Pioneer PDP-4271KUCXC Manual de servicio - Página 12
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2.2 HNM BLOCK DIAGRAM
• HNM Ass'y Block Diagram
Classification of each component
A
IC, memory, regulator and so on
IC xxxx
CN (JA) xxxx
Connector to outside of the ass'y
xx MHz
X'tal or oscillator
X'tal
USB block
+5V for USB Bus-power
*CN7802
* Or, a wire is soldered
B
directly to IC7803.
Connector to Main Ass'y
CN7851
C
Reset
IC7852
TC7S00F
[NAND]
I/O block
+5V for Power supply
CN7901
D
Power supply block
12
1
2
to USB Receptacle Connector
CN7801
IC7803
L7801
+5V
R5520H001B
ATH7015-
[USB High-side
[C. mode filter]
Switch]
USB Differencial
24MHz
X'tal
IC7801
VT6212L-G
[USB Controller]
Reset
IC7857
TC74LCX125
[3-state Buffer]
IC7851
PST596IN
TC74LCX04
[Reset IC]
[Inverter]
+5.0V
+3.3V
IC7903
LTC3412EFE
[SW Reg. IC]
2
3
Differential signal
Host controll signal
Power supply
PCI clock
block
X7851
ASS1211-
[33MHz OSC]
PCI clock
IC7855
CY2305SC-1H
[Clock Buffer]
signal
PCI bus
IC7601
EM8620L-LFC
[Digital Media Processor]
Tx / Rx
Reset
IC7852
+2.5V
+1.2V
IC7902
IC7904
LTC3412EFE
NJM2846DL3-25
[Regulator IC]
[SW Reg. IC]
PRO-940HD
3
4
Bus signal
Other digital signal
RJ-45 Ethernet Connector
JA7752
AKP1307-
Rx
Tx
IC7751
TC74LCX125
[3-state Buffer]
25MHz
X'tal
IC7754
RTL8100CL-LF
[Ethernet Controller]
Reset
IC7701
8620 block
EDD2516AKTA-6B
[DDR-SDRAM (256Mbit)]
Memory bus
Peripheral bus
27MHz
X'tal
IC7703
AGC1027-A-PI
(S29GL128N90TFIR2)
[Flash Memory (128Mbit)]
Reset
-5.0V
IC7901
LM2664M6X
[Converter IC]
4
Ethernet block
IC7753
BR93L46RFJ-W
[EEPROM (1kbit)]
IC7702
EDD2516AKTA-6B
[DDR-SDRAM (256Mbit)]
DDR block