Toshiba T1900 Series: Difference between revisions

Preliminary Information
Leak Risk	High
Batteries	3 Batteries: Main battery: Nickel Metal Hydride 12 V 2,400mAH Backup battery: AA sized Nickel Metal Hydride 1.2 V 1,100mAH RTC battery: 2032 rechargeable Lithium-Vanadium 3.0 V 50mAH
Destructive Entry	No

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Revision as of 03:56, 28 November 2024

For more information, see this article's corresponding Wikipedia page: Device.

Known Issues

Laptop won't power on

The Toshiba T1950 Laptop is known not to power on due to bad caps on the power board, the lower of the two boards in the laptop. When the on button is pressed, it lights up, but immediately turns off.

Causes

Bad or leaky caps

Solutions

Replace the Caps and clean the board

Disassembly Notes

Almost all the screw are the same thread (m2.5), but vary in length. There are some M2 screws in the display assembly.

The service manual has a complete guide on how to disassemble the laptop (see the link below).

Original Parts

Lower PCB

C526, C527, C528 are surface mount caps, can be replaced with MLCC caps.
C523 and C208 are on the underside of the PCB
C523 and C208 are surface mount and can be replaced with MLCC caps
See the service manual for locations, or the Vogons post about this (both linked below)

Capacitor Specifications and Footprint Information
RefDes	Qty	Capacitance	Voltage	Mount	Diameter/Size	Height	Temp
C504	1	470 µF	25	Through Hole			105 °C
C509	1	2200 µF	6.3	Through Hole	12.75mm	10mm	105°C
C507	1	220 µF	10	Through Hole			85°C
C518	1	56 µF	16	Through Hole	6.5mm	7.5mm	105°C
C516	1	120 µF	16	Through Hole	6.5mm	11.5mm	105°C
C511	1	1000 µF	6.3	Through Hole	10.5mm	10mm	105°C
C513	1	220 µF	10	Through Hole			85°C
C515	1	220 µF	10	Through Hole			85°C
C521	1	120 µF	16	Through Hole	6.5mm	11.5mm	105°C
C520	1	56 µF	16	Through Hole	6.5mm	7.5mm	105°C
C526, C527, C528	3	10 µF	6.3	SMD
C523*	1	10 µF	6.3	SMD
C208*	1	33 µF	6.3	SMD

* On the underside of the board

Replacement Parts

Lower PCB Top Side

Capacitors
RefDes	Qty	Compatible Part Number	Order Links
			Digikey

If parts are not available or different selection is preferred, you can use the values in the Original Parts section to perform a parametric search.

References

@@ Line 61: / Line 61: @@
 |470 µF
 |25
-|
+|Through Hole
 |
 |
@@ Line 74: / Line 74: @@
 |2200 µF
 |6.3
-|
+|Through Hole
 |12.75mm
 |10mm
 |
-|105
+|105°C
 |
 |
@@ Line 87: / Line 87: @@
 |220 µF
 |10
+|Through Hole
 |
 |
 |
-|
+|85°C
-|85
 |
 |
@@ Line 100: / Line 100: @@
 |56 µF
 |16
-|
+|Through Hole
 |6.5mm
 |7.5mm
 |
-|105
+|105°C
 |
 |
@@ Line 113: / Line 113: @@
 |120 µF
 |16
-|
+|Through Hole
 |6.5mm
 |11.5mm
 |
-|105
+|105°C
 |
 |
@@ Line 126: / Line 126: @@
 |1000 µF
 |6.3
-|
+|Through Hole
 |10.5mm
 |10mm
 |
-|105
+|105°C
 |
 |
@@ Line 139: / Line 139: @@
 |220 µF
 |10
+|Through Hole
 |
 |
 |
-|
+|85°C
-|85
 |
 |
@@ Line 152: / Line 152: @@
 |220 µF
 |10
+|Through Hole
 |
 |
 |
-|
+|85°C
-|85
 |
 |
@@ Line 165: / Line 165: @@
 |120 µF
 |16
-|
+|Through Hole
 |6.5mm
 |11.5mm
 |
-|105C
+|105°C
 |
 |
@@ Line 178: / Line 178: @@
 |56 µF
 |16
-|
+|Through Hole
 |6.5mm
 |7.5mm
 |
-|105
+|105°C
 |
 |
 |
 |-
-|C526
+|C526, C527, C528
-C527
-C528
 |3
 |10 µF
 |6.3
-|
+|SMD
 |
 |
@@ Line 206: / Line 204: @@
 |10 µF
 |6.3
-|
+|SMD
 |
 |
@@ Line 219: / Line 217: @@
 |33 µF
 |6.3
-|
+|SMD
 |
 |