Tektronix TDS500-C/D Mono to TDS700-C/D Color Conversion

[strick]

Hi,
I'm attempting to convert a couple of TDS540C CPU boards to color and use the standard Tektronix Nucolor display (the CRT with shutter and HV module).  This thread https://www.eevblog.com/forum/repair/conversion-tektronix-tds500-to-tds700-color-oscilloscope/ discusses adding the missing ram and changing a resistor, but assumes that one will use a 3rd party lcd display using the external VGA port.

However, in one section, a user (PerpetualWalnut) did this same conversion (e.g. 540 to full 754), but only gives a few clues to some of the parts required.  He shows the top and bottom of the board (enclosures 1 & 2), but fails to mention the resistor values on the bottom.  Enclosure 3 shows the bottom of a TDS784D board that I bought, but someone had removed the two resistors in the bottom left (circled).  The other resistors that are replaced (shown in enclosures 2 and 3) are all 1002 (10K).

Could someone please take a look at their TDS754/784 C or D CPU board and inform let us know the values?

thanks,
Strick

[strick]

The board only let me post one picture.  here is the second.

[strick]

and the Third, showing the two resistors removed...

[Tantratron]

However, in one section, a user (PerpetualWalnut) did this same conversion (e.g. 540 to full 754), but only gives a few clues to some of the parts required.  He shows the top and bottom of the board (enclosures 1 & 2), but fails to mention the resistor values on the bottom.  Enclosure 3 shows the bottom of a TDS784D board that I bought, but someone had removed the two resistors in the bottom left (circled).  The other resistors that are replaced (shown in enclosures 2 and 3) are all 1002 (10K).

Could someone please take a look at their TDS754/784 C or D CPU board and inform let us know the values?

Hi Strick, this is Albert from France

Attached close view of one my TDS700D repaired, let me know if you need more info.

First resistor 5230 and second resistor 75R0

[strick]

Ah,
thank you Albert!

Strick