Pioneer VSX-2016AV-S Service Manual page 229

5
Block Diagram of the USB Assy
AL
USB ASSY
V+3R3
I/O
CN701
V5USB
1
To
D-
D-
2
USB
D+
connector
D+
3
GND
4
V+3R3
IC761
SDRAM
Main parts
TCC760HC01-AG
16M FLASH ROM
64M SDRAM
LOAD SWITCH
2ch DAC
5
6
IC771
LOAD
SW IC
V+1R8
IC702
1.8V
REG.
BUS Power cnt.
V+1R8
Protection flag
XRST
Internal
USCS
Core
USDAI
HREQ
USCLK
IC701
USDAO
USB Host
TREQ
TCC760HC01-AG
XMUTE
DA_CS
DAC_SCK
DAC_SD
I2S
V+3R3
IC762
64M 16M
FLASH ROM
Purpose
: USB Host control decoder (MP3/WMA/MPEG-4AAC)
: Firmware is stored
: Temporary storage area of decoding music file
: Current limitation to USB device power
: D/A converter for analog output
6
7
V+5D
CN702
4
V+3R3
IC703
2
3.3V
REG.
14
15
5
IC953 9
5 → 3
10
12
7
IC951
11
3 → 5
13
IC781
L ch
Q784
3
2ch
MUTE
DAC R ch
Tr 1
VSX-2016AV-S
7
8
A
AUDIO IN
ASSY
CN516
V+5USB
V+5D
4
GNDA
2
CTL
14
XFLAG
15
XRST
5
USCS
System
9
USDAI
Control
10
HREQ
CPU
12
USCLK
7
USDAO
11
TREQ
13
LOUT
To
3
Analog input
ROUT
1
selector
8
A
B
C
D
E
F
229