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ITS
co
om
E331 .E2501.061.21.02.02
System SIRECUST 1280/1281
Bedside Monitor - Service Manual
NOTE:
it is tolerabie for the display size
to vary following initial power up, while the
high voltage is stabilizing.
1.
Check high voltage and adjust if
necessary
(refer
to
Chapter
7,
Section 7.2).
2.
If
display
size
continues
to
fluctuate
replace
Z-Amp
Board.
Proceed to Functional Verification,
Chapter 5.
6.7R.xiii
Blinking
1.
Refer
to
Section
6.7R.v,
Steps
1-2.
2.
İf
unable
to
correct
problem,
replace Z-Amp Board.
Proceed to
Functional Verification, Chapter 5.
6.7S.
Digital I/O Problem
This Section applies when a problem is
observed
with
the
digital
I/O
signals
(ALARM OUT, SYNC OUT, etc.) at ALARM
connector X10 on rear panel of monitor.
1.
Perform
digital
I/O
functional
verification
test.
Refer
to
Chapter 5.
Does
monitor
pass
test?
<
to touch panel
Figure 6-2.
TouchScreen Connector
* Yes:
Problem is external to the |
monitor.
ㆍ No:
Replace
Curve
Board.
Proceed
to
Functional
Verification, Chapter 5.
6.8
Curve Board Test
Figures
6-20
and
6-21
depict
typical
Curve
Board
outputs for the Deflection
and Z-Amp
Boards.
To view these sig-
nals, set the oscilloscope for 2V/div. and
5ms/div. Use the signal at X7-9 for trigger.
NOTE:
These signals should be checked
prior to replacement of any other display
subsection board.
NOTE:
To determine pin 1 on each con-
nector,
locate the square
solder
pad
on
the solder side of the board, or refer to
Figure 6-22.
Voltage levels of signals may vary slightly,
but should remain within the limits speci-
fied in Figure 6-23.
NOTE:
The number of pulses present on
the BLANKING
signal
during the
raster
mode depends on the display. Additional
pulses
may
be
present
on
the
the
BLANKING and Z signals (depending on
the display).
Coding
1
—
to operator interface board (X2)
Page 6 - 27
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