Need IO-4550 Schematic and/or parts

[Dave]

I have an IO-4550 oscilloscope that recently malfunctioned.

Can anyone help with a schematic copy or a circuit board from a parts unit ?

A bolt that supports the CRT rear came loose, dropping down onto the HV 
circuit board below.  The 100k trimmer for the high voltage level and 
the 82k resistor next to it are fried.   One transistor right below the 
bolt seems like it got zapped (everything measures 0 ohms on it), and 
there may be other problems I haven't found.

So - if you have a schematic and can send me a copy, please let me 
know.  I'd be happy to cover copying and mailing costs.  I'd also love 
to get calibration instructions, but that's low on the list.

Also, if anyone has a parts unit and would like to sell the HV board 
(the one on the bottom of the unit, in back next to the transformer) let 
me know your price.

Thanks,

  - Dave
 W6OT



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