Alpha Technologies APB HFC Voltage Booster - Manual (Page 21)

21 016-559-B0-001 Rev. A
2.0 Installation, continued
2.11 Voltage Booster Service
Tools Required:
• No. 2 Phillips head screwdriver
2.11.1 PCB Replacement Procedure
1. Unplug Input Connector from J5 of the PCB.
2. Unplug Output Connector from J4 of the PCB.
3. Unplug XFMR Connector from J1 of the PCB.
4. Loosen captive bracket screws at "4" (2 places).
5. Remove assembly.
6. Install new assembly and tighten the captive bracket screws at "4" (2 places).
7. Plug XFMR Connector into J1 of the PCB.
8. Plug Output Connector into J4 of the PCB.
9. Plug Input Connector into J5 of the PCB.
10. Perform power up test (section 2.7.1), and fi nal assembly (section 2.8).
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There will be up to 90Vac present on the PCB when a live connector is plugged into the
input or output connectors.
WARNING!
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