9806 100K R9808 1M
Q9806 74HC123
1 2 3 4 5 6 7 8 VCC 16 1A 1B 1RX/CX 15 1CLR 1CX 14 1Q 13 1Q 2Q 2Q 12 2CX 2CLR 11 2RX/CX 2B 10 GND 2A 9
NAPS-7792
R9842
Q9803 74HC00 Q9812 TLP521-2GB 8 1 2 R9814 R9822 1K 7 10K Q9833 RN2404 12 13 10K
4
12V TRIGGER TERMINAL PC BOARD
P9910 P9908A 12V TRIGGER CONTROL LINK IN P9908B
104J
U6
C9807
11
Q9832 RN1402 1SS355
Q9807 RN1402
C9808 1/50
D9822
Output Relay Control R9812 220 Q9811 2SA950-Y
C9809 R9809 1M 1/50
D9807
R9813 150 (2W)
2.0
C9821 R9839 104J R9815 1K 47K
5.0 R9810 10K R9820
MOSFET Mute Control R9824 150 (2W) Q9820 2SA950-Y R9826 1.5K R9823 R9825 1.5K 1.5K 220
C9804 103J
3 4
6 5
Q9816 RN2404 Q9812 TLP521-2GB 5.0
Q9808 M51957B
1 2 3 4 NC1 NC3 8 VCC 7 IN NC2 OUT 6 GND C 5 C9812 104J
2.0
5.0 (NO USE) Q9810 RN1404
2.7K
C9819
1SS355 Q9803 74HC00
Q9809 RN1404
C9811 22/35
5
E9902 E9903
10 9
8
D9809
R9811
Q9821 RN1402
DTA-9.4
A B C D E F
NOTE
. THE COMPONENTS IDENTFIED BY MARK . . . . .
R318 R340 33K
DTA-9.4
G H
SCHEMATIC DIAGRAMS-1
POWER AMPLIFIER SECTION
P303 (NO USE)
R327 22
P301
R334 120 R336 10K C312 681J
C313 100/50
R337 10K
R339 33K 4 2 3
BL02RN1-R62
RCA type
R331
R344 0 P608B
R335 100 R342
C314 R338 10K 100/50
Q303
8
1
(1/2W)
1
NJM4565M
Q402 RN2402 UDZ5.6B R408 R407 C401 100K
100
15.0
R329 22(1/2W) R409 5.6K
22/16 D401
560
10K R316 7 6
.
10K
ARE CRITICAL FOR SAFETY. REPLACE ONLY WITH PART NUMBER SPECIFIED. VOLTAGE(MEASURED WITH VOLTMETER) IS DC VOLTAGE. (NO INPUT SIGNAL) ELECTROLYTIC CAPACITORS ( ) ARE IN uF/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.
P302
4
R301 R305 10K C303 C301 681J R306 10K 47/50 C304 47/50
J301 (NO USE) 220/16 C309
R309 33K 4 R308 10K 2 3 R310 33K
R405 C306 331K 220/16 C311 33
R406 33 DC OFFSET ADJUSTMENT R411 200
C307 331K R325 10K 1
J302 (NO USE)
R311 4.7K
INPUT
R307 10K
Q401 2SA1162-GR
Q303
5
0.5
NJM4565M
U15
NAAF-7797
R597 (NO USE)
POWER AMPLIFIER PC BOARD
R320 33K 7 6 R319 5 R321 33K 10K R317 10K
INPUT SEL
RCA 1 3 2 S301 R341
100K
R410 200
R314 R312 10K 6 R545 22K R547 101K/100V R315 3.9K R330 C526 33K 101K /100V 5 10K 4 Q302 8 7
XLR type
1
3
2
120 R302 120 R343 0 R304 R303 100 100
R430 100(B)
C315 47/50 R543 C524 22K
Q403 2SA1162-GR
Q404 2SA1162-GR R402 4.7K
R323 10K 2 R544 3 22K R546 101K/100V R326 3.9K C523 33K C525 101K /100V
S301
C316 47/50 R542 22K R322 5
S/E 4 6 BAL
SPEAKER OUTPUT
P651
P502
C586 1SS355 3 D706 4 C585 C587 NC 1 2 L507 NCH-1607 2 1 RL701 NRL-2P5A-DC24-142 4 3 8 7
1
C404
R403 47K
R404 47K
102J
C405
C308
R328 22 (1/2W)
220/16
(TA5)
2
22 (1/2W)
NC
220/16
102J
NJM5532M
100K
C302 C305 681J 47/50
8 NJM4565M
BAL
NJM5532M C310
R401 4.7K
NJM4565M
104K /250V
Q301
Q302
Q301
P501
P501A
-15 +15 15 R418 R419 10 R595 22 (1/2W)
R596 22 (1/2W) C584 47/16
P607B E501 NO USE
UDD : Yes (with FL core) UJJ : No (only crimp AS)
-15
R414 22K
R415 22K
Q405 2SA1462-L (Y34) R416 3.3K C412 101K C402 102J
Q406 2SA1462-L (Y34) R417
C410 220/6.3 (PW)
C408
104J
47/16
DC Output Detector R585 220K 4 2 3 Q580 R586 1M 8 NJM4565M 1 5 6 Q580 7 R588 10K 2 3 R584 220K NJM4565M NJM4565M 4 Q581 8 1 D581 1SS355 R594 R592 R589 10K 10K R591 4.7K D580 1SS355 6 5 2.7K C582 474J R593 10K Q581
[NOTE] NC: No connection NU: No use
10
C409
C580 R580 100K
104J
101K C403 102J R412 10 Q408 2SC3735-L (Y34)
C411 220/6.3 (PW)
474J R582 47K
3.3K C413
R581 100K
C583
R583 47K
7
C581
Q407 2SC3735-L (Y34)
105J
R587
100K
R590
R413 10
NJM4565M
3
R731 10K R708 68K R727 Q709 2SC2712GR P605 BUSBAR R548 100K C529 681J/100V EC21QS10 D505 R541 12K Current Protection 0 26.8 UDZ15B UDZ15B D508 D507 R550 100K
R717 10K D703 1SS355
5.0 C614 P703 10/16
4.7K
NAAF-7798
P702
GNDC +5VC ERR FMUTE OUTRL PHTCP GMUTE
270
C703
2
1 Q701 74HC14
R709 (NO USE)
D704 1SS355 D707 UDZ5.1B R728
26.8 UDZ15B UDZ15B D502 D501
10K
R540 270K
26.8 R507 (NO USE) R503 560 Q501 2SA1462-L (Y34) 121K R505
74HC14 74HC14 Q701 Q701
(NO USE)
R522
R526
560
R514
5 4
R512 1K 2.2 1SS355 D517 1SS355 Q517 2SC1622A -D18 R559 R558
Q515 2SA1162-GR
R531 1K R533 D518 D514 1SS355 100/16 C516 Q518 2SC1622A -D18 2.2
100/16
C507
R501
390 C503
P503 BUSBAR
P504 BUSBAR
R561 R560 22K 6.8K
C512
121K R520
Q503 2SC3733-L
22K 6.8K
C505 22/63
C514 22/63
D513
R524
R751 47K
C751
R510 2.2
1SS355
470/16
56
C501
470/16
R753
10K
R552 (NO USE)
R553 C513 (NO USE)
(NO USE)
R511 2.2
R509
(NO USE)
C534 334J R519 R518 C506 22/63 Q513 2SC1622A -D18 10 12K 8.2K C509 273J
390 470/16 C504
R516 0.047x 2 (5W+5W)
L505 NCH-1590 13U
R539 C521 153J/250V 27(2W) C519 C520 824J/250V 824J/250V
L506 NCH-1590 13U
R517 0.047x2 (5W+5W)
C535 334J R538 R537 12K 8.2K C518 273J
R529 2.2
C510
Q713 RN1402
C752 104
2
7
C502
R528
470/16
R530 2.2
C511
R506
C515 22/63
R502
121K
R525
56
121K R521
4
56
Q514 2SC1622A -D18 R534
C707 104
Over Temp. & Over Current Warning
Q754 RN1402
R508 (NO USE)
100/16
C508
R515
C517
(NO USE)
R523
EC21QS10
EC21QS10
UDZ30B 8
7 UDZ30B
D506
D512
2 L502 NCH-1470 1.5U UDZ15B UDZ15B D504 D503 -26.8 RL502 1 3 Q506 FQP33N10 R549 100K
R723 390
D515
D516
120 R711
R705 R712
D510 D509
UDZ15B
L504 NCH-1470 1.5U
R551
100K
R722 390
UDZ15B
C618
C613
10/50
R605 120
C701
RL502 NRL-2P2A-DC24-166 R721 680
10/16
P606 BUSBAR
C532 RL501 681J/100V NRL-2P2A-DC24-166
