Midmark 304 Service manual

-001

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Style B

thru

304

-021

Examination Ta ble

Service and

Serial Number Prefixes: GJ, GK, GL, JE, JF, JG JH, KV, KW, KX, KZ, LC & V

Parts Manual

NO LONGER IN PRODUCTION

Some service parts may not

be available for this product-

(Monitor Arm on 304-017 Integrated Patient Exam Table [IPET] Only)

FOR USE BY MIDMARK TRAINED TECHNICIANS ONLY

304

-001 thru

-021

SF-1532 Part No. 004-0044-00 Rev. M (03/18/08)

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TABLE OF CONTENTS

Section/Paragraph................................................Page Section/Paragraph ............................................... Page

IMPORTANT INSTRUCTIONS

General Safety Instructions ...........................................ii

Safety Alert Symbols .....................................................ii

Warranty Instructions .................................................. ii

SECTION I GENERAL INFORMATION

1.1 Description Of 304 Exam Table.................... 1-1

1.2 Specifications ............................................... 1-3

1.3 Parts Replacement Ordering........................ 1-5

1.4 Special Tools ................................................ 1-6

SECTION II TESTING AND TROUBLESHOOTING

2.1 Operational Test (See Figure 2-1) ................ 2-1

2.2 Troubleshooting Procedures......................... 2-3

SECTION III SCHEDULED MAINTENANCE

3.1 Scheduled Maintenance ............................. 3-1

SECTION IV MAINTENANCE/SERVICE INSTRUCTIONS

4.1 Introduction................................................... 4-1

4.2 Styled Upholstery Removal /

Installation ................................................ 4-1

4.3 Soft Touch Upholstery

Removal / Installation ............................... 4-2

4.4 Footrest Extension Removal /

Installation ................................................. 4-4

4.5 Step Assembly Removal /

Installation ................................................. 4-5

4.6 Back Lock Assembly Removal /

Installation ................................................. 4-7

4.7 Lift Lever Removal / Installation.................... 4-9

4.8 Heater ON / OFF Switch

Removal / Installation .............................. 4-11

4.9 Heater Plate Removal /

Installation ............................................... 4-12

4.10 Stirrup Components Removal /

Installation ............................................... 4-13

4.11 Electrical Receptacle Removal /

Installation (120 VAC units)..................... 4-14

4.12 Typical Electrical Receptacle Removal /

Installation (220 VAC units)..................... 4-16

4.13 Fuse Removal / Installation

(220 VAC units) ....................................... 4-18

4.14 AC Inlet Removal / Installation

(220 VAC units) ....................................... 4-19

Model 304-017 Maintenance / Service Instructions Only

4.15 Accessing Electrical Components.............. 4-20

4.16 Fuse Holders.............................................. 4-21

4.17 Transformers .............................................. 4-21

4.18 Power Strips............................................... 4-22

SECTION V SCHEMATICS AND DIAGRAMS

5.1 Electrical Schematics /

Wiring Diagrams ..................................... 5-1

SECTION VI PARTS LIST

6.1 Introduction ................................................ 6-1

6.2 Description Of Columns ............................... 6-1

6.3 Torque Specifications And Important

Assembly Notes........................................ 6-1

Pictorial Index ............................................ 6-2.*

Table Top Components

(Vacu-Form upholstery) .......................... 6-3.*

Table Top Components

(Soft Touch upholstery)............................. 6-4

Upperwrap Components ............................ 6-5.*

Stirrup Components ................................... 6-6.*

Cabinet Components

(120 VAC units) ......................................... 6-7

Cabinet Components

(220 VAC units) ......................................... 6-8

Step Assembly ............................................. 6-9

Electrical Components

(120 VAC units) ..................................... 6-10.*

Electrical Components

(220 VAC units) ..................................... 6-11.*

Receptacle Assembly

(220 VAC units) ....................................... 6-12

IPET Components...................................... 6-13

IPET Monitor Arm assembly ...................... 6-14

COMMENTS ............................................................. 7-1

FAX ORDER FORM.................................................. 7-2

(*) Indicates that there has been a serial number break for the illustration

and that there are additional point page(s) following the original page.

Rev. 9/04

TABLE OF CONTENTS

Return To Table Of Contents

General Safety Instructions

Safety First: The primary concern of Midmark Corporation is that this table is maintained with the safety

of the patient and staff in mind. To assure that services and repairs are completed safely and correctly, proceed as follows:

(1) Read this entire manual before performing any

services or repairs on this table.

(2) Be sure you understand the instructions con-

tained in this manual before attempting to service or repair this table.

