Hillrom Affinity Three User manual

SERVICE MANUAL
Affinity® Three
Birthing Bed
and
Affinity® Four
Birthing Bed
From Hill-Rom
Product No. P3700
MAN272 REV 4

Affinity® Three Birthing Bed and Affinity® Four Birthing Bed Page i
Service Manual (MAN272 REV 4)
© 2011 by Hill-Rom Services, Inc. ALL RIGHTS RESERVED.
No part of this text shall be reproduced or transmitted in any form or by any
means, electronic or mechanical, including photocopying, recording, or by any
information or retrieval system without written permission from Hill-Rom
Services, Inc. (Hill-Rom).
Fourth Edition, November 2011
First Printing 2000
Printed in the USA
Affinity® is a registered trademark of Hill-Rom Services, Inc.
Allen™ is a trademark of Easco Hand Tools, Inc.
CSA® is a registered trademark of Canadian Standards Association.
Freedom Hill™ is a trademark of Hill-Rom Services, Inc.
Hill-Rom® is a registered trademark of Hill-Rom Services, Inc.
Liberty Hill™ is a trademark of Hill-Rom Services, Inc.
Loctite® is a registered trademark of Henkel Corporation.
Mechlok® is a registered trademark of Crane Co.
Oilite® is a registered trademark of Beemer Precision, Incorporated.
Plexiglas® is a registered trademark of Arkema Corporation.
SideCom® is a registered trademark of Hill-Rom Services, Inc.
Slo-Blo® is a registered trademark of Littelfuse, Inc.
Stow and Go® is a registered trademark of Hill-Rom Services, Inc.
Torx® is a registered trademark of Acument Intellectual Property, LLC.
Underwriters Laboratories Inc.® is a registered trademark of Underwriters
Laboratories Inc.

Page ii Affinity® Three Birthing Bed and Affinity® Four Birthing Bed
Service Manual (MAN272 REV 4)
The information contained in this manual is subject to change without notice.
Hill-Rom makes no commitment to update or keep current, the information
contained in this manual.
The only product warranty intended by Hill-Rom is the express, written
warranty accompanying the bill of sale to the original purchaser. Hill-Rom
makes no other warranty, express or implied, and in particular, makes no
warranty of merchantability or fitness for a particular purpose.
Additional copies of this manual can be obtained from Hill-Rom.
To order additional copies of this manual (MAN272), refer to the back cover
for contact information. For countries not listed on the back cover, contact your
distributor.
NOTE:
The back cover is a comprehensive list of Technical Support contact
information for Hill-Rom. The product discussed in this manual may not be
available in all of the countries listed.

Affinity® Three Birthing Bed and Affinity® Four Birthing Bed Page v
Service Manual (MAN272 REV 4)
Table of Contents
Chapter 1: Introduction
Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 - 1
Audience. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 - 1
Reference Documents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 - 1
Document Symbols. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 - 2
Model Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 - 3
Safety Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 - 3
Warning and Caution Labels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 - 11
Chapter 2: Troubleshooting Procedures
Getting Started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 1
Test Equipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 2
Initial Actions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 3
Quick Reference Problem/Solution Matrix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 3
Function Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 4
Hilow System Functional Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 5
Trend-Like Position Functional Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 6
Head System Functional Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 7
Foot System Functional Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 8
Air System Functional Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 9
Other Bed Functional Checks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 9
Final Actions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 10
Hilow Drive Operation Failures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 11
Hilow Up Malfunction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 12
Hilow Down Malfunction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 14
Head Drive Operation Failures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 16
Head Up Malfunction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 17
Head Down Malfunction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 19
Foot Drive Operation Failures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 21

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Page vi Affinity® Three Birthing Bed and Affinity® Four Birthing Bed
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Foot Up Malfunction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 22
Foot Down Malfunction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 24
Hilow Up Malfunction (When The Foot Section Is Lowered). . . . . . . . . . . . . . . 2 - 26
Brake Caster Malfunction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 27
Bed Air Surface Malfunction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 28
Night Light Does Not Illuminate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 34
Siderail Mechanism Does Not Hold. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 35
Trend-Like Position Malfunction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 36
Battery Back-up Malfunction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 37
CPR Release Malfunction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 39
Chapter 3: Theory of Operation
Electrical System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 1
Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 6
Chapter 4: Removal, Replacement, and Adjustment Procedures
Tool and Supply Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 1
Top Motor Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 3
Bottom Motor Cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 5
Hilow Drive Motor Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 7
Hilow Limit Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 11
Head Drive Motor Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 16
Foot Drive Motor Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 19
Foot Limit Switch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 22
CPR Release . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 26
Trend-Like Position Sensing Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 28
Trend-Like Position Gas Spring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 30
Head Section Gas Spring and Damper (CPR Assist) . . . . . . . . . . . . . . . . . . . . . . 4 - 32
Foot Support Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 34
Night Light and Cable Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 37
Mattress Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 38
Labor Grips. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 39
Foot Section (Lift Off) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 41
Foot Section (Slide Off) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 43

