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EEVblog 1527 - Toshiba T1000LE DOS Vintage Laptop Repair HELL

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c64:

--- Quote from: vasonline on February 05, 2023, 10:46:31 am ---
- Battery charger works, as an experiment, I charged up six NiMh cells with it, and it would run on that just fine.


--- End quote ---

How many NiCd cells were in the original battery pack? Internet says 4, but it wouldn't be 7.2V then

vasonline:

--- Quote from: c64 on February 07, 2023, 10:38:18 pm ---

How many NiCd cells were in the original battery pack? Internet says 4, but it wouldn't be 7.2V then

--- End quote ---

There were 6 of them.

With the DC IN led lit, but the rest of the laptop still powered off,
you could see the charge pulses onto the battery pack terminals. (with scope).

The TL1451A on the M/B has been an important chip for me, to check. together with the scope Shots from Thom.
(a big thanks to him for putting that online- it was very helpfull at the time)

c64:

--- Quote from: vasonline on February 05, 2023, 10:46:31 am ---
- You _do_ need the hard disk installed. There is a switch on the MB/HDD that will press in when installed. Laptop wil turn on and will shut off w/o HDD. Very confusing!


--- End quote ---

Is it enough to just press the switch?

vasonline:

--- Quote from: c64 on February 09, 2023, 08:09:05 pm ---
--- Quote from: vasonline on February 05, 2023, 10:46:31 am ---
- You _do_ need the hard disk installed. There is a switch on the MB/HDD that will press in when installed. Laptop wil turn on and will shut off w/o HDD. Very confusing!


--- End quote ---

Is it enough to just press the switch?

--- End quote ---

Yes.

GRADIENT:
I had pretty much all of the electrolytic capacitors leaking badly inside the laptop. Also all four of the 220uF 25V caps had leaked all over the place. I tried recapping and cleaning the board but still does not boot. Battery charging works fine and laptop even tries to start with the original battery without power supply.

Some traces in between the IC505 and the C506 cap were corroded. I doubt, but I'm just wondering if anyone has removed IC505 and has a picture of the PCB below the IC. I Would like to check the continuity of the traces under the IC but would rather not remove the IC especially if it is not absolutely necessary. Also, still unsure whether I should go any further with the repair.


Edit:
By the way, if anyone needs a list of electrolytic capacitors for the laptop (I did not open LCD) then this is the list that I measured (no guarantees) when I recapped mine:
1x 1000uF 6.3V 8x20mm
2x 220uF 35V 8x20mm
2x 120uF 25V 6.5x14mm
2x 220uF 10V 6.5x12mm
4x 220uF 25V 10x13mm

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