R608 R603 5.6K 220 (2W)
3.0
120
Q605 2SA1930
R612 100 (1/2W)
-26..8 +7.0
-26.8
47/16
1 2
8 7
D708 1SS355
Q706 RN1404
Modulator Operation D710 SEL2910A R719 R706 Q719 RN1404 6.8K
Q708 2SA965-Y 2.2K
Q607 2SC2712-GR D601 UDZS3.6B C609 100/6.3 (PW) C610 100/6.3 (PW)
Modulator Mute
C606 0.47/50 Q602 NJM79M15FA I G O
C605 0.47/50 Q601 NJM78M15FA
Q711 TLP521-2GB
5.0
I G O
R730 C705
100K 104J
R604 5.6K
C608 10/16(PW) I G O Q604 79M07HF
C607 10/16(PW) I G O Q603 78M07HF
Q608 2SA1162-GR R606 120 5.0 Q707 RN2402 R609 220 (2W)
5.0 Q705 RN2402
330 P704 C708 104 9 R735 8 4.7K R736 Q701 74HC14 FlipFlop Clear R729 1K 100K 13 14 12 7 Q701 74HC14 Q718 RN1402
56K
-7.0
R707A
R720
R707 56K
22K
D602 UDZS3.6B
D705 R725 SEL2110R
Q715 2SA1162-GR
(1W)
C530 681J/100V
Q512 FQP33N10
4
Q702 RN1402
R734
-7.0
Q701 74HC14 10 11
D709
10K
8
7
15K
330
RL501
1SS355
R701
6
(1W)
R555 15 (1W)
R557 15 (1W)
R527
560
Q502 2SC3735-L (Y34)
R724 390
R504
560
Q510 2SA1460-L
5
Q508 2SC3735-L (Y34)
26.0
Q610 78L05 I GO
5.0
(1W)
Q504 2SA1460-L
R513 1K
R532 1K
100/16
10
390
10/16
P607A (NO USE)
56
390
Q509 2SC3733-L
Q507 2SA1462-L (Y34)
5.0
2 Q717 TLP521-2GB 1
5 TC7S14F 4 1 3
D751 SEL2110R 5.0 Q753 RN1402
R755
10K
5
Q505 FQP22P10
R556 15 (1W)
Q511 FQP22P10
R752
L501 NCH-1470 1.5U
EC21QS10
RL502 4 6
C522 123J
C531 681J/100V D511
1 3 2 RL501 L503 NCH-1470 1.5U
100K C706 103
0 R733
100 3
Thermal Protection 5.0
100 100
POSISTOR PC BOARD
R754 330
R554 15 (1W)
R732
R718 Q751 Q752 TC7W74FU
1 CK VCC 2D PR 3 Q CLR 4 GND Q 8 7 6 5
7.0
P701
GNDC +5VC ERR FMUTE OUTRL PHTCP GMUTE
Q704 TC7W74FU
6 1 CK VCC PR 2D 3 Q CLR 4 GND Q 8 7 6 5
8
Q716 2SC1622A -D18 10K C611 C612
26.8
R702 22K R703
R726 Q714 RN1402 Q717 TLP521-2GB 6 5 -26.8 Output RL Mute 3 4 100
R602
R601 47 (1W)
47 (1W)
C617 10/50(PW) R611 100(2W)
C616 10/50(PW) R610 100(2W)
Q606 2SC5171
-3.0
105J 105J
5
DC Output Warning
-26.8
26.8
C615 104J (NO USE)
BUSBAR P604
P608A
C601 10000/35 L601 NCH-1591 30U +27 P601A
C602 10000/35 L602 NCH-1591 30U -27 P601C
R607 0
HeatSink
E601
Q711 TLP521-2GB
6 5
R713 3 4 100
C603 C604 105J 105J P601B
Power MOSFET Mute
From NAPS-7789
From P701 / To P702 OF ANOTHER CHANNELS' AMP BOARD or NAPS-7793
JL701A
JL701B
R710 04BD222
U16
1/50
DTA-9.4
A B C D
SCHEMATIC DIAGRAMS-4
POWERSUPPLY CONTROL SECTION 1
From NAPS-7788
From NAPS-7788 From NAPS-7788
(P801A/P801B)
D901 RBV-2506
BUS-BAR
BUS-BAR
BUS-BAR
BUS-BAR
P801C
NCH-0604 (LPI-0R9D20) L882 (NO USE) L881 1
NAPS-7790
U5 SWITCHING CONTROL PC BOARD
E881 (PRI)
C891 B471K-KX
L902 NCH-1600 (DT-4020H)
C920
QETJ5104KPP2CS L903 NCH-1600 (DT-4020H) +5V
3
UDD:168V UJJ:141V PRIGND Q883 STW26NM50
D861 AK04
AK04
+5V
C862 104
2SC2120Y Q863 10 R873 Q864 2SA950Y Q862 2SC2120Y C861 330/35 Q861 2SA950Y
(1/2W)
D866 AK04 D865
D889
RL2
MTZJ10C MTZJ10C
D882 D881
D885 MTZJ10C
22/16
RL2
1 2 3
D886 MTZJ10C
AK04
D862
C892
222
C863
4
5 6
2 1
DADC250V-225J
Q872 Q870 2SA950Y 2SC2120Y
C881
C882 DADC250V-225J Q884 STW26NM50 2
D863 AK04
C870
C864
104
2SC2120Y Q867 10 R874 Q868 2SA950Y Q865 2SA950Y
RL2
MTZJ10C D888 D887
MTZJ10C
D864 AK04
C865
2 3
5 4
R892 68 (1/2W)
D884 D883 MTZJ10C MTZJ10C
22/16
1
1
R894 68 (1/2W)
5 6
2 1
D868 AK04
22/16
1
6
D892
(1/2W)
SFPB76
3
D890 RL2
NSWT-3026 R882 10 T852
D894 2
D896
3
SFPB76
R884 10 (1/2W)
NSWT-3026 T854
4 3
104
Q882 STW26NM50
D867 AK04
Q875 2SC2120Y Q873 2SA950Y R872 10 Q876 2SA950Y Q874 2SC2120Y
C869
Q866 2SC2120Y
10 R871
R891 68 10 5 (1/2W) (1/2W)
3 1
D891
2
NSWT-3026 T851
6 R881
PRIGND R895 0.47
C867
D895
2
2 3 1
SFPB76
R883 10 (1/2W)
NSWT-3026 T853 22/16
4 3 C868
104
Q881 D893 SFPB76 STW26NM50
Q871 2SC2120Y Q869 2SA950Y
R893 68 (1/2W)
3
PRIGND
3
CAUTION: Do not contact neither a tester, digital volt meter etc. on this point. Don't touch by hand too. Because, there is a danger that a circuit will break down.
+5V
D802 D801 1SS355 1SS355 1SS355 R813 68 R804 R805 1.5K D805 1.5K R801 10K
R814 R815 0 Q816 RN2402 R827 1.5K C808
R810
R816
10K R817
Q804 2SA1312GR
Q817
0
TLP421
Q805 2SA1312GR
12K
Q809 2SA1312GR
150J R821 Q813 R820 6.8K 27K Q813 2 1 14 3
Q810 2SA1312GR
4.7K
Q806 2SA1312GR
C802 471J 14 2 7 Q813 74HCU04 C801 104
330J R809 15K
C805 100D R812 18K Q813
(NO USE)
+5V 1 1CK 2 1K 3 1J 4 1PR VCC 16 1CLR 15
TLP421
5 4 Q814 74HC08 13 12 Q814 74HC08 10 9 Q814 74HC08
47/16
C811
Q803 2SC3324GR
CAUTION
C803
C814
1/50
4
R826
3 45 6 74HCU04 74HCU04
Q814 7 74HC08
R8 10
6
R8
Q812 74HC112
Q801
Q813 R811 C804 330J R808 15K
1
Q802 2SC3324GR
1
2CLR14 2CK 13
C809 104
R802 680
C806
121K
C813
10 9 8 4.7K 11 74HCU04 74HCU04
271
C807
Q811 2SC3324GR R819
Q807 2SC3324GR
12
13 Q813 74HCU04
Q815 RN1402
101J R818 4.7K
5 1Q 6 1Q 7 2Q 8 GND
2K 12 2J 11 2PR 10 2Q 9
11
R8
1
R807 12K
R803
5.6K
D804 1SS355
1SS355
R806 180
5
D803
10K
Q808 2SC3324GR
8
R8
1
DTA-9.4
E F G H
CAUTION
[NOTE] NC: No connection NU: No use
A V
FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, REPLACE ONLY WITH FUSE OF SAME TYPE AND RATING INDICATED.
ATTENTION
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.
From NAPS-7788
(P902A)
A V
AFIN D'ASSURER UNE PROTECTION PERMANENTE CONTRE LES RISQUES D'INCENDIE, REMPLACER UNIQUEMENT PAR UN FUSIBLE DE MEME TYPE ET CALIBRATION COMME INDIQUE.