Safety Alert Symbols

Throughout this manual are safety alert symbols that call attention to particular procedures. These items are

used as follows:

DANGER

A DANGER is used for an imminently

hazardous operating procedure, practice, or condition which, if not correctly followed, will result in loss of life or serious personal injury.

NOTE

A NOTE is used to amplify an operating procedure, practice or condition.

Warranty Instructions

Refer to the Midmark “Limited Warranty” printed in the Installation and Operation Manual for warranty information. Failure to follow the guidelines listed below will void the warranty and/or render the 304 Medical Examination Table unsafe for operation.

• In the event of a malfunction, do not attempt to use the examination table until necessary repairs have been made.

• Do not attempt to disassemble table, replace malfunctioning or damaged components, or perform adjustments unless you are one of Midmark’s authorized service technicians.

• Do not substitute parts of another manufacturer when replacing inoperative or damaged components. Use only Midmark replacement parts.

WARNING

A WARNING is used for a potentially

hazardous operating procedure, practice, or condition which, if not correctly followed, could result in loss of life or serious personal injury.

CAUTION

A CAUTION is used for a potentially haz-

ardous operating procedure, practice, or condition which, if not correctly followed, could result in minor or moderate injury. It may also be used to alert against unsafe practices.

EQUIPMENT ALERT

An EQUIPMENT ALERT is used for an

imminently or potentially hazardous operating procedure, practice, or condition which, if not correctly followed, will or could result in serious, moderate, or minor damage to unit.

Rev. 7/04

SECTION I

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GENERAL INFORMATION

SECTION I

GENERAL INFORMATION

1.1 Description Of Model 304 Medical Examination Table

A. General Description (See Figure 1-1).

The Model 304 -001 thru -004 & -007 thru -014 Medical Examination Table is primarily used in examination rooms for general examinations and minor procedures. The table top is adjustable from a full horizontal position to a chair position. Also, when supported with an optional pelvic lift bar, the lithotomy position can be achieved. Listed below are the models currently available:

304 (-001 thru -004 &

-007 thru -014)................................ 120 VAC units

304 (-018 thru -021 Canadian) .............................. N/ A

304 (-005, -006, -015, -016) .................... 220 VAC units

The components of the table are: the drawer heater plate (optional) (1, Figure 1-1), heater ON / OFF switch (optional), electrical receptacle, back lock assembly, lift assembly, step assembly, and two stirrup assemblies.

304 (-017)................................................ 120 VAC units

The Model 304 -017 Intergrated Patient Exam Table is primarily used in examination rooms for general examinations and minor procedures. It also provides an organized means by which a PC, and PC-based instruments can be placed nearer to the patient for more efficient use by the practitioner. It has a magnetic drawer front on the side at the headend of the table. When removed, a storage area for a PC or other electronic monitor equipment is accessible. The monitor arm, provides support for a PC keyboard, flat screen monitor or other similar equipment. Two power strips, each containing six outlets, are located on the head-end, inside the table frame, behind the drawers. Two Isolation Transformers are located beneath the base cover, below the drawers, on the head-end of the table. The 304-017 also contains the back lock and lift assemblies, stirrups, and step assembly same as the other 304 models. It does not exterior electrical receptacle.

contain a drawer heater and on/off switch, or

Model 304-001 thru -004 & -007 thru -014 Theory of Operation (120 VAC Units)

(See Section 5 for wiring diagram / electrical schematic)

Line voltage (120 VAC) is supplied thru the power cord to electrical receptacles located on the side of the table. As long as the power cord is plugged into a supply outlet, 120 VAC power will be present at the receptacles.

Models 304-018 thru -021 Has pelvic tilt options but no receptacles nor drawer heaters.

Model 304-005, 006, -015, -016 Theory of Operation (220 VAC Units)

(See Section 5 for wiring diagram / electrical schematic)

Line voltage (220 VAC) is supplied thru the power cord to the AC inlet located on the base of the table. From the AC inlet, voltage is supplied to the receptacle located on the side of the table. As long as the power cord is plugged into a supply outlet, 220 VAC power will be present at the receptacle.

Optional Heater Plate:

Some units are equipped with an optional heater plate for drawer warming. When the operator turns the heater ON / OFF switch to ON, closing the circuit, power is supplied to the heater plate, heating the unit. This provides heat in the top, foot end drawer to warm instruments.

