CUSTOMER/OPERATOR SERVICE 68 Manual 0-2470
Disconnect the primary coil (J18 ) of the HF transformer and
check for approximately 300VDC on the output connector to the
torch (positive and negative). If 300VDC is present, check torch
and leads for open. If not, then send unit to an authorized service
station.
Before reassembling the power supply enclosure, check that all
wire harnesses and ribbon cables fit into the notches in the edge
of the top and middle panels so that wires don’t get pinched.
1. With the unit in an upright position, tip the unit so that one of
the case halves may be slid onto the chassis. Then lift the unit
and set it down on the side with the case half down.
2. Before installing the other case half, make sure the edges of
the bottom, middle, and top chassis panels are fully inserted
into the slots in the case. Look for gaps between the front and
rear panels and the edge of the case, and look into the case to
see that the notches in the top corners of the front and rear
panels are flush against the plastic stops of the case. It may
take some lifting and re-settling of the chassis to get this all
lined up.
3. Once the chassis is properly aligned in one case half, gently
lower the other half onto the other side of the chassis by
tipping it slightly so that the top is slightly lower than the
bottom. Then push and gently tap down until the two case
halves are within l/16 inch. (If you have trouble getting the
case halves close enough, remove the top half and check to
see that the bottom half is fully engaged and that there are no
wires out of place on the top and middle panels.
4. Install the eight screws, lockwashers and nuts to finish the
assembly.
5.08 SERVICE PROCEDURES (continued)
DC Output Check
Reassembling the
Enclosure
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