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
contained 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 405 Medical
Examination Table unsafe for operation.
• In the event of a malfunction, do not attempt to
operate the 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
hazardous 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.
This manual contains detailed troubleshooting, scheduled maintenance, maintenance, and service instructions for the 405 Medical Examination Table. This
manual is intended to be used by Midmark’s authorized
service technicians.
1.2How to Use Manual
A. Manual Use When Performing Scheduled Mainte-
nance.
(1 ) Perform inspections and services listed in
Scheduled Maintenance Chart (Refer to
para 3.1).
(2) If a component is discovered to be faulty or out
of adjustment, replace or adjust component in
accordance with maintenance/service instructions (Refer to para 4.1).
B. Manual Use When Table Is Malfunctioning And
Cause Is Unknown.
(1 ) Perform an operational test on table (Refer to
para 2.1).
1.3Description of 405 Medical Examination Table
A. General Description (See Figure 1-1).
The 405 Medical Examination Table is an examination
table designed specifically for performing general
medical examinations and procedures.
The major serviceable components of the table are the
back capacitor, back actuator, base capacitor, base
actuator, base down limit switch, PC control board,
control disable switch, heater plate (optional), heater on/
off switch (optional), hand control assembly which
includes: hand control panel and hand control interface
board, a foot control (optional) which includes: four
footswitches (old style), six footswitches and PC board
(new style), and two stirrup assemblies. The following
components apply
transformer (DV1000 thru present), two hand control inlet
boards and two foot control inlet boards (LE1000,
LF1000 & LG100 thru present).
B. Theory of Operation (See Figures 5-1 thru 5-3 for
wiring diagrams / electrical schematics)
Electrical Power:
only
to the serial numbers listed:
(2 ) Perform troubleshooting procedures listed in
Troubleshooting Guide (Refer to para 2.2).
(3) If a component is discovered to be faulty or out
of adjustment, replace or adjust component in
accordance with maintenance/service instructions (Refer to para 4.1).
C. Manual Use When Damaged Component Is Known.
(1 ) Replace or adjust component in accordance
with maintenance/service instructions (Refer to
para 4.1).
Line voltage (for 115 VAC units and 230 VAC units) is
supplied directly to the table's PC control board. There
is a transformer and associated follow-on circuitry on the
PC control board which reduces the line voltage to 12
VDC. The 12 VDC provides power to operate the
circuitry on the PC control board, hand control, and foot
control (optional). The 100 VAC unit has an additional
transformer that steps up the voltage to 115 VAC before
it is supplied to the table's PC control board.
Line voltage is continuously supplied to the electrical
receptacle of 115 VAC and 230 VAC units. 100 VAC
units do not have electrical receptacles.
There is a normally closed (N.C.) control disable switch,
located on the side of the table. Placing the switch in
the OFF / STANDBY position disables the table functions. However, power is still present at the electrical
receptacles.
Table Operation using Hand Control:
When a hand control button is pressed, the hand control
sends serial digital signals to the PC control board using
two data lines. (Early units sent
PC board using
determines which function was selected by analyzing
which data lines contained a signal and then the PC
control board energizes the relay for the selected
function.
There is always line voltage potential at the output of the
relays; there is a relay for each up and down function:
BASE UP, BASE DOWN, BACK UP, and BACK
DOWN. So, when a relay is energized closing the
circuit, line voltage is applied across the relay and then
across the motor coil of the selected function, causing it
to run. When the hand control button is released, the
function's relay is de-energized, removing line voltage
from the motor coil which causes it to stop running. The
BASE DOWN function has an additional control circuit
(the base down limit switch) to prevent the base actuator
from freewheeling at the end of its down travel. The
base down limit switch is adjusted to trip just before the
base actuator is completely lowered. When the N.O.
base down limit switch is tripped closing the circuit, the
PC control board de-energizes the base down relay
causing the base actuator to stop running (even if the
hand control button is still being depressed by the
operator). This prevents the base actuator from freewheeling when it reaches the end of its down travel.
Otherwise, under heavy loads, excessive wear or
damage to base actuator could result.
When the AUTO RETURN button is depressed, the PC
control board energizes the BASE DOWN relay; the
BASE DOWN function will continue to run even if the
operator releases the button. The PC control board also
monitors the status of the normally open (N.O.) base
down limit switch. The N.O. base down limit switch is
not tripped, resulting in an open circuit, when the
actuator is in all positions but its auto return home
position (base down completely lowered). When the
base actuator reaches its auto return home position, the
base down limit switch is tripped, closing the circuit.
The PC control board senses this and de-energizes the
relay for the base down function causing the base
actuator to stop. When the base down limit switch has
tripped, stopping the base down actuator, the auto return
function is complete. The PC control board has a
backup timing circuit in case the base down limit switch
malfunctions during the auto return function. If the PC
control board does not see the status of the base down
limit switch change within approximately 17 seconds of
three
data lines). The PC control board
analog
signals to the
actuator run time, the backup circuit shuts down the
auto return function.
The STOP button may be pressed at any time during
the AUTO RETURN function. When the STOP button is
pressed, the PC control board stops the auto return
function. This de-energizes the base down relay,
stopping the base actuator.
Actuator Operation:
The base and back actuators are ball screw driven. The
actuator assemblies contain a pivot point on the end of
the ball screw. If an actuator assembly is run to the end
of its stroke, the ball screw shaft spins inside the nut,
which allows the actuator assembly to run without
damaging or advancing the nut (called freewheeling).
The base and back actuators have internal braking
mechanisms which disengage when the motor starts
running and engage when the motor stops running.
Foot Control Operation
The foot control used on later units sends serial digital
signals to the PC board using two data lines. The PC
board determines which function was selected by
analyzing which data lines contained a signal and then
energizes the relay for the selected function. The foot
control used on early units sends a signal from a
footswitch in the foot control to the PC board thru a line
which does not require any decoding.
Optional Heater Plate
Some units are equipped with the optional heater plate.
When the operator turns the (N.O.) 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.
Diagnostic L.E.D. Information
Units with serial numbers LE1000, LF1000 and LG1000
thru Present have
which can be used for troubleshooting aids. Earlier units
with serial numbers BG1000, BH1000, DK1000 and
DV1000 thru Present have
on the PC logic board. Tables 5-1 and 5-2 list all
functions for this table and which L.E.D.'s should
illuminate when a button or footswitch is depressed.
Refer to Figure 5-7 or 5-8 for location of L.E.D.'s.
four
L.E.D.'s on the PC logic board
thirteen
diagnostic L.E.D.'s
NOTE
The back up, back down, base up and base down
relay L.E.D.'s are present on
•The back up relay L.E.D. illuminates to indicate
that the PC control board is energizing the back up
relay.
•The back down relay L.E.D. illuminates to indicate
that the PC control board is energizing the back
down relay.
•The base up relay L.E.D. illuminates to indicate
that the PC control board is energizing the base up
relay.
•The base down relay L.E.D. illuminates to indicate
that the PC control board is energizing the base
down relay.
all
units.
NOTE
The following diagnostic L.E.D.'s are present on early
units with S/N: BG1000, BH1000, DK1000 and
DV1000 thru Present
•The foot control back up L.E.D. illuminates to
indicate that the PC control board is receiving a
good signal from the back up foot switch.
•The foot control back down L.E.D. illuminates to
indicate that the PC control board is receiving a
good signal from the back down foot switch.
•The foot control base up L.E.D. illuminates to
indicate that the PC control board is receiving a
good signal from the base up foot switch.
•The foot control base down L.E.D. illuminates to
indicate that the PC control board is receiving a
good signal from the base down foot switch.
•The auto return back function L.E.D. is not used
on this table.