Model 304-017 Theory of Operation (120 VAC Unit)

(See Section 5 for wiring diagram / electrical schematic)

Line voltage (120 VAC) is supplied thru the power cord and four fuses to the two isolation transformers. The transformers have 120 VAC input and output and are used to maintain a level voltage two power strips. Each power strip, located on the head-end behind the drawers, has six outlets to supply 120 VAC to accessories. The maximum load on each power strip cannot exceed 5 amps.

(120 VAC) supply to the

Rev. 5/05

SECTION I

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GENERAL INFORMATION

* Not Provided on Models

304-017 thru -021

Heater On/Off Switch

Drawer Heater Plate

Lift

Assembly

Circuit Breakers 304-018 thru -021

Stirrup

Back Lock Assembly

Head End

Monitor

Arm

304-017

Assembly

Magnetic Drawer Front

Step

Power Strips (2)

Exterior Electrical Receptacle

MA661202i

MA356102i

Rev.1/05

Figure 1-1. Major Components

SECTION I

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GENERAL INFORMATION

1.2 Specifications

Table 1-2. Specifications

Description Data

Weight of a Unit (304-001 thru -004 & -007 thru -014, & -018 thru -021):

Without Shipping Carton ................. 250 lbs (113.4 kg)

With Shipping Carton ......................... 300 lbs (136 kg)

Weight of a Unit (304-017):

Without Shipping Carton ................. 400 lbs (181.4 kg)

With Shipping Carton ...................... 450 lbs (204.1 kg)

Shipping Carton: ...60.5 in. "L" x 30 in. "W" x 42 in. "H"

(153.7 cm x 76.2 cm x 106.7 cm)

Dimensions (See Figures 1-2 & 1-3).

Weight Capacity (Maximum) ............ 325 lbs. (147.4 kg)

Electrical Requirements:

304(-001, -002, -007, -008,................... 110-120 VAC,

60 HZ, 6.0 amp, single phase

304(-003, -004, -009, -010)................... 110-120 VAC,

60 HZ, 6.5 amp, single phase

304(-005, -006, -0 15, -016)................... 220- 240 VAC,

50/60 HZ, 5 amp, single phase

304(-017) .............................................. 110-120 VAC,

60 HZ, 12.0 amp, single phase

Fuse Rating:

304(-005, -006, -015, -016)............ 6.3 amp, 250 VAC

5 x 20mm “Slo-Blo”

304 (-017) (F1, F2, F3, F4) ............ 6.3 amp, 250 VAC

5 x 20mm “Slo-Blo”

Rev. 1/05

Figure 1-2.Dimensions

304-001 thru -010 304-015 thru -016

304-017 304-018 thru -021

*(See Fig. 1-3 for Monitor Arm)

SECTION I

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GENERAL INFORMATION

61"

62-3/4"

55-1/4"

Head End

304-017 Monitor Arm Assembly

For Table Dimensions

refer to Figure 1-2.

Same Arm Swing as shown on Opposite Side

19-1/2"

27-1/2"

37-1/4"

49-1/4"

Head End

43"

7-1/2"

37-1/2"

9"x18"

Rev. 1/05

30 lbs.

Max. Load

Figure 1-3. Dimensions

MA662201i

SECTION I

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GENERAL INFORMATION

1.3 Parts Replacement Ordering

If a replacement part is required, order the part directly from the factory as follows:

(1) Refer to Figure 1-4 to determine the location

of the model number and serial number of the table and record this data.

(2) Refer to the Parts List to determine the item

numbers of the parts, part numbers of the parts, descriptions of the parts, and quantities of parts needed and record this data (Refer to para 6.1)

NOTE

Ask the Purchasing Department of the company that owns the table for this information. Otherwise, this information may be obtained from the dealer that sold the table.

(3) Determine the installation date of the table and

record this data.Call Midmark with the recorded information and ask for the Medical Products Technical Services Department. See back cover of this manual for the phone number or use the Fax Order Form (See page 7-2 for Fax Order Form).

Model & Serial Numbers are required when ordering parts.

MODEL NUMBER SERIAL NUMBER

Rev. 1/05

Figure 1-4. Model Number / Serial Number Location

SECTION I

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GENERAL INFORMATION

1.4 Special Tools

the table, how to obtain the special tools, and the purpose of each special tool.

Table 1-3 lists all of the special tools needed to repair

Table 1-3. Special Tool List

Description of Special Tool

Multimeter Commercially Available Any Type Used to perform continuity and voltage checks.

Pop Rivet Gun Commercially Available For installation of 1/8 in.

Torque Wrench Commercially Available Any Type Used to tighten nuts or screws to specified values.

Manufacturer’s

Name / Address / Phone

Manufacturer’s

Part Number

pop rivets.

