Safety First: The primary concern of Midmark Corporation is that this
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.
table is maintained with the safety
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 ope rating procedure, practice, or condition which, if not correctly followed,
will 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 ALE RT
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.
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 419 Power Procedure Table unsafe for operation.
WARNING
A WARNING is used for a potentially
hazardous ope rating procedure, practice, or condition which, if not correctly followed,
could result in loss of life or serious personal
injury.
•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 from another manufacturer
when replacing inoperative or damaged components. Use only Midmark replacement parts.
This manual contains detailed troubleshooting, scheduled maintenance, maintenance, service instructions,
and a complete illustrated parts breakdown for the
419 (-003 thru -006) Power Procedure Table. This manual covers both programmable and non-programmable
versions of this table. This manual is intended to be
used by Midmark’s authorized service technicians.
Scope of Manual
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).
1.3Description Of 419 (-003 thru -006)
Power Procedure T able
A. General Description (See Figure 1-1).
The 419 Power Procedure Table is a general purpose
examination table designed specifically for performing
general medical examinations and procedures. The
table is available with or without programming. The programmable versions have additional features such as
programmed positioning, a Home function, and audible
warning signals.
Listed below are descriptions of the models available
and their serial number prefixes:
419-003 (LM) .................115 VAC without programming
419-004 (LN).................. 115 VAC with programming
419-005 (LP) .................. 230 VAC without programming
419-006 (LR).................. 230 VAC with programming
B. Manual Use When Unit Is Malfunctioning And
Cause Is Unknown.
(1) Perform an operational test on unit (Refer to
para 2.1).
(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).
The major serviceable components of the table are:
the tilt actuator, tilt capacitor, back actuator, back capacitor, foot actuator, foot capacitor, base actuator, base
capacitor, base down limit switch, base up limit switch,
PC control board, foot & hand control inlet PC boards,
chain assembly, column assembly, headrest assembly,
non-programmable foot control which includes foot
switches and foot control interface board or a programmable foot control which includes foot switches, a foot
control interface board, indicator L.E.D.’s, and program
control footswitches, and the Foot Extension Crash Protection Circuit which includes the foot actuator limit
switch, foot rest extension limit switch, and base actuator limit switch.
apply to programmable units only:
back position sensor, foot position sensor, and base
reducer assembly which includes base position sensor.
The following serviceable components apply to the
optional hand control:
thru 5-6 for wiring diagram / electrical schematic)
Electrical power
Line voltage is supplied thru two main fuses to the
table’s PC control board. These fuses prevent possible
damage to the PC control board due to excessive current draw. There is a transformer and associated followon 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, foot control, and hand control.
Manual Operation of Tilt, Back, and Foot Actuator
Assemblies:
When a function is selected using the foot control, the
foot control sends a signal to the PC control board. The
signal causes the appropriate relay on the PC control
board to energize (i.e., if the TILT UP button is
depressed on foot control, the Tilt Up relay on PC control board is energized). Line voltage is continuously
supplied to all relays on PC control board. So, when a
relay is energized, the line voltage flows thru the relay
and is applied across the windings of the actuator
motor, causing it to run. When the foot control button is
released, the relay de-energizes, removing the line voltage from the windings of the actuator motor and causing it to stop running.
The Tilt, Back, and Foot 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.
The Tilt, Back, and Foot actuators have internal braking
mechanisms which use friction to hold the actuator in
place. When the actuator is run, the actuator overcomes
the force of the friction, allowing it to move. When actuator is stopped, friction holds the actuator in place.
Manual Operation Of Base Actuator Assembly:
continuously supplied to the relays on PC control board.
So, when the base up or down relay is energized, the
line voltage flows thru the relay and is applied across
the windings of the actuator motor, causing it to run. At
the same time, line voltage flows thru the brake relay
and is applied across the solenoid coil of the base
brake, causing the brake to disengage. When the foot
control button is released, the relays de-energize,
removing line voltage from the coils of the actuator
motor, causing it to stop and at the same time, removing
line voltage from the solenoid coil of the base actuator
brake, causing the base brake to engage.
The base actuator is different from the other three actuators; it does not freewheel at the end of its stroke limit.
This is because the base actuator operates under
heavier loads. To prevent the base actuator from reaching its stroke limits, which could damage the actuator,
two limit switches are used; a base down limit switch
and a base up limit switch. These limit switches are normally closed (N.C.) switches. When the base actuator
reaches the end of the travel (up or down), the appropriate limit switch is tripped, opening the circuit. The PC
control board then de-energizes the motor relay and
base brake relay, causing the base actuator motor to
stop running and the base brake to engage.
Foot Extension Protection Circuit:
To prevent the foot extension from accidentally being
run into the floor, three limit switches are used: the foot
rest extension limit switch, foot actuator limit switch, and
base actuator limit switch. These limit switches are connected in parallel and table functions will operate normally unless
all three
switches are
open
. If all three
limit switch circuits are open, the PC control board will
prevent movement of Tilt Down, Table Down, and Foot
Down functions and illuminate the Foot Rest Extension
lamp on the hand control until any (one or all) of the limit
switches are closed.
The foot rest extension limit switch (located behind the
foot slide weldment) is a normally open (N.O.) switch.
However, when the foot rest extension is in its fully
retracted position, the limit switch is tripped, creating a
closed circuit.
When a BASE UP or BASE DOWN function is selected
using the foot control, the foot control sends a signal to
the PC control board. The signal causes the base up or
down relay, and the base brake relay on the PC control
board to energize (i.e., if the BASE UP button is
depressed on hand control, the base up and base brake
relays on PC control board energize). Line voltage is
The foot actuator limit switch (mounted on the foot actuator) is a normally closed (N.C.) switch. When the foot
section is between -40° and -90°, the limit switch is
tripped, resulting in an open circuit.
Printe d in U.S .A.
SECTIONI
Return To Table Of Contents
GENERALINFORMATION
The base actuator limit switch (mounted on the base
actuator) is a normally closed (N.C.) switch. When the
base actuator is between full down and 1/2 way up, the
limit switch is tripped resulting in an open circuit.
General Information:
All actuator motors have a thermal overload switch
which will activate if the actuator is run continuously and
overheats. The actuator motor is not designed for continuous operation; it is designed for intermittent 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 Time Lag fuses providing overcurrent protection to the input of the PC control board
on the non-programmable table and two 0.15 amp Time
Lag fuses providing over-current protection to the input
of the PC control board on the programmable table.
There is a 5 amp, “Slo-Blo” Time Lag fuse to provide
over-current protection for each function's relays (i.e, Tilt
fuse protects TILT UP and TILT DOWN relays).
