Biosan LMC-56 User manual

The following spare parts are available for LMC-56:
LMC-56 Service Manual - V.1AD Version - 1, May 2022 Page 1
Periodical maintenance
LMC-56 does not require periodical technical maintenance, except cleaning.
Cleaning. Standard ethanol (75%) or any other cleaning liquids can be used for cleaning
and disinfecting of the device, if it does not contain any strong organic solvents (such as
acetone, toluene or benzene).
Service Manual for
Centrifuge LMC-56
No. Spare part Marking Article
5 Control Board MASTR2 BS-010208-S01
6 LCD Board BC1602AGPLCTb BS-000000-S01
7 Microprocessor PIC16F628A BS-010208-S02
8 Button Board FBUTT BS-010208-S03
9 Power Board BLDRV3F BS-010208-S32
10 Bridge KBPC1510 BS-010208-S05
12 XY Filter Board FILTER XY BS-010208-S06
4 Optocouple Board SSBR3 BS-010208-S33
11 Transformer TTS100Z 230/2x12V BS-010208-S08
11 Transformer TTS100Z 110/2x12V BS-010208-S09
3 Microswitch SM05S-09A BS-010208-S10
13 Motor BLS5775-001 BS-010208-S11
1 Fuse FSMO 1A - 240V BS-000000-S21
1 Fuse FSMO 2A - 110V BS-000000-S07
2 Solenoid TAU-1040 BS-010208-S34
17 Hinge BS-010208-S38
15 Power socket with fuse Holder BVB B01/Z0000/01 BS-000000-S22
18 Casing LMC-3000 BS-010208-S15
14 Rubber shock absorbers for motor BS-010208-S16
16 EMI Filter F.ALDB2150ZD BS-010208-S17
No. Starting version/date Compatibility Spare part Marking Article
1 V.1AD / 02.12.2019 - Fuse FSMO 2A - 230V BS-000000-S07
1 V.1AD / 02.12.2019 - Fuse FSMO 4A - 115V BS-000000-S13
2 V.1AD / 02.12.2019 - Rotor type sensor assembly HALL_SEN_V1 BS-010221-S19
3 V.1AD / 02.12.2019 - Switch C1350 BS-010221-S20
4 V.1AD / 02.12.2019 - Power socket with fuse Holder PF0030/63 BS-010221-S13
5 V.1AD / 02.12.2019 - EMI Filter 6VV1 BS-010221-S14
6 V.1AD / 02.12.2019 - Motor FL86BLS58 BS-010221-S07
7 V.1AD / 02.12.2019 - Rubber shock absorbers for motor (large) BS-010221-S11
8 V.1AD / 02.12.2019 - Rubber shock absorbers for motor assembly (small) BS-010221-S12
9 V.1AD / 02.12.2019 - Fan EF92252S1 BS-010221-S17
10 V.1AD / 02.12.2019 - Imbalance sensor HALL_SEN_V2 BS-010221-S18
11 V.1AD / 02.12.2019 - Voltage Converter Board SDC01 BS-010221-S06
12 V.1AD / 02.12.2019 - Power Board LMC_H2S BS-010221-S03
13 V.1AD / 02.12.2019 - AC-DC Power Supply LRS-350-48 BS-010221-S05
14 V.1AD / 02.12.2019 - Button Board BUTT8 BS-010221-S02
15 V.1AD / 02.12.2019 - Optocouple Board / Lid lock sensor SSBR3 BS-010221-S10
16 V.1AD / 02.12.2019 - Solenoid TAU1040T BS-010221-S08
17 V.1AD / 02.12.2019 - Microswitch SM05S-09A BS-010221-S09
18 V.1AD / 02.12.2019 - Microprocessor PIC16F1933-I/SP BS-010221-S04
19 V.1AD / 02.12.2019 - Control Board ROT4H BS-010221-S01
20 V.1AD / 02.12.2019 - LCD Board BC1602AGPLCTb BS-000000-S01
21 V.1AD / 02.12.2019 - Lid Hinge set BS-010221-S15
22 V.1AD / 02.12.2019 - Casing LMC-56 BS-010221-S16

I. Spare part replacement
1. The Fuse replacement
1. Disconnect from the power supply socket.
2. Remove the IEC power plug from the rear of the unit.
3. (fig.2/1)Pull out the fuse drawer .
