ABG Service Manual - English 004866-901R4

\EDIC@

Cat. No. 6502

EasyBloodGas

ServiceMan

ual

ANALYZE QC

1 LEVEL 1

2 LEVEL 2

3 LEVEL 3

4 PROFICIENCY

CALIBRATE

CALIBRATIONSCREENS

LIFT SAMPLER TOANALYZE

pH PCO2 PO

2

HOME MENU

1 ANALYZE SAMPLE

2 ANALYZE QC

3 CALIBRATE

4 DAILY CLEANER

5 SECOND MENU

MANUAL STANDBY

CONFIRM?

HOME MENU

1 *

2 *

3 CALIBRATE

4 DAILY CLEANER

5 SECOND MENU

STORED INFORMATION

1 PATIENT RESULTS

2 QC RESULTS

3 REFERENCE LIMITS

4 CALIBRATION DATA

5 REAGENT MODULE

6 PRINTOUTS

TEST COMPONENTS

1 PUMP

2 VALVE

3 SAMPLER SWITCHES

4 DOOR SWITCH

5 REAGENT READER

TEST FLUIDICS

1 FLOW

2 BUBBLE DETECTOR CAL

3 PUMP CAL

SENSOR STATUS

1 ELECTRODE mVs

2 BAROMETRIC PRESSURE

3 TEMPERATURE

PATIENT RESULTS

1 LAST

2 ALL

3 ENTER ID#

QC RESULTS

1 LAST CONTROL

2 PRINT QC STATS

3 PLOT QC CHARTS

REFERENCE LIMITS

1 QC LEVEL 1

2 QC LEVEL 2

3 QC LEVEL 3

4 NORMAL

5 CRITICAL

CALIBRATION DATA

1 SLOPES

2 mVs

3 PUMP/BUBBLE DETECTORS

REAGENT MODULE

1 STATUS

2 CONCENTRATIONS

PRINTOUTS

1 USER OPTIONS

2 CONFIGURATION

3 PRINTER OPTIONS

4 PATIENT LIMITS

5 QC LIMITS

6 PATIENT INFORMATION

ELECTRODE mVs

1 CALIBRANT A mVs

2 CALIBRANT B mVs

LAST CONTROL

1 LEVEL 1

2 LEVEL 2

3 LEVEL 3

PRINT QC STATS

1 LEVEL 1

2 LEVEL 2

3 LEVEL 3

4 ALL LEVELS

PLOT QC CHARTS

1 pH

2 PCO23 PO24 ALL CHARTS

SET REFERENCE LIMITS

1 QC LEVEL 1

2 QC LEVEL 2

3 QC LEVEL 3

4 NORMAL

5 CRITICAL

DELETE DATA

1 ALL QC LEVEL 1

2 ALL QC LEVEL 2

3 ALL QC LEVEL 3

4 ALL QC LEVELS

5 ALL PATIENT RESULTS

PATIENT INFORMATION

1 PATIENT ID OFF

2 PATIENT TEMP OFF

3 Hb OFF

4 FIO2 OFF

5 TIME DRAWN OFF

6 OPERATOR ID OFF

Default off

SECURITY CODE

CONFIRM?

