4.02 CF DIMM just stopped working Error 22

[maiden2099]

Hey Guys, I have a CF setup with a 4.02 DIMM and went to turn it on (To take pics to sell of course) and I'm getting Error 22. Cleaned the pins, reseated, swapped daughter boards and nothing. Regular cart works fine, tested voltage on Sun power and Capcom I/O power and all in spec. Any other ideas?

 

[maiden2099]

Oh and a side note, its been in the cab and was working as of 2 days ago.

 

[alexvw]

Hello am running into similar issue, I just did a fan replacement and got same set up with DIMM and just stopped working I get a black screen system don’t even boot but if I switch to a regular cart system works and game boots with no problem wondering if something failed inside DIMM cartridge so have no clue where to start

 

[mR_CaESaR]

You may need to replace the buffer chip on the DIMM (it's directly on the oppose side of the BIOS).

I had this exact issue and thought it was the BIOS, I changed the BIOS so many times, but continued to get error 22. I changed over the buffer chip and upon first boot it worked perfectly fine.

This is the buffer chip

 

[alexvw]

so for my problem i back track and found that i was running old multi bios ones i burnt a new bios in both mother boards everything started working again i let system run for hours in demo mode no problem

 

[doccaz]

You may need to replace the buffer chip on the DIMM (it's directly on the oppose side of the BIOS).

I had this exact issue and thought it was the BIOS, I changed the BIOS so many times, but continued to get error 22. I changed over the buffer chip and upon first boot it worked perfectly fine.

Running into this exact issue with my NetDimm as well. It was working fine for a week, then started getting error 22. Tried changing the power supply for an adjustable one to mitigate the low 5V line under load, but haven't thought about looking into this chip.

Is it normal for the DIMM to just turn itself off when this chip is bad? I can see the LEDs on the boards going off when it powers up. The Naomi itself works great without the DIMM, and all diagnostics pass.

Did you use a specific manufacturer? I'm looking at the datasheets, there are options from NXP, Hitachi, Renesas, TI.

 

[mR_CaESaR]

I believe it's very common for these to go if the psu runs over 5v, it doesn't take much to kill these from what I've read.

I bought my buffers off ebay

 

[XeD]

I just repair 2. If replacing the buffer doesn't fix it, the bios might have gone with it

 

[doccaz]

I just repair 2. If replacing the buffer doesn't fix it, the bios might have gone with it

Ok, I replaced the buffer chip, still no go. The chip on my finger is the original one, the replacement is the Philips part.

The NetDIMM BIOS chip would be the one labeled IC11 at the top of the daughterboard?

 

[mR_CaESaR]

Are you 100% you've soldered correctly and there's no bridges?

Have you also done the bios?

 

[Rukas]

One of my netdimms has this same issue. Must be crazy common.

 

[mR_CaESaR]

It's when the voltage hits over 5v. The tolerance on the buffer chips aren't that great.

 

[XeD]

Ok, I replaced the buffer chip, still no go. The chip on my finger is the original one, the replacement is the Philips part.

The NetDIMM BIOS chip would be the one labeled IC11 at the top of the daughterboard?

The bios ic is located behind the buffer ic. Ic 36 for the 48pin and ic14 for the 56pin.

 

[doccaz]

Are you 100% you've soldered correctly and there's no bridges?

Have you also done the bios?

I believe so. I tested all pins and they are solid and without shorts.

 

[doccaz]

The bios ic is located behind the buffer ic. Ic 36 for the 48pin and ic14 for the 56pin.

I got the 56-pin version. Unfortunately I do not seem to have an adapter for a 56-pin TSOP for my programmer

I guess I cannot use the other pins for a 48 TSOP without altering something else on the board, correct?

 

[XeD]

I got the 56-pin version. Unfortunately I do not seem to have an adapter for a 56-pin TSOP for my programmer

I guess I cannot use the other pins for a 48 TSOP without altering something else on the board, correct?

You can use the 48 pin. Just desolder the 56, program the 48 and solder it in the ic36 spot. If you want new you can use https://www.digikey.ca/en/products/detail/macronix/MX29LV160DTTI-70G/2744816
Or the equivalent of nos chips

 

[doccaz]

You can use the 48 pin. Just desolder the 56, program the 48 and solder it in the ic36 spot. If you want new you can use https://www.digikey.ca/en/products/detail/macronix/MX29LV160DTTI-70G/2744816
Or the equivalent of nos chips

Thank you! I'll order the part ASAP.