Mitsubishi Electric JT-SB116JH2-S-NA User manual

Warning:
Repair work must be performed by the manufacturer, its service
agent or a similarly qualified person in order to avoid hazards.
HAND DRYER
HANDBOOK
MODELS
JT-SB116JH2-S-NA
JT-SB116JH2-W-NA
April 2017 No. U219-A
Nameplate

Contents
1. Safety precautions .................................................................... 3-4
2. Features ....................................................................................... 4
3. Improved points............................................................................ 4
4. Names of components ................................................................ 5
5. Specifications .............................................................................. 5
6. Outside dimensions
..................................................................... 6
7. Electrical wiring diagram ............................................................. 6
8. Circuit board diagrams .............................................................. 7-9
9. Principles of operation ............................................................... 10
10. Troubleshooting......................................................................11-14
11. Before receiving repair requests ................................................ 15
12. Service inspection list................................................................. 15
13. Overhauling procedures ........................................................ 16-25
14. Parts catalog ......................................................................... 26-42
JT-SB116JH2-S-NA ........................................................ 27-34
JT-SB116JH2-W-NA ....................................................... 35-42

─3 ─
Read the following precautions thoroughly before the maintenance, and then inspect and repair the product in a
safe manner.
The types and levels of danger that may arise if the product is handled incorrectly are described with the warning
symbols shown below.
Warning
Modification is prohibited
Do not modify the unit.
(Failure to heed this warning may result
in electric shock, fire and/or injury.)
Electric shock
If you must inspect the circuitry while the power is
on, do not touch the live parts.
(Failure to heed this warning may result
in electric shock.)
Check insulation
Upon completing repair work, always measure the
insulation resistance. Verify that it is at least 10 MΩ
(with a 500-V DC insulation resistance tester), and
then turn on the power.
(Inadequate insulation may result in
electric shock.)
Incorrect handling of the product may
result in serious injury or death.
Caution Incorrect handling of the product may result in injury or
damage to properties including buildings and equipment.
Proper electric work
• Use the electric wires designated for electric work,
and conduct electric work in accordance with the
"Electric Installation Engineering Standard", the
"Indoor Wiring Regulations" and the installation
instructions.
• Make sure that the terminals and fixed wiring are
securely connected.
(Improper connection or wiring installation
may result in electric shock and/or fire.)
Use proper parts and tools
For repair, be sure to use the parts listed in the
service parts catalog of the applicable model and
use the proper tools.
(Failure to heed this warning may result in
electric shock, fire and/or injury.)
Caution against
electric shock
Prohibited
Be sure to follow
this instruction.
Turn off the power
Make sure to turn off the circuit breaker prior to
starting repair work. (The charge voltage in the
circuitry remains for another 90 seconds or so,
even after the power is turned off and the LED is
unlit; therefore, wait for at least 90 seconds before
disassembling the product.)
(Failure to heed this warning may result
in electric shock.)
Be sure to follow
this instruction.
Wear gloves
Always wear a pair of gloves during inspection or
repair work.
(Failure to heed this caution may result in
injury.)
1. Safety precautions
Be sure to follow
this instruction.
Be sure to follow
this instruction.
Be sure to follow
this instruction.
Scratches and deterioration
Make sure to replace scratched and/or deteriorated
wiring and lead wires.
(Failure to heed this warning may result
in electric shock and/or fire.)
Be sure to follow
this instruction.

