Onkyo HTP-770B User manual

HTP-770
SERVICE MANUAL
SERVICE MANUAL
7.1-CH HOME THEATER SPEAKER PACKAGE
Black model
MODEL HTP-770(B)
Ref. No. 4152
072009
120V AC, 60Hz
B MDC
Front Speakers (L / R)
"SKF-770"
Center Speaker
"SKC-770"
Surround Speakers (L / R)
"SKR-770"
Powered Subwoofer
"SKW-770"
Surround Back Speakers (L / R)
"SKB-770"
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.

ADJUSTMENT PROCEDURE
SKW-770 : POWERED SUBWOOFER / ADJUSTMENT OF IDLING CURRENT
HTP-770
Test point
DC voltmeter
100 ohm
(1/4W)
P531
<Fig-1>
Test point
P631
MAIN PC board ass'y "NAAF-8829"
Test point
P531
Trimming resistor
R544
Short
[When]
1. Exchange transistors (Q505 - Q519).
2. Exchange MAIN PC board ass'y (NAAF-8829).
[Procedure]
<Note> No speaker load and No input signal.
1. Short test point P631 for amplifier is under active mode.
2. Adjust the trimming resistor R544 so that the reading of multimeter becomes 52 ohm to 53 ohm.
3. Connect the DC voltmeter to test point P531. <Fig-1>
4. Connect the power cord into the AC outlet.
5. Confirm the voltage of above point after 6 minutes to 8 minutes. (Heat running)
6. When less than 3.20 mV : Readjust the trimming resistor above so that the voltage becomes 4.5 mV to 5.0 mV.
When 3.30 mV to 5.20 mV : Not necessary to adjust.
When 5.21 mV to 10.0 mV : Readjust the trimming resistor above so that the voltage becomes 5.0 mV to 5.5 mV.
When 10.1 mV to 20.0 mV : Readjust the trimming resistor above so that the voltage becomes 5.6 mV to 6.0 mV.
7. Disconnect the power cord from the AC outlet.
8. Disconnect the DC voltmeter.

HTP-770
EXPLODED VIEWS-1
SKW-770 : POWERED SUBWOOFER
HTP-770
A08
x 2 pcs.
SP11
x 10 pcs.
A104
x 2 pcs.
A05
x 2 pcs.
A05
x 5 pcs.
A103
A102
P901
U03
A11
E801
A01
U01
A07
A07
A101
A02
A02
A06
U06 A05
Q515
Q516
Q541
F901
T901
A03
SP12
x 4 pcs.
SP13
x 2 pcs.
Refer to "EXPLODED VIEWS-2"

HTP-770
EXPLODED VIEWS-2
SKW-770 : POWERED SUBWOOFER
HTP-770
SP06
SP07
x 6 pcs.
SP08
SP02
x 4 pcs.
SP04
x 4 pcs.
SP01a (Subwoofer ass’y)
(All)
SP01b (Subwoofer ass’y)
(Without AMP unit, Speaker unit and Power transformer)

HTP-770
EXPLODED VIEWS-3
SKF-770 <L> / SKF-770 <R> / SKC-770
HTP-770
SP21a/b (Speaker ass’y)
SP41 (Speaker ass’y)
SP32a/b
SP33a/b
SP54
SP53
SP52
SP47
x 2 pcs.
SP23 : WOOFER
SP24 : TWEETER
SP43 : WOOFER
SP44 : TWEETER
SP34
"SKF-770 <L>"
"SKF-770 <R>"
"SKC-770"
<Note>
Cannot remove the speaker grill.
<Note>
Cannot remove the speaker grill.
Lch
TERMINAL :
White / Black
Rch
TERMINAL :
Red / Black
TERMINAL :
Green / Black
NOT MAGNETICALLY SHIELDED
NOT MAGNETICALLY SHIELDED

HTP-770
EXPLODED VIEWS-4
SKR-770 <L> / SKR-770 <R> / SKB-770 <L> / SKB-770 <R>
HTP-770
SP64SP62
SP68SP66
SP61 SP63
SP65 SP67
"SKR-770 <R>""SKR-770 <L>"
TERMINAL :
Blue / Black
TERMINAL :
Gray / Black
"SKB-770 <R>""SKB-770 <L>"
TERMINAL :
Brown / Black
TERMINAL :
Tan / Black
<Note>
Cannot remove the speaker grill.
NOT MAGNETICALLY SHIELDED NOT MAGNETICALLY SHIELDED
NOT MAGNETICALLY SHIELDEDNOT MAGNETICALLY SHIELDED

