Fresenius Medical Care 2008K Troubleshooting Manual page 111

e) Referring to Figure 47
Pin 2, at the Power Logic Board's end (top row, first pin from rear)
Pin 2 at the Power Control Board's end (bottom row, first pin from the left).
f) Is the meter's numeric AND units display indicating 2
Yes Unplug the machine and replace the power control board (inside
the power supply).
No Unplug the machine and replace the power logic cable.
Figure 47 – Power Control Board / Power Logic Board
T- 2.6.0 CHECK THE POWER LOGIC BOARD CABLE (X2)
This procedure checks power logic cable resistance ( ) from one end to the other specifically at pins 6 and
7. A good cable measures 2
a) Turn the machine off and UNPLUG it. CAUTION!
Electrocution hazard if not unplugged!
b) Referring to the Figure (right) lay the power supply
rear panel down to access the rear (solder) side of the
power control board.
c) The X2 cable runs between the power control and the
power logic board. ASSURE it is plugged in
securely at both ends.
d) Touch the meter leads together and subtract the
meter's resistance ( ) reading from ALL subsequent
readings.
e) Referring to Figure 47
BETWEEN (two measurements, pin 6 and pin 7):
(page 109), measure resistance at the rear (solder) between:
AND
or less:
(page 109), measure resistance
Fresenius 2008K Troubleshooting Guide
P/N 507298 Rev. B (Draft 1)
Section 4 – Temperature Problems
or less?
Page 109