GE Medical Systems PRN 50, PRN 50-M Service Manual

PRN 50-M (M-Port)

and PRN 50 (AutoPort)

Digital Writer

Service Manual

2006503-001 Revision A

T-2 PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer Revision A

2006503-001 23 March 2001

127(

Due to continuing product innovation, specifications in this manual are subject to change without notice.

Trademarks

Listed below are GE Medical Systems Information Technologies trademarks. All other trademarks contained
herein are the property of their respective owners.

900 SC, ACCUSKETCH, AccuVision, APEX, AQUA-KNOT, ARCHIVIST, Autoseq, BABY MAC, C Qwik
Connect, CardioServ, CardioSmart, CardioSys, CardioWindow, CASE, CD TELEMETRY, CENTRA, CHART
GUARD, CINE 35, CORO, COROLAN, COROMETRICS, Corometrics Sensor Tip, CRG PLUS, DASH,
Digistore, Digital DATAQ, E for M, EAGLE, Event-Link, FMS 101B, FMS 111, HELLIGE, IMAGE STORE,
INTELLIMOTION, IQA, LASER SXP, MAC, MAC-LAB, MACTRODE, MANAGED USE, MARQUETTE,
MARQUETTE MAC, MARQUETTE MEDICAL SYSTEMS, MARQUETTE UNITY NETWORK, MARS,
MAX, MEDITEL, MEI, MEI in the circle logo, MEMOPORT, MEMOPORT C, MINISTORE, MINN OWS,
Monarch 8000, MULTI-LINK, MULTISCRIPTOR, MUSE, MUSE CV, Neo-Trak, NEUROSCRIPT,
OnlineABG, OXYMONITOR, Pres-R-Cuff, PRESSURE-SCRIBE, QMI, QS, Quantitative Medicine,
Quantitative Sentinel, RAC RAMS, RSVP, SAM, SEER, SILVERTRACE, SOLAR, SOLARVIEW, Spectra
400, Spectra-Overview, Spectra-Tel, ST GUARD, TRAM, TRAM-NET, TRAM-RAC, TRAMSCOPE, TRIM
KNOB, Trimline, UNION STATION, UNITY logo, UNITY NETWORK, Vari-X, Vari-X Cardiomatic,
VariCath, VARIDEX, VAS, and Vision Care Filter are trademarks of GE Medical Systems Information
Technologies registered in the United States Patent and Trademark Office.

12SL, 15SL, Access, AccuSpeak, ADVANTAGE, BAM, BODYTRODE, Cardiomatic, CardioSpeak, CD
TELEMETRY

®

-LAN, CENTRALSCOPE, Corolation, EDIC, EK-Pro, Event-Link Cirrus, Event-Link
Cumulus, Event-Link Nimbus, HI-RES, ICMMS, IMAGE VAULT, IMPACT.wf, INTER-LEAD, IQA,
LIFEWATCH, Managed Use, MARQUETT E PRISM, MARQUETT E

®

RESPONDER, MENTOR, MicroSmart,

MMS, MRT, MUSE CardioWindow, NST PRO, NAUTILUS, O

2

SENSOR, Octanet, OMRS, PHi-Res,
Premium, Prism, QUIK CONNECT V, QUICK CONNECT, QT Guard, SMART-PAC, SMARTLOOK, Spiral
Lok, Sweetheart, UNITY, Universal, Waterfall, and Walkmom are trademarks of GE Medical Systems
Information Technologies.

© GE Medical Systems Information Technologies, 2001. All rights reserved.

Revision A PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer i

2006503-001

Contents

1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Manual Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3

Purpose of Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3

Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Responsibility of the Manufacturer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4

Intended Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4

Equipment Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5

Warnings, Cautions, and Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5

Service Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

Service Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6

Equipment Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 -6

Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6

2 Equipment Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Description of Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

PRN 50-M and PRN 50 Digital Writers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3

Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-4

Interconnection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-4

Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-8

Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

Certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-10

Classifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-10

3 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Troubleshooting the Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3

Controlling Electrostatic Discharge Damage . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4

Thermal Writer Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-6

Power Supply Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-9

Interface PCB Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-11

ii PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer Revision A

2006503-001

4 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Maintenance Schedule . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3

Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3

General Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-4

Cleaning the Print Head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-5

Performance Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-6

System Performance Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 -9

Completion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-10

Electrical Safety Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-11

Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-11

Wall Receptacle Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-12

Ground (Earth) Integrity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-12

Ground (Earth) Wire Leakage Current Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-14

Enclosure Leakage Current Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-15

Test Completion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-16

5 Upper Level Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

Upper Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 -3

Parts List 418331-001B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4

Exploded View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5

Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6

Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7

Packaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8

Revision A PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer iii

2006503-001

6 Interface PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3

Theory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-3

Power Supply Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-5

Input / Output Signal Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-5

Parts List 801390-002A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7

Parts Location Diagram 801390-002A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8

Schematic Diagram SD801390-002A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-9

Parts List 801390-001A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-12

Parts Location Diagram 801390-001A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-13

Schematic Diagram SD801390-001A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-14

iv PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer Revision A

2006503-001

Revision A PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer 1-1

2006503-001

1 Introduction

1-2 PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer Revision A

2006503-001

For your notes

Revision A PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer 1-3

2006503-001

Introduction: Manual Information

Manual Information

Revision History

Each page of this manual has a revision letter located at the bottom of
the page. It identifies the revision level of the entire manual. This may be
important if you have more than one manual and you wish to know
which is the most current.

For the initial release, all pages have the revision letter A. For the
second update, all pages receive the revision letter B. The latest letter of
the alphabet added to the table below corresponds to the most current
revision.

Purpose of Manual

This Service Manual covers the use of both:

n

The PRN 50 writer with the M-Port interface (PRN 50-M) and

n

The PRN 50 writer with the AutoPort interface (PRN 50).

This manual provides technical information for service representatives
and technical personnel involved in configuring and maintaining the
PRN 50-M and the PRN 50 Digital Writers.

Table 1. Revision History

Revision Date Comment

A 3/23/2001 Initial Release

1-4 PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer Revision A

2006503-001

Introduction: Safety Information

Safety Information

Responsibility of the Manufacturer

GE Medical Systems Information Technologies is responsible for the
effects of safety, reliability, and performance only if:

n

assembly operations, extensions, readjustments, modifications, or
repairs are carried out by persons authorized by GE Medical Systems
Information Technologies;

n

the electrical installation of the relevant room complies with the
requirements of the appropriate regulations; and

n

the device is used in accordance with the instructions for use.

Intended Use

Follow the directives stated below when using the PRN 50-M Digital
Writer.

n

This device is intended for use under the direct supervision of a
licensed health care practitioner.

n

This device is not intended for home use.

n

Federal law restricts this device to be sold by or on the order of a
physician.

n

Contact GE Medical Systems Information Technologies for
information before connecting any device to the equipment that is
not recommended in this manual.

n

Parts and accessories used must meet the requirements of the
applicable IEC 601 series safety standards, and /or the syst em
configuration must meet the requirements of the IEC 60601-1-1
medical electrical systems standard.

n

Periodically, and whenever the integrity of the device is in doubt, test
all functions.

n

The use of ACCESSORY equipment not complying with the
equivalent safety requirements of this equipment may lead to a
reduced level of safety of the resulting system. Consideration
relating to the choice shall include:

u

use of the accessory in the PATIENT VICINITY; and

u

evidence that the safety certification of the ACCESSORY has
been performed in accordance to the appropriate IEC 60601-1
and/or IEC 60601-1-1 harmonized national standard.

n

If the installation of the equipment, in the USA, will use 240V rather
than 120V, the source must be a center-tapped, 240V, single-phase
circuit.

Revision A PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer 1-5

2006503-001

Introduction: Safety Information

Equipment Symbols

The following symbols appear on the transmitter.

Warnings, Cautions, and Notes

Warnings and Cautions are used throughout this manual to designate a
degree or level of hazardous situations. Haz ard is defined as a source of
potential injury to a person.

:$51,1*

A warning indicates a potential hazard or unsafe practice
which, if not avoided, could result in death or serious
injury.

&$87,21

A caution indicates a potential hazard or unsafe practice
which, if not avoided, could result in minor personal
injury or product/property damage.

127(

A note provides app licat ion tips or other us eful information to a ssure
that you get the most from your equipment.

ATTENTION: Consult accompanying documents before using the
equipment.

Equipotentiality

Alternating current (AC)

Power switch; I = ON; O = OFF.

Fuse

Revision A PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer 2-1

2006503-001

2 Equipment Overview

2-2 PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer Revision A

2006503-001

For your notes

Revision A PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer 2-3

2006503-001

Equipment Overview: Description of Equipment

Description of Equipment

PRN 50-M and PRN 50 Digital Writers

The PRN 50-M and PRN 50 Digital Writers thermally record patient
data on a paper strip. You can graph any parameter or trace you monitor
on a Solar 7000/8000/8000M monitor, Eagle 4000 monitor, Centralscope,
or CIC system on the the writer. Graphs are initiated automatically
when an alarm activates, or you can manually initiate a graph from a
monitor.