•The auto return base function L.E.D. illuminates
to indicate that the auto return circuit for the base
function is activated. The L.E.D. stays illuminated
until the base function has completed its portion of
the auto return cycle.
only.
•There are three Data Line L.E.D.'s; data line #1
L.E.D., data line #2 L.E.D., and data line #3
L.E.D.. Different combinations of these L.E.D's
illuminate to indicate if the proper input signal is
being sent to the PC control board from the mem-
brane panels or hand control.
General Information:
All actuator motors have a thermal overload switch
which will activate if the actuator assembly is run
continuously, causing its motor to overheat. The
actuator motors are not designed for continuous operation. The normal cool off period for the thermal overload
switches is 10 - 20 minutes.
Each actuator motor has a capacitor which provides
start up power and motor run power.
There are two 0.10 amp fuses ( one 0.25 amp fuse on
early units) , located on the PC control board, which
provide over-current protection to the control circuitry of
the PC control board.
There are two 5 amp slow blow fuses, located on the PC
control board, which provide over-current protection for
each function's motor (i.e, Base fuse protects base
actuator motor).
On early units, there is
board labeled SW1 (this switch must be in the IN
position to bypass the back up limit switch which is not
used on this unit) or a jumper connector across both
SW1 pins (this jumper connector must be installed on
both SW1 pins to bypass the back up limit switch which
is not used on this unit). This prevents the back function
from moving when the auto return function is selected.
Later units with Serial Numbers LE1000, LF1000 and
LG1000 thru Present use a new style PC board and do
have the SW1 switch.
Base Up............................................... 17 ±1 seconds
Back Up............................................... 12 ±1 seconds
Weight Capacity (Maximum) .............. 300 lb. (136.0 kg)
Recommended Circuit:
A separate (dedicated) circuit is recommended for
this table. The table
electrical circuit with other appliances or equipment
unless the circuit is rated for the additional load.
should not
be connected to an
1.5Parts Replacement Ordering
If a part replacement is required, order the part directly
from the factory as follows:
(1 ) Refer to Figure 1-3 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.
o
o
(3 ) Determine the installation date of the table and
record this data.
(4 ) 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).
Table 1-2 lists all of the special tools needed to repair
the table, how to obtain the special tools, and the
purpose of each special tool.
Table 1-2. Special Tool List
SECTION I
GENERAL INFORMATION
Description of Special Tool
MultimeterCommercially AvailableAny TypeUsed to perform continuity and volt age checks.
Torque WrenchCommercially AvailableAny TypeUsed to t i ght en nuts or s cr ews to specified v alues.
In order to effectively diagnose the malfunction of the
table, it may be necessary to perform an operational test
as follows:
WARNING
Refer to the Operator Manual for
complete instructions on operating the
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 into a grounded, non-isolated,
correctly polarized outlet, that has the proper
voltage output for the table.
(2 ) Turn the CONTROLS OFF/STANDBY / ON
switch to ON.
(3) Press BACK UP, BACK DOWN, TABLE UP,
and TABLE DOWN buttons on the hand control.
Observe.
direction corresponding to the button which is
being depressed. No section of the table top
should drift on its own after its membrane
switch panel button is released. No actuator
assembly should make excessive noises.
Movement should be steady and should match
the speeds and positions listed below:
Table Speeds (@ 60 Hz.):
Back Up (Down to Up) ...................... 12 +/- 1 seconds
Table Up (Down to Up) ....................... 17 +/-1 seconds
Table Positioning
Back Section ...................................................0 to 75
Table Top Height (Adjustable): ..................... 25.0 in. to
The table top should move in the
37.0 in. (63.5 cm to 94.0 cm) (+0.5O/-0.0O)
(5 ) Raise TABLE UP function all the way up and
BACK DOWN function all the way down.
(6 ) Press the AUTO RETURN "START" button,
wait one second, and then press the AUTO
RETURN "STOP" button.
Observe.
begin to run. When the AUTO RETURN
"STOP" button is pressed, the base function
should stop running.
(7 ) Press the AUTO RETURN "START" button
again.
Observe.
table top all the way down. The base actuator
should not continue to run after table top is
completely lowered.
(8 ) Turn the CONTROLS OFF/STANDBY / ON
switch to OFF.
(9 ) Press all buttons on hand control and foot
control (if available).
Observe.
respond to any button or footswitch being
depressed.
(10) Pull footrest assembly out all the way.
Observe.
easily; not requiring more than 8 lbs (3.6 kgs)
initial pull out force.
The TABLE DOWN function should
The base actuator should lower the
The table should not move or
The footrest assembly should extend
Note
Step 11 applies only to units with new style stirrups;
S/N BG-2278, BH-1272, DK-1000, DV1000, LE1000,
LF1000 and LG1000 thru Present.
(11) Extend the stirrups; then lift up on end of
stirrups and move them laterally from the left to
the right. Let the stirrups lock into each of the
O
four positions. While applying downward
pressure, attempt to move a stirrup laterally to
the left or right.
(4) If the table has a foot control, repeat step 3 for
The stirrups should be able to be
extended and moved laterally easily. The
stirrups should lock into each of the four
positions and should not be able to be moved
laterally as long as downward pressure is
applied on the stirrup.
(12) If the unit has a heater, turn the heater ON /
OFF switch to ON.
CONTROL
OFF / STANDBY / ON
SWITCH
Observe.
The heater ON / OFF switch should
MA335300
illuminate and after a short wait, the heater plate
should warm the warming drawer.
2.2Troubleshooting Procedures
Table 2-1 is a Troubleshooting Guide which is used to
determine the cause of the malfunction.
periodically on the table. These inspections and
services should be performed as often as indicated in
Table 3-1 is a Scheduled Maintenance Chart which lists
the chart.
the inspections and services that should be performed
Table 3-1. Scheduled Maintenance Chart
IntervalInspection or ServiceWhat to Do
Semi-annuallyObvious damageVisually check condition of table for obvious damage such as: cracks in components, missing
Fasteners / hardwareCheck table for missing or loose fasteners / hardware. Replace any missing hardware and tighten
Warning and instructional
decals
BellowsCheck the bellows for rips, tears, or other damage. Replace bellows if necessary. Refer to
Pivot points / moving
parts / accessories
Hand ControlCheck that all membrane buttons on hand control work when pressed. If not, replace hand control
Foot control (optional)Check that foot control works correctly. Make sure all footswitches operate properly. Replace any
Auto return functionCheck that auto return function works correctly. Ensure that the base actuator stops running when
Ball screws of actuator
assemblies
Drifting of actuator
assemblies
Control OFF/STANDBY /
ON switch
Heater PlateCheck that the heater plate warms up properly when the heater switch is turned to ON. The heater
StirrupsCheck that the stirrups extend easily and lock positively in one of the three/four lateral positions.
FootrestCheck that the footrest pulls out smoothly and does not make noise. Lubricate all moving
Footrest Lift (optional)Check that the spring loaded footrest lift is operating properly. Replace springs if necessary.
Pelvic Tilt (optional)Check that the spring loaded pelvic tilt is operating properly. Replace springs if necessary.
Electrical receptacle (115
and 220 VAC units only)
UpholsteryCheck all upholstery for rips, tears, or excessive wear. Replace cushions as necessary.
AccessoriesCheck that all accessories have all of their components and that they function properly. If
Operational TestPerform an Operational Test to determine if the table is operating within its specifications (Refer to
(optional)
components, dents in components, or any other visible damage which would cause 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.
para 4.2.
