Onkyo HTP-520 User manual

HTP-520/SKS-HT520
SERVICE MANUAL
SERVICE MANUAL
6.1-CH HOME THEATER SPEAKER PACKAGE
Black and Silver models
MODEL HTP-520(B)/(S)
MODEL SKS-HT520(B)/(S)
Ref. No. 3812
042004
120V AC, 60Hz
120V AC, 60Hz
BMDD
BMDC
120V AC, 60Hz
120V AC, 60Hz
SMDD
SMDC
- - - - - - - - - - Front Speakers (L / R) - - - - - - - - - -
"SKF-520F"
- - - Center Speaker - - -
"SKC-520C"
- - - - - Surround Speakers (L / R) - - - - -
"SKM-520S"
- Surround Back Speaker -
"SKB-520"
- - Powered Subwoofer - -
"SKW-520"
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.

SPECIFICATIONS
HTP-520/SKS-HT520
Type :
Input sensitivity/impedance :
Maximum output power :
Frequency response :
Cabinet capacity :
Dimensions (W x H x D) :
Weight :
Driver unit :
Power supply :
Power consumption :
Other :
Bass-reflex
330 mV / 100 kohm
220 W (Dynamic Power)
25 Hz - 150 Hz
1.35 cubic feet (38.5 L)
10-13/16" x 20-3/8" x 16-3/16"
(275 x 518 x 411 mm)
30 lbs. (13.6 kg)
10 inch Cone Woofer
AC 120 V, 60 Hz
128 W
Auto Standby function
Front Speaker (SKF-520F)
Type :
Impedance :
Maximum input power :
Output sound pressure level :
Frequency response :
Crossover frequency :
Cabinet capacity :
Dimensions (W x H x D) :
Weight :
Drivers unit :
Terminal :
Other :
2 Way Bass-reflex
8 ohm
130 W
87 dB/W/m
55 Hz - 50 kHz
4.5 kHz
0.38 cubic feet (10.8 L)
7-7/16" x 16-1/2" x 9-5/16"
(189 x 419 x 236 mm)
12.1 lbs. (5.5 kg)
5-1/4 inch OMF Cone woofer
x 2
1 inch Balanced Dome
tweeter
Color-coded push type
Magnetic shielding
Type :
Impedance :
Maximum input power :
Output sound pressure level :
Frequency response :
Crossover frequency :
Cabinet capacity :
Dimensions (W x H x D) :
Weight :
Drivers unit :
Terminal :
Other :
2 Way Bass-reflex
8 ohm
130 W
85 dB/W/m
60 Hz - 50 kHz
4.5 kHz
0.27 cubic feet (7.7 L)
15-1/4" x 6-3/16" x 7-15/16"
(387 x 157 x 202 mm)
8.2 lbs. (3.7 kg)
4 inch OMF Cone Woofer
x 2
1 inch Balanced Dome
tweeter
Color-coded push type
Magnetic shielding
Surround Speaker (SKM-520S/SKB-520)
Type :
Impedance :
Maximum input power :
Output sound pressure level :
Frequency response :
Crossover frequency :
Cabinet capacity :
Dimensions (W x H x D) :
Weight :
Drivers unit :
Terminal :
Other :
2 Way Bass-reflex
8 ohm
130 W
82 dB/W/m
60 Hz - 50 kHz
5 kHz
0.09 cubic feet (2.7 L)
6-7/8" x 10-7/16" x 4-15/16"
(175 x 265 x 125 mm)
3.7 lbs. (1.7 kg)
4 inch Cone Woofer
1 inch Balanced Dome
tweeter
Color-coded push type
Magnetic shielding
Specifications and appearance are subject to change
without prior notice.
Powered Subwoofer (SKW-520) Center Speaker (SKC-520C)

HTP-520/SKS-HT520
HTP-520/SKS-HT520
EXPLODED VIEWS-1
SKW-520 : POWERED SUBWOOFER
SP06
x10pcs.
A05
x8pcs.
SP07
x4pcs.
A08
x2pcs.
A07
A10
x4pcs.
A05
x3pcs.
A10
x2pcs.
A06
x2pcs.
A13
A10
A15
A102
A101
A103
P902
SP11
x2pcs.
A11
A01
U05
A03
U03
U01
U02
Q515
Q951
Q952
Q541
Q516
U04
F901
T901
A02
A04
A16
x2pcs.
A03
A02
Refer to "EXPLODED VIEWS-2"

HTP-520/SKS-HT520
HTP-520/SKS-HT520
EXPLODED VIEWS-2
SKW-520 : POWERED SUBWOOFER
SP06
x 6 pcs.
SP08
SP04
SP01a / SP01b
SP03a / SP03b
SP05
x 8 pcs.
SP02
x 4 pcs.
SP09

HTP-520/SKS-HT520
HTP-520/SKS-HT520
EXPLODED VIEWS-3
SKF-520F <L> / SKF-520F <R>
SP29a / SP29b
SP28
SP31a / SP31b
SP21a / SP21b / SP21c / SP21d
with Catching Holder (SP22)
SP23
SP33a / SP33b
SP24
SP23
SP22
x 4 pcs.
SP26
x 6 pcs.
SP26
x 6 pcs.
SP27
x 4 pcs.
Lch
TERMINAL :
White / Black
Rch
TERMINAL :
Red / Black

HTP-520/SKS-HT520
HTP-520/SKS-HT520
EXPLODED VIEWS-4
SKC-520C
SP51
SP41a / SP41b
with Catching Holder (SP42)
SP49
SP43
SP53a / SP53b
SP48
SP44
SP43
SP42
x 4 pcs.
SP46
x 4 pcs.
SP46
x 4 pcs.
SP47
x 4 pcs.
TERMINAL :
Green / Black

