Swirlygiver Posted August 25, 2021 Report Share Posted August 25, 2021 I have a TSOP v1.0 that I decided to make a first attempt at a RAM upgrade using a hot air rework station. After adding the fourth chip I began having FRAG errors. After several re-flows and checking all the pins, I figured I got bad RAM chips. So I removed them all. AND STILL FRAG… after a closer inspection, I noticed that one of the nearby SMD capacitors went missing. C5B3. Any chance someone know the value of this cap, or has a list? I’m not sure if you can measure an onboard cap. Quote Link to comment Share on other sites More sharing options...
SS_Dave Posted August 25, 2021 Report Share Posted August 25, 2021 2 hours ago, Swirlygiver said: I have a TSOP v1.0 that I decided to make a first attempt at a RAM upgrade using a hot air rework station. After adding the fourth chip I began having FRAG errors. After several re-flows and checking all the pins, I figured I got bad RAM chips. So I removed them all. AND STILL FRAG… after a closer inspection, I noticed that one of the nearby SMD capacitors went missing. C5B3. Any chance someone know the value of this cap, or has a list? I’m not sure if you can measure an onboard cap. C5B3 missing is not your problem as it is related to the extra RAM chip that you have removed. You probably have a solder splash or a short on the board somewhere. Cheers SS Dave Soft modding is like masturbating, It gets the job done but it's nothing like the real thing. Quote Link to comment Share on other sites More sharing options...
Swirlygiver Posted August 26, 2021 Author Report Share Posted August 26, 2021 I was wondering if that might be the case. I’ll keep looking. I’d still like to know the value of that cap to replace it. Quote Link to comment Share on other sites More sharing options...
OGXbox Admin Posted August 26, 2021 Report Share Posted August 26, 2021 22 minutes ago, Swirlygiver said: I was wondering if that might be the case. I’ll keep looking. I’d still like to know the value of that cap to replace it. You can't measure the value while it's in circuit. With SMD caps it's a bit difficult. You need to lift a side of it off of the pad in order to measure it. The best way of going about this is to just get a bead of solder on your tip and heat one side of the cap and gently lift with some tweezers. That side will be molten and as soon as the other side gets soft it will lift a bit. Remove heat and keep holding the tweezers in place for a second or two. Assuming the side you lifted is now disconnected, you can remove the tweezers and measure the value. This is useful since the other memory sockets have the same caps. Quote Link to comment Share on other sites More sharing options...
sweetdarkdestiny Posted August 26, 2021 Report Share Posted August 26, 2021 3 hours ago, Swirlygiver said: I was wondering if that might be the case. I’ll keep looking. I’d still like to know the value of that cap to replace it. My MM shows 94,8nf so I would guess 95 or 100 nf. Mesured the cap of a 1.1 which should be the same value. Quote Link to comment Share on other sites More sharing options...
Swirlygiver Posted August 28, 2021 Author Report Share Posted August 28, 2021 Any idea what voltage? I think that will determine the physical size. Quote Link to comment Share on other sites More sharing options...
tobias Posted May 13, 2022 Report Share Posted May 13, 2022 Does someone know if the SMDs near the back are electrolytic or polymer? The ones that look like this. I want to replace them. Quote Link to comment Share on other sites More sharing options...
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