accuspin micro 120 v

accuSpin Micro SERVICE MANUAL 12003241

Edition:01 0 - 0 accuSpin Micro17/02/03 He

TABLE OF CONTENS

Section Title Doc.- Page1 OPERATING INSTRUCTIONS (not part of this manual)

2 SERVICE2.1 Servicing Schedule 2-1/22.2 Trouble Shooting 2-3/52.3 Test Points 2-62.4 Cleaning of Instrument Parts 2-72.5 Electrical Safety Check 2-8

3 FUNCTIONAL DESCRIPTION3.1 Block Functions 3-13.2 Functions of Main Board 3-2/33.3 Key and Indication Board (Part of Main Board) 3-4

4 DIAGRAMS4.1 Block Diagram 4-14.2 Wiring Diagrams 4-2/34.3 Wiring Connection Diagrams 4-4/54.4 Main Board (120V) - Component Plan 4-64.5 Main Board - Wiring Diagram 4-7/11

5 DISASSEMBLY OF INSTRUMENT PARTS5.1 Housing / Casing Parts 5-15.2 Electrical Components 5-25.3 Drive Components 5-3

6 SPARE PART FIGURES AND LISTS6.1 Break Down Drawings 6-1/26.2 Spare Part Lists

7 Preventive maintenance checklist 7-1/3Calibration Certificate 7-4

8 TECHNICAL BULLETINS

Service

Edition: 01 2 - 1 accuSpin Micro17.02.03 He

2.1 Servicing Schedule (yearly procedure recommended)2.1.1 Maintenance Routine without Dismantling the Centrifuge2.1.1.1 Electrical Installation and Safety

• Switch OFF the centrifuge and disconnect the unit from power, check voltage supply and mainsfusing (16 Amps, slow blow characteristic)

• Check condition of plug and wall socket - (let) replace defective parts• Check cord condition and fixing / connection - replace or refit it• Check condition of instrument socket and replace it in case of bad contacts

2.1.1.2 Location and Mechanical Installation• Check the base (ground, table, lorry with lockable wheels etc.) For resonance-free and stable

conditions• Check for a well ventilated place and sufficient distances to walls or adjacent equipment, without

exposure to direct sunlight• Check the leveling of instrument (use a spirit level)

2.1.1.3 Lid Locking Mechanism and Safety Device• Connect the centrifuge to power and switch ON• Check for easy lid closing and self-acting lid opening - if in disorder, readjust lid’s swivel hinge

and/or lock assembly • Check the central rubber gasket for lid sealing and replace it, if damaged• For checking the electrical safety circuit: start the centrifuge, let it shortly run and stop it, the lid

must not be unlocked by the microprocessor until the “end” message is shown on the display - ifsafety circuit is out of function, replace the main board

2.1.1.4 Cleanliness of Spin Chamber and Motor Casing• Open the lid and remove the rotor (for loosening turn socket wrench in arrow • Direction - see rim of rotor chamber)• Clean the spin chamber with a dry and absorbent cloth (remove all dust and moisture - see also

2.5 Cleaning)• Check the cleanliness of the motor casing and take care of the annular slot around the motor

shaft: penetrating fluids can damage the upper motor baring, remove fluids with an injectorand/or absorbent paper

2.1.1.5 Rotor and Accessories Condition and Sealing• Check the condition of rotors and accessory parts (especially all supporting or stressed

partitions): the rotor and/or accessory parts must not be used any longer, if there are visibletraces of mechanical damage or rust

• Check the condition of rotor and/or accessory sealing and replace them in case of malfunction

Service


Servicing Schedule

2.1.1.6 Rotor Fixing and Motor Shaft• Check the trouble-free condition of the locking nut and replace it in case of malfunction• Check the condition of the drive motor shaft: the centrifuge must not be used any longer, if the

drive shaft is damaged (bend, thread is worn out, horizontal grooves etc.)

2.1.1.7 Temperature Level• Check the air inlet underneath the lid and under the bottom plate for free ventilation, insufficient

air flow will lead to temperature rise of rotor, motor and electronic parts• Check the condition of the rubber wave of the lid sealing, the noise level will be increased, if the

wave is deformed

2.1.2 Maintenance Routine after Dismantling the Centrifuge Casing

2.1.2.1 Motor Supporting Elements• Check the supporting and damping elements of the drive motor and replace them at every

inspection of the unit. Recommended once a year. A service kit 70902000 is available.

2.1.2.2 Braking Circuit• Check the function of the braking circuit (warming up of brake resistor, even and noiseless brake

effect) and replace defective parts in case of malfunction

2.1.2.3 Lead and Screwing Connection• Check the terminal and plug connections of all leads and on all boards and electrical

components, tighten all loosen screwing connections, refit or replace defective parts• Check the screwing connections of all boards, mechanical and electrical components and re-

tighten them if necessary (use screw locking lac for motor mounts and lid lock assembly)

2.1.2.4 Protection Earth Core and Grounding Connections• Check the protection earth core for continuity and all grounding plug connectors • Check isolation resistance and accessible current (see 2.5)

Service


2.2 Trouble Shooting

ErrorIndication Error Cause Possible Error

Source Corrective Procedure

Mains fuse or circuitbreaker failed

Check fuse or circuit breaker, replace orswitch on again

Defective mains cordor switch or

instrument socket

Check instrument cord, switch and socket,replace defective parts

No mainsvoltagesupply

Defective unit fuse orfuses on main board

Replace it, if fuse blows again, disconnectelectrical parts, otherwise search other faults

Faulty connectionfrom CPU to

indication board

Check connections on CPU, indicat. Board andconnecting leads, replace defective parts

No lowvoltage

supply for thekey and

display boardFaulty indication or

CPU board Replace main board completely

Displaysremain

dark

Interruptionof runningprogram

NV-RAM out ofsocket or not

correctly placed

Insert the valid NV-RAM and push it correctlyinto socket

Reduced voltagesupply (<10%)

If the voltage drops often, use a voltagestabilizerAll display

elementsare shortlyilluminated

CPU startsthe program

again(Reset), maybe caused by

EMI

Bad or missingground connection

Check all ground connections and screwing ofall boards

Rotor not symmetri-cally loaded

Open lid, check rotor loading, close lid againand restart

Base is not sturdyenough and comes

into vibrations

Change or reinforce the base (table, lorry withlockable wheels, etc.)

