Onkyo HTR-548 SERIES User Manual

DTR-20.3/DTR/30.
3
SCHEMATIC DIAGRAM/ BLOCK DIAGRAM-12
DTR-20.3/DTR-30.
3
RS-232/ 12V TRIG./ IR SECTION
PART-12
A
1
2
3
4
BCDE
CHGND
RS232TXD
RS232RXD
+3.3VMPU
+10V REMIN2 TRGC TRGB
TRGA
GND_D
RS-232C
RS-232
+3.3VMPU
N.M
LOWER
P4801
LOWER
UPPER
LOWER
UPPER
UPPER
IR OUT
IR IN B
12V TRG B
12V TRG A
12V TRG C
IR IN A
+12VTRG
GND_VD
BAETC-0645
FROM BADG-0643(PART-06)
FROM DIGITAL IN/DAC/MPU PWB
FROM BAVD-0672(PART-07)
FROM VIDEO PWB
DTR-20.3/30.3 Schematic Diagram RS-232/12VTrig/IR Section (PART-12)
Q4811
ICL3221E
16
FORCEOFF
15
VCC
14
GND
13
T1OUT
12
FORCEON
11
T1IN
10
INVALID
9
R1OUT
8
R1IN
7
V-
6
C2-
5
C2+
4
C1-
3
V+
2
C1+
1
EN
R4808
10K
R4809
10K
R4860
10K
C4801
223K
R4861
330
R4862
330
P4811
RS-232
10
1
6
2
7
3
8
4
9
5
11
R4865
100
R4866
1K
D4819
12
D4830
SIR-34ST3F
12
D4831
SIR-34ST3F
12
R4847
100
R4838
100
Q4819
PC817X
1
4
Q4813
2SB1240
R4825
1K
D4829
KDS4148U
21
D4828
KDS4148U
21
R4824
47
R4855
47
R4854
8.2
R4853
47
R4823
1K
D4827
KDS4148U
21
D4826
KDS4148U
21
D4825
KDS4148U
21
D4824
KDS4148U
21
R4822
8.2
R4821
1K
R4820
47
Q4812
KTA1266
R4849
100
P4814
5
6
4
2
3
1
P4812
5
6
4
2
3
1
P4813
5
6
4
2
3
1
Q4816
KTA1266
Q4814
KRC102S
1
3
2
Q4815
KRC102S
1
3
2
Q4817
KRC102S
1
32
Q4818
KRA102S
2
1
3
R4806
330
R4807
330
R4858
0
Q4820
PC817X
4
R4829
220K
R4837
220K
R4826
220K
R4857
10K
C4824
100/25
C4835
100/6.3
C4802
1/50
C4806
1/50
C4807
1/50
C4803
1/50
C4804
100/10
C4805
223K
C4836
102K
C4837
102K
R4848
100(1W)
L4801
BLM21PG221SN1
JL607BNSCT-3P95
1
2
3
JL601B
9 8 7
6
5 4
3
2
1
C4819
103K
C4820
103K
U4801
KSM-603TE5B
3
2
1
5 4
U0043

Onkyo HTR-548 SERIES Specifications

General

Brand	Onkyo
Model	HTR-548 SERIES
Category	Receiver
Language	English