Purpose of Special Tool

For installation of drawer slides and mullions.

Rev. 1/05

TESTING AND TROUBLESHOOTING

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SECTION II

TESTING AND TROUBLESHOOTING

SECTION II

2.1 Operational Test (See Figure 2-1)

In order to effectively diagnose a malfunction of the table, it may be necessary to perform an operational

test as follows:

WARNING

Refer to the Operator Manual for com-

plete instructions on operating the examination table. Failure to do so could result in personal injury.

NOTE

The Operational Test, for the most part, only describes what should happen when the table is operated. If the table does something other than described, a problem has been discovered. Refer to the Troubleshooting Guide to determine the cause of the problem and its correction.

(1) Plug the table power cord into a grounded, non-

isolated, correctly polarized outlet, that has the proper voltage for the table.

(2) Using a multimeter, check for proper voltage at

the table’s electrical receptacle (1).

(5) Lift up on the head board assembly (4) stopping

at several positions.

Observe.

raise smoothly. The back support rod and lock assembly should hold the head board firmly at all positions without slipping. The head board should be able to be raised to 80°

The head board assembly (4) should

NOTE

The head board assembly should hold firmly with a 200 lb. (90.7 kg) load applied to the head end of the table.

(6) Apply pressure to the head board assembly (4)

to check for drifting. Then press down on one of the back lock handles (5) while pressing down on the head board assembly and lower the head board all the way down.

Observe.

drift when pressure is applied to head board assembly. The back lock rod assembly should retract smoothly without binding when back lock handles are depressed. The head board assembly should be able to be lowered to a horizontal position.

The back lock assembly should not

Observe. For 304 (-001 thru -004 &

-007 thru -014):

present at the receptacle.

-015, -016):

at the receptacle.

(3) If the unit has the optional heater, turn the

heater ON / OFF switch (2) to ON.

Observe.

should illuminate and the heater plate should begin to warm the top drawer at the foot end of the table (9).

Turn the heater ON / OFF switch (2) to OFF.

(4) Pull footrest assembly (3) out all the way.

Observe.

easily. The footrest assembly should hit stops at the end of its travel, preventing accidental removal

There should be 120 VAC

For 304 (-005, -006,

There should be 220 VAC present

The heater ON / OFF switch (2)

The footrest assembly should extend

(7) On units with the optional pelvic tilt, lift up on

the seat section (6) slightly.

Observe.

matically raise up into its locked position, supporting the seat section in the pelvic lift position (+5° above horizontal).

To lower the seat section (6) to standard position, raise up slightly on seat section; then grasp the pelvic lift bar (7) and rotate it downward while lowering the seat section.

(8) Extend the stirrups (8); then lift up on the end of

each stirrup and move them laterally. Let the stirrups lock into each of the four positions. While applying downward pressure, attempt to move each stirrup to the left and to the right. .

The pelvic lift bar (7) should auto-

Rev. 12/98

Page 2-1

Printed in U.S.A.

SECTION II

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TESTING AND TROUBLESHOOTING

Figure 2-1. Operational Test

Observe.

easily and move freely from left to right when raised. The stirrups should lock into each of the four positions and should not move laterally as long as downward pressure is applied.

(9) Check operation of each drawer (9).

The stirrups (8) should slide out

(10) Check operation of step (10).

Observe.

The step should drop into locked position when it is fully extended and should not pull out of the table.

The step (10) should pull out easily.

MA380600

Observe.

All drawer rollers should move freely in the drawer tracks.

The drawers should slide out easily.

Rev. 12/98

Page 2-2

Printed in U.S.A.

SECTION II

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TESTING AND TROUBLESHOOTING

2.2 Troubleshooting Procedures

Table 2-1 is a Troubleshooting Guide which is used to

Problem Symptom Probable Cause Check Correction

Drawer warmer is not working. Power is present at the supply outlet.

(Not an option on 304-017)

Electrical receptacle is not working.

(Not an option on 304-017)

Electrical receptacle or optional drawer warmer not working.

(Not an option on 304-017)

Heater plate assembly does not warm up when heater ON / OFF switch is turned ON.

Table power cord is plugged into wall outlet and power is present, but there is still no power at electrical receptacle.

No power is available at electrical receptacle and heater ON / OFF switch does not illuminate when pressed.

Heater ON / OFF switch is malfunctioning.

Heater plate assembly is malfunctioning

Wire connections are loose. Check all wiring connec-

Circuit Breaker(s) tripped. (Models 304-018 thru -021)

Electrical receptacle is malfunctioning.

