Need Calibration/User manual for IO-4510 scope

[Charles W. Morehouse]

Alex,
Have restored lots of Heathkits.  A good rule with scopes is to replace 
all the resistors and caps in the HV circuit.  Then you can start to fix 
the other problems.
As for the manual, have always had excellent results with W7FG Vintage 
Manuals.  He has that one for $29.  His copies are very good.  Luck and 73.
wayne
W4GBW

Alex [Temple-Heath List] wrote:

> Greetings.
>
> Just acquired a IO-4510 which I'm now in the process of cleaning up 
> and restoring. After slowly raising the AC voltage with the variac 
> over the course of about two hours, I got to the point where I 
> realized that although I do get a single trace I have no control over 
> it other then the horizontal position, which almost manages to get the 
> trace centered on screen even though its fully clockwise. None of the 
> vertical position controls seem to work. Also, the focus control has 
> to be set fully clockwise too in order to get the best possible 
> sharpness of the trace, so I'm guessing there might be a couple of 
> resistors off value in the focus divider. The previous owner only 
> provided me with the assembly manual, but I'm missing the 
> calibration/user manual which I will obviously need to calibrate the 
> unit once I get it fully operational.
>
> Does anyone have a download source for this manual? I've checked the 
> usual places but no luck so far. If downloading it is not possible, 
> who would be a trusted source to buy the manual from?
>
> BTW, if anyone has any restoration/upgrade tips on this particular 
> model scope, they would also be very welcomed.
>
> Thanks.
> -Alex
>

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