* * * *

CALIBRATE

CALIBRATIONSCREENS

DAILY CLEANER

DAILY CLEANERSCREENS

SECOND MENU

1 STANDBY

2 REPLACE COMPONENTS

3 DIAGNOSTICS

4 STORED INFORMATION

5 SETUP MENU

6 ADJUST DISPLAY

DAILY CLEANER

DAILY CLEANERSCREENS

SECOND MENU

1 STANDBY


3 DIAGNOSTICS


5 SETUP MENU

6 ADJUST DISPLAY

REPLACE COMPONENTS

1 REAGENT MODULE

2 ELECTRODES

3 PUMP TUBING

4 SENSOR MODULE/SAMPLER

5 VALVE MODULE

DIAGNOSTICS

1 TEST COMPONENTS

2 TEST FLUIDICS

3 SENSOR STATUS

4 PRIME FLUIDS

SETUP MENU

1 USER OPTIONS

2 CONFIGURATION

3 PRINTER OPTIONS

4 SET REFERENCE LIMITS


6 DELETE DATA

ADJUST DISPLAY

1 BRIGHTNESS2 BRIGHTNESS3 REVERSE

USER OPTIONS

1 DATE/TIME

2 LANGUAGE

3 CORRELATION


5 SECURITY CODE

PRINTER OPTIONS

1 PRINTER ON2 CALD VALUES ON3 PRINTOUTS (x2) OFF

CONFIGURATION

1 CAL FREQUENCY 8 HRS

2 AUTO STANDBY OFF

3 PO2/PCO2/BP mmHg

4 TEMPERATURE C

5 Hb g/dL

Software Flow Chart

Table of Symbols

Important information

Conditions which may cause data loss or analyzer malfunction

Biohazard warning

Electrical hazard

2001 Medica Corporation

i

Software Flow Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .inside front coverTable of Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .i

Product Description

System Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1Sensor Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2Sampler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2Valve Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3Printer Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3CPU Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3Pre-Amp Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4Pump Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4Contact Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5Display Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5Valve Module Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6Rear Housing Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6Replacement List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Troubleshooting

Troubleshooting Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8Troubleshooting Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8AC Power Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9DC Power Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10Display Assembly Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11Sensor Module Heat Control Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12Valve Module Heat Control Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13Printer Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13Pump Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14Valve Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14Electrode Signal Input Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15Serial Communication Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Repair

Service Manual Contents

Repair Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

Required Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

Rear Housing Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

Rear Housing Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

Printer Assembly Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

Printer Assembly Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

Display Assembly Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

Display Assembly Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

CPU Assembly Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

CPU Assembly Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

Flash Device Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

Flash Device Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

Printer EPROM Removal and Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

Access Door Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

Access Door Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

Pre-Amp PC Board/Contact Housing Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

Pre-Amp PC Board/Contact Housing Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

Valve Cable Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

Valve Cable Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

Pump Assembly Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

Pump Assembly Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

Sampler Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

Sampler Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

In-field Reprogrammability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

P R O D U C T D E S C R I P T I O N N

1

System Overview

The repairs and procedures in this manual are intended for authorized field serviceengineers. Instructions describe the repair or replacement of all modular internalcomponents. It is recommended that the field service engineer also refer to the OperatorsManual for detailed instructions on operating and troubleshooting the analyzer to determineif repair or replacement is necessary for an internal component. The Replacement Listindicates assemblies and components available to the field service engineer. Refer to theRepair section of this manual for the CPU schematic. Before performing any service, thereagent module must be removed.

All components should be considered biohazardous (contaminated with HIV orother pathogens).

Any replaceable component which comes in contact with biological samples,including the sampler, electrodes, sensor module, pump tubing, valve module andreagent module may contain contaminated material. Treat all components, duringuse and disposal, as you would any biohazardous material.

2P R O D U C T D E S C R I P T I O N N

Sensor Module Contains heat control circuitry, sampler positionsensors, bubble detectors, door sensor, sampler, andcompression plate. The electrodes (PO2, PCO2, pH,reference) are housed in the sensor module.

SamplerAttached to sensor module. Contains sample probewith probe wiper. The sampler is removable from thesensor module as a replacement part.

3P R O D U C T D E S C R I P T I O N

Valve ModuleControls reagent (from reagent module) or airselection. The valve module contains a ceramic valve,motor, position detector and reagent preheater. Thereare no serviceable parts inside the valve module.

Printer AssemblyContains the printer mechanism, printer software, andprinter electronics. Prints analysis, calibration anddiagnostic data.

CPU AssemblyContains transformer, software, inputs (electrodes,barometric pressure, room temperature), motorcontrol circuitry, sensor module heat control, and 2serial ports.

4Pre-amp PC BoardConnects contact housing to the CPU assembly andamplifies electrode signals.

Pump AssemblyContains peristaltic pump with wire connector.


5Contact HousingContains all contacts from the electrodes, as well asthe contact housing cable for connection to the CPUassembly.

Display Assembly(Analyzer operator interface.) Contains operatorkeypad and LCD display.


6P R O D U C T D E S C R I P T I O N N

Valve Module CableConnects valve module to the CPU board.

Rear Housing AssemblyRear housing contains the printer paper bay andcover, serial number label, and the openings for thefuse holder, AC power cord socket, battery connec-tion, RS-232 serial interface connection, barcodereader connection, and power voltage setting.