C. Program m able Table Theory of Operation (Se e
Figures 5-1 thru 5-6 for wiring diagram / electrical schematic) (Applies only to tables with programmed posit ioning)
Operation Of Programmable Software:
The previous paragraphs have outlined the theory of
operation for manual functions on both the programmable and non-programmable tables. The following paragraphs will describe control system functions on the
programmable tables.
When the table is powered up, the control system initializes the PC control board and then checks for inputs.
There are two functions which can be initiated by the
operator using the foot control; a function to initiate the
“Calibration” mode and a function to initiate the “Clear
Diagnostics Codes” mode. Also, the PC control board
checks if error codes are stored in memory to determine
if the “error” mode should be initiated.
Additionally, there are two functions that may be initiated by depressing switches mounted on the PC control
board; a function to initiate the “Calibration/Clear Data”
mode (SW 2 on PC board) and a function to initiate the
“Program/Fault Clear ” mode (SW 1 on PC board)
The “Calibration” function
be initiated by the tech-
must
nician if a new PC control board or position sensor is
installed, the position sensor is adjusted, the table is not
moving to a programmed position properly, or the table
begins acting erratically. When the calibration mode is
initiated, the PC control board runs all actuators to their
up and down limits and measures the voltage output of
the position sensors at the limits. These voltage values
are stored in the PC control board’s memory and used
as the basis for storing programmed positions into
memory. Also, the error codes for incorrect direction and
no sensor output change are cleared from the PC control board’s memory. If the calibration procedure is not
successful due to a position sensor reading being out of
limits, the error code indicating why will be stored into
the PC control board’s memory along with an error code
indicating the table is not calibrated. The PC control
board emits a 1 second warning beep at 1.5 second
intervals to indicate to the operator that the calibration
procedure is taking place. The calibration procedure is
described in Section IV, Maintenance.
The “Clear Diagnostics Codes” function must be initiated to reset the PC Control Board, after the PC control
board initiates any error code(s). The PC control board
displays the error code(s) by alternately flashing the
PROGRAM lamp and the FOOT REST EXTENSION
lamp to form a code (See Diagnostic code [error code]
operation later in this section). When the table is in the
error code mode, only manual positioning of the table
will work. To resume normal operation, the “Clear Diagnostic Codes” procedure must be completed. If the PC
control board is replaced or the position sensor is
replaced or adjusted, this procedure will not work; in this
case, the “Program/Fault Clear” mode followed by the
Calibration procedure must be performed. This step is
described in the appropriate procedures in Section IV,
Maintenance.
The “Calibration/Clear Data” mode is initiated when it is
desired to clear the PC control board’s memory where
the calibration data is stored. This step is described in
the appropriate procedures in Section IV, Maintenance.
The “Program/Fault Clear” mode is initiated when it is
desired to clear the PC control board’s memory where
the error codes and program position data are stored.
This function should be used if the PC control board
seems locked up or if a position sensor is replaced /
adjusted. The “Program/Fault Clear” function is
described in the appropriate procedures in Section IV,
Maintenance.
When the operator presses the Home position button,
the PC control board lowers the base actuator until the
base down limit switch is tripped. The Home position
button can be pressed and released; it does not have to
be held down to continue movement. If the base down
limit switch is not detected as being tripped (open circuit) within 18 seconds from the time the Home position
button was pressed, the PC control board de-energizes
the base actuator. If Base Up function button is pressed
while the table is moving toward the Home position, the
Home position function is terminated and Base Up is
initiated until button is released.
Stop Function Operation:
When the Stop button is pressed, the PC control board
terminates all functions, stopping table movement.
When the Stop button is released, the stop mode is cancelled and normal table operation may resume.
Program Mode Operation:
The Program Mode is used to allow the operator to program up to four different table top positions into memory. When the Program Mode button is pressed, the
Program Mode function stays active for five seconds, or
until the operator has pressed one of the four Programmed Position buttons, or the Stop button is
pressed. Also, the Program Mode lamp is illuminated
and stays illuminated until the 5 seconds are up or an
action is taken. When a Programmed Position button is
pressed, the PC control board stores the position sensor voltage values for each axis into its memory. Then, if
the position was stored correctly, the PC control board
flashes the Program Mode lamp three times.
Programmed Position Recall Mode:
To recall a program that is stored in memory, the operator selects one of the four Programmed Position Recall
buttons. The button must be pressed and held to continue table movement. The PC control board determines
which direction to run the actuators by comparing the
current position sensor voltage output for each axis with
the voltage values stored in memory for each axis. The
PC control board energizes the relays for the actuators
requiring movement and then monitors the position sensor voltage output for each axis. When the position sensor voltage output of each position sensor matches the
value stored in the PC control board’s memory, the PC
control board de-energizes the actuator relays.
The PC control board has a maximum run time it allows
for each actuator at any one time. This feature prevents
damage to an actuator motor because of an actuator
relay sticking. When a Programmed Position button is
pressed, the PC control board starts a countdown of the
maximum time allowed for that actuator. At the end of
the countdown, if the button is still sensed by the PC
control board as being pressed, and the actuator has
not reached its limit, the PC control board de-energizes
the relay for the actuator. The maximum run time for
each function is:
•Base Up / Base Down - 18 seconds
•Back Up / Back Down - 25 seconds
•Foot Up / Foot Down - 25 seconds
•Tilt Up / Tilt Down - 25 seconds
During the Programmed Position Recall mode, the PC
control board monitors for several error conditions:
If it is detected that a position sensor’s voltage is
increasing when it should be decreasing, decreasing
when it should be increasing, or data input from a position sensor is invalid, the PC control board stops the
table and sets an error code condition. An explanation
of the error codes is given in para 5.2.
If data stored for the Programmed Position Recall button being pressed is invalid, the Program lamp will flash
on and off until the button is released.
If the base down limit switch or base up limit switch is
tripped (open circuit), the PC control board disables the
Programmed Position Recall mode.
If the Foot Extension Crash Protection Circuit is open
(
all three
control board disables the Program Positioning mode
and the Foot Rest Extension lamp will flash on and off
until the button is released.
If the Stop button is pressed, the Programmed Position
Recall mode is disabled.
Manual Positioning Table Operation:
During manual positioning operation, the control system
for the programmable table works like the control system for the non-programmable table except for some
additional controls:
If there is invalid data inputs from any position sensor,
the PC control board still allows manual positioning
operation.
If conflicting functions are attempted such as Base Up
and Base Down, the PC control board disables all functions until all buttons are released.
