Eschmann RX-500 Service manual

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Page 1

RX500

OPERATION TABLE

Service Manual

698265

T-SM13h

Page 2

Preliminary Information

Technical Data

Safety Notes

Introduction

Description

Maintenance

Eschmann After Sales Service Department

The Eschmann After Sales Service Department is staffed and equipped to provide advice and assistance during normal office hours. To avoid delays when making enquires, please quote the Model and Serial Number of your Operation Table which is shown on the Serial Number plate, the location of which is shown below. Please ensure you include all alpha and numeric digits of the Serial Number .

The Serial Number Plate is on the inside of the long trunk section here.

For further information visit www.eschmann.co.uk

All correspondence relating to the after sales service of Eschmann Equipment to be addressed to :

UK Customers

Eschmann Equipment, P eter Road, Lancing, W est Susse x BN15 8TJ , England. Tel: +44 (0) 1903 765040. Fax: +44 (0) 1903 762006.

Overseas Customers

Contact your local distributor. In case of doubt contact Eschmann Equipment.

Patents and Trade marks

The ESCHMANN name and logo are registered tr ade marks of Eschmann Holdings Limited . “Eschmann Equipment” is a trading name of Eschmann Holdings L imited. “RX600” is a tr ade mark of Eschmann Holdings L imited.

Patents: GB 2260075 & GB 2242624; F rance 536922 & 450836; US5116032;

Germany P69206378.1 & P69104883.5; Italy 536922 & 450836. Patents pending in Japan, application n umbers 263630/92 & 97990/91.

All rights reserved. This booklet is protected by cop yright. No part of it may be reproduced, stored in a retriev al system or transmitted in any form or by any means , electronic, mechanical, photocopying, recording or otherwise without written permission from Eschmann Holdings Limited. The information in this publication was correct at the time of going to print. The Company , howe ver, reserves the right to modify or improve the equipment referred to .

If the CE mark is affixed to the product, it indicates compliance with Council Directive 93/42/EEC of 14 June 1993 concerning medical devices.

T-SM13h October 2002

Service Manual

Page 3

RX500RX500

RX500

RX500RX500

OPERATION TABLE

READ THESE INSTRUCTIONS BEFORE USE

Keep these Instructions in a saf e convenient place for future ref erence. Read in conjunction with the relevant Publications detailed in the preliminary information section.

CONTENTS

Section Contents Page

1. PRELIMINARY INFORMATION ..................... 4

2. TECHNICAL DAT A.......................................... 4

3. SAFETY NOTES ............................................ 5

4. INTRODUCTION............................................ 6

General ....................................................... 7

Electrical System ........................................ 7

Main Control Board ................................. 7

Height Opto Board .................................. 7

Tilt Opto Board........................................ 7

Base Distribution Board .......................... 8

Top-Of-Column Distr ibution Board .......... 8

Top-Of-Column Solenoids Board ............ 8

Power Circuits ......................................... 8

Hand Control ........................................... 8

Footswitch ............................................... 8

Ta ble-Base ON/OFF Control ................... 8

Built-in Battery Charger........................... 9

External Batter y Charger ........................ 9

Standby System Connections................. 9

5. DESCRIPTION ............................................. 10

6. MAINTENANCE ........................................... 14

General ..................................................... 14

Cleaning and Storage ............................... 14

General Care and Lubrication................... 14

Gas Springs .......................................... 14

Head, Leg, & Infill Sections................... 14

Head, Leg, & Infill-Locking Mech. ......... 14

Long and Short Tr unk Sections ............. 14

Radiographic Tops................................. 14

Underside of the Table Base ................. 14

Access to Fuses.................................... 15

Hand control.......................................... 15

After Maintenance................................. 15

Functional Checks .................................... 15

General ................................................. 15

Hydraulic System...................................... 18

General ................................................. 18

Topping-Up Reservoir ........................... 18

Adjustments .............................................. 18

Trendelenburg Microswitch ................... 18

Lateral Tilt Opto..................................... 18

Break Microswitch................................. 19

Tilt Switch.............................................. 20

Removal and Installation........................... 20

General ................................................. 20

Remove Table Base Covers .................. 20

Install Table End Base Covers .............. 20

Remove Top-Of-Column Covers ........... 21

Install Top-Of-Column Covers ............... 21

Releasing Telescopic Cover & Upstand 21 Refixing Telescopic Cover & Upstand ... 21

Removing the Telescopic Cover............ 21

Replacing the Telescopic Cover ............ 21

Section Contents Page

Remove Long & Short Trunk Assemblies . 23 Install Long & Short Trunk Assemblies . 23

Remove Break Cylinder ........................ 26

Install Break Cylinder ............................ 26

Remove Lateral Tilt Cylinder................. 27

Install Lateral Tilt Cylinder..................... 27

Remove Trendelenburg Cylinder........... 27

Install Trendelenburg Cylinder............... 28

Remove Height Cylinder ....................... 28

Install Height Cylinder ........................... 28

Gas Spring Replacement...................... 29

Remove Batteries.................................. 29

Install Batteries ..................................... 29

Remove the Base Feet ......................... 29

Install the Base Feet ............................. 30

Infill interlocking mechanism replacement ..............

Push button replacement and adjustment ..............

Remove/Install Hydraulic Components .. 30 Remove/Install Electrical Components... 30

Fault Diagnosis ......................................... 31

Table 1: Fault Diagnosis ........................ 31

Circuit Diagram Index............................ 30

Table 2: Codes for 2-Digit Display ......... 34

FIGURES

1 RX500 Operation Table .................................. 6

2 RX500 Operation Table: Base Details .......... 10

3 RX500 Operation Table: Column/Trunk Detail 12 4 RX500 Operation T ab le: Base 5 RX500 Operation T able: Base

6 Table Tilted for Access .................................. 15

7 Base Detail Table Tilted ................................ 15

8 Main Control Board....................................... 15

9 Hydraulic System - Schematic Diagram....... 16

10 Hydraulic System - Main Components ......... 17

11 Trendelenburg Microswitch ........................... 19

12 Lateral Tilt Opto ............................................ 19

13 Break Microswitch ........................................ 19

14 Tilt Switch ..................................................... 20

15 Cover Retaining Push Riv ets........................ 21

16 Top of Column Hinge Assembly Detail ......... 22

17 Top of Trendelenburg Cylinder...................... 23

18 Break Cylinders ............................................ 24

19 Lateral Tilt Cylinder ....................................... 25

20 Trendelenburg Cylinder ................................ 27

21 Top of Column Detail .................................... 28

22 Bottom of Height Cylinder Detail .................. 28

23 Gas Spring Detail ......................................... 29

24 Base Feet Detail ........................................... 29

25 Infill interlocking mechanism......................... 30

26 Catch mechanism......................................... 30

27 Hand Control Functions................................ 34

28-35Circuit Diagrams*................................. 35-40

(* also see Circuit Diagram Index on page 33)

(short trunk end) ....

(long trunk end) .....

30 30

13 13

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1. PRELIMINARY INFORMATION

1.1 This Service Manual should be referred to for details of the RX500 Powered Operation Table, REF 80-600-29 (series) and REF 80-600-61 (series) having Serial Number R5BC8J0000 or above.

Related Technical Publications, available on request from Eschmann Equipment :-

Instructions for Use - T-IM28 - RX500 Powered Operation Table Illustrated Parts List - T-IPL11- RX500 Powered Operation Table

1.2 Instruction and Service Manuals should be readily accessible for reference prior to and when operating, cleaning and servicing the Operation Table.

2. TECHNICAL DA TA

DIMENSION

Table with standard table-top (Fig. 1) :

Width including sidebars ............................. 560mm

Sidebars ......................................(31.75 x 6.35)mm

Overall length (with infill section)............... 2000mm

Minimum table height (without mattresses) ....... 700mm

Maximum table height (without mattresses) ....1040mm

SAFETY

The table is built to comply with BS5724 Part 1, BS5724 Part 2 Section 2.22, IEC601-1, IEC601-1-2:1993 and BS6859 Part 1. The mattresses comply with BS2891.

TABLE LOADING

The standard table (Fig. 1) satisfies a static load test in accordance with the requirements of BS5724

SYMBOLS & SAFETY CLASSIFICATIONS

Caution Refer to the accompanying documents, the “Instructions for Use”.

or IPX 4 indicates that the equipment will withstand a moderate quantity of fluid spilled from above.

Safety Category

Indicates that the equipment is in safety category BF, i.e. it is manufactured to a

safety standard which agrees with international regulations for medical electrical equipment, and provides a high degree of protection against electric shock. The symbol also indicates that the equipment will not be damaged by defibrillator discharge.

Indicates that the equipment is in safety

category B, i.e. it is manufactured to a safety standard which agrees with international regulations for medical electrical equipment, and provides a minimum degree of protection against electric shock.

Class 2 Indicates that the built-in battery

charger is designed to electrical protection Class 2.