HTP-520/SKS-HT520
HTP-520/SKS-HT520
EXPLODED VIEWS-5
SKM-520S <L> / SKM-520S <R> / SKB-520
SP62 SP64
SP61a / SP61b SP63a / SP63b SP65a / SP65b
SP66
"SKB-520""SKM-520S <R>""SKM-520S <L>"
TERMINAL :
Blue / Black
TERMINAL :
Gray / Black
TERMINAL :
Brown / Black

SCHEMATIC DIAGRAM
SKW-520 :
POWERED
SUBWOOFER
HTP-520/SKS-HT520HTP-520/SKS-HT520
A
1
2
3
4
5
BCDEFGH
P301A
P301B
P102A
Q601
NJM4558LD
3
+B
8
2
1
Q302
NJM4558LD
3
+B
8
2
1
Q301
NJM4558LD
3
+B
8
2
1
Q601
NJM4558LD
3
2
-B
4
1
Q301
NJM4558LD
5
6
-B
4
7
Q302
NJM4558LD
5
6
-B
4
7
JL535A
BLACK
JL536A
RED
J901B
RED
RED
BLK
F901
5A/125V
P902
R104
20K
R544
100
P631
P531
P902A
P633
Q606
KRA103M
OR DTA124ES
P632A
JL601 OR JL601A
P901A
JL601 OR JL601B
Q605
2SA933S-S/R
OR KTA1267-GR
Q505
KTA1024-Y
OR 2SA949-Y/O
Q519
2SA965-Y
Q517
2SA933S-S/R
OR KTA1267-GR
Q507
KTA1024-Y
OR 2SA949-Y/O
Q604
2SA933S-S/R
OR KTA1267-GR
Q607
2SA933S-S/R
OR KTA1267-GR
Q514
KTB1369-Y
OR 2SA1930
Q516
2SA1987-R/O
Q509
KTA1024-Y
OR 2SA949-Y/O
Q952
KTA1046-Y/GR
OR 2SB941-P
Q602
KRC103
OR DTC124ES
D901
RS404L
D902
RL1N4003
OR GP104003E
D903
RL1N4003
OR GP104003E
D605
1SS133
OR 1SS270A
D604
1SS133
OR 1SS270A
D603
1SS133
OR 1SS270A
D606
1SS133
OR 1SS270A
D651
1SS133
OR 1SS270A
D602
MTZJ2.7B
D601
MTZJ2.7B
D904
MTZJ5.6B
D952
MTZJ15C
D951
MTZJ15C
Q541
2SC3423-Y/O
Q513
KTD2061-Y
OR 2SC5171
Q518
2SC2235-Y
Q506
KTC3206-Y
OR 2SC2229-Y/O
Q609
2SC1740S-S/R
OR KTC3199-GR
Q608
2SC1740S-S/R
OR KTC-3199-GR
Q603
2SC1740S-S/R
OR KTC3199-GR
Q504
2SC2240-BL
Q503
2SC2240-BL
Q502
KTC3200-BL
OR 2SC1775A-F/E
Q501
KTC3200-BL
OR 2SC1775A-F/E
Q515
2SC5359-R/O
Q510
KTC3206-Y
OR 2SC2229-Y/O
Q951
KTC2026-Y/GR
OR 2SD1266-P
P101
C604
33/35
C517
10/50
C905 5600/63
C906
5600/63
C601
10/50
C603
470/16
C602
10/50
C909 22/50
C527
220/16
C528
10/50
C504
220/16
C501
0.47/50
C526
10/50
C954
220/16
C953
220/16
C303
47/50 C308
47/50
C301
47/50
C952
220/16
C951
220/16
C520
224
C519
224
C955
223J
C904
104/100 C903
104/100
C901
472M
C950
104/50
C514
NC
C502
151
C506
070
C503
151
C505
020
C307
104
C306
104
C304
104
C305
104
C934
104
C933
104
C302
101
R620
100K
R619
22K
R621
1K
R614
120K R613
470K
R514
82 (1/4W)
R512
68 (1/4W)
R511
82 (1/4W)
R101
NC
R301
1K
R533
3.3 {1W}
R534
100
R625
180K
R624
100K
R701
PTFL04BC222Q2N34BO
R601
5.6K
R610
560K
R608
22
R607
22
R602
100K
R603
150K
R604
180
R605
10K
R606
10K
R609
39K
R628
330K
R629
22K
R902
820 {1W}
R901
820 {1W}
R904
1K (1/2W)
R622
10K
R623
100K
R627
680K
R626
2.2M
R903 10K
R617
1K
R616
100K
R612
39K
R615
22K
R611
820K
R651
12K {1/2W}
R510
100K
R528
390 (1/2W)
R531(1/2)
0.22 {5W}
R531(1/2)
0.22 {5W}
R501
1K
R522
220
R504
270
R503
5.6K R521
220
R506
1K (1/4W)
R505
1K (1/4W)
R502
47K
R517
3.3K
R509
1K
R507
33K
R515
12K
R516
12K
R526
150 (1/2W)
R541
820
R543
100
R542
150
R527
270
R513
82 (1/4W)
R508
47 (1/4W)
R306
4.7K
R972
47K
R971
10K
R307
100K
R308
47K
R311
5.6K
R312
5.6K
R309
NC
R310/J385
JUMPER
R315
100K
R316
1K
R314
5.6K
R313
5.6K
R305
33K
18K
R304
R303
100K
R302
1M
R954
6.8K {1/2W)
R953
6.8K {1/2W}
R952
82 {1/4W}
R951
82 {1/4W}
15.0V
-15.0V
-14.4V
-50.0V
14.4V
50.0V
0V
49.8V
50.3V
0V
0.6V
-1.0V
1.0V
51.0V
1.6V
-1.6V
-51.0V
0V
5.6V
0V
5.0V
3.9V
0.1V
5.6V
0V
5.5V
5.6V
5.4V
0.3V
0.2V
0V
4 OHM
Sub Woofer W2301B
SPEAKER
NAAF-8275
T901
NAETC-8276
TF
INPUT
NAETC8312
AC 120V / 60HZ
NAPS-8277
AC-H
AC-G
NC
AMPLIFIER PC BOARDU01
INPUT TERMINAL
PC BOARD
U02
POWER TRANSFORMER
PC BOARD
U03
THERMAL SENSOR PC BOARD
U04
E LENT. POUR UNE PROTECTION PERMANENTE,N'UTILISER
CE SYMBOLE INDIQUE QUE LE FUSIBLE UTLISE EST
INDIQUE LA QU LE PRESENT SYMBOL EST APPOSE.
QUE DES FUSIBLES DE MEME TYPE. CE DARNIER EST
RATING REFER TO THE MARKING ADJACENT TO THE SYMBOL
FOR CONTINUED PROTECTION AGAINST FIRE
HAZARD,REPLACE WITH SAME TYPE FUSE. FOR FUSE
THIS SYMBOL LOCATED NEAR THE FUSE INDICATES
THAT THE FUSE USED IS SLOW OPERATING TYPE
ATTENTION
VA
ET CALIBRATION COMME INDIQUE.
D'INCENDIE, REMPLACER UNIQUEMENT
PERMANENTE CONTRE LES RISQUES
AFIN D'ASSURER UNE PROTECTION
PAR UN FUSIBLE DE MEME TYPE
AGAINST FIRE HAZARD, REPLACE
VA
FOR CONTINUED PROTECTION
AND RATING INDICATED.
ONLY WITH FUSE OF SAME TYPE
CAUTION
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 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.
!
NOTE