When the PC control board detects an error condition, it
disables the Home position and Programmed Position
functions. When these buttons are pressed, there is no
movement. By unplugging the table power cord for a
minimum of ten seconds, and then plugging it back in,
the PC control board is put into the “diagnostic code”
mode, described as follows: At power up, if an error
code is stored in memory, the PC control board outputs
the error code to the foot control in the form of a code.
The Program Mode lamp flashes on and then off for the
number of times equal to the first digit of the error code
stored in memory. Then the Foot Extension lamp
flashes on and then off for the number of times equal to
the second digit of the error code stored into memory.
The PC control board then waits one second, repeats
the error code a second time, then waits one second
and repeats the error code a third time. The next error
code is also displayed three times consecutively. This is
repeated until all error codes have been displayed.
Then, the PC control board continuously displays the
error codes on the foot control until a manual function is
selected.
Position Sensor Operation:
There are position sensors mounted to pivot points on
the Back, Tilt, and Foot axis and a position sensor
mechanism (called a base reducer assembly) attached
to the column assembly for the base function. As each
axis moves, the corresponding position sensor’s inner
wheel rotates with the axis. The position sensor is a
variable resistor which changes resistance in a linear
manner when rotated. So when the axis moves, the
position sensor’s voltage output changes, due to its
resistance change, based upon how far the axis has
moved. The PC control board interprets the voltage
value to determine the location of an axis. When a programmed position is programmed by the operator, the
PC control board stores each sensor’s voltage value
into memory. When the operator wishes to return to that
stored position later, the programmed position button for
the desired programmed position is depressed. The PC
control board determines the current position the table
based on the voltage output of the position sensors, and
then determines which axis’ must be moved and in what
direction. The PC control board energizes the relays for
these actuators and moves the table section(s) to the
desired programmed position. The PC control board
stops the actuators when the voltage value of the position sensors matches the values stored in the PC control board’s memory.
1.4Standard Torque Specifications
The following torque specifications in Table 1-1 apply to
the various hardware used on the unit unless otherwise
listed elsewhere in the service procedures or parts illustrations:
Table 1-1. Torque Specifications
Hardware SizeTorque Values
#6 ............................ 11 to 21 inch / lbs. (1.2 to 2.3 N•m)
#8 ............................ 20 to 30 inch / lbs. (2.2 to 3.3 N•m)
#10 .......................... 32 to 42 inch / lbs. (3.6 to 4.8 N•m)
1/4 inch ................... 75 to 85 inch / lbs. (8.5 to 9.6 N•m)
5/16 inch .................18 to 22 ft. / lbs. (24.4 to 29.8 N•m)
3/8 inch ...................31 to 35 ft. / lbs. (42.0 to 47.5 N•m)
1/2 inch ...................50 to 60 ft. / lbs. (67.8 to 81.4 N•m)
1.5Specifications
Factual data for the 419 Power Procedure Table is provided in Table 1-2. Also, see Figure 1-2.
Table 1-2. Specifications
DescriptionData
Weight:
Without Shipping Carton.................515 lbs. (233.6 kg)
With Shipping Carton...................... 550 lbs. (249.5 kg)
Shipping Carton: ..... 54 in. "L" x 32 in. "W" x 33 in. "H"
(137.1 cm x 81.2 cm x 83.8 cm)
Maximum Patient Load: .................. 325 lbs. (147.4 kgs)
Dimensions (See Figure 1-2):
Table Top Length (w/headrest retracted)
(w/back down & foot up) ..............65.0 in. (165.1 cm)
(headrest extended)
Dbl. Articulating Headrest ....... adds 11 in. (27.9 cm)
Triple Articulating Headrest..... adds 15 in. (38.1 cm)
Footrest Extension (adjustable) .... adds 0.0 in to 8.0 in
(0 cm to 20.3 cm)
Table Top Width ...................................23 in. (54.4 cm)
Overall Width .......................................24 in. (61.0 cm)
Table Top Positioning:
Table Top Height ...................... 22 in. to 40 in. ±0.5 in.
(Adjustable)(55.9 +
Back Section ....................... 0° (horizontal) to +85° +
Foot Section......................... 0° (horizontal) to -90° +
Tilt Range...............0° (horizontal) to +30° +
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 unit
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 unit for this information. Otherwise, this
information may be obtained from the dealer that sold
the unit.
SERIAL
NUMBER
Before: (7/26/2002)
MODEL
NUMBER
MA520000
(3) Determine the installation date of the unit 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).
1.7Special Tools
Table 1-3 lists all of the special tools needed to repair
the unit, how to obtain the special tools, and the purose
Figure 1-3. Model Number / Serial Number
After: (7/26/2002)
Location
of each special tool.
Description of Special Tool
Multimeter (with testing hooks) * Commercially AvailableAny TypeUsed to perform continuity and voltage checks.
Protractor *Commercially AvailableAny TypeUsed to check the angle of motion for all movable
T15 Torx WrenchCommercially AvailableAny TypeUsed to loosen / tighten the screws securing the
5/16 in. - 18 x 1-1/4 Bolt
(Quantity of 2)
Torque Wrench *Commercially AvailableAny TypeUsed to tighten nuts or screws to specified values.
Sensor Holder Tool (tool comes
with a position sensor kit).
Manufacturer’s
Name / Address / Phone
Midmark Corporation
60 Vista Drive
Versailles, Ohio 45380
(937) 526-3662
Midmark Corporation
60 Vista Drive
Versailles, Ohio 45380
(937) 526-3662
* Tool should be calibrated annually to ensure proper specifications are met.
Manufacturer’s
Part Number
table top sections.
position sensors, allowing adjustments to be made.
505-702308Used to remove tension from eccentric bearings so
they may be adjusted.
046-0008-00Used to hold the 5/16” hex drive while a position
2.1Operational Test (See Figure 2-1,
Sheets 1 and 2)
In order to effectively diagnose a malfunction of the 419,
it may be necessary to perform an operational test as
follows:
WARNING
Refer to the Operator Manual for com-
plete instructions on operating the
table. Failure to do so could result in personal
injury.
NOTE
The Operational Test 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 properly rated
receptacle.
(2) Using the foot control, operate each table func-
tion (Base Up &Down, Back Up & Down, Tilt Up
& Down, Foot Up & Down)
Range of Motion:
Base down to Base up ......22.38 to 40.38 in.±0.5 in.
(56.8 to 102.5 cm ±1.3 cm)
Back down to Back up........................ 0° to +85° +
Tilt down to Tilt up.............................. 0° to +30° +
Foot down to Foot up ..........................-90° to 0° +
(3) If the table has an optional hand control, repeat
step 2 using the hand control.
(4) Raise foot section to the horizontal position;
then squeeze foot rest extension release handle and pull foot rest extension out as far as it
will go.
