Fresenius Medical Care 4008 E Technical Manual page 494

Fig.: Block diagram P.C.B. LP 649-2 Display board
CS
WR
RD
A0
Chip-Select
A1
Decoding
A2
A3
A4
Key interrupt
Key matrix (Plug X2)
Data bus D0 – D7
Fresenius Medical Care
CS 1 – 12
Bargraph
Duty Art
Ven
Cycle
TMP
Conductivity
CS 16, 17
Status LED's
Traffic Light
CS 18
Alarm LED
Key click
CS 20
Keyboard
Encoding
CS 21
Brightness
Control
CS 22
Alpha
Display
CS 23
UF Goal
UF Time
UF Rate
UF Volume
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4008 4/09.03 (TM)
8.23.2 Circuit diagram and component layout diagram
P.C.B. LP 649-2 Display-Board
8-198
Fresenius Medical Care 4008 4/09.03 (TM)
P.C.B. LP 649-2
Component layout diagram