Fresenius Medical Care 2008K Troubleshooting Manual page 107

T- 2.1.0 CHECK SENSOR BOARD SIGNAL
a) Referring to Figure 45
turn 90 degrees downward and plugs into the motherboard connector. This is the "C" row, numbered 1
through 32 (from front-to-rear) Using a regular meter probe (do NOT use TP 80)!
Figure 45 – Electronic Card Cage (Sensor Board, Pin C1)
b) CAREFULLY measure DC voltage at pin C1 (very front motherboard pin). Do not to contact adjacent
pins! Proceed accordingly:
9.6 or greater: See procedure number
Between 3.7 and 5.5: Assure you are not contacting adjacent pin C2
3.6 or lower: Replace the power logic board (see
T- 2.1.1 CHECK NTC #2 CIRCUIT
a) Turn the machine off! Swap in a known good power logic board (see
b) Place the machine into Dialysis program (remember to press the 'CONFIRM' key).
c) Measure DC voltage again at the sensor boards motherboard pin C1. Proceed accordingly:
9.6 or greater:
105).
Between 3.7 and 9.5: Assure you are not contacting adjacent pin C2.
3.6 or lower:
T- 2.1.2 CHECK SENSOR BOARD
a) Return NTC #2 to distribution board position "CON-NTC" (
b) Turn the machine off and swap in a known good sensor board (see
c) From Service Mode, select Calibrate Sensors
the external meter to 37° C?
Yes The previous sensor board is bad. Perform all calibrations per procedure.
No Perform
(page 105), at the bottom of the sensor board a row of pins extend horizontally,
The previous power logic board is good. See procedure number
The previous power logic board is bad. Return NTC #2 to distribution board
position "CON-NTC" (
normal after eight minutes.
INITIAL CHECKS (page 6). The distribution board may be bad.
Fresenius 2008K Troubleshooting Guide
P/N 507298 Rev. B (Draft 1)
T- 2.1.1 (page 105)
Figure 4A and NOTE B, page 8).
st
1
position from the left). Temperature should become
st
1
position from the left).
Figure
Temp Control. Are you able to adjust Temperature on
Section 4 – Temperature Problems
Figure 4A and NOTE B, page 8).
T- 2.1.2
4A, page 8).
(page
Page 105