8-2 SERHT50NA A0808
ELECTRONIC & PNEUMATIC COMPONENT REMOVAL & REPLACEMENT
WARNING Before disassembly of parts on the inside of the
HT50 takes place, the HT50 power supply needs to be
discharged.
DISCHARGE THE HT50 POWER SUPPLY
NOTE: Refer to pg. 3-26, External Power Connector, for proper
connection of an external DC power source.
1. Connect a DC power source to the external power connector
on the HT50. Leave the external DC power source connected
to the HT50 for at least 10 seconds.
2. After 10 seconds has elapsed, remove the external power
source. Only after the HT50 power supply has been
discharged is it safe to remove components from the inside of
the HT50.
DISASSEMBLY (Lower Case)
1. Remove the 6 ea. #10 torx screws securing the lower case (1)
of the HT50 to the ventilator housing.
2. Remove the lower case cover, carefully avoiding tension on
the battery wire harness. Disconnect the 3 connectors at the
dual pack battery circuit board connecting the dual pack
battery circuit board to the main board. See figure 8-1.
3. To reinstall the lower case assembly reverse above steps.
Figure 8-1
Three connectors to
be disconnected
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