SCHEMATIC DIAGRAM
SKW-520 :
POWERED
SUBWOOFER
HTP-520/SKS-HT520HTP-520/SKS-HT520
A
1
2
3
4
5
BCDEFGH
P301A
P301B
P102A
Q601
NJM4558LD
3
+B
8
2
1
Q302
NJM4558LD
3
+B
8
2
1
Q301
NJM4558LD
3
+B
8
2
1
Q601
NJM4558LD
3
2
-B
4
1
Q301
NJM4558LD
5
6
-B
4
7
Q302
NJM4558LD
5
6
-B
4
7
JL535A
BLACK
JL536A
RED
J901B
RED
RED
BLK
F901
5A/125V
P902
R104
20K
R544
100
P631
P531
P902A
P633
Q606
KRA103M
OR DTA124ES
P632A
JL601 OR JL601A
P901A
JL601 OR JL601B
Q605
2SA933S-S/R
OR KTA1267-GR
Q505
KTA1024-Y
OR 2SA949-Y/O
Q519
2SA965-Y
Q517
2SA933S-S/R
OR KTA1267-GR
Q507
KTA1024-Y
OR 2SA949-Y/O
Q604
2SA933S-S/R
OR KTA1267-GR
Q607
2SA933S-S/R
OR KTA1267-GR
Q514
KTB1369-Y
OR 2SA1930
Q516
2SA1987-R/O
Q509
KTA1024-Y
OR 2SA949-Y/O
Q952
KTA1046-Y/GR
OR 2SB941-P
Q602
KRC103
OR DTC124ES
D901
RS404L
D902
RL1N4003
OR GP104003E
D903
RL1N4003
OR GP104003E
D605
1SS133
OR 1SS270A
D604
1SS133
OR 1SS270A
D603
1SS133
OR 1SS270A
D606
1SS133
OR 1SS270A
D651
1SS133
OR 1SS270A
D602
MTZJ2.7B
D601
MTZJ2.7B
D904
MTZJ5.6B
D952
MTZJ15C
D951
MTZJ15C
Q541
2SC3423-Y/O
Q513
KTD2061-Y
OR 2SC5171
Q518
2SC2235-Y
Q506
KTC3206-Y
OR 2SC2229-Y/O
Q609
2SC1740S-S/R
OR KTC3199-GR
Q608
2SC1740S-S/R
OR KTC-3199-GR
Q603
2SC1740S-S/R
OR KTC3199-GR
Q504
2SC2240-BL
Q503
2SC2240-BL
Q502
KTC3200-BL
OR 2SC1775A-F/E
Q501
KTC3200-BL
OR 2SC1775A-F/E
Q515
2SC5359-R/O
Q510
KTC3206-Y
OR 2SC2229-Y/O
Q951
KTC2026-Y/GR
OR 2SD1266-P
P101
C604
33/35
C517
10/50
C905 5600/63
C906
5600/63
C601
10/50
C603
470/16
C602
10/50
C909 22/50
C527
220/16
C528
10/50
C504
220/16
C501
0.47/50
C526
10/50
C954
220/16
C953
220/16
C303
47/50 C308
47/50
C301
47/50
C952
220/16
C951
220/16
C520
224
C519
224
C955
223J
C904
104/100 C903
104/100
C901
472M
C950
104/50
C514
NC
C502
151
C506
070
C503
151
C505
020
C307
104
C306
104
C304
104
C305
104
C934
104
C933
104
C302
101
R620
100K
R619
22K
R621
1K
R614
120K R613
470K
R514
82 (1/4W)
R512
68 (1/4W)
R511
82 (1/4W)
R101
NC
R301
1K
R533
3.3 {1W}
R534
100
R625
180K
R624
100K
R701
PTFL04BC222Q2N34BO
R601
5.6K
R610
560K
R608
22
R607
22
R602
100K
R603
150K
R604
180
R605
10K
R606
10K
R609
39K
R628
330K
R629
22K
R902
820 {1W}
R901
820 {1W}
R904
1K (1/2W)
R622
10K
R623
100K
R627
680K
R626
2.2M
R903 10K
R617
1K
R616
100K
R612
39K
R615
22K
R611
820K
R651
12K {1/2W}
R510
100K
R528
390 (1/2W)
R531(1/2)
0.22 {5W}
R531(1/2)
0.22 {5W}
R501
1K
R522
220
R504
270
R503
5.6K R521
220
R506
1K (1/4W)
R505
1K (1/4W)
R502
47K
R517
3.3K
R509
1K
R507
33K
R515
12K
R516
12K
R526
150 (1/2W)
R541
820
R543
100
R542
150
R527
270
R513
82 (1/4W)
R508
47 (1/4W)
R306
4.7K
R972
47K
R971
10K
R307
100K
R308
47K
R311
5.6K
R312
5.6K
R309
NC
R310/J385
JUMPER
R315
100K
R316
1K
R314
5.6K
R313
5.6K
R305
33K
18K
R304
R303
100K
R302
1M
R954
6.8K {1/2W)
R953
6.8K {1/2W}
R952
82 {1/4W}
R951
82 {1/4W}
15.0V
-15.0V
-14.4V
-50.0V
14.4V
50.0V
0V
49.8V
50.3V
0V
0.6V
-1.0V
1.0V
51.0V
1.6V
-1.6V
-51.0V
0V
5.6V
0V
5.0V
3.9V
0.1V
5.6V
0V
5.5V
5.6V
5.4V
0.3V
0.2V
0V
4 OHM
Sub Woofer W2301B
SPEAKER
NAAF-8275
T901
NAETC-8276
TF
INPUT
NAETC8312
AC 120V / 60HZ
NAPS-8277
AC-H
AC-G
NC
AMPLIFIER PC BOARDU01
INPUT TERMINAL
PC BOARD
U02
POWER TRANSFORMER
PC BOARD
U03
THERMAL SENSOR PC BOARD
U04
E LENT. POUR UNE PROTECTION PERMANENTE,N'UTILISER
CE SYMBOLE INDIQUE QUE LE FUSIBLE UTLISE EST
INDIQUE LA QU LE PRESENT SYMBOL EST APPOSE.
QUE DES FUSIBLES DE MEME TYPE. CE DARNIER EST
RATING REFER TO THE MARKING ADJACENT TO THE SYMBOL
FOR CONTINUED PROTECTION AGAINST FIRE
HAZARD,REPLACE WITH SAME TYPE FUSE. FOR FUSE
THIS SYMBOL LOCATED NEAR THE FUSE INDICATES
THAT THE FUSE USED IS SLOW OPERATING TYPE
ATTENTION
VA
ET CALIBRATION COMME INDIQUE.
D'INCENDIE, REMPLACER UNIQUEMENT
PERMANENTE CONTRE LES RISQUES
AFIN D'ASSURER UNE PROTECTION
PAR UN FUSIBLE DE MEME TYPE
AGAINST FIRE HAZARD, REPLACE
VA
FOR CONTINUED PROTECTION
AND RATING INDICATED.
ONLY WITH FUSE OF SAME TYPE
CAUTION
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 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.
!
NOTE