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Affinity® Three Birthing Bed and Affinity® Four Birthing Bed Page vii
Service Manual (MAN272 REV 4)
Line Voltage Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 45
Battery Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 47
Bed Surface Air System Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 51
Air System Manifold Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 54
Air System Control P.C. Board Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 55
Logic Control P.C. Board Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 57
Transformer Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 61
Auxiliary Transformer Assembly (Affinity® Three Bed) . . . . . . . . . . . . . . . . . . 4 - 63
Lockout Switch Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 65
Siderail Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 67
Patient Siderail (Inboard) P.C. Switch Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 69
Caregiver Siderail (Outboard) P.C. Switch Board . . . . . . . . . . . . . . . . . . . . . . . . 4 - 71
Central Braking System—P3700A Model Only . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 73
Central Braking System—P3700B Model Only. . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 77
Caster Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 80
Stow and Go™ Foot Section Wire Form . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 83
Central Braking System—P3700B Model—New Brake Style . . . . . . . . . . . . . . 4 - 86
Caster Assembly—New Brake Style . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 89
Line Manager . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 92
Push Handles. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 94
Permanant IV Pole—P3732A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 95
Chapter 5: Parts List
Service Parts Ordering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 1
Exchange Policy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 3
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 5
Recommended Spare Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 7
Caster Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 9
Base Module—P/N63951S (Sheet 1 of 2) (Affinity® Three Bed). . . . . . . . . . . . 5 - 10
Base Module—P/N63951S (Sheet 2 of 2) (Affinity® Three Bed). . . . . . . . . . . . 5 - 14
Main Frame Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 16
Siderail Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 20
Electronics Module (Sheet 1 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 24

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Electronics Module (Sheet 2 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 27
Electronics Module (Sheet 3 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 28
Electrical Cable Routing (Sheet 1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 30
Electrical Cable Routing (Sheet 2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 32
Sleep Deck Module (Sheet 1 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 34
Sleep Deck Module (Sheet 2 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 38
Sleep Deck Module (Sheet 3 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 40
Label Module (Sheet 1 of 4)—P3700A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 44
Label Module (Sheet 2 of 4)—P3700A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 46
Label Module (Sheet 3 of 4)—P3700A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 48
Label Module (Sheet 4 of 4)—P3700A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 49
Foot Support Module—P3700A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 50
Calf Support Module—P3700A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 54
Air Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 56
Headboard—Wood Style . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 58
Caster Module—P3700B/C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 59
Base Module—P3700B/C (Sheet 1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 60
Base Module—P3700B/C (Sheet 2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 64
Sleep Deck—P3700B/C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 66
Foot Support Module—P3700B/C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 70
Calf Support Module—P3700B/C/D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 74
Label (Sheet 1 of 4)—P3700B/C/D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 76
Label (Sheet 2 of 4)—P3700B/C/D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 78
Label (Sheet 3 of 4)—P3700B/C/D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 82
Label (Sheet 4 of 4)—P3700B/C/D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 86
Caster Module—P3700D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 89
Base Module—P3700D (Sheet 1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 90
Base Module—P3700D (Sheet 2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 94
Sleep Deck—P3700D. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 96
Foot Support Module—P3700D. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 100
Main Frame Module—P3700D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 104
Sleep Deck Module—P3700D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 108

