Thermal Dynamics CUTMASTER 81, Руководство по обслуживанию

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Manual 0-2957 5-9 REPLACEMENT PROCEDURES
7. Remove two bolts per Fan. Set the Fan(s) aside.
8. Install the replacement Fan Assembly as follows:
a. Fasten Fan(s) in position with the wiring con-
nectors at the bottom of the Fan(s).
NOTE
Only two screws are needed to attach the Fan to
the Fan Panel. They can be installed in any two
holes provided they are opposite each other. For
grounding purposes, one of those screws must be
installed with a star washer.
b. Place the Fan Assembly Panel in position in
the Power Supply.
1. The inner edge of the Panel has tabs that
engage slots in the center chassis. Ensure
that these tabs fully engage in the chassis.
2. Press the Panel downward. Press the bot-
tom flange fully against the bottom panel
of the Power Supply.
3. Ensure that the hole in the bottom flange
of the Fan Assembly Panel engages the
mounting stud.
c. Replace nut on the bottom mounting stud.
d. Ensure that the Fan Panel's top flange is fully
against the top forward edge of the Heatsink
Shroud.
e. Press the front panel of the Power Supply
against the Fan Panel, and fasten in place with
the bolt removed in Step 2.
f. Secure the nut on the stud at the bottom of the
Fan Panel.
9. Re-connect the wires to the Fan Assemblies.
10. Pass the Work Cable through the hole in the bot-
tom of the Fan Panel. Ensure that the grommet is
in place in the hole.
11. Connect the Work Cable to terminal E61 on the
Power Output PC Board. Secure the Work Cable
Strain Relief.
12. Re-install the Power Supply Cover.
D. Output Diode PC Board Replacement
Follow the antistatic procedures in subsection 5.02.
1. Remove cover per subsection 5.04-A.
2. Locate the Output Diode PCB(s) located within the
Output Power PC Board on the right side of the
power supply.
3. Carefully remove all wire connections to the Out-
put Diode Board(s).
4. Remove screw(s) securing Output Diode PC
Board(s) to the Heatsink and remove board(s)
from the Power Supply.
5. Use isopropyl alcohol and a clean rag to clean the
heatsink. Do not scratch or abrade the heatsink.
6. Apply the thermal pad provided with the replace-
ment PCB to the heatsink. Secure in place with
small pieces of masking tape. The tape must cover
no more than 1/4" (6 mm) of the edge of the ther-
mal pad.
Washer
Screw
Output Diode
or IGBT
Round
Thermal Pad
Art # A-03702
Tape
Tape
7. Use isopropyl alcohol to clean the large flat sur-
face on the back of the component.
8. Secure replacement board as follows:
a. Position the hardware at the bottom of a re-
cess in the face of the diode. Ensure that the
washer is under the head of the screw(s).
b. Torque hardware to 17 in-lb. (1.9 Nm).
NOTE
Failure to torque properly will cause component
damage.