(5) Depress BASE UP, and TILT UP buttons on foot
control and hold until each function reaches
maximum height; then depress FOOT DOWN
button and hold until foot section is approximately 1/2 way down.
(6) Depress BASE DOWN, FOOT DOWN, and
TILT DOWN buttons on foot control and hold.
Observe. Table should go approximately 1/2
way down then BASE DOWN, FOOT DOWN,
and TILT DOWN functions should stop and the
Foot Rest Extension lamp on the foot control
should flash.
5°
5°
5°
Observe. When a fucntion is initiated, the table
should move accordingly. No section of the
table top should drift after the foot control pedal
is released. Actuator assembly should not
make excessive squealing noises. Movement
should be steady and should match the speeds
and range of motions listed below:
Table Speeds (@ 60 Hz):
Base down to Base up ......... 18 - 31.5 ±3 seconds
Back down to Back up......................11 ±3 seconds
Tilt down to Tilt up ............................17 ±3 seconds
Foot down to Foot up..........................8 ±3 seconds
foot rest extension inward until it locks into its
stowed position; then depress BASE DOWN,
FOOT DOWN, and TILT DOWN buttons on foot
control and hold.
Observe. Foot Rest Extension lamp on foot
control should go out and all functions should
lower to their minimum heights.
(8) Place approximately 325 lbs. (147.4 kg) of
weight on the seat section of the table top.
(9) Depress BASE UP button on foot control.
Observe. The base actuator should not squeal
or make excessive noise when lifting the
weight. The base actuator should be able to lift
the weight. The base actuator should not hum
or make any other type of noise when the table
top reaches maximum height. The base up limit
SECTION II
Return To Table Of Contents
TESTING AND TROUBLESHOOTING
switch should trip, stopping the base actuator
from running. The base actuator brake should
engage properly and hold the load without drifting down.
(10) Depress BASE DOWN button on foot control.
Observe. The base actuator should not squeal
or make excessive noise when lowering the
weight. The actuator assembly should not hum
or make any other type of noise when the table
top reaches its minimum height. The base down
limit switch should trip, stopping the base actuator from running.
(11) Remove weight from seat section of table top.
(12) Using either the release button (old style), or
release handle (new style) on the headrest,
reposition headrest at each pivot point.
Observe. Headrest should release and move
easily at each pivot point. Headrest should lock
securely into position when button is released
or handle is returned to locked position.
(13) Slide the headrest assembly in and out of the
headrest slide mechanism releasing at various
positions to observe.
Observe. Headrest assembly should not move
out of position on its own, or require excessive
force to be positioned.
(14) Pull outward on arm rest knob and rotate arm
rest 180°.
Observe. Arm rest should rotate freely when
release knob is pulled, and lock securely in
place 180° from point of origin.
Observe. When the HOME POSITION button
is pressed, the table top should begin to lower.
When the STOP button is pressed, the table top
should stop lowering.
(17) Press the HOME POSITION button and allow
the table top to lower completely.
Observe. When the table top is completely low-
ered, the base actuator should stop running
automatically, indicating that the base down
limit switch is tripped.
(18) If the table has an optional hand control, repeat
steps 15 thru 17 using the hand control.
NOTE
After the PROGRAM button is pressed, the operator
has approximately 5 seconds to press one of the four
Program Position buttons. At the end of the 5 seconds, the PROGRAM MODE lamp turns off, indicating that the program mode has ended.
(19) Press the PROGRAM button and then within 5
seconds, press the Program Position “1” button.
Observe. When the PROGRAM button is
pressed, the PROGRAM MODE lamp will illuminate. Then, when the Program Position “1”
button is pressed, the PROGRAM MODE lamp
will go off and then flash three times to indicate
that the table position data was successfully
stored into the PC control board’s memory.
(20) Use any of the foot control buttons to move the
table top to a new position.
(21) Press and hold the Program Position “1” button
until the table stops moving.
NOTE
The remaining steps apply to programmable units
only. Refer to Figure 2-1 (Sheet 2 of 2) for these
steps.
(15) Depress BASE UP button on foot control until
table reaches its maximum height.
(16) Press the HOME POSITION button for one sec-
ond and then release it. After the table top lowers halfway, press the STOP button.
Coil cord is not plugged into
hand control or receptacle
on table properly.
Hand control switch panel is
malfunctioning.
Hand control PC board is
malfunctioning.
determine the cause of the malfunction.
Check to see if power
cord is plugged in.
Check to see if facility circuit breaker for unit is
tripped. One way of
checking this is to plug a
lamp into wall outlet that
table was plugged into.
on fuses.
tions from power cord to
terminal block. Perform
continuity check on
wires. Use multimeter to
check for proper voltage
levels. See Figures 5-1
thru 5-6.
Refer to Figure 2-2 for
this check. Perform continuity check on fuses.
Replace suspect PC control board with known
working PC control
board.
on fuse holder.
Perform continuity check
on AC inlet.
Check if coil cord is
plugged in properly.
Replace suspect hand
control switch panel with
known working hand control switch panel.
Replace suspect hand
control PC board with
known working hand control PC board.
Plug power cord into facility
wall outlet and/or AC receptacle.
If facility circuit breaker is
tripped, determine what
caused the circuit breaker to
trip, correct the problem, and
then reset / replace the circuit
breaker.
Replace blown fuse(s). Refer
to para 5.2.
Clean any dirty connections.
Tighten any loose connections. Replace any damaged
connections.
Replace blown fuse(s). Refer
to para 5.2.
Replace PC control board.
Refer to para 4.3 or 4.4.
Replace fuse holder. Refer to
para 4.33.
Replace AC receptacle. Refer
to para 4.34
Plug coil cord into hand control or receptacle on table.
Clean any dirty connections.
Replace hand control switch
panel. Refer to para 4.20
Replace hand control PC
board. Refer to para 4.20.
One or more functions cannot be initiated from hand
control.
No actions can be initiated
from foot control.
Table 2-1. Troubleshooting Guide - Continued
Table has power, but no
functions can be initiated
from hand control. Foot
control works properly.
- Continued
Some functions may be initiated with hand control,
but at least one may not.
Table has power, but no
functions can be initiated
from foot control. Hand
control works properly.
TESTINGANDTROUBLESHOOTING
Control inlet PC board is
malfunctioning.
Cord running from control
inlet PC board to PC control
board is disconnected or
broken.
PC control board is malfunctioning.
Hand control switch panel is
malfunctioning (switch membrane is malfunctioning).
Hand control PC board is
malfunctioning.
Fuse for non-operating (suspect) function is blown.
Relay for non-operating
(suspect) function is malfunctioning.
Coil cord is not plugged into
foot control or receptacle on
table properly.