SCHEMATIC DIAGRAM
SKW-520 :
POWERED
SUBWOOFER
HTP-520/SKS-HT520
A
1
2
3
4
5
BCDEFGH
P301A
P301B
P102A
Q601
NJM4558LD
3
+B
8
2
1
Q302
NJM4558LD
3
+B
8
2
1
Q301
NJM4558LD
3
+B
8
2
1
Q601
NJM4558LD
3
2
-B
4
1
Q301
NJM4558LD
5
6
-B
4
7
Q302
NJM4558LD
5
6
-B
4
7
JL535A
BLACK
JL536A
RED
J901B
RED
RED
BLK
F901
5A/125V
P902
R104
20K
R544
100
P631
P531
P902A
P633
Q606
KRA103M
OR DTA124ES
P632A
JL601 OR JL601A
P901A
JL601 OR JL601B
Q605
2SA933S-S/R
OR KTA1267-GR
Q505
KTA1024-Y
OR 2SA949-Y/O
Q519
2SA965-Y
Q517
2SA933S-S/R
OR KTA1267-GR
Q507
KTA1024-Y
OR 2SA949-Y/O
Q604
2SA933S-S/R
OR KTA1267-GR
Q607
2SA933S-S/R
OR KTA1267-GR
Q514
KTB1369-Y
OR 2SA1930
Q516
2SA1987-R/O
Q509
KTA1024-Y
OR 2SA949-Y/O
Q952
KTA1046-Y/GR
OR 2SB941-P
Q602
KRC103
OR DTC124ES
D901
RS404L
D902
RL1N4003
OR GP104003E
D903
RL1N4003
OR GP104003E
D605
1SS133
OR 1SS270A
D604
1SS133
OR 1SS270A
D603
1SS133
OR 1SS270A
D606
1SS133
OR 1SS270A
D651
1SS133
OR 1SS270A
D602
MTZJ2.7B
D601
MTZJ2.7B
D904
MTZJ5.6B
D952
MTZJ15C
D951
MTZJ15C
Q541
2SC3423-Y/O
Q513
KTD2061-Y
OR 2SC5171
Q518
2SC2235-Y
Q506
KTC3206-Y
OR 2SC2229-Y/O
Q609
2SC1740S-S/R
OR KTC3199-GR
Q608
2SC1740S-S/R
OR KTC-3199-GR
Q603
2SC1740S-S/R
OR KTC3199-GR
Q504
2SC2240-BL
Q503
2SC2240-BL
Q502
KTC3200-BL
OR 2SC1775A-F/E
Q501
KTC3200-BL
OR 2SC1775A-F/E
Q515
2SC5359-R/O
Q510
KTC3206-Y
OR 2SC2229-Y/O
Q951
KTC2026-Y/GR
OR 2SD1266-P
P101
C604
33/35
C517
10/50
C905 5600/63
C906
5600/63
C601
10/50
C603
470/16
C602
10/50
C909 22/50
C527
220/16
C528
10/50
C504
220/16
C501
0.47/50
C526
10/50
C954
220/16
C953
220/16
C303
47/50 C308
47/50
C301
47/50
C952
220/16
C951
220/16
C520
224
C519
224
C955
223J
C904
104/100 C903
104/100
C901
472M
C950
104/50
C514
NC
C502
151
C506
070
C503
151
C505
020
C307
104
C306
104
C304
104
C305
104
C934
104
C933
104
C302
101
R620
100K
R619
22K
R621
1K
R614
120K R613
470K
R514
82 (1/4W)
R512
68 (1/4W)
R511
82 (1/4W)
R101
NC
R301
1K
R533
3.3 {1W}
R534
100
R625
180K
R624
100K
R701
PTFL04BC222Q2N34BO
R601
5.6K
R610
560K
R608
22
R607
22
R602
100K
R603
150K
R604
180
R605
10K
R606
10K
R609
39K
R628
330K
R629
22K
R902
820 {1W}
R901
820 {1W}
R904
1K (1/2W)
R622
10K
R623
100K
R627
680K
R626
2.2M
R903 10K
R617
1K
R616
100K
R612
39K
R615
22K
R611
820K
R651
12K {1/2W}
R510
100K
R528
390 (1/2W)
R531(1/2)
0.22 {5W}
R531(1/2)
0.22 {5W}
R501
1K
R522
220
R504
270
R503
5.6K R521
220
R506
1K (1/4W)
R505
1K (1/4W)
R502
47K
R517
3.3K
R509
1K
R507
33K
R515
12K
R516
12K
R526
150 (1/2W)
R541
820
R543
100
R542
150
R527
270
R513
82 (1/4W)
R508
47 (1/4W)
R306
4.7K
R972
47K
R971
10K
R307
100K
R308
47K
R311
5.6K
R312
5.6K
R309
NC
R310/J385
JUMPER
R315
100K
R316
1K
R314
5.6K
R313
5.6K
R305
33K
18K
R304
R303
100K
R302
1M
R954
6.8K {1/2W)
R953
6.8K {1/2W}
R952
82 {1/4W}
R951
82 {1/4W}
15.0V
-15.0V
-14.4V
-50.0V
14.4V
50.0V
0V
49.8V
50.3V
0V
0.6V
-1.0V
1.0V
51.0V
1.6V
-1.6V
-51.0V
0V
5.6V
0V
5.0V
3.9V
0.1V
5.6V
0V
5.5V
5.6V
5.4V
0.3V
0.2V
0V
4 OHM
Sub Woofer W2301B
SPEAKER
NAAF-8275
T901
NAETC-8276
TF
INPUT
NAETC8312
AC 120V / 60HZ
NAPS-8277
AC-H
AC-G
NC
AMPLIFIER PC BOARDU01
INPUT TERMINAL
PC BOARD
U02
POWER TRANSFORMER
PC BOARD
U03
THERMAL SENSOR PC BOARD
U04
E LENT. POUR UNE PROTECTION PERMANENTE,N'UTILISER
CE SYMBOLE INDIQUE QUE LE FUSIBLE UTLISE EST
INDIQUE LA QU LE PRESENT SYMBOL EST APPOSE.
QUE DES FUSIBLES DE MEME TYPE. CE DARNIER EST
RATING REFER TO THE MARKING ADJACENT TO THE SYMBOL
FOR CONTINUED PROTECTION AGAINST FIRE
HAZARD,REPLACE WITH SAME TYPE FUSE. FOR FUSE
THIS SYMBOL LOCATED NEAR THE FUSE INDICATES
THAT THE FUSE USED IS SLOW OPERATING TYPE
ATTENTION
VA
ET CALIBRATION COMME INDIQUE.
D'INCENDIE, REMPLACER UNIQUEMENT
PERMANENTE CONTRE LES RISQUES
AFIN D'ASSURER UNE PROTECTION
PAR UN FUSIBLE DE MEME TYPE
AGAINST FIRE HAZARD, REPLACE
VA
FOR CONTINUED PROTECTION
AND RATING INDICATED.
ONLY WITH FUSE OF SAME TYPE
CAUTION
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 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.
!
NOTE