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Service Manual (MAN272 REV 4)
Push Handles. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 110
Line Manager . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 111
Chapter 6: General Procedures
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 - 1
Steam Cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 - 1
Cleaning Hard to Clean Spots. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 - 2
Disinfecting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 - 2
Draping the Mattress. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 - 2
Caring for the Wood Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 - 2
Servicing the Bed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 - 3
Component Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 - 4
P.C. Boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 - 4
Lubrication Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 - 5
Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 - 6
Inspecting the Pivot Point Fasteners. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 - 6
Inspecting the Foot Supports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 - 7
Inspect for the Labor Grip Plugs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 - 8
Preventive Maintenance Schedule . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 - 10
Preventive Maintenance Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 - 13
Using Loctite® Adhesive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 - 15
Purple Loctite® Adhesive #222 (P/N SA4842) . . . . . . . . . . . . . . . . . . . . . . . 6 - 16
Blue Loctite® Adhesive #242 (P/N SA3618) . . . . . . . . . . . . . . . . . . . . . . . . 6 - 16
Red Loctite® Adhesive #262 (P/N SA4841) . . . . . . . . . . . . . . . . . . . . . . . . . 6 - 16
Red Loctite® Adhesive #271 (P/N SA4840) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 - 16
Chapter 7: Accessories
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 - 1
Labor Bar (P3613) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 - 3
Oxygen Tank Holder (P276). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 - 5
Telescoping Calf Supports (P35745A) or
Telescoping Full Leg Supports (P7634C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 - 6

Table of Contents
Page x Affinity® Three Birthing Bed and Affinity® Four Birthing Bed
Service Manual (MAN272 REV 4)
NOTES:

Affinity® Three Birthing Bed and Affinity® Four Birthing Bed Page 1 - 1
Service Manual (MAN272 REV 4)
1
Chapter 1
Introduction
Purpose
This manual provides requirements for the Affinity® Three Birthing Bed and
Affinity® Four Birthing Bed normal operation and maintenance. It also
includes parts lists (in chapter 5) for ordering replacement components.
Audience
This manual is intended for use by facility-authorized personnel only. Failure
to observe this restriction can result in severe injury to people and serious
damage to equipment.
Reference Documents
For more information (such as operating instructions, features, specifications,
and product symbols), refer to the Affinity® Three Birthing Bed and Affinity®
Four Birthing Bed User Manual (USR025).

Document Symbols
Chapter 1: Introduction
Page 1 - 2 Affinity® Three Birthing Bed and Affinity® Four Birthing Bed
Service Manual (MAN272 REV 4)
Document Symbols
This manual contains different typefaces and symbols to make the content
easier to read and understand:
• Standard text—used for regular data.
•Boldface text—emphasizes a word or phrase.
•NOTE:—sets apart special data or important instruction clarification.
• WARNING or CAUTION
– A WARNING identifies situations or actions that may have an
effect on patient or user safety. To ignore a warning could cause
patient or user injury.
– A CAUTION identifies special procedures or precautions that
persons must obey to help prevent equipment damage.

Model Identification
Chapter 1: Introduction
Affinity® Three Birthing Bed and Affinity® Four Birthing Bed Page 1 - 3
Service Manual (MAN272 REV 4)
1
Model Identification
For bed model identification, see table 1-1 on page 1-3.
Table 1-1. Model Identification
Safety Tips
Train and educate your staff on the hazards associated with electric beds. Do
not allow personnel to have their entire body below the sleep surface and
within the confines of the bed. Unplug the bed from its power source and
engage the lockout control prior to cleaning or servicing it. If service personnel
need to get under the bed, they must block up the hilow portion as an added
precaution. Ensure that the foot section is properly mounted to the yoke.
We urge you to incorporate these safety tips into your procedures for the safety
of both patients and staff.
Bed Position
To reduce the severity of falls by patients, always leave the bed in the low
position when the patient is unattended.
Siderails
Leave the siderails fully up and locked when the patient is left unattended.
When raising the siderails, be sure that you hear the click that signals the up
and locked condition. Give the siderails a tug to check that they are firmly in
position.
Siderails are intended as a reminder, not a restraint device. Appropriate
medical personnel should determine the level of restraint necessary to ensure a
patient remains safely in bed.
Model Number Description
P3700A Affinity® Three Birthing Bed
P3700B Affinity® Four Birthing Bed, introduces Stow and
Go® Retractable Foot Section
P3700C Affinity® Four Birthing Bed, updated foot section
P3700D Affinity® Four Birthing Bed, introduces transport
handles