MOVEMENTS

Maximum Trendelenburg....................................35°

Maximum Reverse Trendelenburg......................35°

Maximum Lateral Tilt (left and right)...................15°

Maximum Extension......................................... 220°

Maximum Flexion.............................................130°

Head section adjustment ................................ ±45°

Leg section adjustment ......................... (-100+10)°

Note: With the table at minimum height, maximum Trendelenburg, and maximum head and leg section movements are reduced due to physical restrictions (i.e. proximity of floor)..

WEIGHT (nominal)

Ta ble with standard table-top (Fig. 1)............ 300kg

Anaesthetic Proof

Indicates that the parts of the equipment marked AP are designed for use within a distance of (5 to 25cm) of a part of an enclosed medical gas system. BS5724 Part 1, 1989 refers.

Indicates that the parts of the equipment marked APG are designed for use within a distance of 5cm of a part of an enclosed medical gas system. BS5724 Part 1,1989 refers.

WARNING

The head section of this operation table is classified as ‘EQ UIPMENT not suitable f or use in the presence of a flammable anaesthetic mixture with air or with Oxygen or Nitrous Oxide’ and is NOT classified as ‘Category AP Equipment’ or ‘Category APG Equipment’ when it (the head section) is in its lowest position and the table top is in full Trendelenburg position.

Inspection

The table must be inspected at regular intervals, and if necessary , serviced, to ensure that it complies with all AP and APG requirements relevant to physical deterioration or breakage of electrical components, connections and cable insulation.

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2. TECHNICAL DA TA

MISCELLANEOUS

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OPERATION TABLE

Antistatic requirements

The table has an antistatic pathway from the tabletop, through an internal resistor to the castors, which are held in contact with the floor at all times.

CAUTION

1. T o complete the antistatic pathway , the tabl e must be used on an electrically conductive, or on an antistatic floor.

2. Always use purpose-designed Eschmann mattresses to maintain the antistatic pathway.

Electrical data System Power

Batteries:

Type....................................... Two sealed lead-acid

Output (each) ......................................... 12V 24Ah

Built-In Battery Charger:

Input ...................................... 200-240Vac 50/60Hz

Output ..............................27.6Vdc (nom) 3A (max)

System Fuses:

Motor....................................... 30A 1.5in. (AGU 30)

Base Control Board: (1)........ F6.3A 250V 20mm

(1)........ T2.5A 250V 20mm

(1)........... T2A 250V 20mm

CAUTION

This equipment contains environmentally hazardous lead-acid batteries. If the batteries fail, or if the equipment is to be disposed of, it is recommended that the batteries are taken to a disposal site designated for the disposal of leadacid batteries, or that the batteries are collected by an agent who specialises in the collection of lead-acid batteries.

Hydraulic Oil

Type.....................Eschmann RX (Part No. 699408)

3. SAFETY NOTES

Attention to the following points will prolong the life and efficiency of the RX500 Powered

Operation Table and will help to avoid the risk of accidents, or damage.

DO:

♦ Keep the Instruction Manual close-to-hand. ♦ Read the instructions carefully before using table. ♦ Check that the head and leg sections are secure,

and put the table base in the braked position before use.

♦ Disconnect the built-in battery charger from the

power supply and switch tab le off before washing.

♦ Read and follow the instructions f or cleaning, and

for the care of the mattresses.

♦ Use the correct mattresses and accessories. ♦ Remove table accessories and their clamps (in

particular rotary clamps) from sidebars, when they are not being used.

♦ Ensure that the table is serviced at regular intervals

(every 6 months is the recommended frequency) by Eschmann personnel only , or accredited agents.

DO NOT:

♦ Lift the table by its table-top. ♦ Push the table over rough surf aces, use a trolley . ♦ Drop the table (or individual sections). ♦ Put heavy weights on the table sections. ♦ Put sharp objects on, or against, mattresses,

pads, or the radiographic table-tops.

♦ Drop heavy objects onto the radiographic tab le-tops. ♦ Spill oil, ether, or other fluids onto the

mattresses or the pads.

♦ Pull the table by any of the table-top sections,

always push it.

♦ Hold or support the leg section by its black

radiographic top, as this is a remov able item and

might come off. Note: The table cannot be used (under normal circumstances) with table base standby door open.

WARNING

The RX500 Powered Operation Table has been designed to minimise the possibility of accidental electrosurgery burns. Contact with any metal surfaces (e.g. table side bars, or other equipment etc.) can cause burns during electrosurgery and must be avoided. With the table in (or during transition into) the castor position, the centre of gravity of the patient (normally the perineum) should lie no more than 200mm away from the centre of the column (i.e. no more than the length of the short trunk section). Whenever this is not practical the overhanging weight of the patient and table should be adequately supported (e.g. by at least two able people). Also see Warnings in Instruction for Use and within the text of this publication.

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4. INTRODUCTION

View on ‘A’

1. Head section

2. Infill section

3. Short trunk section

4. Long trunk section 5 Leg section

6. Release bar

7. Gas springs

8. Release button (leg section removal)

9. Release button (Infill section removal)

10. Hand control

11. Release button (head section removal)

12. Release bar

13. Telescopic column

14. Table base

15. Hand control or footswitch socket

16. Hand control or footswitch socket

View on base short trunk end

17. Hand control plug

18. Table

19. Push button switches to engage standby hydraulic connectors

20. Standby hydraulic connectors

21. Quick-charge external battery charge socket

22. High current 30A fuse

23. Standby door microswitch

24. Standby power pack connector

25. Standby door

26. Built-in battery charger socket

27. Battery charger ‘on’ indicator (green)

28. Battery charger door

29. Removable mains lead

30. Cover retaining screws

31. Top of column covers

View on base long trunk end

(on/off) switch

Fig. 1 RX500 Powered Operation Table

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4. INTRODUCTION

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OPERATION TABLE

GENERAL

4.1 This Service Manual contains a technical description and maintenance procedures for the RX500 Pow ered Operation Table.

4.2 The RX500 Pow ered Operation Table is a fully mobile table with a five section top comprising short and long trunk sections, an interchangeable infill section and head and leg sections.

4.3 The table enables a full range of surgical and radiographic procedures to be done including: general, urological, gynaecological, cardiothoracic, ophthalmic, ENT and neurosurgical. Certain procedures require the addition of specific accessories, information about which is availab le on request.

4.4 The RX500 Powered Operation Table is an electro-hydraulically operated, battery powered unit, remotely operated from a touch-button hand control, or a footswitch, both plug into the top of the table column

4.5 Power is provided by tw o 12V sealed lead-acid batteries in the table base. The 12V batteries are connected in series to give an output voltage of 24V. T rickle charging for the batteries is pro vided by an inbuilt battery charger, provision is also made for connection of an external battery charger for quick battery charging.

4.6 All table top trunk movements are electrically controlled using either the hand control or, as an optional accessory the four function foots witch (height and Trendelenburg only) which is used by the surgeon during certain procedures.

4.7 The operation table has these main sections:

G Base. G Central column. G Long trunk. G Short trunk. G Interchangeable head, leg and infill sections.

NOTE: Instr uction and Service manuals should be readily accessible for reference prior to, and when operating, cleaning, and servicing the table.

ELECTRICAL SYSTEM

NOTE: Electrical/electronic circuit diagrams are

provided at the end of this Manual in section 6 (see index page 33).

Main Control Board

4.8 The main control board receives signals from the hand control via an RS485 serial communication link. The board also receives signals from the footswitch, base cover switches, levelling microswitches, tilt switch, opto boards, standby unit socket, door switch and table on/off controls.

4.9 Outputs from the main control board pass to the hand control via an RS485 serial communication link, to the hydraulic solenoids via the top-of-column distribution and solenoid boards, and to the base distribution board, motor on/off control and motor direction control. The main control board is supplied with 24V d.c. from the batteries and generates its own 12V d.c. and 5V d.c. supplies.

4.10 The principal functional areas of the main control board are:

- Input buffering (pull-up and pull-down resistors and capacitors).

- The microcontroller, which uses software to implement table control functions.

- Output buffering (current drivers and le vel shifters).

- Motor direction dr ive and on/off control.

Height Opto Board

4.11 The height opto board is fitted at the base of the column in a fixed position relative to the baseplate . It responds to a metal reflector plate which moves up and down with the column chassis and hence with the table top. When the reflector mo ves in front of the three reflective opto sensors (only two are used) electrical signals are generated to signal to the main control board that the table is at or above ‘minimum height’, or in the ‘castor’ position.

4.12 When the reflector plate is in front of reflective opto coupler 01 and at the correct distance from it, a signal is produced which passes via J1 on the opto board and the 10-way ribbon cable to J22 on the main control board.

4.13 When the reflector plate is in front of both reflective opto couplers 01 and 03 signals from both pass to the main control board which stops the table movement at the correct position.

Tilt Opto Board

4.14 The tilt opto board is fitted at the top of the column in a fixed position relative to the y oke. It responds to a metal plate which moves with the yok e and hence with the table top. When the reflector moves in front of the opto sensors electrical signals are generated to signal the main control board that the table is lev el.

4.15 When the reflector plate moves in front of the opto sensor, a logic signal 0 is produced which passes via J1 on the opto board to the top of column distribution board and then via a 10-way ribbon cable to J2-4 on the main control board.