Lubricate all exposed pivot points, moving parts, and accessories with silicone based lubricant.
panel. Refer to para 4.15.
malfunctioning footswitches. Refer to para 4.17.
it reaches its end of travel and does not "freewheel". If necessary, adjust or replace base down
limit switch. Refer to para 4.11.
Extend each actuator assembly and wipe ball screw threads down with a rag to remove foreign
matter. Coat as much of the ball screw threads as possible with STP treatment oil or equivalent.
Run each actuator assembly to both ends of its travel a couple of times to spread the oil evenly
over all of the ball screw threads and then remove excess oil. If oil does not correct an
excessively noisy actuator assembly, replace actuator assembly.
Check each actuator assembly for drift. Replace actuator assembly brake components as
necessary. Refer to para 4.16.
Check that table is operational when switch is turned to ON and is not operational when switch is
turned to OFF / STANDBY. Replace control OFF/STANDBY / ON switch if necessary. Refer to
para 4.12.
4.13.
switch should illuminate when in the ON position. If necessary, replace heater switch or heater
plate. Refer to para 4.13 or 4.14.
Replace stirrup components if necessary. Refer to para 4.18 or 4.19.
components with silicone based lubricant.
Check that the electrical receptacle is functioning properly. Replace receptacle as necessary.
necessary, repair or replace the accessory.
para 2.1). Replace or adjust any malfunctioning components.
complete instructions on operating the
table. Failure to do so could result in personal
injury.
NOTE
Perform an operational test on the table after the
repair is completed to confirm the repair was properly
made and that
The following paragraphs contain removal, installation, repair, and adjustment procedures for the table.
all
malfunctions were repaired.
4.2Bellows Assembly Removal / Installation
A. Removal
(1) Raise BACK UP function all the way up.
SHOWN
DISASSEMBLED
FOR CLARITY
9
5
11
6
5
4
8
10
WARNING
Always disconnect the power cord
from the wall outlet before removing
any of the table's covers/shrouds or making any
repairs to prevent the possibility of electrical
shock. Failure to comply with these instructions
could result in severe personal injury or death.
(2) Unplug table power cord from wall outlet.
(3) Remove four screws (1, Figure 4-1) and two
bellows retainer trim (2) from lower base
weldment (3).
(4) Remove ten screws (4) securing retaining
straps (5) to upper base (6). Lower retaining
straps and bellows (7).
(5) Remove two screws (8) and separate two top
retaining straps (5) from each other.
(6) Slide six clips (9) off of the top retaining
straps (5) and remove retaining straps from
table.
Block table as necessary to prevent it
from tipping over. Failure to do so could result in
back injury or falling table could cause injury.
(8) Tip the table onto its end (toward back section),
making sure to support lower base (3) with
blocks to prevent damage to power cord.
(9) Remove bellows (7) from table by sliding it over
the lower base (3).
B. Installation
(1) Slide new bellows (7) over lower base (3).
CAUTION
Lift table using proper lifting techniques.
Failure to do so could result in back injury.
(2) Lower the table back down onto its base.
(3) Install the bottom retaining strip (11) on
bellows (7) and secure with six clips (10).
(4) Install top retaining straps (5) on bellows (7)
and secure with six clips (9).
(5) Secure top retaining straps (5) together with
two screws (8).
(6) Raise retaining straps (5) up against upper
base (6) and secure with ten screws (4).
4.3Base Actuator Removal / Installation
(Applies to units with Serial Numbers:
BG1000 thru BG3780, BH1000 thru
BH1585 and DK1000 thru DK1068)
A. Removal
(1) If base function is operable, raise TABLE UP
function all the way up; then lower TABLE
DOWN function approximately 1 inch (2.54
cm).
If base function is inoperable because of
base capacitor, bypass malfunctioning base
capacitor (refer to para 4.29).
If base function is still inoperable, manually extend base actuator by performing steps a
thru f.
a.Raise BACK UP function all the way up;
then lower BACK DOWN function
approximately 1 inch (2.54 cm).
WARNING
Always disconnect the power cord
from the wall outlet before removing
any of the table's covers/shrouds or making any
repairs to prevent the possibility of electrical
shock. Failure to comply with these instructions
could result in severe personal injury or death.
b.Unplug table power cord from wall outlet.
c.While supporting back section, remove
two e-rings (1, Figure 4-2), clevis pin (2),
two bearing washers (3), and two link
bars (4) from back pivot bracket (5).
(7) Slide two bellows retainer trim (2) over bottom
retaining strip (11). Secure bellows retainer
trim (2) to lower base weldment (3) with four
screws (1).
(12) Raise table to its upright position.
(13) Install four drawers (5) in table.
Page 31
(14) Lower bellows (4) against lower base weldment
Return To Table Of Contents
(3); then slide two bellows retainer trim (2) over
bottom of bellows and secure with four
screws (1).
SECTION IV
MAINTENANCE / SERVICE
2
(15) If base capacitor was bypassed, remove
bypass wires (Refer to para 4.29).
4.5Base Capacitor Removal / Installation
(115 VAC Units Only)
A. Removal
(1) If TABLE UP function is operable, raise TABLE
UP function all the way up; then go to step 4.
NOTE
Steps 2 and 3 are two different ways of gaining
access to the base capacitor if TABLE UP function is
not operable. Use step 2 unless the unit is a 115
VAC unit with Serial Number BG3701 and BH1598
thru Present.
(2) If TABLE UP function
the base capacitor (Refer to para 4.29); then go
to step 4.
(3) If TABLE UP function
remove access plate as follows:
a.Remove two side drawers (1, Figure 4-7)
from table.
is not
operable, bypass
is still not
operable,
3
1
4
MA336000
Figure 4-7. Cover Plate Removal / Installation
WARNING
Always unplug the power cord from
the wall outlet before removing any of
the table's shrouds/covers or making any repairs
to prevent the possibility of electrical shock.
Failure to comply with these instructions could
result in severe personal injury or death.
(6) Unplug power cord from wall outlet.
b.Unplug table power cord from wall outlet.
c.Remove four screws (2) and cover plate
(3) from upper base weldment (4) to gain
access to base capacitor.
d.Go to step 4.
(4) Remove four screws (1, Figure 4-8) and two
bellows retainer trim (2) from lower base
weldment (3).
(5 ) Raise bellows (4) and support in the up position
bracket (5) outward and separate base capacitor (6) from mounting bracket.
(8) Remove capacitor cap (7) from base capaci-
tor (6).
WARNING
The capacitor contains stored electric-
ity. Never touch terminals of capacitor,
even if power has been disconnected. Always
discharge capacitor before touching capacitor
terminals or wires. Failure to comply with these
instructions could result in serious personal
injury or death.
(5 ) Discharge base capacitor (6).
Page 32
SECTION IV
Return To Table Of Contents
MAINTENANCE / SERVICE
(6) If removed, install access plate as follows:
4
TABS
3
8
6
7
PROP
5
CATCH
1
2
Figure 4-8. Base Capacitor Removal / Installation
(6) Disconnect two wires (8) from terminals of base
capacitor (6) and remove base capacitor.
B. Installation
(1) Connect one wire (8) to each terminal group of
base capacitor (6).
(2) Install capacitor cap (7) on base capacitor (6).
(3) Position the bottom of base capacitor (6) on
mounting bracket (5) and then push the top of
the capacitor inward. Using a screwdriver,
force the tab of the mounting bracket (5) down
over the catch of the capacitor cap (7). Make
sure base capacitor (6) is held firmly in place.
(4) Remove prop and lower bellows (4).
(5) Slide two bellows retainer trim (2) over the
bottom of bellows (4). Secure bellows retainer
trim (2) to lower base weldment (3) with four
screws (1).
