[TenTec] A CENTURY 22

[Dave]

Good morning all,
                         As the local techie I have been asked by an older member of our radio club to "have a look" at his Century 22, which has ceased to transmit. He does't have a circuit diagram and all my searches on the internet have drawn a blank.I can't believe a company like Ten Tec would not include a diagram on despatch so I wonder if anyone could help me out.
Regards
Dave...G4DAX