Schematic Diagrams - Onkyo HTR-280(B) Service Manual

TX-SA578/578V/608 TX-SR308/508/578/608 HT-R280/380/538/580/680/980/C230/C260 DTR-20.2/30.2
A B

SCHEMATIC DIAGRAMS-2

Video BLK Section
1
JAPAN Model only
2
14 7
13 6
12 5 TC74HC4053
11 4
10 3
9 2
8 1
3
14 7
13 6
12 5
11 4
10 3
9 2
8 1
D4 VIDEO INPUT
4
Y1
CB1
5
NJM1326FH2
CR1
Y2
PY
Yin1
Yin2
CB2
6dB
CR2
COMPONENT VIDEO INPUT
PBin1 PB
PBin2
6dB
6
PRin1
PR
PRin2
6dB
DVD
VCR/DVR
CBL/SAT
Vin2
7
GAME/TV
Vin3
CV
Vin4
Vin5
6dB
Vin1
AUX1
(FRONT)
COMPOSITE VIDEO INPUT
UPort SYin1
YCMIX
8
C D
TX-SR578, TX-SR608, HT-R680, HT-R980, TX-SA578, TX-SA608, HT-RC260, DTR-20.2, DTR-30.2
TX-SR608, TX-SA608, DTR-30.2
Q8661
TMDS
TMDS
TMDS141
CEC
HDMI CEC Rx
DDC HDMI Buffer
FRONT DDC
RPWR
+5V
HPD
HP DET
TX-SR608, TX-SA608, HT-RC260,
DTR-20.2, DTR-30.2
TMDS
TMDS
CEC
CEC
HDMI IN5 DDC
DDC
Rx0
RPWR
+5V
HPD
HP DET
TMDS
TMDS
CEC
CEC
HDMI IN4 DDC
DDC
Rx1
RPWR Q8161
+5V
HPD
SiI9387
HP DET
TMDS Fast Switching
TMDS
CEC
CEC
HDMI IN3 DDC
DDC
Rx2
RPWR
+5V
HPD
HP DET
TMDS
TMDS
CEC
CEC
HDMI IN2 DDC
DDC
Rx3
RPWR
+5V
HPD
HP DET
INH
A
B
TMDS
TMDS
CEC
CEC
HDMI IN1 DDC
DDC
Rx4
RPWR
+5V
HPD
HP DET
TX-SR608, TX-SA608, HT-RC260,
DTR-20.2, DTR-30.2
RGB
VS,HS
PC VIDEO IN
I2C
ADINPY
ADINPB
ADINPR
ADINCV
GND
DRV
DRV
DRV
DRV
DRV
DRV
DRV
DRV
DRV
DRV
DRV
DRV
I2C
MUTE
E F G
CEC
TMDS
Tx
DDC
Rx3
Q8501
SII9233
HDMI
4Rx 12bit x3
Q8801
Q8802
Rx2
Q8803
10bit x3 10bit x3
Q8804
TTL TTL in TTL out
TC74VCX162827FT x4
Bus switch
Rx1
Q8200
FLI32626
HDMI
SEQUIOA
TMDS
Video
Processor
DDC
Tx Rx0
RPWR
HPD
I2C
CEC
CH,BH,AH
AVS,AHS
I2C
B3P
SV3P
A2P
C4P
COMPOSITE VIDEO OUTPUT
TX-SA578/578V/608 TX-SR308/508/578/608 HT-R280/380/538/580/680/980/C230/C260 DTR-20.2/30.2
H I
TX-SR308, TX-SR508, HT-R280, HT-R380, HT-R538, HT-R580, HT-RC230
CEC
TX-SR508, HT-R580
TMDS
TMDS
CEC
CEC
DDC
DDC
HDMI IN4
RPWR
+5V
HPD
+5V Hot Plug HP DET
Q8401
TMDS TMDS
SII9136 TMDS TMDS
CEC
CEC CEC
12bit x3 DDC DDC
DDC DDC
TTL Tx HDMI OUT HDMI IN3
RPWR
+5V +5V
HDMI HPD HPD
HP DET HP DET
Tx
TMDS
TMDS
CEC
CEC
DDC
DDC
HDMI IN2
RPWR
+5V
HPD
HP DET
TMDS
TMDS
CEC
CEC
DDC
DDC
HDMI IN1
RPWR
+5V
HPD
HP DET
1 8
2 9
3 10
4 11
D4 OUT
5 12
6 13
7 14
Y
COMPONENT
CB
OUT
CR
MONITOR
VCR/DVR
J K
CEC
I2C
Rx Port A
+5V Hot Plug
TMDS
TMDS
CEC
DDC
DDC
Rx Port B Tx HDMI OUT
+5V
HPD
Q8101
HP DET
ADV7623
HDMI 4Rx Tx
Rx Port C
Rx Port D