VC+ VCVC-
P803B
P803A
P131B
P902B
NAPS-7791
PTFM04BE222Q2N34B0 R181
To NAPS-7789
(P131A)
1K R855
U14
TERMINAL PC BOARD
TLP421 SEL4110R D851
Q851
JL805B
R853
JL805A
R854 PTFM04BD222Q2N34B0
TH1 PROT
NAETC-7802
Q852
2SC2120
470
C866 330/35
R851 8.2K
Q853
R875 0.47 (1/2W)
R852 6.8K
2SC2120
0.47 R876 (1/2W)
U11 POSISTOR PC BOARD
UDD:168V UJJ:141V
R842 470 (1W)
C851
+5V
1SS133 D847 2
Q842 2SA1488
1
R848
R841 2.2K
470/35
C841
R861
R822 10
Q841 2SC2458GR
C811
2
MTZJ5.6B
D841
C842
47/16
1 Q843 3 2SK2599 D843 SPX-G32S
R823 10
D848
D845
Q845 2SA992
MTZJ24D MTZJ24D
3
R849 (1/2W)
10/16
PTGL05AR151H8P52B0 R862
470 (1W) 82K R843
56K
C843
22/35
D842
+5V
220/16
R824 10
C853
C852
1/50
C812
103
PRIGND
(NO USE)
C848
Q844
33 (1/2W)
2SC2458GR
R847 4.7K C846
1/50
O G I
R859
47/50 R844 47K
1/50
10
Q848 78M05
MTZJ12C C845
1K
R825
D844 C847 1SS133
R845
R846 47K
DTA-9.4/DTA-7 UDD/UJJ RC-202725 PART-3 NCPS7788.SCH 2003/04/08 15:28:04 03/04/08
E841 (PRI)
DTA-9.4
A B C D
SCHEMATIC DIAGRAMS-3
POWER SUPPLY SECTION 1
NAPS-7788 U1
AC-H R920 1M P996B P997B AC-G B152K-KX C903 C901 QETJ5105KRP2CS L905 (NO USE) 4 1 C905 QEX2E104KTP2CS 103 C902 R919 47 (1/2W) L901 NCH-3596 (SC-15-05J) 4 1 C904 B152K-KX
PRIMARY POWER SUPPLY PC BOARD
D902 SM25GZ51
2 1 1K(1/2W) 3 R904 104 (50V) R905 270 (1W)
D903 D1NL40 D904 D1NL40 D905 D1NL40 D906 D1NL40
2
2
R903 4.7 (5W) C909
UDD:168V UJJ:141V
R924 R923 33K 33K D907 SEL4110R (1W) (1W) 4 3 2 1 C921 R913 100 (1W) R914 100 (1W) 12 R915 100 (1W) (NO USE) C922 B471-KX 1 7 L906 NCH-3597 (BP-E35P-4) 1500/200 1500/200 1500/200 1500/200 6 C910 C911 C912
RL901
C926 472
R901 3.3M E902 E901 E903
C927 (NO USE)
R921 (NO USE)
C924 (NO USE) C925 (NO USE) B102K-KX C906 (250VAC)
C918
3
3
RL902 E906(SEC)
(CASSIS) (CASSIS) (PRI) E904 (SEC) C913 (NO USE)
PRI DC LIVE WARNING L904 NCH-1594 (FK-120D) PRIGND R911 100K(1/2W) C917 DADC400V-105J C916 DADC400V-105J R912 100K(1/2W)
E905 (SEC)
C907 B102K-KX (250VAC)
2
RL901,RL902 NRL-1P10A-DC12-140 D931 1SS133
C923 R916 R917 R918 100(1W) 100(1W) 100 (1W) B471-KX
P801B AC-G2
BUS-BAR BUS-BAR BUS-BAR BUS-BAR
P801A AC-H2 D901 RBV-2506
3
To NAPS-7790
To NAPS-7790 To NAPS-7790
(P801C)
To N
(
NAPS-7801 U3 AC INLET
12A/250V
F901 F902
CAUTION
A V
[NOTE] NC: No connection NU: No use
FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, REPLACE ONLY WITH FUSE OF SAME TYPE AND RATING INDICATED.
PC BOARD
AC-H
ATTENTION
P996A
AC-G
A V
AFIN D'ASSURER UNE PROTECTION PERMANENTE CONTRE LES RISQUES D'INCENDIE, REMPLACER UNIQUEMENT PAR UN FUSIBLE DE MEME TYPE ET CALIBRATION COMME INDIQUE.
(NO USE)
P997A
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
AC INLET
P995
4
UJJ:100V 50/60Hz UDD:120V 60Hz
P9911A P9911B
QUE DES FUSIBLES DE MEME TYPE. CE DARNIER EST INDIQUE LA QU LE PRESENT SYMBOL EST APPOSE.
To NAPS-7793
(P9911C)
5
DTA-9.4
E F G H
- +
P904
12V INPUT FOR TEST
NAPS-7789
L941 NCH-1602
U2 SECONDRY POWER
SUPPLY PC BOARD
+27V
D941 EK16 D942 EK16 D943 EK16 D944 EK16
T902 NSWT-3025
6 12
P101B
P101A
D101 FMG33S
L101 NCH-1605 (DT-3620) +27V +27V
+B
E122 BUS BAR
1
7
D102 FMG33R D103 FMS33S
GND GND
C106 3900/35
6
12
L913
2.2(FUSE) (NO USE) C101 E101 (SEC) L102
P902A
VC+ VCVC-
P903B
R1060.22 (1/2W)
UDD UJJ
NO USE
RL+ GND2 RL-
R107 0.22 (1/2W)
P985A
P985B NO USE
P903A
P985A BUS-BAR UDD
1
7
E126
P985B BUS-BAR UJJ
D104 FMG33R
-27V BUS BAR
-B
E124
BL02RN2-R62 L912 R910
C104 3900/35
T901 NSWT-3025
BUS BAR
-27V
NCH-1605 (DT-3620)
-B GND +B 4.7K R149
P108
+27V
1K R141 R151 15 (1/2W) (1/2W) 5.6K 2.2K R147
C134 R110 6.8K (NO USE) D105 100/100 MTZJ5.6B
VOLTAGE CHECK
(1/2W) 5.6K R137
R148
D136
(P902B)
C132 472
R114 (NO USE)
Q135 2SC1845
REGURATED D133 SEL4110R Q137 2SC1845
LOW CURRENT 220 R150
Q138 2SC1845 Q103 TLP421
4.7K R108
R112
To NAPS-7791
(P131B)
P131A
D107
1SS133 1SS133 MTZJ5.6B MTZJ5.6B 4.7K R109 R115 (NO USE) D134 33K C118 (NO USE) D108 R113
47K R142
R144 150 Q136 2SC1815
R145 150
1.2K R138
C133 47/16
470 R140
110 R146
D135
NAETC-7803
R184
GND2
-27V
PTFM04BD222Q2N34B0
JL132A
JL132B
VOLTAGE ADJUST
R168 (NO USE) D162 1SS133 R172 47K R161 5.6K R163 1.8K
D106 MTZJ5.6B
2 R139 3
1KB
R152 15 (1/2W)
U2
POSISTOR PC BOARD
JL9906B
R169 1.2K
R111 6.8K
Q134 2SC1815
1
Q102 2SC1845
D161 R162 6.8K SEL4110R PROT Q162 2SC2458GR C163 R165 1.5K
47K R170
RL+ RL+12V PROT +12V GND2
Q163 2SC2458
33K
Q101 2SA992
C117
o NAPS-7790
SEL4110R
To NAPS-7793
(JL9906A)
47/16 C162 102
C161
R164
1.8K
R166
10K R171
103
470
GND2
E102 (SEC)(NO USE)
(NO USE)
R167
P161
Q161 2SC2458GR
PROT TEST
To NAAF-7797
C103 3900/35
(NO USE) (NO USE)
(NO USE) (NO USE)
R101
R102
R104
R103
C105 3900/35
R909 0.22 (1/2W)
DTA-9.4
A B C D
SCHEMATIC DIAGRAMS-2
CONTROL SECTION NAPS-7793 1 U7 CONTROL PC BOARD
D9819 C9815 R9802 47/16 1 56K 4 10K 10 9 D9811 R9842 1SS355
12
CAUTION
A V
From NAETC-7801
(P9911A, P9911B)
FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, REPLACE ONLY WITH FUSE OF SAME TYPE AND RATING INDICATED.
