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General Category => Technical support - Hardware related => Topic started by: liodel on 19:23, 04 April 22

Title: [solved] - help identify faulty RAM with dandanator
Post by: liodel on 19:23, 04 April 22
Hi all,

happy owner of a 6128, but with a bit messy FDD after replacing a broken belt, I recently decided to add a Gotek on the disc drive 2 expasion connector.
Annnnd I missed the operation :picard:  (why the 1 pin is not at the good place !), and my 6128 is not booting anymore...

So I bought a dandanator to see if a RAM was not faulty and ....

(https://i.ibb.co/p45xYSN/IMG-20220404-185214.jpg) (https://ibb.co/frL2jsZ)

that's the case, RAM3 is detected faulty but... where is the RAM3 on the Amstrad PCB ? (picture below... not mine)

(https://www.genesis8bit.fr/images/news-amstrad-cpc/c-e/restoring_modding_special_amstrad_cpc_6128_004.jpg)

after reading this topic (https://www.cpcwiki.eu/forum/amstrad-cpc-hardware/quick-and-dirty-ram-test-for-cpc/) on the forum, I think it's IC130 on the previous image , but I want to be sure before desoldering and replacing the RAM,

can someone confirm this ?

thank you for your help.
Title: Re: help identify faulty RAM with dandanator
Post by: gerald on 19:39, 04 April 22
Yes, IC130 is bit 3 of the main ram bank (4th from the top of the right collumn)
Title: Re: help identify faulty RAM with dandanator
Post by: liodel on 17:55, 05 April 22
HI,

thank you for your reply, I just bought two of these TMS4164-12NL (https://www.ebay.fr/itm/181143266998), I hope they'll do the magic.

I'll keep you in touch !!

thanks again.
Title: Re: [solved] - help identify faulty RAM with dandanator
Post by: liodel on 11:01, 09 April 22
Hi,

after desoldering and putting back the new RAM IC...

(https://i.ibb.co/Fs23t7n/IMG-20220408-194425.jpg) (https://ibb.co/wJVg16Y)

the machine is back from the death :)

(https://i.ibb.co/x2Nky2Q/IMG-20220408-194309.jpg) (https://ibb.co/j8SNd8F)

thanks @gerald for your help and congrats for your test software !
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