7P R O D U C T D E S C R I P T I O N

Replacement ListThe items on this list are available for purchase fromMedica Corporation.

Description Catalog Number

*Access Door (manufactured before April 2001) 6509

Access Door 6541

Barcode Reader 6520

Cable, Contact Housing 6514

Cable, Valve Module 6516

Compression Plate 6508

*Contact Housing (manufactured before April 2001) 6515

*CPU Assembly (manufactured before April 2001) 6517

*Display Assembly (manufactured before April 2001) 6511

Contact Housing 6538

CPU Assembly 6539

Display Assembly 6540

Operators Manual 6501

pH Electrode 6201

PCO2 Electrode 6202

PO2 Electrode 6203

Pump Assembly 6513

Reagent Module 6101

Reference Electrode 6204

Printer Assembly 6510

Pump Tubing 6504

Sampler 6306

Sensor Module 6506

Serial Cable 6518

Service Manual 6502

Valve Module 6507

110V Barcode Reader Power Supply 6524

220V Barcode Reader Power Supply 6525

Pre-Amp PC Board 6536

*Before ordering replacements, contact Medica Technical Service

8T R O U B L E S H O O T I N G G

Action StepsProblem/Description Problem Source Corrective Action Steps

Blank display/No response Power malfunction AC power verificationDefective display DC power verification

Display assembly verificationEPROM verification

Sensor module temperature not at Sensor module failure Check sensor module heat control37.0 + 0.1C CPU assembly failure verification

Valve module temperature not Valve module failure Check valve module heat control at 36 41C CPU assembly failure verification

Printer does not print Printer malfunction Printer verification

No pump movement Pump motor malfunction Pump verification

No valve movement Valve motor malfunction Valve verification

Electrode voltages out of Electrodes or signal input Check sensor module installationspecification malfunction and performance

Electrode signal input verification

Serial transmission failure Serial cable Serial communication verificationTransmission Protocol

Troubleshooting Overview

This section describes troubleshooting the mechanicaland electrical functions of the EasyBloodGasanalyzer. Medica recommends that dealers maintainan inventory of operational test assemblies fortroubleshooting purposes. These test assemblies cansubstitute the questionable assemblies to confirmfailures. Only those items listed on the ReplacementList are available for purchase. For information ontroubleshooting the fluidic system and electrodes,refer to the EasyBloodGas Operators manual.

Run quality control material after anytroubleshooting procedure.

Troubleshooting GuideDetermine the problem and corrective action needed.

9T R O U B L E S H O O T I N G

F0.8 or F0.4

AC Power VerificationWhen the power is first turned on, the EasyBloodGasanalyzer will beep, and the display will light up. Ifthis fails to happen, follow the verification procedurein this section. Review this entire section beforereplacing any components. First confirm that thepower cord is inserted securely inside the AC powercord socket.

Warning: Careless handling of AC power,especially 220V, can be hazardous orfatal. Only qualified personnel shouldwork with AC power.

1 Remove the power cord from the AC power cordsocket.

2 Verify that the voltage selector switch voltagesetting (110V or 220V) matches the power outletvoltage. If it does not, correct the setting.

3 Verify that the fuses have the correct rating. Pushdown on the fuse holder release tab and pull thefuse holder straight out. Inspect both fuses.

For 110V analyzers, the fuses must be rated0.8A, 250 volts

For 220V analyzers, the fuses must be rated0.4A, 250 volts

110

220

110

220

or

AC Power Cord Socket

Factory-set Power Voltage Setting

\EDIC@

EasyBloodGas

004434-001 R0

SERIAL NO.

Blood Gas AnalyzerFor in vitro diagnostic use only.Patents PendingManufactured in USA by Medica CorporationBedford, Massachusetts 01730

100-115~VAC0.8A

50/60 Hz

220~VAC0.4A

50/60 HZ!

Max pumpworking pressure:15PSI

NOTE:For 100-115 VACoperation, thevoltage selectswitch marked110 and 220 mustbe in the 110position.

C78559

ETL LISTEDCONFORMS TOUL STD 3101-1CERTIFIED TO

CAN/CSA STD C22.2 NO. 1010.1

Fuse Holder

10

T R O U B L E S H O O T I N G G

Remove the fuses from the fuse holder. Using astandard ohmmeter, measure continuity between theends of each fuse. Replace defective fuses.