MA336100
a.Install cover plate (3, Figure 4-7) on
upper base weldment (4) and secure with
four screws (2).
b.Install two side drawers (1) in table.
(7) If base capacitor was bypassed, remove
bypass wires (Refer to para 4.29).
(8) Plug power cord into wall outlet.
4.6Base Capacitor Removal / Installation
(100 VAC and 230 VAC Units Only)
A. Removal
(1) If TABLE UP function is operable, raise TABLE
UP function all the way up; then go to step 3.
NOTE
Step 2 is a different way of gaining access to the
base capacitor if TABLE UP function is not operable.
(2) If TABLE UP function
the base capacitor (Refer to para 4.29) and
raise TABLE UP function all the way up; then
go to step 3.
(3) Unplug table power cord from wall outlet.
(4) Remove four screws (1, Figure 4-9) and two
bellows retainer trim (2) from lower base
weldment (3).
(5) Raise bellows (4) and support in the up posi-
tion.
is not
operable, bypass
WARNING
Always unplug the power cord from
the wall outlet before removing any of
the table's shrouds/covers or making any repairs
to prevent the possibility of electrical shock.
Failure to comply with these instructions could
result in severe personal injury or death.
bracket (5) outward and separate base
capacitor (6) from mounting bracket.
b.Remove capacitor cap (7) from base
capacitor (6).
WARNING
The capacitor contains stored electric-
ity. Never touch terminals of capacitor, even if power has been disconnected. Always discharge capacitor before touching
capacitor terminals or wires. Failure to comply
with these instructions could result in serious
personal injury or death.
c.Discharge base capacitor (6).
d.Disconnect two wires (8) from terminals
of base capacitor (6) and remove base
capacitor.
(8) To remove 230 VAC base capacitor:
WARNING
The capacitor contains stored electric-
ity. Never touch terminals of capacitor, even if power has been disconnected. Always discharge capacitor before touching
capacitor terminals or wires. Failure to comply
with these instructions could result in serious
personal injury or death.
a.Discharge base capacitor (9).
b.Disconnect two wires (10) from base
capacitor (9).
c.Remove two screws (11), capacitor
clamp (12), and capacitor (9) from switch
contact bracket (13).
10
12
11
4
9
13
5
6
TABS
CATCH
7
3
1
2
MA336200
Figure 4-9. Base Capacitor Removal / Installation
B. Installation
(1) To install 230 VAC base capacitor:
a.Install base capacitor (9) on switch
contact bracket (13) and secure with
capacitor clamp (12) and two
screws (11).
b.Connect two wires (10) to base capaci-
tor (9).
(2) To install 100 VAC base capacitor:
8
a.Connect one wire (8) to each terminal
group of base capacitor (6).
b.Install capacitor cap (7) on base capaci-
tor (6).
c.Position the bottom of base capacitor (6)
on mounting bracket (5) and then push
the top of the capacitor inward. Using a
screwdriver, force the tab of the mounting
bracket (5) down over the catch of the
capacitor cap (7). Make sure base
capacitor (6) is held firmly in place.
brackets (5) and secure with two shoulder
bolts (3).
(6) Connect three actuator wires (2) to three
wires (1).
Page 35
7
Return To Table Of Contents
8
4
9
3
2
11
10
1
9
7
6
Figure 4-11. Back Actuator Removal / Installation
5
MA336400
SECTION IV
MAINTENANCE / SERVICE
(2) Unplug table power cord from wall outlet.
NOTE
If the back actutator is inoperable, the back section
can be raised manually high enough to gain access
to perform the following step.
(3) While supporting back section (1, Figure 4-12),
remove two e-rings (2), clevis pin (3), two
bearing washers (4), and link bars (5) from
back pivot bracket (6).
(4) Carefully fold the back section (1) over onto the
seat section.
(5) Remove four screws (7) and back cover (8)
from upper wrap weldment (9).
NOTE
For new style units with serial numbers: LE1000,
LF1000 and LG1000 thru present, it is necessary to
remove the motor cover to gain access to back
capacitor .
(7) Install motor cover (12, Figure 4-10) on upper
wrap weldment (10) and secure with four
screws (11).
(8) Install back cover (9) on upper wrap weldment
(10) and secure with four screws (8).
(9) Lower back section (6) down; then install two
link bars (4) on back pivot bracket (5) and
secure with two bearing washers (3), clevis pin
(2), and two e-rings (1).
(10) Plug table power cord into wall outlet.
4.8Back Capacitor Removal / Installation
A. Removal
(1) If possible, raise the BACK UP function all the
way up.
WARNING
Always unplug the power cord from
the wall outlet before removing any of
the table's shrouds/covers or making any repairs
to prevent the possibility of electrical shock.
Failure to comply with these instructions could
result in severe personal injury or death.
(6) If necessary, remove four screws (10) and
motor cover (11) from upper wrap assembly (9).
NOTE
Figure 4-13 shows back capacitor mounting position
on old style units. The same procedure applies to
new style units with capacitor mounted inside motor
housing.
(7) To remove 100 VAC or 120 VAC back capaci-
tor:
a.Using a screwdriver, pry tab of mounting
bracket (1, Figure 4-13) outward and
separate back capacitor (2) from mounting bracket.
b.Remove capacitor cap (3) from back
capacitor (2).
WARNING
The capacitor contains stored electric-
ity. Never touch terminals of capacitor, even if power has been disconnected. Always discharge capacitor before touching
capacitor terminals or wires. Failure to comply
with these instructions could result in serious
personal injury or death.
c.Discharge back capacitor (2).
d.Disconnect two wires (4) from terminals
of back capacitor (2) and remove back
capacitor.
11
7
10
9
MA336501
2
3
1
TABS
4
Figure 4-13. Back Capacitor Removal / Installation
CATCH
MA336600
(7) To remove 230 VAC back capacitor:
WARNING
The capacitor contains stored electric-
ity. Never touch terminals of capacitor, even if power has been disconnected. Always discharge capacitor before touching
capacitor terminals or wires. Failure to comply
with these instructions could result in serious
personal injury or death.
a.Discharge back capacitor (A,
Figure 4-13).
b.Disconnect two wires (B) from terminals
of back capacitor (A).
c.Remove two screws (C), capacitor clamp
(D), and back capacitor (A) from upper
wrap weldment (E).
upper wrap weldment (E) and secure
with capacitor clamp (D) and two
screws (C).
b.Connect one wire (B) to each terminal
group of back capacitor (A).
c.Go to step 3.
Page 37
SECTION IV
Return To Table Of Contents
MAINTENANCE / SERVICE
(2) Install 100 VAC and 120 VAC back capacitor
as follows:
a.Connect one wire (4, Figure 4-13) to
each terminal group of back capacitor (2).
b.Install capacitor cap (3) on back capaci-
tor (2).
c.Position the bottom of back capacitor (2)
on mounting bracket (1) and then push
the top of the capacitor inward. Using a
screwdriver, force the tab of the mounting
bracket (1) down over the catch of the
capacitor cap (3). Make sure back
capacitor (2) is held firmly in place.
(3) If necessary, install motor cover (11, Figure 4-
12) and secure to upper wrap assembly (12)
with four screws (10).
(3) Install back cover (8) on upper wrap weld-
ment (9) and secure with four screws (7).
NOTE
If the back actutator is inoperable, the back section
can be raised manually high enough to gain access
to perform the following step.
(3) While supporting back section (1, Figure 4-14),
remove two e-rings (2), clevis pin (3), two
bearing washers (4), and link bars (5) from
back pivot bracket (6).
(4) Carefully fold the back section (1) over onto the
seat section.
(5) Remove four screws (7) and back cover (8)
from upper wrap weldment (9).
