User manual

Model 2701 Service Manual Troubleshooting 4-7
Figure 4-2
Digital circuitry block diagram
O
P
T
O
I
S
O
U150
U155
U175
Main Processor
MCF5407
U1
XADTX
XADCLK
XADTS
XADRX
ADTX
ADCLK
ADTS
ADRXB
Analog
Circuitry
(See Figure 4-3)
Display Board
Controller
U401
Display
DS401
Flash
Memory
U6
SDRAM
U3
50 MHz
XTAL
Y1
RS-232
U15
RS-232
Port
Ethernet
Interface
U12
10/100 BaseT
Ethernet Port
Keypad
Slot
Control
Battery
Control/
Charger
U4, U16
U13
U21
U22
Digital I/O
U23, U24
Digital I/O
Port
Li Ion
Battery
FPGA
U9
Trigger Link
U14, U20
Trigger
Link
Connector
Ethernet Processor
NET + ARM
U10
SDRAM
U11
RX
TX
IN
OUT
Real Time
Clock
U7