─4 ─
2. Features
• Wide hand drying area: easy-to-use for people with big hands
• Child sensor: easy-to-use for children
• Cleanable drain ditch
• Exteriors can be cleaned by wiping with alcohol.
• The square design matches various lavatories.
3. Improved points
Item
Previous model New model
JT-SB116JH-G-NA
JT-SB116JH-W-NA
(With a simple heater)
JT-SB116JH2-S-NA
JT-SB116JH2-W-NA
(With a simple heater)
Appearance
Noise (dB) 61 59
Others The maintenance switch is provided
behind the service panel (switch door).
The maintenance switch and service
panel (switch door) are not provided.
Make sure that the product operates properly upon completion of repair. Clean the product and the surrounding
area, and then notify the customer of the completion of repair.
Notes for servicing
●Before repairs, take the product off the wall.
●Inspect the grounding condition, and repair it if it is incomplete. Make sure that a circuit breaker or an overload
protection device is installed, if it is not installed, recommend the customer to install one.
●Check whether the air filter, side cover, and the drain tank are installed securely in place.
●Do not leave a towel or other objects in the hand-drying area.
●Never place any objects on the main body nor cover it.
●Make sure that the product is not being used in any of the following locations:
• Outdoors
• Locations where the temperature could be lower than 50°F (10ºC)
• Locations where the temperature could be higher than 104°F (40ºC)
• Locations where there is a lot of dust
• Locations where there is a lot of condensation
• Locations where salt damage could occur
• In vehicles (including ships and airplanes)
• Locations where corrosive, neutral, or reductive gases are present (This may shorten the working life of the
unit and/or cause malfunctions.)
• Near food or tableware
• Kitchens
(Where there is a risk of water splashing)
• Locations where the product may come into direct contact with water
• Locations where the product is in direct sunlight or strong light (It may cause sensor malfunction)
• Near bathtubs, showers, or swimming pools

─5 ─
4. Names of components
Hand drying area
Black wall area blue indicator
Main unit
The blue indicator does not have a sterilizing effect.
Do not look directly into the blue indicator.
Drain tank
Side cover Front panel
Tank cover
$LU¿lter
Display
Power lamp
Heater lamp
Sensor
Settings
HEATER
AIR SPEED
HEATER
OFF / ON
STANDARD / HIGH
AIR SPEED
OFF
HIGH
ON
STANDARD
Switches
※Factory default settings
*Shaded areas in the figure indicate antibacterial material.
5. Specifications
Model
Rated
voltage
(Vac)
Rated
frequency
(Hz)
Rated
current
(A)
Air
speed
setting
Power consumption
(W) Air
speed
(m/h)
Noise
(dB(A)) Weight Drain tank capacity
Heater
ON
Heater
OFF
JT-SB116JH2-S-NA
JT-SB116JH2-W-NA 120 60 11.4 HIGH 1250 730 235 59 26.5 lbs (12 kg)
1.7 pt
(0.8 ℓ)
STANDARD 1090 570 215 56
• Air speed is calculated from the static pressure measured by the pitot tube (at the nozzle).
• Sound is the A range value measured in an anechoic room. (Average of the three points: 78 3/4" (2 m) from the
front and both sides of the unit.)
• The heater is turned off automatically when ambient temperature reaches 86°F (30°C).
• Compliance: Conforms to ANSI/UL Std. UL499
Certified to CAN/CSA Standard C22.2 No. 36

─6 ─
6. Outside dimensions
JT-SB116JH2-S-NA, JT-SB116JH2-W-NA
Unit: Inches (mm)
7. Electrical wiring diagram
JT-SB116JH2-S-NA, JT-SB116JH2-W-NA
JT-34F
JT-34P1H
8
HEATER
AIR SPEED
OFF ON
STANDARD HIGH
JT-30M10/10A
JT-30S5R
JT-30S3R
JT-30S2R
JT-30S2R
JT-30S1R
HEATER
REACTOR
GROUND
MOTOR
BLOWER
Blue Black Blue Red White Black
White
Orange Orange
Thermal fuse 1
Thermal fuse 3
Thermal
fuse 2
Power
supply
120 V AC
60 Hz
Terminal block
CN19
CN12
CN15
CN15
CN11
CN21
CN18
CN7
CN8
CN5
(Red)
(White)
(Red)
TAB4
TAB5 TAB6 TAB7 TAB8 TAB9
TAB1 TAB2
TAB3
CN4 (Red) CN2 (Black)
TAB22
TAB23
TAB20
TAB21
CN31 CN30
FUSE3 250V-3.15A
FUSE2 250V-25A
FUSE1 250V-25A
/receiving circuit board
Sensor board
Sensor board
Sensor board
Display circuit board
Sensor light-emitting
94°C
121°C
94°C