(6) Disconnect wire harness (1, Figure 4-15) from
transformer wire harness (2).
(7) Remove cable ties as necessary.
(8) Remove four screws (3), lockwashers (4), and
transformer (5) from upper wrap weldment (6).
(4) Lower back section (1) down; then secure two
link bars (5) to back pivot bracket (6) with two
bearing washers (4), clevis pin (3), and two erings (2).
(5) Plug table power cord into wall outlet.
4.9Transformer Removal / Installation
(100 VAC Units Only)
A. Removal
(1) If possible, raise the BACK UP function all the
way up.
WARNING
Always unplug the power cord from
the wall outlet before removing any of
the table's shrouds/covers or making any repairs
to prevent the possibility of electrical shock.
Failure to comply with these instructions could
result in severe personal injury or death.
4.10PC Control Board Removal / Installation (Applies to units with Serial
Numbers: BG1000, BH1000, DK1000
and DV1000 thru Present)
A. Removal
WARNING
Always unplug the power cord from
the wall outlet before removing any of
the table's shrouds/covers or making any repairs
to prevent the possibility of electrical shock.
Failure to comply with these instructions could
result in severe personal injury or death.
Figure 4-15. Transformer Removal / Installation
B. Installation
(1) Install transformer (5, Figure 4-15) on upper
wrap weldment (6) and secure with four
lockwashers (4) and screws (3).
(2) Connect transformer wire harness (2) to wire
harness (1).
(3) Secure wires as necessary with cable tie(s).
(4) Install back cover (8, Figure 4-14) on upper
wrap weldment (9) and secure with four
screws (7).
(5) Lower back section (1) down; then secure two
link bars (5) to back pivot bracket (6) with two
bearing washers (4), clevis pin (3), and two e-
rings (2).
(6) Plug table power cord into wall outlet.
(1) Unplug table power cord from wall outlet.
(2) Remove two drawers (1, Figure 4-16) from foot
end of table.
(3) Remove six screws (2), cover plate (3), and
gasket (4) from upper base weldment (5).
(4) Disconnect two wire harnesses (6) from PC
control board (7).
(5) Disconnect two modular cords (8) from PC
control board (7).
(6) Tag five wires (9); then loosen five terminal
screws (10) and disconnect five wires (9) from
terminal strip of PC control board (7).
(1) On older units, check position of SW1 (12). If
SW1 is not in pushed in position, push SW1 in.
On newer units, check to make sure jumper
connector (12A) is installed. If not installed,
install jumper connector (12A) on
pins (12B).
(2) Install PC control board (7) on four standoffs
(11) and secure by turning head of each
standoff 1/4 turn in the clockwise (right) direction, locking standoff.
both
SW1
1
5
(3) Make sure two jumper strips are installed on
terminal strip and did not fall out during wire
disconnection. See Figure 5-1 thru 5-3 for
jumper strip location.
(4) Connect five wires (9) to terminal strip of PC
control board (7) and secure by tightening five
terminal screws (10).
(5) Connect two modular cords (8) to PC control
board (7).
(6) Connect two wire harnesses (6) to PC control
board (7).
EQUIPMENT ALERT
Make sure gasket is sealing properly.
Failure to do so could result in contaminants, especially liquids, dripping onto PC control
board and damaging it.
(7) Install gasket (4) and cover plate (3) on upper
4.11PC Control Board Removal / Installation (Applies to units with Serial
Numbers: LE1000, LF1000 and
LG1000 thru Present)
A. Removal
WARNING
Always unplug the power cord from
the wall outlet before removing any of
the table's shrouds/covers or making any repairs
to prevent the possibility of electrical shock.
Failure to comply with these instructions could
result in severe personal injury or death.
(1) Unplug table power cord from wall outlet.
(2) Remove two drawers (1, Figure 4-17) from foot
end of table.
(3) Remove six screws (2), cover plate (3) and
gasket (4) from upper base weldment (5).
(4) Tag and disconnect two wire harnesses (6)
from PC control board (7).
(5) Tag and disconnect four modular cords (8) from
PC control board (7).
(6) Tag and disconnect wire harness (9) from PC
control board (7).
(7) Tag seven wires (10); then loosen seven
terminal screws (11) and disconnect seven
wires (10) from terminal strip of PC control
board (7).
(3) Connect seven wires (10) to terminal strip of
PC control board (7) and secure by tightening
seven terminal screws (11).
(4) Connect wire harness (9) to PC control
board (7).
(5) Connect four modular cords (8) to PC control
board (7).
(6) Connect two wire harnesses (6) to PC control
board (7).
(7) Install gasket (4) and cover plate (3) on
upper base weldment (5) and secure with
six screws (2).
(8) Install two drawers (1) into table.
(9) Plug table power cord into wall outlet.
4.12Base Down Limit Switch Removal /
Installation
A. Removal
(1) Raise TABLE UP function all the way up.
WARNING
Always unplug the power cord from
the wall outlet before removing any of
the table's shrouds/covers or making any repairs
to prevent the possibility of electrical shock.
Failure to comply with these instructions could
result in severe personal injury or death.
(2) Unplug table power cord from wall outlet.
(8) Check jumper strips to ensure they are in
place.
(9) Remove four screws (12) and PC control
board (7) from upper base weldment (5).
B. Installation
(1) Install PC control board (7) in upper base
weldment (5) and secure with four screws (12).
(2) Make sure two jumper strips are installed on
terminal strip and did not fall out during wire
disconnection. See Figure 5-1 thru 5-3 for
jumper strip location.
(2) Install base down limit switch (8) on limit switch
bracket (6) and secure with nut (9).
(3) Connect one wire (7) to N.O. terminal and the
other wire to COM. terminal of base down limit
switch (8).
(4) Install limit switch bracket (6) on center support
(4) and secure with two screws (5); do not
tighten screws at this time.
C. Adjustment
NOTE
If performing base down limit switch adjustment only,
perform steps 1 thru 4 of Removal before proceeding.
(1) Slide limit switch bracket (6) up as far as it will
go and then tighten two screws (5).
(2) Plug table power cord into wall outlet.
(3) Raise TABLE UP function up approximately
halfway.
(4) Press the AUTO RETURN "START" button and
observe.
4.13Control Disable Switch Removal /
Installation
A. Removal
WARNING
Always unplug the power cord from
the wall outlet before removing any of
the table's shrouds/covers or making any repairs
to prevent the possibility of electrical shock.
Failure to comply with these instructions could
result in severe personal injury or death.
(1) Unplug table power cord from wall outlet.
(2) Remove two drawers (1, Figure 4-19) from the
foot end of the table.
NOTE
Units with Serial Numbers BG1000, BH1000,
DK1000 and DV1000 thru Present do not have
disable switch enclosure.
(3) Remove two nuts (2) and disable switch
enclosure (3) from side panel (4).
(5) The base actuator should stop running auto-
matically when the table top is completely
lowered.
(6) If the base down limit switch (8) is adjusted
properly, go to step 9.
If the base down limit switch (8) keeps running
and freewheels when the table top is completely lowered, go to step 7.
(7) Loosen two screws (5); then slide limit switch
bracket (6) downward 1/4 inch (6.3 mm) and
retighten screws (5).
(8) Repeat steps 1 thru 7 until base actuator stops
automatically and does not freewheel when
table is completely lowered.
(9) Install actuator cover (3) on center support (4)
locking tabs, push control disable switch (6) out
of side panel (4).
B. Installation
(1) Push control disable switch (6) into side
panel (4) until it locks into position.
(2) Connect two wires (5) to control disable
switch (6).
(3) If necessary, install disable switch enclosure (3)
and secure to side panel (4) with two nuts (2).
