Japanese 3DO with leaking caps - (nearly) full poly replacement
Hi all, I've got a 1994 Japanese Panasonic 3DO with 2 leaking caps. Since all the caps are now 25 years old I decided to swap them all before more of them start to leak.
To reduce the danger of another leakage in the future I decided to swap every possible cap with a poly cap.
Has anyone here done that already and give me some hints?
I found a "fitting" (voltage, uF and measurements) poly cap for all but 3 caps. The largest cap is a 6800 uF 25v cap, since there aren't any 6800er polys I'll get a high quality electrolyte one with a higher temp rating. The two smallest ones are a 1 uF 50v and a 2.2 uF 25v. I couldn't find any 1 uF polys and the few 2.2 uF ones wouldn't fit in the place since the old cap is literally a small one.
I'll list all the caps I've removed. I can also take some pictures of the PCBs if you want.
Main PCB:
1x 6800uF 25V 105°C 22*30mm Panasonic with HA CE and 4512 marks
1x 1000uF 10V 85°C 10*12mm Panasonic with M and 44AL marks
1x 1000uF 6.3V 105°C 10*12mm Panasonic with GE and 444D marks
4x 470uF 6.3V 85°C 6*11mm Rubycon with 855 mark
1x 220uF 6.3V 85°C 6*11mm Panasonic with SU and F435 marks
6x 100uF 6.3V 85°C 5*11mm Panasonic with SU and M444 marks
3x 47uF 6.3V 85°C 5*10mm Panasonic with SU and D444 marks
2x 22uF 16V 85°C 5*11mm Panasonic with SU and 43N marks
1x 10uF 16V 105°C 5*11mm Panasonic with GE and 42B marks
3x 10uF 16V 85°C 5*11mm Panasonic with SU and 44N marks
CD drive PCB:
2x 100uF 16V 8*6mm 85°C Panasonic with KS and 443X marks
1x 100uF 6.3V 7*6mm 85°C Panasonic with 45A mark
1x 22uF 6.3V 85°C Panasonic - not sure about the marks and the sizes since it's lost in my mess atm
1x 2.2uF 25V 3*6mm 85°C Panasonic with 43A mark
1x 1uF 50V 4*6mm 85°C Panasonic with 44J mark
The two small 105°C caps are the ones that started leaking.
Can you spot some critical caps which shouldn't be replaced with "normal" polys? I thought about using ceramic caps for the 2.2 and 1uF ones but I'm not sure if they would work fine on the CD drive PCB.
Also I'm a little bit confused about the quality of polys. I read in another thread that kemet polys are crap but I also saw links to no name aliexpress polys which works fine.
Bonus points if someone can link me a battery holder for the save game battery. It's a through hole one with 2 positive leads with a 11mm gap and the negative lead is 18mm away from it.
Thanks in advance for your time and help. I'll report back after I switched the caps and list the ones I used so others could gain from my experience! :-)
To reduce the danger of another leakage in the future I decided to swap every possible cap with a poly cap.
Has anyone here done that already and give me some hints?
I found a "fitting" (voltage, uF and measurements) poly cap for all but 3 caps. The largest cap is a 6800 uF 25v cap, since there aren't any 6800er polys I'll get a high quality electrolyte one with a higher temp rating. The two smallest ones are a 1 uF 50v and a 2.2 uF 25v. I couldn't find any 1 uF polys and the few 2.2 uF ones wouldn't fit in the place since the old cap is literally a small one.
I'll list all the caps I've removed. I can also take some pictures of the PCBs if you want.
Main PCB:
1x 6800uF 25V 105°C 22*30mm Panasonic with HA CE and 4512 marks
1x 1000uF 10V 85°C 10*12mm Panasonic with M and 44AL marks
1x 1000uF 6.3V 105°C 10*12mm Panasonic with GE and 444D marks
4x 470uF 6.3V 85°C 6*11mm Rubycon with 855 mark
1x 220uF 6.3V 85°C 6*11mm Panasonic with SU and F435 marks
6x 100uF 6.3V 85°C 5*11mm Panasonic with SU and M444 marks
3x 47uF 6.3V 85°C 5*10mm Panasonic with SU and D444 marks
2x 22uF 16V 85°C 5*11mm Panasonic with SU and 43N marks
1x 10uF 16V 105°C 5*11mm Panasonic with GE and 42B marks
3x 10uF 16V 85°C 5*11mm Panasonic with SU and 44N marks
CD drive PCB:
2x 100uF 16V 8*6mm 85°C Panasonic with KS and 443X marks
1x 100uF 6.3V 7*6mm 85°C Panasonic with 45A mark
1x 22uF 6.3V 85°C Panasonic - not sure about the marks and the sizes since it's lost in my mess atm
1x 2.2uF 25V 3*6mm 85°C Panasonic with 43A mark
1x 1uF 50V 4*6mm 85°C Panasonic with 44J mark
The two small 105°C caps are the ones that started leaking.
Can you spot some critical caps which shouldn't be replaced with "normal" polys? I thought about using ceramic caps for the 2.2 and 1uF ones but I'm not sure if they would work fine on the CD drive PCB.
Also I'm a little bit confused about the quality of polys. I read in another thread that kemet polys are crap but I also saw links to no name aliexpress polys which works fine.
Bonus points if someone can link me a battery holder for the save game battery. It's a through hole one with 2 positive leads with a 11mm gap and the negative lead is 18mm away from it.
Thanks in advance for your time and help. I'll report back after I switched the caps and list the ones I used so others could gain from my experience! :-)
