Fresenius Medical Care 2008K Troubleshooting Manual page 10

NOTE A
1 – Mother Board
Combination Actuator/Test Board
NOTES A, B AND C
A Machines produced in 2007 and later may be equipped with the New Style
Motherboard. Referring to
the machine is equipped with (i.e. old or new style) note the location of the
DISPLAY connector (X). Also, the New Style Motherboard has an empty 8-pin
socket (Y) mounted in front of the actuator board (see Figure right).
B -12 volts DC is required for the Sensor Board's conductivity circuits and the optional Internal Blood
Pressure (COLIN) Module. Referring to
Power Logic Board a separate '+12 to -12 volt Convertor Board' is used. This miniature circuit board
plugs into the motherboard's 9-pin TEST Connector (#2). If equipped with the new style Power Logic
Board (released in 2008) the -12 volt supply is incorporated into the board and the Convertor board is
NOT necessary (i.e. the TEST connector is empty). Both the old and new style Power Logic Boards
are compatible with all K machines but CAUTION must be exercised. If an old style Power Logic Board
is placed into a machine equipped with the new style Power Logic Board the Convertor board MUST
ALSO be installed otherwise a "Cond Ref" or "Cond Offset" error occurs. If a new style Power Logic
Board is placed into a machine equipped with the old style Power Logic Board the Convertor board
MUST be removed!
; 2 – Test Connector (9 pins); 3 – Power Logic Board
NOTE C
; 5 – Function Board; 6 – Test Board
Figure 4A – Card Cage
:
Figure 4A (page 8), to determine which motherboard
Figure 4B
Fresenius 2008K Troubleshooting Guide
P/N 507298 Rev. B (Draft 1)
(page 9), if the machine is equipped with the old style
NOTE B
; 4 – Actuator or
NOTE C
; 7 – Sensor Board
Page 8