Safety Tips
Chapter 1: Introduction
Page 1 - 4 Affinity® Three Birthing Bed and Affinity® Four Birthing Bed
Service Manual (MAN272 REV 4)
Brake and Steer Pedals
Always keep the casters in the brake position when the bed is occupied.
Patients often use the bed for support when getting in or out of bed, and serious
injuries can result if the bed moves. After brakes are set, rock the bed gently to
ensure that they are locked.
Put the casters in the steer mode when moving the bed. This will make the bed
easier to position or transport.
Fluids
When massive spills occur in the area of the P.C. boards, motors, or
transformers, immediately:
1. Unplug the bed from its power source.
2. Take care of the patient.
3. Clean the fluid from the bed.
4. Have maintenance check out the bed completely. Fluids can short out
controls, making the bed inoperable or cause the bed to operate erratically.
Component failure caused by fluids can even cause the bed to operate
without warning, causing injury.
5. Do not place the bed back into service until it is unquestionably dry and
tested safe to operate.
Water Mattress
The excessive weight associated with water mattresses puts an undue stress on
the motor drives. In most cases, the patient’s weight plus the water mattress
weight exceeds the recommended bed capacity. Even more important is the
fact that water mattresses are subject to rupture, which would allow large
amounts of water to come into contact with the electrical components of the
bed. We recommend not using water mattresses.
Lockout Switch
Whenever a patient or visitor should be restricted from operating the siderail
controls, activate the lockout switch located at the head end of the bed (on the
main frame). The lockout switch is for the convenience of the staff and the
safety of the patient. Use the lockout switch when appropriate.

Safety Tips
Chapter 1: Introduction
Affinity® Three Birthing Bed and Affinity® Four Birthing Bed Page 1 - 5
Service Manual (MAN272 REV 4)
1
CPR Release
Only healthcare professionals should use the emergency CPR release. The two
release handles are located under the head section of the bed near the seat
section.
To activate the CPR release, pull the handle away from the bed. Continue to
pull out on the handle until the head section is flat. When this is complete,
attend to the patient. The bed will automatically flatten the head and seat
sections and reset itself to be ready to use after the emergency.
WARNING:
A bed that is transported with the steer caster locked in an incorrect
position can drift from side to side during transport. Personal injury or
equipment damage could occur.
WARNING:
Only facility-authorized maintenance personnel should troubleshoot the
bed. Troubleshooting by unauthorized personnel could result in
personal injury or equipment damage.
WARNING:
Unplug the bed from its power source and disconnect the battery
back-up before checking ohms/resistance measurements. Failure to
disconnect line voltage to the bed can damage the VOM and cause
equipment damage or personal injury.
WARNING:
Refer to your VOM owner’s manual for complete and detailed
information regarding the operation of your VOM. Failure to do so could
result in personal injury or equipment damage.
WARNING:
You must use the 2" x 4" pieces of lumber to support the bed. The bed
will fall during this procedure if not supported. Failure to do so could
result in personal injury or equipment damage.

Safety Tips
Chapter 1: Introduction
Page 1 - 6 Affinity® Three Birthing Bed and Affinity® Four Birthing Bed
Service Manual (MAN272 REV 4)
WARNING:
Prop up the head section before removing the cotter pins and clevis
pins. Failure to do so could result in personal injury or equipment
damage.
WARNING:
You must use the 2" x 4" pieces of lumber to support the foot yoke. The
foot yoke will fall during this procedure if not supported. Failure to do so
could result in personal injury or equipment damage.
WARNING:
The head end of the main frame is supported by the two Trend-Like
position gas springs. Any servicing will require that a support device be
placed just beneath the head end of the main frame. Failure to do so
could result in personal injury or equipment damage.
WARNING:
Do not attempt to remove the gas spring with the head section fully
raised and the spring compressed. Lower the head section until the
cylinder of the gas spring is free in the slide bracket of the main frame,
and support the head section securely before removing the cotter pins
and clevis pins. Failure to do so could result in personal injury or
equipment damage.
WARNING:
Failure to properly mount the foot section to the yoke latches could
result in equipment damage or personal injury.
WARNING:
Failure to properly mount the foot section to the yoke slide brackets
could result in equipment damage or personal injury.
WARNING:
Adhere to all electrical safety precautions when servicing the bed's
electrical system. Failure to do so could result in personal injury or
equipment damage.