If the voltage setting and the fuses are correct, butno power or blank display continues, proceed asfollows:

4 Remove the rear housing. See Rear HousingRemoval in the Repair section for instructions.

5 Reinstall the power cord (cord not shown).

6 Measure the voltage between the bottom sides ofcomponents L7 and L8 on the CPU assemblyusing a standard voltmeter.

For 110V analyzers, the measured voltagemust be 90V to 125V

For 220V analyzers, the measured voltagemust be 210V to 240V

If no voltage, check the power cord and outlet. If themeasured voltage is incorrect, replace the CPUassembly. See CPU Assembly Removal / Installationin the Repair section for instructions.

DC Power Verification1 Remove the rear housing. See Rear Housing

Removal in the Repair section for instructions.

2 Remove Sensor Module.

3 Connect the power cord to an electrical outlet,then to the AC power cord socket.

4 Connect the reference side of the voltmeter to X8on the CPU board.

5 Verify the voltage at each test point listed in Table 1.

6 Connect the reference side of the voltmeter to X2on the CPU board.


8 Connect the reference side of the voltmeter to TP9on the pre-amp PC board.


No adjustments are permitted. Failed boardsshould be replaced. See CPU AssemblyRemoval / Installation in the Repair section forinstructions.

Test Point Voltage

Table 1

X1 + 5.00V + 0.15V

X4 + 24.00V + 5.00V

X5 + 19.00V + 4.00V

X6 - 19.00V + 4.00V

X7 + 5.00V + 0.25V

X8 GND Reference

X9 - 12.00V + 0.25V

X10 + 12.00V + 0.25V

Table 2

X2 GND Reference

X3 + 8.5V + 2.00V

Table 3

TP9 GND Reference

TP10 + 2.000V + .003V

TP12 - 12.00V + 0.25V

TP13 - 5.00V + 0.25V

TP14 + 5.00 + 0.25V

TP15 + 15.00V + 1.00V

11

T R O U B L E S H O O T I N G

Display Assembly VerificationFor blank display, or faulty keypad operation,proceed as follows:

1 Remove the power cord from the AC power cordsocket.


3 Disconnect and reinstall the display cable to theCPU P2 connector. See Display AssemblyRemoval / Installation in the Repair section forinstructions.

4 Reinstall the power cord. If the display nowfunctions, install the rear housing and resumenormal operation. See Rear Housing Installation inthe Repair section for instructions. If the display orkeypad remain faulty, proceed with step 5.

5 Remove the power cord from the AC power cordsocket. Connect a good test display assemblyto the CPU assembly. Reinstall the power cord.

If the test display functions properly, the originaldisplay is defective. Replace with a new displayassembly.

If the test display does not function, the CPU ismost likely defective. Install a new CPU assembly.See CPU Assembly Removal / Installation in theRepair section for instructions.

12


SENSOR STATUS

1 ELECTRODE mVs


3 TEMPERATURE

SECOND MENU

1 STANDBY2 REPLACE COMPONENTS3 DIAGNOSTICS4 STORED INFORMATION5 SETUP MENU6 ADJUST DISPLAY

DIAGNOSTICS

1 TEST COMPONENTS

2 TEST FLUIDICS

3 SENSOR STATUS

4 PRIME FLUIDS

Sensor Module HeatControl Verification

The EasyBloodGas analyzer contains a temperaturecontrol system that maintains the sensor moduletemperature at an acceptable range of 37.0 +0.2C. View the sensor temperature at any time byproceeding to the SSEECCOONNDD MMEENNUU and selectingDDIIAAGGNNOOSSTTIICCSS, SSEENNSSOORR SSTTAATTUUSS, thenTTEEMMPPEERRAATTUURREE. If the displayed temperature isoutside the acceptable range, follow the procedurebelow to identify the problem.

1 Touch the outside of the sensor module housing(white material) and confirm that it is slightlywarm to the touch. If it is warm, it is likely thatthe heating system is functioning correctly. If themodule does not feel warm, one part of theheating system (either in the sensor module orthe CPU) is malfunctioning.