Centrifuge is notcorrectly leveled

Level the centrifuge correctly, use a spirit levelon top of unit

Rotor itself has im-balance (mechanical

cause)

Rotor must no longer be used, send back toKendro for inspection

Centrifugemakesheavy

vibrations

Imbalancerun

Drive shaft bent orrotor fixing is

damaged

Centrifuge must no longer be used, replace nutand/or motor

Service


Trouble Shooting



Wear out of motorrubber mount

Replace motor rubber mounts(at least every three years)Mechanics

Motor bearing Change motor completelyDefective terminalconnection, faulty

lead or motor winding

Check voltage on motor terminal and windingresistances -see test points on boards

Drivemakes

noises-nogood

separationresult

Electrical

Defective driving Replace complete main boardMissing mains

voltageRemedy see above, manual opening only at

standstillPTC resistor has

releasedAfter a waiting time of 1-2 minutes press key

again

Lid coil is notor not

sufficientlysupplied with

voltage Faulty driving or triaccircuit Replace the complete main board

Faulty lid coil Faulty winding of coil Replace complete lid lockLid bolt is jamming Push lid into lock and press the key again

Lid cannotbe opened

by keypressure atstandstill

Lid is notcorrectlylocked

Lid is deformed ordis-adjusted Readjust the lid centrically

Lid wasopened

manuallyduring run

Forbidden interventionemergency openingdevice must only be

used at standstill

Close lid immediately, turn power off/on, waitfor termination of br phase until end message

appears

Defective microswitch or leads or

connectors to microswitch are interrupted

Check leads and connectors to micro switch, incase of a faulty micro switch, replace lid lock

device completely

Let motor cool down, then check temperatureswitch and leads with Ohmmeter

Check air cooling, circulation

“LId“message

appears inspeeddisplay

Protectioncircuit (15V)for lid and

motortemperaturecontrol wasinterruptedduring run

Motor over-temperature switch

has tripped (nosufficient air flow ormotor has run on 2

phases only)Check solderless connections XM1-3 andmotor windings, replace defective parts

Service


Trouble Shooting



Micro switch Check leads and micro switch“OP“messagein timedisplay

15V supplycircuit is

interrupted atstandstill

Motor over-temperature switch

Check motor over-temp. Switch and leads,replace defective parts

Short interruption ofmains supply

Wait for rotor standstill (appr. 75 seconds) andre-start“br “

messagein speeddisplay

Rotor comesto standstill

withoutbraking force

Bad contact ofinstrument supply

line

Check plug contacts of supply line and replacedefective parts if necessary

Missing bridge atplug XE Place wire bridge at plug XE“bAL“

messagein speeddisplay

Imbalancedetection has

tripped Circuits on the mainboard are faulty Replace the main board

Rotor is jammed Check for easy rotor movement, remove anyjamming objectsRotor didn’t

turn Motor is jammed Replace motorConnections inter

drive and main boardCheck terminal and lead connections, replace

faulty parts

Defective drive Check resistance of motor windings, replacefaulty parts

Motor didn’tstart

Faulty main board Remove main board completely and replace it

E- “ “ 0“messagein speedand time

field

Motor didn’taccelerate

False rotationdirection Change 2 motor connection lines XM

Defective leads orbrake resistor Replace main board completely“E- “ “ 8“

message

Over-voltageof

intermediatecircuit

Driving and/orbraking circuits Replace main board completely

“E- “ “10“message

Checksumerror of NV-

RAM

NV-RAM is notinitialized or false

Check NV-RAM and socket, insert the correctNV-RAM

Sporadic: strongelectromagnetic

disturbance

Screen the disturbance source or operate thecentrifuge on another place“E- “ “11“

message

Disturbeddata transfer

from NV-RAM Continuously: error

on main board Replace main board completely

Service


2.3 Test Points

Test Points Unit value ConditionsMains termin. XNunit’s resistance

120/230/(100)VAC (±10%) All given values refer either to 100V, 120V or 230V 50/60Hz

Terminal XMmotor voltage-values must be

the same betweenall 3 motor leads

110(116)V AC155(145)V AC210(186)V AC

Rotor #3243, In each case measured inter 2 motor leads after reaching theselected speed3000rpm6000rpm13000rpm, acc.time: 13s, dec.time: 13s

Motor current IMcable 1, 2, 3

3x1,4A3x0,6A3x2,1A

Soft iron or digital effective measuring instrument Maximum during acceleration, set speed = 13000rpmMaximum during braking phase

Intermediatevoltage UD

(brake resistor ->current controlresistor R44)

325(275)V DC350(300)V DC

310(255)V DC280(225)V DC

At standstillMax. During braking phase Set speed = 13000rpmShortly at maximum acceleration

Current ID ofintermediate

circuit, (throughcontrol resistor

R44)UM = ID x RM

12(16)mV DC20(24)mV DC90(98)mV DC230(270)mV

DC-65mV DC

Set speed = 3000rpmSet speed = 6000rpmSet speed = 13000rpmShortly by max. acceleration

Shortly at maximum accelerationMotor winding

resistance 20°C-insulation value

3 x 11Ω

> 10MΩ

Switch OFF unit, pull off motor plugs, measure inter 1 -> 2, 2 -> 3, 3 -> 1Resistance inter each phase and motor casing

Brake resistorR51 line soldered 220 Ω Switch OFF unit, resistance at 20°C

Lid solenoidconnectors XC 55/40/210 Ω

Switch OFF unit, resistance at 20°CLid lock 100V/120V/230V

Lid switchplug XA 15V DC Voltage drop – lid open

Motor over-temp.connectors XB 15V DC Voltage drop – lid closed and one lead disconnected

Service


2.4 Cleaning of Instrument Parts

ATTENTION - WARNING!The electrical and electronic components must not be cleaned with moist detergents!

For Cleaning the centrifuge housing or its accessories see Operating Instructions section 1(maintenance and care).

• Electronic componentsClean dusty components carefully with a dry and soft brush and remove loose dust with a vacuumcleaner

• Vent holesRemove dirt from vent holes of lid or bottom plate using a brush and vacuum cleaner

2.5 Electrical Safety Check

ATTENTION!A final electrical safety check must be performed after each maintenance and/or repair!

