Tweco 151 with SL100SV User Manual
Page 109
Manual 0-4691
5-41
SERVICE
5
E. 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 Output 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 replacement 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 thermal pad.
Output PC Board
Thermal Pads
Output Diodes
Art # A-04639
Heatsink
7. Use isopropyl alcohol to clean the large flat surface on the back of the component.
8. Secure replacement board as follows:
a. Position the hardware at the bottom of a recess in the face of the diode. Ensure that the washer is under the head of
the screw(s).
b. Torque hardware to 35 in-lb. (3.95 Nm).
NOTE
Failure to torque properly will cause component damage.