AM01Z D9802 AM01Z
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
P9911C
NASW-7795
F9801 1A/125V C9801 472M
AC-H
103J
U9
POWER SWITCH PC BOARD
C9850 103M S9801
C9802
1 2 3 4
2
9 8 7 6 5
R9801 0.47 (1/2W) D9801 AM01Z D9803 AM01Z D9804 0 1SS355 AM01Z
RATING REFER TO THE MARKING ADJACENT TO THE SYMBOL
AC-G P9904A (BRN) P9904C
T9801 NPT-1461
ATTENTION
A V
POWER P9904B (YEL) Q9803 74HC00 14 5 4 D9821 Q9830 6 1SS355 2SK3018 1SS355 R9836 4.7K D9818 Q9823 RN2404 C9813
AFIN D'ASSURER UNE PROTECTION PERMANENTE CONTRE LES RISQUES D'INCENDIE, REMPLACER UNIQUEMENT PAR UN FUSIBLE DE MEME TYPE ET CALIBRATION COMME INDIQUE.
E9901
Q98 TC7W 8
NAETC-7794
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.
7
U8
DISPLAY LED PC BOARD
Standby/Warning (Red) D9813 SLR-332VR P9907B Power (Blue) D9812 SDLB30DO P9907A R9817 180 Q9813 RN2402
3
[NOTE] NC: No connection NU: No use
5.0 Q9818 RN2404 R9818 180
R9827
D9 1SS D9815 Q9815 1SS355 RN1402
Q9814 RN1403
NAPS-7792
4
U6
12V TRIGGER TERMINAL PC BOARD
R9814
Q9812 TLP521-2GB 8 1 2 R9822 1K 7 10K Q9833 RN2404
Q9832 RN1402
P9908A 12V TRIGGER CONTROL LINK IN
P9908B
104J R9815 1K 47K
C9821 R9839
C9804 103J
3 4
6 5
Q9812 TLP521-2GB 5.0
5
E9902 E9903
D9822
P9910
Q980 74HC
4.7/50
AM01Z D9820
DTA-9.4
E F G H
D9816 R9829 R9830 1M C9820 104J 1SS133 C9817 220/6.3
R9841 10K
Q9827 74HC123
1 1A VCC 16 2 1B 1RX/CX 15 3 1CLR 1CX 14 1Q 13 4 1Q 5 2Q 2Q 12 6 2CX 2CLR 11 7 2RX/CX 2B 10 8 GND 2A 9
C9816 390K 10/16 R9816
D9817 1SS355
R9831 47K
R9840 10K 10K Q9831 RN1402 R9835 1M Power Supply Control R9803 2.2k R9832 R9804 4 3 Q9825 7S08 Q9828 2SK3018 Q9802 RN1401 Q9801 2SA965-Y 2.2k
12.0 4.7/50
R9837 10K
Q9826 RN1402
12.0
2200/25
C9805
10K
2 1 Q9803 74HC00
3
6
2 Q9822 TC7W14
1 2
5
JL9906A
To NAPS-7789
(JL9906B)
9901
0
R9821
C9806
47/16
Q9822 TC7W14 8 7 4
R9805
Q9804 78M05 I GO
5.0 10K
Power Supply Warning 470 R9834 (NO USE) 5 4 Q9829 3 7S08 Q9805 TLP421 C9803 R9828 10K 103J
D9805 SEL4110R Q9824 RN1402 Q9819 RN1402
Q9817 TC7W74 1 CK VCC8 2 D PR 7 3 Q CLR 6 4 GND Q 5
1 2
To NAAF-7797
(P701)
1SS355 R9819 C9814
102J
Q9822 TC7W14
3 5 C9818 102J R9833 10K
5.0
D9814
10K
P9909
D9810 1SS355 1SS355
5.0 D9806 1SS355 1SS355 D9808 1SS355 C9810 104J R9807 100K R9806 100K R9808 1M
Q9806 74HC123
1 2 3 4 5 6 7 8 VCC 16 1A 1B 1RX/CX 15 1CLR 1CX 14 1Q 13 1Q 2Q 2Q 12 2CX 2CLR 11 2RX/CX 2B 10 GND 2A 9
Q9803 74HC00 12 13
C9807
104J
11
32 402
Q9807 RN1402
C9808 1/50
Output Relay Control R9812 220 Q9811 2SA950-Y
C9809 R9809 1M 1/50
D9807
R9813 150 (2W)
2.0
5.0 R9810 10K R9820
MOSFET Mute Control R9824 150 (2W) Q9820 2SA950-Y R9826 1.5K R9823 R9825 1.5K 1.5K 220
Q9816 RN2404
Q9808 M51957B
1 2 3 4 NC1 NC3 8 VCC 7 IN NC2 OUT 6 GND C 5 C9812 104J
2.0
5.0 (NO USE) Q9810 RN1404
2.7K
C9819
1SS355
Q9803 74HC00
Q9809 RN1404
C9811 22/35
8
D9809
R9811
Q9821 RN1402
DTA-9.4
A B C D
SCHEMATIC DIAGRAMS-1
POWER AMPLIFIER SECTION
P303 (NO USE)
R327 22 4
P301
R334 120 R336 10K C312 681J
C313 100/50
R337 10K
R339 33K 2 3 R340 33K
BL02RN1-R62
RCA type
R331
R344 0 P608B
R335 100 R342
C314 R338 10K 100/50
Q303
8
1
(1/2W)
1
NJM4565M
Q402 RN2402 UDZ5.6B R408 C401 100K R407 33
100
15.0
R329 22(1/2W) R409 5.6K
22/16 D401
INPUT
P302
4
R301 R305 10K C303 C301 681J R306 10K 47/50 C304 47/50
J301 (NO USE) 220/16 C309
R309 33K 4 R308 10K 2 3 R310 33K
R405 C306 331K 220/16 C311
560 Q401 2SA1162-GR
0.5
R406 33 DC OFFSET ADJUSTMENT R410 200 R411 200 R430 100(B)
C307 331K R325 10K 1
XLR type
1
3
2
120 R302 120 R343 0 R304 R303 100 100
R307 10K
INPUT SEL
RCA 1 3 2 S301 R341
100K
R314 R312 10K 6 R545 22K R547 101K/100V R315 3.9K R330 C526 33K 101K /100V 5 10K 4 Q302 8 7
C315 47/50 R543 C524 22K
Q403 2SA1162-GR
Q404 2SA1162-GR R402 4.7K
R323 10K 2 R544 3 22K R546 R326 3.9K
Q301
1
C404
R403 47K
R404 47K
102J
C405
C308
R328 22 (1/2W)
220/16
2
-15
15
22 (1/2W)
220/16
102J
C302 C305 681J 47/50
8 NJM4565M
BAL
NJM5532M C310
R401 4.7K
Q302
NJM5532M
33K C525 101K /100V
R418
R414 22K
R416 3.3K C412 101K C402 102J Q407 2SC3735-L (Y34) R413 10
R417 C409 104J 3.3K C413 101K C403 102J R412 10 Q408 2SC3735-L (Y34) C411 220/6.3 (PW)
3
Current Protection 0 26.8 UDZ15B UDZ15B D508 D507 R550 100K
26.8 UDZ15B UDZ15B D502 D501 R548 100K
P605 BUSBAR C529 681J/100V EC21QS10 D505
R507 (NO USE)
R540 270K
26.8 R503 560 Q501 2SA1462-L (Y34) 121K R505
L501 NCH-1470 1.5U
EC21QS10
R541 12K
RL502 4 6 5 R514
C522 123J
C531 681J/100V D511
R415 22K
Q405 2SA1462-L (Y34)
Q406 2SA1462-L (Y34)
R419 10
10
C410 220/6.3 (PW)
C408
104J
1 3 2 R531 1K R533 RL501
Q505 FQP22P10
R512 1K 2.2 1SS355 D517 1SS355 Q517 2SC1622A -D18 R559 R558
R554 15 (1W)
Q515 2SA1162-GR
R556 15 (1W)
Q511 FQP22P10
C505 22/63
R510 2.2
R552 (NO USE)
390 470/16 C504
(NO USE)
C502
R511 2.2
R509
C534 334J R519 R518 C506 22/63 Q513 2SC1622A -D18 10 12K 8.2K C509 273J
R516 0.047x 2 (5W+5W)
L505 NCH-1590 13U
R539 C521 153J/250V 27(2W) C519 C520 824J/250V 824J/250V
L506 NCH-1590 13U
R517 0.047x2 (5W+5W)
C535 334J R538 R537 12K 8.2K C518 273J
R506
R502
121K
100/16
C508
R515
R508 (NO USE)
R534 5 4 I G O
EC21QS10
UDZ30B 8
7 UDZ30B
D506
L502 NCH-1470 1.5U
UDZ15B UDZ15B
R551
R549
RL502 NRL-2P2A-DC24-166 R721 680
P606 BUSBAR
-26..8 +7.0
-26.8
C606 0.47/50 Q602 NJM79M15FA I G O
C605 0.47/50 Q601 NJM78M15FA
-7.0
I G O
C608 10/16(PW) Q604 79M07HF
Q716 2SC1622A -D18 10K C611 C612
26.8
R702 22K R703
R602
R601 47 (1W)
47 (1W)
C617 10/50(PW) R611 100(2W)
105J 105J
5
-26.8
BUSBAR P604
P608A
C615 104J (NO USE)
C601 10000/35 L601 NCH-1591 30U +27 P601A
C602 10000/35 L602 NCH-1591 30U -27 P601C
R607 0
HeatSink
E601
C603 C604 105J 105J P601B
From NAPS-7789
UDZ15B
C532 RL501 681J/100V NRL-2P2A-DC24-166
100K
100K
1
Q506 FQP33N10
C530 681J/100V
Q512 FQP33N10
D510 D509
D504 D503
UDZ15B
-26.8
RL502
D515
D516
3
D512
2
EC21QS10
Q502 2SC3735-L (Y34)
R504
560
Q504 2SA1460-L
R513 1K R555 15 (1W) R557 15 (1W)
R532 1K 6
RL501
8
7
10
C515 22/63
4
56
Q514 2SC1622A -D18
1SS355
470/16
C501
C514 22/63
D513
P607A (NO USE)
D518 D514 1SS355
100/16
R501
390 C503
C507
P503 BUSBAR
P504 BUSBAR
Q503 2SC3733-L
R561 R560 22K 6.8K
22K 6.8K
Q518 2SC1622A -D18
56
2.2
DTA-9.4
E F
NOTE
. THE COMPONENTS IDENTFIED BY MARK . . . . .