• Resistance check of protective conductorThe measuring value of the resistance between the mains plug's grounding pin and the groundingconductors of the motor, electronic chassis and the casing must not exceed 200 mΩ.

• Insulation resistance CheckCheck also the insulation resistance between the poles of the mains plug and the groundingconductor; the resistance value must be more than 2 MΩ.

• Accessible current measured to EN 61 010The accessible current must not exceed 3.5 mAmps in single fault condition (interrupted protectionearth wire)! In accordance with the EN61010, IEC1010 and UL3101 such a fault condition can bereproduced by the following measuring circuit.

500Ω±1%

L (N)N (L)PE

10kΩ±5%

0,022µF±5%

VAC

0,22µF±5%

Steckergehäuse / plug-in casing

Spezifaktionen für Meßgerät- TRMS, DC - 5kHz oder mehr- Eingangswiderstand > 1M- Toleranz 5% oder besser- Crest Faktor 5 oder besser

Ω

Specifaction for the meter- TRMS, DC - 5kHz or more- Input resistance > 1M- Tolerance 5% or better- Crest Factor 5 or better

Ω

Körperstrom:accessible current: I [mA] = U [mV] / 500:

U = 1750mV I = 3,5mAmax max≡

Functional Description


3.1 Block FunctionsThe accuSpin® micro is a microprocessor controlled laboratory tabletop centrifuge with induction drivemotor and integrated air cooling system.

The unit incorporates following boards and components (see block diagram 4-1):• Two poles mains switch with integrated instrument plug for mains cable mounted on the unit's

back side• Main board with microprocessor part and power electronics, 2 fuses are serving for board

protection• Key and indication board (EASYCONTROL programming without temperature display)• 3 phase induction motor with integrated thermal over-temperature switch (C. O. 140°C)• Lid lock assembly with solenoid and integrated micro switch (mechanical bolt keeper, magnetic

unlocking), mounted under the casing's right side• Brake resistor (part of main board) is mounted onto the ground plate

3.2 Main Board FunctionsThe main board is mounted on the ground plate in front of the drive.The components on main board are arranged in following groups (see wiring diagram page 4-2 and4-3).• Fusing (2 x 4/4/2 Amps. Slow blow), noise filter in accordance with EN 55011• Power pack for low voltage supply of microprocessor part (physically separated by transformer)

and power electronics (mains potential)• Triac control circuit for lid solenoid ( DC supply via bridge rectifier)• Bridge rectifier for DC intermediate circuit supplying brake control path and frequency converter• Microprocessor part with controller (CPU) and ASIC80 component• Exchangeable NV-RAM containing specific data• Power part inclusive physically separated driving stages

3.2.1 Power PackThe power pack (transformer, bridge rectifier and voltage regulator) generates:• U1 = 5 V supplies the CPU part on main and indication board

Reference potential A1: connected to protective conductor (GND)• U2 = 15 V (generated by one way rectifying) supplies lower HGTPs of power

Electronics via the protection circuit of closed lid switch and motor over-temperatureswitch (normal closed)Reference potential: A2! Mains potential!EXERCISE CAUTION when measuring etc.



Main Board Functions

3.2.2 Intermediate Circuit with Brake Path and Frequency ConverterThe DC intermediate circuit serves as an energy store between the AC power input and thetransmitted motor performance. The intermediate circuit consists of a bridge rectifier and reservoircapacitors which are softly charged via NTC resistor, continuously supplied during operation andslowly discharged after power off. The 100/120V variant has a voltage doubling stage (two diodes forcharging two serial connected reservoir capacitors).

Brake PathElectrical power can be fed back into the intermediate circuit during motor deceleration (motor acts asgenerator). This braking power is transformed into heat by the line soldered resistor so that theintermediate circuit voltage does not rise to an excessive level. The brake resistor is switched into theintermediate circuit by a fast switching transistor (pulse-width modulation, synchronized by mainsfrequency). This FET is voltage dependent controlled by a self-acting stage (closed loop).

Frequency ConverterThe motor is 3-phased provided with chopped direct voltage blocks. These blocks are variable infrequency and pulse-width modulation, de-phased to 120°. These 3 phases are controlled duringacceleration, running at set speed and deceleration (e.g. for small speed low frequency and smallpulse-width length will be affected) The frequency converter is protected against over-current andover-voltage.

3.2.3 Microcontroller (Central Processing Unit) PartThe software identification numbers of the CPU 80C52 and data storage (NV-RAM) 9346 aredisplayed in speed and time fields in sequence:

• CPU: 484 xx• NV-RAM: 1072 xx

The actually indicated version numbers (xx) are displayed in the time field and will be upgraded ifprogram or data changes are necessary. The control program (ROM) is integrated in the controllercomponent. The most important operating parameters (e.g. the maximum speed and the last operatorsettings) are stored in the non volatile (NV)-RAM. The CPU cooperates with the ASIC 80 componentvia the 8 bit data bus and some control lines. The ASIC 80 is a specially designed integrated circuitfor the driving of Kendro centrifuges with induction motor, containing some protecting functions of thepower electronics. The CPU signal to unlock the lid is combined with the reset controller chip, thismeasure makes sure that the lid cannot be opened in case of a power failure.



3.3 Key and Indication Board (Part of Main Board)The key and indication board is mounted behind the operating panel. The connection to the mainboard is done by a 14 polar flat cable. The 7-segment displays, the control LED’s and the operatingkeys are managed by the CPU by multiplex processing. For the programming servesEASYCONTROL (see Operating Instruction Manual).