4. Remove the fuse from the holder.
5. Check and replace with the correct fuse
if necessary it is (230V - 2A; 115V - 4A).
6. Close the fuse holder and connect the power cord.
Disassembling
1. Disconnect from the power supply socket.
2. Remove the IEC power plug from the rear of the unit.
3. Slide the centrifuge to the front of the bench to access the
emergency opening slot (fig.3/1) on the underside of the unit.
Insert a small screwdriver (or similar tool with diameter up to 3
mm) into the emergency opening slot and move the lever from
the left to the right hand side to release the lid lock.
4. Open the lid and unscrew the fixing nut of the rotor (fig.1/1;1/2).
5. Remove the rotor (fig.1/3).
6. Carefully turn the unit over.
7. Unscrews the four screws on the centrifuge underside (fig.3/2). Turn the
centrifuge over again, open lid.
8. Pull up rotor chamber and disconnect rotor type detector wire (fig.7/1).
9. Remove the rotor chamber (fig.4).
Disassembling is applied to all replacements mentioned below.
2. To replace the Rotor type sensor assembly:
– release the wire from glue spots (fig.4/2);
– unscrew the four screws (fig.4/1) and remove the axle cover;
– tear off small part of rubber collar to get access to Rotor type
sensor assembly screw (fig.5/1) and unscrew it;
– pull out assembly from the slot (fig.5/2);
– replace the Rotor type sensor assembly and re-assemble the unit.
3. To replace Switch:
– disconnect all terminals (fig.6/1) from the Switch;
– pull out the Switch;
– replace the Switch;
– re-assemble the unit.
4. To replace the Power socket with fuse holder:
– unscrew the two screws (fig.2/2) and pull out
the Power socket with fuse holder ;
– disconnect the wires (fig.6/2);
– replace the Power socket with fuse holder;
– re-assemble the unit.
5. To replace the EMI Filter:
– disconnect all wire terminals (fig.6/3) from the EMI Filter;
– unscrew the two screws (fig.6/4) and remove the EMI Filter;
– replace the filter;
– re-assemble the unit.
Vfig.2
Vfig.3
Zfig.1
123
Vfig.4
12
LMC-56 Service Manual - V.1AD Version - 1, May 2022 Page 2
Underside
Rotor
Rear view
Rotor chamber underside
2
4
513
6
7
3
8
1
3
24
5
4
13 2
12
9. Unscrew three fixing screws on the lid holder
on the rear side of the unit (fig.2/2) and remove the lid.
Note: while re-assembling use three screws (fig.2/2) to
adjust the lid and remove air gaps between rubber
layer and lid.
10. Carefully turn the unit on underside again.
11. Unscrew the six screws on the underside
of the unit (fig.3/2) to release the casing.
12. Carefully lift the casing and disconnect the
cable of the Control board (fig.4/6),
solenoid power wire (fig.4/4), optocouple
wire (fig.4/8) and grounding wire (fig.4/7).
13. Remove the casing completely.
14. If it is necessary replace the rubber foots.
Note: When re-assembling always
glue terminals to the sockets.
1
2
2. To replace the Solenoid:
– disconnect the spring (fig.5/1);
– unscrew the four screws (fig.4/1) and remove the Solenoid;
– replace the Solenoid (fig.4/5) and re-assemble the unit.
Disassembling for Control, Button boards, Microprocessor
and Microswitch:
1. Disconnect the Microswitch power wire from the control board (fig.4/2).
2. Unscrew the six screws on the solenoid holder plate (fig.4/3) and remove
it.
