Fresenius Medical Care 2008K2 Troubleshooting Manual page 654

d) Open the power supply to see the Power Control board.
e) Figure below, ENSURE ALL cables are plugged in securely at the Power Control Board. If not, this is
may be the problem!
f) Check the Power Control board cables and wires for signs of burning or damage! This may be the
problem!
g) Check the board's component (front) and solder (rear) surfaces for signs of burning or damage. This
may be the problem!
h) Using compressed air, remove dust from the component and solder side of the Power Control board.
Excessive dust may be the problem!
i) Referring to Figure 132
screws are tight. If not tight this may be the problem!
j) If possible, turn the machine on (fan running) then, if possible, place it into Dialysis Program or Heat
Disinfect. Does the problem reoccur (Yes or No)?
Yes Problem reoccurs! Replace the power supply with a known good supply (P/N 190011) OR
repair with known good components. SIX (6) possible bad components: 1) Bad main
capacitor* (C1, 24,000 µF, P/N 361216-01); 2) Bad main bridge rectifier* (BR1, P/N 362009-
04); 3) Bad boot capacitor* (C2, 10 µF, P/N 361216-03); 4) Bad Power Control board* (P/N
190019); 5) Bad main transformer* (P/N 290030); 6) Bad motherboard**.
No Problem does NOT reoccur! Allow up to thirty (30) minutes as the problem may be intermittent.
An intermittent problem more than likely is a (FIVE (5) possible bad component): 1) Main
capacitor * (C1, 24,000 µF, P/N 361216-01) OR; 2) Main bridge rectifier* (BR1, P/N 362009-04)
OR; 3) Boot capacitor* (C2, 10 µF, P/N 361216-03) OR; 4) Bad motherboard**.
* To LOCATE these components refer to
** To LOCATE the motherboard refer to
(page 651), using a Phillips screw driver ensure that Capacitor C1's terminal
2008K/K2 Troubleshooting Guide
P/N 507298 Rev. H
Figure 132 (page 651)
Figure 6 (page 19)
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