PRINTED CIRCUIT BOARD VIEWS-1
SKW-520 : POWERED SUBWOOFER
HTP-520/SKS-HT520
A
1
2
3
4
5
BCD
Soldering side
AMPLIFIER PC BOARD (NAAF-8275)U01
R544
P502A
Q517
R543
R533
Q515
C502
R527
C514
J324
Q952
Q541 Q516
R522
R521
J323
R513
R511
J344
J331
R516 R515 R507
R504 R510
C503
R651
R503
R509
R501
R502
C504
C952
C954
C951
R517
R542
R541
Q510
Q506
Q507
R514
R512
R508
C526
C517
Q504
C506
Q505
Q509
Q503
C505
J309
Q502
Q501
R505
R506
C501
C519 C520
J313
J345
C906
C906
C905
C905
NCAF-8275
1
25138275B
P531
R531
J322
J308
R534
C527
C903
C904
J337
Q518
Q519
C528
J305
J310
J304
J311
R528
R526
J303
J302
J320
J312 J321
C953
J306
Q514
Q513
Q951
J328
J342
J329
J343
Q301
Q302
J314
D901
D902
D903
R901
R902
C909
R903 D904
Q601
R603
D602
D601
R604
C602
R605
R606
D604
R608
R602
R601 C601
R904 R625
R627
C604
Q609
R629
D606
R628
R622
Q608
R626
R624
Q606
Q607
Q604
R619
R623
J352
R615
R617
R616
R621
J357
Q603
Q605
C950
R620
R612
R613
R614
D605
Q602 R610
R609
J361
C603
D603
R607
J355
J353
J350
J351 J347
J346
J356
J327
J318
J316
J315
J348
C933
C934
J339
J333
J338
J330
J317
P301B
J332
D951
D952
R953
R954
J319
J371
J372
D651
J373
R611
J380
R301
R302
C301
P632A
J326
C303
R306
R307
R308
R305
R304
C302
R309
R312
R311
C304
C305
R314
R313
C307
C306
C308
R315
R316
P901A
J354
J358
J340
J341
P631
J334
JL601
J359
JL535A
JL535B
R951
R952
R971
R972
P633
R303
E810
RED
BLACK
JL601A
BC E CEB
BCE E
C
BECB
E C B
E C B
1
8
8
8
1
1
led_socket
AC_IN
-Vee
-Vee
+Vcc
+Vcc
+15V
+15V
-15V
J385
7
17
25
15
12
22
17
12
12
12
15
7
20
7
17
7
7
17
15
15
7
7
7
12
17
7
15
7
7

