Onkyo TX-NR838 Service Manual page 51

A B
SCHEMATIC DIAGRAMS-26
TRM(RS232/TRIG) SECTION
1
MODEL NO.TX-NR838 SCHEMATIC DIAGRAM(PART-11)
RS-232/12VTRIG/IR SECTION
2
12V TRG A
(150mA)
*P1217
MSJ-035-22
3
4
IR IN A
*P1214
MSJ-035-22
5
6
6
7
8
9
7
8
C D
BAAR-1545
U0042
IR/TRIGGER/RS232
*R1222
8.2
*Q1213
*R1254
2 2SA1201-Y(TE12L,CF)
12V TRG OUT
3 NC
8.2
1 GND_VD
*Q1261
2SA1162-GR
*Q1215
KRC102S
IRIN
*R1247 *R1265
2
1 4
3
NC 3.9k
470
1
2 3
*Q1220
TLP785(BL-TP6_F(C
1 2 3 4
*P1201
NEJITANSI ST3
*C1201
10
223K
1 50V
2
*R1261
3
330
*R1262
4
330
5
11
TX-NR838
E F G
*R1269
NC
*Q1260
2SC2881-Y(TE12L,CF)
*R1268
220
1W
H I
GND_VD
+12VTRG
GND_VD
IR IN A TRIG A
RS232C
P1214 P1217
REARPANNELVIEW
NC
TRIGA
NC
IRIN
GND_DG
+3.3VMPU
GND DG
NC
NC
RS232RXD
RS232TXD
TX-NR838
J K