Wire connections are loose. Check all wiring connec-

Line fuse(s) blown (applies to 220 VAC units only).

AC inlet is malfunctioning (applies to 220 VAC units only).

Power cord is not plugged into facility wall outlet.

Facility circuit breaker providing power to table is tripped / blown.

determine the cause of the malfunction.

When heater ON / OFF switch is turned to ON, heater switch should illuminate (this indicates that there is power present at output terminals of switch).

Replace suspect heater plate assembly with known working heater plate assembly or check for continuity thru heater plate assembly wires.

tions from power heater ON / OFF switch to heater plate assembly. Perform continuity check on wires. Use multimeter to check for proper voltage levels.

Check if Circuit Breaker(s) is tripped.

Replace suspect electrical receptacle with known working receptacle.

tions from power cord to electrical receptacle. Perform continuity check on wires. Use multimeter to check for proper voltage levels.

Perform continuity check on fuses.

Replace suspect AC inlet with known working AC inlet.

Check to see if power cord is plugged in.

Check to see if facility circuit breaker is tripped / blown. One way of checking this is to plug a lamp into wall outlet that table was plugged into.

If heater ON / OFF switch does not illuminate when turned ON, replace heater switch. Refer to para 4.8.

Replace heater plate assembly. Refer to para 4.9.

Clean any dirty connections. Tighten any loose connections. Replace any damaged connections. Refer to para

5.1.

Reset Circuit Breaker(s)

Replace electrical receptacle. 120 VAC Units: Refer to para

4.11. 220 VAC Units: Refer to para 4.12.

Clean any dirty connections. Tighten any loose connections. Replace any damaged connections. Refer to para

5.1.

Replace fuse(s). Refer to para

4.13.

Replace AC inlet. Refer to para 4.14.

Plug power cord into facility wall outlet.

If circuit breaker is tripped, determine what caused circuit breaker to trip, correct the problem, and then reset / replace circuit breaker.

Rev. 9/04

Problem Symptom Probable Cause Check Correction

Return To Table Of Contents

Electrical receptacle or optional drawer warmer not working. -Continued

Head Board Assembly does not operate correctly.

Step assembly does not function correctly.

No power is available at electrical receptacle and heater ON / OFF switch does not illuminate when pressed. -Continued

Head Board will not stay in position, drifts down.

Headboard will not stay in position, drifts down (continued).

Head Board will not descend when back lock handle(s) are depressed.

Head Board descends rapidly when back lock handles are depressed.

Head Board descends rapidly when back lock handles are depressed (continued).

Step assembly difficult to pull out.

TESTING AND TROUBLESHOOTING

Wire connections are loose. Check all wiring connec-

Line fuse(s) blown (applies to 220 VAC units only).

AC inlet is malfunctioning (applies to 220 VAC units only).

Springs on back lock assembly have broken or come loose.

The hole in the back lock assembly for the back support rod has worn or elongated.

The back support rod has worn excessively and will not hold in he back lock assembly.

Back lock springs are disconnected or broken.

Back support rod out of alignment causing the rod to bind in the back lock assembly.

Set screws that secure the back lock assembly to the back lock rod are loose or missing.

Set screw(s) are loose in the back lock handle(s) prevent handles from rotating back lock rod and back lock assembly.

Lift spring(s) are broken or disconnected from the lift lever or the eye bolt(s).

Lift spring(s) tension out of adjustment.

Lift support rod for the lift lever is disconnected.

Nylon stem bumpers worn or missing. Lack of lubrication.

tions from power cord to electrical receptacle and heater ON / OFF switch. Perform continuity check on wires. Use multimeter to check for proper voltage levels.

Perform continuity check on fuses.

Replace suspect AC inlet with known working AC inlet.

Check condition of the back lock springs.

Check the condition of the back lock assembly for excessive wear.

Check for excessive wear on the back support rod.

Inspect the back lock springs.

Check the alignment of the back support rod and insure the screws are tight on the back support plate or bracket.

Check the set screws to insure they are in place and tightened to the back lock rod.

Check the condition of the lift spring(s).

Check the position of the wing nuts to insure they are on the eye bolts sufficiently.

Check the condition of the lift support rod to insure it is in place.

Check the condition of the nylon stem bumpers.

SECTION II

Clean any dirty connections. Tighten any loose connections. Replace any damaged connections. Refer to para

5.1.

Replace fuse(s). Refer to para

4.13).

Replace AC inlet. Refer to para 4.14.

Replace the springs on the back lock assembly. Refer to para 4.6.

Replace the back lock assembly. Refer to para 4.6.

