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Sanyo MLS-3781L - User Manual

Sanyo MLS-3781L
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I FILE No.
SERVICE MANUAL High-pressureSleamSlerilizer
Labo
Autoclave
MODEL NO.
MLS-37S1
Ll3781
L
Photo:
MLS-3751
L
INDEX
~--
ITEM NAME PLATE
•
Model
No.indication
R""N,r:; LABEL
+Model
No.
and
rated
power
supply
voltage
are
indicated
here.
Model No.
Rated
Voltage Plug
MLS·3751L AC 120V
MLS·3751L
AC230V
MLS·3781L
AC230V
MLS·3781L
AC230V
Productcord
No.
131699501
131699502
131699401
131699402
1.
Safety Precautions
in
Servicing Work
....................................................
·············1
2.
Specifications
......................................................
·········································2
3.
Outside Dimensions
...............................•...........•...........•...........................
3"""4
4.
Names of
Parts
and Operations
......................................................
··············5-6
5.
Construction and Functions
.......................................................................
7
..........
10
6.
Piping Diagram
and
Wiring Diagram
...........•...........•...........•..................
·····11~12
7.
Process Flow
and
Operations
..................................................................
··13~21
8.
About Various Modes .. · .. · .. · .. · .. · .. · .. · .. · .. · .. · .. · .. · .. · .. · .. · .. · ..
····
.. · .. ·
....
· .. · .. · .. ·· .. 22
..........
27
9.
Temperature
and
Pressure Adjustment and Checking
....................................
··28
..........
32
10. Thermistor Temperature Characteristics /
Altitude.
Atmospheric Pressure and Boiling Point
in
Standard
Atmosphere················
33
11. Circuit Diagram
......................................................
······································34
12. Troubleshooting
......................................................
································35~44
13. Disassembling Procedure
.............•...........•...........•...........•......................
··45~50
14. Instruction Manual .. · .. · .. · .. · .. · .. · .. · .. · .. · .. · .. · .. · .. · .. ·
..
· .. · .. · .. ·
..
· .. · .. ·
....
· .. · .. · .. ·· ..
51
..........
63
15.
Parts
List
.......................................................•...........•......................
··64~71
16. Instruction Manual
of
Works for Optional Parts
···
.. · .. · .. · .. · .. · .. · .. · .. ·
....
· .. · .. · .. ·· .. 72
..........
79
REFERENCE No. SM6610004

Questions and Answers

  • C
    Christopher JacksonAug 9, 2025
    What to do if my Sanyo Laboratory Equipment has no sound?
    • J
      Jacob HawkinsAug 9, 2025
      If the Sanyo Laboratory Equipment emits no sound, first ensure it's not in sound warning mode. If it is, switch to 'Loud' or 'Medium' volume. Note that no sound is normal during sound warning mode. Check the speaker's resistance value; it should be around 8Ω. If there's a short-circuit or wire breakage, replace the speaker. Inspect the housing set X+U(3751) or D+T(3781) for connection issues or wire breaks and correct them if necessary. If problems persist, replace the 'PCB set, control TH set'.
  • U
    uwileyAug 15, 2025
    How to fix power issue on Sanyo Laboratory Equipment?
    • R
      rojasjennaAug 16, 2025
      If your Sanyo Laboratory Equipment isn't getting power, check if the breaker is off and turn it on. Also, inspect the power cord for any damage; if broken, replace it.
  • C
    Carl HodgesAug 25, 2025
    What to do if Sanyo MLS-3781L chamber leaks steam?
    • J
      James ScottAug 25, 2025
      If steam is leaking from the periphery of the chamber of your Sanyo Laboratory Equipment, start by cleaning the contact part of the packing and the chamber top. If the chamber lid packing is deteriorated, it should be replaced.
  • B
    Brendan LeeSep 1, 2025
    How to stop steam leak from Sanyo Laboratory Equipment pipe?
    • S
      Shaun EatonSep 1, 2025
      If steam leaks from the pipe and joint of your Sanyo Laboratory Equipment, check the heater mounting part (lower side of the chamber) and retighten any loose nuts. Also, check the pipe connection and retighten if loosened. If the hose band is loose, lace it.
  • С
    СергейJan 30, 2026
    Подскажите пожалуйста марку термодатчиков(термистров) тн1, тн3

    Summary

    Safety Precautions in Servicing Work

    Specifications

    Names of Parts and Operations

    Construction and Functions

    Process Flow and Operations

    Descriptions of Process Operation

    Detailed explanations of each step in various sterilization processes.

    Descriptions of Safety Device Actuation

    About Various Modes

    Temperature and Pressure Adjustment and Checking

    Adjustment of Thermistors

    Manually correcting temperatures of lateral, object, and bottom thermistors.

    Adjustment of Pressure Sensors

    Manually correcting pressure sensor readings at open lid and 135°C.

    Checking Safety Valve Operation

    Procedure to check if the safety valve actuates correctly at specified conditions.

    Circuit Diagram

    Troubleshooting

    Stand-by Not Displayed

    Troubleshooting steps for when the unit does not power on or display stand-by.

    Lid Appears on Display

    Troubleshooting for "Lid" error preventing process start.

    Door Appears on Display

    Troubleshooting for "door" display error when the cover is closed.

    Process Does Not Start

    Steps to take when the process fails to start.

    Power Not Supplied to Heater

    Diagnosing issues where the heater is not receiving power.

    Hose Appears on Display

    Steam Leaks from Chamber Periphery

    Identifying and fixing steam leaks around the chamber.

    Steam Leaks from Pipe and Joint

    Diagnosing and repairing steam leaks from pipes and joints.

    Open Error (E1) Lateral Thermistor

    Troubleshooting for lateral thermistor open circuit errors.

    Abnormal Temp. Object Sensor (TH2)

    Troubleshooting for abnormal object temperature sensor readings.

    Abnormal Temp. Bottom Thermistor (TH3)

    Troubleshooting for bottom thermistor abnormal temperature errors.

    Handle Lock Unlockable (E6)

    Diagnosing and fixing issues with the handle lock mechanism.

    Movable Handle and Lid Lock Not Working (E7)

    Troubleshooting for issues with the movable handle and lid lock.

    Abnormally High Pressure (E8)

    Addressing situations of abnormally high pressure within the chamber.

    Pressure is Low (E9)

    Troubleshooting steps for low pressure conditions.

    Data Read;Write Error (E10)

    Resolving issues with memory read/write errors.

    Optional Printer Not Working

    No Sound Issued

    Date and Time Reset

    Disassembling Procedure

    Dismounting the Packing of the Chamber

    Dismounting the Side Panel and Back-Side Panel

    Dismounting the PC-Board Assembly for Control

    Sanyo MLS-3781L Specifications

    General IconGeneral
    ModelMLS-3781L
    Magnification40x-1000x
    StageMechanical
    CondenserAbbe
    FocusCoaxial coarse and fine
    TypeUpright Biological Microscope

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