PRINTED CIRCUIT BOARD VIEWS-2
SKW-520 : POWERED SUBWOOFER
HTP-520/SKS-HT520
A
1
2
3
4
5
BCD
Soldering side
INPUT TERMINAL PC BOARD (NAETC-8276)U02
POWER TRANSFORMER PC BOARD (NAPS-8277)
U03
Soldering side
THERMAL SENSOR PC BOARD (NAETC-8312)U04
No PC board view
HOLDER PC BOARD (NAETC-8317)U05
Soldering side
NCETC-8276
25138276
1
R104
R104
P102A
C955
P101
P101
P301A
R101
T901
NCPS-8277
25138277
P902A
5A/125V
RISK OF FIRE
-REPLACE FUSE
AS MARKED.
2
F901
23 56
810121416
AC-H AC-G
C901
J901B
RED
RED
BLACK
J901
J902
F901BF901A
AC-GAC-H
NCETC-8312
1
25138312
E701
JL601
JL601A
R701
22
22

HTP-520/SKS-HT520
ADJUSTMENT PROCEDURE
SKW-520 : POWERED SUBWOOFER /
ADJUSTMENT OF IDLING CURRENT
R544
P502A
Q517
R543
R533
Q515
C502
R527
C514
J324
Q952
Q541 Q516
R522
R521
J323
R513
R511
J344
J331
R516
R515
R507
R504
R510
C503
R651
R503
R509
R501
R502
C504
C952
C954
C951
R517
R542
R541
Q510
Q506 Q507
R514
R512
R508
C526
C517
Q504
C506
Q505
Q509
Q503
C505
J309
Q502
Q501
R505 R506
C501
C519
C520
J313
J345
C906
C906
C905
C905
NCAF-8275
1
25138275B
P531
R531
J322
J308
R534
C527
C903
C904
J337
Q518
Q519
C528
J305
J310
J304
J311 R528
R526
J303 J302
J320
J312 J321
C953
J306
Q514
Q513
Q951
J328
J342
J329
J343
Q301
Q302
J314
D901
D902
D903
R901
R902
C909
R903
D904
Q601
R603
D602
D601
R604 C602
R605
R606
D604
R608
R602
R601
C601
R904
R625
R627
C604
Q609
R629 D606 R628
R622 Q608 R626 R624
Q606
Q607
Q604
R619
R623
J352
R615
R617
R616
R621
J357
Q603
Q605
C950
R620
R612 R613 R614
D605
Q602 R610
R609
J361
C603
D603
R607
J355
J353
J350
J351
J347
J346
J356
J327 J318
J316 J315
J348
C933
C934
J339
J333
J338
J330
J317
P301B
J332
D951
D952
R953
R954
J319
J371
J372
D651
J373
R611
J380
R301 R302
C301
P632A
J326
C303
R306
R307
R308 R305
R304 C302 R309
R312 R311 C304
C305
R314 R313
C307
C306 C308 R315
R316
P901A
J354
J358
J340 J341 P631
J334
JL601
J359
JL535A JL535B
R951
R952
R971
R972
P633
R303
E810 RED
BLACK
JL601A
BC E CEB
BCE E
C
BECB
E
C
B
E
C
B
1
8
8
8
1
1
led_socket
AC_IN
-Vee
-Vee
+Vcc
+Vcc
+15V
+15V
-15V
J385
7
17
25
15
12
22
17
12
12
12
15
7
20
7
17
7
7
17
15 15
7 7
7
12
17
7
15
7
7
Test point
P631
1. Before adjustment of idling current, turn the trimming resistor R544 to counter clockwise.
2. Short test point P631 for Amplifier is under active mode.
3. Connect the DC voltmeter to test point P531.
4. After turn POWER to ON, adjust the trimming resistor R544 so that the reading of voltmeter
becomes 0.25 mV.
<Note> No speaker load and No input signal.
5. Confirm the voltage of above point after five minutes.
6. When less than 4.40 mV : Readjust the trimming resistor above so that the voltage becomes 4.5 mV to 5.0 mV.
When 4.41 mV to 5.50 mV : Not necessary to adjust.
When more than 5.51 mV : Readjust the trimming resistor above so that the voltage becomes 5.0 mV to 5.5 mV.
Amplifier PC board "NAAF-8275"
Test point
P531
Trimming resistor
R544

