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Effective
09/2005

Table Contents

INTRODUCTION

GENERAL .......................................................................................................................................................... I
FUNCTIONAL DESCRIPTION ........................................................................................................................... I

GENERAL SPECIFICATIONS AND MACHINE FEATURES ............................................................................. II

MAJOR FEATURES ................................................................................................................................... II
SPECIFICATIONS ...................................................................................................................................... II
STANDARD EQUIPMENT .......................................................................................................................... II

ELECTRICAL SAFETY PRECAUTIONS ........................................................................................................ IV
SERVICE GUIDELINES / HANDLING STATIC SENSITIVE PCB’S ................................................................ IV

CHAPTER 1 AC/DC POWER DISTRIBUTION

PROCESSOR PCB ....................................................................................................................................... 1-4
KEYPAD SCHEMATIC .................................................................................................................................. 1-4
TROUBLESHOOTING .................................................................................................................................. 1-5

CHAPTER 2 THEORY OF OPERATION

FUNCTIONAL DESCRIPTION ...................................................................................................................... 2-1
TERMINOLOGY ............................................................................................................................................ 2-2
BALANCER COMPONENTS ........................................................................................................................ 2-3

Содержание EEWB314A

Страница 1: ...Service Manual SEPTEMBER 2005 WHEEL BALANCER EEWB314A EEWB525A EEWB721A...

Страница 2: ...dential and proprietary by Snap on Tools Company All manufacturing use reproduction and sales rights are reserved by Snap on Tools Company and the information contained herein shall not be used in who...

Страница 3: ...OR TAGOUT SYSTEM PROCEDURE 1 1 ELECTRICAL REQUIREMENTS 1 1 AC DC DISTRIBUTION 1 2 DC THEORY OF OPERATION 1 2 PROCESSOR BOARD 1 2 ENCODER BOARD 1 2 DISTANCE POTENTIOMETER 1 2 TRANSDUCERS 1 2 DISPLAY BO...

Страница 4: ...AND RIGHT WEIGHTS 3 6 P43 RESETTING THE COUNTERS 3 6 P44 READ OR RESET PRODUCTIVITY OF USER 3 6 P50 READ OUTPUT VOLTAGE OF POTENTIOMETER OF SAPE 3 7 P53 DISPLAY TEST 3 7 P59 DISPLAYS THE UNBALANCE OF...

Страница 5: ...andard Dynamic and Static modes there are 5 Alloy modes each of which are illustrated by LEDs on the balancer touch panel when activated These modes are used for vehicle tire and wheels Alloy modes 1...

Страница 6: ...shaft speed 90RPM Cycle time 15 seconds with an average 14 tire wheel combination Balance Types Five 2 plane alloy modes plus static dynamic and Match Balance modes Accuracy 0 1 oz 2 8g Weight Positio...

Страница 7: ...ug from the outlet Grasp plug and pull to disconnect 5 To reduce the risk of fire do not operate equipment in the vicinity of open containers of flammable liquids gasoline 6 Keep hair loose fitting cl...

Страница 8: ...as the equipment Grasp the PCB from opposite sides using your fingertips Do not grasp the components on the board When inserting PCB s Place boards on a grounded static mat after removal Remove the n...

Страница 9: ...l operating controls to make certain the equipment will not operate CAUTION RETURN OPERATING CONTROL S TO NEUTRAL OR OFF POSITION AFTER THE TEST DE ENERGIZED STATE 6 The equipment is now locked out or...

Страница 10: ...eceives this power from the Power Supply Board at X1 pins 32 and 34 This 5 volts also passes through the Processor Board and supplies the Encoder PCB and the Distance SAPE ENCODER BOARD The encoder re...

Страница 11: ...Page 1 3 CHAPTER 1 AC DC POWER DISTRIBUTION Effective 09 2005 Power Supply Schematic...

Страница 12: ...BUTION Effective 09 2005 PROCESSOR PCB X1 From Power Supply X3 Encoder Tranducers Temp Sensor X6 Distance SAPE Pin 1 Gnd Pin 2 Output Pin 3 5 VDC X7 Not Used on Hand Spin X8 Not Used on Hand Spin X9 N...

Страница 13: ...ge 1 2 NO Replace fuse Is 5 VDC present at pins 11 and 14 at X1 NO Replace Power Board Is 5 VDC LED lit up on Processor Board NO Replace Processor Board Is 5 VDC present at pins 3 and 6 at X2 NO Repla...

Страница 14: ...NO Replace the front transducer Is both the Front and Rear transducer tight NO Adjust to specification and retest Check P 36 does the left display change from 0 to 511 and the right display change fr...