The writer provides a high-re solution recording of patient waveform
data, including alphanumeric text relating to the waveform data. A
microprocessor-driven thermal print head translates digitized data
directly into graphic forms on the strip chart. Up to four real-time
waveforms from the monitor scree n may be graphed simulta neously. The
writer also generates printouts of stored information, including trended
parameters, arrhythmia information, and cardiac calculations,
pulmonary calculations, and dose calculations.

The paper drive motor is the only moving part on the PRN 50-M. This

motor operates at eight different speeds—0.1, 0.5, 1, 5, 10, 12.5, 25, and
50 mm/s.

PRN 50-M and PRN 50 Digital Writer

g

2-4 PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer Revision A

2006503-001

Equipment Overview: Description of Equipment

Controls

A 32:(5 indicator illuminates when power is applied and a 3$3(5
287 indicator illuminates when you need to add paper or the paper

carriage door is open. If you press the *5$3+6723 switch while
graphing, the writer stops immediately. If you hold the switch down for
more than 10 seconds, an alphanumeric test strip prints out.

Front Panel Controls

Interconnection

M-Port/AutoPort Compatibility

1. An M-Port Host/Device must be connected to an M-port Device/Host.

2. If an AutoPort Host/Device is to be connected to an M-Port Device/
Host, the AutoPort Host/Device must be adapted to an M-Port pin
out by using the AutoPort to M-Port Adapter.

127(

Whether a host or device implement s an M-Port or an AutoPort
interface can be determined by:

1. M-Port Host/Device products have any or all of the following:
a. Have the word ‘M-Port’ or ‘M#’ e.g., ‘M1’, ‘M2’, ‘M3’; for

the connector name on the label above the RJ-45.

b. Have the text for the name of the RJ-45 connector in a

yellow field.

c. Have a product name that ends in an ‘M’, e.g., Solar

8000M, PRN 50-M, Respiratory Mechanics-M.

2. AutoPort Host/Device products do not have any of the above.

g

32:(5 Indicator

3 $3(5287

Indicator

*5$3+6 723Button

Revision A PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer 2-5

2006503-001

Equipment Overview: Description of Equipment

Device Connections

Below are figures of device connections using the Octanet connectivity
device and using the Tra m-net Interfa ce Adapter. Refer to “Connection of

a PRN 50-M/PRN 50 to a:” on page 2-7 for connection instructions.

8000M M-Ports

RM-M Module Connected to Patient Monitor via Octanet Connectivity

Device with M-Port to AutoPort Adapter

CIC to PRN 50-M

M-Port connectors

(basic software package)

M-Port connector

(cardiac package)

M-Port connector

on RM-M

COM2 Serial Port
(DB9M Serial Port)

2-6 PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer Revision A

2006503-001

Equipment Overview: Description of Equipment

Solar 8000 to PRN 50-M ASYNC Port

127(

The RJ-45 connector protocol is specified on the label below the RJ­45 Connector (i.e, 03RUW or $XWR3RUW).

Back Panel

RMT ALMTRAM-NET

ETHERNET

RMT VID

RS-232

ASYNC COMM

Table 2. Host to PRN 50-M/PRN 50 Connections.

Hosting Device PRN 50-M/PRN 50 Interconnection Between Host and Writer

Monitor/Octanet/

Central Station

Connector

Used

Type

Connector

Used

Protocol

(Note #1)

Adapter

Cable Used

Needed? Part # Where Placed

Solar 8000M RJ-45

M1.. M4
(M-Ports)

PRN 50-M RJ-45 M-Port No 418335-00x
PRN 50 RJ-45 AutoPort Yes 2001973-001 PRN 50 418335-00x

Octanet RJ-45

(AutoPorts)

PRN 50-M RJ-45 M-Port Yes 2001973-001 Octanet 418335-00x
PRN 50 RJ-45 AutoPort No 418335-00x

CIC DB9M Serial

Port

PRN 50-M RJ-45 M-Port Yes 2006550-001 CIC 418335-00x
PRN 50 RJ-45 AutoPort No 422843-00x

Eagle 3000
Eagle 4000
Solar 7000
Solar 8000
Tramscope
Centralscope

DB9F Async Either

PRN 50-M
or PRN 50

DB9M Async No 700179-00x

Power Switch

AC Power Cable
Connector

Async Comm

Serial Number

Power Cable
Clamp

M-Port or AutoPort

Revision A PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer 2-7

2006503-001

Equipment Overview: Description of Equipment

Table 3. Adapter/Cable References for Table 4

Cable or Adapter Part Number

AutoPort to M-Port Adapter GEMS-IT #2001973-001
RJ-45 Cable GEMS-IT #418335-00x
CIC(DB9F) to PRN 50-M (RJ-45) Adapter GEMS-IT #2006550-001
Female DB9 TO Male RJ45 Cable GEMS-IT #422843-00x
Scope DB9M/DB9F Cable GEMS-IT #700179-00x

Table 4. Connection of a PRN 50-M/PRN 50 to a:

Monitor/Host: Instructions:

Solar 8000M:

With the PRN 50-M writer (which has the M-Port
interface):

1. Connect one end of an RJ-45 cable into the RJ-45

connector on the PRN 50-M labeled ‘M-Port’.

2. Connect the other end of the cable into any available M­Port RJ-45 connectors on the front of the Solar 8000M
labeled ‘M1,’ ‘M2,’ ‘M3,’ or ‘M4.’

3. Make sure that all components have power on.

4. Make selections desired using the Graph menu options.

With the PRN 50 writer (which has the AutoPort interface): 1.Place an AutoPort to M-Port Adapter into the RJ-45

connector on the PRN 50 labeled ‘AutoPort’.

2. Connect one end of an RJ-45 cable into the RJ-45
connector in the AutoPort to M-Port Adapter which was
inserted into the PRN 50 connector labeled ‘AutoPort’ in
step #1.

3. Connect the other end of the cable into any available
RJ-45 connectors, M-Ports on the front of the Solar
8000M labeled ‘M1’, ‘M2’, ‘M3’ or ‘M4’.

4. Make sure that all components have power on.

5. Make selections desired using the Graph menu options.

Octanet Connectivity Device:

With the PRN 50-M writer (which has the M-Port
interface):

1. Place an AutoPort to M-Port Adapter into one of the RJ­45 connectors (AutoPorts) on the front of the Octanet.
Connectivity Device.

2. Connect one end of an RJ-45 cable into the RJ-45
connector on the PRN 50-M labeled ‘M-Port’.

3. Connect the other end of the RJ-45 cable into the
AutoPort to M-Port Adapter inserted into the Octanet
Connectivity Device RJ-45 in Step #1

4. Make sure that all components have power on.

5. Make selections desired using the Graph menu options.

With the PRN 50 writer (which has the AutoPort interface): 1. Connect one end of the RJ-45 cable into the RJ-45

connector in the PRN 50 connector labeled ‘AutoPort’.

2. Connect the other end of the RJ-45 cable into any
available RJ-45 connectors (AutoPorts) on the front of
the Octanet Connectivity Device.

3. Make sure that all components have power on.

4. Make selections desired using the Graph menu options.

2-8 PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer Revision A

2006503-001

Equipment Overview: Description of Equipment

CIC:

With the PRN 50-M writer (which has the M-Port
interface):

1. Place an CIC(DB9F) to PRN 50-M (RJ-45) Adapter on
the DB9M serial port connector of the CIC.

2. Connect one end of an RJ-45 cable into the RJ-45

connector on the PRN 50-M labeled ‘M-Port’.

3. Connect the other end of the RJ-45 cable into the RJ-45
connector in the adapter attached to the CIC in Step #1

4. Make sure that all components have power on.

5. Make selections desired using the Graph menu options.

With the PRN 50 writer (which has the AutoPort interface): 1.Connect the RJ-45 end of the FEMALE DB9 TO MALE

RJ45 cable into the RJ-45 connector in the PRN 50
connector labeled ‘AutoPort’.

2. Connect the other end of the FEMALE DB9 TO MALE
RJ45 cable to the DB9M serial port connector of the
CIC.

3. Make sure that all components have power on.

4. Make selections desired using the Graph menu options.

Eagle 3000, Eagle 4000, Solar 7000, Solar 8000, Tramscope, Centralscope:

With the PRN 50-M (which has the M-Port interface) or
the PRN 50 writer (which has the AutoPort interface):

1. Connect the DB9F end of the Scope DB9M/DB9F cable
into the DB9M connector in the PRN 50-M/PRN 50
connector labeled ‘Async Comm’.

2. Connect the other end of the Scope DB9M/DB9F cable
to the DB9F ‘Async Comm’ serial port connector of the
Eagle 3000, Eagle 4000, Solar 7000, Solar 8000,
Tramscope or Centralscope.

