Onkyo HTR-280(B) Service Manual page 25

A B
PRINTED CIRCUIT BOARD VIEWS-1_2
AMPLIFIER SECTION
BAPS-0342 (FL TUBE -VP PC BOARD)
1
U0011
B-side(Soldering side)
2
U0014
BAETC-0345 (TRANS TRM PC BOARD)
B-side(Soldering side)
BLK
3 1 1
1 25140345
QPWBCAF0341B1
U0012
BAETC-0343 (THERMAL SEN PC BOARD)
B-side(Soldering side)
QPWBCAF0341B1
C6631
TP631
4
5
C
BAAF-0341 (AMPLIFIER PC BOARD)
U0010
B-side(Soldering side)
1
R6902
R6903
Q6707
D E
C6121 C6122 C6120
R6131
R6231
R6130
R6230
R6132
R6232
R6912
R4101
Q4101
R4111
Q6057
Q6051
Q6055
Q6053 Q6052
R4060
C4037 C4035
R4035
R4076 C4036
R4036
D4206
TX-SR308 HT-R280/ 380/ 538/ C230
F G
C6123
C6127
C6124
R6237
R6137
R6110
D6027
R6111
R6121
R6091
R6112
R6122
R6017
R4132
R4100
R4110
R4189
Q4104 Q4103
Q4100 Q4117
R4114
Q4107
R4105
R4117
Q4102
R4115
R4107
R4116
R4112
R4304
R4086
R4303
Q4109
R4013
R4118
R4053
R4059
R4044
R4019
R4008
R4015 R4007
R4055 R4047
R4018
R4017
C4007
R4057
R4016
R4014
C4018
C4016
C4015
C4017
H
C6093 R6216
C6094
R6217
R6213
R6214
Q6024
R6074
R6104
R6107
R6077
R6100
R6102
R4180
R4211
HP_GND
Q4130
8
PRERLSB
R4167 SPRLCS
SPRLSB_SPB
HPDET
SPRL_F
1
Z2 MUT
R4182
R4091 R4181
1 R4093
A MUTE
R4097 R4092
VOLH
R4099
R4096
Q4003 SEC1H
IPROT
VPROT
VL CK
8 VL DA
+15V/+12V
-15V/-12V
R4194 MIC
AUX R
AUX GND
R4196
AUX L
DACSBL
DACSBR
DACSL
DACSR
DACC
DACSW
DACFL
DACFR
NC
RTAD
LTAD
AGND
AGND
TU_L
R4081
R4080 TU_GND
TU_R
R4043
RI_GND
RI
R4000