Hi all,
I have dug out my Toshiba T1200 in preparation for recapping and cleaning. I have not found much info on cap values and internal batteries on the net so I will post some here for future reference.
First problems with my machine are dead CMOS and RTC batteries. I mesured them and they both come dead. Gladly none leaked. I did not take these batteries appart, only mesured them and compared to avaiable ones to get cells dimensions. Part numbers and specs:
P1550496.jpgbattery.jpg
I have taken out BIOS ROM, it is AM27C256-205DC made by AMD. I have backed up contents and attach it here. Here is pic of ceramic BIOS ROM package and main CPU by OKI, 80C86A-2 - cmos version of Intel 8086
bios_cpu.jpg
Caps are from Nichicon and Elna
List of electrolytic capacitors on PSU Board:
List of electrolytic capacitors on Main Board (pitch of smaller caps based on PSU small cap):
Power brick is 12V@2.2A center positive, rated 40W. It seems to have 6.5mm outer diameter and about 3mm inner diameter.
brick.jpg
I have dug out my Toshiba T1200 in preparation for recapping and cleaning. I have not found much info on cap values and internal batteries on the net so I will post some here for future reference.
First problems with my machine are dead CMOS and RTC batteries. I mesured them and they both come dead. Gladly none leaked. I did not take these batteries appart, only mesured them and compared to avaiable ones to get cells dimensions. Part numbers and specs:
- CMOS: XZ0075P04, TOSHIBA 9001R, 4.8V, it is a bank of 4 1/3AA size NiCd cells, spot welded together, wired using 24AWG wire with JST PH 2mm pitch 2 pole connector, length approx 30cm, unknown capacity
- RTC: MEMO POWER Sealed NiCd Battery, 2-5IFT-B 129, 2.4V 50mAh by Yuasa Battery Co., LTD. This is bank of two NiCd cells spot welded together (Ø15,4x5,8mm), connected via 26 AWG wire about 17cm long. It uses the same connector as CMOS one.
- Main battery: MODEL NO. PA7491U, DC 7.2V 2200mAh, it seems to be 6 cell series pack. Case glued or ultrasonicly welded. It would be possible to 3D print some holder for 6pack of AA or C NiMH cells to fit.
P1550496.jpgbattery.jpg
I have taken out BIOS ROM, it is AM27C256-205DC made by AMD. I have backed up contents and attach it here. Here is pic of ceramic BIOS ROM package and main CPU by OKI, 80C86A-2 - cmos version of Intel 8086
bios_cpu.jpg
Caps are from Nichicon and Elna
List of electrolytic capacitors on PSU Board:
- 10uF 25V 85°C 2.5mm pitch, x1
- 150uF 35V 105°C 5mm pitch, x1
- 220uF 25V 105°C 3.5mm pitch, x1
- 470uF 25V 105°C 5mm pitch, x3
- 1800uF 10V 105°C 5mm pitch, x2
List of electrolytic capacitors on Main Board (pitch of smaller caps based on PSU small cap):
- 10uF 25V 85°C 2.5mm pitch, x3
- 33uF 25V 85°C 2.5mm pitch, x2
- 4700uF 10V 85°C 7.5mm pitch, x1
Power brick is 12V@2.2A center positive, rated 40W. It seems to have 6.5mm outer diameter and about 3mm inner diameter.
brick.jpg