Function of keys and indicating elements

Keys Name Function(s)

S1 Lid symbol To open the lid (only possible at standstill) – else error behavior(PTC is heated up)

S2 Double arrow Quick run, to start - keep the key pressedS3 Square symbol Stop, to terminate the centrifugal run manuallyS4 Arrow to right Start, to set a centrifugal run in rotation

S5 Speed arrowdown To decrease the value of the set speed

S6 Speed arrowup To increase the value of the set speed

S7 Time arrow down To decrease the value of the set timeS8 Time arrow up To increase the value of the set time

Indicator Name Function(s)

H1,H2 Time range

Indication of centrifugation time and hold (hd), • Right part of software identification numbers of CPU and NV-

RAM• Actual version numbers (“xx“)• Lid OPEN condition (“OP“)• Code numbers of error messages

H3 - H5 Speed range

Indication of speed [x1000 (rpm)] • Left part of software identification number• Run finished (“End“)• Error messages like (“lid“, “E- “)

H6 - H9 Rotation LED’s Indication of rotation after starting till “End“

x1000

4 - 1

Block Diagram

EASYCONTROL

key andindication part

unlocking solenoidlid switch

S1 Y1

XA XC

brake resistor

R51

MAIN BOARD (controller and power electronics)

motorovertemp. switch

F3

M1

XB XM

Legend

solder connection

plug connection

mains

mainscord

S0

XF

XF

F2

F1XL,XN

X0mains switch

instrument plug

3

NV-RAM

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Schematic Diagram

PTC

7805

transformer, rectifiers and regulators

F1*

lid switch

15V + standstill: "OP""LId"

lid solenoid 100-120V: 25

S1

F2*

XL

instrument plugwith mains switch

XN

XPE

3

4

5V (VCC)

PEchassis

PEmotor

PElid lock

2AT

2AT

*100/120V: 4AT

XA/2XA/1 XB/1 XB/2 XC/1 XC/2

Y1

NTC

autom. brake control

brake resistor 220

1

2

R51

+15V

DC intermediate circuit

0V=A2

A1=GND

driving of HGTPs (frequency converter)

noisefilter

15V + run:

S0

MAIN BOARD part 1

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Schematic Diagram

1

2

XM/1 XM/2 XM/3

F3

M1

overtemperature switch

motor

3

4

U1 (5V)A1 = GND

U1 (5V)A1

U2 (15V)

A2 R44

frequency converter

µP part

key and indication part

EASYCONTROL

MAIN BOARD part 2

ASIC80

dyndyn

dyn

CPU NV-RAM

physical separation

INHIBIT

RESET

2x6 HGTPs

Y1

Û “E-” “ 8”

“E-” “ 0”

"LId"

ii

i

15V “LId”...

"LId"

"OP"

13 8 4

3

XF

H1

H6H8

H9H7

H2H3 H4 H5

XF14

3

S1S2

S4 S3 S8 S7

S6S5

A,BF,E

8

A,B,C,DE,F,G,DP

UD-*

UD+

current control res.

MUX

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Wiring Diagram

WHT main board XN

BLK main board XL

BLK unit plug /L

WHT unit plug /N

GRNYEL PE connect.

connection unit plug and switch element

wiring guidance

MAIN BOARD

XN

XL

brake resistor R51

XA

XB2

XB1

XClid solenoid

motor overtemp.

X1

X2

X3

3

1

2 motor

Motor /1

Motor /2

Motor /3

lid switch

PE connector

ground plate

mounting PE connector

connection to key andindication board

PElid lock assy

wiring guidanceof motor leads

3x fan washer 4,3mm1x nut M4

mounting of board attachment

oval head screw M4x8lock washer VSK4

oval head screw M4x8lock washer VSK4

spacer

cicuit board

ground plate

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Wiring Diagram

PE connectorof ground plate

main boardplug XA

main boardplugs XC1, XC2

connection of lid lock assembly

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Component Plan of Main Board 293 (120V)

ba

gc

d

f

7 6

e

8910

1 2 3 4 5

DP

7 68910

H1 - H5 HDSP5551seven segment LEDs

distance plate

PCB

1mm

H6 - H9

AK

LEDs8.5mm

distance 12mm

HLMP 3mm

mounting of heavy load resistorR50

1 2 3 4 5

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Wiring Diagram main board Overview;

120V 230V20150293 20150294

100V20150292

mains voltage:main board:

Output Stage

+15

U+

PHASE1_U

PHASE3_OPHASE3_U

PHASE2_UPHASE2_O

PHASE1_OINHIBIT

U-*

Protection Circuit

+15

U+

ZK2

U0

U-

DECKELAUF

/UEBERSPANNUNG

UEBERSTROM

U-*

Controller

PHASE1_U

PHASE2_U

PHASE3_UPHASE3_O

PHASE2_O

PHASE1_O

DECKELAUF

/UEBERSPANNUNG

INHIBIT

DECKELSCHLOSS

UEBERSTROM

Power Supply

U-

U0

ZK2

U+

DECKELSCHLOSS

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Wiring Diagram Mainboard; Power Supply

Intermediate Circuit

Intermediate Circuit 2

Noise Filter

Power Connection

Lid solenoid

Lid Control

Different parts at 100V / 120V / 230V version

C3622nY

C46

120V: 470u 200V230V: 220u 400V

100V: 470u 200V

C47

120V: 470u 200V230V: wire link

100V: 470u 200V

+

R55150kSMD

C48220n400V

R63220RSMD

R64220RSMD

R56150kSMD

C4422nX

T1100V: 100V/9V

120V: 120V/ 10V230V: 230V/9V

R60V275LA40A

only at 230VVDR

U

F2

R59150kSMD

R58150kSMD

XLSTECKER6.3MM

XNSTECKER6.3MM

XC2STECKER6.3MM

XC1STECKER6.3MM

C37100nSMD

V267805

VI2

GND

1

VO 3

L1

120V: 2 x 2.7mH 4A230V:

100V: 2 x 2.7mH 4A

2 x 5.6mH 2A

F1, F2100V: 4AT120V: 4AT230V: 2AT

1

2 4

3

V31SM4007SMD

V30SM4007SMD

V33SM4007SMD

V32SM4007SMD

R575R

NTC

C38100nSMD

R5410120V:

0V: PTC 10R 2,2APTC 10R 2,2A

230V: PTC 15R 1,5A

C390u6X

C411000u25V

+ C4210uSMD 25V TA

+

F1

V41SM4007SMD

V37SM4007SMD

Br1BR_POWER

1 2

C434n7

Y

C404n7

Y

V28SM4007SMD

V35P600K

V34P600K

V39P600K

only at 230V

V40P600K

only at 230V

only at 230V

only at 230V

V29SM4007

SMD

V38SM4007

SMD

+

R66220RSMD

R67220RSMD

Br2BR_POWER

1 2

R65330RSMD

V27T1213

R531kSMD

D19S21ME4

6 1

24

V36SM4007SMD

GND

GND

VCC

U+

U-

U0

ZK2

DECKELSCHLOSS

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Wiring Diagram Main board; Protection Circuit

active when motor feeds energyback into DC intermediate circuit(works as generator during braking phase)

relative over-voltage controlactive if brake resistor is defectiveor mains supply is much too high

absolute over-voltage detection

R5215RSMD

C3410uSMD 25V TA

+

XA12

C28100u40V

+

D16SFH6106-3SMD

1

2

3

4

D17SFH6106-3SMD

1

2

3

4

D18SFH6106-3SMD

1

2

3

4

V23ZMM15

SMDR36

2M2SMD

R4168kSMDR45

10kSMD 1%

R47470kSMD 1%

R46470kSMD 1%

R48470kSMD 1%

R49470kSMD 1%

R3710kSMD 1%

R44 0R15 2W

V22BC817

V21BC817

C3010nSMD

C2910n

SMD

R3822kSMD

R4322k

SMD

R40

R39

2k2 SMD

2k2 SMD

V24P6KE440A

R4222k

SMD

XB1STECKER6.3MM

XB2STECKER6.3MM

C3322p

SMD

D15TL081SMD

3

2

1 5

6

7

4

+

-

R51220R50W

C31100nSMD

C32100nSMD

R508k211W

VCC

GND

GND

U0

U-

U+

DECKELAUF

+15

ZK2

/UEBERSPANNUNG

UEBERSTROM

U-*

Overcurrent

Lid openSignal

Signal

DC Voltage Control

Overcurrant Recognition

Lid SwitchMotor Overtemp. Protector

Brake Resistor

R89V275LA4

only at 100V

U

only at 100V

C6710n

VCC

V25P7NB60

Different parts at 100V / 120V / 230V version

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Wiring Diagram main board; Output Stage

