IBM Thinkpad R30 R31 Manual

–Stand on suitable rubber mats (obtained locally, if
necessary) to insulate you from grounds such as
metal floor strips and machine frames.
Observe the special safety precautions when you work
with very high voltages; these instructions are in the
safety sections of maintenance information. Use
extreme care when measuring high voltages.
vRegularly inspect and maintain your electrical hand tools
for safe operational condition.
vDo not use worn or broken tools and testers.
vNever assume that power has been...

you can continue without first correcting the problem.
Consider these conditions and the safety hazards they
present:
vElectrical hazards, especially primary power (primary
voltage on the frame can cause serious or fatal
electrical shock).
vExplosive hazards, such as a damaged CRT face or
bulging capacitor.
vMechanical hazards, such as loose or missing
hardware.
The guide consists of a series of steps presented in a
checklist. Begin the checks with the power off, and the
power cord disconnected....

Notes:
1. Use product-specific ESD procedures when they
exceed the requirements noted here.
2. Make sure that the ESD protective devices you use
have been certified (ISO 9000) as fully effective.
When handling ESD-sensitive parts:
vKeep the parts in protective packages until they are
inserted into the product.
vAvoid contact with other people.
vWear a grounded wrist strap against your skin to
eliminate static on your body.
vPrevent the part from touching your clothing. Most
clothing is insulative and...

Class 1 laser products. Elsewhere, the drive is certified to
conform to the requirements of the International
Electrotechnical Commission (IEC) 825 and CENELEC EN
60 825 for Class 1 laser products.
When an optical drive is installed, note the following.
CAUTION:
Use of controls or adjustments or performance of
procedures other than those specified herein might
result in hazardous radiation exposure.
O uso de controles, ajustes ou desempenho de
procedimentos diferentes daqueles aqui especificados
pode...

Opening the CD-ROM drive could result in exposure to
hazardous laser radiation. There are no serviceable parts
inside the CD-ROM drive.Do not open.
Some CD-ROM drives contain an embedded Class 3A or
Class 3B laser diode. Note the following.
DANGER
Laser radiation when open. Do not stare into the
beam, do not view directly with optical instruments,
and avoid direct exposure to the beam.
Radiação por raio laser ao abrir. Não olhe fixo no
feixe de luz, não olhe diretamente por meio de
instrumentosóticos e...

General Descriptions
This chapter includes descriptions for any ThinkPad model
that has the PC-Doctor DOS diagnostics program. Some
descriptions might not apply to your particular computer.
20ThinkPad R30/R31 HMM 

Read this first
Before you go to the checkout guide, be sure to read this
section.
Important Notes:
vOnly certified trained personnel should service the
computer.
vRead the entire FRU service procedures before
replacing any FRUs.
vUse new nylon-coated screws when you replace
FRUs.
vBe extremely careful during write operations such
as copying, saving, or formatting.Drives in the
computer that you are servicing might have been
rearranged or the drive startup sequence might have
been altered. If you select...

Before checking problems with the computer, determine
whether the damage is covered under the warranty by
referring to the following:
Note for Warranty:For Warranty:
During the warranty period, the customer may be
responsible for repair costs if the computer damage
was caused by misuse, accident, modification,
unsuitable physical or operating environment, or
improper maintenance by the customer. The
following list provides some common items that are
not covered under warranty and some symptoms
that may...

FRU replacement notices
This section contains notices for removal and replacement.
Read this section carefully before replacing any FRU.
LCD replacement notice
The TFT LCD for the computer contains many thin-film
transistors (TFTs). A small number of missing, discolored,
or lighted dots (on all the time) is characteristic of TFT
LCD technology, but excessive pixel problems can cause
viewing concerns. The LCD should be replaced if the
number of missing, discolored, or lighted dots in any
background is:...

Turn an additional180 degreesafter the screw head
touches the surface of the plastic part:
vTorque driver
If you have a torque driver, refer to the″Torque″column
with each step.
vMake sure you use the correct screw, and tighten all
screws firmly to the torque shown in the table if you
have a torque screwdriver.Never use a screw that you
removed. Use a new one. Make sure the screws are
tightened firmly.
System board/LCD/Inverter replacement
notice
Restoring the LCD panel IDThe EEPROM on the inverter...