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IBM ThinkPad T40 Hardware Maintenance Manual

The IBM Mobile Systems ThinkPad Computer Hardware Maintenance Manual of February 2003 is IBM's service manual for the ThinkPad T40, part number 92P1286, Second Edition (February 2003), 166 pages. The title page lists the ThinkPad T40 (MT 2373/2374/2375/2376) and the ThinkPad Dock II (MT 2877). The later February 2006 manual covers the T40 to T42p and adds machine types 2378 and 2379.

Contents

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Page numbers are the manual's own.

  • Introduction (pp. 3-21): strategy for replacing FRUs, error messages, diskette compatibility matrix, multilingual safety notices, safety information and the laser compliance statement.
  • General descriptions (pp. 25-42): read this first, related service information including recovering the hard disk, passwords (p. 29) and power management (p. 32); checkout guide (p. 35) with PC-Doctor and the power system checkout (p. 39).
  • ThinkPad T40 Series, from p. 43: product overview and specifications (p. 45), status indicators, FRU tests, Fn key combinations; symptom-to-FRU index (p. 54).
  • FRU replacement notices (p. 62): screw notices and retaining serial numbers.
  • Removing and replacing a FRU (pp. 65-133): numbered procedures from 1010 Battery pack (p. 66) to 3020 ThinkPad Dock II top cover (p. 131).
  • Locations (p. 134) and parts list (p. 137), with the T40 series model matrix, AC adapters, LCD FRUs, keyboards and recovery CDs.
  • Notices (p. 160).

What this manual does not contain

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The manual works at FRU level. It has no schematics and no component values, and a system board is a single part number. The only capacitor it mentions is the "bulging capacitor" hazard in the safety inspection guide.

What it settles

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The power system checkout (pp. 39-41) gives these limits: AC adapter output +15.5 to +17.0 V dc at pin 1; battery pack +0 to +12.6 V dc between terminals 1 and 5, discharged if below +11.0 V dc, and 4 to 30 kΩ between terminals 4 and 5 if above it; backup battery +2.5 to +3.2 V dc on the red wire.

Download: IBM ThinkPad T40 Hardware Maintenance Manual.pdf

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