3. Make sure that all components have power on.

4. Make selections desired using the Graph menu options.

Table 4. Connection of a PRN 50-M/PRN 50 to a:

Monitor/Host: Instructions:

Revision A PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer 2-9

2006503-001

Equipment Overview: Description of Equipment

Mounting

You must use the PRN 50-M or PRN 50 with an opt ional pedestal base
(shown below) or with an optional mounting bracket. See the GE Medical
Systems Information Technologies Monitoring Systems Mounting
Reference Guide (pn 403799-010) for detailed information.

&$87,21

Do NOT operate the device without an approved mount
attached. The operational temperature of this device is
maintained by air flow though the bottom vent holes.

PRN 50-M or PRN 50 with Pedestal

2-10 PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer Revision A

2006503-001

Equipment Overview: Technical Specifications

Technical Specifi ca ti ons

Table 5. Performance Specifications

Display Indicators (LEDs) Power, Paper Out

System Interface May be used with any Solar monitor, Eagle monitor, or Tram display.

Number of Waveform Channels Four maximum

Recorder Information Automatic graphing from alarm or alarm stacking, manual graphing from monitor or central station

display.

Writing Method Thermal, fixed head, dot array.

Writing Resolution 200 dots/inch vertical, 480 dots/inch horizontal at 25 mm/s.

Paper Width 50 mm (1.97 in)
Paper Length 30.5 m (100 ft.)
Paper Speed 0.1, 0.5, 1, 5, 10, 12.5, 25, 50 mm/s (±2%)

Waveform Frequency Response Limited only by acquisition system.

Grid Printed as needed.

Table 6. Environmental Specifications

Power Requirements 110 ±20 VAC, 50/60 Hz, single phase 220 ± 40 VAC, 50/60 Hz, single phase

Power Consumption 50 W maximum

Cooling Convection

Heat Dissipation 170 Btu/hr

Operating Ambient temperature: 0° C to 50° C (32° F to 122° F)

Relative humidity: 5% to 95% (noncondensing).

Storage Ambient temperature: –40° C to 70° C (–40° F to 158° F)

Relative humidity: 5% to 95% (noncondensing).

Table 7. Physical Specifications

Height 20.4 cm (8 in)

Width 11.6 cm (4.6 in)
Depth 9.3 cm (3.7 in)

Net Weight 2.6 kg (5.7 lb) with base 1.2 kg (2.7 lb) without base

Mounting Free-standing when used with optional pedestal base. Optional wall mount also available.

Revision A PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer 2-11

2006503-001

Equipment Overview: Technical Specifications

Certification

Safety standards

UL Classified for 2601-1
UL Classified for CAN/CSA C22.2 No. 601.1
IEC 60601-1 Certified
CE Marking for the 93/42/EEC Medical Device Directive

Classifications

Equipment components are classified, according to IEC-60601-1, as:

Underwriters Laboratories, Inc.

Classified by Underwriters Laboratories Inc. with respect
to electric shock, fire, mechanical and other specified
hazards, only in accordance with UL 2601-1, CAN/CSA
C22.2 No. 601.1, IEC 60601-1, and, if required, IEC 60601­2-27, IEC 60601-2-30, IEC 60601-2-34, IEC 60601-1-1.

Table 8. Product Classifications

Type of protection against

electrical shock

Degree of protection against

electrical shock

Degree of protection against

harmful ingress of water

Degree of safety of application

in the presence of a f lammable

anesthetic mixture with air or

with oxygen or nitrous oxide

Method(s) of sterilization or

disinfection recommended by

the manufacturer

Mode of operation

PRN 50-M I Not Marked Ordinary Not Suitable NA Continuous
PRN 50 I Not Marked Ordinary Not Suitable NA Continuous

Key: I: Class I equipment

B: Type B equipment

BF: Type BF equipment

CF: Type CF equipment

NA: Not applicable

Ordinary: Ordinary equipment (enclosed equipment without

protection against ingress of water)

Not Suitable: Equipment not suitable for use in the presence of a
flammable anesthetic mixture with air or with oxygen or nitrous
oxide

2-12 PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer Revision A

2006503-001

Equipment Overview: Technical Specifications

For your notes

Revision A PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer 3-1

2006503-001

3 Troubleshooting

3-2 PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer Revision A

2006503-001

For your notes

Revision A PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer 3-3

2006503-001

Troubleshooting: General

General

Troubleshooting the Components

This section contains information that may be useful when you
troubleshoot the PRN 50-M and PRN 50 Digital Writers.

Visual Inspe ction

This visual inspection procedure looks for obvious problems in the

equipment. Simple failures–disconnected cables, foreign debris on a
printed circuit board, or even missing hardware–can seriously affect the
operation.

These simple failures can appear to be completely different problems to
the user, or repair technician, making the troubleshooting process very
difficult.

The following steps might seem trivial but we highly recommended that
you perform them to remove these “simple” failures as causes of
problems in the equipment.

n

Never turn off host equipment by pul lin g the power cord out of the
wall receptacle. Always use the power switch to apply/remove power.
Always verify that the power switch is in the 2)) positio n be f ore
removing the power cord from the wall receptacle. Set the power
switch to the 2)) position and disconnect the equipment from its
power source.

n

Check all power and interface cables to make sure they are firmly
connected. There should be n o ex cess ive t ens io n on any o f t he cab les
nor should an y of them be showing any signs of excessive wear.

n

Check rear connector of the module for foreign debris or crushed
connections.

n

Check the power cord on the host equipment. Verify that the line,
neutral and ground wires are all connected firmly to the plug and
that they are not shorted together. See wall receptacle check found in
Electrical Safety Tests of the appropriate patient monitor service
manual.

3-4 PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer Revision A

2006503-001

Troubleshooting: General

Controlling Electrostatic Discharge Damage

All external connector inputs and outputs of the device are designed with
protection from ESD damage. However, if the device requires service,
exposed components and assemblies contained within are susceptible to
ESD damage. This includes human hands, non-ESD protected work
stations and/or improperly grounded test equipment.

The following guidelines will help make a service workstation more
resistant to the ESD damage:

n

Discharge any static charge you may have built up before handling
semiconductors or assemblies containing semiconductors.

n

A grounded, antistatic wristband (3M part number 2046 or
equivalent) or heel strap should be worn at all times while handling
or repairing assemblies containing semiconductors .

n

Use properly grounded soldering and test equipment.

n

Use a static-free work surface (3M part number 8210 or equivalent)
while handling or working on assemblies containing semiconductors.

n

Do not remove semiconductors or assemblies containing
semiconductors from antistatic containers (Velo-stat bags) until
absolutely necessary .

n

Make sure power to an assembly is turned off before removing or
inserting a semiconductor.

n

Do not slide semiconductors or electrical/electronic assemblies across
any surface.

n

Do not touch semiconductor leads unless absolutely necessary.

n

Semiconductors and electrical/electronic assemblies should be stored
only in antistatic bags or boxes.

These guidelines may not guaranty a 100% static-free workstation, but
will greatly reduce the potential for failure of any electrical/electronic
assemblies.

Revision A PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer 3-5

2006503-001

Troubleshooting: General

Fuse Replacement

The fuse drawer on the PRN 50-M contains two metric fus es
(pn 409801-003). Follow these steps to replace the fuses.

1. Place the power switch on the power-entry module in the 2))
position.

2. Remove the power cord from the mains power source and the power­entry module.

3. Use a small screwdriver to release the power-entry module door and
loosen the fuse holder block from the power-entry modul e.

4. Remove the fuse holder block, repl ace the defective fuse(s) and
reassemble.

I

O

3-6 PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer Revision A

2006503-001

Troubleshooting: General

Thermal Writer Replacement Procedure

This procedure details the removal and replacement of the thermal
writer assembly in the PRN 50-M and PRN 50.

127(

To control static-discharge damage, be sure to discharge any static
charge you may have built up before starting this procedure. Wear a
grounded, antistatic strap and use grounded test equipment.

This procedure should be performed in the order listed.

1. Turn the 212)) switch at back to 2)) position. Always use the
212)) switch to apply power. Remove power cord from unit.

2. Disconnect the PRN 50-M or PR N 50 from the patient monitor and
communication network, if applicable.

Disassembly

To remove the thermal writer assembly, refer to “Writer Replacement

Illustrations” on page 3-8 and do the following.

1. Open the writer door and loca te t he two Phillip s screws in side, at the
back of the paper roll compartment.

2. Fully loosen the two captive screws and separate the two halves of
the PRN 50-M or PRN 50 assembly. (The two screws remain in the
assembly.)

&$87,216

To avoid doing possible damage to the thermal print
head, access the screws through the two slots in the
paper carriage door.

Always hold the writer and bezel together to avoid
putting strain on the flex cable and front panel
membrane.

3. Lift up on the flex cable connector latch and disconnect the flex cable
from the back of the writer.

4. Pull the writer straight forward from the front bezel.

5. Return removed 2-inch thermal writer to GE Medical Systems
Information Technologies.

Revision A PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer 3-7

2006503-001

Troubleshooting: General

Reassembly

To replace the thermal wr iter assembly, refer to “Writer Replacement

Illustrations” on page 3-8 and do the following.