Replace the back support rod. Refer to para 4.6.

Connect and / or replace the back lock springs. Refer to para 4.6.

Re-align the back support rod plate or bracket and tighten the mounting screws. Refer to para 4.6.

Install and / or tighten the set screws in the back lock assembly. Refer to para 4.6.

Install and / or tighten the set screws in the back lock handles. Refer to para 4.6.

Reconnect or replace the lift springs. Refer to para 4.7.

Adjust the spring tension on the lift springs. Refer to para

4.7.

Repair or replace the lift support rod. Refer to para 4.7.

Replace and lubricate the nylon stem bumpers. Refer to para 4.5.

Rev. 12/98

Page 2-4

Printed in U.S.A.

Problem Symptom Probable Cause Check Correction

Return To Table Of Contents

Step assembly does not function correctly.

-Continued

Step assembly pulls completely out of table when fully extended.

TESTING AND TROUBLESHOOTING

Step stop missing or out of alignment.

Check the condition of the step stop.

SECTION II

Repair or replace the step stop. Refer to para 4.5.

Drawer(s) do not function correctly.

Pelvic tilt does not function correctly.

Footrest assembly does not function correctly.

Stirrups do not work correctly.

Step will not lock into position when fully extended.

Drawer(s) difficult to slide in and out of the table.

Pelvic tilt lift bar does not spring to “Up” position when the seat section is lifted.

Footrest does not extend or retract smoothly.

Footrest pulls all the way out when fully extended.

Stirrups do not lock into one of four lateral positions.

Lock tabs on bottom rails of step weldment are not bent down far enough.

Drawer(s) not located properly in the cabinet slides.

Drawer and / or cabinet slide is damaged.

Ball bearings in cabinet slides dry of lubricant or contaminated with foreign debris.

Pivot points on pelvic lift bar dry of lubricant and / or dirty.

Springs on the pelvic tilt bar are broken.

Push nuts that retain pelvic lift bar on tabs of upper weldment rubbing on bar.

The nylo tape in the footrest cabinet guides is missing or dry of lubricant.

The footrest weldment is bent or damaged.

The “stop” tabs at the back of the footrest weldment are not bent down correctly.

Stirrups dirty and lacking lubricant.

Check if lock tabs on bottom rails of step weldment are bent down.

Check to insure the drawer slide is located properly in the cabinet slide.

Check the condition of the slides on the drawer(s) and cabinet.

Check the ball bearings and cabinet slides.

Check the condition of the pivot points on the pelvic lift bar.

Check the condition of the springs on the pelvic tilt bar.

Check the position of the push nuts in relation to the pelvic lift bar.

Check the condition of the nylo tape.

Inspect the footrest weldment to insure it is straight.

Inspect the footrest weldment to insure the tabs are bent down and that the rubber bumpers are in place on the footrest cabinet guides.

Inspect the stirrup assemblies for dirt and lack of lubricant.

Bend the lock tabs down approximately 1/8 inch (0.32 cm) from the bottom of the step weldment rails. Refer to para 4.5.

Insert the drawer slide properly in the cabinet slide.

Replace the cabinet slide(s) and / or drawer assemblies.

Clean, lubricate or replace the cabinet slide(s).

Clean and lubricate the pivot points on the pelvic lift bar.

Replace the springs on the pelvic tilt bar.

Repair or replace the push nuts.

Lubricate and / or replace the nylon tape in the cabinet guides. Refer to para 4.4.

Replace the footrest weldment. Refer to para 4.4.

Repair or replace the footrest. Refer to para 4.4.

Clean and lubricate the stirrup assemblies.

Rev. 12/98

Page 2-5

Printed in U.S.A.

SECTION II

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TESTING AND TROUBLESHOOTING

Rev. 12/98

Page 2-6

Printed in U.S.A.

SCHEDULED MAINTENANCE

Return To Table Of Contents

SECTION III

SCHEDULED MAINTENANCE

SECTION III

3.1 Scheduled Maintenance

periodically on the 304 Examination Table. These inspections and services should be performed as often

Table 3-1 is a Scheduled Maintenance Chart which lists

as indicated in the chart.

the inspections and services that should be performed

Interval Inspection or Service What to Do

Semi-annually Obvious damage Visually check condition of table for obvious damage such as: cracks in components, missing com-

Fasteners / hardware Check table for missing or loose fasteners / hardware. Replace any missing hardware and tighten

Warning and instructional decals

Pivot points / moving parts / accessories

Step Assembly Check step assembly to insure that it slides in and out easily. Insure that the step assembly locks in

Footrest extension Check that footrest extension can be easily extended and is not damaged. Refer to para 4.3.

