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E331.E2501.061.21.02.02
System SIRECUST 1280/1281
Bedside Monitor - Service Manual
OFF
immediately
to
prevenipossible
damage to the CRT.
1.
Check Curve Board output signals
VERTICAL
(X7-1) and
HORIZON-
TAL (X7-4). Refer to Section 6.8.
Are signals okay?
* Yes:
Continue.
+ No:
Replace
Curve
Board.
Proceed
to
Functional
Verification, Chapter 5.
2.
Check
Curve/Deflection
Boards
harness for continuity between X7
of Curve Board and X2 of Deflec-
tion
Board.
Refer
to
the
appropriate
monitor
wiring
diagram
in Appendix
B,
Figure
B-1.1 or B-1.2.
Replace wiring harness if bad.
If
unable
to
correct
problem,
replace Deflection Board.
Proceed to Functional Verification,
Chapter 5.
6.7R.vii.
Oversized Display
1.
"Is correct software installed?
+ Yes:
Continue.
* No:
Replace
software.
Proceed
to
Functional
Verification,
Chapter 5.
2.
Check high voltage and adjust if
necessary.
Refer to Chapter
7,
Section 7.2. lf unable to restore
proper
display,
refer to Section
7.3.
6.7R.viii.
Poor Alignment
Refer to Chapter 7, Section 7.3 for
procedures in Display Adjustment.
6.7R.ix.
Blanking Problem
This Section applies if the display is not
being blanked properly during retrace, or
if the display is being blanked at improper
times (during periods other than retrace).
1.
Set
monitor
to
display
the
alignment
test
pattern.
Check
BLANKING
signal
on
ZAmp
Board; refer to step 6.7R.v.2.
Is BLANKING signal okay?
e Yes:
Replace
Z-Amp
Board.
Proceed | to
Functional
Verification, Chapter 5.
+ No:
Check
wiring
harness
for
continuity
between
X8
on
Curve
Board
and X1/X2 on
Z-Amp
Board. .Refer to the
appropriate
monitor
wiring
diagram
in
Appendix
В,
Figure B-1.1 or B1.2.
Replace
Curve/Deflection
Board
harness
if bad.
Jf
problem
is
corrected,
proceed
to
Functional
Verification, Chapter 5.
lf unable to correct problem,
replace
Curve
Board.
Proceed
to
Functional
Verification, Chapter 5.
6.7R.x.
Glitches in Display
Replace Curve Board. If glitches
are still present in display, replace
Deflection.
Board.
Proceed
to
Functional Verification, Chapter 5.
6.7R.xi.
Curves Jittering
Refer to Section 6.7R.x.
6.7R.xii.
Display Size Fluctuating
This Section applies if display size contin-
ually varies.
Page 6 - 26
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