(4) Install two drawers (1) in table.
(5) Plug table power cord into wall outlet.
4.14Heater ON / OFF Switch Removal /
Installation
A. Removal
WARNING
Always unplug the power cord from
the wall outlet before removing any of
the table's shrouds/covers or making any repairs
to prevent the possibility of electrical shock.
Failure to comply with these instructions could
result in severe personal injury or death.
(1) Unplug table power cord from wall outlet.
(2) Using a standard screwdriver, carefully pry
heater switch (1, Figure 4-20) out of upper wrap
weldment (2), making sure not to scratch table.
(3) Tag and disconnect four wires (3) from heater
switch (1).
B. Installation
(1) Connect four wires (3) to heater switch (1).
(2) Push heater switch (1) into upper wrap
weldment (2) until heater switch "pops" into
place.
the wall outlet before removing any of
the table's shrouds/covers or making any repairs
to prevent the possibility of electrical shock.
Failure to comply with these instructions could
result in severe personal injury or death.
(1) Unplug table power cord from wall outlet.
(2) Remove two drawers (1, Figure 4-21) from foot
end of table.
(3) Remove heater ON / OFF switch (Refer to
para 4.13).
(4) Pull foot rest section (2) out as far as it will go.
(5) Raise seat section (3) up.
NOTE
Early units have a heater wire cover while later units
use a stirrup guide.
NOTE
Spacers (11) are only used on old style heater
plates. Also, old style heater plates are secured with
three screws (10) while new style heater plates are
secured with two screws (10).
Spacers are only used on older units with a flat
profile heater plate. Also, old style heater plates are
secured with three screws (10) while new style
heater plates are secured with two screws (10).
(8) Remove screws (10), heater plate (9), spacers
(11) (old style heater plate only), and insulation
(12) from upper wrap weldment (7).
B. Installation
(1) Route heater plate (9) wires thru wire hole in
upper wrap weldment (7).
or
(7) While holding footrest lift down, push foot rest
section (2) all the way in to its stowed position.
(8) Install two drawers (1) in table.
(9) Plug table power cord into wall outlet.
4.18Typical Actuator Motor / Actuator
Brake Removal / Installation
A. Removal
(1) Remove malfunctioning actuator assembly:
Base actuator assembly (Refer to para 4.3
or 4.4).
Back actuator assembly (Refer to para 4.7).
(2) Remove two nuts (1, Figure 4-24) and actuator
motor (2) from actuator mechanism (3).
(3) Remove two shoulder washers (4) from actua-
tor mechanism (3).
(4) Remove spacer (5) and motor coupler (6) from
shaft of actuator motor (2).
NOTE
A needle nose pliers should be used to extract the
actuator brake from the actuator mechanism. Grasp
the raised round plate of the actuator brake with the
pliers and pull.
(5) Remove actuator brake (7) and rubber damper
(8) from shaft of actuator mechanism (3).
B. Installation
NOTE
The rubber damper must be installed so its flat side
faces the inside of the actuator mechanism. The
actuator brake must be installed so its flattest side
faces outward. The shaft of the actuator mechanism
may be turned with a screwdriver to help align the
keys of the actuator mechanism shaft with the key
slots in actuator brake.
Base actuator assembly (Refer to para 4.3
or 4.4).
Back actuator assembly (Refer to para 4.7).
(6) Check actuator assembly for proper operation.
The actuator assembly should run normally
and should not make a grinding noise; this
indicates that key slots of motor coupler were
not aligned properly with keys of actuator
mechanism (the grinding noise also indicates
that the motor coupler is being damaged). The
actuator assembly should brake properly.
5
MA337500
(2) Install motor coupler (6) on shaft of actuator
motor (2).
(3) Install two shoulder washers (4) in actuator
mechanism (3).
(4) Align keys of actuator mechanism (3) shaft with
key slots of motor coupler (6) and then install
actuator motor (2) on actuator mechanism (3)
and secure with two nuts (1).
moval / Installation (Applies to units
with Serial Numbers: BG1000,
BH1000, DK1000 and DV1000 thru
Present)
A. Removal
WARNING
Always unplug the power cord from
the wall outlet before removing any of
the table's shrouds/covers or making any repairs
to prevent the possibility of electrical shock.
Failure to comply with these instructions could
result in severe personal injury or death.
(1) Unplug the table power cord from the wall
outlet.
SECTION IV
MAINTENANCE / SERVICE
PIVOT
BALL
2
1
3
8
9
6
5
7
(2) Remove screw (1, Figure 4-25), lockwasher
(2), and pedal (3) from foot switch bracket (4).
(3) Remove two locknuts (5), screws (6), two
insulators (7), and footswitch (8) from
footswitch bracket (4).
(4) Tag and disconnect two or three wires (9) from
terminals of footswitch (8). Remove footswitch.
B. Installation
(1) Connect two or three wires (9) to terminals of
footswitch (8).
(2) Install footswitch (8) on foot switch bracket (4)
and secure with two insulators (7), screws (6),
and locknuts (5).
(3) Ensure springs (10) are in position and have
not fallen off.
(4) Install pedal (3) on foot switch bracket (4) and
secure with lockwasher (2) and screw (1),
making sure pedal is mounted on pivot spacer.
(Applies to units with Serial
Numbers: LE1000, LF1000 and
LG1000 thru Present)
A. Removal
(1) Unplug the foot control cord from the table.
(2) Remove two screws (1, Figure 4-26) and strain
relief bracket (2).
(3) Remove four screws (3) and partially separate
foot control top (4) from foot control base (5).
(4) Disconnect foot control cord (6) from PC
board (7).
(5) Disconnect wire harness (8) from PC board (7)
and remove foot control top (4).
(6) Remove four screws (9) and partially separate
PC board (7) from foot control top (4).
NOTE
Be sure to trace the switch leads from the faulty
switch to the proper wire harness at the board. The
switch being replaced dictates which wire harness to
remove.
(7) Disconnect correct wire harness (10) from PC
board (7).
(8) Tag switch lead (11) with position; then using a
small screwdriver or similar device, gently
depress the silver tab (A) of the switch
lead (11) thru the hole in the wire harness
connector (10) and pull the switch lead out of
the connector. Repeat this procedure for the
second switch lead.
(9) Remove nut (12), lockwasher (13) and
switch (14) from foot control top (4).
Figure 4-26. Foot Control
Removal / Installation
B. Installation
Function Button
Switch
EQUIPMENT ALERT
The soldered connections at the switch
are very delicate. Use caution when
tightening nut. Failure to do so could result in broken
connections at the switch.
(1) Install switch (14) into foot control top (4)
and secure with lockwasher (13) and nut (12).
(2) Insert two switch leads (11) into proper position
at wire harness connector (10) and push
inward until they snap into place.
(4) Secure PC board (7) to foot control top (4) with
Return To Table Of Contents
four screws (9).
(5) Connect wire harness (8) to PC board (7).
(6) Connect foot control cord (6) to PC board (7).
(7) Install foot control top (4) onto foot control
base (5) and secure with four screws (3).
(8) Place foot control cord (6) into notch (B) of
foot control base (5); then install strain relief
bracket (2) and secure with two screws (1).
SECTION IV
MAINTENANCE / SERVICE
4.20B Typical Foot Control
Foot Pedal
Switch Removal / Installation
(Applies to units with Serial Num-
bers: LE1000, LF1000and LG1000
thru Present)
A. Removal
(1) Refer to para 4.20A (Removal - steps 1 thru 5).
(2) Remove four screws (1, Figure 4-27), two
pedal caps (2), foot control pedal (3) and two
springs (4) from foot control base (5).
