Home
About Us
Products
Tech Tips
Tech Articles
Gallery
Contact Us
Downloads
Links
home>>Tech tips>>technical tip #2
Marquee Power Supply Removal
We recommend annual removal of the low voltage power supply for the purpose of cleaning dust from inside of it, using a shop vac or canned compressed air; this allows for proper heat dissipation and extends the life of the LVPS. Also, those wishing to obtain E-Tech's proprietary Fan Noise Reduction Mod will want to pull out the LVPS for shipment.
To remove the LVPS, the lower front grill must be removed, it is held in place with four phillips screws (see PIC 1). The grill can be pulled away to reveal (see PIC 2) the LVPS on the left, (it is the larger of the two metal boxes and features the power cord socket on its' front), and the high voltage power supply on the right. The LVPS is secured to the frame with two more phillips screws (see PIC 3). With screws removed, the LVPS can be pulled forward out of its' bulkhead Amphenol connector (see PIC 5), there are no loose wires to contend with. We also advise cleaning dust out of the compartment and the connector itself using compressed air or a small brush. The LVPS can be flapped open upon removal of three small screws that hold it together; take care to open it slowly as there are wire harnesses connecting the top and bottom circuit boards inside. To reinstall the LVPS merely seat it into its' bulkhead connector, there are guide pins in place to help that, and reinstall the screws and front grill. The high voltage power supply is similarly removed and requires disconnection of the red anode feed cable from the high voltage splitter block which is found on top of the green tube inside the main cover. Do seat the anode connectors firmly until they click into place, a pair of large needlenose pliers are advised for that task.

click here for larger image

click here for larger image

click here for larger image

click here for larger image

click here for larger image
Note: Those wishing to obtain our Fan Noise Mod need to e.mail me for details at ehometech@earthlink.net or call 480 368 7434 and ask for Tim. The mod includes test and repair of the dreaded Filament Overvoltage problem which can quickly destroy a set of CRTs; see our Gray Scale Tech Tip for more info.
home: about us: products: tech tips: tech articles: gallery: contact us: downloads: links