Dell XPS 400 one lone Heremi and uf change?

[SheDevil]

It is in a row/cluster of 5 other small caps of 2-220 16v, 3-470 6.3v, all YXG series. Reason being Digikey had only these close to origonal ripple spec.

Question is, can they be upped on the uf? After reading the other Dell threads, that they must have put that uf there for a reason, I'd like some opinion on the matter. I'll try to post a pic of the board shortly.

Old cap
1-LZ series
100uf 16v
6.3x7
Ripple 360
imp .13-.52

1- FM Panasonic
120uf 16V
Ripple 455mA
130 mOhm
6.30x11.20
EEU-FM1C121
----------------
Other uf being questioned

Old cap
2-KZJ UCC (bulging)
1800uf 6.3v
10x16
Ripple 2460
imp 0.0125

Replaced with
2-FM Panasonic
2200uf 6.3V
10x25
Ripple 2.47A
18 mOhm
EEU-FM0J222L
-------------
Old cap
2-MBZ rubycon
1500uf 16V
10x20
Ripple 2550
ESR 13

Replaced with
2-HM nichi
1800uf 16v
10x25
Ripple Current 2.8A
Impedance 12 mOhm
UHM1C182MPD-ND

Most I know is that oviously caps around the CPU are probably for that circuit, but aside from that I am clueless. And all the caps around the CPU are poly's. 560uf 4v

All others on the board are getting replaced also, no matter there brand, just because the fans to the system were filled with %$@&, and knowing the friend it came from probably ran in summer months with no air flow or a/c for 4-5 yrs.
Will be checking the PSU due to heat also.


Since there are very few threads I have found on a XPS 400 I'm including a list of all caps being replaced and how many.
Old cap
4-KZJ UCC
1800uf 6.3v
8x20
Ripple 2350
IMP 0.012

Replaced with
4-HZ Nichi
1800uf 6.3v
8x20
Ripple 2.88A
9 mOhm
UHZ0J182MPM6
--------------
Old cap
6-MBZ rubycon
820uf 6.3v
8.3x11.5
Ripple 1140
ESR 36

Replaced with
6-FM Panasonic
820uf 6.3v
8x15
Ripple Current 1.24A
Impedance 41 mOhm
EEU-FM0J821L
--------------
Old cap
4-HM nichi
680uf 16v
10x12
Ripple 1.54mA
Impedance 25 mOhm

Replaced with
4-FM Panasonic
680uf 16v
10x16
Ripple 1.79A
Impedance 26 mOhm
EEU-FM1C681
--------------
Old cap
3-KZG UCC
470uf 16V
8X11.5
Ripple 1140mA
0.036

Replaced with
3-FM Panasonic
470uf 16v
8X15
Ripple 1.24A
Impedance 41 mOhm
EEU-FM1C471L
--------------
Old cap
17-YXG rubycon
470uf 6.3V
6.3X11
Ripple 340mA
imp .22 - .87

Replaced with
17-LXZ UCC
470uf 6.3V
6.3x15
Ripple 400mA
Imp 180 mOhm
ELXZ6R3ELL471MF15D
--------------
Old cap
6-VR nichi
220uf 16v
6.3x11
Ripple 260mA
-
85c

Replaced with
6-FR Panasonic
220uf 16v
6.3x11.2
Ripple 455mA
Impedance 130 mOhm
105c
EEU-FR1C221
--------------
Old cap
4-YXG rubycon
220uf 10v
6.3x11
Ripple 340mA
imp .22

Replaced with
4-FR Panasonic
220uf 10v
6.3x11.2
Ripple 455mA
Impedance 130 mOhm
EEU-FR1A221

Thanks for any help on the matter.

[brethin]

Re: Dell XPS 400 one lone Heremi and uf change?

Does it work after all the replaced caps? Changing the uf isn't a yes or no question as long as you don't change them alot. Without reading all your post if the replacement caps have = to or higher ripple and = to or lower ESR and are close to the same uf and are the right voltage for for the circuit and are 105c are higher you should be fine.

[SheDevil]

Re: Dell XPS 400 one lone Heremi and uf change?

I'm still in the process of recapping it, and had to reorder some 220uf since I miscalculated. I have read that also, it is just sometimes you never know.

So any way here is the pic of the board with the location of the caps just incase.


Thanks