─7 ─
8. Circuit board diagrams
Circuit board diagrams and check points
1Power circuit board (JT-34P1H)
Non-insulated power supply
5 V
(CN2 2P)
Non-insulated power supply
15 V
(CN2 1P)
Non-insulated power supply
0 V
(CN2 3P)
Reset input 5 V
(IC1 18P)
Carrier frequency 15 kHz
(IC1 8P)
Heater power supply: 120 V AC (With heater ON)
(Between TAB3 and TAB4)
Bus voltage (Being stopped): 170 V DC
(Between TAB5 and 0 V or between TAB6 and 0 V)
Clock frequency 12 MHz
(IC1 19P)
Power supply voltage: 120 V AC
(Between TAB1 and TAB2)

─8 ─
Non-insulated power supply
5 V
(CN30 1P)
Insulated power supply
15 V
(CN31 2P)
Non-insulated power supply
0 V
(CN30 2P)
Power supply voltage: 120 V AC
(Between TAB20 and TAB21)
Insulated power supply
5 V
(CN31 3P)
Insulated power supply
0 V
(CN31 4P)
2Filter circuit board (JT-34F)
Clock frequency 8 MHz
(IC20 14P)
Reset input 5 V
(IC20 11P)
5 V
(CN18 1P)
15 V
(CN8 2P)
0 V
(CN8 7P)
3Control circuit board
(JT-30M10 [JT-SB116JH2-S-NA] /JT-30M10A [JT-SB116JH2-W-NA])
Circuit thermostat characteristics
(IC20 5P)
Temperature Resistance IC20 5P Voltage
68°F (20ºC) 59.3 kΩ3.44 V
86°F (30ºC) 37.6 kΩ2.91 V
104°F (40ºC) 24.5 kΩ2.38 V

─9 ─
4Light receiving circuit board (JT-30S1R) (Upper sensor)
5Sensor circuit board (JT-30S2R) (Middle sensor)
6Sensor circuit board (JT-30S3R) (Lower sensor)
7Display circuit board (JT-30S5R)

─10 ─
9. Principles of operation
Descriptions of circuit operation
(1) Notes for turning the circuit breaker “ON / OFF”
1When the circuit breaker is turned “ON” and the power is supplied to the product, the power lamp (LED1),
the heater lamp (LED2) (with the heater switch ON), and blue indicators (LED10, 11) turn on after 1.5 sec-
onds(*1), and the hand dryer becomes ready for operation.
• Before the power lamp turns on, the hand dryer will not operate even if hands are inserted in the hand dry-
ing area. In the meantime, the microcomputer (IC20) of the main unit performs the initial settings, includ-
ing the setting of the hand detection sensor sensitivity.
• In order to set the sensitivity of the hand detection sensor correctly, do not insert hands in the hand drying
area until the power lamp is turned on.
• Even if the hand dryer has started immediately (within 15 seconds or less) after turning the circuit breaker
“ON”, it is normal though the motor input may become slightly lower due to the initial setting.
*1: If the circuit breaker is turned ON again 30 to 120 seconds after turning the circuit breaker OFF, it may
take 3 seconds before the operation is enabled.
2When the circuit breaker is turned “OFF”, the power lamp and blue indicators turn off and operation stops.
• The circuitry takes about 50 seconds to discharge the voltage retained in it. Wait until the discharging time
elapses before plugging in or out the connectors, replacing the circuit boards, or doing other maintenance.
• Even when any error is occurred, the error display will go off if the circuit breaker has been turned off.
Only when a microcomputer error is occurred, the error display persists till the voltage retained in the
circuitry has been discharged (till the microcomputer has been reset).
(2) Hand detection and operation
1 The hand detection sensors are infrared sensors containing the light emitting sensor (infrared LED) and light
receiving sensor (photo-diode), etc. and consist of the upper sensor, the middle sensors, and the lower sensor.
2Reflection type upper sensor:
This sensor detects the change in the reflected amount of infrared light when hands are inserted.
Transmission type middle and lower sensors:
These sensors detect that the infrared light is shielded when hands are inserted.
3When the lower or middle sensors detect hands, the blower motor turns on and the hand dryer starts to
operate.
4
Once operation has started, it continues as long as any of the upper, middle, or lower sensors detects hands.
5If 1.5 to 3 seconds elapse without detecting hands by any of the sensors, the blower motor turns off and
operation stops.
6The hand dryer continuously operates for up to 30 seconds.
• Once 30 seconds have elapsed, the hand dryer stops operating even if hands are detected.
• Since this is a function to assume the presence of a foreign object, the operation will resume if hands are
pulled out and reinserted.
(3) Control of the heater
1The heater turns ON simultaneously with the blower motor turns ON. (The heater lamp turns on.)
2The heater does not turn ON in the following occasions:
• When the heater switch is turned “OFF”
•
When a temperature detected by the circuit thermostat on the control circuit board (JT-30M10/JT-30M10A)
is 89.6°F (32°C) or higher

