IBM 4846-545 Service Guide - Page 43

Table, Symptoms, actions, continued - keyboard drivers

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Table 11. Symptoms and actions (continued) Cash drawer does not open or close smoothly, or appears to be binding. 1. Look for items that could cause binding. Pens or paper clips trapped between the drawer and cover or the drawer and base could cause binding. 2. Compact drawer only: Remove the drawer and the rollers at the rear of the drawer and at the front of the base. Replace the rollers if necessary. 3. Determine if the slide assembly in the base is binding. Replace the slide assembly if necessary. Cash drawer not opening 1. Run the CMOS Setup Utility to make sure that IBM cash drawer setting is enabled. 2. Ensure that the cash drawer cable is securely connected. 3. Replace the cash drawer cable. 4. Replace the cash drawer latch assembly. 5. Replace the system board. Cash drawer does not open when 1. Replace the latch and the sensor assembly card. performing store transactions or running cash drawer tests, but it opens 2. Replace the cash drawer cable. when the cash drawer key is turned to 3. Replace the system board. See "System board - removing and replacing" the open position. on page 49. The status displayed by the cash drawer tests does not match the physical status of the cash drawer being tested. For example, the test indicates that cash drawer A is closed when cash drawer A is actually open. 1. Replace cable. 2. Replace the latch and the sensor assembly card. 3. Replace the system board. See "System board - removing and replacing" on page 49. Magnetic stripe reader (MSR) not reading. 1. Check the three-track MSR dip switch settings for either RS232 or keyboard interface. 2. Run the CMOS Setup Utility and check the setting in the MSR serial port. 3. Ensure that the MSR cable is securely connected. 4. Run the MSR test using the diagnostic service program. 5. Reset to factory defaults by pressing the Reset button with a paper clip. The MSR must be removed temporarily from the side of the tablet to access the reset button. Leave the MSR cable connected, and the unit powered ON when pressing the Reset button. 6. Replace the MSR. See "Magnetic stripe reader (MSR) - removing and replacing" on page 58. Operator display backlight: dark, dim, or partially lit. 1. Adjust the brightness using the button located on the front of the display. 2. Ensure tablet display cable is securely attached under display tablet and at system board. 3. Replace the LCD assembly, see "Front bezel and LCD assembly removing and replacing" on page 36. Touch screen not working. 1. Ensure tablet display cable is securely attached under display tablet and at system board. 2. Run the touch screen test using the diagnostic service program. 3. Reinstall the touch driver. 4. Replace the front touch bezel assembly. See "Front bezel and LCD assembly - removing and replacing" on page 36. 5. Replace the system board. See "System board - removing and replacing" on page 49. Chapter 2. Running diagnostics and troubleshooting 21

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Table
11.
Symptoms
and
actions
(continued)
Cash
drawer
does
not
open
or
close
smoothly,
or
appears
to
be
binding.
1.
Look
for
items
that
could
cause
binding.
Pens
or
paper
clips
trapped
between
the
drawer
and
cover
or
the
drawer
and
base
could
cause
binding.
2.
Compact
drawer
only:
Remove
the
drawer
and
the
rollers
at
the
rear
of
the
drawer
and
at
the
front
of
the
base.
Replace
the
rollers
if
necessary.
3.
Determine
if
the
slide
assembly
in
the
base
is
binding.
Replace
the
slide
assembly
if
necessary.
Cash
drawer
not
opening
1.
Run
the
CMOS
Setup
Utility
to
make
sure
that
IBM
cash
drawer
setting
is
enabled.
2.
Ensure
that
the
cash
drawer
cable
is
securely
connected.
3.
Replace
the
cash
drawer
cable.
4.
Replace
the
cash
drawer
latch
assembly.
5.
Replace
the
system
board.
Cash
drawer
does
not
open
when
performing
store
transactions
or
running
cash
drawer
tests,
but
it
opens
when
the
cash
drawer
key
is
turned
to
the
open
position.
1.
Replace
the
latch
and
the
sensor
assembly
card.
2.
Replace
the
cash
drawer
cable.
3.
Replace
the
system
board.
See
“System
board
–
removing
and
replacing”
on
page
49.
The
status
displayed
by
the
cash
drawer
tests
does
not
match
the
physical
status
of
the
cash
drawer
being
tested.
For
example,
the
test
indicates
that
cash
drawer
A
is
closed
when
cash
drawer
A
is
actually
open.
1.
Replace
cable.
2.
Replace
the
latch
and
the
sensor
assembly
card.
3.
Replace
the
system
board.
See
“System
board
–
removing
and
replacing”
on
page
49.
Magnetic
stripe
reader
(MSR)
not
reading.
1.
Check
the
three-track
MSR
dip
switch
settings
for
either
RS232
or
keyboard
interface.
2.
Run
the
CMOS
Setup
Utility
and
check
the
setting
in
the
MSR
serial
port.
3.
Ensure
that
the
MSR
cable
is
securely
connected.
4.
Run
the
MSR
test
using
the
diagnostic
service
program.
5.
Reset
to
factory
defaults
by
pressing
the
Reset
button
with
a
paper
clip.
The
MSR
must
be
removed
temporarily
from
the
side
of
the
tablet
to
access
the
reset
button.
Leave
the
MSR
cable
connected,
and
the
unit
powered
ON
when
pressing
the
Reset
button.
6.
Replace
the
MSR.
See
“Magnetic
stripe
reader
(MSR)
–
removing
and
replacing”
on
page
58.
Operator
display
backlight:
dark,
dim,
or
partially
lit.
1.
Adjust
the
brightness
using
the
button
located
on
the
front
of
the
display.
2.
Ensure
tablet
display
cable
is
securely
attached
under
display
tablet
and
at
system
board.
3.
Replace
the
LCD
assembly,
see
“Front
bezel
and
LCD
assembly
-
removing
and
replacing”
on
page
36.
Touch
screen
not
working.
1.
Ensure
tablet
display
cable
is
securely
attached
under
display
tablet
and
at
system
board.
2.
Run
the
touch
screen
test
using
the
diagnostic
service
program.
3.
Reinstall
the
touch
driver.
4.
Replace
the
front
touch
bezel
assembly.
See
“Front
bezel
and
LCD
assembly
-
removing
and
replacing”
on
page
36.
5.
Replace
the
system
board.
See
“System
board
–
removing
and
replacing”
on
page
49.
Chapter
2.
Running
diagnostics
and
troubleshooting
21