Foot control PC board is
malfunctioning.
Control inlet PC board is
malfunctioning.
Plug foot control into suspect control inlet PC
board and check for
proper operation
Check cord to see if it is
properly connected.
Replace suspect cord
with known working cord
or perform continuity
check on cord.
Replace suspect PC control board with known
working PC control
board.
Replace suspect hand
control switch panel with
known working hand control switch panel.
Plug foot control into suspect control inlet PC
board and check for
proper operation
Refer to Figure 2-2 for
this check. Perform continuity check on suspect
fuse.
Refer to Figure 2-2 for
this check. When hand
control button is pressed,
observe relay L.E.D’s on
PC control board. The
L.E.D. for the function
which was selected
should illuminate to indicate that its relay is operating correctly.
Check if coil cord is
plugged in properly.
Plug hand control into
suspect control inlet PC
board and check for
proper operation.
Replace suspect control
inlet PC board with
known working control
PC board.
SECTIONII
If necessary, replace control
inlet PC board. Refer to para
4.19.
Replace cord.
Replace PC control board.
Refer to para 4.3 or 4.4..
Replace hand control switch
panel. Refer to para 4.20.
If necessary, replace hand
control PC board. Refer to
para 4.20.
Replace blown fuse(s). Refer
to para 5.2.
If relay L.E.D. does not illuminate properly, replace PC control board. Refer to para 4.3 or
4.4.
Plug coil cord into foot control
or receptacle on table. Clean
any dirty connections.
Replace foot control PC
board. Refer to para 4.23.
Replace control inlet PC
board. Refer to para 4.19.
BACK UP and BACK
DOWN functions do not
work. All other functions
work.
Table 2-1. Troubleshooting Guide - Continued
Table has power, but no
functions can be initiated
from foot control. Hand
control works properly.
- Continued
Some functions may be initiated with foot control, but
at least one may not.
When BACK UP and
BACK DOWN buttons are
pressed, table will not
move (all other functions
work).
TESTINGANDTROUBLESHOOTING
Cord running from control
inlet PC board to PC control
board is disconnected or
broken.
PC control board is malfunctioning.
A footswitch for a function is
malfunctioning.
Foot control PC board is
malfunctioning.
Fuse for non-operating (suspect) function is blown.
Relay for non-operating
(suspect) function is malfunctioning.
Back capacitor is weak or
blown.
Thermal overload switch in
back actuator motor is activated.
5 amp BACK fuse for BACK
UP and BACK DOWN functions is blown.
Wire connections loose.Check all wiring connec-
Back actuator assembly is
malfunctioning.
Check cord to see if it is
properly connected.
Replace suspect cord
with known working cord
or perform continuity
check on cord.
Replace suspect PC control board with known
working PC control
board.
Perform a continuity
check on footswitch.
Replace suspect foot
control interface board
with known working foot
control interface board.
Refer to Figure 2-2 for
this check. Perform continuity check on suspect
fuse.
Refer to Figure 2-2 for
this check. When a footswitch is depressed,
observe relay L.E.D’s on
PC control board. The
L.E.D. representing the
function which was
selected should illuminate to indicate its relay
is operating correctly.
Replace suspect back
capacitor with known
working back capacitor.
_Wait 10 to 20 minutes to allow
Refer to Figure 2-2 for
this check. Perform a
continuity check on 5
amp BACK fuse.
tions to back actuator
assembly.
Replace suspect back
actuator assembly with
known working back
actuator assembly.
SECTIONII
Replace cord.
Replace PC control board.
Refer to para 4.3 or 4.4.
Replace footswitch. Refer to
para 4.25.
Replace foot control PC
board. Refer to para 4.23.
Replace blown fuse(s). Refer
to para 5.2.
If relay L.E.D. does not illuminate properly, replace PC control board. Refer to para 4.3 or
4.4.
Replace back capacitor. Refer
to para 4.8.
back actuator motor to cool.
Replace blown fuse(s). Refer
to para 5.2.
Clean any dirty connections.
Tighten any loose connections. Replace any damaged
connections.
Replace actuator motor or
back actuator assembly. Refer
to para 4.14 or 4.7.
BACK UP and BACK
DOWN functions do not
work. All other functions
work. - Continued
TILT UP and TILT DOWN
functions do not work. All
other functions work.
TABLE UP and TABLE
DOWN functions do not
work. All other functions
work.
Table 2-1. Troubleshooting Guide - Continued
When BACK UP and
BACK DOWN buttons are
pressed, table will not
move (all other functions
work). - Continued
When TILT UP and TILT
DOWN buttons are
pressed, the table will not
move (all other functions
work).
When TABLE UP and
TABLE DOWN buttons are
pressed, the table will not
move (all other functions
work).
TESTINGANDTROUBLESHOOTING
PC control board is malfunctioning.
Tilt capacitor is weak or
blown.
Thermal overload switch in
tilt actuator is activated.
5 amp TILT fuse for TILT UP
and TILT DOWN functions is
blown.
Wire connections loose.Check all wiring connec-
Tilt actuator assembly is
malfunctioning.
PC control board is malfunctioning.
Base capacitor is weak or
blown.
Thermal overload switch in
base actuator motor is activated.
Refer to Figure 2-2 for
this check. Press BACK
UP and then BACK
DOWN button while
observing the PC control
board. The BACK UP
L.E.D. should illuminate
when the BACK UP button is pressed and the
BACK DOWN L.E.D.
should illuminate when
the BACK DOWN button
is pressed. If, not, the PC
control board is malfunctioning.
Replace suspect tilt
capacitor with known
working tilt capacitor.
_Wait 10 to 20 minutes to allow
Refer to Figure 2-2 for
this check. Perform continuity check on 5 amp
TILT fuse.
tions to tilt actuator
assembly.
Replace suspect tilt actuator assembly with
known working tilt actuator assembly.
Refer to Figure 2-2 for
this check. Press TILT
UP and then TILT DOWN
button while observing
the PC control board.
The TILT UP L.E.D.
should illuminate when
the TILT UP button is
pressed and the TILT
DOWN L.E.D. should illuminate when the TILT
DOWN butt on is press ed.
If not, the PC control
board is malfunctioning.
Replace suspect base
capacitor with known
working base capacitor.
_Wait 10 to 20 minutes to allow
SECTIONII
Replace PC control board.
Refer to para 4.3 or 4.4.
Replace tilt capacitor. Refer to
para 4.6.
tilt actuator motor to cool.
Replace blown fuse(s). Refer
to para 5.2.
Clean any dirty connections.
Tighten any loose connections. Replace any damaged
connections.
Replace actuator motor or tilt
actuator assembly. Refer to
para 4.14 or 4.5.