3
3
4
3
5

Vfig.5
LMC-56 Service Manual - V.1AD Version - 1, May 2022 Page 3
scheme.1
Lid lock
Electronics base plate
21
3
4
5
1 2
3
4
5
Lid lock
Vfig.6
fig.7
1
Closed Open
Vfig.5
Rotor type sensor assembly
1
2
Vfig.6
Rotor chamber removed
Vfig.7
Power board
2. To replace the Solenoid:
– disconnect the spring (fig.5/1);
– unscrew the four screws (fig.4/1) and remove the Solenoid;
– replace the Solenoid (fig.4/5) and re-assemble the unit.
Disassembling for Control, Button boards, Microprocessor
and Microswitch:
1. Disconnect the Microswitch power wire from the control board (fig.4/2).
2. Unscrew the six screws on the solenoid holder plate (fig.4/3) and remove it.
3. To replace the Microswitch (fig. 5/2):
– unscrew the two screws on the Microswitch (fig.5/2);
– remove the Microswitch;
– install the new Microswitch (fig.5/3) in the place;
– adjust the lever of microswitch as shown at (fig.5/4);
– connect the terminals;
– re-assemble the unit.
4. To replace the Optocouple board:
– disconnect Optocouple board wire from the power board (fig.8/1);
– unscrew the two screws and remove the Optocouple (fig.5/5);
– replace the Optocouple and re-assemble the unit;
Note: Using screws (fig.5/5) adjust optocouple board position so when lock is
closed, the sensor is crossed (fig.6/1, scheme).
5. To replace Control Board:
– disconnect the terminals from the Control Board;
– unscrew the four screws on the Control Board assembly (fig.7/2);
– remove Control Board;
– replace the Control Board;
– re-assemble the unit.
Note: LCD Board connected with Control Board via socket.
During installation avoid mechanical strain of LCD Board.
If washers was applied between Control and LCD Board before
disassembling, then mount them back while re-assembling.
6. To replace LCD Board:
– disconnect the terminals from the Control Board;
– unscrew the four screws on the Control Board assembly (fig.7/2);
– remove the LCD Board located under the control board;
– replace the LCD Board;
– re-assemble the unit.
Note: During installation avoid mechanical strain of LCD Board.
If washers was applied between Control and LCD Board before
disassembling, then mount them back while re-assembling.
LCD contrast tuning
– after replacing the Control Board or the LCD Board, LCD display need
contrast tuning;
– to tune contrast of the display, it is necessary to connect to the
circuit and switch the unit without re-assembling;
– take necessary precautions against electric shock hazard;
– connect the cables and power wires;
– plug in the power cord to the circuit and switch on the unit;
– the display lites up;
– turn the potentiometer screw (fig.7/4) and tune the display contrast;
– re-assemble the unit.
14. To replace the Imbalance sensor:
– pull out three cotter pins (fig.12/2) and lift up the motor assembly;
– on device underside pull out failed shock absorber cotter pin;
– install the new shock absorber and secure it with the pins;
– re-assemble the unit.
12
4
3
1
2
5
3
6
120 mm
7
6. To replace the Motor:
– release the motor wires from wire straps;
– disconnect the Motor wires from the power board (fig.7/2);
– disconnect wire insulation terminal (fig.7/3) from ground connection point;
– unscrew the two lock screws on the rotor axle (fig.6/7) and remove it;
– unscrew the three nuts on the Motor holder (fig.6/5);
– lift up the motor block and remove it;
– unscrew the four screws from the Motor holder (fig.3/3);
– release the holder and replace the Motor;
– re-assemble the unit.
7. To replace the Rubber shock absorbers for motor:
– unscrew the three nuts on the Motor holder (fig.6/5);
– lift up the motor block assemby;
– unscrew the three nuts on the middle ring (fig.6/7) mind the
screws on other side;
– on middle ring underside unscrew failed shock absorber
fixing screw;
– install the new shock absorber;
– re-assemble the unit.
8. To replace the Rubber shock absorbers for motor assembly:
– unscrew the three nuts on the middle ring (fig.6/7) mind the
screws on other side;
– lift up the motor block assemby, remove failed shock absorber;
– replace shock absorber;
– re-assemble the unit.
