Onkyo HTP 770 Service Manual

Page 1

ONKYO SERVICE MANUAL

HTP-770

Ref. No. 4152
072009

7.1-CH HOME THEATER SPEAKER PACKAGE

Front Speakers (L / R)
"SKF-770"

MODEL HTP-770(B)

Surround Speakers (L / R)
"SKR-770"
Center Speaker

"SKC-770" @ ®

Surround Back Speakers (L / R)

"SKB-770"

Black model

B MDC 120V AC, 60Hz

SAFETY-RELATED COMPONENT
WA R N I N G ! !

COMPONENTS IDENTIFIED BY MARK A 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 0R RESISTANCE
MEASUREMENTS TO DETERMINE THAT EXPOSED
PARTS ARE ACCEPTABLY INSULATED FROM THE
SUPPLY CIRCUIT BEFORE RETURNING THE
APPLIANCE To THE CUSTOMER.

ONKYO®

IMAGINATIVE SIGHT SI SOUND

Powered Subwoofer
"SKW-770"

Page 2

ADJUSTMENT PROCEDURE

SKW-770 : POWERED SUBWOOFER / ADJUSTMENT OF IDLING CURRENT

[When]

1. Exchange transistors (Q505 - Q519).

2. Exchange MAIN PC board ass'y (NAAF-8829).

[Procedure]

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.

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 320 mV : Readjust the trimming resistor above so that the voltage becomes 4.5 mV to 5.0 mV.

When 330 mV to 5.20 mV : Not necessary to adjust.

HTP-770

When 521 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.

Trimming resistor

R544

Test point
P531

100 ohm
(1/4W)

DC voltmeter

o

Test point 00

P531

O

MAIN PC board ass'y "NAAF-8829"