Replace PC control board.
Refer to para 4.3 or 4.4.
TABLE UP and TABLE
DOWN functions do not
work. All other functions
work. - Continued
FOOT UP and FOOT
DOWN functions do not
work. All other functions
work.
Table 2-1. Troubleshooting Guide - Continued
When TABLE UP and
TABLE DOWN buttons are
pressed, the table will not
move (all other functions
work). - Continued
When FOOT UP and
FOOT DOWN buttons are
pressed, the table will not
move (all other functions
work).
TESTINGANDTROUBLESHOOTING
5 amp BRAKE/ BASE fuse
for TABLE UP, TABLE
DOWN, and base brake
functions is blown.
Wire connections loose.Check all wiring connec-
Base actuator assembly is
malfunctioning.
PC control board is malfunctioning.
Brake on base actuator is
malfunctioning.
Foot capacitor is weak or
blown.
Thermal overload switch in
foot actuator is activated.
5 amp FOOT fuse for FOOT
UP and FOOT DOWN functions is blown.
Wire connections loose.Check all wiring connec-
Foot actuator assembly is
malfunctioning.
Refer to Figure 2-2 for
this check. Perform continuity check on 5 amp
BRAKE/BASE fuse.
tions to base actuator
assembly and base
brake solenoid.
Replace suspect base
actuator assembly with
known working base
actuator assembly.
Refer to Figure 2-2 for
this check. Press TABLE
UP and then TABLE
DOWN button while
observing the PC control
board. The TABLE UP
L.E.D. and BRAKE/BASE
L.E.D. should illuminate
when the TABLE UP button is pressed and the
TABLE DOWN L.E.D.
and the BRAKE/BASE
L.E.D. should illuminate
when the TABLE DOWN
button is pressed. If not,
the PC control board is
malfunctioning.
_Replace base actuator. Refer
Replace suspect foot
capacitor with known
working foot capacitor.
_Wait 10 to 20 minutes to allow
Refer to Figure 2-2 for
this check. Perform continuity check on 5 amp
FOOT fuse.
tions to foot actuator
assembly.
Replace suspect foot
actuator assembly with
known working foot actuator assembly.
SECTIONII
Replace blown fuse(s). Refer
to para 5.2.
Clean any dirty connections.
Tighten any loose connections. Replace any damaged
connections.
Replace base actuator assembly. Refer to para 4.11.
Replace PC control board.
Refer to para 4.3 or 4.4.
to para 4.11.
Replace foot capacitor. Refer
to para 4.10.
foot actuator motor to cool.
Replace blown fuse(s). Refer
to para 5.2.
Clean any dirty connections.
Tighten any loose connections. Replace any damaged
connections.
Replace actuator motor or foot
actuator assembly. Refer to
para 4.14 or 4.9.
FOOT UP and FOOT
DOWN functions do not
work. All other functions
work. - Continued
BACK UP function works,
but BACK DOWN function
does not or BACK DOWN
function works, but BACK
UP function does not. All
other functions work.
TILT UP function works but
TILT DOWN function does
not or TILT DOWN function
works, but TILT UP function does not. A ll other
functions work.
Table 2-1. Troubleshooting Guide - Continued
When FOOT UP and
FOOT DOWN buttons are
pressed, the table will not
move (all other functions
work). - Continued
One function operates
properly, but the other
does not.
One function operates
properly, but the other
does not.
TESTINGANDTROUBLESHOOTING
PC control board is malfunctioning.
Wire connections loose.Check all wiring connec-
Back actuator assembly is
malfunctioning.
PC control board is malfunctioning (relay for up or down
function is malfunctioning).
Hand control switch panel of
hand control is malfunctioning (switch membrane is
malfunctioning).
BACK UP or BACK DOWN
footswitch is malfunctioning.
Wire connections loose.Check all wiring connec-
Tilt actuator assembly is
malfunctioning.
Refer to Figure 2-2 for
this check. Press FOOT
UP and then FOOT
DOWN button while
observing the PC control
board. The FOOT UP
L.E.D. should illuminate
when the FOOT UP button is pressed and the
FOOT DOWN L.E.D.
should illuminate when
the FOOT DOWN button
is pressed. If not, the PC
control board is malfunctioning.
tions to back actuator
assembly.
Replace suspect back
actuator assembly with
known working back
actuator assembly.
Refer to Figure 2-2 for
this check. Press BACK
UP and then BACK
DOWN button while
observing the PC control
board. The BACK UP
L.E.D. should illuminate
when the BACK UP button is pressed and the
BACK DOWN L.E.D.
should illuminate when
the BACK DOWN button
is pressed. If not, the PC
control board is malfunctioning.
Replace suspect hand
control switch panel with
known working hand control switch panel.
Perform a continuity
check on suspect foot
switch.
tions to tilt actuator
assembly.
Replace suspect tilt actuator assembly with
known working tilt actuator assembly.
SECTIONII
Replace PC control board.
Refer to para 4.3 or 4.4.
Clean any dirty connections.
Tighten any loose connections. Replace any damaged
connections.
Replace actuator motor or
back actuator assembly. Refer
to para 4.14 or 4.7.
Replace PC control board.
Refer to para 4.3 or 4.4.
Replace hand control switch
panel. Refer to para 4.20.
Replace footswitch. Refer to
para 4.25.
Clean any dirty connections.
Tighten any loose connections. Replace any damaged
connections.
Replace actuator motor or tilt
actuator assembly. Refer to
para 4.14 or 4.5.
TILT UP function works but
TILT DOWN function does
not or TILT DOWN function
works, but TILT UP function does not. All other
functions work.
- Continued
TABLE UP function works,
but TABLE DOWN function does not or TABLE
DOWN function works, but
TABLE UP function does
not. All other functions
work.
Table 2-1. Troubleshooting Guide - Continued
One function operates
properly, but the other
does not. - Continued
One function operates
properly, but the other
does not.
TESTINGANDTROUBLESHOOTING
PC control board is malfunctioning (relay for up or down
function is malfunctioning).
Hand control switch panel of
hand control is malfunctioning (switch membrane is
malfunctioning).
TILT UP or TILT DOWN footswitch is malfunctioning.
Wire connections loose.Check all wiring connec-
Either base down limit switch
or base up limit switch is
malfunctioning.
Base actuator assembly is
malfunctioning.
PC control board is malfunctioning (relay for up or down
function is malfunctioning).
Hand control switch panel of
hand control is malfunctioning (switch membrane is
malfunctioning).
Refer to Figure 2-2 for
this check. Press TILT
UP and then TILT DOWN
button while observing
the PC control board.