Disassembling to access the rest of replacement parts:
1. Unscrew three fixing screws on the lid holder on the rear side of
the unit (fig.2/4) and remove the lid, hold the fixing plate on the
other side.
Note: while re-assembling use three screws (fig.2/4) to adjust the lid
and remove air gaps between rubber layer and lid.
2. Carefully turn the unit upside down again.
3. Unscrew the eigth screws on the underside
of the unit (fig.3/3) to release the casing.
4 the and disconnect the cable c. Carefully lift casing of the ontrol
board,solenoid power wire (fig.7/5),lid lock sensor wire (fig.7/4),
microswitch wire (fig.7/6) and grounding wire terminal (fig.7/7),
imbalance sensor wire (fig.10/1).
5. Remove the casing completely.
Note: When re-assembling always
glue terminals to the sockets.
Disassembling is applied to all replacements mentioned below.
9. To replace the Fan:
– release the fan wire from wire straps;
– unscrew the two screws (fig.8/1) and release the wire;
– unscrew the four screws (fig.2/3) mind the nuts on other side, remove the Fan;
– replace the Fan;
– re-assemble the unit.
456
7

fig.9
LMC-56 Service Manual - V.1AD Version - 1, May 2022 Page 4
10. To replace the Imbalance sensor:
– release the Imbalance sensor wire from wire straps;
– unscrew the two screws (fig.8/2) remove the Imbalance sensor;
– replace the Imbalance sensor;
– re-assemble the unit.
11. To replace the Voltage Converter Board:
– unscrew the fixing screws of all wires
and disconnect them (fig.8/1);
– unscrew the four screws on the Voltage Converter board
(fig.8/3) and release it;
– replace the Voltage Converter board;
– re-assemble the unit.
12. To replace the Power Board:
– disconnect all wire terminals from the Power board;
– unscrew the fixing screws of power wires
and disconnect them (fig.8/4);
– unscrew the three screws on the Power board (fig.8/5);
– replace the Power board;
– re-assemble the unit.
13. To replace AC-DC Power Supply:
– unscrew the screws (fig.8/7) and release the wires;
– unscrew the five screws (fig.8/6) and lift base plate;
– unscrew the four screws on base plate underside and release Power Supply;
– replace the AC-DC Power Supply;
– re-assemble the unit.
14. To replace the Button Board:
– disconnect the terminal from the Button Board;
– unscrew the four screws (fig.10/2) on the Button board ;
– replace the Button board;
– re-assemble the unit.
15. To replace the Optocouple board/Lid lock sensor:
– disconnect Optocouple board wire from the power board (fig.7/4);
– unscrew the two screws and remove the Optocouple (fig.9/1);
– replace the Optocouple and re-assemble the unit;
Note: Using screws (fig.9/1) adjust optocouple board position so when lock is
closed, the sensor is crossed (fig.9, scheme).
16. To replace the Solenoid:
– disconnect Solenoid wire from the power board (fig.7/5);
– unscrew the nut (fig.9/2);
– unscrew the four screws (fig.10/3) and remove the Solenoid;
– replace the Solenoid and re-assemble the unit.
Note: Using screws (fig.10/3) adjust optocouple board position so when
lock is closed, the sensor is crossed (fig.9, scheme).
17. To replace the Microswitch:
– disconnect Microswitch terminal from Power Board (fig.7/6);
– unscrew the two screws on the Microswitch (fig.9/3);
– replace the Microswitch;
– re-assemble the unit.
Note: Adjust new lever shape same as in replacable microswitch.
Power board
fig.8
Close up of power board
1
2
fig.10
Transformer
13
AC
AC
-
+
scheme.2
35
4
G
G
+Up
+12
1
4
2
Vfig.8
Casing removed
1
imbalanc
voltage convertr
power board
power supply
Vfig.9
Lid lock and front panel
Vfig.10
Lid lock and front panel
7. To replace the Microprocessor:
– with the help of special tool or using a small, flat tip screwdriver carefully
remove the Microprocessor (fig.7/5);
Do not mix up correct side installing the new one!