Stirrup assemblies Check that stirrup assemblies lock into one of four different positions. Check for wear. Replace

Electrical receptacle Check that the electrical receptacle are functioning properly. Replace receptacle as necessary.

Drawer Heater (Optional) Where applicable, check to insure the drawer heater is heating sufficiently to warm the top drawer

Pelvic Tilt (Optional) Check that the spring loaded pelvic tilt is operating properly. Replace springs if necessary.

Upholstery Check all upholstery for rips, tears, or excessive wear. Replace cushions as necessary.

Accessories Check that all accessories have all of their components and that they function properly. If neces-

Operational Test Perform an Operational Test to determine if the table is operating within its specifications (Refer to

ponents, dents in components, or any other visible damage which would cause the table to be unsafe to operate or would compromise its performance. Repair table as necessary.

any loose hardware as necessary.

Check for missing or illegible decals. Replace decals as necessary.

Lubricate all exposed pivot points, moving parts, and accessories with silicone based lubricant.

place when extended. Refer to para 4.4.

worn components as necessary. Refer to para 4.14.

Refer to para 4.9.

and that the heater ON / OFF switch indicator light illuminates when the switch is in the ON position. If necessary, replace the heater switch or heater plate. Refer to para 4.7 or 4.8.

sary, repair or replace the accessory.

para 2.1). Replace or adjust any malfunctioning components.

Page 3-1

Printed in U.S.A.

SECTION III

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SCHEDULED MAINTENANCE

Page 3-2

Printed in U.S.A.

MAINTENANCE / SERVICE

Return To Table Of Contents

SECTION IV

MAINTENANCE / SERVICE INSTRUCTIONS

SECTION IV

4.1 Introduction

WARNING

Refer to the Operator Manual for com-

plete instructions on operating the examination table. Failure to do so could result in personal injury.

NOTE

Perform an operational test on the examination table after the repair is completed to confirm the repair was properly made and that all malfunctions were repaired.

4.2 Styled Upholstery

A. Removal

WARNING

Always disconnect electrical power to

the unit before removing any of the unit's covers/shrouds or making any repairs to prevent the possibility of electrical shock. Failure to comply could result in personal injury.

(5) Remove the upholstered top assembly (6).

(6) Extend the footrest and remove the upholstered

footrest pad (7).

B. Installation

CAUTION

Use care when installing the upholstered

top assembly as it weighs approximately 32 lbs. (14.5 kg). Failure to use proper lifting techniques or assistance could result in personal injury.

(1) Lay the new upholstery assembly (6, Figure

4-1) in position on the back plate assembly (5) and upper wrap assembly (8).

(2) Secure the head section (C) to the back plate

assembly (5) with four screws (4).

(3) Secure the seat section (A) to the top hinge (3)

with two screws (2).

(4) For tables without Pelvic Tilt, install the two

screws (1) that secure the seat section (A) to the upper wrap cross member (B).

(1) Unplug the table power cord from the wall out-

let.

(2) For tables without Pelvic Tilt, remove the two

screws (1, Figure 4-1) that secure the seat section (A) to the upper wrap cross member (B).

(3) Remove the two screws (2) that secure the

upholstered seat section (A) to the top hinge (3).

(4) Elevate and support the head section (C) and

remove the four screws (4) that secure the upholstered head section (C) to the back plate assembly (5).

CAUTION

Use care when removing the upholstered

top assembly as it weighs approximately 32 lbs. (14.5 kg). Failure to use proper lifting techniques or assistance could result in personal injury.

(5) Raise and lower the head section (C) several

times to insure it operates smoothly and locks in position without drifting. If necessary, refer to Testing and Troubleshooting, para 2.1.

(6) Install the upholstered footrest pad (7).

(7) Plug the table power cord into a wall outlet.

Rev. 7/04

SECTION IV

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MAINTENANCE / SERVICE

Figure 4-1. Styled Upholstery

4.3 Soft Touch Upholstery

A. Removal

WARNING

Always disconnect electrical power to

the unit before removing any of the unit's covers/shrouds or making any repairs to prevent the possibility of electrical shock. Failure to comply could result in personal injury.

(1) Unplug the table power cord from the wall

outlet.

MA376600

(3) Elevate and support the head section (C) and

remove the two screws (2) securing the rod support bracket (3) to the head section (C).

(4) Lay the head section (C) forward and remove

four screws (4) securing the upholstered top assembly (5) to upper wrap (6).