HTP-770
SCHEMATIC DIAGRAM
SKW-770 : POWERED SUBWOOFER
A
1
2
3
4
5
BCDEFGH
+5.6V -56.5V +56.5V
J901
MD
J316
E801
Q301(2/2)
NJM4558LD
4
8
5
6
7
Q301(1/2)
NJM4558LD
3
2
1
8
4
Q602
KRC103M
Q606
KRA103M
P301
R651
12K (1/2W)
R951
3.3K
POWER NEED TO CONFIRM
(2W)
R952
3.3K (2W)
R901
820(1W)
R902
820(1W)
0
1
-0.6
1.6V
-1.6
-1
0
0.05
0.6
5.0
D901
D3SBA20
R544 100B
R528
390
(1/2W)
R628
330K
R629
NC
R701
NC
R904
1K
(1/2W)
R903
10K
R609
39K
R611
820K
R610
560K
R616
100K
R617
1K
R621
1K
R615
22K
R612
39K
R614
120K R613
470K
R619
22K
R620
100K
R624
100K
R623
100K R627
680K
R622
10K
R626
2.2M
R625
180K
P901
F901
5A/125V
T901
NPT-1578D
P901A
P903A
P632A
REDBLUE
D601
MTZJ2.7B
D602
MTZJ2.7B
D501
MTZJ5.6B
D952
MTZJ15C
D951
MTZJ15C
D904
MTZJ5.6B
Q516
2SA1987-O/R
Q519
2SA965-Y
Q517
2SA933S-S
Q507
2SA949-Y
Q505
2SA949-Y
Q509
2SA949-Y
Q514
2SA1930
Q604
2SA933S
Q605
2SA933S
Q607
2SA933S
Q541
2SC3423
Q506
2SC2229-Y
Q510
2SC2229-Y
Q503
2SC2240-BL
Q515 2SC5359-O/R
Q513
2SC5171
Q518
2SC2235-Y
Q502
2SC2240-BL
Q501
2SC2240-BL
Q609
NC
Q603
2SC1740S-S
Q608
2SC1740S-S
P902A
JL535A/B
P531
P501B
P633
P631
D651
1SS133
D603
1SS133
D606
1SS133 D903
RL1N4003
or GP104003E
D902
RL1N4003
or GP104003E
D605
1SS133
R302
20KB
C301
C303
NC
C955
223J
C506
070
C502
NC
C514
101
C520
224
C519
224
C505
020
C503
224J
C950
104/50
C903
104J/100
(MPP TYPE)
C904
104J/100
(MPP TYPE)
C302
47/50
C527
1/50
C501
47/50
C517
10/50
C528
10/50
C526
10/50
C504
220/16
C951
220/16
C952
220/16
C909
22/50
C601
10/50
C603
470/16
C602
10/50
C604
33/35
C906
5600/71(MPP) 5600/63(MDD)
C905
5600/71(MPP) 5600/63(MDD)
R306
47K
R301
1K R307
2.2K
R305
33K
R303
47K
R304
27K
R531
0.22
(5W)
R533
3.3
(1W)
R508
47
(1/4W)
R511
82
(1/4W)
R512
68
(1/4W)
R514
82 (1/4W)
R513
82
(1/4W)
R516
12K
R515
12K
R502
47K
R510
100K
R543
180
R526
82
(1/2W)
R517
3.3K
R541
820
R542
150
R505
1K
(1/4W)
R506
1K
(1/4W)
R507
33K
R527
270
R509
1K
R504
2.2K
R503
5.6K
R522
220
R521
220
R501
1K
R603
150K
R601
5.6K
R605
22
R602
100K
R604
180
NAAF-8829
NAPS-8831
MDC
ONLY
AC 120V / 60Hz
(MPP) 224
NC
NC
D607
1SS133
AGAINST FIRE HAZARD, REPLACE
VA
FOR CONTINUED PROTECTION
AND RATING INDICATED.
ONLY WITH FUSE OF SAME TYPE
CAUTION
ATTENTION
ET CALIBRATION COMME INDIQUE.
D'INCENDIE, REMPLACER UNIQUEMENT
PERMANENTE CONTRE LES RISQUES
AFIN D'ASSURER UNE PROTECTION
PAR UN FUSIBLE DE MEME TYPE
VA
E LENT.POUR UNE PROTECTION PERMANENTE,N'UTILISER
INDIQUE LA QU LE PRESENT SYMBOL EST APPOSE.
QUE DES FUSIBLES DE MEME TYPE. CE DARNIER EST
CE SYMBOLE INDIQUE QUE LE FUSIBLE UTLISE EST
FOR CONTINUED PROTECTION AGAINST FIRE
RATING REFER TO THE MARKING ADJACENT TO THE SYMBOL.
HAZARD,REPLACE WITH SAME TYPE FUSE. FOR FUSE
THIS SYMBOL LOCATED NEAR THE FUSE INDICATES
THAT THE FUSE USED IS SLOW OPERATING TYPE
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
POWER TRANSFORMER
PC BOARD
U03
MAIN PC BOARD
U01
LINE INPUT
OUTPUT
LEVEL
SPEAKER
LED
ADJUST.
IDLING
<Note>
NC : No mount of parts.

