ONKYO TX-8555
Manual de Servicio

TX-8555
A B C D E

SCHEMATIC DIAGRAMS-4(SD-4)
POWER SUPPLY SECTION 1
Refer to following table about the parts displayed by mark "LIST".
MODEL---> TYPE---> T901 F901 F902 F903 J904 J905 5 J907 6 4 J918 7 3 J930 9 1 T902

TX-8555
MDD NPT-1575D NPT-1520JQ 6A125V NONE 5A125V YES NONE YES NONE NONE MPP, MPA NPT-1575P NPT-1520GQ NONE T2.5AL250V T2.5AL250V NONE NONE YES YES YES

NAETC-9675 U13 TRANS. PRI. TERMINAL PC BOARD
POWER TRANS.

T901
LIST 18 F903 LIST C904 C903 +

P922A NC

P921A NC

NAPS-9674
NC
INPUT VOLTAGE J931 NC J932 NC S901 240V J904 LIST J930 LIST 120V F902 LIST 7 P911B P913B P912B + F901 LIST

W type only
1 3

17 16 15 14 13 5 THERMAL FUSE 12 11 10 TRANS. SEC. TERMINAL PCB

R906 P910

D907 NC R905 100K

U12 POWER SUPPLY PC BOARD
100/35 2200/35

2
P901 P901A AC-H AC-G

AC OUTLETS SWITCHED

C905 + 1 Vc 10/50 2 Vin 3 GND R907 4 Vout

J918 LIST

To NAAF-9610 SD-1 : G4

82K 5 ADJ

AC IN MDC : 120V, 60Hz MPP : 230 - 240V , 50Hz MPA : 230 - 240V , 50Hz

C912 103M/275

9 8

T902 LIST
8 2

RL902

CAUTION
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.

C902 104Z

D912 1SS355 Q912 KTC3199-GR R913 J905 NC R915 220(1/2W) D TYPE 150(1/2W) P TYPE 1K R914 100K

A

V

ATTENTION
AFIN D'ASSURER UNE PROTECTION PERMANENTE CONTRE LES RISQUES D'INCENDIE, REMPLACER UNIQUEMENT PAR UN FUSIBLE DE MEME TYPE ET CALIBRATION COMME INDIQUE.
P913A JL911A P911A P912A NC

3

A

V

D913 1SS355

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.

NC

Q901 SI-3010KF

NOTE

TO NADG-9670

D901 100K D902 D901 - D909, D991, 992 : 1SS355 D903 D904 R908 10K

SD-2 : C5

J906

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.
NC

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.

C907 100/35

1 GND_MPU 2 POWER 3 +10S 4 POFF 5

D905 C991 104Z D991 D906 J907 LIST

+22VS 6 GND_RL 7

TX-8555

4

D992 P991

D908 R909 100K D909 C906 4.7/50 D914 UDZS5.1B

<Note> NC = No mount of parts.

SD-Z : XY
Location of connected terminal in schematic diagrams. SD-Z = Schematic diagrams-Z. X = A to H, Y = 1 to 5.