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October 22, 1998 3:00 pm DRAFT+PageWriter 100, 200 and 300 Series Cardiographs M1770A, M1771A, and M1772A Mobile Cart M1705B Service Manual+33D

xCleaning the Electrodes and Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21Caring for the Battery . .

The Printer Door Assembly5-105The Printer Door Assembly This section describes how to remove and replace the printer door assembly. Figure 5-5 Removin

The Printer Drive Assembly5-11Replacing the Printer Door To replace the printer door, perform the above procedure in reverse order. Be sure to orient

The Printer Drive Assembly5-12Replacing the Printer Drive Assembly To replace the printer drive assembly: • If necessary, reinstall the gears. The gea

The Printhead Assembly5-135The Printhead Assembly This section describes how to remove and replace the printhead assembly. Removing the Printhead Asse

The Printhead Assembly5-148. Carefully slide the printhead assembly up and out of the printer well. Pull the two bundles of wires and the ground wire

The Printhead Assembly5-155. Push the lens through the mounting hole. 6. Finish removing the sensor by pulling the sensor through the mounting hole.

The Printhead Assembly5-16Figure 5-10 Replacing the Foam Block Figure 5-11 Positioning of the Printhead A. Printhead switch pin B. Printhead C. Leaf s

The Control Board Assembly5-175The Control Board Assembly This section describes how to remove and replace the control board assembly. This procedure

The Power Supply5-185The Power Supply This section explains how to remove and replace the power supply. Use an electrostatic wrist band or other appro

The Power Supply5-195. Separate the power supply from the lower case. 6. Disconnect connector J2 from the power supply by grasping all the wires of

xiIntegrated Front End Circuits/Oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12Calibration . . .

The Fuses5-205The Fuses To replace the AC fuses: 1. Unplug the cardiograph from AC power. 2. Turn the cardiograph bottom-side up. 3. Locate the tw

The Internal Cables5-215The Internal CablesCabling between the power supply board, the control board, the capacitor board, and the printhead has chang

The Internal Cables5-2211. Hold the cables in this position while sliding the power supply board into its guide slots in the lower case. Be careful n

The Storage and Transmission Board Assembly5-23Replacing the Printer CablesMore detailed instructions for replacing the printhead power cable and the

The Storage and Transmission Board Assembly5-244. When the storage and transmission board assembly has been pried out at least 0.25 inches, it should

6-1Parts Lists 5Introduction This chapter contains the parts lists for the cardiograph and cart. The numbers on each figure or exploded view refer to

Ordering Information6-25Ordering Information You can order any of the parts listed through your local Hewlett-Packard Sales/Service Office listed belo

Calling for Service6-35Calling for Service Here are the numbers you can use to call Hewlett-Packard Service for technical assistance.United States of

Parts List6-45Parts ListAll references to AHA mean that the color code conforms to recommendations of the American Heart Association. All references t

Parts List6-5Patient cables, power cords, batteries, and other accessories are not supplied with rebuilt units. ABZ Italian(Metr)M1770-68505M1770-6840

xiiThe Printhead Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-13Remo

Parts List6-6Figure 6-1 Patient Cable Exploded Diagram

Parts List6-71Includes 2 and 3.Table 6-2 Patient Cable Parts List Ref. No. Description Part No. 1 Patient cable, AHA1M2461APatient cable, IEC1M2462A

Parts List6-8Figure 6-2 Main Assembly Exploded Diagram

Parts List6-9The printer door assembly does not include the door label. To get the label, order the Case label set for the language needed. Table 6-3

Parts List6-10Figure 6-3 Bottom Case Exploded Diagram Figure 6-4 Storage and Transmission Board16

Parts List6-111When replacing capacitor assembly M1770-60162 or cable assembly M1770-61604, both parts must be replaced with capacitor assembly M1770-

Parts List6-12Figure 6-5 Bottom Case Exploded Diagram Figure 6-6 Storage and Transmission Board16

Parts List6-131When replacing capacitor assembly M1770-60162 or cable assembly M1770-61604, both parts must be replaced with capacitor assembly M1770-

Parts List6-14Figure 6-7 Bottom Case–External Exploded Diagram

Parts List6-15The battery door assembly does not include the door label. To get the label, order the case label set for the language needed. Table 6-8

1-1Introduction This chapter introduces you to the M1770A PageWriter 200i/300pi, M1771A PageWriter 200, and M1772A PageWriter 100 cardiographs and lis