─11 ─
10. Troubleshooting
Work precautions
• When servicing, reproduce the malfunction two or three times before starting repairs.
• When servicing, always take care to keep proper footing.
• Before starting the service, always unplug the power cord from the outlet, or turn off the circuit breaker when
no power cord plug is provided. Sufficient care must be taken to avoid electric shock or injury.
• Make sure to connect the power supply wires correctly.
• When removing the circuit board, always hold it at both ends and remove carefully so as not to apply force
to the surface mounted parts.
• When removing the circuit board, be careful of the metal edges on the board.
• When removing or inserting the connectors for the circuit board, hold the entire housing section. Never pull
on the lead wires.
• When circuit board failure is considered to be a cause, check closely for any broken section on the copper
foil patterns, burning or discoloration of parts.
• After replacing a circuit board, make sure to restore the same settings as before the replacement.
The part names in the text are standardized with the part names in the parts catalog. (There are some
exceptions.)
Purpose Device
Overcurrent protection Current fuse
Protection against an excessive
temperature rise of the heater parts
Thermal fuse
Protection against an excessive
temperature rise of the blower parts
Thermal fuse
Motor lock protection • Current detection circuit
(Detects abnormal current caused by the motor lock, and stops the
power to the motor.)
• Current fuse
(1) Table of the safety devices
Model name of the circuit boards
JT-SB116JH2-S-NA JT-SB116JH2-W-NA
Power circuit board JT-34P1H
Filter circuit board JT-34F
Control circuit board JT-30M10 JT-30M10A
Light receiving circuit board JT-30S1R
Sensor circuit board JT-30S2R
Sensor circuit board JT-30S3R
Display circuit board JT-30S5R
(2) Troubleshooting

─12 ─
Error Mode Display Checkpoint Check Method and Remedy
Power Heater
(Lamps do not light.)
Power supply
voltage
Check that approx. 120 V AC is supplied at both ends of the power
cord connections on the terminal block.
■If 120 V AC is not supplied, check the following points.
1Check that the circuit breaker is turned ON.
2Check that the power cord is connected securely to the terminal
block.
Power supply
voltage on the
power circuit
board
Check that approx. 120 V AC is supplied between TAB1 and TAB2
(orange) on the power circuit board.
●If 120 V AC is not supplied, check the following points.
Power supply
voltage on the
filter circuit board
Check that approx. 120 V AC is supplied to the following points in
the order of 1and 2.
1Between TAB20 and TAB21 (white and black)
If approx. 120 V AC is not supplied, check the power supply
voltage of the circuit breaker.
2Between TAB22 and TAB23 (orange)
If approx. 120 V AC is not supplied, replace the filter circuit board.
●When 120 V AC is supplied, check the following points.
Connector dis-
connection for
the display circuit
board
Check if the connector CN19 on the display circuit board or CN18
on the control circuit board is disconnected.
Connector discon-
nection between
the circuit boards
Check if the connector CN2 on the power circuit board, CN5 on the
control circuit board, or CN30 or CN31 on the filter circuit board is
disconnected.
Malfunction of
the control circuit
board
If no error is found after checking the above, replace the control
circuit board.
Malfunction of
the power circuit
board
If the hand dryer does not operate even after replacing the control
circuit board, replace the power circuit board.
Malfunction location quick reference chart
(The malfunction location is indicated by the lamp lighting status.)
: ON : Slow blinking (ON for 0.4 seconds/ OFF for 0.4 seconds)
: OFF : Fast blinking (ON for 0.1 second/ OFF for 0.1 second)
Description of the error display
Power lamp
Heater lamp
or
Detected content Cause
Tamper-proof timer
Overvoltage, undervoltage detection
Motor lock error
Motor overspeed error, step-out error
Overcurrent detected
Motor current detection error
Motor signal error
Microcomputer error
Fusing
Insertion of foreign objects, continuous operation
Overvoltage impress, undervoltage impress, control circuit
Power circuit, blower
Air filter, blower, power circuit
Blower (short circuit), power circuit (overcurrent)
Power circuit, disconnected motor
Power circuit, disconnected motor
Control circuit
Current fuse, thermal fuse in motor
Power lamp
Heater lamp
Troubles with error display

