Advanced Instruments 3900, Service Manual

Page: 48 / 184

39P340 Rev2
(4C35/3905 Service Manual)
Page 2 of 2
shroud into halves. Remove each half
separately.
4. Support the bottom of the cooling assembly
while removing the three retaining screws
from the top of the deck (J).
5. Remove the cable clamp retaining screw
from the heatsink.
6. Disconnect the block probe cable (H)
from the main control board (I) and
remove all cable ties attached to the block
probe cable.
7. Remove the block probe cable from the
cooling assembly.
8. Insert thermal grease into the block probe
hole and insert the probe end of the new
cable into the hole until it will not go any
further.
Insert slowly so that the probe
is not damaged , allowing the thermal
grease to be displaced by the probe.
9. Note the block bin number located on the
block probe cable.
10. Reassemble the instrument by reversing
steps 1-6.
11. Set the new block bin number and
recalibrate the instrument.
C
D
H
I
J