1. Slide the new thermal writer straight into the front bezel.

2. Feed the flex cable through the opening in the PCB and press the
release latch on the flex connector to lock the cable in place.

3. Slightly tug on the flex cable to confirm that the connector has
latched.

4. Carefully slide the two halves of the PRN 50-M or PRN 50 back
together, open the paper carriage door and tighten the two screws.

&$87,21

Do NOT overtighten the screws. Overtightening the
screws could cause damage to the PRN 50-M or PRN 50.

3-8 PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer Revision A

2006503-001

Troubleshooting: General

Writer Replacement Illustrations

Loosen the Screws

Correct

Incorrect

Separate the Assembly

Inside Front Bezel

Unlock the Flex Cable

Remove the Flex Cable

Lock the Flex Cable

Remove & Replace the

Writer

Reattch the Flex Cable

Revision A PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer 3-9

2006503-001

Troubleshooting: General

5. Thread the mounting screw completely through the ESD shield as
shown below before sliding the two halves of the PRN 50-M or PRN
50 back together.

6. Carefully slide the two halves of the PRN 50-M or PRN 50 back
together, open the paper carriage door and tighten the two mounting
screws

Completion

1. Reattach the power cord to the unit.

2. To verify the operation of the PRN 50-M or PRN 50, complete the

“System Performance Test” on page 4-9.

3. Because the thermal writer was replaced, perform the “Ground

(Earth) Wire Leakage Current Tests” on page 4-14 and the
“Enclosure Leakage Current Test” on page 4-15.

Power Supply Replacement Procedure

This procedure details the removal and replacement of the power supply
assembly in the PRN 50-M and PRN 50.

&$87,21

To control static-discharge damage, be sure to discharge
any static charge you may have built up before starting
procedure. Wear a grounded, antistatic strap and use
grounded test equipment.

This procedure should be performed in the order listed.

1. Turn the ON/OFF (,2) switch OFF (2). Always use the ON/OFF
(,2) switch to apply power. Remove the power cord from the unit.

2. Disconnect the PRN 50-M or PR N 50 from the patient monitor and
communication network, if applicable.

ESD Shield View

Correct

Incorrect

3-10 PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer Revision A

2006503-001

Troubleshooting: General

Disassembly

To gain access to the power supply assembly, refer to the illustrations on
the previous page and do the following:

1. Open the writer door and loca te t he two Phillip s screws in side, at the
back of the paper roll compartment.

2. Fully loosen the two captive screws, separate the two halves of the
PRN 50-M or PRN 50 assembly, and carefully set the writer and
front bezel assembly aside. (The two screws are retained in the
assembly.)

&$87,216

To avoid doing possible damage to the thermal print
head, access the screws through the two slots in the
paper carriage door.

Always hold the writer and bezel together to avoid
putting strain on the flex cable and front panel
membrane.

3. Disconnect the cables at - and - on the power supply.

4. Remove the four mounting screws a n d remove power supply.

5. Install the new power supply and reverse the above procedure to
reassemble the writer.

127(

The power sup ply is auto sensing and requires no adjustments.

6. Return removed power supply to GE Medical Systems Information
Technologies Service.

Completion

1. Replace power cord to unit.

2. To verify the operation of the PRN 50-M or PRN 50, complete the

“System Performance Test” on page 4-9.

3. Because the thermal writer was replaced, perform the “Ground

(Earth) Wire Leakage Current Tests” on page 4-14 and the
“Enclosure Leakage Current Test” on page 4-15.

J2

J1

Power Supply

Revision A PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer 3-11

2006503-001

Troubleshooting: General

Interface PCB Replacement Procedure

This procedure d etails the removal a nd replacement of the Interface PCB
assembly in the PRN 50-M and PRN 50.

&$87,21

To control static-discharge damage, be sure to discharge
any static charge you may have built up before starting
procedure. Wear a grounded, antistatic strap and use
grounded test equipment.

Perform this procedure in the order listed.

1. Turn the ON/OFF (,2) switch at back OFF (2). Always use the ON/
OFF switch to apply power. Remove the power cord from unit.

2. Disconnect the PRN 50-M or PR N 50 from the patient monitor and
communication network, if applicable.

Disassembly

To gain access to the power supply assembly, refer to the illustrations on
the previous page and do the following.

1. Open the writer door and locate the two Phillips screws inside, at
back of paper roll compartment.

2. Fully loosen the two captive screws, separate the two halves of the
PRN 50 assembly and carefully set the writer and front bezel
assembly aside. (The two screws are retained in the assembly.)

&$87,216

To avoid doing possible damage to the thermal print
head, access the screws through the two slots in the
paper carriage door.

Always hold the writer and bezel together to avoid
putting strain on the flex cable and front panel
membrane.

3. Disconnect the cable at - on the Interface PCB.

4. Remove the three mounting screws and remove the Interface PCB.

5. Remove the two jackscrews from the$V\QF&RPP connector on
the back of the assembly.

6. Install the new Interface PCB and reverse the above procedure to
reassemble the writer.

127(

The Interface PCB requires no adjustments.

7. Return the removed Interface PCB to Information Technologies.

J1

Interface PCB

3-12 PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer Revision A

2006503-001

Troubleshooting: General

Completion

1. Replace power cord to unit.

2. To verify the operation of the PRN 50-M or PRN 50, complete the

“System Performance Test” on page 4-9.

3. Because the thermal writer was replaced, perform the “Ground

(Earth) Wire Leakage Current Tests” on page 4-14 and the
“Enclosure Leakage Current Test” on page 4-15.

Revision A PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer 4-1

2006503-001

4 Maintenance

4-2 PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer Revision A

2006503-001

Maintenance:

For your notes

Revision A PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer 4-3

2006503-001

Maintenance: Maintenance Schedule

Maintenance Schedule

General

An effective maintenance schedule should be established for the PRN 50­M and PRN 50 Digital Writers. The schedule should include inspection,
general cleaning, performance testing, and safety testing on a regular
basis.

It is recommended that you perform the inspection, general cleaning , and
cleaning of the print head every three months. It is recommended that
you perform safety tests every twelve months or if any internal
components have been altered.

For the purpose of record keeping, a “Preventive Maintenance
Inspection” form is provided at the end of this chapter for duplication.

:$51,1*

A failure, on the part of the responsible individual
hospital or institution employing the uses of this
monitoring equipment, to implement a satisfactory
maintenance schedule may cause undue equipment
failure and possible health hazards.

Inspection

Inspect the PRN 50-M or PRN 50 on a regular basis. Follow these
guideline when you inspect the equipment.

n

Inspect the equipment for obvio u s physical damage and replace
damaged items.

n

Inspect all connectors for bent pins or prongs. Replace or repair any
bad cables or connectors. Note that replacement of connectors should
be performed only by qualified service personnel.

n

Inspect all cable insulation. Qualified service personnel should repair
or replace damaged or deteriorated cables.

n

Inspect fuses.

n

Inspect seating of socketed components and circuit boards.

4-4 PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer Revision A

2006503-001

Maintenance: Maintenance Schedule

General Cleaning

Exterior Cleaning

Clean the PRN 50-M or PRN 50 on a regular basis.
You may clean the exterior surfaces of the writer with a dampened lint-

free cloth. Use one of the following approved solutions:

n

ammonia (diluted),

n

Cidex,

n

sodium hypochlorite bleach (diluted), or

n

mild soap (diluted).

To avoid damage to the equipment, follow these rules.

&$87,21

Failure to follow these rules may melt, distort, or dull the
finish of the case, blur lettering on the labels, or cause
equipment failures.

Always dilute the solutions according to the manufacturer’s suggestions.
Always wipe off all the cleaning solutions with a dry cloth after cleaning.
Never use wax containing a cleaning substance.
Never pour water or any cleani ng solution on the equipment or permit

fluids to run behind switches, into the conn ectors, or into any v entilation
openings in the equipment.

Never use these cleaning agents:

n

abrasive cleaners or solvents of any kind,

n

acetone,

n

alcohol based cleaning agents (except for cleaning the thermal print
head), or

n

Betadine.

Interior Cleaning

On a regular basis, qualified service personnel should open the writer
and blow dust from the unit with compressed air.

Revision A PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer 4-5

2006503-001

Maintenance: Maintenance Schedule

Cleaning the Print Head

This procedure explains how to clean the thermal print head. From
heavy usage, debris accumulates on the thermal print head and distorts
the printed image. It is recommended that you perform this procedure
when necessary, depending on usage.

Materials Required

A nonabrasive material/cloth and isopropyl alcohol are all that are
necessary to perform this procedure.

Procedure

Perform this procedure in the order listed.

1. Turn the ,2switch at the back of the unit to the 2 (off) position and
disconnect the power cord from the mains source.

2. Open the writer door to expose the print head.

3. Remove paper roll.

4. Locate the print head (shown in the figure at the left). A flashlight
may help illuminate the print head for closer examination.

5. Wipe the print head with alcohol and a nonabrasive material/cotton
swab in a side to side motion. Continue wiping until the cloth/swab
wipes clean.

