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S82G-1502-03 IBM Mobile Systems Hardware Maintenance Manual Volume 2: ThinkPad Computers April 1995 We Want Your Comments! (Please see page 491) This Manual Supports: ThinkPad 340x (2610) ThinkPad 355x (2619) ThinkPad 360x (2620) ThinkPad 370x (9545) ThinkPad 700x (9552) ThinkPad 701x (2630) ThinkPad 720x (9552) ThinkPad 750x (9545) ThinkPad 755x (9545)
S82G-1502-03 IBM Mobile Systems Hardware Maintenance Manual Volume 2: ThinkPad Computers April 1995 We Want Your Comments! (Please see page 491) IBM
Note Before using this information and the product it supports, be sure to read the general information under “Notices” on page 497. Fourth Edition (April 1995) The following paragraph does not apply to the United Kingdom or any country where such provisions are inconsistent with local law: INTERNATIONAL BUSINESS MACHINES CORPORATION PROVIDES THIS PUBLICATION “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHAN
About This Manual This manual contains service and reference information for * * IBM ThinkPad computer products. Use this manual along with the advanced diagnostic tests to troubleshoot problems effectively. The manual is divided into sections as follows: The Introduction section provides general information, guidelines, and safety information required to service computers. The majority of the manual consists of product-specific sections that include service, reference, and product-sp
Related Publications The following mobile product publications are available through IBM or your IBM Authorized Dealer. Publication Part, Form Number Mobile Systems HMM 30H2356, S82G-1501-01 Volume 1: Laptop, Notebook, Portable, and Thinkpad Computers ThinkPad 700 (9552) HMS 42G2016, S42G-2016 ThinkPad 700 (9552) HMR 42G2015, S42G-2015 ThinkPad 700C (9552) HMS 42G2022, S42G-2022 ThinkPad 700C (9552) HMR 42G2021, S42G-2021 ThinkPad 720/720C (9552) 61G1193, S61G-1193 HMS ThinkPad 720/720C (
Obsolete Publications This manual obsoletes the following publication: Publication Part, Form Number Mobile Systems HMM 82G1502, S82G1502 Volume 2: ThinkPad 19H1080, S82G1502 Computers Related Diskettes The following diskettes are available through IBM or your IBM Authorized Dealer. Diskette Part, Form Number ThinkPad 300 (2615) 33G9361, S33G-9361 Advanced Diagnostics ThinkPad 350, 350C, 425, A211000, GA21-1000 425C (2618) Advanced Diagnostics Diskette ThinkPad 500 (2603) Adv. 71G3702, S7
vi IBM Mobile Systems HMM
Contents Introduction . . . . . . . . . . . . . . . . . . . 1 Portable Computer Descriptions .......... 2 Drive and Diskette Compatibility Matrix ....... 4 Important Service Information ........... 5 Safety Notices (Multi-lingual Translations) ..... 7 Safety Information . . . . . . . . . . . . . . . . 14 Laser Compliance Statement ........... 19 Screw Size Chart ................. 20 ThinkPad 340x (IBM 2610) ............ 23 General Checkout . . . . . . . . . . . . . . . . . 25 Symptom-to
Symptom-to-FRU Index . . . . . . . . . . . . . 331 Related Service Procedures ........... 344 Product Overview . . . . . . . . . . . . . . . . 349 FRU Removals and Replacements ........ 350 Locations . . . . . . . . . . . . . . . . . . . . 381 Parts Listing . . . . . . . . . . . . . . . . . . 383 ThinkPad 755CE, 755CSE, 755CV, 755CX (9545) 391 General Checkout . . . . . . . . . . . . . . . . 393 Symptom-to-FRU Index . . . . . . . . . . . . . 408 Related Service Procedures ........... 420
Introduction Portable Computer Descriptions .......... 2 Drive and Diskette Compatibility Matrix ....... 4 Important Service Information ........... 5 How to Use Error Messages .......... 6 How to Read POST Error Messages ...... 6 Safety Notices (Multi-lingual Translations) ..... 7 Safety Information . . . . . . . . . . . . . . . . 14 General Safety . . . . . . . . . . . . . . . . 14 Electrical Safety . . . . . . . . . . . . . . . . 15 Safety Inspection Guide ............ 16 Handling El
