IBM Workpad Z50 Mobile Companion Manual

xii IBM W orkPad z50, Mobile Companion xii
Safety Information
The following s ection c ontains the s af ety information that
you need to be f amiliar with bef ore s ervicing an IBM mobile
computer.
General Safety
Follow these rules to ensure general safety:
·
  Obs erve good hous ekeeping in the area of the
machines during and after maintenanc e.
·
  W hen lifting any heavy objec t:
1.  Ensure you c an stand safely without slipping.
2.  Distribute the weight of the object equally
between your f eet.
3....

© Copyright IBM Corp. 1998 xiii
Electrical Safety
Obs erve the f ollowing rules when working on electric al
equipment.
Important
Use only approved tools and test equipment.  Some hand
tools have handles c overed with a s oft material that does
not insulate you when working with live electrical currents.
Many customers have, near their equipment, rubber floor
mats that c ontain small c onductive fibers to decreas e
electrostatic discharges .  Do not us e this type of mat to
protect yours elf from electric...

xiv IBM W orkPad z50, Mobile Companion xiv·
  Regularly inspect and maintain your electrical hand
tools for s af e operational c ondition.
·
  Do not us e worn or broken tools  and testers.
·
 
Never assume that power has been disc onnec ted
from a circuit.  First, check that it has been powered-
off.
·
  Always look carefully for possible hazards in your
work area.  Examples  of thes e hazards are moist
floors, nongrounded power extension c ables, power
surges, and missing s af ety grounds.
·
  Do not...

© Copyright IBM Corp. 1998 xv The guide c onsists of a s eries of steps pres ented in a
checklist.  Begin the checks with the power off, and the
power cord disconnected.
Checklist:
1. Check exterior c overs for damage (loos e, broken, or
s h arp  edg es ).
2. P ower - of f  th e c om p ut er .  Disconnect the power
cord.
3. Check the power cord f or:
a.  A third-wire ground c onnec tor in good
condition.  Us e a meter to measure third-wire
ground c ontinuity f or 0.1 ohm or less between
the external...

xvi IBM W orkPad z50, Mobile Companion xvi
Handling Electrostatic
Discharge-Sensitive Devices
Any c omputer part c ontaining transistors or integrated
circuits (Ics) should be c onsidered s ensitive to electrostatic
discharge (ESD).  ESD damage can occur when there is a
differenc e in charge between objects.  Protect against ESD
damage by equalizing the charge so that the machine, the
part, the work mat, and the pers on handling the part are all
at the s ame c harge.
Notes
1. Use product-spec ific ESD...

W orkPad z50 Mobile Companion 1
WorkPad z50 Mobile Companion (2608)
Read This First
Bef ore you go to the c heckout guide, be s ure to read this
section.
Important
·
 Only certified trained personnel should service
the computer.
·
  Read FRU s ervic e proc edures  bef ore replacing
any FRUs.
·
 Replace FRUs only for the correct model.
When you replace the FRU, make sure the model
of the machine and FRU part number are c orrec t
by referring to the parts list.
·
 FRUs should not be replaced because of a...

2 IBM W orkPad z50, Mobile Companion 2
Screw Tightening Information
Loos e screws c an c aus e reliability problems.  The IBM
W orkPad z50 address es this problem with nylon c oated
screws.  Tighten screws as follows:
Plastic to Plastic
Turn an additional 90 degrees af ter the screw head
touches the surface of the plastic part.
90 Degrees More
Plastic
Logic card to Plastic
Turn an additional 180 degrees after the screw head
t ouc h es  t h e s urf ac e of  t h e l og ic  c ard .
180 Degrees More
Plastic...

W orkPad z50 Mobile Companion 3 Attention
Pushing the W orkPad z50’s Power button will power on
(or res ume) the s ystem, or put the s ystem in sus pend
mode: there is no power-off state.
If the AC Adapter, battery pack, and backup battery are
removed, the s ystem is res et and all the stored data is
lost.  There is no lithium battery to retain memory while
thes e power s ourc es are removed.
What to Do First:  The s ervic e pers onnel must fill in the
following information in the parts exchange form or...

4 IBM W orkPad z50, Mobile Companion 4The following symptoms might indicate damage
caused by non warranted activities:
Missing parts may be a symptom of unauthorized service
or modific ation.
Attention
W hen res etting the s ystem, all programs  and stored data
other than the operating s ystem will be eras ed.
Any pass word that is s et f or testing purpos es s hould be
dis abled bef ore returning the W orkPad z50 to the
customer. 

W orkPad z50 Mobile Companion 5
Product Overview
Refer to the f ollowing table f or an overview of the s ystem
features  of the W orkPad z50 Mobile Companion:
Feature Description
Processor NEC VR4121
Chipset NEC VRC4171A
Graphic/Video
ControllerITE IT8181
OS/APP ROM 20MB (32MB Japan)
Memory 16MB Upgradable to 48MB
Storage Memory CompactFlash Type II socket
PC Card One type III slot
I/O Ports RJ-11 Modem port (US/Canada/
Japan models only)
Infrared
Serial port
External dis play port
Cradle connector
Audio...