Charles, >From page 34 of the KPA1500 manual: LCD Message Fault LPF VMON Incorrect bias voltages at the TR switch. Fault Type Hard
73, Mark, WB9CIF -----Original Message----- From: elecraft-boun...@mailman.qth.net <elecraft-boun...@mailman.qth.net> On Behalf Of charles respess Sent: Friday, October 21, 2022 07:38 To: elecraft@mailman.qth.net Subject: [Elecraft] KPA1500 Fault:LPF VMON Hello, Does anyone know how to troubleshoot KPA1500 Fault:LPF VMON? Amplifier powers up fine into standby mode, however any attempt to change into operate mode causes this hard fault condition 'Fault:LPF VMON'. I searched archives but found no details on how to troubleshoot. Charles ______________________________________________________________ Elecraft mailing list Home: https://nam12.safelinks.protection.outlook.com/?url=http%3A%2F%2Fmailman.qth.net%2Fmailman%2Flistinfo%2Felecraft&data=05%7C01%7C%7Ce8f9a1a390e946ae707308dab33772dc%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C638019347985584762%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=bKS2PwAdwMyDsNxQJGE0Q%2BeZ%2BQwHtMygD0DeY%2FS3Jqo%3D&reserved=0 Help: https://nam12.safelinks.protection.outlook.com/?url=http%3A%2F%2Fmailman.qth.net%2Fmmfaq.htm&data=05%7C01%7C%7Ce8f9a1a390e946ae707308dab33772dc%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C638019347985584762%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=fZ%2FLDTp4RBA6I3loW1DA3%2F2FjwHJi8VaVAq4DhQQR7M%3D&reserved=0 Post: mailto:Elecraft@mailman.qth.net This list hosted by: https://nam12.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.qsl.net%2F&data=05%7C01%7C%7Ce8f9a1a390e946ae707308dab33772dc%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C638019347985584762%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=1KJ%2FZ7tBEses7ZTTAATzKph3oKSY%2FjChosE0v%2B%2BnzUw%3D&reserved=0 Please help support this email list: https://nam12.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.qsl.net%2Fdonate.html&data=05%7C01%7C%7Ce8f9a1a390e946ae707308dab33772dc%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C638019347985584762%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=D8r05LocdpPArgDb1O34NfjdoxWLitR%2FeOm%2BXloQwPs%3D&reserved=0 Message delivered to markmus...@outlook.com ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