6. Wipe paper drive roller clean of any bits of paper and debris with
alcohol and a nonabrasive material.

Completion

Perform the “System Performance Test” on page 4-9 to verify PRN 50-M

and PRN 50 operation.

Printhead

Paper Driv e Roller

4-6 PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer Revision A

2006503-001

Maintenance: Maintenance Schedule

Performance Test

This chapter contains a procedure for testing the performance of the PRN
50-M and the PRN 50 Digital Writers. Some familiarity with the PRN
50-M and the PRN 50 Digital Writers is required for this procedure.

Frequency

Perform this procedure every three months or whenever a circuit board
or other assembly is repaired or replaced.

Requirements

Connect the PRN 50-M or PRN 50 to a patient monitoring system to
complete the following steps.

127(

Before plugging the PRN 50-M or PRN 50 power cord into a power
receptacle, verify that the ,2 power switch is OFF (2). Always use
the power switch on the back to apply power.

1. Turn the PRN 50-M or PRN 50 power switch on the back panel ON
(,). The DC motor should not “jerk” the paper and nothing should

print on the paper.

2. Verify the 32:(5 indicator (green LED) on the front panel
illuminates.

3. Observe the 3$3(5287 indicator (yellow LED) on the front panel
does not illuminate.

If there is paper in the paper compartment, the LED should
illuminate briefly at start-up and then extinguish.

If there is no paper in the paper compartment, load paper i n the
thermal writer. Press the *5$3+ 6723 button to aid in loading the
paper.

4. Press and hold the *5$3+6723 button for at least 10 seconds.
The writer should pri nt out the revision of operating software
currently installed on the processo r PCB with the alphanumeric test
pattern shown below.

Verify that the alphanumerics print clearly and are uniform in size
and contrast. If the printing is not uniform, clean the printhead and
try again. If the printer still fails, call GE Medical Systems
Information Technologies for service.

Revision A PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer 4-7

2006503-001

Maintenance: Maintenance Schedule

Print Quality

After the alphanumerics print, continue to hold the *5$3+6723
button until the first test pattern is visible, then release. A series of three
test patterns follow to allow you to check the print quality.

To stop the test pattern at any time cycle the powe r by turning the p ower
switch off and then back on. Pressing the *5$3+6723 button while
the test pattern is running only changes the paper speed.

First Test Pattern

The first test pattern i s used to check the roller for flat spots and other
irregularities. With this test the pattern you should see a uniform gray
background with no light spots or gaps. Check the roller f or dirt or
damage if this test fails.

Text

At the start of each test pattern are printed seven lines of text. Verify
that all text and patterns are satisfactory as follows:

First and second lines – The first two lines consist of a GE Medical

Systems Information Technologies’ part number, software revision,

and date for the Boot and Main software.

Third line – Printed on the third line is the measured printhead

voltage.

Forth line – The forth line shows the measured printhead temperature

in degrees centigrade. This temperature varies between 20 and 50
degrees and depends on the ambient temperature and what is
printing.

Fifth line – The fifth line is the printhead resistance range. The exact

printhead resistance range of your writer is printed on a label affixed
to the printhead which you can view by opening the paper carriage
door as shown in the drawing at the left. The resistance value
printed on this label should be within the range printed on the fifth
line.

Sixth line – Printed on the sixth line is the speed the test patterns are

printing.

Seventh line – Printed on the sevent h line is the duty cycle of percent of

time the drive motor is on.

Printhead
Resistance
Label

4-8 PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer Revision A

2006503-001

Maintenance: Maintenance Schedule

Second Test Pattern

The second test pattern is used for checking printhead alignment, speed
accuracy, and speed regulation.

Printhead alignment – The two end most elements on the printhead

are turned on to form continuous lines on the edges of the paper.
These lines should always be visible. A light or missing line is an
indication of possible misalignment.

Speed accuracy – The grid pattern is printed to show speed control

accuracy. A marker at 75mm intervals along the bottom of the strip
is used for checking accuracy. To verify accuracy, place a 300mm
ruler on the first 75mm marker. The fifth 75mm marker should be at

300mm ± 6mm

Speed regulation – The triangular pattern is used to quickly check

speed regulation. The lines forming the triangle should be straight.

Any “bumps” in the lines would be an indication of a speed control
problem.

Third Test Pattern

This test pattern is not shown a n d used for production tests only.

Revision A PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer 4-9

2006503-001

Maintenance: System Performance Test

System Performance Test

Procedure

This part of the system performance testing is done with the PRN 50-M
or PRN 50 connected to a patient monitoring system. Do the following
steps in the order given.

Setup

1. Connect a simulator to the patient monitor. Simulate a patient’s
ECG on the display. Refer to the appropriate user manual.

2. Depress any graph button and verify that the PRN 50-M or PRN 50
is printing the same information displayed on the CRT monitor.

Test Speeds and Header Information

1. Change the speed of the graph on the monitor through all eight
speeds. Verify that the PRN 50-M or PRN 50 operates at the speed
indicated on the monitor. Graph a complete header of one ECG
waveform for the 25, 50, and 12.5 mm/s speeds.

2. Examine the header verifying that the printed information is correct
and legible.

Test PAPER OUT Indicator

You need a short length of paper for this part of the test.

1. Open the paper compartment.

2. Check that there is no debris blocking the paper sensor.

3. Turn the roller counterclockwise until approximately 12 inches of
paper are available.

4. Tear paper near the roller, releasing a 12-inch strip from the full roll.

5. Wrap the 12-inch strip back around the full paper roll.

6. Feed 4 inches out of the paper compartment and close the door.

7. Press the graph button on the monitor until the 12 inches of paper
runs out. Three things should happen:

u

The PRN 50-M or PRN 50 should stop printing before the last of
the paper leaves the door slot.

u

The 3$3(5287 (yellow LED) should illuminate.

u

When a graph is attempted at the monitor, a NO PAPER
message should display on the monitor CRT.

8. Reload the full paper roll and feed 4 inches out of the paper
compartment and close the door.

Sensor

4-10 PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer Revision A

2006503-001

Maintenance: System Performance Test

Test System Communications

Press any graph key on the monitor. The output should be similar to that
shown below. Verify that the grid is present and that the patient data
and other information including the date are legible.

Fault Mode

If the printer stops graphing and the green Power LED starts flashing:

n

the motor may have stalled,

n

the printhead may have overheated, or

n

the printhead voltage is out of specifica tion.

The green 3RZHU LED then continues to flash until the next graph,

when it reverts to a “steady on” state.

Completion

If the above conditions have been met, the PRN 50-M or PRN 50 is
performing properly.

Revision A PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer 4-11

2006503-001

Maintenance: Electrical Safety Tests

Electrical Safety Tests

General

Electrical safety tests provide a method of determining if potential
electrical health hazards to the operator of the device exist.

Recommendations

To help you establish a systematic maintenance routine, GE Medical
Systems Information Technologies recommends that you perform all
safety tests presented in this chapter:

n

upon receipt of the device,

n

every twelve months thereafter,

n

each time the main enclosure is disassembled or a circuit board is
removed, tested, repaired, or replaced, and

n

record the date and results on the “Maintenance/Repair Log”
included at the end of this chapter.

&$87,21

Failure to implement a satisfactory maintenance
schedule may cause undue equipment failure and
possible health hazards. Unless you have an Equipment
Maintenance Contract, GE Medical Systems Information
Technologies does not in any manner assume the
responsibility for performing the recommended
maintenance procedures. The sole responsibility rests
with the individual or institution using the equipment.
GE Medical Systems Informa tion Technolog ies perso nnel
may, at their discretion, follow the procedures provided
in this manual as a guide during visits to the equipment
site.

Test Conditions

Electrical safety tests may be performed under normal ambient
conditions of temperature, humidity, and pressure.

4-12 PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer Revision A

2006503-001

Maintenance: Electrical Safety Tests

Test Equipment

The manufacturer recommended test equipment required to perform
electrical safety tests is listed below. Equivalent equipment may be
substituted as necessary.

Wall Receptacle Test

Before starting the tests, the wall receptacle from which the device will
get electrical power must be checked. This test checks the condition of
the wall receptacle to ensure correct results from leakage tests.

For international wall receptacles, refer to the internal standards
agencies of that particular country. Use a digital multimeter to ensure
the wall receptacle is wired properly.

If other than normal polarity and ground is indicated, corrective action
must be taken before proceeding. The results of the following tests will be
meaningless unless a properly wired wall receptacle is used.

Ground (Earth) Integrity

Listed below are two methods for checking the ground (earth) integrity,

“Ground Continuity Test” and “Impedance of Protective Earth
Connection.” These te sts determine whether the device’s exposed metal
and power inlet’s earth (ground) connection has a power ground fault
condition.

Perform the test method below that is required by your Country/Local
governing safety organization.

