Onkyo HTR-280(B) Service Manual page 7

Reference materials, (protect detection)
SP_FL/ FR/ SW
SPB_L/ R
SP_SL/ SR/ C
GNDDG2
1
+3.3VMPU
2 2
THERMAL 3
MPU
VOLH
SEC1H
IPROTECT
VPROTECT
D6031
1SS133
C6090 D6032
100/25 1SS133
R6215
NC
C6091
1/50
D6033
UDZS3.3B
R6214
220K 47K
R6216
C6092
1/50
D6034
UDZS3.3B
R6217
47K
R6219
220K
Thermal Senser
PC board
O
R6120 47K
D6020
VPRO
R6110 47K
Q6023
2SC2240-BL
R6213
10K
C6093
104Z
R6218
10K
C6094
104Z
+49V
Amplifier PC board
Power Amplifier IC
+49V
-49V
FL
L
Q6010
2SC2240-BL
+24V
T901
S4
S3
1
S2
AC_S1L+
3
S1
AC_S1L-
TX-SR308 HT-R280/ 380/ C230
+22V
RL601
1
6
3 2
4 5
SP_FL/ FR
Q6051
KRC105
RL602
1
6
3 2
4 5
RL603
1
6
3 2
4 5
Q6052
KRC105
SP_C
SP_SL/ SR Q6055
KRC105
Q6707
2SC2712-GR
R6197
RL6902
(1W) 4
8.2
1
AC S1H+ 3
5 2
NRL-1P10A-DC12-196
5 2
AC S1H- 3
1
4
RL6901
NRL-1P10A-DC12-196
1 S1L+
SN5051
F6901
SN5051 1
S1L-
Amplifier PC board
F6902
RL607
1 6
SPL
3 2
4 5
Q6057
KRC105
SP_SW
RL605
1
6
3 2
4 5
Q6053
KRC105
SPB_L/ R
+49V
D10XB60H
D6901
4
--49V