Heath IO-4550 Oscope Help needed.

[Carl Hyde]

I picked up an otherwise good looking IO-4550 scope
recently. It had not been used for a few years and
when I put it on my bench a few days ago and gave it
the smoke test (turned it on) sure enough it smoked. I
opened it up and there is a burned component which I
think is a resistor on the circuit board that is
mounted on the left side of the chassis. The volts/cm
controls on the left side of the front panel are
mounted on this board.  The part number of the board
is 85-1989-2. I need a manual copy or a manual or just
the board diagram and schematic of that board so that
I can replace the component. Its too fried to read the
color bands so it could be a resistor or an inductor.
Any help would be apreciated.

=====
Carl S.HYDE
W2CSH
cshyde at yahoo.com
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