SERHT50NA A0808 8-11
POWER SUPPLY BOARD REPLACEMENT
WARNING Before disassembly of parts on the inside of the
HT50 takes place, the HT50 power supply needs to be
discharged. See instructions on pg. 8-2.
WARNING Ensure that the HT50 is unplugged from the AC
po
wer source.
Refer to drawing Figure 9-1, Internal View.
The Power Supply Board should be replaced if the ventilator is
inoperable with either external A.C. or D.C. power.
1. Follow steps 1 through 3 of DISASSEMBLY (Lower Case)
section.
2. Remove the Filter Cover Assembly (8).
3. Remove the six (6) #10 torx screws (#5) securing the Power
Supply PCB to the ventilator housing.
NOTE: These screws are located externally on the right hand side
of the v
entilator. The two longer screws are used to secure the
black electrical socket inlet.
4. Disconnect the wiring harness from the Power Supply PCB by
pressing the release tab on the connector.
5. Remove and replace the old PCB with the new assembly.
6. Reverse steps 1 through 4 to reassemble.
SECTION 8
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