Datex-Ohmeda CAPNOMAC ULTIMA, Service Manual

Page: 216 / 232

DATEX CAPNOMAC ULTIMA
TM
SERVICE MANUAL
6-22
6.4.11 PVX board troubleshooting
See the following flow charts to troubleshoot the PVX board.
NOTE: Pressure transducers B1 and B2, and EEPROM D4 are
replaced only at the factory.
NOTE: Never apply overpressure or negative pressure of more
than 300 cmH
2
O to the flow and volume tubing.
M O N I T O R D O E S N O T
R E C O G N I Z E P V X B O A R D
C H E C K C R Y S T A L Z 1 .
C H E C K S U P P L Y V O L T A G E S .
C H E C K M I C R O P R O C E S S O R D 5 .
C H E C K I C s D 5 , D 1 2 , A N D D 1 .
I S P I N 1 1 O F D 2 O N P O W E R
S U P P L Y B O A R D C U T O F F I F
M O T H E R B O A R D I D - C O D E L E V E L
I S 3 O R L O W E R ?
I S S H O R T I N G P I N X 1 7 R E M O V E D
F R O M M O T H E R B O A R D I F T H E B O A R D ’ S
I D - C O D E L E V E L I S 4 O R H I G H E R ?
C H E C K C P U B O A R D
I C s D 1 5 . D 1 2 . A N D D 1 .
Z E R O E R R O R
I N S T A L L T H E T U B E S P R O P E R L Y
E N T E R S E R V I C E M O D E
C H E C K V A L V E S Y 1 A N D Y 2 .
C H E C K T R A N S I S T O R V 4 .
P R O C E S S O R D 5 P I N 6 S H O U L D
B E H I G H ( + 5 V ) W H E N T H E V A L V E S
A R E I N O N P O S I T I O N A N D L O W
W H E N I N O F F P O S I T I O N .
CHECK PRESSURE TRANSDUCER 82.
C H E C K A M P L I F I E R S A 6 A N D A 7 .
CHECK MULTIPLEXER A9.
CHECK PRESSURE TRANSDUCER B1
CHECK -10 Vref.
CHECK AMPLIFIERS A3, A4, A5, ANC
CHECK MULTIPLEXER A9.
T R Y Z E R O I N G A G A I N
September 1st, 1992/2
D I G I T A L V A L U E S O F P R E S S U R E A N D V O L U M E
A R E O K , B U T W A V E F O R M S A R E M I S S I N G
C H E C K D / A C O N V E R T E R A l .
C H E C K M U L T I P L E X E R A 9 .
C H E C K A M P L I F I E R S A 7 A N D A 8 .
I S P V X B O A R D I N S T A L L E D C O R R E C T L Y
O N T H E
M
O T H E R B O A R D ?
I S M O T H E R B O A R D F A U L T Y ?
C H E C K C P U B O A R D .
C A L E R R O R
I N S T A L L T H E T U B E S P R O P E R L Y
T R Y C A L I B R A T I O N A G A I N
P U M P V E R Y S L O W L Y .
C H A N G E T H E D - L I T E A D A P T E R .
C A L I B R A T E A G A I N B Y
P U M P I N G F U L L V O L U M E .
P U M P V E R Y S L O W L Y .