3 Check the sensor module heater cable connectionat CPU position P5. Verify that the cable iscompletely inserted into the connector.

4 If the sensor module temperature remainsabnormal, install a test valve module. Turn poweron and wait 30 minutes.

5 Check the sensor module temperature again. Ifthe temperature is within specification, resumenormal operation (the first sensor module isdefective). If the temperature remains abnormal,it is likely that the CPU heating circuitry is faulty.Install a new CPU assembly. See CPU AssemblyRemoval / Installation in the Repair section forinstructions.

13


CONFIGURATION

1 CAL FREQUENCY 8HRS

2 AUTO STANDBY OFF

3 PRINTER ON

4 PO2/PCO2/BP mmHg

5 TEMPERATURE C

6 Hb g/dLCONFIRM?

SECOND MENU


SETUP MENU

1 USER OPTIONS

2 CONFIGURATION

3 SET REFERENCE LIMITS


5 DELETE DATA

SENSOR STATUS

1 ELECTRODE mVs


3 TEMPERATURE

SECOND MENU


DIAGNOSTICS

1 TEST COMPONENTS

2 TEST FLUIDICS

3 SENSOR STATUS

4 PRIME FLUIDS

Valve Module Heat ControlVerificationThe EasyBloodGas valve module contains a reagentpre-heater that maintains the valve temperature3641C. View the valve temperature byproceeding to the SSEECCOONNDD MMEENNUU and selectingDDIIAAGGNNOOSSTTIICCSS, SSEENNSSOORR SSTTAATTUUSS, thenTTEEMMPPEERRAATTUURREE. If the valve temperature is outsidethe acceptable range, proceed as follows:


2 Check the valve module cable connection at CPUposition P6. Verify that the cable is completelyinstalled into the connector.

3 If the valve temperature remains abnormal, installa test valve module. Turn power on and wait 15minutes.

4 Check the valve temperature again. If thetemperature is within specification, resumenormal operation (the first valve is defective).If the temperature remains abnormal, it is likelythat the CPU heating circuitry is faulty. Installa new CPU assembly. See CPU AssemblyRemoval / Installation in the Repair section forinstructions.

Printer VerificationIf the printer is not actively printing:

Verify that the printer paper is correctly installed.

1 Proceed to the SSEECCOONNDD MMEENNUU and selectSSEETTUUPP MMEENNUU, CCOONNFFIIGGUURRAATTIIOONN, thenPPRRIINNTTEERR. Confirm that the printer is ON. Ifthe printer is OFF, press 3 to turn it on.

2 Press 9 on the keypad. The printer head shouldmove across the paper. If the printer head moves,resume normal operation. If the printer headdoes not move, proceed to Step 3.

3 If the printer is still not working, remove thepower cord from the AC power cord socket, wait10 seconds, then reinstall the power cord. If theprinter is still not functioning, remove the powercord and the rear housing, then remove theprinter assembly. Inspect for paper jams orobstructions in the printer head area. See RearHousing Removal and Printer Assembly Removalin the Repair section for instructions.

14


TEST COMPONENTS

1 PUMP

2 VALVE

3 SAMPLER SWITCHES

4 DOOR SWITCH

5 REAGENT READER

DIAGNOSTICS

1 TEST COMPONENTS

2 TEST FLUIDICS

3 SENSOR STATUS

4 PRIME FLUIDS

SECOND MENU


SECOND MENU


DIAGNOSTICS

1 TEST COMPONENTS

2 TEST FLUIDICS

3 SENSOR STATUS

4 PRIME FLUIDS

TEST COMPONENTS

1 PUMP

2 VALVE

3 SAMPLER SWITCHES

4 DOOR SWITCH

5 REAGENT READER

4 Reinstall the printer assembly. See PrinterAssembly Installation in the Repair section forinstructions. Confirm that the printer cable iscompletely inserted into the P1 connector on theCPU. Reinstall the power cord. If the printer failsto print, install a known working test printerassembly in the analyzer.

If the test printer assembly works, install a new printerassembly in the analyzer.

If the test printer assembly fails, the CPU is defective.Install a new CPU assembly. See CPU AssemblyRemoval / Installation in the Repair section forinstructions.