R318 10K R316 7 6
G
H
.
10K
ARE CRITICAL FOR SAFETY. REPLACE ONLY WITH PART NUMBER SPECIFIED. VOLTAGE(MEASURED WITH VOLTMETER) IS DC VOLTAGE. (NO INPUT SIGNAL) ELECTROLYTIC CAPACITORS ( ) ARE IN uF/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.
Q303
5
J302 (NO USE)
R311 4.7K
NJM4565M
U15
NAAF-7797
R597 (NO USE)
POWER AMPLIFIER PC BOARD
R320 33K 7 6 R319 5 R321 33K 10K R317 10K
R323 10K R544 22K 101K/100V
S301
C316 47/50 R542 22K C523 R322 5
S/E 4 6 BAL
SPEAKER OUTPUT
P651
P502
C586 1SS355 3 D706 4 C585 C587 NC 1 2 L507 NCH-1607 2 1 RL701 NRL-2P5A-DC24-142 4 3 8 7
46
K C525 101K /100V
100K
NJM4565M
NC
104K /250V
Q301
(TA5)
P501
P501A
-15 +15 R595 22 (1/2W)
R596 22 (1/2W) C584 47/16
P607B E501 NO USE
UDD : Yes (with FL core) UJJ : No (only crimp AS)
0 3 )
47/16
DC Output Detector R585 220K 4 2 3 Q580 R586 1M 8 NJM4565M 1 5 6 Q580 7 R588 10K 2 3 R584 220K C581 105J R587 100K R590 4.7K NJM4565M NJM4565M 4 Q581 8 1 D581 1SS355 R594 R592 R589 10K 10K R591 4.7K D580 1SS355 6 5 2.7K C582 474J R593 10K Q581
[NOTE] NC: No connection NU: No use
R581 100K C580 R580 100K
C583
R583 47K 474J R582 47K
3
7
NJM4565M
5.0 R731 10K C614 R708 68K P703 10/16
NAAF-7798
P702
GNDC +5VC ERR FMUTE OUTRL PHTCP GMUTE
R727
270
C703
R717 10K
D703 1SS355
2
1 Q701 74HC14
R709 (NO USE)
D704 1SS355 D707 UDZ5.1B R728 100K
0 R733
100 3
Thermal Protection 5.0
R752 100 100
POSISTOR PC BOARD
R754 330
RL501
10K
74HC14 74HC14 Q701 Q701
(NO USE)
R526
2.2
100/16
C516
C512
121K R520
390
Q509 2SC3733-L
Q507 2SA1462-L (Y34)
560
5 4
5.0
2 Q717 TLP521-2GB 1 2
5 TC7S14F 4 1 3
R522
D751 SEL2110R 5.0 Q753 RN1402
R755
10K
L503 NCH-1470 1.5U
7.0
C706 103
R732
R718 Q751 Q752 TC7W74FU
1 CK VCC 2D PR 3 Q CLR 4 GND Q 8 7 6 5 R751 47K C752 104
P701
GNDC +5VC ERR FMUTE OUTRL PHTCP GMUTE
Q704 TC7W74FU
6 1 CK VCC PR 2D 3 Q CLR 4 GND Q 8 7 6 5
8 7
R529 2.2
R553 C513 (NO USE)
(NO USE)
C510
Q713 RN1402
R528
470/16
R530 2.2
C511
C707 104
C515 22/63
Over Temp. & Over Current Warning
Q754 RN1402
R525
56
121K R521
C517
100/16
10
390
(NO USE)
R724 390
R523
R527
560
Q510 2SA1460-L
Q508 2SC3735-L (Y34)
26.0
R723 390
120 R711
R705 R712
L504 NCH-1470 1.5U
R722 390
C618
C613
10/50
10/16
R608 R603 5.6K 220 (2W)
3.0
120
Q605 2SA1930 R605 120
C701
R612 100 (1/2W)
47/16
1 2
8 7
D708 1SS355
Q706 RN1404
Modulator Operation D710 SEL2910A R719 R706 Q719 RN1404 6.8K
Q708 2SA965-Y 2.2K
Q607 2SC2712-GR D601 UDZS3.6B C609 100/6.3 (PW) C610 100/6.3 (PW)
Modulator Mute
Q711 TLP521-2GB
5.0
R730 C705
100K 104J
R604 5.6K
C607 10/16(PW) I G O Q603 78M07HF
Q608 2SA1162-GR R606 120 5.0 Q707 RN2402 R609 220 (2W)
5.0 Q705 RN2402
330 P704 C708 104 9 R735 8 4.7K R736 Q701 74HC14 FlipFlop Clear R729 1K 100K 13 14 12 7 Q701 74HC14 Q718 RN1402
R707A
R720
R707 56K
22K
56K
D602 UDZS3.6B
D705 R725 SEL2110R
Q715 2SA1162-GR
(1W)
Q702 RN1402
R734
-7.0
Q701 74HC14 10 11
D709
10K
15K
330
RL501
1SS355
R701
(1W)
Q610 78L05 I GO
5.0
(1W)
R726 Q714 RN1402 Q717 TLP521-2GB 6 5 -26.8 Output RL Mute 3 4 100
C616 10/50(PW) R610 100(2W)
Q606 2SC5171
-3.0
DC Output Warning
26.8
Q711 TLP521-2GB
6 5
R713 3 4 100
Power MOSFET Mute
From P701 / To P702 OF ANOTHER CHANNELS' AMP BOARD or NAPS-7793
Q709 2SC2712GR
JL701A
JL701B
R710 04BD222
U16
C514 22/63
R524
1/50
C751
470/16
R753
10K
10/16
56
DTA-9.4
A B C D
PRINTED CIRCUIT BOARD VIEWS-1
U15 POWER AMPLIFIER PC BOARD (NAAF-7797)
1
Component side
1
2
8
3
C531 31
4
C58 C585 85
5
302
L6
01
L505 P601A C C601 C60 C60 L L L601
Q505 R539
P P503
P P608A C602 C602 P601C 60 C
R722 E501
R7 R724
R723 3 2 BLACK C306 C307
DTA-9.4
D
AMPLIFIER TERMAL SENSOR PC BOARD (NAAF-7798)
Component side
Q302 1 Q4 403 Q608 D60 D601 Q405 Q405 05 Q406 Q406 06 06 Q407 7 Q408 Q408 8
D6 D602 602
R725 5 Q706 6
Q718
JL701B 1B
B E BLUE
Q404 Q404 0 0 0 0 Q607 Q607 60
RED RED -B +B
D 08 D708
P601C
P60 A P601A 01A
Q719 719
R734
R754
C 08 C70 C708 0 P601B
Q701 Q70 Q7 Q70 Q70 701
R71 R711 R711 7
NCAF-7798 7798
25137798 798 R710
C
Q401
1 R408 1 D401 Q402 4 402
D704 D704 70 704 0
U16
BLACK LACK L E
P6 P604 1
R732 R732 3 R 07 R707 0 C75 C754 C75 R 53 R753 R753
R717
R733 733 3 33
C706 C706 706 R7 R728 Q705 Q705 D707 70 D709 R729 70 R729 9 9 9 9 Q707 Q713 0 Q713 D703 R 8 D703 R718 Q714
Q751 1 Q75 51
R705 705
R7 R713
R 2 R726 R726 26
R712 2
C752 C752 2
Soldering side
Q3 Q30 Q301 Q301 30
R70 R70 R R R R70 R703 R703 R703
PRINTED CIRCUIT BOARD VIEWS-2
POWER AMPLIFIER PC BOARD (NAAF-7797)
L503 503 3 P6 P606 P606 6 606 P605 605 0 Q580 Q580 80 R587 R58 587 R590 0
L5 5 501 501
L502 502 02
Q716 6
B
L504 R541
R588 R592 92
1
Q515
D D512 D516
D511
D505 5
D D506
R702 R702
R70 R709
Q709 Q709 Q715 R720 D706 D706 7
A
U15
R708
R719
R706 706
1
2
3
4
5
R731 731
D5 D515
R727 27 7
R752 5
DTA-9.4
A B C D
PRINTED CIRCUIT BOARD VIEWS-3
1
U9
POWER SWITCH PC BOARD (NASW-7795)
Component side
C9850 S9801 S9801 P9910 E9903 P9910 P9908A
P9904A
2 U6
12V TRIGGER TERMINAL PC BOARD (NAPS-7792)
Component side
E9902
0
3
NCPS-7792 25137792
U8
DISPLAY LED PC BOARD (NAETC-7794)
Component side
4
POWER
D9812 A K P9907A
NCSW-7795 25137795 0
STAND-BY WARNING
NCETC-7794 25137794
5
D9813
0
DTA-9.4
A B C D
PRINTED CIRCUIT BOARD VIEWS-4
1
U7
CONTROL PC BOARD (NAPS-7793)
Component side
2
NCPS-7793
25137793
1