HTP-770
PRINTED CIRCUIT BOARD VIEWS-1
SKW-770 : POWERED SUBWOOFER
U01 MAIN PC BOARD (NAAF-8829)
Component side
7
25
12
17
15
12
15
7
7
17
12
17
7
7
7
7
7
7
7
7
7
7
22
20
20
R544
P502A
Q517
R543
R533
Q515
C502
R527
C514
J332
Q541
Q516
R522
R521
J322
R513
R511
J334
R516 R515 R507
R504
R510
C503
R651
R503
R509
R501
R502
C504
C951
R517
R542
R541
Q510
Q506
Q507
R514
R512
R508 C526
C517
C506
Q505
Q509
Q503
C505
J310
Q502
Q501
R505
R506
C501
C519 C520
J323
NCAF-8829
2
25138829E
P531
R531
J324
C527
C903 C904
Q518
Q519
C528
J306
J311
J305
J312
R528
R526
J304
J303
J321
J313
J319
C952
J307
Q514
Q513
J340
J333
D903
D902
R902
R901
C909
R903 D904
R605
C602
R604
R603
R602
R904
C604
R622
Q608
R626
R624
Q606
Q607
Q604
R619
R623
R621
Q603
Q605
D605
Q602
R610
C603
R601
J346
J331
D952
D951
J320
J314
J325
D651
P632A
J336 J335
JL535A
JL535B
P633
RED
BLACK
BCE
CEB B
CE
E C B
E C B
1
-Vee
+Vcc
+Vcc
J352
J351
C601
D603
R304
R305
R303
R307
R620
R614
R613
R612
R302
R302
P301
P301
C955
R627
Q609
R629
R628
D606
R625
J348 R611
J337
J327
J326
R616
J342
R301
J344
R617
J338
J347
R609
J341
J318
C950
R314
R311
C311
R315
R312
C316
R313
R316
8123 4567
R319
C314
R317
76543218
R320
J302
C303
J309
J329
R615
J349
J350
2345678
P911
J301
D501
R545
Q504
P903A
RED REDBLK
Q301
Q302 Q303
R701
E701
C301
P631
P912
C906
C906
C905
C905
R952
J955
R951
E801
D601
D602
C302
R306
D901
J956
P301A
C312
R321
C313
D607
J308
J316
J330
C315
A
1
2
3
4
5
BCD

HTP-770
PRINTED CIRCUIT BOARD VIEWS-2
SKW-770 : POWERED SUBWOOFER
15
15
15
15
NCPS-8831
25138831
RISK OF FIRE
-REPLACE FUSE
AS MARKED.
2
23 56
810121416
AC-H AC-G
P902A
F901A F901B
5A/125V
F901
1P905A
P907A
P906A
J901
J905
J903
J904
J902
T901
T901
P903A
P901A
AC-GAC-H
A
1
2
3
4
5
BCD
U03 POWER TRANSFORMER PC BOARD (NAPS-8831)
Component side

1/12 PAGE
HTP-770
EXPLODED VIEWS PARTS LIST
<Notes>
<L> : Lch
<R> : Rch
REF. NO. PART NAME DESCRIPTION Q'TY PART NO. (SN) REMARKS
EXPLODED SKW-770 (B) : POWERED SUBWOOFER
EXPLODED AMPLIFIER SECTION (SKW-770)
EXPLODED Q515 TR 2SC5359-R 1 2203082 !
EXPLODED Q515 or TR 2SC5359-O (1) 2203083 !
EXPLODED Q516 TR 2SA1987-R(Q) 1 2203072 !
EXPLODED Q516 or TR 2SA1987-O (1) 2203073GR !
EXPLODED Q541 TR 2SC3423-Y 1 2202104
EXPLODED Q541 or TR 2SC3423-O (1) 2202103
EXPLODED <Note>
EXPLODED When replacement the following the transistor, made from the same HFE rank as the original type.
EXPLODED Q515, Q516, Q541
EXPLODED A01 HEAT SINK 230 1 27160591
EXPLODED A02 CUSHION --- 2 28141682
EXPLODED A03 CUSHION --- 1 28141691
EXPLODED A05 SCREW 3TTB+8B(3BC) 8 838430088GR
EXPLODED A06 TAPE TAPE(CLOTH-16U) (1) 29110083
EXPLODED A07 ISO SHEET AC262 2 223025
EXPLODED A08 SCREW 3SMS8W.SW+14B(CU) 2 801634
EXPLODED A11 RETAINER (PCB) 1 27142025
EXPLODED A101 REAR PANEL (MDD) 1 27124058 N
EXPLODED A102 BUSHING S-RELIEF #2271 1 27300750 !
EXPLODED A103 KNOB (VOL) 1 28326463
EXPLODED A104 SCREW 3SMS8W.SW+14B(3BC) 2 801433GR
EXPLODED F901 FUSE 5A-UL/T-233 1 252326GR !
EXPLODED P901 AC CORD AS-UC-2 1 253368BLTK !
EXPLODED P901 or AC CORD AS-UC-2 (1) 253368AYUN !
EXPLODED T901 P TRANS NPT-1578D 1 2301948 !
EXPLODED E801 WIRE TIE BSK-1 1 260208
NOTE : THE COMPONENTS IDENTIFIED BY THE MARK
!ARE CRITICAL FOR RISK OF FIRE AND
ELECTRIC SHOCK. REPLACE ONLY WITH PART
NUMBER SPECIFIED.