Parts List6-16Figure 6-8 Upper Case Exploded Diagram

Parts List6-171M1770-61670 replaces M1770-61606Table 6-9 Upper Case Assembly Parts List Ref. No. Description Part No. 1 Gear plate and motor assembl

Parts List6-18Figure 6-9 M1770A/M1771A Keyboard Exploded Diagram

Parts List6-191Complete assembly of items 1-82Items 2a, 2b, and 3 are not individually replaceable. These parts require factory assembly. Refer to ite

Parts List6-20Figure 6-10 M1772A Keyboard Exploded Diagram

Parts List6-211Complete assembly of items 1-32Items 2a, 2b, and 3 are not individually replaceable. These part require factory assembly. Refer to item

Parts List6-22Figure 6-11 M1705B Cart Exploded Diagram.

Parts List6-23Table 6-12 M1705B Cart Parts List Ref. No. Description Part No. Cart assembly M1705-695001 Retainer cap (2 req’d) 0590-19772 Screw, tp

Parts List6-24

Parts List6-25

PageWriter 100, 200, 200i, and 300pi Series Cardiographs1-2Figure 1-1 M1770A/M1771A PageWriter 300pi/200i/200 Cardiograph.The PageWriter 100, 200, a

Parts List6-26

Parts List6-27

Parts List6-28

Parts List6-29

Parts List6-30

Parts List6-31

Parts List6-32

A-1Connector Pin AssignmentsThe tables in this appendix list the pin assignments for each connector on the CPU assembly and the power supply boards. F

CPU Assembly ConnectorsA-2The connector listed in this table is shared by the keyboard and the preview screen. Pins 1–11 serve the keyboard, while pin

CPU Assembly ConnectorsA-3Signal Definition+5KBD 5 volt supply for keyboard assembly. ACONLED AC on LED. Drives the AC indicator LED on the keyboard.

Inquiries1-3M1705B Cart The optional M1705B Cart provides mobility for the PageWriter 100, 200, and 300 family of cardiographs. The large wheels make

CPU Assembly ConnectorsA-4 Table A-2 M1770A/71A Keyboard Connector J102 to LCD Module Pin Signal Pin Signal 1 DF 9 DD22 Reserved 10 DD33ground11+5KB

CPU Assembly ConnectorsA-5Table A-3 Control Board J201 to M1772A Keyboard Connector J101 Pin Signal Pin Signal Pin Signal 1 ground 15 ROWSA_1 28 LED11

CPU Assembly ConnectorsA-6Signal Definition+5KBD 5 volt supply for keyboard assembly. ACONLED AC on LED. Drives the AC indicator LED on the keyboard.

CPU Assembly ConnectorsA-7 Table A-4 Control Board Connector J304 to Printhead Logic Pin Signal Pin Signal 1 DATA_OUT 8 nSTROBE32 FSW_+5V 9 nSTROBE4

CPU Assembly ConnectorsA-8Table A-5 Control Board Connector J303 to Paper Sensor Pin Signal Pin Signal 1 DOOR 4 GROUND2 GROUND 5 DETECTOR3 EMITTERSi

CPU Assembly ConnectorsA-9 Table A-7 Power Supply Connector J3 to Control Board Connector J301 Pin Signal Pin Signal 1 ENBL5V 8 PPWRON2 GROUND 9 GR

CPU Assembly ConnectorsA-10Table A-8 Power Supply Connector J2 to Control Board J302 Pin Signal Pin Signal 1 GROUND 9 +5V2 GROUND 10 +5V3 GROUND 11

CPU Assembly ConnectorsA-11Although AHA designations are used as signal names, IEC designations are more accurate descriptors. Table A-10 Control Boar

CPU Assembly ConnectorsA-12Table A-11 System Expansion Connector J12 Pin Row A Row B Row C Pin Row A Row B Row C 1 GROUND GROUND GROUND 17 A2

CPU Assembly ConnectorsA-13FEDATA Serial data from front end. FEPWR Front end transformer drive control. FSW_+5V Filtered switched 5 V. GPIO0-GPIO3 Ge

Specification Data1-41Meets or exceeds AAMI EC11-1991 standard for Diagnostic Electrocardiographic Devices.2Meets or exceeds AAMI EC11-1991 standard f

CPU Assembly ConnectorsA-14 Table A-12 Power Supply J1 to AC Input Cable Pin Signal 1L12 EARTH_GND3L2