WER SUPPL WARNING G
Q9812 2
P9907B
RISK FIRE -REPLACE FUSE AS MARKED
F9801A F9801B
3
F9 01 980 1A 1A/125V V
P9904
YEL
AC-H H
AC-G
C9
AC-H H
AC AC-G
C9802
C980 801 T9801
4
T9801
E9901 0
5
R9802 9802
DTA-9.4
A B C D
PRINTED CIRCUIT BOARD VIEWS-5
+12V PROT +12V GND2 RL+ JL9906 L9906B 06B 6B RL-
1
P903B
E102 E1 C C 1 C161 R1 7 R167 R16 R164 64
C163 6
Q163 3
C 62 C162 2
R 71 R171
R170 R170 7
R168
RLGND2 RL+
R166 166 R161 161 R 2 R172 D162 2 R 65 R165
E B R163 R163 PRO PROT
D1 D161 161 E B Q161 R162 2 R169 Q16 Q162 E B B D10 D106
normal prot test c of Q163 +2.5V Dc
P161
PRO PROT TES TEST
Q103 Q103
Q103 Q103 0 Q102 Q102 E
R 9 R109 R115 5 D108 D108
R 8 R108 R11 R 4 R114 D 07 D107
E
Q10 Q101
B
U2 SECONDARY POWER SUPPLY PC BOARD (NAPS-7789) 2
Component side
D105 105 5
R111 C11 118
R 3 R113
R112 2
R 0 R110 C11 117
U3 AC INLET PC BOARD
(NAETC-7801)
Component side
E126
NCETC TC-7801 25137801 01
0
E121
E101
12A/2 250V
F902
C106 L102 E113
BLK
3
C106 C1 6
P9911A P996A AC-H
BLK
L102 C104 04 4
RISK OF FIRE -REPLACE FUSE AS MARKED
L101 C 0 C105
4
D921
U4
E112
L101
C105
THERMAL SENSOR PC BOARD (NAETC-7803)
Component side
251 2513 803 2513780 03
C133 D135 R1 5 R145 R144 R144 D920 Q1 Q136 C C101 D923 D922 R 42 R142 E B Q137 7 E Q135 B E
R1 7 R147 R1 7 107 R106 106 B R14 R1 R148
D133 C134 134 4 R1 R141
TH2+ H2 2+ TH22TH1 1 GND2 D2 CTRL1 RL1 1 +B CTRL2 RL2 2 +B
0 JL L132A
R152 52 R 0 R150 C132 132 B R13 R137 C134 34 D136 13
R151 151 R1 R149
R184
R102
R104 JL132B
5
-B GND +B
R101
R103
F901
NCPS-7789 25137789 1
E122
E124 E125 E123
N
P99 95 P P995
L
AC-G
WHT P997A
P9911B
WHT
-B B
+B
E
E114
E175 7
C104 04 0
E192 E191
P101A
E174
C1 C103 C10 03 E173 E173 D1 4 D134 R146 R146 Q13 Q134 B E REGULATED ULATED L LAT
normal (HT2- B Q161 +0.06V DC), TH1 B Q163 +0.117V DC
P131A 31
Q13 Q138 E
L LOW C CURRENT R140
R138 38 R R139 VO VOLTAGE C CHECK P108
VOLTAGE ADJUST
DTA-9.4
C D
C 7 C927 R RL901
R 21 R921 P903A P903A C910 0 E905 C91 13 C912 2
D9 D931
E906 L103
N NCPS-7788 25 5137788A
P101B G GND
1
RL902
GND2
E904 RLRL+
SEC C
D904 D903 3 R905 E E984 R912 2 R913 L906 6 R915 C9 C922 R914 D905 L9 3 L913 D90 D906 L 2 L912
D1 D104
D103 10 E990 90
C926 6
D102 02
D101 01
E991 99
E988 88 8
E989
E987 RL902 RL9 L RL RL901 C92 921 C9 910 C924 C906 06 C925 25 C907 07 C C912
E902 C901 L901 C903 L9 L905
PRI PRI PRI
C909 9 C911 R919 9 C905 C 9 C909 C9 911
BLK
SEC
AC-H P801A AC-H2 2
BLK
PRINTED CIRCUIT BOARD VIEWS-6
R R920
C9 902
P996B
L905
L901
T901
T902 C917 17
C916
P801B
P997B C C905 AC-G C904 E982
WHT AC-G2
B
T901
T902 T9
C902 PRI DC L LIVE D907 907 E981 E983 R924 R923 E903 3
R901
L9 4 L904 R903 R R904 C918 18 L90 904
C916 9
C917
C923 3 R R911
E986
UDD D
UJJ UJJ UDD D R 6 R916 D902 D D D902 R917 7 UDD U UJJ R918 9 UDD UJJ
E985A
E985B
UJJ JJ
R909
E901
PRI
D94 42
D944
D941
PRIMARY POWER SUPPLY PC BOARD (NAPS-7788)
U1
1
Component side
A
2
3
4
VC+
P902A
VCC-
VC-
5
D943 943 3
L941 1
L941
WHT
-
P904
L906
+
12V INPUT FOR TEST R910
DTA-9.4
THERMAL SENSOR PC BOARD (NAETC-7802)
TERMINAL PC BOARD (NAPS-7791)
Component side
D
Component side
JL805B L8
P1 B P131B
0
R854 85
NCETC-7802 25137802 37802
C
U11
U14
Q80 Q801 P803A Q801 1 C C851 E D865 865 B B C C868 Q87 Q873 E
R87 R872 R87 871
Q817 R 5 R855 Q851 Q851 Q817 7 B
SEC SEC SEC
Q851 Q851 85 Q853 E B R851 R851 E R852 R852 E806 R853 3
+B CTRL1 L1 +B CTRL2 L2 GND2 2 TH1 TH2TH2+ +
25137790A
TH1 PROT
P8 3B P803B
NCPS-7790
D85 D851 Q852 852 E D86 D863 863 86 C865 865 Q 5 Q865 E D864 Q867 Q867 E B Q 8 Q868 B
1
R181 8
C C808 R R821 R R820 Q Q811
Q869 B Q871 E E D866 Q 2 Q872 B C866 T853 E C867 T853 B B B E Q870 Q870 0 B
Q861 C863 B Q863 Q863 3
R87 874 R87 873
P801C
PRI
E B D8 D861 D861 B R882 T852 E E Q 2 Q862 D862 B E Q 4 Q864 T851
D867 67
R8 R8 2 R812 C 05 C80
C809
Q81 Q813 C869 C8 9 D868 8 T T8 T854
R819
R R R811 R811
B B
C801 C801
R807 807 0 07 R806 80 806 06 R8 R810
Q813 3 Q8 Q812 1
C807 C807 7 R818 18 C806
Q875 Q875 E Q Q876 B Q874
E841
Q80 Q807 807 807
Q808 Q806
1 Q812 Q812 8 T854 E
C8 C802
JL805B 05B B R R883
B Q866 C864 C864 4 R893 R893 89 893 D88 D886 D886 8 R892 R892 89 8 892 D884 D884 8 T852
C86 C861 C861
Q804 Q805 Q809
B
E C862 2 L902 T851 1 R R881 D891 D891
D895
PRINTED CIRCUIT BOARD VIEWS-7
Q803 Q802
C811 1
Q8 4 Q814 R884 884 R894 894 1 1 Q814 Q814
R823 R823 2 R82 R 22 R822 R824 R824 24 2 R825 R825 8 5
C870 0 D89 D892 892
R 26 R82
R802 R803 03 3 R827 Q 16 Q816 6 D805 05 5 D803 Q815 R805 05 R804 R801 D804 0
D890
D889 D889 D882
L881 C882 2 D885 D883 C881 1
D89 D894
B
C 4 C814
R815 Q810
C C8 3 C813 B R R849 Q8 5 Q845 84 R 3 R843 E E895 D888 888 8 C 3 C853 C852 C852 Q844 Q844 4 E R845 R8 5 R844 R844 E D845 D845 845
D896 D896
C C882
R816 R817 7 R814 R813
C881
D881 D881 8
Q848 R876
R8 R875
R891
C812 C8 81 O G I D887 88
C8 C848
D801 80
D802 80
D893
L L882
L902
L881 1 L88 882
C9 920 R861 861
R 59 R859
C8 1 C841 C8 C845 D842
D84 D848 48 C891
D847 D847 8
C84 C843
Q884 Q88
Q883
Q882 Q88 881
B
Q Q843 G
C 46 C846 D844 D844 R846 R846 R84 R847 8 847 C847 7 S R862 62
E
D841 841 1 C842 84
D843 D843
Q841
R848 848
C8 C892
E892
E891
POWER SUPPLY CONTROL PC BOARD (NAPS-7790)
Q842 B B B B E
R84 R841 41
1
2
U5
3
Component side
A
E893 3
E894 E89
R895
P902 P90 P902B
R842
4
E881
B
5
L903
L903