─13 ─
Error Mode Display Checkpoint Check Method and Remedy
Power Heater
or
(Tamper-proof timer)
Dirty sensor
window
Dirt may shield the sensors. Wipe the dirt off the sensor window.
Remaining foreign
object
Check for any objects left over and shielding the sensor in the hand
drying area.
Connector dis-
connection for the
sensors
Check if the following connectors are disconnected.
1Sensor circuit board (JT-30S3R) connector CN12
2Sensor circuit board (JT-30S2R) (2 locations) connectors CN15
3Light receiving circuit board connector CN11
4Control circuit board connectors CN7 and CN8
Malfunction of
the control circuit
board
If no error is found after checking the above, replace the control
circuit board.
Power Heater
(Motor step-out)
(Motor lock)
(Motor overspeed)
Motor malfunction Check that the motor is not locked and turns smoothly by hand.
Malfunction of
the power circuit
board
If no error is found after checking the above, replace the power
circuit board.
Blower (assem-
bly) malfunction
If the error display persists after replacing the power circuit board,
replace the blower (assembly).
Power Heater
(Motor current detection
error)
Motor overload Check for causes of motor overload. (Too much higher power sup-
ply voltage, any object disturbing the motor revolution, etc.)
Connector dis-
connection for the
motor
Check if the motor lead wire connectors (black, white, and red) are
disconnected.
Blown thermal
fuse of the motor
Measure the resistance between Red and White and between Red
and Black of the motor lead wires. If it is ∞Ω, replace the blower
(assembly).
Malfunction of
the power circuit
board
If no error is found after checking the above, or if the error display
persists after replacing the blower (assembly), replace the power
circuit board.
Power Heater
(Overvoltage/Undervoltage
detection)
Abnormal power
supply voltage
Check that correct power supply voltage is applied.
• The error will occur if the power supply voltage is approx. 170 V
AC or over, or approx. 60 V AC or under.
*Note: If 170 V AC or over is applied, a current fuse on the power
circuit board may blow.
Malfunction of
the power circuit
board
If no error is found after checking the above, replace the power
circuit board.
Power Heater
(Motor signal error)
Connector discon-
nection
Check if the connector CN5 on the control circuit board, CN2 on
the power circuit board, or CN30 or CN31 on the filter circuit board
is disconnected.
Malfunction of
the control circuit
board
If no error is found after checking the above, replace the control
circuit board.
Power Heater
(Microcomputer error)
Malfunction of
the control circuit
board
Replace the control circuit board.

