IBM Workpad Z50 Mobile Companion Manual

26 IBM W orkPad z50, Mobile Companion 26
Intermittent Problems
Intermittent s ystem hang problems  c an be c aus ed by a
variety of reasons that have nothing to do with a hardware
defect, such as: cosmic radiation, electrostatic discharge, or
software errors.  FRU replac ement s hould be c onsidered
only when a rec urring problem exists.
W hen analyzing the intermittent problem, do the f ollowing:
1. Run the diagnostic test f or the mainboard in loop
mode.
2. If no error is detected, do not replac e any...

W orkPad z50 Mobile Companion 27
Running the Diagnostics
The following table lists the s pecial tools us ed in the
diagnostics:
Tool Name FRU P/N
Serial wrap c onnec tor 05K2846
PCMCIA wrap c ard 35G 4703
CompactFlas h wrap c onverter 05K2845
Use either the TrackPoint or the curs or move keys to interac t
with the tests.  The Enter key works the same as selecting
the OK ic on to reply OK.
1. Click Start, then Run.  In the Run” dialog window
Open box, type “\W indows\ibmdiag.exe”.  Click OK.
The bas ic...

28 IBM W orkPad z50, Mobile Companion 28
UUID
A UUID (universal unique ID) is uniquely assigned to each
system board f or s ys tem management purpos es.  The UUID
is stored on the EEPRO M on the board.
Related Service Procedures
This section provides inf ormation about the following:
·
 “Status Indic ators and Control Buttons”
·
  “Applic ation Launching Key Assignments” on page 29
Status Indicators and Control Buttons
The s ystem status indic ators show the current W orkPad z50
status in different c...

W orkPad z50 Mobile Companion 29
Application Launching Key Assignments
The applic ations keys  are programmed to launc h pres et
software applic ations.  The following table shows the
applic ation keys and their c orresponding functions:
Key Description
A1 Launch or s witch to the W indows CE Inbox
A2
Launch W indows Explorer or s witch to next
Explorer W indow
A3 Launch or s witch to Calendar
A4 Launch or s witch to Contacts
A5 Launch or s witch to T as ks
A6
Launch Poc ket W ord or switch to next Poc...

30 IBM W orkPad z50, Mobile Companion 30
Removing and Replacing Defective FRUs
This section provides inf ormation on removing and replacing
FRUs.
·
  Do not damage any part.  Only certified and trained
pers onnel should s ervic e the W orkPad z50 Mobile
Companion.
·
 The arrows in the “Removals and Replac ements”
section show the direction of movement to remove a
FRU, or to turn a screw to release the FRU.  The
arrows are marked in numeric order, in square
callouts, to show the c orrect s equenc e of...

W orkPad z50 Mobile Companion 31 An electrostatic discharge (ESD) strap (P/N 6405959) must
be us ed to establish pers onal grounding. 

32 IBM W orkPad z50, Mobile Companion 32
Important Notice
The W orkPad z50 Mobile Companion us es spec ial nylon-
coated screws with the f ollowing c harac teristics:
·
  They maintain tight c onnec tions.
·
  They do not easily c ome loos e, even with shoc k or
vibration.
But:
·
  They need additional forc e to tighten.
·
  They s hould be us ed only onc e.
Do the f ollowing when you s ervic e this mac hine:
·
  Keep the screw kit (P/N 05K5941) in your tool bag.
·
  Always us e new screws.
·
  Use a...

W orkPad z50 Mobile Companion 33
Unplugging and Plugging Flexible Cables:
Two types of c able and c onnec tors are us ed in the W orkPad
z50.  Some c onnec tors have a c lasp, which must be
unlocked before removing the cable.  Unlock the connector
by pulling up the clas p with your fingernail or a small flat-
tipped screwdriver.  Then pull out the c able from the
connec tor.  Ref er to the following illustrations: 

34 IBM W orkPad z50, Mobile Companion 34
Removal reference
The chart below s hows the order f or removing FRUs.  W hen
a FRU has  been removed, f ollow the arrows to the FRU (or
FRUs) that can be removed next.
1010 Backup Batteries
1020 RO M/DRAM Card
1030 Battery Pack
1040 Keyboard Assembly
1050 Bottom Cover
1060 Mainboard
1070 LCD Bezel
1080 LCD Unit
1090 Inverter Card and LCD
Panel
1120 Speaker
1130 Microphone
1150 PC Card Slot Assembly
1170 Hardware Button Board
1110 FPC Assembly
1160 RJ-11 Ass...

W orkPad z50 Mobile Companion 35
1010  Backup Batteries
1.Turn the W orkPad z50 upside down.
Step Size (Quantity) Color Torque Length
2
Coin screw
M2.5 (1)Black 3 kgcm 4.0 mm
Note:  You c an loos en the c aptive screw in step 2
, but
cannot remove it from the bac kup battery c over.