Cedsrepairs
Well-known member
Hello,
I've got a few powerbooks to recap,
- a PB100 that "somewhat boots" but screams for a recap (every 1uF on the board leaked!)
- a PB180 that works flawlessly, apart from the screen tunneling
- a Duo 270c that does not boot.
I've recapped older things (Apple II plus, Apple IIc) but never SMD laptops.
From my initial readings and findings
- it seems logical to me to replace the SMT electrolytics with Tantalums, at least where they are obviously used as filtering. (I wouldn't do that in a power stage.)
- the footprint of round SM electrolytics vs rectangle tantalum differ very much, tantalum ssem to come in 6mm and 3.2 mm length
- there are at least 3 brands for tantalums on farnell
Would anyone please share some insights or experience on good brands, on proper sizes to order, etc ?
Is there like a size chart ? It seems to me 6mm tantalum match >10uF SMT, and 3.2 mm size match smaller electrolytics (like 1uF)
I plan to order KEMET brand, size 2312 ( 6032 metric : meaning 6.0mm by 3.3 mm) serie T491
they've got "low esr" and "regular esr", i plan to use "regular esr" (2.2ohms) as low esr in 2021 is probably "insanely low esr" for 1989 vintage computers.
Anyway anything you could share on the topic would be welcome,
I've got a few powerbooks to recap,
- a PB100 that "somewhat boots" but screams for a recap (every 1uF on the board leaked!)
- a PB180 that works flawlessly, apart from the screen tunneling
- a Duo 270c that does not boot.
I've recapped older things (Apple II plus, Apple IIc) but never SMD laptops.
From my initial readings and findings
- it seems logical to me to replace the SMT electrolytics with Tantalums, at least where they are obviously used as filtering. (I wouldn't do that in a power stage.)
- the footprint of round SM electrolytics vs rectangle tantalum differ very much, tantalum ssem to come in 6mm and 3.2 mm length
- there are at least 3 brands for tantalums on farnell
Would anyone please share some insights or experience on good brands, on proper sizes to order, etc ?
Is there like a size chart ? It seems to me 6mm tantalum match >10uF SMT, and 3.2 mm size match smaller electrolytics (like 1uF)
I plan to order KEMET brand, size 2312 ( 6032 metric : meaning 6.0mm by 3.3 mm) serie T491
they've got "low esr" and "regular esr", i plan to use "regular esr" (2.2ohms) as low esr in 2021 is probably "insanely low esr" for 1989 vintage computers.
Anyway anything you could share on the topic would be welcome,