[SOLVED] Fluke/Philips oscilloscope eprom problem

[ScopeGuy]

Hello I am trying to find the eprom or the firmware ,for a Fluke/Philips PM3335 oscilloscope .This is about 20 years old ,and the eprom is completely blank .
I have looked but ,Philips only have downloads for recent consumer products ,nothing for the test gear they used to make .
I have an eprom programer ,so if anyone knows where I can get the files I would be very grateful .

ScopeGuy

 

[karesz]

Hi ScopeGuy,
maybe its helpful for you? :smile:
K.

 

[ScopeGuy]

Cheers Karesz ,I have looked for months to find this !
You are the best !
I will program my eprom tonight .

Scopeguy:-D

 

[karesz]

Hi friend,

No, I did find it "only" randomly short times befor_be lucky with it!
K.

 

[ScopeGuy]

Hello ,I have now been given a copy of this scopes software v4.1 .
This is different to the the eprom I have which says v 5.0 .

The scope still did not work however ,as I then found the eprom was faulty .
A replacement 27256 did not work ,and after a lot of wrong gueses,I found
the replacement eprom had become faulty also .

A helpful engineer told me the power supply board gives a lot of problems ,
and to change all 15 axial blue electrolytics .

After doing this and programing another 27256 ,I was now presented with the LCD
screen display flashing all segments followed by what I think is the default settings.
The crt now gives a very broad line display .

The problem now is none of the front panel buttons work !
The adjustable controls Y position etc work ,I can move the trace up and down ,side to side
just none of the switches to set ranges work .

After changing D9014 ram to no effect ,I think the problem is either the 8032 cpu or the
software is not compatible .

Philips made several versions of this scope which is causing me too much trouble.

Here is to the New Year