Power Supply Section - Onkyo TX-8020B Service Manual

A
SCHEMATIC DIAGRAMS-12(PART-12)

POWER SUPPLY SECTION

1
!
THE COMPONENTS IDENTIFIED MARK ARE CRITICAL FOR SAFETY, REPLACE ONLY WITH PART NUMBER SPECFIED.
VOLTAGE (MEASURED WITH VOLTMETER) IS DC VOLTAGE. (NO INPUT SIGNAL)
ELECTRLYTIC CAPACITORS ( ) ARE IN uF/WV.
ALL CAPACITORS ARE IN pF/50WV UNLESS OTHERWISE NOTED.
EX) 030 -> 3pF, 330 -> 33pF, 331 -> 330pF, 333 -> 0.033uF
CIRCUIT IS SUBJECT TO CHANGE FOR IMPROVEMENT.
!
uF/WV
pF/50WV
) 030 -> 3pF, 330 -> 33pF, 331 -> 330pF, 333 -> 0.033uF
CAUTION
FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,
2
V A REPLACE ONLY WITH FUSE OF SAME TYPE AND RATING INDICATED.
CAUTIONF ATTENTION
AFIN D'ASSURER UNE PROTECTION PERMANENTE CONTRE LES RISQUES D'INCENDIE,
V A REMPLACER UNIQUEMENT PAR UN FUSIBLE DE MEME TYPE ET CALIBRATION COMME INDIQUE.
THIS SYMBOL LOCATED NEAR THE FUSE INDICATES THAT THE FUSE USED IS SLOW OPERATING TYPE
FOR CONTINUED PROTECTION AGAINST FIRE FUSE HAZARD, REPLACE WITH SAME TYPE FUSE.
RATING REFER TO THE MAKING ADJACENT TO THE SYMBOL.
CE SYMBOLE INDIQUE QUE LE FUSIBLE UTLISE EST A LENT, E POUR UNEPROTECTION PERMANENT,
N'UTILISER QUE DES FUSIBLES DE MEME TYPE.
CE DARNIER EST INDIQUE LA QU LE PRESENT SYMBOL EST APPOSE.
3
4
B
MODEL NO.TX-8020 SCHEMATIC DIAGRAM(PART-12) PS SECTION
BAPS-1476
POWER SUPPLY
*T902
!
*T902 9
1
8
2
7
3
6
TYPE
4
5
D NPT-1520JQ
P NPT-1520GQ
!
AC CORD
3/100A,250V OR
3A/120V,250V
*RL901
TYPE AC TYPE
D 120V /60Hz D
230V
P /50Hz P
C
U0036 POWER SUPPLY PC BOARD
R955
Q951
10k
D933 R954 NJU7706F27A3
VDD OUT
1SS352
5 4
D935
DS MR
1 3
1SS352
2
D930 1SS352
D931 1SS352
D923 1SS352
D921 1SS352
D924 1SS352
D922 1SS352
NEJITANSI ST3
R921
150 1/2W
D925 1SS352
C902
104Z
25V
RL901
!
3 2
NSCT-1P2031
4 1 F901C
F901D
*F901
C901
NSCT-1P2031
! !
0.01uF/275V/X2
*F901
TYPE
NRL-1P5A-DC9-179 D 4A125V
NRL-1P5A-DC9-179 P T2AL250V
D E
*R954
D Type 15k
M Type 33k
POFF
+12VD_ST
GNDDG
+10VS
POWERD
1 2 3 4 1 2 3 4
P901 P903
NEJITANSI ST3
*T901
TYPE
D NPT-1618D
P NPT-1618P
TX-8020