4.16 When the reflector plate is not in front of the opto sensor, a logic signal 1 is produced which is passed to the main control board as above.

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Page 8

4. INTRODUCTION

Base Distribution Board

4.17 This board receives signals from the main control board for the height (extend) solenoid, the height (contract) solenoid, the pump-isolate (forw ard) solenoid and the pump-isolate (reverse) solenoid.

4.18 The board also passes signals to the main control board from the cover microswitches .

4.19 Any inductive ov erswings from the solenoids are blocked by diodes Dl to D4. PL7 on the base distribution board is connected via a 14-way ribbon cable to J4 on the main control board.

Top-of-Column Distribution Board

4.20 This board connects to J2 on the main control board via a 34-way retractable ribbon cable which terminates on PL1 of this board. It distributes signals to 10-way hand control/footswitch sockets PL2 and PL3, and to:

G the tilt switch via PL7 G the Trendelenburg level position microswitch

via PL5

G the lateral tilt opto board via PL4 G the break level position microswitch via PL6 G top-of-column solenoids board via PL8 G table ON/OFF switch via PL9

Top-of-Column Solenoids Board

4.21 This board receives signals on J7 via a 10way ribbon cable from J8 on the top-of-column distribution board to drive the top-of-column solenoids via cage clamp connectors J1 to J6. It also blocks inductive overs wings from solenoids using diodes D1 to D6.

Power Circuits

4.22 The power source for the table are two 12V, 24Ah sealed lead acid batteries connected in series. A 30A in-line, high current fuse protects the batteries, motor, FET’ s , rela y and interconnections. The fuse is fitted on a panel in the table base.

4.23 Current from the batteries passes via the reversing rela y , where it is s witched by the FET’ s, and then passes to the pump motor and returns to the batteries. The 24V d.c. supply is also routed to the hydraulic solenoids and the main control board.

Hand control

4.24 The RX500 hand control communicates with the main control board via an RS485 serial communication link. The hand control contains a microcontroller which receives inputs from the hand control buttons and generates outputs which go to the hand control LED’s and the hand control audib le warning device. The microcontroller uses software to implement hand control, control functions.

4.25 The hand-control incorporates a 2-digit display that indicates a code if a problem should occur. Such problems could be the result of the user pushing a button in the wrong sequence or at the wrong time or of a system failure (see Table 1 - Fault Diagnosis, Ta ble 2 - Codes for 2-Digit display and Fig. 27)

Footswitch (Optional Accessory)

4.26 The footswitch plugs into either of the two 10way sockets used by the hand control. It uses the same +5V d.c. and 0V pins, but the signal lines are different from those of the hand control. The f ootswitch does not use a serial communication link.

4.27 There are four functions on the footswitch:

G Height up G Height down G Trendelenburg G Reverse Trendelenburg.

4.28 Each of these f our functions is associated with two microswitches mounted inside the body of the footswitch, one normally open and the other normally closed. The normally open microswitch for each function is connected on one side to the +5V d.c. line and on the other side to a common ‘alarm’ line. The normally closed microswitch for each function is connected on one side to the 0V line and on the other side to an individual input line on the main control board. If , for any function of the f ootswitch, e .g. height up, the normally open microswitch operates and the normally closed microswitch does not, or vice versa, the main control board will recognise a fault and freeze the table. The likelihood of two microswitches failing at the same time is very remote.

Table Base ON/OFF Control

4.29 An ‘on/off’ toggle switch, fitted on the top of the table column, switches 24V d.c. on the main control board. To isolate the system the 30Amp fuse should be removed.

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4. INTRODUCTION

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OPERATION TABLE

Built-in Battery Charger

4.30 This is a low current output ‘trickle’ charger which replenishes an average day’s table use of the batteries with an overnight charge.

4.31 The mains input comes via the mains lead, which should be fitted with a fused plug. The output of the charger is regulated to provide 27.6V d.c. to the batteries for float charging. This voltage will fall when the batteries are not completely charged and hence are drawing a significant current. The charger has short-circuit and thermal protection. There is an output from the board which supplies current to the batteries, an output to the ‘trickle’ charger indicator LED and an input from the external charger. Current from either the internal or the external charger is routed to the batteries via the ‘trickle’ charger board.

External Battery Charger (Optional Accessory)

4.32 The external battery charger plugs into the external battery charger socket in the table base and supplies current via the ‘trickle’ charger board to the batteries.

Standby System Connections

4.33 An RX Standby Unit (optional accessory) which provides standby hydraulic and electrical services, can be connected to the RX500 table via hydraulic connectors and an electrical socket behind the door on the table base (short trunk section end).

4.34 Next t o the h ydraulic connectors are two pushbuttons which release stored hydraulic pressure when the standby hydraulic connections are made. This is done by energizing the pump forward and reverse solenoids with power from the standby unit.

4.35 To connect the standby unit to the table it is necessary to open the base door. This operates a microswitch which disconnects the main control board solenoid control circuits from the solenoids so that they can be controlled by the standby unit, also the pump motor is hydraulically isolated from the hydr aulic solenoids. The electrical signals from the standby socket pass to J1 on the main control board (15-wa y D-connector).

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Page 10

5. DESCRIPTION

For greater detail of

the table base ends also

refer to Fig. 4 and 5

Fig. 2 RX500 Operation Table : Base details, covers on and off

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5. DESCRIPTION

Key to Figs 2 and 3

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OPERATION TABLE

1. Short trunk assembly

2. Long trunk assembly

3. Lateral tilt cylinder

4. Wrap around

5. Tr unk assembly plastic covers

6. Wedge

7. Outer column

8. Battery

9. Manifold block No 1

10. Castor plate guide pillar

11. Hydraulic power unit

12. High current fuse, 30A

13. Mains socket

14. Battery charging LED (green)

15. Cover retaining screw location

16. External batter y charger socket

17. Drip gutter

27. Base distribution PCB

28. Castor frame assembly

29. Manifold block No 2

30. Door microswitch

31. Standby power pack connector

32. Standby hydraulic connectors

33. Push buttons to engage standby

hydraulic connectors

34. Hydraulic reservoir

35. Ribbon cable reel assembly

36. Top-of-column distribution PCB

37. Hinge

38. Lateral tilt opto board

39. Yoke

40. Cover microswitch

41. Table ‘on/off’ switch 42 Base seal

18. Opto reflector plate

19. Inner column

20. Manifold block No 4

21. Manifold block No 3

22. Upper bezel

23. Cable from hand control

24. Trendelenburg cylinder

25. Break cylinders

26. Main control PCB

43. Column seal

44. Long trunk base cover

45. Short trunk base cover

46. Telescopic column cover

47. Column upstand

48. Antistatic discharge path resistor

49. Base cover spring support

50. Base foot

51. Base skirt

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5. DESCRIPTION

Fig. 3 RX500 Operation Table : Column and trunk section detail

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5. DESCRIPTION

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OPERATION TABLE

1 Standby hydraulic push buttons 2 Base cover microswitch 3 Standby hydraulic connectors 4 High current (30A) fuse 5 Door Microswitch 6 Standby power pack connector 7 Base cover microswitch 8 External batter y charger socket 9 Fixing for cover retaining screw

Fig. 4 RX500 Operation Table Base Detail (Short trunk end)

1 Base cover microswitch 2 Base cover microswitch 3 Mains charging LED 4 Mains connection socket 5 Fixing for cover retaining screw

Fig. 5 RX500 Operation Table Base Detail (Long trunk end)

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6. MAINTENANCE

GENERAL

6.1 Maintenance of the RX500 Powered Operation Table falls into the following categories:

G Cleaning and storage. G Adjustments. G General care and lubrication. G Removal and Installation. G Functional checks. G Fault diagnosis. G Hydraulic system.

CLEANING AND STORAGE

WARNING

Always switch off table at table ‘ON/OFF’

switch (item 18, Fig. 1) prior to cleaning.

6.2 For cleaning and storage instructions of the table refer to the RX500 Powered Operation Table Instructions for Use (Publication No. T-IM28).

6.3 For cleaning and storage instructions of the table accessories refer to the Accessory Instructions for Use (Publication No. T-IM56).

Note: If the table is to be stored for an y length of time the head and leg sections should be fully lowered. This is necessary to ensure that the gas spring seals and pistons are kept lubricated.

GENERAL CARE AND LUBRICATION

6.4 Once a week proceed as follows:

Gas Springs

WARNING

The gas springs are filled with high pressure

gas. Do not attempt to open them.

CAUTION

Gas springs MUST NOT be additionally

lubricated.

6.5 The gas spring supports for the head and leg sections are sealed units which require no routine maintenance. Malfunction of a gas spring makes it impossible to lock the head or leg sections in position. Seepage of fluid indicates a failing unit.

6.6 If a gas spring is faulty, the complete unit must be renewed; gas springs are non-repairable items (see section 6.42).