V3LL4148

V4LL4148

V5LL4148

V6LL4148

V7LL4148

V8LL4148

D9A

74HC14SMD

74HC14SMD

74HC14SMD

74HC14SMD

74HC14SMD

1 2

D10A

1 2

D9F

13 12

D10F

13 12

D10C

5 6

D10D

74HC14SMD

9 8

D10E

74HC14SMD

11 10

D9E

74HC14SMD

11 10

D10B

74HC14SMD

3 4

D9B

74HC14SMD

3 4

D9D

74HC14SMD

9 8

C9100nSMD

V18LL4148

V19LL4148

V20LL4148

C10

10nSMD

V15ZMM15SMD

V17ZMM15SMD

V16ZMM15SMD

R2

220RSMD

220RSMD

220RSMD

220RSMD

R3

R4

X1STECKER6.3MM

X2STECKER6.3MM

X3STECKER6.3MM

R261MSMD

R271MSMD

R291MSMD

R281MSMD

R301MSMD

R311MSMD

C1210uSMD 25V TA

C1310uSMD 25V TA

C1410uSMD 25V TA

+

V1BC807

D9C

74HC14SMD

5 6

R1

R5

R6

220RSMD

220RSMD

220RSMD

220RSMD

220RSMD

220RSMD

220RSMD

220RSMD

R7

C211nSMD

C2211nSMD

C2411nSMD

C2511nSMD

C2611nSMD

C2311nSMD

R8

R9

R10

R13

47kSMD

R11

V9IRG4BC20KD

V10IRG4BC20KD

V11IRG4BC20KD

V12IRG4BC20KD

V13IRG4BC20KD

V14IRG4BC20KDR12

C8100nSMD

C1100nSMD R32

47kSMD

C2710uSMD 25V TA

+

R20

15RSMD

15RSMD

15RSMD

15RSMD

15RSMD

15RSMD

R21

R22

R23

R24

R25

V2BC807 R33

82k2W

82k2W

82k2W

R34

C15100nSMD

C18100nSMD

C16100nSMD

C20100nSMD

C17100nSMD

C19100nSMD

R35

D11SFH6106-3SMD

D12SFH6106-3SMD

D13SFH6106-3SMD

D1SFH6106-3SMD

1

1

1

1

1

1

1

1

1

1

1

1

2

2

2

2

2

2

2

2

2

2

2

2

3

3

3

3

3

3

3

3

3

3

3

3

4

4

4

4

4

4

4

4

4

4

4

4

D14SFH6106-3SMD

D2SFH6106-3SMD

D3SFH6106-3SMD

+

+

D4SFH6106-3SMD

D5SFH6106-3SMD

D6SFH6106-3SMD

C1110u

SMD 25V TA

+

D7SFH6106-3SMD

D8SFH6106-3SMD

C2220pSMD

C3220pSMD

C4220pSMD

C5220pSMD

C6220pSMD

C7220pSMD

R1439kSMD

R1739kSMD

R1539kSMD

R1839kSMD

R1639kSMD

R1939kSMD

GND GND

GND

GND

GND

GND

GND

GND

GND GND

GND

VCC

VCC

VCC

VCC

VCC

VCC

VCC

U+

+15

Phase3_U

Phase3_O

PHASE2_U

PHASE2_O

PHASE1_U

PHASE1_O

INHIBIT

U-*

drive motor

M3~

19.02.03 AH

Edition: 01

DIAGRAMS

accuSpin MicroTM

4 - 11

Wiring Diagram Main board; Controller

H7 LED

GN 3MM

H8 LED

GN 3MM

H9 LED GN 3MM

R88

220RSMD

D2274HCT138SMD

A1B2C3

G16G2A4G2B5

Y0 15Y1 14Y2 13Y3 12Y4 11Y5 10Y6 9Y7 7

VC

C

16

GN

D

8

C60100nSMD

XF1

DIP14

11

22

33

44

55

6677 8 89 910 1011 1112 1213 1314 14

S7

D21

ASIC80

GND10VDD11ALE12A013A114A215DREHZ_IN16DREHZ_OUT17VDD18WR_6X19WR_7X20TEMP221MODE22RESET23BIT924INH_IN25TEST26

D7

9D

68

D5

7D

46

D3

5D

24

D1

3D

02

GN

D1

VD

D6

8W

R6

7R

D6

6T

OU

T6

5T

E6

4T

EM

P5

63

TE

MP

46

2T

EM

P3

61

GND 60PH1_O 59PH2_O 58PH3_O 57PH1_U 56PH2_U 55PH3_U 54

GND 53VDD 52

TAKT55_IN 51TAKT55_OUT 50

TAKT11_IN 49PWM_IN 48

PWM_OUT1 47PWM_OUT0 46

F_IN 45F_OUT 44

Q_

OU

T2

7Q

_IN

28

TAK

T_

02

9TA

KT

_1

30

RD

_4

X3

1R

D_

5X

32

TE

MP

ER

AT

UR

33

INT

ER

RU

PT

34

GN

D3

5T

EM

P1

36

TE

MP

03

7V

DD

38

FE

HL

ER

39

UE

BE

RS

P4

0IN

H_

O0

41

INH

_O

14

2G

ND

43

C61100nSMD

V51

D23F

74HC14 SMD

1312

S8

C56100nSMD

C57100nSMD

C58100nSMD

C59100nSMD

XD

Burndy 4pol

1234

V53

R8322k

SMD

D26

74HC573 SMD

D12 Q1 19

D23 Q2 18

D34 Q3 17

D45 Q4 16

D56 Q5 15

D67 Q6 14

D78 Q7 13

D89 Q8 12

C11

OC1

H3TDSG5150 M

H4TDSG5150 M

H5TDSG5150 M

7 6 4 2 1 9 10

5 3

ab

cd

e

fg

dp

a b c d e f g dp A

H1TDSG5150 M

H2TDSG5150 M

7 6 4 2 1 9 10

5 3

ab

cd

e

fg

dp

a b c d e f g dp A

V55BC807

7 6 4 2 1 9 10

5 3

ab

cd

e

fg

dp

a b c d e f g dp A

R851kSMD

R861kSMD

R871kSMD

V57BC807

V56BC807

V44BC807

V42BC807

7 6 4 2 1 9 10

5 3

ab

cd

e

fg

dp

a b c d e f g dp A

C65

10uSMD 25V TA

10uSMD 25V TA

+

R791kSMD

R691kSMD

7 6 4 2 1 9 10

5 3

ab

cd

e

fg

dp

a b c d e f g dp A

H6 LED GN 3MM

V43BC807

R681kSMD

D24

TL7705 SMD

REF1

RESIN2

CT3

GND4

VCC 8SENSE 7RESET 6RESET 5

C50100nSMD

D25

80C52PLCC PROG 0484

EA/VP35

X121

X220

RESET10

INT014INT115T016T117

P1.02P1.13P1.24P1.35P1.46P1.57P1.68P1.79

P0.0 43P0.1 42P0.2 41P0.3 40P0.4 39P0.5 38P0.6 37P0.7 36

P2.0 24P2.1 25P2.2 26P2.3 27P2.4 28P2.5 29P2.6 30P2.7 31

RD 19WR 18

PSEN 32ALE/PALE/ 33

TXD 13RXD 11

R7810k

SMD

D23B

74HC14 SMD

34

D23D

74HC14 SMD

98

XF2

DIP14

11

22

33

44

55

66

77 8 89 910 1011 1112 1213 1314 14

D23E

74HC14 SMD

11 10

V45

R80

220RSMD

V46 V47 V48

R904,7k

R8122kSMD V49

R82

4k7 SMD

D23A

74HC14SMD

12

V50

S1 S2 S3 S4 S5 S6R842k2SMD

C53100nSMD

C54100nSMD

C52 22p SMD

C55100nSMD

C5 122p SMD

C6310uSMD 25V TA

+

C64+

C621uSMD 35V TA

+

XEJST 3pol

Imbalance switch

123

J1J 11.0592

D23C

74HC14SMD

5 6

D20

9346

CS 1SK 2DI 3DO 4GND5

VCC8NC6NC7

A/RESET

B

FABCDEF EG

/DECKELAUF/DECKEL

/DECKEL

/RESET

A B C D E F

A

G

B C D E F

A

G

B C D E F

A

G

B C D E F G A B C D E F G

AD6

AD7

AD1

GN

D

WR_6X

AD6

AD

4

GND

AD4

INH

GN

D

AD

7

GND

AD1

AD5

GN

DG

ND

GND

/WR/RD

/WR

/RD

AD0

INH

ALE

AD

1

GND

AD7

AD4

AD0

AD

5A

D6

ALE

AD5

GND

AD

0

GND

GND

WR_6X

GND

DP DP DP

DPDP

DP

AD

2

AD2

AD2

VDD

VD

D

VDD

ER

RO

R

ERROR

VDDVDD

VD

D

AD3

AD3

AD

3

VCC

VCC

VCC VDD

VCC

VDD

VCC

VCCGND

GND

GNDGND GND

GND VSS

GND

GND

GND

VCC

GND

GND

GND

GND

GND

GND

VCC

VCC

VCC

INHIBIT

DECKELAUF

/UEBERSPANNUNG

DECKELSCHLOSS

UEBERSTROM

PHASE1_O

PHASE3_UPHASE2_UPHASE1_UPHASE3_OPHASE2_O

Time

>

>>><

8-BIT-Modus

/Strom

PC

Speed

S1 = LIDS2 = QRS3 = STOPS4 = STARTS5 = -DREHS6 = +DREHS7 = -TIMES8 = +TIME

Flachbandkabel14-pol. 165mm

R70..R778x220R SMD

19.02.03 AH

Edition: 01

DIAGRAMS

accuSpin MicroTM

Disassembly


The index numbers stated in ( ) reappear within the breakdown drawings and the spare part lists

5.1 Dismantling the Housing5.1.1 Casing (100)• Open the lid. Pull out the mains plug.• Unscrew and remove the rotor.• Put the instrument parallel and close to the table's rim, remove the Allen screws from both rubber

feet on this side, then put the device around and remove the opposite screws in the same manner.• Press the casing up in front of the bottom plate and tilt it to the rear.

ATTENTION! Support the casing with the rotor placed behind the instrument to avoid stressing theconnecting lines inter main board and lid lock assembly.

• Unplug the micro switch line from the 2 poles socket and remove the solderless single plugs of thelid solenoid and the PE connection by using cranked pliers (lift the insulation cover before toprevent them from being damaged).

• Remove the casing.

When refitting the casing take care of the correct placement of the protective plastic form (223) (thereis a slot on the plastic form which has to be pushed across the connecting lead close to indicationboard) to). This plastic form prevents the main board from being damaged by inadvertently spilledfluids entering the lid slot.