Pump VerificationFor suspected pump problems, proceed to theSSEECCOONNDD MMEENNUU and select DDIIAAGGNNOOSSTTIICCSS,TTEESSTT CCOOMMPPOONNEENNTTSS, then PPUUMMPP. The screendisplays RROOTTAATTIINNGG.... Look for pump rotation.When full pump rotation occurs, FFUULLLLRROOTTAATTIIOONN? is displayed. Press YES and PPAASSSSis displayed.

When there is no pump movement or partial pumpmovement, press NO and FFAAIILL is displayed.Remove the pump tubing and repeat the PPUUMMPP test.If the test passes, install a new pump tubing andresume operation. If the test fails, install a new pumpassembly. See Pump Assembly Removal / Installationin the Repair section for instructions.

Valve VerificationFor suspected valve problems, proceed to theSSEECCOONNDD MMEENNUU and select DDIIAAGGNNOOSSTTIICCSS,TTEESSTT CCOOMMPPOONNEENNTTSS, then VVAALLVVEE. The screendisplays RROOTTAATTIINNGG..., then FFUULLLLRROOTTAATTIIOONN?. Look for rotation of the valve knoband press YES or NO. When full valve knob rotationoccurs, press YES and TTEESSTTIINNGG... is displayed.Internal testing verifies correct valve positioning for theCal A, Cal B, Rinse, Air and Home positions. PPAASSSSor FFAAIILL is displayed.

When there is no valve knob movement or partialvalve knob movement, press NO and FFAAIILL isdisplayed. Repeat the VVAALLVVEE test. If the test failsagain, install a new valve module. SeeEasyBloodGas Operators Manual for valvemodule replacement instructions.

15


Serial Interface Specifications

Connector 25-pin, D-sub male

Pin Type RS-232

Pin Assignments:

Pin 1 Chassis, Not connected

Pin 2 TxD

Pin 3 RxD

Pin 4 RTS

Pin 5 CTS

Pin 7 Signal Ground

Transmission Rate 2400 bits per second

Bit Configuration 8 data bits, 1 stop

Bit Parity None

Control Codes None

All lines end with carriage return line feed (CRLF)

All transmission is ASCII string

Electrode Signal Input VerificationEasyBloodGas electrodes that report out of rangevoltages may be defective and require replacement.Electrode troubleshooting is discussed in theEasyBloodGas Operators Manual. If the EasyBloodGasanalyzer reports repeated electrode voltage errors,follow this procedure.

1 Remove the EasyBloodGas electrodes from theelectrode module and check for any fluid leakagearound the electrodes and their pins. Examine thecontact housing connectors for any corrosion. All ofthese surfaces must be completely dry and salt free.Reinstall the electrodes and attempt recalibration. Ifthe voltage problems continue, it is likely that adefect exists in the amplifier section of the CPUassembly, or the contact housing is defective.


3 Remove the Pre-Amp PC Board. See Pre-amp PCBoard/Contact Housing Removal/Installation in theRepair section for instructions.

4 Install a new pre-amp PC board.

Serial Communication Verification1 Using an EasyBloodGas test serial cable, connect

the analyzer to a device with a known workingserial port.

2 Refer to the serial interface specifications on thispage.

3 When correctly linked, the data that is on theexternal device should match the data on theprintout.

See EasyBloodGas Operator's Manual for ComputerConnection setup.

16

R E P A I R R

Repair Overview

To replace EasyBloodGas assemblies, disassemble theanalyzer in the order described in this section, refer-ring to the photographs for assistance. After rearhousing removal, the printer assembly and displayassembly can be removed without removing the CPU.Access to all other assemblies requires removing theCPU board.

Before performing major repairs, print the followingsettings from the SSEECCOONNDD MMEENNUU by selectingSSTTOORREEDD IINNFFOORRMMAATTIIOONN, thenPPRRIINNTTOOUUTTSS.

UUSSEERR OOPPTTIIOONNSS, CCOONNFFIIGGUURRAATTIIOONN,PPRRIINNTTEERR OOPPTTIIOONNSS,,

PPAATTIIEENNTT LLIIMMIITTSS, QQCC LLIIMMIITTSS,PPAATTIIEENNTT IINNFFOORRMMAATTIIOONN

Quality control data will be lost if the CPU boardis changed.