C80 C804 R 8 R808
C80 C80 C803 8 R8 R80 R809
0 NCPS-7791
25137791
AC-H2 AC H2
AC-G2
P P801C C
U3
E601
P601C BLUE -B
P704
TEMPERATURE OR CURRENT MODULATOR OPERATION DC OUTPUT
P601A RED
+B
To NAPS-7789
WARNING INDICATOR
P9911B
P9911A
U15
XLR
P302
WHT
D9805
POWER SUPPLY WARNING
R430 OFFSET
BLK
N
P607A
AC-G
WHT
BLK
AC-H
P601B
NAAF-7797
U7
P995
S301 P301
+B -B E
P608B
P996A P997A
L
INPUT SELECT
AC INLET
P9908B P9909
NAETC-7801
NAPS-7793
POWER AMPLIFIR PC BOARD
AC INLET PC BOARD
SURROUND BACK LEFT
NAAF-7797
P9904A
PC BOARD CONNECTION DIAGRAM
POWER AMPLIFIR PC BOARD
12V TRIGGER TERMINAL PC BOARD
NAAF-7797
INPUT SELECT
P9907A
SURR BACK LEFT SURR LEFT LEFT CENTER RIGHT SURR RIGHT SURR BACK RIGHT
LEFT CENTER RIGHT SURR RIGHT SURR BACK RIGHT
P601B
P601B
POWER
INPUT SELECT
SURR BACK LEFT SURR LEFT LEFT CENTER RIGHT SURR RIGHT SURR BACK RIGHT
P601B
CONTROL PC BOARD
P9907B
P702
F901
P608A
GNDC +5VC ERR FMUTE OUTRL PHTCP GMUTE
F9801
RCA
P303
P607B
YEL
P701
RL502
P9911C Q506 Q512 Q505 Q511
RL501
WHITE P501
AC-H
AC-G
RL701
BRN JL9906A
P703 JL701A
T9801
P502 BLACK
E501
OUTPUT
P9904
U6
JL701B
R710
U16
E9902
12V TRIGGER IN
P9908A
NAAF-7798
P704
TEMPERATURE OR CURRENT MODULATOR OPERATION
HEAT SINK
E601
P9910
DC OUTPUT
P601A RED
P601C BLUE
U15
E9903
+B
WARNING INDICATOR
-B
P607A
XLR
R430 OFFSET
P302
NAPS-7792
To NAAF-7797
P702
+B -B E
S301
P608B
P301
RCA
P608A
GNDC +5VC ERR FMUTE OUTRL PHTCP GMUTE
P303
SURROUND LEFT
S9801
P607B
P701
RL502
WHITE P501
Q506 P703
Q505
Q511
Q512
RL501
U9
RL701
E501
P502
OUTPUT
JL701A
BLACK
JL701B
E
U16
NASW-7795 To NAAF-7797
SURR BACK LEFT SURR LEFT
NAAF-7798
P704 P601A RED
TEMPERATURE OR CURRENT MODULATOR OPERATION DC OUTPUT
R710
HEAT SINK
E601
POWER SWITCH PC BOARD
+B
WARNING INDICATOR
P601C -B BLUE
U15
XLR
R430 OFFSET
P302
To NAAF-7797
+B -B E
P702
P607A
S301
STAND-BY WARNING
P608B
P301
RCA
P608A
GNDC +5VC ERR FMUTE OUTRL PHTCP GMUTE
A
K
LEFT
POWER AMPLIFIR PC BOARD
D9813
POWER
D9812
P303
P607B
P701
RL502
WHITE P501
Q506
Q505
Q511
Q512
RL501
RL701
P502
P703
OUTPUT
+B
BLACK
E501
JL701A
U8
-B
P704
JL701B
U16
NAAF-7798
R710
HEAT SINK
P601A RED
TEMPERATURE OR CURRENT MODULATOR OPERATION DC OUTPUT
E601
P601C BLUE -B
+B
WARNING INDICATOR
NAETC-7794
U15
DISPLAY LED PC BOARD
XLR
R430 OFFSET
P302
DTA-9.4
+B -B E
P702
P607A
NAAF-7797
POWER AMPLIF
INPUT SELECT
S301
CENTE
P608B
P301
RC
DTA-9.4
NTER
RCA
OUTPUT XLR
RIGHT
INPUT SELECT RCA
SURROUND RIGHT
OUTPUT OUTPUT XLR INPUT SELECT RCA
SURROUND BACK RIGHT
OUTPUT XLR INPUT SELECT RCA
T
P301
P301
S301
P301
P607B
S301
P301
BLACK
WHITE P501
P607B
S301
WHITE P501
BLACK
WHITE
BLACK
WHITE P501
P502
P502
P303
P302
P303
P608B
P501
P303
P608B
P302
P302
P303
P608B
P608B
BLACK
E501
P607B
P607B
P502
E501
E501
E501
R430 OFFSET
R430 OFFSET
R430 OFFSET
RL701
HEAT SINK
HEAT SINK
HEAT SINK
RL501
RL501
U15
RL501
Q512
POWER AMPLIFIR PC BOARD
Q511
P601C BLUE -B
E601
Q512
MPLIFIR PC BOARD
Q512
POWER AMPLIFIR PC BOARD
P601C
POWER AMPLIFIR PC BOARD
Q511 P601C BLUE -B
E601
Q511
P608A
U16
R710
E601
P607A
U16
R710
Q511
BLUE
-B
Q512
NAAF-7797
NAAF-7797
NAAF-7797
RL501
U15
U15
U16
R710
U16
P607A
P608A
P608A
P607A
P608A
Q505
P601A RED
NAAF-7798
Q505
Q505
P601A RED
JL701B
Q505
+B
+B
NAAF-7798
NAAF-7798
RL502
RL502
RL502
JL701A
JL701A
JL701A
RL502
JL701A
P704
P704
GNDC +5VC ERR FMUTE OUTRL PHTCP GMUTE
GNDC +5VC ERR FMUTE OUTRL PHTCP GMUTE
P704
GNDC +5VC ERR FMUTE OUTRL PHTCP GMUTE
P702
GNDC +5VC ERR FMUTE OUTRL PHTCP GMUTE
P702
P701
P703
P702
P701
P702
P701
P703
P703
P701
P703
+B -B E
+B -B E
E122
E121
PROT TEST
TH2+ TH2TH1 GND2 CTRL1 +B CTRL2 +B
P161
+B E
E126 E124 E125 E123
E114
VOLTAGE ADJUST
E112 D133
E102
P131A
REGULATED
R139
LOW CURRENT
D161
P108
E101
GND2 +12V PROT +12V RLRL+
E175 P101A
PROT
JL9906B
U2
RLGND2 RL+
NAPS-7789
E113
P903B
SECONDARY POWER SUPPLY E192 PC BOARD U4 NAETC-7802
TEMPERATRE SENSOR PC BOARD
R184
L102
L101
E191
D921
D920
D923
D922
JL132A
P131B
L103
P903A
RLGND2 RL+ RL902 E904
E905
E906
D104
P101B GND
D103
E990 E988
D102
SEC
JL132B
Q103
D136
-B
E174
E173
-B GND +B
VOLTAGE CHECK
D101
E991 E989 E987
+B -B E
RL902
RL901
U14
E902
SEC
PRI
AC-H
NAPS-7791
E984
BLK
P996B
P801B
P997B
AC-G
AC-G2
WHT
WHT
E982
E986 PRI DC LIVE
D907
UJJ UDD UJJ UDD UJJ
UDD
E985A
E985B
UJJ
E901
PRI
E983
D902
U11
JL805B
E894 E893
R854
NAETC-7802
TEMPERATRE SENSOR PC BOARD
VCVCVC+
E903
E981
UDD
P902A
-
P904
PRIMARY POWER SUPPLY PC BOARD
L906
+
12V INPUT FOR TEST
BLK P801A AC-H2
U1
NAPS-7788
T901
T902
TERMINAL PC BOARD
P803B
[NOTES]
SOCKET ASSY
P902B
Q842
U5
SWITCHING CONTROL PC BOARD
JL805B
E841
P801C
AC-G2
AC-H2
Q801 Q817
SEC
PRI
R181
P803A
T854
E895
NAPS-7790
T853 T852 T851
JUMPER WIRE
BORAD TO BOARD
NAAF-7798
JL701B
P601A RED
+B
JL701B
Q506
WARNING INDICATOR
WARNING INDICATOR
MODULATOR OPERATION
Q506
TEMPERATURE OR CURRENT
TEMPERATURE OR CURRENT
TEMPERATURE OR CURRENT
WARNING INDICATOR
Q506
MODULATOR OPERATION
MODULATOR OPERATION
Q506
JL701B
DC OUTPUT
DC OUTPUT
DC OUTPUT
R710
HEAT SINK
RL701
RL701
P502
P601B
P601B
Q884
Q883
E806
Q851
Q882
TH1 PROT
D851
Q881
P601B
RL701
E881
E891
E892
R848 R861
+B CTRL1 +B CTRL2 GND2 TH1 TH2TH2+
DTA-9.4 OPERATION CHECK-1
CURRENT DETECTION OF POWER SUPPLY
Notes
No load and No signal input. P161
How to check?
