Toshiba T1600

Toshiba T1600

Preliminary Information
Release Year	1989
Leak Risk	High
Batteries	Yes, multiple rechargeable that are leaking
Mounting Technology	Through Hole, SMD, Sockets
Capacitor Types	Aluminum Electrolytic, Tantalum, Ceramic
Destructive Entry	No
Hardware Specifications
CPU	Intel 80286, 6/12MHz (switchable)
Storage	20Mb or 40Mb hard drive 3.5 inch floppy drive

The T1600 is a 286 laptop with an alps keyboard, dual batteries, 3.5" FDD, and HDD.

Original PSU is just a 12V/2A center positive on a 8mm jack. (not a classic 5.1/5.5)

Motherboard has a DIP40 socket for a 80C287 + an internal RAM expansion.

Some models have a modem card in the external slot.

Harddisk is by default a Conner CP3024, 20MB 615 CYL , 4 heads. IDE 40 pins.

There is also a T1600/40 with a 40MB disk. In both cases, BIOSes of that era are usually picky about cylinder count and a CF card replacement can only work with very specific CF cards matching cylinder count as much as possible.

Known Issues

Smoke when plugged in

Causes

• Leaking C5 capacitor shorting resistors?

• 
  C5 on Power Supply board leaking
• 
  Resistors on bottom side of PCB under C5 didn't fair well

Solutions

• Clean and recap, possibly replace parts on bottom

Recommended Preventive Maintenance

Cause

• The T1600 contains two internal rechargeable batteries that may begin to leak and cause corrosive damage to PCBs

• 
  E1 is a through hold mounted 3 cell battery on the mainboard that wasn't yet leaking in my example but could possibly.
• 
  4 cell battery connected with cable had corrosion through the entire copper wire and white power beginning to leak from the shrink seal.

Disassembly Notes

The screen hinge plastic is very brittle and may break

Original Parts

Motherboard

Toshiba, FISYS3, 36T702816G1180

Capacitor Specifications and Footprint Information

RefDes	Qty	Capacitance	Voltage	Mount	Diameter/Size	Temp	Type	Brand	Series
C1	1	220uF	10V	Through Hole Radial	6.3mm	85C	Aluminum Electrolytic	Rubycon	CE W
C2	1	33uF	25V	Through Hole Radial	6.3mm	85C	Aluminum Electrolytic

Screen inverter board

• 
  LCD assembly
• 
  inverter board

For taking the screen apart, note it doesn't have any screws, it holds entirely with tabs, making it very difficult to open, especially the lower tabs.

On the inverter board, C4 (Nippon CC SXF) severely leaks.

The LCD assembly doesn't seem to have electrolytic capacitors. It features a blue fluorescent light as backlighting.

Capacitor Specifications and Footprint Information (wip...)

RefDes	Qty	Capacitance	Voltage	Mount	Diameter/Size	Temp	Type	Brand	Series
C4	1	56uF	35V	Through Hole Radial			Aluminum Electrolytic	NCC	SXF
C6	1	22uF	35V	Through Hole Radial		105C	Aluminum Electrolytic	Marcon
C5	1	10uF	25V	Through Hole Radial		105C	Aluminum Electrolytic	Marcon

Power Supply

Toshiba, FIVPS3, "IBI,M4V0", 36P12926G-01B

Capacitor Specifications and Footprint Information

RefDes	Qty	Capacitance	Voltage	Mount	Diameter/Size	Temp	Type	Brand	Series
C1, C2	2	3300uF	10V	Through Hole Radial	16mm	105C	Aluminum Electrolytic	Nippon Chemi-Con	SXF
C3	1	2200uF	16V	Through Hole Radial	16mm	105C	Aluminum Electrolytic	Nichicon	PL*
C11	1	470uF	25V	Through Hole Radial	10mm	105C	Aluminum Electrolytic	Nippon Chemi-Con	SXF
C8, C9, C10, C45	4	220uF	10V	Through Hole Radial	6.3mm	85C	Aluminum Electrolytic	Marcon	CE-SE
C4	1	56uF	35V	Through Hole Radial	6.3mm	105C	Aluminum Electrolytic	Nippon Chemi-Con	SXF
C6	1	22uF	50V	Through Hole Radial	6.3mm	105C	Aluminum Electrolytic	Nichicon	PL*
C5	1	150uF	35V	Through Hole Radial	10mm	105C	Aluminum Electrolytic	ELNA	RSH
C7	1	10uF	25V	Through Hole Radial	5mm		Aluminum Electrolytic	Nichicon

*Nichicon PL capacitors will likely leak from the rubber bung (on the bottom) eventually, sometimes making it onto the capacitor leads. Replace as soon as possible.

Resistors

RefDes	Quantity	Markings	Value	Footprint Imperial	Note	Tolerance
R142	1	473	47kΩ	0603	Case is green	0.5%?
R60	1	223	22kΩ	0603
R59	1	472	4.7kΩ	0603

Diodes

RefDes	Quantity	Markings	Forward Voltage
33	1	N u	0.5V

Replacement Parts

Motherboard

Capacitors

RefDes	Qty	Compatible Part Number	Order Links
C1	1	16YXJ220M6.3X11 / EKY-160ELL221MF11D	Digikey	🔎	Mouser	LCSC
C2	1	50YXM33MEFR6.3X11 / 860020472005 / EKYB630ELL330MF11D	Digikey	🔎	Mouser	LCSC
Full BOM			Digikey

Power Supply

Capacitors

RefDes	Qty	Compatible Part Number	Order Links
C1, C2	2	ELXY100ELL332ML20S / UHV1A332MHD / 10YXJ3300M12.5X20	Digikey	🔎	Mouser	LCSC
C3	1	UPM1C222MHD6 / 16YXJ2200M12.5X20	Digikey	🔎	Mouser	LCSC
C11	1	ELXY250ETD471MJ20S / 860080474015 / 25ZLH470MEFC10X12.5	Digikey	🔎	Mouser	LCSC
C8, C9, C10, C45	4	16YXJ220M6.3X11 / EKY-160ELL221MF11D	Digikey	🔎	Mouser	LCSC
C4	1	ELXY500ELL560MF15D / 860080573004 / EKYA500ETD560MF11D	Digikey	🔎	Mouser	LCSC
C6	1	UPM1J220MED / 50YXJ22M5X11	Digikey	🔎	Mouser	LCSC
C5	1	UPM1J151MPD / 860040574005 / 35YXG150MEFCTA8X11.5	Digikey	🔎	Mouser	LCSC
C7	1	UPM1H100MDD / 860160472001 / 50YXJ10M5X11	Digikey	🔎	Mouser	LCSC
Full BOM			Digikey

Resistors

RefDes	Qty	Compatible Part Number	Order Links
R142	1	ERJ-PB3D4702V / ERJ-3EKF4702V / SC0603F4702F2BNRH	Digikey	🔎	Mouser	LCSC
R60	1	RC0603FR-0722KL / SC0603F2202F2BNRH	Digikey	🔎	Mouser	LCSC
R59	1	RC0603JR-074K7L / SC0603F4701F2BNRH	Digikey	🔎	Mouser	LCSC
Full BOM			Digikey

Related Links

• Official Toshiba maintenance manual on Minus Zero Degrees (archived)
• Video on disassembly and capacitor information

References

https://www.computerhope.com/hdd/hdd0035.htm (conner CP3024)