The Microprocessor’s and connector’s shape
has the same notch (1. scheme).
Use special tool for microprocessor installation, do not touch
microprocessor pins with bare hands, while replacing
microprocessor use ESD-protection – wrist strap.
Microprocessor is delivered already programmed.
– replace the Microprocessor;
– re-assemble the unit.
8. To replace the Button Board:
– disconnect the terminal from the Button Board;
– unscrew the two screws on the Button board (fig.7/3);
– replace the Button board;
– re-assemble the unit.
3. To replace the Microswitch (fig.8/5):
– disconnect Microswitch terminal from Power Board (fig.8/3);
– unscrew the two screws on the Microswitch (fig.8/4);
– replace the Microswitch;
– re-assemble the unit.
9. To replace the Power Board:
– disconnect all the terminals from the Power board;
– unscrew the fixing screws of power wires
and disconnect them (fig.9/1);
– unscrew the two screws on the Power board (fig.7/2);
– replace the Power board;
– check voltage between connectors (fig.9)
[G] - [+ U ] correct voltage range 26-34V
p
and [G] - [+ 12] correct voltage range 10-14V;
– re-assemble the unit.
10. To replace the Bridge:
– disconnect the four terminals of the Bridge;
– unscrew the one fixing screw of the Bridge (fig.10/4);
– replace the Bridge;
– re-assemble the unit.
Checking of the Diode Bridge:
– connect multimeter probes to side leads (scheme.2);
– turn the multimeter on diode checking mode;
– take measurement, it should be some value;
– change the probes with each other;
– take measurement, it must be a 0 V;
– repeat this process on each side leads (together 8 measurements);
Note: There must be in total four measurements when multimeter
show 0 and four measurements when show a value. If not then
the bridge is damaged.
1
2
3
45
6
7
2
1
Closed Open
2. To replace the Solenoid:
– disconnect the spring (fig.5/1);
– unscrew the four screws (fig.4/1) and remove the Solenoid;
– replace the Solenoid (fig.4/5) and re-assemble the unit.
Disassembling for Control, Button boards, Microprocessor
and Microswitch:
1. Disconnect the Microswitch power wire from the control board (fig.4/2).
2. Unscrew the six screws on the solenoid holder plate (fig.4/3) and remove it.
3. To replace the Microswitch (fig. 5/2):
– unscrew the two screws on the Microswitch (fig.5/2);
– remove the Microswitch;
– install the new Microswitch (fig.5/3) in the place;
– adjust the lever of microswitch as shown at (fig.5/4);
– connect the terminals;
– re-assemble the unit.
4. To replace the Optocouple board:
– disconnect Optocouple board wire from the power board (fig.8/1);
– unscrew the two screws and remove the Optocouple (fig.5/5);
– replace the Optocouple and re-assemble the unit;
Note: Using screws (fig.5/5) adjust optocouple board position so when lock is
closed, the sensor is crossed (fig.6/1, scheme).
5. To replace Control Board:
– disconnect the terminals from the Control Board;
– unscrew the four screws on the Control Board assembly (fig.7/2);
– remove Control Board;
– replace the Control Board;
– re-assemble the unit.
Note: LCD Board connected with Control Board via socket.
During installation avoid mechanical strain of LCD Board.
If washers was applied between Control and LCD Board before
disassembling, then mount them back while re-assembling.
6. To replace LCD Board:
– disconnect the terminals from the Control Board;
– unscrew the four screws on the Control Board assembly (fig.7/2);
– remove the LCD Board located under the control board;
– replace the LCD Board;
– re-assemble the unit.
Note: During installation avoid mechanical strain of LCD Board.
If washers was applied between Control and LCD Board before
disassembling, then mount them back while re-assembling.