─14 ─
Symptom Cause Check Method and Remedy
Warm air does not blow. Heater switch Check that the heater switch is turned ON.
(Heater lamp lights with the heater switch ON.)
Connector dis-
connection for the
heater
Check if the connectors TAB3 and TAB4 on the power circuit board
are disconnected.
Blown thermal
fuse of the heater
Measure the resistance between the connectors TAB3 and TAB4
on the power circuit board.
If the fuse is blown, the resistance will be ∞Ω.
In this case, replace the heater (PTC) and the power circuit board.
Malfunction of
the power circuit
board
Check that approx. 120 V AC is output at both ends of the connec-
tors TAB3 and TAB4 on the power circuit board. If it is not output,
replace the power circuit board.
*Note: Approx. 120 V AC is output during operation, and it is not
output during standby.
Heater malfunc-
tion
If no error is found after checking the above, replace the heater
(PTC).
The hand dryer operates
by itself.
The hand dryer does not
stop operation.
Connector dis-
connection for the
sensors
Check if the following connectors are disconnected.
1Sensor circuit board (JT-30S3R) connector CN12
2Sensor circuit board (JT-30S2R) (2 locations) connectors CN15
3Light receiving circuit board connector CN11
4Control circuit board connectors CN7 and CN8
Malfunction of
the sensor cir-
cuit boards (JT-
30S1/2/3R)
Visually check the sensor circuit boards for a defect such as a
crack, corrosion, or a cold solder joint.
If the error persists after replacing the control circuit board in the
next procedure, replace the damaged sensor circuit boards.
Malfunction of
the control circuit
board
If no error is found after checking the above, replace the control
circuit board.
Air speed switch does not
change the air volume.
Connector discon-
nection
Check if the connector CN21 on the control circuit board, CN4 on
the power circuit board, or CN30 or CN31 on the filter circuit board
is disconnected.
Malfunction of
the power circuit
board
If no error is found after checking the above, replace the power
circuit board.
The hand dryer makes
abnormal noises.
Air blow is weak.
Sucking of foreign
matter
Check for any foreign matter sticking to the blower (assembly)
vanes.
Clogged filter Check the filter for clogging with dust, etc.
Incorrect wiring Check if the motor lead wires of the blower (assembly) (red to
TAB7, white to TAB8, black to TAB9) are connected to incorrect
TABs on the power circuit board.
(If they are connected incorrectly, the motor turns in the reverse
direction.)
Malfunction of
the power circuit
board
If no error is found after checking the above, replace the power
circuit board.
Troubles without error display

─15 ─
11. Before receiving repair requests
Frequently asked question Response
Air blow is too weak to dry hands
quickly.
1Check if the filter is clogged.
2Isn’t the air speed switch set at the STANDARD position?
Water leaks from the product. 1Check if the drain tank is filled up. (Empty the drain tank.)
*Note: Drain water will overflow onto the floor when the drain tank is
filled up beyond its capacity.
2Is the drain tank installed properly?
Air does not blow immediately after
turning on the power and inserting
hands.
Initial setting takes 1.5 seconds after turning on the power. Operation
is disabled in the meantime.
Warm air does not blow. 1Is the heater switch turned ON?
2Is the room temperature lower than 89.6°F (32°C)?
The product has an abnormal odor. 1Check if the drain tank is filled up. (Empty the drain tank.)
2
Check the inside of the drain tank for any foreign matter. (Remove it.)
3Is the inside of the side cover cleaned up?
12. Service inspection list
Location Inspection Item Check Result
Electric wiring Are lead wire connectors connected securely?
Is the wiring correct?
Lamps Do the power lamp (LED1), the heater lamp (LED2) (with the
heater switch ON), and blue indicators (LED10, 11) come on?
Operation Does it operate properly?
Isn’t there any abnormal noise, vibration, etc?
Heater Is warm air blown?
Wall installation Isn’t there clearance between the product and the back wall?

─16 ─
13. Overhauling procedures
Work precautions
• Before replacing parts, follow the instructions described in the troubleshooting.
• When servicing, always take care to keep proper footing.
• Before starting the service, always unplug the power cord from the outlet, or turn off the circuit breaker when
no power cord plug is provided. Sufficient care must be taken to avoid electric shock or injury.
• Make sure to connect the power supply wires correctly.
• After completing repairs, check that the unit operates properly.
Always wear gloves when servicing.
The part names in the text are standardized with the part names in the parts catalog. (There are some
exceptions.)
<Internal view and circuit board locations>
Control circuit board
(JT-30M10/JT-30M10A)
Light receiving circuit board
(JT-30S1R)
Sensor circuit board
(Middle sensor)
(JT-30S2R)
Sensor circuit board
(Lower sensor)
(JT-30S3R)
Power circuit board
(JT-34P1H)
Display circuit board
(JT-30S5R)
Filter circuit board
(JT-34F)

