Capacitor leakage plague woes
Does anyone have any experience with capacitor plague on PCB? The surface mounted caps on main board went bad and I replaced them with new caps (BTW, I recommend anyone to replace them as well as they are time bombs). However, I discovered two of the old surface mounted caps leaked and plague got under the coating. I still testing for trace damage but should there be anything else I should be aware in testing the PCB? I have minimal electronical knowledge so any information that can help me play bad FMV games soon as possible will be appreciated.
Comments
Originally posted by: Guntz
What led you to believe the caps had gone bad? Visual inspection or functional issues?
Both. When my Sega CD turns on, it just displays a silent bios screen without the floating Sega CD logo. According to the troubleshooting guide of a service manual I downloaded, it is a main board issue. I inspected the board and notice some corrision on the side caps and when I removed the caps, it can see much worse plague underneath.
Originally posted by: Guntz
I'll have to check my SCD1 boards for that, thanks. Should probably do the power and mainboards. I've been hesitant about bothering with a tedious cap kit because few ever say if that fixes severe functional issues.
Guntz, Does the model 1 have the fuse issues like the model 2? I used your advice from the sega-16 forums to fix my model 2 and it fixed my issue.
Originally posted by: Mega Mario Man
Originally posted by: Guntz
I'll have to check my SCD1 boards for that, thanks. Should probably do the power and mainboards. I've been hesitant about bothering with a tedious cap kit because few ever say if that fixes severe functional issues.
Guntz, Does the model 1 have the fuse issues like the model 2? I used your advice from the sega-16 forums to fix my model 2 and it fixed my issue.
Sorry to take the question but both models have the same fuses as I replaced the fuses for both models including the one I am trying to fix.
For the powerboard and CD board, the caps on mine look good so the main board should be looked at. I recall someone on Youtube have the same problem so I am not alone. Since the problem is with the surface caps they are small and need to look closely for any corrosion. Since they are like regular caps, I used a hot air tool to remove them. But with the headaches I been having it anything could be the problem but the mainboard seems to be the culprit.
Just to recap (no pun intended), my original Sega CD Model 1 shows the BIOS for one second, then goes to a black screen. It plays the music, but only the Sega CD half. The Genesis side of the music is silent. This unit does in fact play the Pier Solar PCM CD if present.
Then there's the parts unit I just got, it hangs at the BIOS and has no music or animation. Haven't tried Pier Solar's PCM CD yet.
Asmik, you ever heard of that first issue? I wonder if it's like a RAM failure or something, or just bad caps.
Originally posted by: Guntz
I cracked open both my severely broken Sega CD and the parts unit I just got which has your issue Asmik (bios hang, no music or animation) and they both have crusty looking surface mount caps. I guess it's time to look into a cap kit. Probably after I get through the mountain of Famicom cartridges I have to solder.
Just to recap (no pun intended), my original Sega CD Model 1 shows the BIOS for one second, then goes to a black screen. It plays the music, but only the Sega CD half. The Genesis side of the music is silent. This unit does in fact play the Pier Solar PCM CD if present.
Then there's the parts unit I just got, it hangs at the BIOS and has no music or animation. Haven't tried Pier Solar's PCM CD yet.
Asmik, you ever heard of that first issue? I wonder if it's like a RAM failure or something, or just bad caps.
For that model one you have, I never heard about that issue but I assume it is a mainboard problem but I am not 100%. Who knows what traces are affected by the cap plague.
I ordered a cap kit from console5 and the guy who runs it, Luke, been giving me advice. I am not sure if they ship to Canada but you can use the repair wiki to look at cap sheets and the maintenance manual.
http://console5.com/wiki/Sega_CD_v1
While I stated this before, You can't really remove those surface caps with just a solder tool like normal caps. I know that the wiki says you can just cut them but I also it can cause damage so I recommend an hot air tool but they can cost at least around $40-60.
I hope you have better fortune than me Guntz. I miss my Sega Model 1 battleship.