IndexIndex - 1AA1, A-14A16, A-12ACfuse holders, 5-20ACON, 4-19ACON signal, A-10, A-12ACONLED signal, A-3, A-6AD1, A-12ALE signal, A-12Bbattery, 2-22pr

IndexIndex - 2optical paper sensor removal, 5-14optionspower cords, 1-9options, cardiograph, 1-8, 1-12country, 1-8ordering information, parts, 6-1PPag

IndexIndex - 3LED5, A-6LED6, A-6signalsA1, A-14A16, A-12ACON, A-10, A-12AD1, A-12ALE, A-12CLK2A, A-12CP, A-14D0, A-12DATA, A-8DATA_OUT, A-7DD0, A-4DET

IndexIndex - 4

Specification Data1-51Bold entries mean meets or exceeds AAMI EC11-1991 standard for Diagnostic Electrocardiographic Devices. Meets frequency response

Specification Data1-61Meets or exceeds AAMI EC11-1991 standard for Diagnostic Electrocardiographic Devices.2Meets or exceeds IEC 601-2-25 Internationa

Specification Data1-71Described in the European Committee for Standardization, Standard Communications Protocol - Computer - Assisted Electrocardiogra

Noticeii0Notice The information in this document is subject to change without notice. Hewlett-Packard makes no warranty of any kind with regard to thi

Options and Accessories1-81Options and Accessories PageWriter 100, 200, 200i, and 300pi Cardiographs These tables list the options and accessories ava

Options and Accessories1-91In Table 1-9 an “A” in the Printer column refers to 8.5 x 11-in. paper; “A4” refers to 210 x 297-mm paper2See Table 1-11 fo

Options and Accessories1-10Table 1-10 PageWriter 300pi, 200/200i and 100 Series Documentation Part Numbers Document Title Language Part NumberPageWri

Options and Accessories1-11PageWriter 300pi Predictive Instruments Quick Reference Guide (M1770A with Serial # Prefix CND)English M1770-92800French M1

Options and Accessories1-12Standard Accessories Accessories included are based on model number and localization. • 200 sheets of z-fold paper-English

2-1Performance Verification and Maintenance1Introduction This chapter describes how to verify the cardiograph’s performance, explains preventive maint

Performance Verification2-2Visual Inspection and Power On Self TestBefore beginning the inspection, press the key to put the cardiograph in Standby

Performance Verification2-3When the tests are completed, the results are also printed out in a pass/fail format on the left-hand side of the first pag

Performance Verification2-4Internal Circuitry Testing of PageWriter 200/200i/300pi These tests are performed on the internal circuitry: •Memory • Gate

Performance Verification2-5If your cardiograph is equipped with Options #A05 or #A10, do not turn it off during Test C or D. If you turn off the cardi

NoticeiiiLike all electronic devices, this cardiograph is susceptible to electrostatic discharge (ESD). Electrostatic discharge typically occurs when

Performance Verification2-6Table 2-5 ROM Replacement Part Numbers for PageWriter Cardiographs M1770, M1771A Serial NumberPrefix CNA, CNB, or CNC,3807A

Performance Verification2-7Table 2-7 ROM Replacement Part Numbers for PageWriter Cardiographs M1772A Serial NumberPrefix CNA, CNB, or CNC,3807A or ear

Performance Verification2-8Non-Volatile Random Access Memory (test 6) . Each 2-byte location of NVRAM is written and read with a pseudo-random pattern

Performance Verification2-9Flash Memory Tests (tests C and D) . The flash memory tests verify that the flash memory on the optional expansion board ca

Performance Verification2-10Figure 2-1 An Extended Self-Test Report Example A. Test Results B. Character Set C. Timing Tics D. Diagonal Lines E. Stepp

Performance Verification2-11How to Read the Extended Self-Test Report Each printed page of the extended self-test contains the following information:

Performance Verification2-12Display Test (PageWriter 200/200i/300pi only) The display test shows test patterns on the display. Each of the following p

Performance Verification2-13Keyboard Tests The keyboard tests are not automatically performed during the extended self-test. These must be manually pe

Performance Verification2-14ECG Simulation Taking an ECG using a 12-lead ECG simulator allows you to verify areas of operation that the extended self-

Performance Verification2-15Figure 2-2 12-Lead ECG from ECG Simulator (200/200i/300pi only).