─17 ─
The following pictures show JT-SB116JH2-W-NA.
(1)Turn off the power supply.
1Stop the operation.
2Turn off the circuit breaker on the distribution board.
(2) Front panel
1Draw out the tank assembly (assy).
Tank assy
2Unscrew the clamping screws, and remove the front panel.
(Two special (spl) screws 4×16, indicated by )
Front panel
(3) Power cable
1Unscrew the clamping screw, and remove the terminal block (TB)
cover.
(One PTT screw 4×6, indicated by )
2Unscrew the clamping screws, and disconnect the power cable
leads.
(Two screws, indicated by )
Power cable
Ground wire Terminal block
TB cover
Power cable
Terminal block

─18 ─
Assembly precaution
Insert the maint. cover into the groove of the base. (Indicated by )
2Remove the fix plate.
Assembly precautions
• Run the lead wires through the groove of the maint. cover.
(Indicated by )
• Take care not to pinch the lead wires.
Maint. cover
1Unscrew the clamping screws, and remove the maintenance (maint.)
cover.
(Two spl screws 4 x 16, indicated by )
Maint. cover
3Remove the light receiving circuit board (JT-30S1R).
Fix plate
(4) Light receiving circuit board (JT-30S1R)
Maint. cover
Fix plate
Light receiving
circuit board
Light receiving circuit board (JT-30S1R)

─19 ─
(5) Control circuit board (JT-30M10/JT-30M10A)
1Disconnect the lead wires from the control circuit board.
2Unscrew the clamping screw, and remove the control circuit board
(JT-30M10/JT-30M10A).
(One spl screw 4×12, indicated by )
Assembly precaution
Take care not to pinch the lead wires.
Control circuit board
(JT-30M10/JT-30M10A)
(6) Sensor circuit board (Middle sensor) (JT-30S2R)
1 Unscrew the clamping screws for the panel holders left (L) and right (R).
(Two PTT screws 4×16, indicated by )
2Unscrew the clamping screws
for the fix pieces.
(Two spl screws 4×12, indicated by )
3Slightly push aside the panel holders to
take out the fix pieces. (Two
locations)
4Remove the sensor circuit boards (JT-30S2R) from the fix pieces.
Sensor circuit board (JT-30S2R)
Assembly precautions
• Insert the sensor circuit board between the claws
of the fix piece.
• Take care not to pinch the lead wires.
• After installing the circuit board, make sure that
the LED is upright.
Panel holder R
Fix piece
Fix piece
(7) Power circuit board (JT-34P1H)
1Unscrew the clamping screws, and remove the circuit board (PCB)
cover.
(Two PTT screws 4×16, indicated by )
PCB cover
2Disconnect the lead wires from the power circuit board (JT-34P1H),
and remove the power circuit board.
Power circuit board (JT-34P1H)
Assembly precautions
• When attaching the PCB cover, take care not to pinch the lead
wires.
• Connect the lead wires as printed on the power circuit board.
Claw
Fix piece
LED
Panel holder L

─20 ─
(8) Filter circuit board (JT-34F)
1Unscrew the clamping screw, and remove the terminal block (TB)
cover.
(One PTT screw 4×6, indicated by )
Ground wire
2Unscrew the clamping screw, and disconnect the ground wire.
(One PT screw 4×8 BS, indicated by )
3Unscrew the TB fix plate clamping screw, and remove the terminal
block parts.
(One PTT screw 4×16, indicated by )
TB fix plate
4Unscrew the clamping screw, and remove the PCB cover.
(One PTT screw 4×6, indicated by )
PCB cover
Assembly precaution
Install the PCB cover over the TB fix plate.
Precaution
Pay attention not to pull the ground wire, which is threaded through
the cord bush of the TB cover.
TB cover
Terminal block
5Disconnect the lead wires from the filter circuit board.
6Remove the spacers (four locations, indicated by ), and then re-
move the filter circuit board (JT-34F).
(Pinch the spacers from the back for easier removal.)
Filter circuit board (JT-34F)
Assembly precaution
Run the lead wires through the cord bushes. (Indicated by )
TAB21TAB20