LCD contrast tuning
– after replacing the Control Board or the LCD Board, LCD display need
contrast tuning;
– to tune contrast of the display, it is necessary to connect to the
circuit and switch the unit without re-assembling;
– take necessary precautions against electric shock hazard;
– connect the cables and power wires;
– plug in the power cord to the circuit and switch on the unit;
– the display lites up;
– turn the potentiometer screw (fig.7/4) and tune the display contrast;
– re-assemble the unit.
14. To replace the Imbalance sensor:
– pull out three cotter pins (fig.12/2) and lift up the motor assembly;
– on device underside pull out failed shock absorber cotter pin;
– install the new shock absorber and secure it with the pins;
– re-assemble the unit.
2
3
3 4
4

18. To replace the Microprocessor:
– unscrew the five screws (fig.9/4) and remove lid lock assembly;
– with the help of special tool or using a small, flat tip screwdriver carefully
remove the Microprocessor (fig.11/3);
Do not mix up correct side installing the new one!
The Microprocessor’s and connector’s shape
has the same notch (1. scheme).
Use special tool for microprocessor installation, do not touch
microprocessor pins with bare hands, while replacing
microprocessor use ESD-protection – wrist strap.
Microprocessor is delivered already programmed.
– replace the Microprocessor;
– re-assemble the unit.
19. To replace Control Board:
– unscrew the five screws (fig.9/4) and remove lid lock assembly;
– disconnect all terminals from the Control Board;
– unscrew the four screws on the Control Board assembly (fig.11/1);
– remove Control Board;
– replace the Control Board;
– re-assemble the unit.
Note: LCD Board connected with Control Board via socket.
During installation avoid mechanical strain of LCD Board.
If washers was applied between Control and LCD Board before
disassembling, then mount them back while re-assembling.
20. To replace LCD Board:
– unscrew the five screws (fig.9/4) and remove lid lock assembly;
– disconnect the terminals from the Control Board;
– unscrew the four screws on the Control Board assembly (fig.11/1);
– remove the LCD Board located under the control board;
– replace the LCD Board;
– re-assemble the unit.
Note: During installation avoid mechanical strain of LCD Board.
If washers was applied between Control and LCD Board before
disassembling, then mount them back while re-assembling.
LCD contrast tuning
– after replacing the Control Board or the LCD Board, LCD display need
contrast tuning;
– to tune contrast of the display, it is necessary to connect to the
circuit and switch the unit without re-assembling;
– take necessary precautions against electric shock hazard;
– connect the cables and power wires;
– plug in the power cord to the circuit and switch on the unit;
– the display lites up;
– turn the potentiometer screw (fig.11/2) and tune the display contrast;
– re-assemble the unit.
LMC-56 Service Manual - V.1AD Version - 1, May 2022 Page 5
fig.11
XY filter board
1
fig.12
Motor assembly
fig.13
Motor
1
2
2
1
2 3
fig.14
Power socket and EMI filter
12 3
11. To replace the Transformer:
– release the Transformer power wires from the straps;
– disconnect the Transformer wires from
the bridge (fig.10/3) and power board (fig.9/1);
– unscrew the fixing screws and disconnect
the wires from XY filter board (fig.10/1);
– unscrew the screw on Transformer (fig.10/2);
– replace the Transformer;
– re-assemble the unit.
12. To replace the XY Filter board:
– unscrew the four fixing screws (fig.11/1) of the power
wires and disconnect them;
– unscrew the two screws on the XY Filter Board (fig.11/2);
– replace the XY Filter Board;
– re-assemble the unit.
13. To replace the Motor:
– disconnect the Motor wires from the power board;
– unscrew the screw (fig.12/1) and release wire insulation layer;
– unscrew the lock screw on the Motor
head piece (fig.13/1) and remove it;
– unscrew the four screws on the Motor holder (fig.12/3);
– carefully lift up the motor block and remove it (fig.13);
– unscrew the four screws from the Motor holder (fig.13/2);
– remove the holder and replace the Motor;
– re-assemble the unit.
14. To replace the Rubber shock absorbers:
– pull out three cotter pins (fig.12/2) and lift up the motor assembly;
– on device underside pull out failed shock absorber cotter pin;
– install the new shock absorber and secure it with the pins;
– re-assemble the unit.