HTP-520/SKS-HT520
PACKING PROCEDURES-1
SKS-HT520 ONLY
SP01
SP03
SP04
SP02
(Silver model only)
SKW-520
<Note>
HTP-520 ---> Refer to service manual of "HT-S770"

HTP-520/SKS-HT520
PACKING PROCEDURES-2
SKS-HT520 ONLY
BOTTOM
CENTER
TOP
TOP
TOP
SP07
(Bottom)
SP06
(Center)
SP05
(Top)
SP04
SP04
SP10
SP10
SP10
SP04
SP04
SP04
SP04
SP08
SP09
SP08
SP04
Upper side
marking
Upper side
marking
Upper side
marking
SKM-520S(L)
SKM-520S(R)
SKB-520
SKF-520F(L)
SKC-520C
SKF-520F(R)
SKW-520
<Note>
HTP-520 ---> Refer to service manual of "HT-S770"

HTP-520/SKS-HT520
PACKING PROCEDURES-3
SKS-HT520 ONLY
TOP
BOTTOM
L = 15 ft.
(22# 4.5 m)
(White / Black)
L = 15 ft.
(22# 4.5 m)
(Red / Black)
L = 30 ft.
(22# 9 m)
(Blue / Black)
L = 10 ft.
(22# 3 m)
(Green / Black)
SP16
SP04
SP13
SP13
SP11
L = 10 ft.
(3 m)
(Black / RCA)
L = 30 ft.
(22# 9 m)
(Gray / Black)
SP14
SP17
SP19
L = 30 ft.
(22# 9 m)
(Brown / Black)
<Note>
HTP-520 ---> Refer to service manual of "HT-S770"
Refer to "PACKING PROCEDURES-1 / -2"
Front side
SKS-HT520
SKS-HT520

1/16 PAGE
EXPLODED VIEW PARTS LIST <Notes>
(B) : Black model
(S) : Silver model
<L> : Lch
<R> : Rch
REF. NO. PART NAME DESCRIPTION Q'TY PART NO. (SN) REMARKS
EXPLODED SKW-520 (B) : POWERED SUBWOOFER
EXPLODED SKW-520 (S) : POWERED SUBWOOFER
EXPLODED AMPLIFIER SECTION (SKW-520)
EXPLODED Q515 TR 2SC5359-R 1 2203082 !
EXPLODED Q515 or TR 2SC5359-O (1) 2203083 !
EXPLODED Q516 TR 2SA1987-R 1 2203072 !
EXPLODED Q516 or TR 2SA1987-O (1) 2203073 !
EXPLODED Q541 TR 2SC3423-Y 1 2202104
EXPLODED Q541 or TR 2SC3423-O (1) 2202103
EXPLODED Q951 TR KTC2026-Y 1 2203594
EXPLODED Q951 or TR KTC2026-GR (1) 2203595
EXPLODED Q951 or TR 2SD1266-P (1) 2202754
EXPLODED Q952 TR KTA1046-Y 1 2203614
EXPLODED Q952 or TR KTA1046-GR (1) 2203615
EXPLODED Q952 or TR 2SB941-P (1) 2202764
EXPLODED <Note>
EXPLODED When replacement the following the transistor, made from the same HFE rank as the original type.
EXPLODED Q515, Q516, Q541, Q951, Q952
EXPLODED A01 HEAT SINK RAD-197 1 27160547
EXPLODED A02 CUSHION AF (t1.0x7x183) 2 28141572A
EXPLODED A03 CUSHION AG (t1.0x7x123) 2 28141573A
EXPLODED A04 CUSHION (IN) 1 28141574
EXPLODED A05 SCREW 3TTB+8B (BC) 8 838430088
EXPLODED A05 SCREW 3TTB+8B (BC) 3 838430088
EXPLODED A06 BRACKET BRACKET 2 27130745
EXPLODED A07 ISO SHEET AC262 2 223025
HTP-520/SKS-HT520
NOTE : THE COMPONENTS IDENTIFIED BY THE MARK
!ARE CRITICAL FOR RISK OF FIRE AND
ELECTRIC SHOCK. REPLACE ONLY WITH PART
NUMBER SPECIFIED.

2/16 PAGE
EXPLODED A08 SCREW 3SMS8W.SW+14B (BC) 2 801433
EXPLODED A10 SCREW 3TTB+8B 1 838130088
EXPLODED A10 SCREW 3TTB+8B 4 838130088
EXPLODED A10 SCREW 3TTB+8B 2 838130088
EXPLODED A11 RETAINER (PCB) 1 27141912
EXPLODED A13 COVER --- 1 28184894
EXPLODED A15 RETAINER (AC) 1 27141913
EXPLODED A16 SCREW 3TTB+12B (BC) 2 838430128
EXPLODED A101 REAR PANEL (MDD) 1 27123254A
EXPLODED A102 BUSHING S-RELIEF #2271 1 27300750 !
EXPLODED A103 KNOB (VOL) 1 28326201
EXPLODED F901 FUSE 5A-UL/T-237 1 252164 !
EXPLODED P902 AC CORD AS-UC-2 1 253333VOL !
EXPLODED P902 or AC CORD AS-UC-2 (1) 253368LTK !
EXPLODED T901 P TRANS NPT-1495D 1 2301745 !