Required ToolsOnly 4 tools are required to remove or install theEasyBloodGas electronic and mechanical assemblies:

Phillips screwdriver, #2 magnetic Phillips screwdriver, #1 Needle nose pliers Flash Device Removal Tool (provided with software

updates)

Before using the Flash Device Removal Tool, referto the instructions included in software update

packages.

4STORED INFORMATION

1 PATIENT RESULTS2 QC RESULTS3 REFERENCE LIMITS4 CALIBRATION DATA5 REAGENT MODULE6 PRINTOUTS

SECOND MENU

1 STANDBY


3 DIAGNOSTICS


5 SETUP MENU

6 ADJUST DISPLAY

17

R E P A I R

Rear Housing RemovalCut the printer paper to separate it from the analyzerand remove paper. Remove the 5 screws from the rearhousing.

Pull back the rear housing.

Rear Housing InstallationAlign the rear housing with the front housing. Verifythat all cables are enclosed inside the housings. Insertand tighten the 5 screws into the rear housing. Do notover tighten.

Reinstall the printer paper.

18

R E P A I R R

Printer Assembly RemovalDisconnect the P1 connector from the CPU assembly.

Slide the printer assembly out of the housing tracks.Avoid pinching the flex cable under the housing.

Printer Assembly InstallationSlide the printer assembly into the front housing cavity,using a thin, flat object (e.g., business card) to guidethe printer flex cable under the housing. Avoidpinching the cable.

Insert the printer cable into the P1 connector on theCPU as shown above.

19

R E P A I R

Display Assembly RemovalThe reagent module, sensor module, valve module,and printer assembly must be removed beforeremoving the display assembly.

Disconnect the P2 connector from the CPU assembly.

Remove the 4 screws that run alongthe top of the rear surface of the front housing.

After screw removal, grasp the display assembly asshown and gently lift up and away from the fronthousing, guiding the ribbon cable through the open-ing in the front housing.

Display Assembly InstallationInsert the display cable through the rectangularwindow in the front housing.

Align the display assembly insertion hooks with theopenings in the front housing. Push the assemblyagainst the front housing until it locks. Enclose the topaccess door post under the upper right corner of thedisplay housing.

Reinstall 4 screws along the top surface of the fronthousing. Insert the display cable through the openingand attach the display cable to the P2 connector onthe CPU assembly.

1919

20

R E P A I R R

CPU Assembly Removal

Note: Prior to removing the CPU board, you will needto print out information that will be lost.

Print out the following:

User Options Configuration QC Limits Patient Limits QC Results

Remove the printer assembly before removing CPUassembly. Disconnect cables at CPU positions P1, P2,P5, P7, P6 and P13.

Before replacing any CPU assemblies, contact themanufacturer to obtain a CPU replacement thathas been programmed with the analyzer serialnumber.

Remove the screw in the center of the CPU (P15),while supporting the transformer. Carefully slide theCPU assembly off the 4 corner mounting posts and thepre-amp PC board.

CPU Assembly InstallationCarefully line up the four corner mounting holes onthe CPU assembly with the mounting posts on the fronthousing. Gently push in the CPU assembly, making theconnection between the pre-amp PC board and CPUassembly.

Secure CPU assembly to front housing with mountingscrew at P15.

P5

P7 P6

P13

P1 P2

PrinterAssembly

21

R E P A I R

Flash Device RemovalRemove the flash device with the removal tool byprying each corner of the flash device until it can beremoved by hand.

Flash Device InstallationInstall the flash device into the U3 position with thechamfered edge in the lower right corner. Incorrectflash device orientation may damage the flash deviceand/or socket.

Before changing the flash device on the EasyBloodGas, follow these steps:

SECOND MENU Press STANDBY

MANUAL STANDBY 333

SERVICE MENU Press REPLACE FLASH

REPLACE FLASH? Press yes

CONFIRM? Press yes

POWER DOWN NOW Disconnect power

Note: Prior to removing the flash device, you willneed to print out information that will be lost.

Print out the following:

User Options Configuration QC Limits Patient Limits QC Results

Printer EPROM Removal andInstallationRemove the EPROM with the removal tool by pryingeach corner of the EPROM until it can be removed byhand. When installing, make sure that the chamferededge of the EPROM is oriented correctly in theEPROM socket.

