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IBM ThinkPad X41 Tablet Hardware Maintenance Manual

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Revision as of 22:31, 30 September 2026 by Josh (talk | contribs) (Truncated PDF replaced with the complete file (archive.org manualsbase-id-249877, P/N 39T9290, Jan 2006); page rewritten from the manual: contents with page numbers, power checkout limits, specs)

The ThinkPad Computer Hardware Maintenance Manual of January 2006 is Lenovo's hardware maintenance manual for the ThinkPad X41 Tablet, part number 39T9290, First Edition (January 2006). The PDF has 140 pages: four front pages, 135 numbered pages and the back cover, which carries the part number.

The title page lists the products supported: ThinkPad X41 Tablet (machine types 1866, 1867 and 1869) and ThinkPad X4 Dock (machine type 2506). The edition notice reads "© Copyright Lenovo 2006. Portions © Copyright International Business Machines Corporation 2006".

The parts list also gives FRUs for machine type 1868, which the title page does not name.

Contents

Page numbers are the manual's own.

  • About this manual (p. 1).
  • Introduction (pp. 3-26): strategy for replacing FRUs and hard disk drives, an important notice on handling the system board (its BGA chipsets crack if the board is dropped or bent), how to use error messages (pp. 3-4); strategy for replacing FRUs on configure-to-order (CTO), custom model variant (CMV) and general announce variant (GAV) machines (pp. 4-7); replacing RoHS-compliant FRUs (p. 7); diskette compatibility matrix (p. 8); safety notices in English, French, German, Hebrew, Italian and Spanish (pp. 8-19); general and electrical safety, safety inspection guide, handling of electrostatic discharge-sensitive devices, grounding requirements (pp. 20-25); laser compliance statement (p. 26).
  • General descriptions (pp. 29-43): what to do first (p. 29); service web site and restoring the pre-installed system (p. 31); passwords (p. 32); power management (p. 34); checkout guide, testing the computer and PC-Doctor (pp. 37-40); power system checkout (pp. 40-43).
  • ThinkPad X41 Tablet (from p. 45): specifications (p. 47), status indicators (p. 49), FRU tests including the digitizer firmware and sampling tests (p. 51), Fn key combinations (p. 53); symptom-to-FRU index with numeric error codes, error messages, beep and no-beep symptoms, LCD-related, intermittent and undetermined problems (pp. 55-67); FRU replacement notices, covering screw notices and retaining serial numbers (pp. 68-69).
  • Removing and replacing a FRU (pp. 72-112): numbered procedures 1010 Battery pack to 1160 Fansink and 2010 LCD bezel to 2060 Digitizer assembly. The backup battery is 1110 (p. 90), reached after removing the battery pack and keyboard. The digitizer assembly (2060, p. 111) is the last step in the LCD sequence and is taped to the back of the LCD module.
  • Locations (pp. 113-117): front, rear and bottom views of the X41 Tablet, and front and rear views of the X4 Dock.
  • Parts list (pp. 118-132): overall FRU list (p. 118), LCD FRUs (p. 125), keyboards (p. 127), recovery CDs (p. 128), miscellaneous parts and AC adapters (p. 129), common parts list (p. 130).
  • Notices (p. 133) and trademarks (p. 135).

What this manual does not contain

The manual works at FRU level. There are no schematics, no board layouts and no component values. The only capacitor mentioned is the "bulging capacitor" hazard in the safety inspection guide (p. 23). It has no model matrix; FRUs for a particular machine are identified through the CTO, CMV and GAV procedure (pp. 4-7).

What it settles

The power system checkout (pp. 40-43) gives these limits:

Power system checkout, ThinkPad X41 Tablet (pp. 41-43)
Item Measured at Correct reading
AC adapter Pin 1 to pin 2 (ground) of the adapter plug +15.5 to +17.0 V dc
Battery pack Terminal 1 (+) to terminal 5 (−) +0 to +16.8 V dc; discharged if below +14.4 V
Battery pack, above +14.4 V Resistance between terminals 4 and 5 4 to 30 kΩ
Backup battery Red wire (+) to black wire +2.5 to +3.2 V dc

The specifications (pp. 47-48) list Pentium M 753 (1.2 GHz), 758 (1.5 GHz) and 778 (1.6 GHz) processors, 256 MB or 512 MB on board with one DDR2-533 SO-DIMM slot, Intel 915GM graphics, a 12.1-inch XGA wide-viewing-angle panel, and a 1.8-inch IDE hard disk of 20 to 60 GB.

The screw notices (p. 68) specify nylon-coated screws, used only once; the screw pack is P/N 26R9169 (p. 129). The pen (P/N 39T7303, p. 124) and the digitizer assembly (P/N 39T0805, p. 126) are separate FRUs. After a system board replacement the serial number must be written back with the ThinkPad Hardware Maintenance Diskette version 1.71 or later (p. 69).

Download: IBM ThinkPad X41 Tablet Hardware Maintenance Manual.pdf

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