Head, Leg and Infill Sections

6.7 Ser vice the head, leg and infill sections as follows:

i Apply a smear of light machine oil to the guide

pins of the head, leg and infill sections, and to the pivot pins of the head and leg sections.

ii Examine the head, leg, and infill sections for

signs of damage, particularly for scoring or bending of the attachment guide pins. On the head and leg sections only , examine the release

handles for signs of damage. iii Check the guide pin retaining screws for tightness. iv On the head and leg sections only, check the

hinge pivots, and particularly all pivot pin grub-

screws, for security. (Note that the grub screw

for the main hinge pivot pin is underneath the

radiographic top.) v Check the side bars for security. vi On the infill section, examine the guide pin

locking button de vices for damage and ensure

that the mechanism which prevents remo val of

the infill section before any attached section has

been removed, functions correctly (refer to

sections 6.48 and 6.49). Apply a smear of light

machine oil to all moving parts.

Head, Leg & Infill Sections Locking Mechanisms

6.8 Remove the head, leg and infill sections from the table and clean out any collected fluff or other debris from guide pin sockets in the ends of the trunk sections. Spray a little aerosol lubricant into each sock et. Chec k the operation of locking mechanisms when re-attaching the sections (for adjustment refer to section 6.48).

Long and Short Trunk Sections

6.9 i Apply a smear of light machine oil to the pivot

Radiographic T ops

6.10 Examine the radiographic tops for crac ks, chips

and scoring. Significant damage will necessitate replacement of the damaged section. Make sure that the radiographic tops are securely attached (not applicable to leg section).

Underside of the Table Base

6.11 To maintain the underside of the table base,

it is necessary to tilt the table onto its side as follows:

i If necessary, remov e head, leg and infill sections. ii Using the hand control, raise the table to its

iii Using the hand control, set the table top to the

Service the long, and short trunk sections as follows:

pins on the long and short trunk sections. Examine the guide pin button locking devices f or damage (for

adjustment refer to section 6.48). Apply a smear of light machine oil to all moving parts.

maximum height and make sure that the long and short trunk sections are level.

maximum lateral tilt position corresponding to the direction in which the table is to be tilted.

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6. MAINTENANCE

Fig. 6 Table tilted for access

iv Place an anaesthetist’s stool, or a similar strong

support, along one side of the table. With two people standing on the same side of the table as the support (one at each end), tilt the table over and gently lower it onto the support, making sure that it rests on the side bars of the long and short trunk sections as shown in Fig. 6.

6.12 With the table tilted, proceed as follows (referring to Fig 7):

i Examine the five base foot-pads f or damage or

excessive wear. If necessary, replace the appropriate base foot-pad as described in sections 6.43 & 6.44.

ii Clean each castor assembly making sure that

they are free of dust and debris. Lubricate the bearings of each castor with a light machine oil.

iii On completion, return the table upright.

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Access to Fuses

6.13 The mains fuse is found in the table base on the standby panel (item 4, Fig.4). The other three fuses are fitted on the main control PCB (see Fig. 8) in the base of the table underneath the covers. For access see sections

6.24 to remove the cov ers and 6.25 to refit them.

Hand control

6.14 The factory sealed hand control requires no maintenance. If a fault is suspected in the hand control first test all table functions using a hand control known to be fault free. If a fault is confirmed with the hand control the complete assembly (including lead and plug) should be replaced. (See Fig. 25 for hand control function details).

After Maintenance

6.15 After maintenance on the operation table, always check all functions (section 6.16) and lower the table fully.

FUNCTIONAL CHECKS

General

6.16 The following functional checks should be carried out after maintenance of the operation table, or after rectification of any faults:

i Check the state of batteries using the hand

control, codes 01 and 02 should not be displayed. If they are the table batteries need recharging.

ii Using the hand control, check that all table

movements agree with the Technical Data.

iii Using the foot control unit (optional extra),

check that the table mov ements are correct for Trendelenburg, Reverse Trendelenburg and Height.

iv Use hand control to check operation of the ‘auto

level’ function.

1 Castor assembly 2 Table base plate 3 Height cylinder pivot clamp blocks 4 Height cylinder 5 Base feet

Fig. 7 Base detail table tilted

1 Programmed microcontroller 2 Beeper 3 Fuses

Fig. 8 Main control Board

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Fig. 9 Hydraulic system - Schematic diagram

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6. MAINTENANCE

1 Manifold 1 2 Hydraulic connections 3 Power unit 4 Feed from reservoir 5 P ower unit electrical lead 6 Base distribution board 7 Base control board 8 Manifold 2 9 Trendelenburg cylinder 10 Tilt cylinder 11 Manifold 4 12 Manifold 3

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For break cylinders see Fig.18

and for height cylinder see Fig.22.

The lateral tilt cylinder is also

shown in greater detail in Fig.19.

Fig. 10 Hydraulic system - main components

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6. MAINTENANCE

HYDRAULIC SYSTEM

CAUTION

Scrupulous cleanliness is essential to prevent

contamination of the fluid in the hydraulic system.

Notes:

1 Use only Eschmann RX hydraulic oil, Part

No.699408, which is obtainab le from Eschmann Equipment or their accredited agents. Replace cap on oil container after use.

2 When replacing hydraulic components all Banjo

fittings must be tightened to a torque setting between 19 and 21 Nm.

3 The hydraulic system schematic diagram is

shown in Fig. 9 with the main components illustrated in Fig. 10. Individual cylinders are also shown in the ‘Removal and Installation’ section later in the manual.

General

6.17 If the table cannot be placed into the castor position using the hand control, it may be necessary to manually raise the table base. To raise the table base, proceed as follows:

i Remove table base covers, see section 6.24. ii Locate the Nyloc jacking nut at each corner of

the table base (see Fig.24, item 1) and wind the nuts down evenly to raise the table base.

iii Return Nyloc jacking nuts to the position shown

in Fig.24 (i.e. flush with the top of the guide pins) after corrective maintenance and replace covers as section 6.25.

Topping-up the Hydraulic Reservoir

6.18 Top-up the hydraulic reservoir as follows: i Set table to an appropriate height and remove

base covers as described in section 6.24.

ii Release the central column cover and remove

the upstand as described in section 6.28 and release bezel.

iii Retract all cylinder rams (see note below)

before filling reservoir so that true oil level can be established. Overfilling could cause damage to reservoir.

iv Remove the filler cap from the hydraulic

reservoir and fill the reservoir with Eschmann RX hydraulic oil (see Note 1 abov e) until oil leve l

is 13 mm below the filler hole of the reservoir. v Refit the filler cap on reservoir. vi Refit the central column cover and upstand as

described in section 6.29. vii Refit the base cov ers as described in section 6.25.

Note: Hydraulic cylinder r ams are retracted when the table top is positioned as follows, but care must be taken when moving the table into this position to av oid damage, sections will be very close to the floor :

• Minimum height and onto castors.

• Maximum extension achievable at the minimum height set above.

• Maximum tilt achievable with table at the minimum height and extension set abov e (tilt table such that the right hand side is lowered when viewed from long trunk end of table).

ADJUSTMENTS

Trendelenburg Microswitch

6.19 To check and adjust the Trendelenburg microswitch (item 3, Fig. 11) proceed as follows:

i Ensure the table is on a level surface. ii Using the hand control, move the table top to

the maximum Trendelenburg position.

iii On the hand control, press the ‘auto level’ button

and wait until the table top stops when level.

iv Using an inclinometer (on section radiopaque

top not the mattress), check the angle of the long trunk section in the horizontal plane.

v If the angle is more than one degree out in either

direction adjust the Trendelenburg microswitch as necessary, by releasing the adjusting screws (2, Fig. 11) and moving the microswitch in the appropriate direction, retighten the adjusting screws.

vi Repeat steps ‘ii-v’ until the long trunk section

stops level.

Lateral Tilt Opto

6.20 To check and adjust the lateral tilt opto (item 3, Fig. 12) proceed as follows:

i Ensure the table is on a level surface. ii Using the hand control, tilt the table top to the

maximum lateral tilt position (left or right).

iii On the hand control, press the ‘auto level’ button

and wait until the table top stops when level.

iv Using an inclinometer (on section radiopaque

top not the mattress), check the angle of the table top in the lateral plane.

v If the angle is more than one degree out in either

direction adjust the flag (item 4, Fig. 12) of the lateral tilt opto by releasing the adjusting screws (item 2, Fig. 12) and moving the flag in the appropriate direction, retighten adjusting screws.

vi Repeat steps ‘ii-v’ until the table stops level.

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6. MAINTENANCE

1 Break cylinder 2 Microswitch adjusting screws 3 Trendelenburg microswitch 4Yoke 5 Pivot pin 6 Pivot pin set screw 7 Tilt cylinder ram lock nut 8 Tilt cylinder ram

Fig. 11 Trendelenburg microswitch

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Break Microswitch

6.21 To check and adjust the break microswitch (item 1, Fig. 13) proceed as follows:

i Ensure the table is on a level floor. ii On the hand control, press the break

(extension) button and move the table top to the maximum break (extension) position.

iii On the hand control, press the ‘auto level’ button

and wait until the table top stops when level.

iv Using an inclinometer (on section radiopaque

top not the mattress), check that the long trunk section is level, if it is not adjust the Trendelenburg microswitch as detailed in section 6.19.

v Using an inclinometer (on section radiopaque

top not the mattress), check the angle of the short trunk section.

vi If the angle is more than one degree out in either

direction adjust the break microswitch by releasing the adjusting screws (items 4, Fig.

