P- 1.0.3 Pin 4 Is Not Between 4.0 And 6.0 Volts - Fresenius Medical Care 2008K2 Troubleshooting Manual

P- 1.0.3 PIN 4 IS NOT BETWEEN 4.0 AND 6.0 VOLTS

a) Figure right, unplug the sixteen (16) pin Switch Matrix
Cable.
b) Figure right, measure again at
and 6.0 volts DC now (Yes or No)?
Yes Between 4.0 and 6.0 volts! Replace the
front panel. The Power button is shorted.
No IS NOT between 4.0 and 6.0 volts! See parts A AND B below:
A) Plug the 16 pin Switch Matrix Cable into the male pins on the Front Panel Interface board.
B) Four (4) possible bad components. One at a time, referring to the Component List below,
swap in each then, in between, measure at the Switch Matrix Cable's
4.0 and 6.0 volts is measured the last component swapped in is the problem
Component List: 1) 24 pin Front Panel Data Cable*; 2) Power Logic Board (card cage, first
board from the left); 3) Front Panel Interface Board*; 4) Motherboard*.
* To LOCATE these components refer to Figure 121 (page 629)
pin 4
. Between 4.0
LEFT BLANK INTENTIONALLY
2008K/K2 Troubleshooting Guide
P/N 507298 Rev. H
Figure 122
pin 4
. When between
.
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