Safety Tips
Chapter 1: Introduction
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Service Manual (MAN272 REV 4)
1
WARNING:
Ensure that the bed is stable before removing the caster. Failure to do
so could result in personal injury or equipment damage.
WARNING:
Follow the product manufacturer’s instructions. Failure to do so could
result in personal injury or equipment damage.
WARNING:
Adhere to the Infection Control Policies and Procedures from Hill-Rom.
Failure to do so could result in the spread of infection.
WARNING:
Powered bed mechanisms can cause serious injury. Operate the bed
only with persons clear of mechanisms. Failure to do so could result in
personal injury or equipment damage.
WARNING:
Unplug the bed from its power source and engage the lockout control
during routine maintenance or cleaning. Refer to the Affinity® Three
Birthing Bed and Affinity® Four Birthing Bed User Manual (USR025)
and specific sections in this service manual for additional precautions.
Failure to do so could result in personal injury or equipment damage.
WARNING:
Ensure that all electrical/mechanical loads are removed prior to
maintenance/repair of the bed’s drive system or other mechanical
assemblies. Failure to do so could result in personal injury or equipment
damage.
WARNING:
Visually inspect the bushings annually. If wear is apparent, replace
them. Failure to do so could result in personal injury or equipment
damage.

Safety Tips
Chapter 1: Introduction
Page 1 - 8 Affinity® Three Birthing Bed and Affinity® Four Birthing Bed
Service Manual (MAN272 REV 4)
WARNING:
Only facility-authorized personnel should perform preventive
maintenance on the bed. Preventive maintenance performed by
unauthorized personnel could result in personal injury or equipment
damage.
WARNING:
Inspect the pivot point fasteners semi-annually. Failure to do so could
result in personal injury or equipment damage.
WARNING:
Use primers with adequate ventilation. Avoid skin contact and
prolonged or repeated breathing of vapors. Do not allow primers to be
trapped under rings, watch bands, etc. Observe all directions on the
primer can. Failure to do so could result in personal injury.
WARNING:
Avoid excessive or repeated skin contact with the liquid. Repeated
contact with the liquid could result in personal injury.
WARNING:
The labor bar is intended to be used in the prescribed manner only.
Failure to use this product as outlined may result in personal injury or
equipment damage.
WARNING:
Insufficient tightening will allow the cradles to slip and lose their original
position. Personal injury could occur.
WARNING:
The supports are intended to be used in the prescribed manner only.
Failure to use this product as outlined may result in personal injury or
equipment damage.
WARNING:
Unplug the unit from its power source. Failure to do so could result in
personal injury or equipment damage.

Safety Tips
Chapter 1: Introduction
Affinity® Three Birthing Bed and Affinity® Four Birthing Bed Page 1 - 9
Service Manual (MAN272 REV 4)
1
WARNING:
The voltage in the electrical system presents an electrical shock
hazard. Perform standard electrical service procedures before
attempting service within the P.C. board enclosure. Adhere to all
electrical safety precautions when servicing the bed’s electrical system.
Failure to do so could result in personal injury or equipment damage.
WARNING:
Do not expose the unit to excessive moisture which would allow liquid
to pool. Personal injury or equipment damage could occur.

Safety Tips
Chapter 1: Introduction
Page 1 - 10 Affinity® Three Birthing Bed and Affinity® Four Birthing Bed
Service Manual (MAN272 REV 4)
CAUTION:
Remove the battery if the bed will not be in service for extended periods
of time. Failure to do so could result in damage to the life of the battery,
or damage to the bed. Contact the appropriate maintenance personnel.
CAUTION:
Do not position the head of the bed against a wall or beneath any
fixtures. This is to prevent damage due to the arcing motion of the bed
while the bed is being raised and lowered.
CAUTION:
Ensure that the night light is not damaged when the bed is being
lowered. Failure to do so could result in equipment damage.
CAUTION:
Do not pull on the mattress material when unfastening the mattress
retaining snaps. Unfasten the mattress retaining snaps at the snap
location. Failure to do so could result in equipment damage.
CAUTION:
Ensure that the fuse housing is properly oriented for the voltage rating
(110-120V or 220-240V) on the bed that you are servicing. Failure to do
so could result in equipment damage.
CAUTION:
Do not cut or remove the cable ties that secure the battery leads to the
electronics pan. This ensures the proper connection of the batteries
during the replacement procedure. Possible equipment damage could
occur if the cable ties are removed.
CAUTION:
To prevent component damage, ensure that your hands are clean, and
only handle a P.C. board by its edges. Failure to do so could result in
equipment damage.