Cr- 1.0.2 Isolate Positive (+) 12 Volt Dc Supply - Fresenius Medical Care 2008K2 Troubleshooting Manual

e) Referring to the Figure below, locate the motherboard's nine (9) pin TEST Connector. Voltage
signals will be measured from here next.
f) See procedure number
CR- 1.0.2 ISOLATE POSITIVE (+)12 VOLT DC SUPPLY
IMPORTANT! Set your CALIBRATED volt meter to DC Voltage (V
A)
Connect the meter's black lead to chassis ground (see
B)
IMPORTANT!
C) Turn the machine on (Fan running)!
D) Measure at the TEST Connector's
-13.00 volts DC?
Yes Between -11.00 and -13.00 volts DC! See procedure number
No Is NOT between -11.00 and -13.00. Measure at the TEST Connector's positive +12V pin (pin
5, five pins from left). Between 11.75 and 12.25 volts?
CR- 1.0.2 (page 405).
Figure 64 – TEST Connector
negative -12V
Yes Between 11.75 and 12.25 volts! See procedure number
407).
No Less than 11.75 OR more than 12.25 volts! Proceed to
Table 17
to .
2008K/K2 Troubleshooting Guide
P/N 507298 Rev. H
Figure 2
pin (pin 4, four pins from left). Between -11.00 and
CR- 1.0.4
).
DC
(page 4)).
(page 406).
CR- 1.0.9 (page
page 599
and refer
Page 405