P- 1.1.0 Isolate Power Logic Board Cable (Pin 4) - Fresenius Medical Care 2008K2 Troubleshooting Manual

P- 1.1.0 ISOLATE POWER LOGIC BOARD CABLE (PIN 4)

a) Turn the machine off and UNPLUG it. CAUTION!
Electrocution hazard if not unplugged!
b) Slide the power supply away from the cabinet to see
the Power Control Board inside.
c) ENSURE ALL cables are plugged in securely. If
not, this may be the problem!
d) Figure right, un-mount the board from its white
plastic clips.
e) Remove the two front screws and lay the rear
power supplies panel down to access to the rear
(solder) side of the X2 cable.
IMPORTANT!
f) Plug the machine in!
Per the Figures
g)
pin 4
connector, at
Yes More than 10.0 volts! TWO (2) possible bad components: 1) 20 pin Power Logic ribbon
cable (X2) OR; 2) Power Control board.
No Less than 10 volts! See procedure number
CAUTION!
below
, measure at the rear (solder) side of the Power Control board's X2
(BOTTOM row, SECOND pin from the left). More than 10.0 volts DC?
Figure 126 – Power Control Board Solder Side
2008K/K2 Troubleshooting Guide
P/N 507298 Rev. H
High voltage now present!
P- 1.2.0 (page 635).
Page 634