(3) Tag switch lead (6) with position; then using a
small screwdriver or similar device, gently
depress the silver tab of the switch
lead (6) thru the hole (A) in the wire harness
connector (7) and pull the switch lead out of
the connector. Repeat this procedure for the
second switch lead.
(4) Remove two screws (8) and switch cover (9).
(5) Pull two switch leads (6) thru hole (B).
Figure 4-27. Foot Control
Removal / Installation
(1) Install switch (12) into foot control base (5) and
secure with lockwasher (11) and nut (10).
(2) Feed two switch leads (6) up thru hole (B).
(3) Insert switch leads (6) into proper position at
wire harness connector (7) and push inward
until they snap into place.
(4) Install switch cover (9) and secure with two
screws (8).
Foot Pedal
Switch
(6) Remove nut (10), lockwasher (11) and
switch (12) from foot control base (5).
B. Installation
EQUIPMENT ALERT
The soldered connections at the switch
are very delicate. Use caution when
tightening nut. Failure to do so could result in broken
connections at the switch.
4.24Stirrup Components Removal /
Installation (Applies to units with
Serial Numbers: BG2278, BH1272,
DK1000, DV1000, LE1000, LF1000
and LG1000 thru Present)
MA337700
7
FOOTREST
LIFT
2
4
3
Figure 4-31. Stirrup Components
Removal / Installation (later units)
5
6
8
MA337800
A. Removal
(1) Raise seat section (1, Figure 4-31) up.
(2) Pull foot rest section (2) out all the way.
(3) Pull stirrup (3) out far enough to access
screw (4).
(4) Remove screw (4) from stirrup (3).
(5) Pull stirrup (3) out of pivot boss (5).
(3) Slide stirrup (3) thru slots in pivot boss (5) and
guide bracket (6).
(4) Install screw (4) on stirrup (3).
(5) While holding footrest lift down, push foot rest
section (2) all the way in to its stowed position.
(6) Lower the seat section (1).
2
4.25 Fuse Removal / Installation
(220 VAC CE Units Only)
A. Removal
WARNING
Always unplug the power cord from
the wall outlet before removing any of
the table's shrouds/covers or making any repairs
to prevent the possibility of electrical shock.
Failure to comply with these instructions could
result in severe personal injury or death.
A. Removal
(1) Unplug the table power cord from the wall
outlet.
(2) Using a flat- bladed screwdriver, rotate fuse
cap(s) (1, Figure 4-32) counterclockwise and
pull fuse cap(s) from fuse housing(s) (2).
(3) Pull fuse(s) (3) out of fuse cap(s) (1).
3
1
MA487800
Figure 4-32. Fuse Removal / Installation
(220 VAC CE units only)
4.26Footrest Extension Removal /
Installation
A. Removal
B. Installation
(1) Insert fuse(s) (3) into fuse cap(s) (1).
(2) Insert fuse cap(s) into fuse housing(s) (2); then
using a flat-bladed screwdriver, gently rotate
fuse cap(s) (1) clockwise until fuse cap(s) is
locked into fuse housing(s).
(1) Raise seat section (1, Figure 4-33) up.
(2) Pull foot rest section (2) out as far as it will go.
(3) Remove footrest pad (3) from foot rest sec-
tion (2).
(4) Using fingers, press up locking snaps (4) to
release foot rest section (2); then pull foot rest
section out of upper wrap weldment (5).
Page 55
SECTION IV
4
VIEW FROM
BENEATH
FOOTREST
Return To Table Of Contents
MAINTENANCE / SERVICE
B. Installation
(1) Press up on locking snaps (4) of foot rest
section (2); then slide foot rest section into
upper wrap weldment (5).
(2) Install footrest pad (3) on foot rest section (2).
(3) While holding footrest lift down, push foot rest
section (2) all the way in to its stowed position.
4.27Hand Control Inlet Board
Removal / Installation (Applies to
units with Serial Numbers: LE1000,
LF1000 and LG1000 thru Present)
A. Removal
WARNING
Always unplug the power cord from
the wall outlet before removing any of
the table's shrouds/covers or making any repairs
to prevent the possibility of electrical shock.
Failure to comply with these instructions could
result in severe personal injury or death.
(1) Unplug table power cord from wall outlet.
NOTE
To access the hand control inlet board located at the
head end of the table, remove the two side drawers.
To access the hand control inlet board located on the
side of the table, remove the two drawers from the
foot end of the table.
3
FOOTREST
LIFT
(2) Remove two drawers (1, Figure 4-34) from
table.
NOTE
The hand control inlet board located at the head end
of the table does not have the disable switch enclo-
1
5
sure (4).
(3) Remove two nuts (2) and disable switch
enclosure (3) from side panel (4).
(4) Disconnect wire harness (5) from hand control
inlet board (6).
(5) Remove two nuts (7), ground wire (8),
two lockwashers (9) and hand control inlet
board (6) from mounting studs of side
panel (4).
(1) Connect wire harness (5) to hand control inlet
board (6).
(2) Install hand control inlet board (6), two
lockwashers (9) and ground wire (8) onto
mounting studs of side panel (10) and secure
with two nuts (7).
(3) If necessary, install disable switch enclosure (3)
and secure to side panel (4) with two nuts (2).
(4) Install two drawers (1) into table.
(5) Plug table power cord into wall outlet.
4.28Foot Control Inlet Board Removal /
Installation (Applies to units with
Serial Numbers: LE1000, LF1000
and LG1000 thru Present)
A. Removal
(1) Raise TABLE UP function all the way up.
WARNING
Always unplug the power cord from
the wall outlet before removing any of
the table's shrouds/covers or making any repairs
to prevent the possibility of electrical shock.
Failure to comply with these instructions could
result in severe personal injury or death.
(2) Unplug table power cord from wall outlet.
(3) Remove four screws (1, Figure 4-35) and two
bellows retainer trim (2) from lower base
weldment (3).
Figure 4-34. Hand Control Inlet Board Removal /
Installation
(4) Raise bellows (4) and support in the up position
with a prop.
(5) Remove two screws (5); then remove foot
control inlet board (6) from lower base
weldment (3) by gently pulling modular cord (7).
(6) Remove screw (8), ground wire (9), lock-
washer (10) and cable clamp (11) from scissor
base (12).
(7) Disconnect modular cord (7) from foot control
inlet board (6) and remove inlet board from
lower base weldment (3).
B. Installation
(1) Secure cable clamp (11), lockwasher (10), and
ground wire (9) to scissor base with screw (8).
(2) Connect modular cord (7) to foot control inlet
board (6); then insert inlet board into hole in
lower base weldment (3).
board (6) with holes in lower base weldment (3)
and secure with two screws (5).
Page 57
SECTION IV
Return To Table Of Contents
MAINTENANCE / SERVICE
Figure 4-35. Foot Control Inlet Board Removal /
Installation
(4) Remove prop and lower bellows (4).
(5) Slide two bellows retainer trim (2) over the
bottom of bellows (4). Secure bellows retainer
trim (2) to lower base weldment (3) with four
screws (1).
(6) Plug table power cord into wall outlet.
4.29Bypass of Malfunctioning Base
Capacitor
A. Insertion of Bypass Wires
WARNING
Always unplug the power cord from
the wall outlet before removing any of
the table's shrouds/covers or making any repairs
to prevent the possibility of electrical shock.
Failure to comply with these instructions could
result in severe personal injury or death.
(1) Unplug table power cord from wall outlet.
(2) Remove two drawers (1, Figure 4-36) from foot
Step 4 applies to early units with Serial Numbers:
BG1000, BH1000, DK1000 and DV1000 thru Present
only. For later units, go to step 5.
