Thermal Dynamics PAK Master 150XL, Service Manual

Page: 42 / 90

REPLACEMENT PROCEDURES 5-4 Manual 0-2728
E. Pot/LED PC Board Assembly Replacement
1. Turn the CURRENT adjustment fully counter
clockwise and note the location of the pointer on
the knob.
2. Loosen the screw securing the Current Knob to
the potentiometer shaft.
3. Remove the Current Knob.
4. Unlatch the Access Panel to gain access to the Pot/
LED PC Board.
5. Remove the Pot/LED PC Board from the four
standoffs.
6. Disconnect the wire harness on Pot/LED PC
Board.
7. Install the replacement Pot/LED PC Board by re-
versing the above procedure.
F. Access Panel Replacement
1. Turn the two Dzus studs 1/4 turn each to unlatch
Access Panel from Front Panel.
2. Lift Access Panel straight up then down until the
side hinges lock into place.
3. Disconnect the ground wire on the Access Panel.
4. Remove the following components from the Ac-
cess Panel by referring to :
• ON/OFF Switch per paragraph 5.05-B.
• RUN/SET Switch per paragraph 5.05-C.
• STANDARD/LATCH Switch per paragraph
5.05-D.
• Current Knob and Pot/LED PC Board per
paragraph 5.05-E.
5. To remove the Access Panel, lift up and pull
straight out to disengage the Access Panel side
hinges and remove the panel from the unit.
6. Install the replacement Access Panel by reversing
the above procedure.
5.06 Left Side Center Chassis Parts
Replacement
NOTE
Refer to Section 6.05 for parts list and overall de-
tail drawing.
A. Fuse (F1) Replacement
1. Remove power from unit.
2. Remove the Left Side Panel per Section 5.04-A.
3. Remove Fuse from the fuse holder.
4. Replace Fuse (5 amp, 600V).
5. Reinstall Left Side Panel.
B. Fuse Holder Replacement
1. Remove the Left Side Panel per Section 5.04-A.
2. Remove Fuse from Fuse Holder.
3. Disconnect two wires connected to Fuse Holder.
4. Remove the two small screws securing Fuse
Holder to the chassis.
5. Install the replacement Fuse Holder by reversing
the above procedure.