Ground Continuity Test

Completion of this test is checked by the following steps:

1. Disconnect the DUT (device under test) from the wall receptacle.

2. Connect the negative(- ) le a d of th e ohm met er t o th e protect ive e arth
terminal (ground pin in power in-let connector) or the protective
earth pin in the MAINS PLUG (ground pin in power cord). Refer to
the US 120Vac power cord figure on the left.

3. Set the Ohm meter to the milliohm (mΩ) range.

Table 1. Required Tools/Special Equipment

Item Part Number

Leakage Current Tester

120 V (or equivalent)
240 V (or equivalent)

MT-1216-01
MT-1216-02

Multimeter –

Ground

Pin

Revision A PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer 4-13

2006503-001

Maintenance: Electrical Safety Tests

4. Connect the positive (+) lead of the Ohm meter to all exposed metal
surfaces on the DUT. If the metal surfaces are anodized or painted
scrape off a small area in a inconspicuous area for the probe to make
contact with the metal.

5. Resistance should read to pass:

u

0.1 ohm or less without power cord

u

0.2 ohms or less with power cord

Impedance of Protective Earth Connection

This test unlike a ground continuity test will also stress the ground
system by using special ground bond testers i.e. Kikusui (model 872 or

TOS 6100) or Associated Research model HYAMP® Jr. Model 3030D.
This test normally is only required as a manufacturing production test to

receive safety agency compliance (i.e. IEC601-1).
Some country agency’s do require this test after field equipment repairs

(i.e. Germany's DIN VDE 0751 standards).
Consult your country/local safety agency if in question.
Compliance is checked by the following steps:

1. A current not less than 10A and not exceeding 25 A from a current
source with a frequency of 50 or 60 Hz with a no-load voltage not
exceeding 6 V is passed for at least 5 s through the PROTECTIVE
EARTH TERMINAL or the protective earth pin in the MAINS PLUG
and each ACCESSIBLE METAL PART which could become LIVE in
case of failure in BASIC INSULATION.

2. The voltage drop between th e parts described is measured and the
impedance determined from the cur rent and volt age drop. It shal l not
exceed the values indicated.

For EQUIPMENT without a POWER SUPPLY CORD the impedance
between the PROTECTIVE EARTH TERMINAL and any ACCESSIBLE
METAL PART which is PROTECTIVELY EARTHED shall not exceed

0.1 ohms

For EQUIPMENT with a POWER SUPPLY CORD the impedance
between the protective earth pin in the MAINS PLUG and any
ACCESSIBLE METAL PART which is PROTECTIVELY EARTHED
shall not exceed 0.2 ohms.

When taking this measurement move the custo mer’s po wer cord ar ound ,
no fluctuations in resistance should be observed.

4-14 PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer Revision A

2006503-001

Maintenance: Electrical Safety Tests

Ground (Earth) Wire Leakage Current Tests

Perform this test to measure current leakage thro ugh the g round (earth)
wire of the equipment during normal operation.

1. Set the leakage tester switches as follows:

u

Selector knob - 1,

u

GND switch - OPEN,

u

Polarity switch - NORM,

u

Power switch - OFF.

2. Connect the DMM to the MET ER jac ks on the l eakag e test er. Set the
DMM to measure AC millivolts.

3. Connect the power cord of the device under test to the power
receptacle on the rear of the leakage tester.

127(

The device under test is to be tested at its normal operating
voltage.

4. Set the leakage tester power switch to ON.

5. Set the power switch of the device under test to ON.

6. Read the current leakage indicated on DMM. If the reading is greater
than the appropriate specification below, the device under test fails
and should be repaired and tested again.

u

300 µA (0.3 volts on the DMM), and the device under test is
powered from 100-120 V/50-60 Hz

u

300 µA (0.3 volts on the DMM), and the device under test is
powered from a centered-tapped 200-240 V/50-60 Hz, single
phase circuit

u

500 µA (0.5 volts on the DMM), and the device under test is
powered from a non-center-tapped, 200-240 V/50-60 Hz, single­phase circuit

127(

Center-tapped and non-center-tap ped circuits produce different
leakage currents and the UL and IEC limits are different.

7. Set the polarity switch on the leakage tester to RVS (reverse).

Revision A PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer 4-15

2006503-001

Maintenance: Electrical Safety Tests

8. Read the current leakage indicated on DMM. If the reading is greater
than the appropriate specification below, the device under test fails
and should be repaired and tested again.

u

300 µA (0.3 volts on the DMM), and the device under test is
powered from 100-120 V/50-60 Hz

u

300 µA (0.3 volts on the DMM), and the device under test is
powered from a centered-tapped 200-240 V/50-60 Hz, single
phase circuit

u

500 µA (0.5 volts on the DMM), and the device under test is
powered from a non-center-tapped, 200-240 V/50-60 Hz, single­phase circuit

127(

Center-tapped and non-center-tap ped circuits produce different
leakage currents and the UL and IEC limits are different.

9. Set the leakage tester power switch to OFF.

127(

The MD (measuring device) is the circuitry defined by the
appropriate standard for measuring leakage current.

The measuring devices, defined by various standard
organizations (IEC, UL, etc.), produce almost identical test
measurement results.

Enclosure Leakage Current Test

Perform this test to measure cu rrent leakage through expose d conductive
surfaces on the device under test during normal operation.

1. Set the leakage tester switches as follows:

u

Selector knob - 2,

u

GND switch - OPEN,

u

Polarity switch - NORM.

2. Connect a meter lead betw een the CHAS conne ctor on t he rear of the
leakage tester and an unpainted, non-anodized chassis ground on the
unit under test.

3. Set the leakage tester power switch to ON.

4-16 PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer Revision A

2006503-001

Maintenance: Electrical Safety Tests

4. Read the current leakage indicated on DMM. If the reading is greater
than the appropriate specification below, the device under test fails
and should be repaired and tested again.

u

300 µA (0.3 volts on the DMM), and the device under test is
powered from 100-120 V/50-60 Hz

u

300 µA (0.3 volts on the DMM), and the device under test is
powered from a centered-tapped 200-240 V/50-60 Hz, single
phase circuit

u

500 µA (0.5 volts on the DMM), and the device under test is
powered from a non-center-tapped, 200-240 V/50-60 Hz, single­phase circuit

127(

Center-tapped and non-center-tap ped circuits produce different
leakage currents and the UL and IEC limits are different.

5. Set the polarity switch to RVS and observe the same meter readings
as in the previous step.

6. Set the GND switch on the leakage tester to CLOSED.

7. Read the current leakage indicated on DMM. If the reading is greater
than the appropriate specification below, and the device under test is
powered from 100-240 V/50-60 Hz, the device under test fails and
should be repaired and tested again.

u

100 microamperes (0.1 volts on the DMM), and the device under
test is powered from 100-240 V/50-60 Hz

8. Set the polarity switch to RVS and observe the same meter readings
as in the previous step.

9. Set the leakage tester power switch to OFF and remove the meter
lead connected in step 2.

Test Completion

Disconnect all test equipment from the device. Disconnect the device
power cord plug from the leakage tester power receptacle. Disconnect the
leakage tester from the wall receptacle.

Revision A PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer 5-1

2006503-001

5 Upper Level Assembly

5-2 PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer Revision A

2006503-001

Upper Level Assembly:

For your notes

Revision A PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer 5-3

2006503-001

Upper Level Assembly: General

General

Upper Level

This section provides identification and ordering information for the
upper level assembly replacement parts of the PRN 50-M and PRN 50
Digital Writers.

Circuit board, parts placement, and schematic diagrams are found in the
next section of this manual.

&$87,21

This assembly is extremely static sensitive and should be
handled using the precautions described in “Controlling

Electrostatic Discharge Damage” on page 3-4 of this

manual.

5-4 PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer Revision A

2006503-001

Upper Level Assembly: Parts List 418331-001B

Parts List 418331-001B

Table 1. Upper Level Parts List

Item Description Part Number Qty.