3/16 PAGE
EXPLODED U01 AMPLIFIER PC BOARD NAAF-8275-1A 1 1B032575-1A
EXPLODED U02 INPUT TERMINAL PC BOARD NAETC-8276-1A 1 1B032576-1A
EXPLODED U03 POWER TRANSFORMERPC BOARD NAPS-8277-1A 1 1B032577-1A
EXPLODED U04 THERMAL SENSOR PC BOARD NAETC-8312-1A 1 1B032512-1A
EXPLODED U05 HOLDER PC BOARD NAETC-8317-1A 1 1B032517-1A
EXPLODED SPEAKER SECTION (SKW-520)
EXPLODED SP01a CABINET ASS'Y SKW-520 (B) 1 000-SKW520BSER (B)
EXPLODED SP01b CABINET ASS'Y SKW-520 (S) 1 000-SKW520SSER (S)
EXPLODED SP02 PLASTIC FOOT --- 4 D249-W52001B-10
EXPLODED SP03a BOTTOM BOARD (B) 1 105-02520B-00 (B)
EXPLODED SP03b BOTTOM BOARD (S) 1 105-02520S-00 (S)
EXPLODED SP04 NAME PLATE (SKW-520 / ONKYO) 1 D231-W52001B-20
EXPLODED SP05 WOOD SCREW Bind 4 x L75 (FOR FOOT) 8 411-B14075AB1
EXPLODED SP06 WOOD SCREW 4STT + 20A (FOR AMP / SP) 16 837440204
EXPLODED SP07 SCREW 4 x 25 (FOR POWER TRANSFORMER) 4 412-D840250B1
EXPLODED SP08 WOOFER 10" 4 ohm 80W (ONKYO) 1 W2301B
EXPLODED SP09 LED HARNESS ASS'Y --- 1 335-SKW520-00
EXPLODED SP11 CUSHION RUBBER PAD 14 x 89 T2 RUBBER (FOR P-TRANS) 2 442-902123-00
EXPLODED SKF-520F (B) <L> / <R> : FRONT SPEAKERS
EXPLODED SKF-520F (S) <L> / <R> : FRONT SPEAKERS
EXPLODED SP21a CABINET ASS'Y SKF-520F (B) <L> 1 000-SKF520FBLSER (B), <L>
EXPLODED SP21b CABINET ASS'Y SKF-520F (B) <R> 1 000-SKF520FBRSER (B), <R>
EXPLODED SP21c CABINET ASS'Y SKF-520F (S) <L> 1 000-SKF520FSLSER (S), <L>
EXPLODED SP21d CABINET ASS'Y SKF-520F (S) <R> 1 000-SKF520FSRSER (S), <R>
EXPLODED SP22 CATCHING HOLDER --- 4 D230-DN3X01B-01
EXPLODED SP23 WOOFER W1364A (ONKYO) 2 W1364A
EXPLODED SP24 TWEETER (WITH ABSORBER) 1 302-D1F5200202
EXPLODED SP26 SCREW 4/16 HEX 8.3ED 12 411-H84016AB2
EXPLODED SP27 SCREW 3.5/16 HEX 7.0ED 4 411-H83516AB1
EXPLODED SP28 NETWORK ASS'Y --- 1 310-SKF520-00
EXPLODED SP29a TERMINAL WHITE / BLACK 1 332-LY104B-40 <L>
EXPLODED SP29b TERMINAL RED / BLACK 1 332-LY104B-00 <R>
EXPLODED SP31a SPEC LABEL (L) --- 1 600-KF520L-00 <L>
EXPLODED SP31b SPEC LABEL (R) --- 1 600-KF520R-00 <R>
EXPLODED SP33a GRILLE ASS'Y (WITH GRILLE CLOTH and LOGO) 1 D201-F52001B-90 (B)
EXPLODED SP33b GRILLE ASS'Y (WITH GRILLE CLOTH and LOGO) 1 D201-F52001S-90 (S)

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EXPLODED SKC-520C (B) : CENTER SPEAKER
EXPLODED SKC-520C (S) : CENTER SPEAKER
EXPLODED SP41a CABINET ASS'Y SKC-520C (B) 1 000-SKC520CBSER (B)
EXPLODED SP41b CABINET ASS'Y SKC-520C (S) 1 000-SKC520CSSER (S)
EXPLODED SP42 CATCHING HOLDER --- 4 D230-DN3X01B-01
EXPLODED SP43 WOOFER W1063A (ONKYO) 2 W1063A
EXPLODED SP44 TWEETER (WITH ABSORBER) 1 302-D1F5200202
EXPLODED SP46 SCREW 4/16 HEX 8.3ED 8 411-H84016AB2
EXPLODED SP47 SCREW 3.5/16 HEX 7.0ED 4 411-H83516AB1
EXPLODED SP48 NETWORK ASS'Y --- 1 310-SKC520-00
EXPLODED SP49 TERMINAL GREEN / BLACK 1 332-LY104B-30
EXPLODED SP51 SPEC LABEL --- 1 600-SKC520-00
EXPLODED SP53a GRILLE ASS'Y (WITH GRILLE CLOTH and LOGO) 1 D201-C52001B-90 (B)
EXPLODED SP53b GRILLE ASS'Y (WITH GRILLE CLOTH and LOGO) 1 D201-C52001S-90 (S)
EXPLODED SKM-520S (B) <L> / <R> : SURROUND SPEAKERS