FAQs
How do I prevent ground fault System Troubles when installing Gemini C-Series (GEMC) power supply PC boards?
Note that the GEMC-PS24V7A or GEMC-PS24V4A power supply boards are mounted inside the enclosure under the control panel motherboard, and therefore must be the first board installed in the enclosure.
Ensure the continuously-powered 120VAC source circuit breaker is turned off and all batteries are disconnected before proceeding.
- Ensure the power supply fishpaper barrier (item 11 in the illustration above) is situated below the four pre-installed male standoffs inside the Enclosure Base. This fishpaper provides an electrical barrier for the power supply board and MUST be installed.
- Install the four male/female standoffs (item 9), securing the fishpaper. Also install the spacer (item 12) as shown.
- Place the power supply board over the four male/female standoffs (item 9) and secure the board with two locking kep nuts provided (item 5) IN THESE LOCATIONS ONLY.
- Install the two long brass standoffs (item 10) into the upper and lower right male/female standoffs (item 9) as shown. IMPORTANT! DO NOT USE KEP NUTS (STAR WASHERS) DIRECTLY ON THE PC BOARD! USE THE TWO LONG BRASS STANDOFFS AS SHOWN!
- Install the Power Supply Shield (item 7). The keyed holes in the shield (see image) allow you to place the shield over the two existing 6-32 screws (item 6) without removing them. The screws are pre-installed into the Left and Right Side Plates (items 4 & 2). Loosen and re-tighten to secure. Be sure "Notch" (see image below) is installed to the right.
Note: Some items are pre-installed at the factory. To ensure all hardware and component mounting holes are suitably aligned, loosen and re-tighten all pre-installed screws as needed. Also note that the physical power supply used in your installation may differ slightly in appearance from the image of the power supply shown.
"Keyed" holes in the HW1764 Power Supply Shield (arrows). Note location of "Notch".