The TILT UP L.E.D.
should illuminate when
the TILT UP button is
pressed and the TILT
DOWN L.E.D. should illuminate when the TILT
DOWN butt on is press ed.
If not, the PC control
board is malfunctioning.
Replace suspect hand
control switch panel with
known working hand control switch panel.
Perform a continuity
check on suspect footswitch.
Replace suspect base
actuator assembly with
known working base
actuator assembly.
Refer to Figure 2-2 for
this check. Press TABLE
UP and then TABLE
DOWN button while
observing the PC control
board. The TABLE UP
L.E.D. and BRAKE/BASE
L.E.D. should illuminate
when the TABLE UP button is pressed and the
TABLE DOWN L.E.D.
and the BRAKE/BASE
L.E.D. should illuminate
when the TABLE DOWN
button is pressed. If not,
the PC control board is
malfunctioning.
Replace suspect hand
control switch panel with
known working hand control panel.
SECTIONII
Replace PC control board.
Refer to para 4.3 or 4.4.
Replace hand control switch
panel. Refer to para 4.20.
Replace footswitch. Refer to
para 4.25.
Clean any dirty connections.
Tighten any loose connections. Replace any damaged
connections.
Replace base up limit switch
(Refer to para 4.16) or base
down limit switch (Refer to
para 4.15).
Replace base actuator assembly. Refer to para 4.11.
Replace PC control board.
Refer to para 4.3 or 4.4.
Replace hand control switch
panel. Refer to para 4.20.
TABLE UP function works,
but TABLE DOWN function does not or TABLE
DOWN function works, but
TABLE UP function does
not. All other functions
work. - Continued
FOOT UP function works,
but FOOT DOWN function
does not or FOOT DOWN
function works, but FOOT
UP function does not. All
other functions work.
TA B L E D OW N, FO OT
DOWN, AND TILT DOWN
functions do not work. All
other functions work.
Table 2-1. Troubleshooting Guide - Continued
One function operates
properly, but the other
does not. - Continued
One function operates
properly, but the other
does not.
When TABLE DOWN,
FOOT DOWN, or TILT
DOWN buttons are
pressed, the table will not
move (all other functions
work). Foot Extension lam p
on hand control illuminates.
TESTINGANDTROUBLESHOOTING
TABLE UP or TABLE DOWN
footswitch is malfunctioning.
Wire connections loose.Check all wiring connec-
Foot actuator assembly is
malfunctioning.
PC control board is malfunctioning (relay for up or down
function is malfunctioning).
Hand control switch panel of
hand control is malfunctioning (switch membrane is
malfunctioning).
FOOT UP or FOOT DOWN
footswitch is malfunctioning.
Perform a continuity
check on suspect footswitch.
tions to foot actuator
assembly.
Replace suspect foot
actuator assembly with
known working foot actuator assembly.
Refer to Figure 2-2 for
this check. Press FOOT
UP and then FOOT
DOWN button while
observing the PC control
board. The FOOT UP
L.E.D. should illuminate
when the FOOT UP button is pressed and the
FOOT DOWN L.E.D.
should illuminate when
the FOOT DOWN button
is pressed. If not, the PC
control board is malfunctioning.
Replace suspect hand
control switch panel with
known working hand control switch panel.
Perform a continuity
check on suspect footswitch.
Check that foot rest
extension is pushed in all
the way.
Perform continuity check
on limit switches.
Replace suspect PC
board with known working PC board.
SECTIONII
Replace footswitch. Refer to
para 4.25.
Clean any dirty connections.
Tighten any loose connections. Replace any damaged
connections.
Replace actuator motor or foot
actuator assembly. Refer to
para 4.14 or 4.9.
Replace PC control board.
Refer to para 4.3 or 4.4.
Replace hand control switch
panel. Refer to para 4.20.
Replace footswitch. Refer to
para 4.25.
Push foot rest extension in all
the way.
Replace limit switch(es). Refer
to para 4.31, 4.32, or 4.33.
Stop pins in headrest joints
not creating a positive lock
due to weak spring, dir t, or
wear of components.
assembly with known
working actuator assembly.
Replace suspect base
actuator with known
working base actuator.
Check voltage at wall
receptacle - should be:
Applies to 419 (-003 &
-004) only:
115 ±10% VAC
Applies to 419 (-005 &
-006) only:
230 ±10% VAC
Maximum weight capacity of table is 325 lbs
(147.4 kg).
Replace suspect capacitor with known working
capacitor.
Che ck fo r forei gn mat ter
on ball screw threads.
Check for lack of lubricant on ball screw
threads.
Check for loose eccentric
bearing(s) and check tension of chain assemblies.
Check condition of base
slide assembly.
Check to verify all four
leveling screws are contacting the floor.
Replace back slide bearing(s).
Check for dirt in mechanism. Check for weak
spring or damaged components.
Check adjustment of
headrest slide mechanism.
Check adjustment of
headrest slide mechanism.
Check for weak springs
or dirt. Also check for
worn components such
as a mushroomed stop
pin or pin stop block.
SECTIONII
Replace actuator assembly.
Refer to para 4.5, 4.7, 4.9, or
4.11..
Replace base actuator. Refer
to para 4.11.
Correct low voltage situation
at wall receptacle.
Inform table operator of weight
limitation.
Replace capacitor.
Clean all foreign matter off of
ball screw threads. Coat ball
screw threads with STP treatment oil or equivalent. If actuator assembly is still noisy,
replace it.
Adjust eccentric bearing(s) or
adjust tension of chain assembly. Refer to para 4.17.
Replace base slide assembly.
Refer to para 18.
Adjust the leveling screws;
there is one located under
each corner of the base.
Replace back slide bearing(s).
Refer to para 4.30.
Clean mechanism. If necessary, replace weak spring, or
damaged components. Refer
to para 4.29.
Adjust headrest slide mechanism. Refer to para 4.28.
Adjust headrest slide mechanism. Refer to para 4.28.
Clean headrest components.
Replace any worn or damaged
componets. Lubricate components with a silicone based
lubricant. Refer to para 4.27.
The Troubleshooting Guide entries belo w apply onl y to the programmable tables (419 -004 and 419-006)
HOME POSITION function does not operate properly. All other functions
work.
Table cannot be programmed or moved to previously programmed
position.
Table 2-1. Troubleshooting Guide - Continued
Nothing happens when the
HOME POSITION button
is pressed.
When HOME POSITION
button is pressed, the base
actuator continues to run/
hum when the table top is
completely lowered (for
approximately another 7 10 seconds).
When operator attempts to
store a position into the PC
control board’s memory, it
is not successful.
TESTINGANDTROUBLESHOOTING
Hand control switch panel of
hand control is malfunctioning (switch membrane is
malfunctioning).
