IBM ThinkPad 330C/330CS

IBM Type 5523

The ThinkPad 330C and 330CS were a pair of 486-based laptops that were released exclusively in Japan. The passive matrix 330CS released first, in November 1993, then the active matrix 330C was launched in May 1994.

These models have no TrackPoint, a gray case, and shipped with an internal AC adapter instead of a battery. A battery was offered, but is very rare.

Specifications

Spec	ThinkPad 330CS	ThinkPad 330C
Release Date	November 1993	May 1994
CPU	CPU Type: Soldered QFP IBM 486SLC2 @50MHz
Chipset	Western Digital WD76C10
RAM	Type: Non upgradeable Standard: 4 or 8MB Maximum: 8MB
Storage	2.5" IDE Requires Adapter: Yes Standard: 80 or 170MB
Display Options	9.5" Passive Matrix Color @640x480	Active Matrix Color @640x480
Graphics Chipset	Western Digital WD90C26 VRAM: 512KB
Audio	PC Speaker
Main Battery	NiCad (optional, goes in place of PSU, very rare)
CMOS Battery	CR14250SE Lithium CMOS Battery 3-cell NiCad Reserve Battery
Power Supply	Internal PSU or External proprietary 3-pin
Media Drives	3.5" 1.44MB Floppy Drive
PC Cards	1x PCMCIA Slot
Networking	None
Other I/O	- 1x Parallel - 1x Serial - 1x VGA Out - 1x PS/2
BIOS	IBM BIOS w/ Easy Setup
Pointing Device	None

Resources

Link	Details
	IBM ThinkPad 330CS Product Brochure (Japanese)

Common Faults & Maintenance

The internal PSU module for the 330C/CS suffers from leaking electrolytic capacitors and must be recapped for reliable operation. Beyond this, I don't know what else fails in these.