1. Connect the power supply card to a wall outlet. 2. Power On the unit. 3. Short-circuit the both ends of P161 on NAPS-7789. 4. Check that it is as follows.
P161
E122 PROT TEST E121
PROT TEST
D133
E
E102
E112
E173
TH2+ TH2TH1 GND2 CTRL1 +B CTRL2 +B
E114
VOLTAGE ADJUST
P131A
REGULATED
R139
D161
E126 Q103
E124
E125
E123
-B
E175
E174
LOW CURRENT
E101
GND2 +12V PROT +12V RLRL+
D136
PROT
P101A
JL9906B
RLGND2 RL+
L102
U2
P903B
NAPS-7789
E113
L101
E191
E192
D921
D920
D923
D922
Lights
Standby Power
Blinks
RELAYS AND INDICATORS
How to check?
2. Connect the power supply card to a wall outlet. 4. Power On the unit. 5. Immediately after power switch On.
OUTPUT XLR INPUT SELECT RCA
Check
S301 P301 P607B P302
E501
Blinks
Standby Power
R430 OFFSET
P303
P502
P608B
BLACK
WHITE P501
RL701 RL501
Check
RL501 and RL502 Relays ON. 5. About 10 seconds after turning On a power supply.
E601 P608A
P607A P601B
P503
DC OUTPUT
Check
RL701 Relays ON.
P601A RED
WARNING INDICATOR
TEMPERATURE MODULATOR OR OPERATION CURRENT
RL502
Q506
05 L5
Q505
+B
Q511
P601C BLUE -B P504
Q512
4. About 1 second after turning On a power supply.
NAAF-7797
RL501
U15
Check Lights
Standby Power
JL701A
RL502
P704
P702
GNDC +5VC ERR FMUTE OUTRL PHTCP GMUTE
P701
P703
Blinks stop
JL132B
-B GND +B
VOLTAGE CHECK
+B
P108
RL701
Q603
Q717 Q711
Q604
DTA-9.4 OPERATION CHECK-2
DC VOLTAGE DETECTION OF POWER AMPLIFIER CIRCUIT
Notes
No load and No signal input.
How to check?
1. Connect the power supply card to a wall outlet. 2. Power On the unit. 3. Set the INPUT SELECT switch of a rear panel to the RCA side. 4. Apply DC+3V to a RCA terminal. 5. Check that the speaker relay RL701 is turned off. 6. Apply DC+3V to a RCA terminal. 7. Check that the speaker relay RL701 is turned off.
Rear panel
DC+3V or -3V
OVER CURRENT DETECTION OF POWER AMPLIFIER CIRCUIT
Notes 1. Check only one channel at a time. 2. Interrupt a input signal, immediately after a speaker relay goes out. 3. Don't change into the state where load was connected to amplifier, more than for 3 seconds. How to check?
1. Set the output of the oscillator into the minimum level. 2. Connect the oscilloscope to the OUTPUT terminal. 3. Output a 200Hz rectangular wave from an oscillator, and input into a RCA terminal through the appointed differentiation circuit. 4. Turn on the unit. 5. Adjust the output level of oscillator so that the level of the waveform of the OUTPUT terminal become 35 Vp-p. 6. Connect 2-ohms load to the OUTPUT terminal. 7. Check that the speaker relay RL701 is not turned off . 8. Connect 0.3-ohm load to the OUTPUT terminal. 9. Check that the speaker relay RL701 is turned off immediately.
Differentiation circuit.
35Vp-p
200Hz
3.3k 0.1 F 1SS133 3.3k 10k
Input
Output
0.01 F
GND
GND
DTA-9.4 OPERATION CHECK-3
THERMAL DETECTION OF POWER AMPLIFIER CIRCUIT
Notes
No load and No signal input.
How to check?
1. Connect the power supply card to a wall outlet. 2. Power On the unit. 3. Short-circuit the both ends of P703 on NAAF-7797. 4. Check that it is as follows.
R430 OFFSET
U15
NAAF-7797
POWER AMPLIFIER PC BOARD
Check
P601C BLUE -B
D751
E601
P607A P601B
TEMPERATURE OR CURRENT
P601A RED
+B
P703
WARNING INDICATOR
P704
TEMPERATURE OR CURRENT
Q603
Q717
Q711
Q604
Light
MODULATOR OPERATION
DC OUTPUT
P702
P703
Short
DTA-9.4 OPERATION CHECK-4
OPERATION INDICATOR IN THE UNIT-1
(RED)
D705
DC OUTPUT
D705 (DC OUTPUT) This LEDTurned on when DC voltage is detected between speaker output terminals. Spealer output relay is turned off while having detected DC voltage. The relay will return automatically, if DC voltage output is lost. U15 NAAF-7797
OUTPUT XLR INPUT SELECT RCA
R430 OFFSET
(ORANGE)
DC OUTPUT
P601A RED
WARNING INDICATOR
TEMPERATURE MODULATOR OR OPERATION CURRENT
RL502
Q506
05 L5
Q505
+B
P704
(RED)
D751
TEMPERATURE OR CURRENT
D751 (TEMPERATURE OR CURRENT) This LED is turned on when an unusual temperature rise and unusual over-current of an amplifier circuit are detected.
U7 NAPS-7793
P9908B P9909 JL9906A
(RED)
D9805
D9805 POWER SUPPLY WARNING
POWER SUPPLY WARNING
D9805(POWER SUPPLY WARNING) This LED is turned on when abnormalities arise in the power supply circuit.
Q9803
Q9806
Q9827
P9911C
1A/125V
F9801
YEL
AC-H
AC-G
BRN
T9801
P9904
P601B
D710 (MODULATOR) This LED shows the state of operation of an modulation circuit. Immediately after a power supply injection, the light is switched on, and this LED will put out the light, if operation of modulation circuit is started.
E601
P607A
Q511
P601C BLUE -B
Q512
MODULATOR OPERATION
RL501
D710
JL701A
P702
P701
P703
E501
RL701
P9907B
DTA-9.4 OPERATION CHECK-5
OPERATION INDICATOR IN THE UNIT-2
(RED)
D133 (REGULATED) D133 This LED is turned on when the voltage of a secondary power supply output is normal. The detection circuit which is source of the drive about this LED is supervising only REGULATED the voltage difference between the positive power supply of secondary voltage, and the negative power supply.
TH2+ TH2TH1 GND2 CTRL1 +B CTRL2 +B
U2 NAPS-7789
E114
VOLTAGE ADJUST E122 PROT TEST E121
D133
E
E102
E112
E173
P131A
REGULATED
R139
D161
E126 Q103
E124
E125
E123
-B
E175
E174
LOW CURRENT
E101
GND2 +12V PROT +12V RLRL+
D136
PROT
P101A
JL9906B
RLGND2 RL+
L102
L101
E191
P903B
E113 E192
D921
D920
D923
D922
(RED)
D136
LOW CURRENT
D136 (LOW CURRENT) This LED is turned on when a low load measure circuit operates. When the switching power supply of this unit has very little load to a powe