22

R E P A I R R

After changing the flash device on the EasyBloodGas, power up and followthese steps:


MANUAL STANDBY 777

QC MENU Press CLEAR MEMORY

CONFIRM? Press yes

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R E P A I R

Access Door RemovalRemove the CPU assembly and loosen the top leftscrew and loosen or remove the display assemblybefore removing the access door.

Lift the right corner of the display assembly todisengage the access door post. Lift the door toremove the bottom post.

Access Door InstallationInsert the bottom door post into front housing base.Lift the right corner of the display assembly and insertthe access door post. Tighten the screw on the rear ofthe front housing.

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Pre-amp PC Board/ContactHousing RemovalRemove the screw which connects the grounding strapto the pre-amp PC board.

Remove the 6 screws from the pre-amp PC board.

Remove the pre-amp PC board with the contact hous-ing attached from the front housing. The contacthousing can be removed from the pre-amp PC boardby gripping both sides and pulling apart.

R E P A I R R

Before changing the Pre-amp PC board on the EasyBloodGas, follow these steps:


MANUAL STANDBY Press 333

SERVICE MENU Press REPLACE PREAMP

REPLACE PRE-AMP? Press yes

CONFIRM? Press yes

POWER DOWN NOW Disconnect power

25

R E P A I R

Pre-amp PC Board/ContactHousing InstallationAlign the opening on the pre-amp PC board with theCPU board mounting post. This will align the screwholes. Insert the 6 screws to secure. Do notovertighten. Connect the grounding strap to the pre-amp PC board.

After changing the Pre-amp PC board on the EasyBloodGas, power up and followthese steps:


MANUAL STANDBY 777

QC MENU Press CLEAR MEMORY

CONFIRM? Press yes

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R E P A I R R

Valve Cable RemovalRemove the retaining clips securing the valve cablewith needle nose pliers.

Caution: DO NOT damage the posts.

By squeezing the retaining clips with the pliers, theclips should lift off the posts.

Remove the valve cable from the front housing.

Valve Cable InstallationCaution: DO NOT damage the posts.

Insert the valve cable into the back side of the fronthousing so that the ribbon cable is positioned on theleft side of the connector.

Install 2 new retaining clips (top and bottom) on thecable posts to secure the connector. Push clips onusing needle nose pliers.

27

R E P A I R

Pump Assembly RemovalRemove the CPU assembly before removing the pumpassembly. Using a #1 Phillips, remove the 2 screwsand washers from the front side of the front housing.

Remove the screws which connect the grounding strapto the pre-amp PC board and the pump assembly.Place the grounding strap aside. Slide the pump as-sembly through the back side of the front housing.

Pump Assembly InstallationInsert the pump through the backside of the fronthousing. Align the pump bracket holes with the 2mounting posts on the front housing so that the pumpmotor cable is positioned below the pump assembly.

While holding the pump assembly in position, insertthe 2 screws with washers through the front side of thefront housing to secure the pump in position.

Attach the grounding shield to the pump assemblyand the pre-amp PC board.

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R E P A I R R

Sampler RemovalIf the sampler requires replacement, it can beremoved from the sensor module. Using a coin orfingers, remove the retaining screw from the sensormodule.

Also refer to package insert for sampler removaland installation updates.

Remove the screw mount (includes spring).

Rotate the sampler into the capillary position, then pullit out of the sensor module.

Sampler InstallationInstall the new sampler (includes sample probe andwiper) in the sensor module. Insert the sampleralignment pin into the sensor module. Rotate thesampler into the closed position.

Install the screw mount (includes spring) into thesampler. Replace the screw and tighten.

Do not overtighten the sampler screw.

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R E P A I R

In-field Reprogrammability/Software Updates

If software updates are required, follow theinstructions provided with the new software.

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N O T E S R

\EDIC@

0048

66-0

01 R

4

For Service or Technical Assistance call:800 777 5983 (In Continental US)781 275 4892 (International)

Medica Corporation 5 Oak Park Drive Bedford, MA 01730

ABG Service Manual - English 004866-901R4

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Transcript of ABG Service Manual - English 004866-901R4