HOME POSITION footswitch
is malfunctioning.
Base down limit switch is
tripped.
Base down limit switch is
malfunctioning - stuck
closed.
Base actuator is running so
slow that the minimum table
top height is not reached
before the 18 second time
limit stops the base actuator.
Base down limit switch is
malfunctioning (stuck
closed).
Base down limit switch is out
of adjustment.
Incorrect steps taken for
entry of position.
Hand control switch panel of
hand control is malfunctioning (a switch membrane is
malfunctioning).
Pos iti on “1”, “2”, “3”, “4”, or
PROGRAM footswitch is
malfunctioning.
PC control board cannot
read a position sensor correctly, resulting in an error
code.
PC control board is malfunctioning.
PC control board needs calibrated.
Replace suspect hand
control switch panel with
known working hand control switch panel.
Perform continuity check
on HOME POSITION
footswitch.
Table top is already lowered all the way down,
tripping limit switch.
Perform continuity check
on base down limit switch
(limit switch is N.C. when
not tripped).
Replace the base actuator and / or base capacitor with known working
components.
Perform continuity check
on N.C. base down limit
switch (tripped = open).
Check adjustment of
base down limit switch.
Refer to the Operator’s
manual for proper procedure.
Replace suspect hand
control switch panel with
known working hand control switch panel.
Perform continuity check
on suspect footswitch.
Unplug table for at least
ten seconds, plug table
back in, and then look for
presence of error codes.
Replace suspect PC control board with known
working PC control
board.
_Perform calibration of PC con-
SECTIONII
Replace hand control switch
panel. Refer to para 4.20.
Replace footswitch. Refer to
para 4.25.
Inform operator of minimum
height of table.
Replace base down limit
switch. Refer to para 4.15.
Replace base capacitor. Refer
to para 4.12. If this does not
correct the problem, replace
the base actuator. Refer to
para 4.11.
Replace base down limit
switch. Refer to para 4.15.
Because the base actuator
does not freewheel, it may
have been damaged. Check
and replace if necessary.
Refer to para 4.11.
Adjust base down limit switch.
Refer to para 4.15.
Refer the operator to the
Operator’s manual for proper
procedure.
Replace hand control switch
panel. Refer to para 4.20.
Replace footswitch. Refer to
para 4.25.
If error codes are displayed on
hand control, use error code
chart in Table 5-2 to determine
cause of error or see below in
this Troubleshooting Guide.
Replace PC control board.
Refer to para 4.3 or 4.4.
The position sensor for the
suspect function is out of
adjustment; the position sensor travels past its limit and
enters a “dead spot” (a dead
spot is where the voltage
output of the sensor does
not change even when its
associated function is moving).
Check if the Foot Rest
Extension lamp is flashing; will flash as long as a
Position button remains
pressed and foot extension is not stowed.
Check if the PROGRAM
MODE lamp is flashing; it
will flash when a Program Position button is
pressed which does not
have a valid table position stored into its memory.
Unplug table, plug table
back in, and then
observe hand control for
presence of error codes.
Replace suspect PC control board with known
working PC control
board.
Replace suspect hand
control switch panel with
known working hand control switch panel.
Perform continuity check
on suspect footswitch.
Check continuity of Foot
Section Crash Protection
Circuit limit switches.
Run the function to one
of its limits and connect a
multimeter to the Test
Points for the suspect
position sensor (Refer to
para 4.37, 4.38, 4.39, or
4.40). Then, press a
button for 1/10 second
and observe multimeter
reading to see if it has
changed. If it hasn’t, the
position sensor is in a
dead spot and must be
readjusted. Repeat for
functions other limit.
Check continuity of Foot
Extension Protection Circuit limit switches.
SECTIONII
Push foot extension in all the
way.
Inform the operator of the
proper procedure for programming a table top position into
memory for a Position button.
If error codes are displayed on
hand control, use error code
chart in Table 5-2 to determine
cause of error.
Replace PC control board.
Refer to para 4.3 or 4.4.
Replace hand control switch
panel. Refer to para 4.20.
Replace footswitch. Refer to
para 4.25.
Replace limit switch(es). Refer
to para 4.31, 4.32, and/or
4.33.
Adjust the position sensor for
the suspect function. If the
adjustment is not successful,
replace the position sensor.
Refer to para 4.37, 4.38, 4.39,
and/or 4.40.
Replace limit switch(es). Refer
to para 4.31, 4.32, and/or
When Programmed Position button “1”, “2”, “3”, or
“4” is pressed, nothing
happens. All other functions work properly.
Table 2-1. Troubleshooting Guide - Continued
When table is unplugged
(for at least ten seconds)
and then plugged back in,
error code 11
ibration not completed due
to error condition) is displayed on foot/hand control. See Table 5-2 for
explanation of error codes
and how to read them.
When table is unplugged
(for at least ten seconds)
and then plugged back in,
error code 12
received from foot/hand) is
displayed on foot control.
See Table 5-2 for explanation of error codes and how
to read them.
When table is unplugged
(for at least ten seconds)
and then plugged back in,
error code 21
tion sensor output voltage
did not change when
expected during a position
recall) is displayed on foot/
hand control. See Table 52 for explanation of error
codes and how to read
them.
(system cal-
(invalid data
(base posi-
TESTINGANDTROUBLESHOOTING
The PC control board has
detected an error condition
such as Foot Section Crash
Protection Circuit is open,
STOP button was pressed,
etc., which has prevented
the system calibration routine from completing successfully.
The PC control board has
detected a problem with the
foot/hand control.
PC control board is malfunctioning.
Base position sensor is out
of adjustment or bolt head to
which position sensor is
attached is loose and is not
rotating properly.
Base position sensor is malfunctioning.
Base reducer assembly is
malfunctioning.
Wiring connections are dirty,
torn, or loose.
_Perform a new system calibra-
Check the foot control
interface board and hand
control PC board.
Replace PC control
board with known working PC control board.
Check to see if base
position sensor is
adjusted correctly or if
bolt is loose.
Replace base position
sensor with known working base position sensor.
Check to see if the base
reducer assembly is set
up and operating properly.
Check all wiring connections from base position
sensor and PC control
board.
SECTIONII
tion. Refer to para 4.2.
Replace foot control PC board
(Refer to para 4.23) or hand
control PC board (Refer to
para 4.20).
Replace PC control board.
Refer to para 4.3 or 4.4.
Adjust the base position sensor. Refer to para 4.40.
Replace base position sensor. Refer to para 4.40.
Repair the base reducer
assembly. Refer to para 4.40.
Clean any dirty connections.
Tighten any loose connections. Replace any damaged
connections.