15. To replace the Power socket with fuse holder:
– unscrew the two screws (fig.2/3) and pull out
the Power socket with fuse holder ;
– disconnect the wires (fig.14/1);
– replace the Power socket with fuse holder;
– re-assemble the unit.
16. To replace the EMI Filter:
– disconnect all wires (fig.14/2) from the EMI Filter;
– unscrew the two screws (fig.14/3) and remove the EMI Filter;
– replace the filter;
– re-assemble the unit.
scheme.1
Vfig.11
Electronics base plate
123

LMC-56 Service Manual - V.1AD Version - 1, May 2022 Page 6
21. To replace the Lid Hinge Set:
– unscrew the remaining six screws (fig.2/5) to release
hinges from the holder plate;
– unscrew the four screws (fig.12/1)
and remove the Hinges from the lid;
– replace the hinges;
– re-assemble the unit.
Note: Using the two screws (fig.14, fig.15) adjust the lid opening force,
so that when the open button is pushed, lid slightly lifts up.
Hinge testing:
1 Close the lid, till click..
Note: Ensure that the click sounds.
2. R “ ” eading in the lower line of the display
indicate that the lid is closed.
Note: If this reading has not appeared on the display
centrifugation cannot be started. Try to open and
close the lid again.
3. Press OPEN key.
- If “ ” indication has appeared on the display,
lid opening force is functioning well.
- If “ ” indication has left on the display,
then lid opening force must be adjusted.
Hinge force adjustment:
1. After OPEN key is pressed centrifuge lid should slightly open
up by itself (fig.13).
2. If the distance of the opened lid is less than 0.5 cm, it is necessary
to increase lid hinges spring force.
Note: Lid hinges force must be adjusted by flat screwdriver, ONLY
WHEN LID IS FULLY OPEN.
3. With screwdriver turn both hinges screws on ¼ of turn clockwise (fig.14).
4. Check lid position after opening.
- If the distance of the opened lid less then 0.5 cm, perform adjustment again.
- If the distance is inside range from 0.5 till 1.5 cm, lid hinges is adjusted
properly.
- If distance of the opened lid more then 1.5 cm, perform the following.
5. With screwdriver turn both hinges screws on ¼ of a turn counterclockwise
(fig.15).
22. To replace the Casing:
– unscrew the five screws (fig.9/4) and remove lid lock assembly;
– unscrew the six screws (fig.10/4) on electronics base plate and remove it;
– replace the casing;
– re-assemble the unit.
fig.12
Hinges
1
fig.13
Right lid position
fig.14
Forcing the hinges
fig.15
Lessening the hinges
Open Closed

LMC-56 Service Manual - V.1AD Version - 1, May 2022 Page 7
II. Electrical Safety tests
With the unit disconnected from the AC power supply, and the power supply lead plugged into
the unit, perform the following safety tests before returning the unit to the customer.
- Earth Bonding Test
Use a low resistance measuring instrument to check that the resistance between unit
chassis and power cable earth connector is less than 0.1 ohm.
- Insulation Resistance Test
Connect the live and neutral pins of the power supply plug together. Use a 500V insulation
resistance tester and measure the insulation resistance between the earth and live/neutral
pins. This should be greater than 2 Mohm.

LMC-56 Service Manual - V.1AD Version - 1, May 2022 Page 8
Button
Board
Solenoid
Power
Board
Optocouple
Lid lock sensor
Control
Board
Motor
Microswitch
Power Socket EMI filter
Button
Board
Solenoid
Power Board
Optocouple
Control Board
with LCD Board
Motor
Microswitch
Microswitch
Bridge
XY Filter Board
Transformer
Power Socket
EMI filter
Fan
LCD
Board
Voltage
converter
board
AC-DC Power supply
Rotor type
sensor
Imbalance
sensor
Switch

LMC-56 Service Manual - V.1AD Version - 1, May 2022 Page 9