Service manual

26
VSX-918V-K
1
2 3 4
A
B
C
D
E
F
1
2 3 4
4.7 USB BLOCK DIAGRAM
CN401
CN2
BUS Power cnt.
CTL
USB POWER
XFLAG
Protection flag
CN3
IC461
64M
SDRAM
IC401
USB Host
TCC8600
IC481
Apple
Certification IC
X’tal
12 MHz
D+
CP_RDY
S/PDIF
XRST
XRST
USB_DAI
USB_DAO
DSP part
V3.3D
V5USB
V5 Receiver
+5V
V+3DU
D-
CP_DATA
CP_CK
V1.8D
I/O
Internal Core
IC462
16M
FLASH ROM
V+3DU
IC471
LOAD
SW IC
System
Control
CPU
IC402
1.8V REG
V+1R8U
5 -> 3
R455, R456
USB_DAI
5 -> 3
TC74VHC08FTS
USB_DAO
3 -> 5
TC74VHCT541AFTS
V+3DU
V5DU
V3D (DSP)
Q401
IC331
IC351
X’tal
32.768 KHz
Block Diagram (USB portion)
B
V
HDMI&DSP&USB ASSY
(VSX-918V:AWX8977)
DSP&USB ASSY
(VSX-818V : AWX9164)