NoticeivWarranty Hewlett-Packard warrants this medical product against defects in materials and workmanship for a period of three years in certain geo

Changing the Default Operating Language (200/200i/300pi Only)2-162Changing the Default Operating Language (200/200i/300pi Only) The default operating

Resetting the Cardiograph to the Factory Default State2-172Resetting the Cardiograph to the Factory Default State Resetting the cardiograph sets the A

Preventive Maintenance2-182Preventive Maintenance Routine maintenance of the cardiograph consists of cleaning and inspection. This should be done as n

Preventive Maintenance2-19Cleaning the Keyboard Overlay 1. Carefully insert a small flat-bladed screwdriver into the notches at the front edge of the

Preventive Maintenance2-20Cleaning the Digital Array Printhead and Paper Sensor If you use Hewlett-Packard recording paper, you should not have to cle

Preventive Maintenance2-212. Wipe the printhead with a foam swab dipped in 90% isopropyl alcohol. Scrub until all visible residue is removed. 3. Dry t

Caring for the Battery2-222Caring for the Battery The battery must be installed for proper operation of the cardiograph. Even if the cardiograph is pl

Caring for the Battery2-23Safety Tests The safety tests listed below are performed at the time of manufacture to assure compliance with these standard

PageWriter 100, 200/200i, and 300pi Series Performance Verification Matrix2-242PageWriter 100, 200/200i, and 300pi Series Performance Verification Mat

PageWriter 100, 200/200i, and 300pi Series Performance Verification Matrix2-25Extended Self Test Function Tests (F) Run Extended Self Test; verify:•RO

NoticevPrinting History October 1994 Edition 1May 1996 Edition 2October 1998 Edition 3

PageWriter 100, 200/200i, and 300pi Series Performance Verification Matrix2-26Printer Test (P)for M1772Verify:• straight diagonal lines• even spacing

PageWriter 100, 200/200i, and 300pi Series Performance Verification Matrix2-27System Safety (S)Use Safety AnalyzerCheck:Chassis-to-Ground ResistanceGr

PageWriter 100, 200/200i, and 300pi Series Performance Verification Matrix2-28

3-1Theory of OperationThis chapter contains an overview of the cardiograph operation, and circuit descriptions of the major subassemblies. Except as n

Circuit Descriptions3-2Power-off The power-off sequence is software controlled. The power-off sequence is initiated when the key is pressed, battery

The Patient Cable3-3Figure 3-1 Simplified System Block Diagram 3The Patient Cable The patient cable used in the PageWriter 100/200/200i/300pi family i

CPU Assembly3-43CPU Assembly This discussion of the CPU assembly covers the following circuits: •CPU • System Gate Array • Serial EEROM • System Memor

CPU Assembly3-5CPU/System Oscillator The CPU (Central Processing Unit) is the processing engine for the instrument. The microprocessor used is the Int

CPU Assembly3-6DMA for ECG Data The System Gate Array receives data from the ECG Front End in serial form. When 16 bits have been received, the System

CPU Assembly3-7NVRAM Interface The NVRAM contains 1K bits of non-volatile storage for the cardiograph configuration. Keyboard Interface The passive Ke

Safety Summaryvi0Safety Summary Safety Symbols Marked on the Cardiograph The following symbols are used on the cardiograph or the cart: Please see Cha

CPU Assembly3-8timing and the printer RAM, regulates motor speed, monitors printhead temperature, monitors the battery condition, and provides the int

Power Supply3-93Power Supply The Power Supply connects the instrument to the AC line to charge the battery and power the circuitry. It conditions and

Power Supply3-10Rectifier/Filter This circuitry rectifies and filters the AC voltage to produce a DC voltage for the rest of the power supply. Switch-

ECG Front End3-113ECG Front End The ECG Front End provides the interface between the system and the patient. It electrically isolates the patient to p

ECG Front End3-12Opto-Isolators Opto-Isolators pass the digital sample data from the patient-connected circuitry to the rest of the instrument, provid

Storage and Transmission (Option #A05 0nly)3-133Storage and Transmission (Option #A05 0nly)The Option #A05 PC assembly plugs into the cardiograph expa

Storage and Transmission (Option #A05 0nly)3-14Figure 3-6 Option #A05 PC Assembly Block Diagram M177XA Expansion ConnectorThe expansion connector on

Storage and Transmission (Option #A05 0nly)3-15Flash1, Flash2FLASH1 and FLASH2 are 1M x 16 bit flash ROMs. The gate array provides control and timing

