Anrtsu MS710a 23GHz Spectrum Analyzer schematic, manual .. repairs ...

[rickells]

hi,

Recently acquired  Anritsu MS710a powers on fine, but no legitimate I/P signal is displayed.
All other functions appear to work, including the internal calibrator signal when tested with a friends SA; including test RF signals(on friends unit).

Wondering if the I/P diodes or amp has been blown ?
Any hints about possible repairs, & schematics ?

Kind of hard to know where to start (disassembly, and PCB identification !) without literature, but the RF/IF stages should look familiar...

thank you

[Simon]

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