[Elecraft] KPA1500 Fault:LPF VMON

[Mark Musick]

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-bounces at mailman.qth.net <elecraft-bounces at mailman.qth.net> On Behalf Of charles respess
Sent: Friday, October 21, 2022 07:38
To: elecraft at 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
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