13) and moving the microswitch in the appropriate direction, retighten the adjusting screws.

vii Repeat steps ‘ii-vi’ until the short trunk section

stops level.

1 Break microswitch 2 Long trunk assembly 3 Short trunk assembly

1Yoke 2 Adjusting screws 3 Lateral tilt opto board 4 Lateral tilt opto flag 5 Top of column distribution board

Fig. 12 Lateral tilt opto detail

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4 Adjusting screws 5 Tilt cylinder ram 6 Break cylinder ram

Fig. 13 Break microswitch

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6. MAINTENANCE

Tilt Switch

6.22 To adjust the tilt switch (item 4, Fig. 14) proceed as follows:

i Ensure the table is on a level floor. ii On the hand control, press the ‘auto le vel’ button

and wait until the table top stops when level (check the long and short truck sections are level in both directions and adjust if required as detailed in sections 6.19 and 6.21).

iii On the hand control, press patient left

orientation button (button 1, Fig. 27).

iv On the hand control, press the reverse

Trendelenburg button (button 4, Fig. 27) and move the table top to the maximum reverse Trendelenburg position.

v Using an inclinometer (on the radiopaque top

not the mattress of the long trunk section), check the angle of the table top. The angle should be 35 degrees.

vi On the hand control, press the break (extension)

button and check f or movement of the short trunk section of the table top. If movement occurs, adjust the tilt switch by releasing the adjusting screws (item 3, Fig. 14) and moving the tilt switch in the appropriate direction to stop any movement of the short trunk section with the table top in the reverse Trendelenburg position.

vii After adjusting the tilt switch repeat actions (iv)

(v) and (vi) until there is no movement of the short trunk section in the maximum reverse Trendelenburg position.

REMOVAL AND INSTALLATION

General

6.23 All equipment in the base of the operation table is accessible after the base covers have been removed (see section 6.24). To gain access to equipment located around the central column it is necessary to remove the top-of-column covers (see section 6.26) and release the central column cover and upstand if required (see section 6.28).

Remove Table Base Covers

6.24 T o remove table base co vers proceed as follows: Open doors at the ends of the table base, see Fig.1.

i ii At the long trunk end of the table base:

(a) Remove two screws (item 30, Fig. 1) and shouldered washers and pull the long trunk end base cover (item 44, Fig. 2) from the base.

iv At the short trunk end of the table base:

(a) Remove the two black button co vers from the standby hydraulic push buttons (item 19, Fig. 1) by gently pulling them off.

(b) Remove two screws (item 30, Fig. 1) and shouldered washers and pull the short trunk end base cover (item 45, Fig. 2) from the base .

v Remove the two base seals (item 42, Fig. 2).

The column seal (item 43, Fig. 2) can remain in place on the upstand unless access is required to the lower column (see section 6.28).

Note: When the hinged co v er at the short trunk end of the table is opened, or when the base cover is removed, a microswitch operates to isolate the electrical supply to the table. To operate the table with this cover removed, the microswitch must be taped in the operated position.

Install Table End Base Covers Note: Before replacing covers chec k that all cables

and hydraulic pipes are secured and that they cannot be pinched, chaffed or cut by any moving parts.

6.25 To install table end base covers proceed as

follows referring as required to Fig.1 and 2 :

1 Push button 2 Short trunk assembly 3 Adjusting screws 4 Tilt switch

Fig. 14 Tilt switch

i Check that all tools and discarded equipment

have been removed from inside table base before installing base covers.

ii To install the short trunk end base cover:

(a) Press the two springs at the short trunk end of the base and locate the short trunk base cover in the slide rails along the sides of the base .

(b) Push the end co ver fully home and secure with two screws and shouldered washers, finally replace the two push button covers.

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iii T o install the long trunk end base cov er proceed

as follows ref erring as required to Fig.1 and 2 : (a) Press two spr ings at the long trunk end

of the base and locate the end cover in the slide rails along the sides of the base.

(b) Push the end cover onto the base until it is approximately 3 to 4 mm from the short trunk end base cover.

(c) Push two base seals into position between the end base covers, and push the long trunk end base cover fully into position. Secure the long trunk base cover using two screws and shouldered washers.

(d) If removed replace the column seal onto the upstand, it may be necessary to leave the column seal to contract after initial assembly before butting the edges together, do not stretch the seal or trim length.

(e) Test cover pressure microswitches.

Remove T op-of-Column Covers

6.26 T o remove the tw o top-of-column covers (item 31, Fig. 1) proceed as follows:

i Using the hand control or foot switch control

unit set the table to full height and full flexion position.

ii Switch the table ‘off’, unplug hand control and

remove the main 30 Amp fuse from the table base (item 22, Fig. 1).

iii Remove the four screws and washers on the

top of the covers and the two push rivets (see Fig. 15) at the bottom edge of the covers.

iv Release the two top-of-column co vers taking care

when removing the covers to ensure that the gaiter for the Trendelenburg cylinder is not damaged.

Install T op-of-Column Covers Note: Before replacing covers chec k that all cab les

and hydraulic pipes are secured and that they cannot be pinched, chaffed or cut by any moving parts.

6.27 Installation of the top-of-column covers is the reverse of the remo val procedure described in section

6.26. When installing the top-of-column cov ers make sure that the gaiter for the Trendelenburg cylinder is correctly installed.

Releasing the telescopic cover and upstand

6.28 To release the telescopic cover and upstand (items 46 and 47, Fig. 2) proceed as follows:

i Remove the top-of-column covers as described

in section 6.26.

ii Remove all the push rivets (see Fig. 15) holding

the telescopic cover to the top bezel to enable

the cover to be lowered. iii Flex upstand to release cover from its lower edge. iv Remove the 4 slotted screws and the base seal

(item 42, Fig.2) from the lower edge of the

upstand and remove the upstand (if access to

the lower column is required).

Refixing the telescopic cover and upstand

Note: Before refitting covers and upstand chec k that

all cables and hydraulic pipes are secured and that they cannot be pinched, chaffed or cut b y any moving parts and that the ribbon cable mechanisms are working correctly.

6.29 Refit telescopic cover and upstand (if removed for access to lower column) b y the rev erse of section

6.28 but note that it may be necessary to leave the base seal to contract after initial assembly to the upstand to allow the edges to butt together (do not trim length to fit).

Removing the telescopic cover

6.30 T o remove the telescopic cov er (items 46, Fig.

2) proceed as follows:

To remove rivets :

a) Pull up plunger head (see 2 above) taking care not

to damage rivet head.

b) Pull rivet out of cover section (see 1 abov e).

To replace riv ets : a) Align holes in cover sections (see 1 above). b) Place rivet into hole so that the shoulder of the rivet

shaft is flush with the outer cover face (see 2 abo ve).

c) Press rivet plunger head until flush with cover surface

(see 3 above).

Fig. 15 Cover retaining push rivets

i Remove the top-of-column covers as described

in section 6.26.

ii Remove all the push rivets (see Fig. 15) holding

the telescopic cover to the top bezel. Then remove the rivets in each pair of telescopic cover section (top pair first then middle and lower) and remove the telescopic cover. Remove the upstand if required as detailed in section 6.28.

Replacing the telescopic cover

Note: Before refitting covers check that all cables and

hydraulic pipes are secured and that they cannot be

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6. MAINTENANCE

1 Yoke piv ot bolt 2 Spring washer 4Yoke 5 Sel-Lok pin 6 Tilt opto flag 7 Yoke pivot 8 Tilt opto board 9 Top of column

casting 10 Washer 11 Yok e piv ot bush 12 Tilt hanger 13 Microswitch plate 14 Microswitch 15 Microswitch

adjusting screws 16 Top of column

distribution board 17 Hinge plate 18 Height cylinder

locking screws 19 Column assy.

inner

NOTE: Revised new yoke assembly (preferred): New ‘Thrust washer’ (item 10, Part number 110905) either side of item 19. Thrust washers orientation is important, position black f ace of both tow ards head of piv ot bolt. Use ne w ‘W asher’ (item 2, Part number

110904) and modified bush (no shoulder), with ‘Loctite 270’ (Part number 110906) on screw thread of item 1.

Fig. 16 Top of column hinge assembly detail

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pinched, chaffed or cut by any moving parts and that the ribbon cable mechanisms are working correctly.

6.31 Refit the telescopic covers (and upstand if removed) in pairs in the correct sequence so they work correctly by the reverse of section 6.30.

Remove Long and Short Trunk Assemblies

6.32 To remove the long and short trunk assemblies proceed as follows:

i Remove the head, leg, and infill sections. ii Remove the top-of-column covers as described

in section 6.26.

iii Remove the black tops, side bars, aluminium

covers, plastic covers and hinge covers from the long and short trunk assemblies.

iv Disconnect the hydraulic hoses (item 3 and 5,

Fig. 18) from the two break cylinders (item 7, Fig. 18) and blank off the hydraulic connections and cylinders.

v Remove two screws (item 3, Fig. 14),

shakeproof washers and plain washers which secure the tilt switch (item 4, Fig. 14) to the short trunk assembly and remove the tilt switch.

vi Remove the lateral tilt opto flag (item 4, Fig.