5.1.2 Dismounting the Lid (110)• Dismantle the casing - see 5.1.1• Use two adequate screw drivers at the same time to loosen one of the two lid screwings (114).• Lay the casing down on its side, keep the lid axle (116) tight by using any pliers and remove the

second lid screwing.• Pull the lid off of the casing.To reassemble the lid first replace both screwings by hand and re-tighten them by using both screwdrivers at the same time.

5.1.3 Dismantling the Casing (120)• Dismantle the casing - see 5.1.1• Remove both counter-sunk screws (58) and the self-locking nuts (121)• Take out the mounting angle incorporating the lid locking system.• Reassemble the new lid lock assembly analogously in reverse order.

Before replacing the casing check the lid's correct closing and opening functions. Take care of thecorrect plastic forms placement (see 5.1.1).

Disassembly


5.2 Replacement of Electrical Components

5.2.1 Fuses on Main Board (221)• Dismantle the casing (see 5.1.1).• Check the micro fuses and if necessary replace them by equivalent and undamaged ones.• Perform a test run and search for blowing cause.• Reassemble the device analogously in reverse order.

5.2.2 NV-RAM on Main Board (222)Please note that Software does not belong to the board. It has to be ordered as single spare part.• Notice old displayed NV-RAM's version number when powering on (second No. in sequence)• Remove the casing as described in 5.1.1.• ATTENTION - CMOS components !

Discharge your body before handling!Notice correct position of NV-RAM (8 pins) and pull carefully out of socket.

• Reinsert the new NV-RAM correctly.• Reassemble the device analogously in reverse order and check the displayed NV-RAM's version

number.Note! A new NV-RAM version number will usually include parameter changes (e.g. any speedlimitations etc.) which can be verified in the display.

5.2.3 Main Board Replacement (220)ATTENTION! The key and indication board as well as the brake resistor are parts of the main boardand cannot be ordered separately!• Dismantle the casing as described in 5.1.1.• Disconnect all single plug connectors as: mains supply XL XN, lid solenoid XC motor lines XM (1-3) and over-temperature cut-out XB (1+2) (use pliers).• Pull out protecting earth conductor PE and plug for lid switch XA.• Remove all screwings of the main (37) and indication board (30) and of brake resistor (34),

remove the washers (4) / (3) and remove the parts.• Touch a grounded receptacle to discharge your body before touching the sensitive CMOS

components!Take the new NV-RAM (222) out of box (or re-use the old but trouble-free component) and insert itinto the socket of the new main board (if necessary, remove a placed but non programmed NV-RAM before)

• Mount the parts of the new board onto the spacers completely with all washers, screws and nutstake care of the plastic form (223) and tighten the brake resistor

• Do not mix up disconnected cables during re-connection!Reassemble the device in reverse order and perform a test run, making sure the drive turns in theright direction (see imprinted arrow on rim of rotor chamber)!

Disassembly


5.3 Replacement of Drive Components

5.3.1 Disassembly of Drive Motor (230)• Remove the casing (see 5.1.3).• Disconnect the leads for motor XM (1-3), over-temperature switch XB (1+2) and grounding PE.• Set the wires free from cable harness.• Unscrew the 3 nuts (60) and remove them together with the lock washers (6).• Lift the motor out of the rubber mount and remove the motor from the bottom plate.• Reassemble the motor analogously in reverse order and fasten the 3 nuts and lock them with

Loctite 221.• Perform a test run. Check the sense of rotation (see imprinted arrow direction) and mix up 2 leads

on terminal XM (1-3) in case of disorder.

5.3.2 Motor supports (235)All 3 rubber supports (235) have to be replaced at once in a regular interval.We recommend to do this during every service visit. A service kit 7090200 is available. By the way the 6 double-sided sandpaper discs (234) mustbe exchanged, too.

• Unscrew the drive motor (see 5.3.1) and lay the bottom plate together with electronics and motoronto the side.

• Unscrew the 3 nuts (60) from the bottom plate and take the rubber supports out of the borings ofthe bottom plate.

• Install the new rubber mounts together with new sandpaper disks, replace the lock washers,tighten the nuts evenly (use a torque wrench: 10 Nm) and secure them with screw locking lac(Loctite 221).

• Replace the bottom plate onto the feet, mount sandpaper disk, motor and lock washer and tightenthe 3 nuts evenly (use a torque wrench: 10 Nm) and secure them with screw locking lac (Loctite221).

• Reassemble the device in reverse order.• At last perform a test run.

6 - 1

Housing Parts

x1000x1000

119

112

110

117

115

114

100

202

72

58

116

115

118

55104

106

120

121

121

131

105

102

130

14.02.03 AH

Edition: 01

BREAK DOWN DRAWINGS

accuSpin MicroTM

6 - 2

Housing Parts

x1000x1000

12

3

204

6

60

56200

202

230

222

220

330

210

207

208

56

220

234

235

216

37

233

230

49

221

376

34

220

205

201

60

40

6

94

14.02.03 AH

Edition: 01

BREAK DOWN DRAWINGS

accuSpin MicroTM

Check List


1. General

Successfully completing the Preventive Maintenance Checklist and Calibration CertificationProcedure as outlined will ensure that the instrument is properly maintained and calibrated toKendro specifications.

2. Equipment Required

• Digital Multimeter• Stopwatch• Photo Tachometer• Safety Tester• accuSpinmicro Service Manual• Centrifuge Operating Manual

Note: Check calibration due date on all test equipment before starting certification.

3. Documentation Required

• Preventive Maintenance Procedure and Checklist (Service Manual)• Calibration Certification Procedure and Form• Certification Label• Certificate of calibration for each piece of test equipment used to perform the certification• Training Certificate

Preventive Maintenance Check

• Perform Preventive Maintenance checks as outlined in the Service Manual to ensure theinstrument is in good working order without performing any calibrations.

• Complete the Preventive Maintenance Checklist. (calibration data will be filled in afterCertification)

Check List


Calibration Certification

• SPEED

Install a rotor, set the speed control to 13000 rpm and start the centrifuge. When the speed hasstabilized, measure the actual speed with an external tacho (photo tacho on multimeter wherespeed = frequency[no conversion]). Record measured speed and displayed speed in the speedsection of the certification form. Set the speed control to max. rpm and after stabilization,record measured speed and displayed speed in the speed section of the certification form.Determine if the speeds recorded meet the specifications on the form. If the specifications aremet, proceed to the next section. A recalibration of the instrument is not possible.

