[NLRS] T E Systems 4412G schematic ?

[Melvyn Larson]

The subject amplifiers pre-amp function has quit working. Neither RF sensing or
front panel manual swithch will activate pre-amplifier. Called TE systems andDave said they don't have schematics for that model, their Engineers jus tknow how to build and repair them. This would never pass ISO 9000 documentedprocess requirements. Guess next step is to remove amplifier from truck and see if I can get the coversoff and find the relay activation circuit parts. May try to bring it to breakfast Saturday. Mel KC0P/R 
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