1 Fuse, 800 MA, Time Lag, 5x20MM 409801-003 2
2 Plug, MC, Equipotential 400040-001 1
3 Washer, Lock, Serrated, F/M6 400041-001 1
4 Screw, M4-.7x10, Sems 411061-001 1
5 Nut, Hex Kep, M3-.5, Class 8 Zp 411323-001 2
6 Washer, Lock, M3, Ext, Tooth 412048-001 1
7 Jackscrew, 4-40 x .18, W/Vibratite 412302-001 2

8 Screw, PH, M3 x 6MM 45209-306 7
10 Clamp, Cable 415363-001 1
11 Housing, PRN50 417828-001 1
12 Membrane, Front Panel, PRN50, A1 417921-001 1
13 Bezel, Qube, Non-Shielded 417980-003 1
14 Pwr Sply, 15V, 40W, Open Frame, A4 418966-001 1
18 Harness, PS/PWR, Mdl, Rac, 2A:W2 419573-001 1
19 Harness, PS/Main, PCB, Rac, 2A:W3 419574-001 1
20 Choke Assy, 6.5 LG, W1 419575-002 1
21 Thermal Printer, 50MM, CS2, A2 419743-002 1
22 AC Inlet Module Conn/SW/Dual, FZ, SW1 420205-001 1
23 PCB PRN 50-M (M-Port) Interface

(See “Parts List 801390-002A” on page6-7)

801390-002 1

PCB PRN 50 (AutoPort) Interface

(See “Parts List 801390-001A” on page6-12)

801390-001 1

24 Packaging, Carton, Cube 411516-002 0
25 Packaging, Foam, Cube 421208-001 0
26 Carton, Accessory, Reverse Tuck 421208-002 0
27 Lable, Blank, 2.6 IN x .4 IN 404525-006 1
28 Paper Sample, 9402-046, 24/Case 4919-001 1
29 MNL SVCE PRN 50-M English 2006503-001 A/R

Revision A PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer 5-5

2006503-001

Upper Level Assembly: Exploded View

Exploded View

SEE NOTE 3

12X

22

9

21

15

12

16

13

23

7X 8

14

2X 5

11

2

3

4

10

27

17

2X 7

6

PRINTER AND BEZEL

FUSE HOLDER

SEE NOTE 4

1 REF

NOTES:

1. PLACE LOCKWASHER, ITEM 6, ON STUD (NEXT TO GROUND

SYMBOL) AND ATTACH CHOKE ASSEMBLY, ITEM 20, TO

HOUSING AS SHOWN. SECURE IN PLACE WITH TWO KEPS

NUTS, ITEM 5. ATTACH OTHER END OF ASSEMBLY TO THE

GROUND TERMINAL OF THE AC INLET MODULE, ITEM 22.

2. CENTER LABEL, ITEM 17, AS SHOWN BELOW THE CONNECTORS

ON BACK OF HOUSING. PLACE SERIAL LABEL, ITEM 27, WITHIN

THE OUTLINE ON THE CONNECTOR LABEL AS SHOWN.

3. INSERT FRONT PANEL, ITEM 12, INTO RECESS IN BEZEL, I

TEM 13. ALIGN LABEL, ITEM 15, AND APPLY TO TOP OF FRONT

PANEL. DO NOT APPLY PRESSURE TO THE RAISED LED

WINDOW AREAS.

4. INSERT PRINTER, ITEM 21, INTO BEZEL, ITEM 13, AND FEED THE

FLEX FROM THE FRONT PANEL, ITEM 12, THROUGH OPENNING

IN PCB AND ATTACH TO CONNECTOR AS SHOWN. SLIGHTLY

TUG ON FLEX TO CONFIRM THAT THE CONNECTOR LATCH IS

FUNCTIONING. PLACE BEZEL ASSEMBLY INTO HOUSING AND

OPEN PRINTER DOOR TO ACCESS THE TWO MOUNTING

SCREWS INSIDE. AVOID MAKING CONTACT WITH PRINT HEAD

WHEN TIGHTENING SCREWS.

5. OPEN DOOR ON INLET MODULE AND REMOVE FUSE HOLDER.

FUSES MUST BE INSERTED ON EACH SIDE AS SHOWN

(LOCATED IN BOTTOM OF HOLDER).

6. CENTER LABEL, ITEM 9, LEFT TO RIGHT ON TOP OF HOUSING

AND POSITION APPROXIMATELY 2.0 MM FROM THE EDGE.

BACK VIEW

SEE NOTE 2

27 REF

17 REF

FRONT VIEW LESS

BEZEL AND PRINTER

SEE

NOTE 1

20

SEE NOTE 6

SEE NOTE 5

22

FRONT PANEL

FLEX CABLE

CAPTIVE MOUNTING

SCREWS

*

*On some units, this islabeled

"AutoPort" and has an AutoPortconnection

5-6 PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer Revision A

2006503-001

Upper Level Assembly: Block Diagram

Block Diagram

SW1

AC INLET/FUSE HOLDER

SWITCH

A4

POWER SUPPLY

A3

INTERFACE PCB ASSY

A2

THERMAL PRINTER 50 MM

50 MM CSCAN

A1

FRONT PANEL ASSY

A3J4

A2J3

A3J5

W3P2

W3P1

A4J2

A4J1

W2P1

W2E1

SW1J1

W1E1

W1E2

SW1J5

A3J3 A3J2

A1P1

A2J1

E1

CHASSIS

"D"

E2

CHASSIS

E3

CHASSIS

W3

W1

E4

CHASSIS

"A"

YEL/GRN

GND CHOKE

W2E2

SW1J4

SW2

GRAPH STOP

LED2

PAPER

LED1

POWER

GND

W2

GRN YEL

ASYNC

COMM

AUTOPORT

OR

M-PORT

IEC CONN

BLUBRN

Revision A PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer 5-7

2006503-001

Upper Level Assembly: Wiring Diagram

Wiring Diagram

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

1

2

3

4

1

2

3

4

5

1

2

A2J3 A3P4 A2J3 A3P4

A3J5 A4J2

A4J1

SW1J1

A1P1

W3P2 W3P1

W2P1

W2E1

A2J1

SW1J4

W2E2

1

2

3

4

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

+V

+V

RETURN

AC LINE

AC

NEUTRAL

+3.3V

FP POUT LED

FP PWR LED

FP BUTTON

RETURN

RETURN

ASYNC RX

ASYNC TX

WRITER WR IRQ

RETURN

RETURN

RETURN

RETURN

RETURN

RETURN

RETURN

RETURN

RETURN

RETURN

RETURN

RETURN

V+

V+

V+

V+

V+

V+

V+

V+

V+

V+

WRITER D0

WRITER D1

WRITER D2

WRITER D3

WRITER D4

WRITER D5

WRITER D6

WRITER D7

WRITER WE*

WRITER CS*

WRITER OE*

WRITER RESET*

WRITER BUSY

+3.3V

+3.3V

1

2

3

4

5

ASYNC COMM

M-PORT*

1

2

3

4

5

A3J3

A3J2

6

7

8

6

7

8

9

CTRLTGH

NC

CTRLTGL

NC

GLSML

NC

NC

NC

GLSMH

NC

NC

SID+

RETURN

dTxD

SID-

dRxD

NC

1

2

3

4

5

AUTOPORT*

A3J3

6

7

8

NC

NC

TX

RETURN

DEVICE ID

RX

NC

NC

* PRN 50s have either an M-Port or

an AutoPort. They do not have BOTH.

5-8 PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer Revision A

2006503-001

Upper Level Assembly: Packaging

Packaging

Revision A PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer 6-1

2006503-001

6 Interface PCB

6-2 PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer Revision A

2006503-001

Interface PCB:

For your notes

Revision A PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer 6-3

2006503-001

Interface PCB: General

General

The purpose of the 801390-002 (PRN 50-M) and 801390-001 (PRN 50)
Interface PCBs is to provide power distribution and interface electronics
for the PRN 50-M and PRN 50 Digital Writ ers.

&$87,21

This assembly is extremely static sensitive and should be
handled using the precautions described in “Controlling

Electrostatic Discharge Damage” on page 3-4 of this

manual.

Theory

The 801390-002 (PRN 50-M) and 801390-001 (PRN 50) Interface PCBs
provide power distribution and interconnection for the PRN 50-M and
PRN 50 Digital Writers. Two host interfaces are provided for. Use the
RS-232 (M-Port or AutoPort) interface with newer hosts. An RS-422
interface is provided to maintain compatibility with the 7160 DDW. All
hosts that connect to the 7160 DDW can connect to the PRN 50-M and
PRN 50. All the necessary supply voltages for the PRN 50-M and PRN 50
are generated and distributed on this board. A serial EEPROM is used to
store the necessary identification information.

+3.3V

Converter

CPU PCB

M-Port or
AutoPort

RS-422

J3

J2

J5

J4

+15V

RS-232

Tranceiver

RS-422

Tranceiver

6-4 PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer Revision A

2006503-001

Interface PCB: General

+3.3V Switching Regulator Circuit

The +V power source uses a LM2674 step-down (buck) regulator to
generate a +3.3VDC logic supply. This board and the 801406-001 CPU
board uses this +3.3VDC logic supply. The LM2674 series operates at a
switching frequency of 260kHz with a typical efficiency of 86%. The
LM2674 contains an internal FET switching at 260kHz which, when
turned on, drives an increasing current from Vin (pin 7) through the
inductor L1 to the output capacitor C7 and to the load. Energy is stored
in the inductor as the current increases with time. When the FET switch
turns off, the collapse of the magnetic field in L1 forces current to flow
through the catch diode CR1, charging C7. The output capacitor C7 is a
low ESR capacitor used to filter the output voltage.

+5VDC Linear Regulator

A +5VDC supply is generated from the +V power source using a 78M05
DPAK linear regulator. This supply if used by the RS-422 interface
circuitry.