• TIME

Using a stopwatch, check the timer by setting a 10 minute run. Start the centrifuge andmeasure from the time the start button is pushed until the timer switches to stop. Record themeasured time in the time section of the form. Determine if the time value recorded meets thespecifications in the form. If the specifications are met, proceed to the next section. Arecalibration of the instrument is not possible. Initial the time section.

• SAFETY TEST

Using safety tester and connect the centrifuge to it. Measure Insulation resistance.. Select toEarth Conductor resistance and touch with probe all mechanical part of the centrifuge.Resistance must be <0.2 ohms at all points otherwise check for good grounding. Measureaccessible current to procedure in the service manual.

Documentation

After filling in the certification information complete the following documentation:

• Log test equipment data on calibration certification form.• Review P.M.checklist and calibration certification form to ensure that all data and

required information has been recorded properly.(including your signature and date)• Fill out a certification label and place it on the right side of the centrifuge where visible or

at a location selected by the customer.• Ask the customer to sign the calibration certification form and place a copy in the

customer’s Certification Record Book for that centrifuge.• Place copies of the P.M.checklist and Field Service Report in the same Record Book.• Provide copies of your training certificate and test equipment calibration certificates if

requested by the customer


Fisher CentrifugesPREVENTIVE MAINTENANCECHECKLIST

accuSpin Micro

Type S/N

Rotor Inspection Performance Checkso Check for corrosion and wear o Acceleration time ______ secondso Inspect rotor lid locking screw o Instrument top speed _________rpm Serial numbers: o Deceleration time _______ seconds 75003243 o Time (10 minute set) ____ actual min:sec

Preliminary Checks Imbalanceo Rotor chamber (defrost) o Centrifuge stable and levelo Inst. Environment (level & clearance) o Centrifuge shuts off w/proper weight

Pre-run Checks Safety testo Ground continuity o Accessible leakage current <3500µAo Line voltage ________V AC o Insulation resistance >10 Megaohmo Display segments on power-up o Earth Conductor Resistance <0.2 Ohmo Door interlock and latcho Drive stop & Door unlatch (50 rpm)

Mechanicalo Motor bearingso Microprocessor Initialization (if required)

Comments:

Calibration Certification accuSpinmicro

Page 1

Preventive Maintenance Checklist Complete

Repair and Calibration Recertification

Account Name: Account Address:Instrument Model: Serial Number:Report Number: Date:

Performance Certification

SPEED Standard Test Rotor Used:

Set Speed (rpm) Tolerance(whichever is greater)

DisplayedSpeed(rpm)

MeasuredSpeed(rpm)

Meets Spec.(y/n)

Passed(Initials)

6000 650 rpm13000 650 rpm

Custom Test Rotor Used:650 rpm650 rpm

TIME Standard Test Rotor Used:

Timer Set(min.)

Tolerance(sec.)

MeasuredTime(m/s)

MeetsSpec.(y/n)

Passed(Initials)

10 +2%Custom Test Rotor Used:

+2%+2%+2%

TEST EQUIPMENT Type Model Serial Number Date of Next Calibration

StopwatchTemperature MeterPhoto Tachometer

Safety Tester

SAFETY TEST Insulations resistance

>10 MegaohmEarth Conductor Resistance

<0.2 OhmAccessible Current

<3500µA

Revised 17/02/03Certified By:_____________________________ Reviewed By:________________________________ Expiration Date ______ Signature Date Customer Signature DatePage 1 of 1 Use ONLY Black permanent ink when filling out. Leave NO blank spaces. Jan,2003

Spare-Part-List

FISHER ACCUSPIN MICRO 120V/60HZ75003241

Fisher Scientific

Index Partno. Text

01from Serial-No. to Serial-No.

-

00003 20480242 SECURING WASHER00004 20480244 LOCK WASHER00006 20480251 SECURING WASHER00030 20420069 HEXAGONAL NUT M300034 20460098 SCREW M 3 X 600037 20460094 SCREW M 4 X 800049 20440288 SCREW M 3 X 600055 20440285 SCREW00056 20440298 SCREW M4X1200058 20440307 SCREW M6X1200060 20420070 NUT M 600072 20510285 SCREW M5 X 1200094 20480108 FAN WASHER A 4,300100 20055918 HOUSING00102 20056212 SEAL00104 20360072 SPANNER 10 MM00105 20290607 O-ring 36,17 x 2,6200106 70056208 NUT00110 70056282 LID00111 20050543 WINDOW00112 20058002 Handle00114 20055924 NUT00115 20350211 COLLAR00116 70055921 AXIS00117 20055922 SPRING (RIGHT)00118 20055923 SPRING (LEFT)00119 20055920 LID SEAL00120 20901141 Latch 120 V JST00121 20420164 Nut M600130 75003243 FISHER MICROLITER PP-ROTOR00131 75003333 AEROSOLTIGHT CREW CAP FOR #3243&324400200 20055917 CHASSIS00201 20058200 OVERLAY Pico 120V/60Hz FISHER00202 20300101 Foot00204 20190247 MAINSCABLE00205 20180628 SOCKET00207 20055928 SPACER00208 20220416 CABLE-CLIP

Freitag, 7. März 2003

Seite 1

Spare-Part-List

FISHER ACCUSPIN MICRO 120V/60HZ75003241

Fisher Scientific

Index Partno. Text

01from Serial-No. to Serial-No.

-

00210 20220580 SPACER00216 20180138 CONNECTOR00220 20150293 Mainboard green display00221 20230136 FUSE 4 AT00222 70901072 NV-RAM00223 20055932 INSULATION FOIL00230 20210357 MOTOR00231 20490376 BRACE00232 20290567 O-RING00233 20270076 SAFTY PAINT00234 70902000 Parts f maintenance Biofuge Pico00235 70902000 Parts f maintenance Biofuge Pico

Freitag, 7. März 2003

Seite 2

accuspin micro 120 v

Documents

screw locking

software identification

calibration

lid lock assembly

preventive

dc intermediate

record measured

intermediate