Test point
P631

Short

Page 7

HTP 770

- I - - - - - - - - - - - - - -. - - - - - - - I v THE COMPONENTS IDENTIFIED EV MARK A ARE CRITICAL FOR SAFETY
' NAAF.8829_|- REPLACE ONLY WITH PART NUMBER SPECIFIED.
LINE INPUT 0301(1/2) I- - _ _ - VOLTAGE (MEASURED WITH VOLTMEIER) (:IIS DC VOLTAGEINO INPUT SIGNAL).
NJM4555LD m MAI N PC BOARD - ALI. PNP TRANSISTORS ARE EQUIVALENTTO 2SAI0150R UNLESS OTHERWISE NOTED.
R301 8 - ALL NPN TRANSISTORS ARE EOUIVALENTTO ZSCIBISVGR UNLESS OTHERWISE NOTED.
I 1K 3 + 1 R307 ' - ALL DIODES ARE EQUIVALENTTO 153133 UNLESS OTHERWISE NOTED.
2 ;K - ELECTROLYTIC CAPACITORS I .a: )ARE IN uF/WV.
% 0302 2 ' - ALL CAPACITORS ARE IN pF/SOWV UNLESS OTHERWISE NOTED.
_ N 47/50 4 EX) 0307 SpF 3307 aapF 3317 330pF 3337 0.033uF
§== § IE 5+ H305 x o g I - ALL RESISTORS ARE IN OHMS 1/4wATTS UNLESS OTHERWISE NOTED.
' g 33K 0 § w . THE THICK LINES ON PC EIOARD ARE THE PRINTING SIDE OFTHE PARTS.
m
N K g 0303 EX) -/ PRINTING SIDE
v a: gx N 0 - CIRCUIT IS SUBJECT TO CHANGE FOR IMPROVEMENT
ER: NC : No mount of parts. I
I
OUTPUT CAUTION
LEVEL FOR CONTINUED PROTECTION
I AGAINST FIRE HAZARD, REPLACE
I - I ONLY WITH FUSE OF SAME TYPE
I AND RATING INDICATED.
ATTENTION
AFlN DASSURER UNE PROTECTION
' R505 R506 R511 A R513 A I PERMANENTE CONTRE LES RISQUES
1K 1K 82 0509 82 051B D'INCENDIE. REMPLACER UNIQUEMENT
"W "W ("4") 25mg; 4W 2302235 EIRCKITSEIIDLS ESTISETNLIESE
0513
I KB 0517 a: A
0505 25A933S-S I E
23A949-Y R541 R517 0515 ZSCSSSQ'O/R THIS SYMBOL LOCATED NEAR THE FUSE INDICATES
o 8 820 3.3K 2305171 THATTHE FUSE USED IS SLow OPERATING TVPE
-€ 8:: In II) FOR CONTINUED PROTECTION AGAINST FIRE
I D ' H525 HAZARDREPLACE WITH SAME TYPE FUSE. FOR FUSE
Q501 0502 390 8 I RATING REFER TO THE MARKING ADJACENT TO THE SYMBOL.
250224041 2302240-BL 4% 051745: (1/2w) E
0501 R501 [-10 (I7 Q 0505 0541 10/50 I SPEAKER FR.
R951 45 ® @ II 2503423 "33 CE SVMBOLE INDIOUE QUE LE FUSIELE UTLISE EST
I 3 3K (2W) l47/50 1K _I_C503 020 I g I E LENT.POUR UNE PROTECTION PERMANENTEINUTILISER
0 - 0 QUE DES FUSIELES DE MEME TYPE. CE DARNIER EST
n 0951 E if"; 0502 R53}? J22 R507 H515 R542 R S C526E |_ 4 % INDIQUE LA ou LE PRESENT SYMBOL EST APPOSE.
220/16 E 8 POWER NEED TO CONFIRM E C R521 R522 33K 12K 15° 8 2 10/50 3
3 . z 220 220 0507 25A1987-O/R R533
' o N L 23A949-Y R516 83% , R543 3 3 .
In .
0952 2 1:33 R503 R509 0 ) 12K1 ._ u: I 180 (35ka (1w)
220/16 E 3 56K 1K 16 4% 1%
R952 . ' ADJUST. - -
2 A R508 Q , IDLING . 0514 0519
I 3.3K (2w) g 0503 R527 :3 2SA1930 __ 224 I
g w- R510 2S02240-EL 270 I ) 0519 I
x g 0527 100K m 25A965-v __0520
e c: z _ g 0506 224
I 1,50 1: S R504 a 0504 2802229-Y
g S all 2 2K i 220/16 R512 R514 0514:: .
57:8 2 - & ea 82 (1/4W) 101
9 (1/4w)
I
I
(I)
(-1
ES:
8 8 w
I \ :7 a. N o Pam
BE 0 Q9 '
§ § 0301(2/2)
.n' u: NJM455aLD 0603 0606
KRA103M f 5.07 H624
' 5 a 1936:1333 2601740S-S ' 100K I
+ 7 R610 75 R619 P631 REIT/4003
r.
/ R335 56on _ ® 2;} D606 R904 H90. yam/m m POWER TRANSFORMER
4 o a n A
I m w x g g m 0607 R623 70-05 ISS133 1K 320(1wI .3903 III PC BOARD
R603 365% 8 E amass 100K R627 *1 (2) HUN/1003 8 E ' _ _ _ _
150K 0 3 470K Q 630K R623 m R902 orGP104003E D901 0:: l MDC NAPS-8831 I
m ' 0605 0603 ° S: m I: DasBA20 0 IL '
1 K 8 0 R613 1 R620 fl? 2S017403-S (I) 330K m o X g 120an 2 ONLY '
2 120K 2SA9335 Ki ° 8 V
I D601 D602 IL 0602 1w T R617 100K % R629 I_ Q I «-
x N L, MTZJ2.7B MTZJ2.7B KHC103M H614 605 1K R626 N0 2 a I
0 '3 188133 0909 o
E E § E J x N R621 22"" H625 0604 3 0:98 1522/50 EEC? §
N a» 5 R615 R616 1K R622 5 I; a:
I (336% m 22K 100K 10K 130K 33/35 R701 E n:
0950 N0 3 i»
I.
104/50 1' "g " g A70 m
1 D607 1 E
. 1.18.8193 5755906 3-- I: P901 (I:
L o n P632A g 8" a
I-I 0 2L AC 120v / 60Hz
BLUE RED 3 v I
I LED I