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E331 .E2501 .061.21.02.02
System SIRECUST 1280/1281
Bedside Monitor - Service Manual
* No:
Replace
Display
Processor
Board, and proceed to Func-
tional Verification, Chapter 5.
2.
Turn power OFF.
6.71.
Disconnect battery connector X1
from
connector
JP1
on
Battery
Board. Use an oscilloscope or a
DVM to check the battery charge
signal, BATR+, at JP1, pin 2.
When
monitor
power
is turned
ON,
the
piezo
alarm
will
sound
after several seconds.
Does
BATR+
rise to +15V
after
piezo alarm sounds?
Yes:
Replace
battery.
Proceed
to
Functional
Verification,
Chapter 5.
No:
Replace
Battery
Board
with
Memory
Backup
Board,
A933, and proceed to Func-
tional Verification, Chapter 5.
Turn power OFF. Set up DVM
or
oscilloscope to check voltage at
TP1 on Memory Backup Board.
Turn power ON.
+5V should be
present at TP1.
Turn
power
OFF.
TP1
should
remain
at +5V for a minimum
of
10 minutes.
If voltage levels measured at TP1
are
improper,
replace
Memory
Backup
Board,
and
proceed
to
Functional Verification, Chapter 5.
TouchScreen Drifting or Not
Functioning Properly
Initiate TouchScreen
calibration
by pressing anywhere in the left
half of the TouchScreen
imme-
diately following power up self-
tests.
. Yes:
2.
. Yes:
Follow
screen
prompts
for
calibrating TouchScreen.
Does the TouchScreen calibrate
properly?
Go to Step 4.
No:
Continue.
Does the monitor have an A292
Operator Interface Board, Art. No.
12 66 308 E2500 installed?
Continue.
No:
Check solder side of board
for label indicating that ECO
#5214,
#5216,
or
#5217
(TCH
SCREEN
WATCHDOG
upgrade) has been installed.
if
not,
install
TouchScreen
Watchdog
upgrade.
Order
upgrade
kit Art.
No.
12 66
431 E2500). If problem is cor-
rected, proceed to Functional
Verification, Chapter 5.
If problem
is not corrected,
continue.
3.
TouchScreen Test:
a.
b.
ο.
Turn power OFF.
Remove
Front Panel. .
Disconnect
the
TouchScreen
from
the
Operator
Interface
Board at X2.
Using
a
DVM,
measure
the
resistance
across
each
of the
pin combinations
indicated
in
Table
6-5.
Press
the
Touch-
:
Screen, and compare readings
when
you
are
pressing
the
TouchScreen to readings when
you
are
not
pressing
the
TouchScreen.
Page 6 - 16
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