P- G.5.2 Symptom Still Present/Isolate Functional/Power Logic Board Devices; Card Cage / Functional And Power Logic Board Devices - Fresenius Medical Care 2008K2 Troubleshooting Manual

P- G.5.2 SYMPTOM STILL PRESENT / ISOLATE FUNCTIONAL / POWER LOGIC BOARD DEVICES
IMPORTANT! The machine MUST be OFF to prevent damage!
a)
Per the Figure below
b)
boards will be unplugged next. To prevent damage when eventually returning them, RECORD where
they belong BEFORE continuing to part c!
c) Unplug the cables but
screen)!
ENSURE the meter's black lead remains connected to chassis ground!
d)
IMPORTANT!
e) Turn the machine on (fan running)! If possible, return to Dialysis Program OR Heat
Disinfect.
f) Re-measure +12 and / or +5 volts (within range now?). If the symptom was intermittent call debug
screen 1 to watch 5V Est and / or 12V Est. Allowing sufficient time, does the symptom you were
troubleshooting reoccur?
Yes Symptom reoccurs! Proceed to
No Screen on and /or good voltages! To locate the bad device, perform parts A THROUGH E next
page:
Figure 117 – Card Cage / Functional and Power Logic Board Devices
, device cables along the TOP EDGE of the Functional AND Power Logic
DO NOT
unplug the Power Logic board's front cable (cable closest to the
page 613
2008K/K2 Troubleshooting Guide
P/N 507298 Rev. H
, procedure number P- G.5.4.
Page 611