CAUTION

Use care when removing the upholstered

top assembly as it weighs approximately 32 lbs. (14.5 kg). Failure to use proper lifting techniques or assistance could result in personal injury.

(2) For tables without Pelvic Tilt, remove the two

screws (1, Figure 4-2) that secure the seat section (A) to the upper wrap cross member (B).

Rev. 7/04

(5) Remove the upholstered top assembly (5).

(6) Extend the footrest shelf (7) and remove the

upholstered footrest pad (8).

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SECTION IV

MAINTENANCE / SERVICE

Figure 4-2. Soft Touch Upholstery

B. Installation

CAUTION

Use care when installing the upholstered

top assembly as it weighs approximately 32 lbs. (14.5 kg). Failure to use proper lifting techniques or assistance could result in personal injury.

(1) Lay the new upholstery assembly (5,

Figure 4-2) in position on the upper wrap assembly (6) and secure with four screws (4).

MA485200

(2) Lay the head section (C) backward slightly and

secure to rod support bracket (3) with two screws (2).

(3) For tables without Pelvic Tilt, install the two

screws (1) that secure the seat section (A) to the upper wrap cross member (B).

(4) Raise and lower the head section (C) several

times to insure it operates smoothly and locks in position without drifting. If necessary, refer to Testing and Troubleshooting, para 2.1.

Rev. 7/04

SECTION IV

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MAINTENANCE / SERVICE

(5) Install the upholstered footrest pad (8) on foot

rest shelf (7).

(6) Plug the table power cord into a wall outlet

4.4 Footrest Extension

A. Removal

(1) Unplug table power cord from the wall outlet.

(2) Pull out the on the footrest (1, Figure 4-3) until it

is fully extended.

(3) Remove the upholstered footrest pad (2) and

treatment pan (3).

NOTE

For tables without Pelvic Tilt, remove the two screws (4) that secure the seat section (5) to the upper wrap cross member (A).

(4) Raise the seat section (5) and using pliers or

equivalent, bend up the two metal tabs (6) on the back of the footrest weldment (1) until they are horizontal.

(5) Pull the footrest weldment (1) out of the upper

wrap weldment (7).

B. Installation

NOTE

Before installing the footrest weldment, inspect the footrest runners (B, Figure 4-3) to insure the nylon tape glides (8) are in place at the side and top of each runner. Also inspect the rubber bumpers (9), located at the back of the footrest runners to insure they are intact.

(1) Inspect the nylon tape glides (8, Figure 4-3) and

rubber bumpers (9) and replace if necessary. Place a light coating of lubricant on the glides.

Rev. 7/04

MA364300

Figure 4-3. Footrest Extension

(2) Insert the footrest weldment (1) into the runners

Return To Table Of Contents

(B) of the upper wrap weldment (7) and bend the two metal tabs (6) on the footrest weldment downward until vertical.

(3) Install the treatment pan (3) and upholstered

footrest pad (2).

(4) Plug the table power cord into wall outlet.

4.5 Step Assembly

A. Removal

WARNING

Always disconnect electrical power to

the unit before removing any of the unit's covers/shrouds or making any repairs to prevent the possibility of electrical shock. Failure to comply could result in personal injury.

(1) Unplug the table power cord from the wall out-

let.

SECTION IV

MAINTENANCE / SERVICE

(2) Pull out on the step assembly (1, Figure 4-4)

until it is fully extended.

(3) While lightly pulling the step assembly outward,

reach beneath it and push the step stop (2) upward until it clears the base weldment (3); then remove the step assembly from the cabinet.

B. Drawer Front Replacement

NOTE

Should it be necessary to replace the plastic step front on the step assembly, the step covering must also be replaced as it is adhered to the step front.

(1) Remove the step covering (4, Figure 4-4) from

the step assembly (5).

(2) Reaching up through the opening at the bottom

of the drawer front (6), push out on the insert panel (7) and remove it.

(3) Remove the eight screws (8) that secure the

drawer front (6) to the step weldment (5) and remove the drawer front.

MA356500

Figure 4-4. Step Assembly

(4) Clean the surface of the step weldment (5), to

which the step covering (4) will be attached, with alcohol or a similar cleanser to insure the adhesive back will bond to the surface of the step weldment.

(5) Install the drawer front (6) to the step weld-

ment (5) and secure with eight screws (8).

NOTE

Before removing the protective cover from the adhesive backing of the step., lay the cover in place and make some light location marks to insure the step cover is installed uniformly on the step weldment.

Rev. 7/04

+ 53 hidden pages

Midmark 304 Service manual

Specifications and Main Features

Frequently Asked Questions

User Manual