(4) Using two wires (6) approximately 6 inches
(15.2 cm) in length with bare lead ends, jump
from terminal #1 (red wire) to terminal #6 (red
wire) and also from terminal #4 (black) to
terminal #3 (black) of connector (7); then go to
step 6.
NOTE
Step 5 applies to later units with Serial Numbers:
LE1000, LF1000 and LG1000 thru Present only.
(5) Using two wires (8) approximately 6 inches
(15.2 cm) in length with bare lead ends, jump
from terminal #1 (red wire) of base motor
connector (9), to terminal #3 (red wire) of back
motor connector (10) and also from terminal #3
(black wire) of base motor connector (9), to
terminal #1 (black wire) of back motor connector (10); then go to step 6.
EQUIPMENT ALERT
Make sure gasket is sealing properly.
Failure to do so could result in contaminants, especially liquids, dripping onto PC control
board and damaging it.
(4) Install gasket (4) and cover plate (3) on upper
base weldment (5) and secure with six
screws (2).
(5) Install two drawers (1) in table.
(6) Plug table power cord into wall outlet.
(7) Run TABLE UP function all the way up.
B. Removal of Bypass Wires
(1) Unplug table power cord from wall outlet.
NOTE
Step 2 applies to early units with Serial Numbers:
BG1000, BH1000, DK1000 and DV1000 thru Present
only. For later units, go to step 3.
(2) Remove bypass wires (6) from connector (7);
then go to step 4.
NOTE
Step 3 applies to later units with Serial Numbers:
LE1000, LF1000 and LG1000 thru Present only.
(3) Remove bypass wires (8) from base motor
connector (9) and back motor connector (10);
then go to step 4.
Table 5-1 can be used to troubleshoot the table thru
diagnosis of a function's L.E.D. status. The first column
Table 5-1. Diagnostic L.E.D. Chart for Units with Serial Numbers LE-1000
LF-1000 and LG-1000 thru Present
Selected Function ButtonL.E.D's Which Should Be Illuminated When Function Is Selected
lists each function that may be selected by an operator.
The second column lists which L.E.D's will illuminate,
when a particular function is selected when the unit is
functioning properly.
Hand Control
BASE UP buttonbase up relay L.E.D.
BASE DOWN buttonbase down relay L.E.D.
BACK UP buttonback up relay L.E.D.
BACK DOWN buttonback down relay L.E.D.
AUTO RETURN buttonbase down relay L.E.D.
STOP buttonnone
Foot Control
BASE switch then UP pedalbase up relay L.E.D.
BASE switch then DOWN pedalbase down relay L.E.D.
BACK switch then UP pedalback up relay L.E.D.
BACK switch then DOWN pedalback down relay L.E.D.
AUTO RETURN switch then DOWN pedalbase down relay L.E.D.
STOP switchnone
Table 5-2. Diagnostic L.E.D. Chart for Units with Serial Numbers BG-1000, BH-1000
DK-1000 and DV-1000 thru Present
Selected Function ButtonL.E.D's Which Should Be Illuminated When Function Is Selected
Hand Control
BASE UP buttondata line #1 L.E.D. / data line #3 L.E.D. / base up relay L.E.D.
BASE DOWN buttondata line #2 L.E.D. / data line #3 L.E.D. / base down relay L.E.D.
BACK UP buttondata line #1 L.E.D. / back up relay L.E.D.
BACK DOWN buttondata line #2 L.E.D. / back down relay L.E.D.
AUTO RETURN buttondata line #3 L.E.D. / auto return base function L.E.D. / base down relay L.E.D.
STOP buttondata line #1 L.E.D. / data line #2 L.E.D. / data line #3 L.E.D.
Foot Control
BASE UP foot pedalfoot control base up L.E.D. / base up relay L.E.D.
BASE DOWN foot pedalfoot control base down L.E.D. / base down relay L.E.D.
BACK UP foot pedalfoot control back up L.E.D. / back up relay L.E.D.
BACK DOWN foot pedalfoot control back down L.E.D. / back down relay L.E.D.
NOTE:All amber L.E.D's stay illuminated only as long as their function button is depressed. The green auto return
base function L.E.D remains illuminated until the base actuator has reached its limit and its limit switch has
become tripped.
See following page for description of each L.E.D's meaning when illuminated.
Description of each L.E.D's meaning when illuminated
(All units as applicable. See Figures 5-7 and 5-8 for L.E.D. locations.)
•The back up relay L.E.D. illuminates to indicate that the PC control board is energizing the back up relay.
•The back down relay L.E.D. illuminates to indicate that the PC control board is energizing the back down relay.
•The base up relay L.E.D. illuminates to indicate that the PC control board is energizing the base up relay.
•The base down relay L.E.D. illuminates to indicate that the PC control board is energizing the base down relay.
•The foot control back up L.E.D. illuminates to indicate that the PC control board is receiving a good signal from
the back up foot switch.
•The foot control back down L.E.D . illuminates to indicate that the PC control board is receiving a good signal from
the back down foot switch.
•The foot control base up L.E.D. illuminates to indicate that the PC control board is receiving a good signal from
the base up foot switch.
•The foot control base down L.E.D. illuminates to indicate that the PC control board is receiving a good signal from
the base down foot switch.
•The auto return back function L.E.D. is not used on this table.
•The auto return base function L.E.D. illuminates to indicate that the auto return circuit for the base function is
activated. The L.E.D. stays illuminated until the base function has completed its portion of the auto return cycle.
•There are three Data Line L.E.D.'s; data line #1 L.E.D., data line #2 L.E.D., and data line #3 L.E.D.. Different
combinations of these L.E.D's illuminate to indicate if the proper input signal is being sent to the PC control board
from the membrane panels or hand control.
MA472200
0.1 amp
0.1 amp
5 amp
5 amp
1
2
3
4
5
6
7
Back Down Relay LED
4
Back Up Relay LED
3
2
1
Figure 5-7. PC Control Board Diagnostoc L.E.D. Locations for Units with Serial Numbers LE-1000
The illustrated parts list provides information for identifying and ordering the parts necessary to maintain the
unit in peak operating condition. Refer to paragraph
1.5 for parts ordering information.
The parts list also illustrates disassembly and assembly
relationships of parts.
6.2 Description of Columns
The
Item
column of the parts list gives a component its
own unique number. The same number is given to the
component in the parts illustration. This allows a part
number of a component to be found if the technician
can visually spot the part on the illustration. The
technician simply finds the component in question on
the illustration and notes the item number of that
component. Then, he finds that item number in the
parts list. The row corresponding to the item number
gives the technician the part number, a description of
the component, and quantity of parts per subassembly.
Also, if a part number is known, the location of that
component can be determined by looking for the item
number of the component on the illustration.
The
Part No.
for that component.
column lists the MIDMARK part number
SECTION VI
PARTS LIST
The
Description
of the component.
The
Qty.
component that is required for the subassembly. The
letters “AR” denote “as required” when quantities of a
particular component cannot be determined, such as:
adhesive.
Bullets { • } in the
column show the indenture level of a component. If a
component does not have a bullet, it is a main component of that illustration. If a component has a bullet, it is
a subcomponent of the next component listed higher in
the parts list than itself that does not have a bullet.
Likewise, if a component has two bullets, it is a subcomponent of the next component listed higher in the
parts list than itself that has only one bullet.
column provides a physical description
column lists the number of units of a particular
Part No.
column and the
Description
6.3 Torque Specifications and Important
Assembly Notes
When specific assembly torque specifications, measurements, or procedures have been identified, by our
engineering department, as required to assure proper
function of the unit, those torque specifications measurements, and procedures will be noted on the parts
illustrations. Adherence to these requirements is
essential.