Wd- 1.0.1 Isolate Control Signal; Wd- 1.0.3 Isolate The Power Logic Board - Fresenius Medical Care 2008K2 Troubleshooting Manual

WD- 1.0.1 ISOLATE CONTROL SIGNAL

a) Per the Figure below, locate IC2 at the top edge of the Power Logic Board.
b) Under IC2 are three resistors, top to bottom R8, R9 and
c) Measure at the RIGHT side of
1) IF (and ONLY if) 3.6 volts DC or more: The Functional Board is bad (to locate the board refer to
Figure 4A, page 9)).
2) IF less than 3.6 volts DC: See procedure number

WD- 1.0.3 ISOLATE THE POWER LOGIC BOARD

a) Turn the machine OFF and swap in a known good Power Logic Board (to LOCATE the board refer to
Figure 4A, page 9).
b) Turn the machine on. TWO (2) possible scenarios:
1)
IF "WD: Fail Long Pulse" OR "WD: Fail Short Pulse" does NOT reoccur: Turn the machine off
and on several times, allowing 40 seconds in between, as the problem may be intermittent! If it
does not reoccur the new Power Logic Board fixed the problem.
2) IF "WD: Fail Long Pulse" OR "WD: Fail Short Pulse" REOCCURS:: Perform parts a THROUGH d
below:
a) Turn the machine OFF! The previous Power Logic Board is probably okay!
Parts b through d next page
Figure 108 – Power Logic Board / R10
R10
, at the location shown in
2008K/K2 Troubleshooting Guide
P/N 507298 Rev. H
R10
.
Figure 108. TWO (2) possible scenarios:
WD- 1.0.3 (page 572).
Page 572