Storage and Transmission (Option #A05 0nly)3-16

4-1Troubleshooting3Introduction This chapter provides information for localizing cardiograph problems to the subassembly level. This information is de

Conventions Used in This Manualvii0Conventions Used in This Manual Warning statements describe conditions or actions that can result in personal injur

Test Tools4-23Test ToolsTwo troubleshooting tools are provided with each instrument:• patient cable test tool (M1770-87908)• front end and transmissio

The Error and Event Logging4-33The Error and Event Logging The last error that was displayed can be printed by starting the Extended Self-test. The er

Troubleshooting Tables4-4PageWriter 100 Error Message Communication The PageWriter 100 communicates the following error messages with these correspond

Troubleshooting Tables4-5Before removing or inserting any board or connector, make sure AC power is off and the battery is removed. The error codes li

Troubleshooting Tables4-62Table 4-2 Power Supply and Battery Symptom Possible Cause Corrective Action AC indicator not lit. Power cord unplugged.AC

Troubleshooting Tables4-7Low Battery light or Low Battery message remains on during extended self-test.Low battery or defective battery.Battery fuse i

Troubleshooting Tables4-8Remember that most noise results from poor patient-electrode connections or poor quality electrodes. If noise persists after

Troubleshooting Tables4-9You can use the patient cable test tool and the ECG front end test tool to determine whether a problem is caused by a poor pa

Troubleshooting Tables4-10Message: Printer door open or the current LED is flash-ing.Door is ajar.A printer cable is not fully seated.Printhead cont

Troubleshooting Tables4-11Printed data are garbled. A printer cable is not fully seated.Defective printhead.Defective component in data path.Reseat co

Prefaceviii0PrefaceThis manual contains service information for the Hewlett-Packard M1770A pageWriter 300pi, PageWriter 200i, M1771A PageWriter 200, a

Troubleshooting Tables4-12Table 4-7 Storage (Option #A05 0nly)Message Possible Cause Possible SolutionsECG too noisy to store(This message appears bri

Troubleshooting Tables4-13Table 4-8 Transmission (Option #A05 only)Message Possible Cause Possible SolutionsTelephone busy, waiting to redial Busy tel

Troubleshooting Tables4-14No modem at remote site The local modem could not complete the connection. The most likely causes are:1. Telephone cable dis

Troubleshooting Tables4-15In addition to the error codes listed above, the following event codes are displayed on the extended self-test report for ca

Troubleshooting Tables4-165160, sub codes 10 and 11Check cable. (This message appears when the trans-mission type is Direct or Direct SCP)Check modem

Troubleshooting Tables4-179030-9035, 9042-9045, 9050, 9051, 9069-9085 Direct transmission protocol error. Retry transmission.9038 A non-specific error

Troubleshooting Tables4-18Table 4-10 Recorder ProblemsProblem Corrective ActionIs the cardiograph turned on? The LCD screen should be on. Use the shif

Testing the Power Supply4-194Testing the Power Supply Use this procedure to check the voltages produced by the power supply. The cardiograph must be c

Testing the Power Supply4-208. Turn the cardiograph On by pressing . 9. Measure SW+5V between ground and the point marked SW+5V. It should read +5

Testing the Power Supply4-21Figure 4-2 Voltage Test Locations

ixContentsNotice. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Testing the Power Supply4-22

5-1Removal and Replacement4Introduction This chapter contains procedures for removing and replacing these cardiograph subassemblies: • battery • key

The Battery5-2The directions in this chapter generally assume you are facing the front of the cardiograph as you work. Thus, for example, the “left si

The Battery5-3Figure 5-1 Removing the Battery Door.A Battery door

The Keyboard Assembly5-45The Keyboard Assembly This section explains how to remove and replace the keyboard assembly. The keyboard procedures apply to

The Keyboard Assembly5-5Figure 5-2 Removing the Keyboard Overlay A. Overlay notches 5. Using two screwdrivers, place the blade of one screwdriver on

The Keyboard Assembly5-66. Carefully lift the assembly and tilt it until the keyboard and control board are accessi-ble. 7. Disconnect the keyboard

The Keyboard Assembly5-7Replacing the Keyboard To replace the keyboard, perform the following steps: 1. Connect the green wire to the spade connector

The Top Cover Assembly5-85The Top Cover Assembly This section describes how to remove and replace the top cover assembly. The top cover assembly inclu

The Top Cover Assembly5-9The capacitors on the connection assembly next to the control board store hazardous amounts of energy during AC and battery o