Serial EEPROM

The serial EEPROM stores the identification information required for all
AutoPort devices. The EEPROM control, address, data, and power are all
handled by one pin. After the unit has been assembled, the unit type
number and model number are programmed into the EEPROM. The
following is the type number, and the various model numbers:

RS-422 Transceiver

The RS-422 transceiver is used to convert the CPU transmitted data
from +3.3V logic levels to RS-422 levels, and convert the received RS-422

Revision A PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer 6-5

2006503-001

Interface PCB: General

Power Supply Requirements

Input / Output Signal Requirements

J1 Connector

J2 Connector–M-Port

Table 4. Power Supply Requirements

Voltage Limits Current J5

+15V +14V to +16V 75 mA 1, 2

Table 5. Connector (J1)

Pin # Signal Name Level Direction Description

1 CTRLTGH RS-422 Output RS422 differential drive
2 nc 5V ground
3 CTRLTGL RS-422 Output RS422 complement differential drive
4 nc no connection
5 GLSML RS-422 Input Anode side input
6 nc no connection
7 nc no connection
8 nc no connection
9 GLSMH RS-422 Input Cathode side input

shell CHASSIS chassis ground

Table 6. RJ45 Connector (J2) (M-Port; 801390-002)

Pin # Signal Name Level Direction Description

1NC
2 NC
3 SID+ RS-232 Output RS-232 transmit
4 RETURN Power Input RS-232 signal common
5 dTxD TTL Bi-directional Device identification
6 SID– RS-232 Input RS-232 receive

7 dRxD TTL Input RS-232 clear-to-send
8 NC

6-6 PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer Revision A

2006503-001

Interface PCB: General

J2 Connector–AutoPort

J5 Connector

Table 7. RJ45 Connector (J2) (AutoPort; 801390-001)

Pin # Signal Name Level Direction Description

1NC
2 NC
3 TX RS-232 Output RS-232 transmit
4 RETURN Power Input RS-232 signal common
5 DEVICE_ID TTL Bi-directional Device identification
6 RX RS-232 Input RS-232 receive
7NC
8 NC

Table 8. Power Connector (J5)

Pin # Signal Name Level Direction Description

1 +V Power Input input positive supply
2 +V Power Input input positive supply
3 RETURN Power Input input return supply
4 RETURN Power Input input return supply

Revision A PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer 6-7

2006503-001

Interface PCB: Parts List 801390-002A

Parts List 801390-002A

Table 9. 801390-002 Parts List

Reference

Designation

Description Part Number Qty

C1 Cap, AL, 22µF, 20%, 35V, 5MM, Low Z 419448-001 1
C2 Cap, Cer, 1000pF, 5%, 50V, SM 411575-003 1
C3, 5, 6, 11, 14 Cap, Cer, 0.1µF, 5%, 50V, SM 411575-012 5
C4, 8, 9, 10, 13 Cap, Cer, 0.1µF, 5%, 16V 411575-002 5
C7 Cap, Tant, 100µF, 10%, 10V, SM 415802-001 1
C12 Cap, Tant, 3.3µF, 10%, 16V, SM 406883-005 1
C15 Cap, Cer, 0.1µF, X7R, 50V, SM 1187-104 1

CR1 Diode, Schottky, Barrier, 1A, 40V, SM MBRS140T3 403187-001 1
CR2 Diode, Rectifier, Schottky, SM MBR0520 413970-001 1

FB1, 2, 3, 4, 5, 6, 7 Ferrite Bead BLM11A601 414061-001 6

J2 Connector, RJ45, Vertical, 8-Pin 1807-005 1
J3 Conn, Plug, 9 Pos, Vert 405104-001 1
J4 Conn, 40P, Vert, Blind Mate, Male 420610-001 1
J5 Connector, PC Header, 4-Pin - w/Locks 406492-004 1

L1 Inductor, 47µH, =1/-20%, 0.9A, SM 420713-001 1

R1 Res, Cer, 100¾, 1%, 1/16W, SM 410334-003 1
R2, 4 Res, Cer, 33.2 ¾, 1%, 1/8W, SM 1082-788 2
R3, 7 Res, Cer, 10K, 1%, 1/16W, SM 410334-013 2
R5 Res, Cer, 0¾, 1%, 1/16W, SM 410334-027 1
R8 Res, Cer, 1K, 1%, 1/16W, SM 410334-008 1

TP1, 2, 3, 4 PC Post 415396-001 4

U1 Diode Array, ESD/Overvoltage Protection, Six Pair, SM 412586-002 1
U2 IC, EEPROM, 1-Wire, 256 Bit, SM 417652-002 1
U3 IC, Reg, LM2674, 3.3 Switcher, SM 420714-001 1
U4 IC, Transceiver, MAX3221 419512-001 1
U5 Line Driver, Dual, SM 9638 407884-001 1
U6 AND Gate, 2-Input, Quad TC7S08F 409035-001 1
U7 Isolator, Optically-Coupled, SM 2602 407164-001 1
U8 Volt Rgltr, Pos 5V, 700mA, SM 78M05 412613-001 1

VR1, 2 Diode, 600W, 15V, SM 405485-001 2
VR3 Diode, Transient Voltage Suppressor, 5V, 600W P6SMB6.8AT1 403189-001 1

6-8 PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer Revision A

2006503-001

Interface PCB: Parts Location Diagram 801390-002A

Parts Location Diagram 801390-002A

Revision A PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer 6-9

2006503-001

Interface PCB: Schematic Diagram SD801390-002A

Schematic Diagram SD801390-002A

Sheet 1 of 3

6-10 PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer Revision A

2006503-001

Interface PCB: Schematic Diagram SD801390-002A

Sheet 2 of 3

Revision A PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer 6-11

2006503-001

Interface PCB: Schematic Diagram SD801390-002A

Sheet 3 of 3

6-12 PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer Revision A

2006503-001

Interface PCB: Parts List 801390-001A

Parts List 801390-001A

Table 10. 801390-002 Parts List

Reference

Designation

Description Part Number Qty

C1 Cap, AL, 22µF, 20%, 35V, 5MM, Low Z 419448-001 1
C2 Cap, Cer, 1000pF, 5%, 50V, SM 411575-003 1
C3, 5, 6, 11, 14 Cap, Cer, 0.1µF, 5%, 50V, SM 411575-012 5
C4, 8, 9, 10, 13 Cap, Cer, 0.1µF, 5%, 16V 411575-002 5
C7 Cap, Tant, 100µF, 10%, 10V, SM 415802-001 1
C12 Cap, Tant, 3.3µF, 10%, 16V, SM 406883-005 1
C15 Cap, Cer, 0.1µF, X7R, 50V, SM 1187-104 1

CR1 Diode, Schottky, Barrier, 1A, 40V, SM MBRS140T3 403187-001 1
CR2 Diode, Rectifier, Schottky, SM MBR0520 413970-001 1

FB1, 2, 3, 4, 5, 6, 7 Ferrite Bead BLM11A601 414061-001 7

J2 Connector, RJ45, Vertical, 8-Pin 1807-005 1
J3 Conn, Plug, 9 Pos, Vert 405104-001 1
J4 Conn, 40P, Vert, Blind Mate, Male 420610-001 1
J5 Connector, PC Header, 4-Pin - w/Locks 406492-004 1

L1 Inductor, 47µH, =1/-20%, 0.9A, SM 420713-001 1

R1 Res, Cer, 100¾, 1%, 1/16W, SM 410334-003 1
R2, 4 Res, Cer, 33.2 ¾, 1%, 1/8W, SM 1082-788 2
R3, 7 Res, Cer, 10K, 1%, 1/16W, SM 410334-013 2
R5 Res, Cer, 0¾, 1%, 1/16W, SM 410334-027 1
R8 Res, Cer, 1K, 1%, 1/16W, SM 410334-008 1

TP1, 2, 3, 4 PC Post 415396-001 4

U1 Diode Array, ESD/Overvoltage Protection, Six Pair, SM 412586-002 1
U2 IC, EEPROM, 1-Wire, 256 Bit, SM 417652-002 1
U3 IC, Reg, LM2674, 3.3 Switcher, SM 420714-001 1
U4 IC, Transceiver, MAX3221 419512-001 1
U5 Line Driver, Dual, SM 9638 407884-001 1
U6 AND Gate, 2-Input, Quad TC7S08F 409035-001 1
U7 Isolator, Optically-Coupled, SM 2602 407164-001 1
U8 Volt Rgltr, Pos 5V, 700mA, SM 78M05 412613-001 1

VR1, 2 Diode, 600W, 15V, SM 405485-001 2
VR3 Diode, Transient Voltage Suppressor, 5V, 600W P6SMB6.8AT1 403189-001 1

Revision A PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer 6-13

2006503-001

Interface PCB: Parts Location Diagram 801390-001A

Parts Location Diagram 801390-001A

6-14 PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer Revision A

2006503-001

Interface PCB: Schematic Diagram SD801390-001A

Schematic Diagram SD801390-001A

Sheet 1 of 3

Revision A PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer 6-15

2006503-001

Interface PCB: Schematic Diagram SD801390-001A

Sheet 2 of 3

6-16 PRN 50-M (M-Port) and PRN 50 (AutoPort) Digital Writer Revision A

2006503-001

Interface PCB: Schematic Diagram SD801390-001A

Sheet 3 of 3