12) to prevent damage by removing the two adjusting screws (item 2, Fig. 12).

vii Remove the two screws (item 2, Fig. 11) ,

shakeproof washers and plain washers which secure the Trendelenburg microswitch (item 3, Fig. 11) to the tilt hanger (item 12, Fig. 16) and remove the Trendelenburg microswitch and microswitch plate (item 13 and 14, Fig. 16).

ix Remove the ty-wrap straps which secure the

hydraulic hoses and the electrical wires to the yoke and move the hydraulic hoses and electrical wires clear of the yoke. Note routing and attachment of hoses and wires.

WARNING

The long and short trunk assemblies are heavy, two people are needed to lift them. The next stages will enable the table top assemblies to move freely in Trendelenburg and then tilt positions and will need to be firmly supported until they have been removed and placed aside.

x Remove the two dome headed nuts (item 1,

Fig. 17) and plain washers from the Trendelenburg cylinder pivot pin on the underside of the long trunk assembly. Remove the pivot pin (item 4, Fig. 17) and disconnect the Trendelenburg cylinder ram from the long trunk assembly. Collect the two spacers (item 5, Fig.17) which are fitted on the pivot pin.

xi Remove the grub screw (item 5, Fig. 19) which

retains the pivot pin for the lateral tilt cylinder (item 1, Fig. 19). Remove the pivot pin (item 6, Fig. 19) and disconnect the clevis (item 10, Fig. 19) on the lateral tilt cylinder ram from the tilt hanger (item 12, Fig. 16 and item 7, Fig. 19), take care not to misplace the bush inside the tilt hanger .

xii See note Fig. 16. Remove the he xagon headed

bolt (item 1, Fig 16), and shakeproof washer (item 2, Fig. 16).

xiii See note Fig. 16. The pivot pin (item 7, Fig. 16)

together with washer (item 10, Fig.16) which attaches the yoke (item 4, Fig.16) of the long trunk assembly to the hinge, can now be removed if the full weight of the Long and Short trunk assemblies are supported. Remove the long and short trunk assemblies and lay them aside upside down taking care to protect the radiopaque surfaces. Remove the Yoke pivot bush (item 11, Fig. 16) and Sel-Lok pin (item 5, Fig.16) if required from the yoke and inner column respectively.

Install Long and Short Trunk Assemblies Note:Before proceeding read the Caution and notes

Fig. 17 Top of T rendelenb ur g c ylinder

viii Remove the two screws (item 4, Fig. 13),

shakeproof washers and plain washers which secure the ‘break’ microswitch (item 1, Fig. 13) to the short trunk and remove the ‘break’ microswitch.

that precede section 6.17 and the WARNING above in section 6.32.

6.33 T o install the long and short trunk assemblies proceed as follows:

Note: Apply Rocol white grease (Part No.110477) to all pivot pins prior to assembly.

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6. MAINTENANCE

1 Short trunk assembly 2 Short tr unk pivot pin 3 Hydraulic connection 4 Hydraulic hoses 5 Hydraulic connection 6 Long trunk pivot pin 7 Break cylinder 8 Long trunk assembly 9 Break microswitch

Fig. 18 Break cylinders

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6. MAINTENANCE

1 Tilt cylinder 2 Hydr aulic connection 3 Top of column solenoid board 4 Clevis nut 5 Pivot pin grub screw 6 Pivot pin 7 Tilt hanger 8 Microswitch adjusting screws 9 Break microswitch 10 Clevis 11 ‘R’ clip 12 Washer 13 Pivot pin

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Fig. 19 Lateral tilt cylinder (upper bezel omitted for clarity)

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i Apply Rocol white grease (Part No.110477) to

the Yoke pivot bush (item 11, Fig. 16) and install into the inner column.

ii Using at least two people , carefully lift and correctly

position the long and short trunk assemblies onto the inner column hinge (item 9, Fig. 16) and replace the pivot pin washer and Sel-Lok pin (items 5,7 and 10, Fig. 16). Hold in place with he xagon headed bolt and shakeproof washer (items 1 and 3, Fig. 16).

iii Attach the eye-end of the Trendelenburg

cylinder to the pivot plates on the cross member of the long trunk assembly as follows (refer to Fig.17 and Fig. 19 as required) :

(a) P osition the eye-end of the Trendelenburg cylinder between the pivot plates on the cross member. (b ) Install pivot pin through one pivot plate on cross member and install one spacer on pivot pin. (c) Push pivot pin through the spacer and eyeend and install remaining spacer on the pivot pin. (d) Push the pivot pin through the second spacer and the second pivot plate. (e) Secure the pivot pin equally between the piv ot plates using the two dome nuts and plain washers.

iv Position the clevis on the tilt cylinder ram around

the tilt hanger and install the pivot pin taking care not to dislodge the bush in the tilt hanger . Secure the pivot pin in the lugs of the clevis with pivot pin grub screw.

v Route the hydraulic hoses and electrical wires

over the yoke in the same positions noted in the removal procedure.

vi Remove the blanks from the break cylinder

hydraulic hoses and connect the hydraulic hoses to each break cylinder.

vii Install the ‘break’ micros witch on the short trunk

assembly , ensuring that two spacers are installed behind the bracket, and secure with two scre ws, shakeproof washers and plain washers.

viii Install the Trendelenburg microswitch on the tilt

hanger with the microswitch plate and secure with two screws, shakeproof w ashers and plain washers.

ix Install the lateral tilt opto flag onto the hinge

pivot pin and secure with two screws, shakeproof washers and plain washers.

x Install the tilt switch on the inside web of the

short trunk section, ensuring wires for the switch faces toward the end of the short trunk. Secure the tilt switch with two screws, shakeproof washers and plain washers.

xi Use ty-wrap straps to secure the hydraulic

hoses and the electrical wires.

xii Top up the hydraulic system reservoir as

described in section 6.18.

xiii Check and adjust the T rendelenb urg and break

microswitches, later al tilt opto and tilt switch as described in sections 6.19-6.22.

xiv Carry out a full functional check of the operation

table as described in section 6.16.

xv Install plastic covers on the hinge pivot points

and install the plastic covers, aluminium outer covers, black tops and side bars on the long and short trunk assemblies. Make sure that the plastic covers and the aluminium outer covers do not protrude above the top face of the long and short trunk castings and that they do not restrict push button movement.

xvi Install top-of-column covers as described in

section 6.27.

Remove Break Cylinder Note: Before proceeding read the Caution and notes

that precede section 6.17.

6.34 To remove a break cylinder proceed as follows:

i At the applicable side of the long trunk

assembly , remov e the side bar, aluminium outer cover, inner plastic cover and the hinge cover.

ii Disconnect the three hydraulic hoses (item 4,

Fig.18) from the applicable break cylinder (item 7, Fig.18) and blank off the hydraulic connections and cylinder (items 3 and 5, Fig. 18).

iii At the short trunk end of the break cylinder,

remove the grub screw which secures the pivot pin (item 2, Fig. 18) and remove the pivot pin.

iv At the long trunk end of the break cylinder,

remove the grub screw which secures the pivot pin (item 6, Fig. 18) and remove the pivot pin.

v Remov e break cylinder from long trunk assembly .

Install Break Cylinder

6.35 To install a break cylinder proceed as follo ws (referring as required to Fig. 18) :

i Position the break cylinder in the long trunk

assembly with the cylinder eye-end positioned at the long trunk end.

ii Apply Rocol white grease (Part No.110477) to

the pivot pin for the long trunk end and install the pivot pin in the long trunk and the break cylinder eye-end. Secure the pivot pin to the long trunk with a grub screw.

iii Apply Rocol white grease (Part No.110477) to

the pivot pin for the short trunk end and install

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the pivot pin in the short trunk and the break cylinder

piston eye-end. Secure the pivot pin to the short trunk with a grub screw.

iv Remove the blanks from the three hydraulic

hoses for the break cylinder and connect the hydraulic hoses to the break cylinder.

v Top up the hydraulic system reservoir as

described in section 6.18.

vi Carr y Out a functional check of the operation

table as described in section 6.16.

vii Install the hinge cover, inner plastic cover,

aluminium outer cover, and side bar on the applicable side of the long trunk assembly . Make sure that the inner plastic cover and the outer aluminium cover do not protrude above the top face of the long trunk casting and that they do not restrict push button movement.

Remove Lateral Tilt Cylinder Note: Before proceeding read the Caution and notes

that precede section 6.17.

out a functional test of the operation table as described in section 6.16.

Remove T rendelenburg Cylinder Note: Before proceeding read the Caution and notes

that precede section 6.17.

6.38 To remove the Trendelenburg cylinder (item 2, Fig. 20) proceed as follows:

i Remove the top-of-column covers as described

in section 6.26, and release the central column telescopic cover as described in section 6.28.

ii Disconnect the two hydraulic hoses from the

Trendelenburg cylinder and blank off the hydraulic connections and cylinder (only one connection shown, item 3, Fig. 20, the second one is beneath the bellows).