Страница 15: ...alance knowledge of signal magnitude and timing are both required Timing is determined by the encoder which consists of a electronic pcb connected to the tube of the shaft A series of timing marks are...

Страница 16: ...o Figures 2 1 and 2 2 1 Display for inner plane imbalance 2 Inner plane imbalance position indicator 3 Outer plane imbalance position indicator 4 Display for outer plane imbalance 5 Display all parame...

Страница 17: ...nd the tone generator and the LED display It receives the information from the main processor pcb via the power supply pcb This information is passed back to the processor via the power supply TEMPERA...

Страница 18: ...e slots must have a dull black background Should a dirt particle have settled on a web or in a slot it can be lifted off of the slotted sleeve with self adhesive tape by applying it onto a strip of st...

Страница 19: ...ble tolerance is 0 0015 T I R Total Indicated Runout If the surface measures out of tolerance replace the vibratory system 8 Perform a P80 and a P83 using the Pruefrotor and retest These test can be f...

Страница 20: ...nals 5 Output Once all voltages and signal levels are present a proper output can be expected TOOLS REQUIRED WHEN SERVICING THE HANDSPIN BALANCER Tools Metric Sockets 4mm Thru 15mm Metric Wrenches 6mm...

Страница 21: ...erApplication P7 Toggle switch of millimeter and inch for diameter measurement P12 Read counters P14 Calibration by user P18 Enter ALU S mode press balancing mode key to exit and back to DYN mode P19...

Страница 22: ...ng on the balancing procedure Once the calibration is done machine displays ADP FIN to indicate the calibration is successful Once the shaft stops machine displays and exits the P4 automatically The m...

Страница 23: ...s SPN UP when shaft reaches 60 rpm Displays COA ST with a beep sound when shaft speed has exceeded 120 rpm Displays CAL 1 when the speed drops to 119 rpm The machine is taking data and doing calcula t...

Страница 24: ...position in integer form from 0 to 511 in left window and angle in floating form from 0 00 to 359 in right window Meanwhile machine lights on the position bars to indicate the left weight position So...

Страница 25: ...RH display Force the shaft rearward should cause the voltage to a negative polarity forcing the shaft forward should cause a positive polarity The maximum amount of voltage for both positive and nega...

Страница 26: ...will automatically switch to default parameters 15 X 6 5 Press the P button to change from default parameters to user defined parameters The display will change to USE CST PAR for one second and then...

Страница 27: ...Displays CAL GOO d when the third step of calibration is finished and the calibration is successful or displays CAL FAL L if the calibration fails Displays SPN 4 9 Remove the 3 5 oz weight from the Pr...

Страница 28: ...er to the new Encoder P86 COPY CONTENTS OF ENCODER TO MAIN PCB ONLY AVAILABLE IN INITIALIZATION When a Main PCB is replaced and on initial power up the unit will display P85 The technician needs to pr...

Страница 29: ...ht tray The display is held in place with velcro and should remove easily Figure 3 14 There are four 4 major components on the control panel Figure 3 15 Digital Processor PCB Power PCB Display PCB Key...

Страница 30: ...tely 45 seconds After the completion of the upload the balancer will continuously emit beeps CAUTION DO NOT REMOVE POWER FROM THE UNIT DURING THE UPLOAD PROCESS PERMA NENT DAMAGE TO THE MAIN PCB WILL...

Страница 31: ...is marked with a black band Insert the clip into the transducer firmly snapping it into place Once the wire is installed it cannot be removed without destroying the transducer Apply a small amount of...

Страница 32: ...Loosen the two phillip screws holding the brake solenoid in place Slide the brake solenoid towards the brake pad until the solenoid plunger makes contact with the back of the brake pad maintaining the...

Страница 33: ...e wrap secure the SAPE spring Figure 3 26 After securing the spring with a tie wrap disconnect the SAPE string from the SAPE wheel and slowly let the SAPE wheel release tension from the spring From th...

Страница 34: ...and pull the string through until the crimped end reaches the hole Figure 3 30 The SAPE string is 20 5 from the end of the loop on one end to the crimped end Attached the looped end of the string to...

Страница 35: ...ttery regulated to 12VDC Should a battery require charging the balancer can quickly be switched from battery voltage to shop power with the flip of a switch To replace the Voltage Regulator the SAPE a...

Страница 36: ...Insert spacers Apply Loctite to the hex bolts With the aid of a helper start the two lower hex bolts Install the 4 remaining hex bolts and tighten to 22ft lbs 3 in lbs Install the rear transducer and...

Страница 37: ......

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