Portable Computer Descriptions All models in the following table have VGA video. Models N51, CL57, and P70/75 and Thinkpads 700x and 720x are * * Micro Channel systems. All others are AT bus systems. Model Type Processor Memory Hrd Dsk Model L40SX 8543-044 386SX-20 2M/18M 60M Model N45 SL 2614-065 386SL-25 2M/8M 80M 2614-067 386SL-25 2M/8M 120M Model N51 SLC 8551-025 386SLC-16 2M/10M 80M Model N51 SX 8551-033 386SX-16 2M/10M 40M Model CL57 SX 8554-045 386SX-20 2M/16M 80M Model P70 38
Model Type Processor Memory Hrd Dsk ThinkPad 701C 2630 486DX2-25/50 4M/32M 360MB 2630 486DX2-25/50 4M/32M 540MB 2630 486DX4-25/75 8M/32M 360MB 2630 486DX4-25/75 8M/32M 540MB ThinkPad 701Cs 2630 486DX2-25/50 4M/32M 360MB 2630 486DX2-25/50 4M/32M 540MB 2630 486DX4-25/75 8M/32M 360MB 2630 486DX4-25/75 8M/32M 540MB ThinkPad 710T 2523-09Y 486SLC2-25 4M/12M TPF 2523-302 486SLC2-25 4M/12M 60M 2523-303 486SLC2-25 4M/12M 60M ThinkPad 720 9552-307 486SLC-25/50 4M/16M 120M 9552-308 486SLC-25/50 4
Drive and Diskette Compatibility Matrix The following table provides identification information for 3.5-inch drives. Diskette Identifying Drive Mark 3.5-Inch - 1.44MB 1.44 on the eject button 3.5-Inch - 2.88MB 2.88 on the eject button The following table provides compatibility information for 3.5-inch diskettes and 3.5-inch diskette drives. Diskette 1.44MB 2.88MB Capacity Drive Drive 1.0MB Read/Write Read/Write 2.0MB Read/Write Read/Write 4.0MB Not Compatible Read/Write The followi
Important Service Information Important Diskette fixes are customer installable. The diskette fixes are located on the PC Company Bulletin Board Service (BBS). The direct phone line for modem connection is 919-557-0001 or tieline 255-0001. Advise customers to contact the PC Company HelpCenter at 800-772-2227 if they need assistance in obtaining or installing any diskette fixes. Customers in Canada should call IBM HelpPC at 800-565-3344 for assistance or down-load information. The Canadi
The advanced diagnostic tests are intended to test only IBM products. Non-IBM products or modified options can give false errors and invalid responses. Hard Disk Drive Replacement Strategy: Always try to run a low-level format before replacing a hard disk drive. Warning: The drive startup sequence in the computer you are servicing might have been changed. Be extremely careful during write operations such as copying, saving, or formatting. Data or programs can be overwritten if you select
Safety Notices (Multi-lingual Translations) In this manual, safety notices appear in English with a page number reference to the appropriate multi-lingual, translated safety notice found in this section. The following safety notices are provided in English, French, German, Italian, and Spanish languages. Safety Notice 1 Before the computer is powered-on after FRU replacement, make sure all screws, springs, or other small parts are in place and are not left loose inside the computer. Verif
Safety Notice 2 Some standby batteries contain a small amount of nickel and cadmium. Do not disassemble it, recharge it, throw it into fire or water, or short-circuit it. Dispose of the battery as required by local ordinances or regulations. Use only the battery in the appropriate parts listing. Use of an incorrect battery can result in ignition or explosion of the battery. Certaines batteries de secours contiennent du nickel et du cadmium. Ne les démontez pas, ne les rechargez pas, ne le
Safety Notice 3 The battery pack contains small amounts of nickel. Do not disassemble it, throw it into fire or water, or short-circuit it. Dispose of the battery pack as required by local ordinances or regulations. Use only the battery in the appropriate parts listing when replacing the battery pack. Use of an incorrect battery can result in ignition or explosion of the battery. La batterie contient du nickel. Ne la démontez pas, ne l'exposez ni au feu ni à l'eau. Ne la mettez pas en cou