6.36 To remov e lateral tilt cylinder (item 1, Fig. 19) proceed as follows:

i Remove the top-of-column covers as described

in section 6.26, and release the telescopic column cover as described in section 6.28.

ii Disconnect the two hydraulic hoses (item 2, Fig.

19) from the lateral tilt cylinder (item 1, Fig. 19) and blank off the hydraulic connections.

iii Remove the grub scre w (item 5, Fig.19) which

retains the lateral tilt cylinder pivot pin (item 6, Fig. 19) and remove the pivot pin. Disconnect the lateral tilt cylinder from the tilt hanger assembly (take care not to loose the bush in the tilt hanger).

iv At the column chassis, remove the ‘R’-clip (item

11, Fig. 19) from each end of the piv ot pin (item 13, Fig. 19). Remov e the washers (item 12, Fig.

19) and remove the pivot pin.

v Remov e the lateral tilt cylinder and remove clevis

if refitting a new cylinder by releasing nut (item 4 Fig. 19) and unscrewing cle vis (item 10, Fig. 19).

Install Lateral Tilt Cylinder

6.37 Installation of the lateral tilt cylinder is the reverse of the removal procedure, however, note the following points on installation and refer to Fig. 19 as required :

i Apply Rocol white grease (Part No.110477) to

the pivot pins prior to installation.

ii On completion, top-up the hydraulic system

reservoir as described in section 6.18, and carry

1 Trendelenb urg cylinder bello ws 2 Trendelenb urg cylinder 3 Hydraulic connection 4 Pivot pin nut 5 Spacers 6 Pivot pin

Fig. 20 Trendelenb ur g c ylinder

ii i At the long trunk assembly, remo ve the two dome

headed nuts (item 1, Fig. 17) and plain washers (item 6, Fig. 17) from the Trendelenburg cylinder

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pivot pin (item 4, Fig. 17) and remove the pivot pin to disconnect the eye-end of the Trendelenburg cylinder from the long trunk assembly (taking care to retain the spacers (item 5, Fig. 17).

iv At the column chassis, remove nut (item 4, Fig.

20) from each end of Trendelenburg cylinder pivot pin (item 6, Fig. 20) and remov e piv ot pin (take care to retain spacers item 5, Fig. 20).

v Remove the T rendelenb urg cylinder and remove

the eye end from the piston rod.

Install T rendelenburg Cylinder

6.39 Installation of the Trendelenburg cylinder is the rev erse of the remov al procedure, ho wever, note the following points on installation:

i Apply Rocol white grease (Part No.110477) to

the pivot pins prior to installation.

ii When connecting Trendelenburg cylinder to

long trunk assembly and column chassis ensure two spacers are fitted on each pivot pin.

iii On completion, top up the hydraulic system

reservoir as described section 6.18, and carry out a functional test of the operation table as described in section 6.16.

iv Remove the eight screws (item 8, Fig.22) and

washers and remove the two clamp b locks (item 3, Fig. 22) which attach the piv ot pin (item 9, Fig.

22) for the height cylinder to the base of the table .

v Disconnect the bottom hydraulic hose (Fig. 22,

item 6) withdraw the height cylinder from the tab le column and then reconnect the hose. Power cylinder to minimum height to return most of the hydraulic oil to the reservoir. Disconnect both hydraulic hoses and blank off the hydraulic connections and cylinder .

Fig. 22 Bottom of height cylinder detail

Remove Height Cylinder Note: Before proceeding read the Caution and notes

that precede section 6.17.

6.40 To remove the height cylinder power table to maximum height and proceed as follows:

i Remove top-of-column covers (see section 6.26). ii (WARNING The follo wing procedure will need

at least three people as the table is heavy. Extreme care must also be taken to avoid injury and damage to the table). Gain access

to the underside of the table base by carefully laying the table onto its side on the floor.

Fig. 21 Top of column detail

iii Locate and remove the four screws (item 2, Fig. 21)

in the hinge plate (item 3, Fig. 21) which secure the rod end of the height cylinder (item 4, Fig. 22).

vi Remove the pivot pin from the cylinder end of

the height cylinder and remove the rod end from the piston rod.

Install Height Cylinder

6.41 To install the height cylinder proceed as follows referring as required to Fig. 21 and 22 :

i Apply Loctite 222 (Part No.670650) to the threads

of the height cylinder piston rod and install the rod end on the piston rod of the height cylinder.

ii Remove the blanks from hydraulic hoses and

cylinder and connect the hoses to the height cylinder. P ower cylinder to maximum height and then disconnect the bottom hose.

iii Install the height cylinder in the table column

with the rod end upper most and reconnect the bottom hose. Make sure that the rod end seats correctly in the hinge plate.

iv Secure the rod end of the height cylinder to the

hinge plate with four set screws (item 2, Fig. 21). It

is important that the socket set screws are below flush of hinge plate when fully tightened. Note: Apply Loctite 222 (Part No.670650) to

the threads of the screws prior to installation.

v Apply Rocol white grease to the pivot pin and

install the pivot pin in the cylinder end of the height cylinder.

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vi Position the pivot pin on the base of the table

and secure it with two clamp blocks. Secure the

two clamp blocks with eight screws and washers . vii Place the operation table in the upright position. viii Top up the hydraulic reservoir as described in

section 6.18. ix Carr y out a functional check of the operation

table as described in section 6.16. x Install the top-of-column covers as described

in section 6.27.

Gas Spring Replacement

6.42 To remov e and replace a head or leg section gas spring proceed as follows :

Note: In Fig. 23 a head section is shown, the arrangement is basically the same for a leg section also see WARNINGS and Caution in section 6.4.

i Release gas piston nut (1, Fig.23) from link (4, Fig. 23) ii Release grub screw (2, Fig. 23) retaining pivot pin

(3, Fig. 23) and remo ve the pivot pin by inserting a

screw into the end of the pivot pin to aid remov al. iii Unscrew the gas spring piston from the link. iv Replace a new gas spring by the reverse of

above (adjusting it as below) and lubricate the

pivot pin with grease.

iv Using the cord provided, lift the batteries from

base.

Install Batteries

6.45 Installation of the batteries is the reverse of the removal procedure, then replace co vers as section

6.25.

Remove the Base Feet

6.46 To remov e the base f eet, proceed as f ollows: i With the table in the castor position remove the

base covers as described in section 6.24.

ii Remove each of the four corner feet as f ollows:

(a) Turn the Nyloc nut (1, Fig.24) down sufficiently to add and lock another nut onto it.

(b) Loosen the nut (4, Fig.24) securing the corner guide pin (2, Fig.24) to the base.

(d) Remove the foot from the base by pulling it away from the base with the tw o Sel-Lok pins.

iii To remove the fifth foot, proceed as follows:

(a) Remove the 30A fuse (item 4, Fig.4). (b) Remove the battery at the short trunk end

of the base (see section 6.43). (c) Remove one socket head countersunk

screw with spring washer and remove the foot from the base with the two Sel-Lok pins.

Fig. 23 Gas spring detail

v Adjust the gas spring by screwing the piston into

the link until the actuator nipple has 0.5-1.0mm clearance with the release bar and ensure that both gas springs of the section are adjusted to match. Finally tighten the piston nut (1, Fig. 23) onto the link.

Remove Batteries

6.43 To remove the batteries proceed as follows: i Remove the base covers as described in

section 6.24.

ii Remove the 30A fuse (item 4, Fig.4). iii Disconnect the positive (+) and negative (-)

leads from each battery.

Fig. 24 Base feet detail

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Install the Base Feet

6.47 To install the base feet, proceed as follows: i Install each of the four corner feet as follows:

(a) Fit two new Sel-Lok pins into the foot, ensuring they are pressed to the bottom of the blind holes.

(b) Position the foot on the base plate and secure it using corner guide pin, nut and spring washer (spring 3, Fig.24 should still be on guide pin).

24) up until it is flush with the top of the guide pin (item 2, Fig. 24) as shown in Fig. 24.

ii Install the fifth foot as follows:

(a) Fit two new Sel-Lok pins into the foot, ensur-ing they are pressed to the bottom of the blind holes.

(b) Position the fifth foot on the base plate and secure it using the socket head countersunk screw and spring washer.

iii Install the base covers as described in section 6.25

Infill interlocking mechanism replacement

6.48 To remove and replace the interlocking

mechanism in the infill section, refer to Fig. 25 and proceed as follows:

i Release each interlock rod (4 and 6) from the

connecting block (2) by releasing the grub screws in connecting block (2).

ii Replace any worn parts and reassemble as shown

in Fig. 25, with 5mm of rod 6 and 4mm of rod 4, protruding through the connecting block (2) and springs (3) correctly positioned. Finally adjust the mechanism by inserting tool No.1752 into the guide pin hole and pushing fully home, rod (4) should protrude 6.5mm out of the infill casting.

iii Lubricate all moving parts with a smear of light

machine oil and check operation, (i.e. a head or leg section guide pin (1) should operate the mechanism as shown in Fig.25).

Push button replacement and adjustment

6.48 To replace the push-button catches remove any attached table section, refer to Fig.26 and proceed as follows:

i Remove screw (1) to release the push-button.

