Onkyo HTR-280(B) Service Manual page 28

A B
PRINTED CIRCUIT BOARD VIEWS-4_2
DISPLAY SECTION
01.GNDV_AUX 09.+15V
1
02.AUX_V 10.MICOUT
308/508 03.GNDA_AUX 11.-15V
04.AUX_L 12.LEDZONE2
05.LEDTHRU 13.+5.0VDIS
31
30 06.AUX_R 14.GNDDG
07.MICMUT 15.GNDDG
08.MICDET 16.VOLB
C7021
20
C7022
C7305
10
1
R7414
R7405
C7402
Q7005
2 R7406
R7411
C7404
R7407
308/508
1
R7415
D7412
R7402
R7416
C7421
ALL
ALL
3
U0043
BAETC-0374 (POW SUPPLY PC BOARD)
B-side(Soldering side)
9.LEDPURE
8.LEDPURE
HOLDER
7.LEDZONE2
6.LEDTHRU
ALL
5.LEDSTBY
4.KEY0
4
3.+5.0VDIS
2.GNDDG
QPWBCDIS0373C2
1.KEY0_1
R7151
25140374 2
R7152
Q7153
R7153
Q7154
ALL
R7154 ALL
9
HOLDER
HOLDER
5
1
R7102
ALL ALL
C
BADIS-0373 (DISPLAY PC BOARD)
U0040
B-side(Soldering side)
17.VOLA 25.KEY0
ALL
18.KEYINT1 26.FLDSDO
19.LEDSTBY 27.FLDCLK
20.KEYINT0 28.FLDCS
21.+3.3S 29.FLDRST
22.KEY3 30.REMIN
23.KEY2 31.LEDPURE
R7033
24.KEY1
C7031
ALL
R7126
R7127
R7124
R7129
R7128
ALL
C7301
R7301
Q7404
ALL
608
C7304
ALL
C7309
R7106
C7303
ALL
BADIS-0375 (VIDEO PC BOARD)
U0042
B-side(Soldering side)
PR Y
PB
DCTL
+5V
YI2 PBI1
PRI2
PBI2 PRI1 YI1
27
V Y PR PB
24
GNDA
23
GNDA
5VACDC
5VDCDC
GNDDG GNDDG
12VD
12VD
GAUX
POF2
AUX
VMUT
VSCL
VSDA
DCTL
MPINT MPRST
MPCL
MPTX
MPDA
FCTL
MPRX
MPDET
2
POF2_1 1
+12V
GND
D E
C7011
R7007
C7017
R7001
R7117
R7115 R7116 R7118
ALL
ALL
R7107 R7108 R7109 R7110 R7130 R7111
ALL
14
1
Q2001
40
QPWBCDIS0373C2
25140375 2
TX-SA578/ 608 TX-SR308/ 508/ 578/ 608 HT-R280/ 380/ 538/ 580/ 680/ 980/ C230/ C260
F G
C7032
308/508
C7010 C7016
5.+3.3VMPU
4.FLAC2
3.-VP
2.FLAC1
1.+3.3VMPU
C7012
C7042
R7042
R7041
C7002 C7003
R7002
R7121 R7122
9.LEDPURE
R7119 R7120 R7103
8.LEDPURE
ALL ALL
7.LEDZONE2
6.LEDTHRU
5.LEDSTBY
4.KEY0
3.+5.0VDIS
2.GNDDG
1.KEY0_1
9
ALL
1
R7112 R7113 R7114
25140373B 2
QPWBCDIS0373C2
ALL
U0041 BADIS-0376 (STADBY KEY/LED PC BOARD)
B-side(Soldering side)
GND_VD
+12VTRG
GND_VD
1
GNDP
+12V
Z2_L
Z2GND
Z2_R
GNDD
GNDV
VIN
MPDET
MPINT
MPTX
MPRX
MPRST
MPCL
MPDA
15
S2-2
S2-1
BAETC-0377 (HP JACK PC BOARD)
U0044
B-side(Soldering side)
QPWBCDIS0373C2
C7202
5
VCC
GND
1 L7203
H
QPWBCDIS0373C2
25140376 2
1.POWERD 4.+12VD_ST
2.+10VS 5.POFF
3.GNDDG
C921
1
5
25140377 2