Tim, The XTL2500 Control Head is so complex that it has its own Detailed Service Manual, crammed with dozens of foldout schematic diagrams in its 224 pages. Order publication 6871771L01, about $45. The XTL2500 Basic Service Manual is 6816532H01, about $20, and the XTL2500 Detailed Service Manual is 6816533H01, about $25.
73, Eric Lemmon WB6FLY -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Tim Ahrens Sent: Wednesday, December 16, 2009 6:35 PM To: [email protected] Subject: RE: [Repeater-Builder] XTL2500 Control Head Contrast Hi Eric, Apparently that feature is not available. I've done enough LCD work to know about biasing, etc, so I might dig into the control head & do some measurements. Would be helpful if I had a schematic of the head tho! Thanks, Tim