The right hand push-button operates in conjunction with spring loaded plungers (2) which hold the push-button ‘in’ when pressed with a section in position. To access to these plungers place a screwdriver in catch retainer (3) and remove plungers (2) with spring.

Fig. 26 Catch mechanism

ii If the plunger has become damaged or distorted

it should be replaced. If the latch has scored the

guide pin of head, leg or infill section the complete push-button and guide pin should be replaced.

iii Reassemble using new parts as required with

Loctite on screw (1) and ensure free movement of all parts, lubricating with light machine oil. It is advised that setting tool number T1612 Part No. 759579 is used when finally adjusting push buttons as follows: a) Push setting tool T1612 into guide pin hole up to the edge of the groove and tighten screw (1) until the washer (5) just touches the side of the casting with the setting tool in place. b) Check the setting of the push button by sliding the tool in and out slowly , it should be possible to f eel the push button rubbing on the gauge by resting a finger lightly on the button and a slight jump of the button will be felt when the gauge contacts the button.

Removal and installation of hydraulic components Note: Before proceeding read the Caution and notes

that precede section 6.17.

6.50 The hydraulic power unit is replaced as a complete unit and is a self-evident procedure. The manifold and solenoid valve assemblies should be treated similarly. Hydraulic cylinder replacement is covered individually in sections 6.34 to 6.41. Check all table functions after removal and installation, as detailed in section 6.16.

Removal and installation of electrical components

6.51 All PCBs are non-repairable items and should

Fig.25 Infill interlocking mechanism

be replaced as complete units. Replacement of all electrical components is a self evident procedure.

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FAULT DIAGNOSIS

6.52 The fault diagnosis table that follo ws lists possible causes of faults and/or conditions that can be rectified during use, or maintenance procedures, depending on the remedy given. Electrical/electronic faults should be traced and rectified in conjunction with the relev ant circuit diagrams supplied (see Index on page 33). F or any faults, listed or not, which cannot be resolv ed, please contact the Eschmann After Sales Service Department; for details see inside front cover.

T ABLE 1 - FAULT DIAGNOSIS

Fault/Condition Possible Cause Remedy

1 Code 01 Battery voltage low, Charge batteries using

is displayed. i.e. below 18V d.c. on load. internal battery charger.

Engineer to check condition of batteries and replace if necessary .

2 Code 02 Battery voltage critically low, Charge batteries using

is displayed. i.e. less than 18V d.c. off load. external battery charger.

Engineer to check condition of batteries and replace if necessary .

Note: Low battery detection does not cause the table to stop moving. The warnings can only be cleared by switching the table ‘off’ at the base and then ‘on’ again. Code 02 stops all table movements except Trendelenburg.

3 Code 03 is displayed and One of the base cover pressure Remove object from base cover.

a fast repeated audible warning switches has operated. is given from the base and the table will not mov e when any motion is selected.

4 Code 03 is displayed and One of the base cover pressure Remove object from base cover.

a fast repeated audible warning switches has been operated. If is given from the base when the the hand control button remains table is moving from the castor pressed when the condition occurs, position to the brake position. the table will stop for two seconds,

reverse its movement for 1.5 seconds and then stop.

5 Code 04 is displayed and Tilt switch has Press opposite button, e.g.

Table will not move when Trend, operated. Reverse Trend instead of Trend reverse Trend, Break Up or or, Break Up instead of Break . Break Down buttons are pressed. Down.

6 Code 04 is displayed and Tilt switch has operated Press opposite button, e.g.

Table mov ement stops when to limit movement of table top. Reverse Trend instead of Trend or moving to Trend or Break Break Up instead of Break Down. Down positions.

(Continued)

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TABLE 1 - FAULT DIAGNOSIS

Fault/Condition Possible Cause Remedy

7 Code 05 is displayed and The applicable table motion Switch the table ‘off’, using

an LED is illuminated (see below),has been used for more than the table on/off switch, (Fig.1 the Table stops moving and there 40 seconds (consider whether item 18), and then switch back ‘on’. is a continuous audible warning a button has been accidentally given. depressed and held down).

Button Pushed LED illum’d.

Trend (3 or 4) Patient (L) - (1) Break (5 or 6) Patient (R) - (2) Hand control membrane Engineer to check Hand control. Lat’l Tilt (7 or 8) Brake - (13) faulty and making contact Height (9 or 10) Height - (10) without being touched. Castor (12) Castor - (12) Auto level (11) Auto level - (11)

8 Code 06 is displayed and Table duty cycle has been Wait for sufficient time to allow

Table stops moving. exceeded (2 minutes on duty cycle protection circuit to

in 8 minutes). re-enable. Note: With this condition, movement of the table top to the full Trendelenburg position (orange hand control button 3 Fig. 4) is still possible.

9 Code 07 is displayed and A hydraulic solenoid has Engineer to identify and replace

Ta ble stops moving, and there gone open or short-circuit. the faulty hydraulic solenoid. is a continuous audible warning given.

10Code 08 is displayed. Height Up button is pressed Warnings will stop when Height Up

when table is not on its feet. button is released. Press Brake

button (13) then Height up (9).

11Code 09 is displayed. Castor button is pressed with Warnings will stop when Castor

table above minimum height. button is released. Press Height

Down button (10) until minimum height then Castor button (12).

12Code 10 is displayed and Footswitch unit not connected. Connect footswitch unit.

footswitch cannot be selected by pressing ‘footswitch’ button (see Fig. 4 item 14) on the hand control.

(Continued)

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TABLE 1 - FAULT DIAGNOSIS

Fault/Condition Possible Cause Remedy

13Code 10 is displayed and The footswitch system has Re-select footswitch by pressing

footswitch LED flashes failed. footswitch select button and re-try. (see Fig. 4 item 14) and table stops moving, If fault repeats, engineer to check

connections and, if necessary, replace footswitch.

14A single audible warning is given Height down button is pressed Warnings will stop when

from the hand control and the when table is already at appropriate hand control button table will not mov e minimum height. is released.

15Red emergency stop LED The ‘emergency stop’ button To reset ‘emergency

continuously illuminated has been pressed stop’, switch table ‘off’ accompanied by a continuous and then ‘on’ again. audible warning sound from the base and an intermittent warning sound from the hand control.

16Table will not mo ve and main The serial communication link Reconnect hand control or

control board audible warning between the main control board engineer to locate and repair sounds. and the hand control has failed, broken wire.

e.g. because of a broken wire or Try different handset socket, if the hand control becoming problem solved engineer to inspect disconnected. faulty socket.

17Table will not move. End door (short trunk Close door or operate

section end) is open. door microswitch.

CIRCUIT DIAGRAM INDEX

Drawing No. Title Fig. No. Page No.

699501 Base distribution board 27 35 699569 Opto board 28 35 699497 Top-of-column solenoid board 29 36 699755 Pin connections 30 36 700303 Tilt opto board 31 36 699495 Top-of-column distribution board 32 37 699980 Battery charger distr ibution board 33 38 699819 RX500 Main control board 34 39 699364 RX500 System diagram 35 40

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1. Patient orientation button and green indicator.

2. Patient orientation button and green indicator.

3. Trendelenburg button (orange).

4. Reverse Trendelenburg button.

5. Break (Extension) button.

6. Break (Flexion) button.

7. Lateral tilt button.

8. Lateral tilt button.

9. Table raising button.

10. T ab le lowering button.

11. Return to pre-set (auto level) position button.

12. Castor button and yellow indicator.

13. Brake b utton and yellow indicator.

14. Footswitch control button and yellow indicator.

15. Display panel for two digit code .

16. Emergency stop button and red indicator.

Fig. 27 Hand control functions

TABLE 2 : CODES FOR 2-DIGIT DISPLAY

CODE CAUSE REMEDY

01 Battery voltage low. Recharge batteries as soon as possible. 02 Battery voltage critically low . Recharge batteries immediately . 03 Base cover s witch operated. Remove pressure or weight from co v er. 04 Maximum Break or Trendelenburg achieved. Select reverse of function. 05 Button pressed for ov er 40 seconds. Switch table ‘off’ then ‘on’ with s witch 18. 06 Tab le duty cycle (2 min. in 8) e xceeded. Allow time f or auto reset. 07 Hydraulic solenoid failure. Call engineer . 08 09 Castor button pressed with table raised. Lower tab le fully with button (10). 10 Footswitch selected without F ootswitch. Connect foots witch.

10+LED Footswitch system failure. Retry and/or call engineer.

Height Up button pressed with table on castors.

See Table 1 for more details of the codes and remedies.

Brake table with button (13).

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Fig. 28 Base Distribution Board

Fig. 29 Opto Board

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Fig. 30 Top-Of-Column Solenoid Board

Fig. 31 Pin Connections

Fig. 32 Tilt opto board

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Fig. 33 Top-Of-Column Distribution Board

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Fig. 34 Battery Charger Distribution Board

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Eschmann Equipment, Peter Road, Lancing, West Sussex, BN15 8TJ, England.

Tel: +44 (0) 1903 753322. Fax: +44 (0) 1903 766793. www.eschmann.co.uk