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Electronics => Repair => Topic started by: Johnny10 on December 30, 2019, 03:20:27 pm

Title: Tektronix TDS7104 Sdram Memory Modules
Post by: Johnny10 on December 30, 2019, 03:20:27 pm

I have my TDS7104 open for Cmos battery change, what a PITA, I want to upgrade memory amount but I am confused about specs of modules.

I have done this in another unit a few years back and can't remember what I learned.
Some modules only show half of installed memory if they are wrong type.

The present memory (in Pic)is marked NEC PC100-322-620 168 Pin.

I have found PC100-222-620 256MB memory module that looks similar with that space between Ram chips.
But will this work?

Title: Re: Tektronix TDS7104 Sdram Memory Modules
Post by: Johnny10 on December 30, 2019, 05:32:31 pm

I think I am OK.

Found Datasheet for Infinion memory showing only difference between numbering is MHz speed.

Title: Re: Tektronix TDS7104 Sdram Memory Modules
Post by: Jwalling on December 31, 2019, 10:02:31 am

256MB memory modules must have 16 chips on them to be compatible.

Title: Re: Tektronix TDS7104 Sdram Memory Modules
Post by: Johnny10 on December 31, 2019, 01:30:59 pm

Thanks Jwalling
I ordered two 256MB modules with 8 chips each side.

Title: Re: Tektronix TDS7104 Sdram Memory Modules
Post by: Johnny10 on January 08, 2020, 01:32:40 am

Got my new chips and all is fine.
I now have 512MB main memory on 440BLX board.

Now I am wondering what TDS7104 Series Oscilloscopes think of adding memory to PPC board?
Does it make any difference?

Title: Re: Tektronix TDS7104 Sdram Memory Modules
Post by: Jwalling on January 08, 2020, 01:33:48 pm

Quote from: Johnny10 on January 08, 2020, 01:32:40 am

Now I am wondering what TDS7104 Series Oscilloscopes think of adding memory to PPC board?
Does it make any difference?

It won't make a difference.

Title: Re: Tektronix TDS7104 Sdram Memory Modules
Post by: Johnny10 on January 08, 2020, 02:14:15 pm

Thanks Jwalling for sharing your knowledge of this scope.