Hofmann geodyna 8250-2p Service Manual
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Hofmann geodyna 8250-2p Service Manual

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Summary of Contents for Hofmann geodyna 8250-2p

  • Page 1 8250-2p Service Manual Service Manual...
  • Page 2 BLANK PAGE__________________________________________________________________________ SM HOF GEODYNA 8200P -8250P Rel.H...

  • Page 3: Table Of Contents

    Sommario CHAPTER 1 INTRODUCTION GENERAL TOOLS REQUIRED IMPORTANT SAFETY INSTRUCTIONS ELECTRICAL SAFETY PRECAUTIONS CHAPTER 2 AC/DC POWER DISTRIBUTION LOCKOUT AND/OR TAGOUT SYSTEM PROCEDURE ELECTRICAL REQUIREMENTS AC THEORY OF OPERATION DC THEORY OF OPERATION FUNCTIONAL DESCRIPTION INSTALLATION PRECAUTIONS (Floor Level) CHAPTER 3 BALANCER COMPONENTS INTRODUCTION IBP2 BOX POWER ENTRY MODULE (PEM)
  • Page 4 4.24 CHECK AND REPLACEMENT OF HOOD SWITCH AND CAM 4.25 WHEEL GARD ADJUSTMENT 4.27 SONAR SENSOR AND SONAR SENSOR CABLES: CHECK AND REPLACEMENT 4.28 IBP2 INTERFACE BOARD: CHECK AND REPLACEMENT 4.29 TRANSFORMER AND RECTIFIER BRIDGE: CHECK AND REPLACEMENT 4.30 WHEEL LIFT BOARD: CHECK AND REPLACEMENT 4.31 WHEEL LIFT POTENTIOMETER: CHECK AND REPLACEMENT 4.32...
  • Page 5 SM HOF GEODYNA 8200P -8250P Rel.H...

  • Page 6: Chapter 1 Introduction

    CHAPTER 1 INTRODUCTION GENERAL This Service Manual describes maintenance, checks and repairs operations of the wheel balancer and is for use of qualifi ed personnel only. Keep this manual constantly updated, by adding Service Bulletins related to the balancers. IMPORTANT! The identifi...
  • Page 7 Calibration bar: # 0025408 / 6418020 Use this bar to calibrate the Geodata only. Service Code C80. This is required after: Ø Geodata potentiometer/s replacement Ø Geodata arm or arm components replacement. Ø Calibration of Geodata Geodata calibrator adapter # EAC0100G88A. Use this adapter to calibrate the Geodata only on balancers with Alloy Vibratory System.
  • Page 8 Chiave dinamometrica Electronic inclinometer and spirit level Assy laser positioner # EAA0362G16A. This tool allow to adjust accuractely the rear scanner. Use this tool to adjust the rear scanner with C123. It is required after: Ø Rear scanner eeplacement. SM HOF GEODYNA 8200P -8250P Rel.H...

  • Page 9: Important Safety Instructions

    IMPORTANT SAFETY INSTRUCTIONS The units are CE or UL approved, but whenever using this equipment basic safety precautions should always be followed, including the following: Read all instructions. Do not operate equipment with a damaged power cord or if the equipment has been damaged until it has been examined by a qualifi...

  • Page 10: Chapter 2 Ac/Dc Power Distribution

    CHAPTER 2 AC/DC POWER DISTRIBUTION LOCKOUT AND/OR TAGOUT SYSTEM PROCEDURE 1. Notify all aff ected employees that a lockout or tagout system is going to be utilized and why. The authorized em- ployee should know the electrical power the machine uses and it’s hazards. 2.

  • Page 11: Dc Theory Of Operation

    TRANSFORMER The transformer is supplied by a splitter connector before the X41 and transforms the 230 VAC into 36 VAC to be sent to the rectifi er bridge. DC THEORY OF OPERATION IBP2 PROCESSOR BOARD The IBP2 processor board now integrates the following sections: Ø...

  • Page 12: Functional Description

    FUNCTIONAL DESCRIPTION The wheel balancers are designed to compute static and dynamic imbalance of car, light truck, motorcycle and truck wheels. Wheels are clamped to the shaft using precision centering adapters and retainers. The shaft rotates on precision bearings on the shaft support. The rotating shaft is perfectly balanced. The wheels clamped normally represent an imbalance, which creates centrifugal force and a dynamic momentum as it is spun on the balancer shaft.

  • Page 13: Chapter 3 Balancer Components

    CHAPTER 3 BALANCER COMPONENTS INTRODUCTION The balancer is manufactured with the following macro group components, that will be described in a deeper way in the next paragraphs. Ø IBP2 BOX Ø IBP2 INTERFACE BOARD Ø EMBEEDED PC / MONITOR Ø VIBRATORY ASSEMBLY Ø...
  • Page 14 USB PORTS X8 Width potentiometer X7 Diameter potentiometer X8 Off set potentiometer Lead 1 geo data rim Lead 2 geodata magnetic X4 Optoencoder and transducers Lead 1 (+5V) micro switch wheel guard X2 IBP2 Interface board Lead 2 Microswitch for shutzing Lead 1 (+5V) for pedal switch pull X14 Scanner motor Lead 2 (+5V) for pedal switch push...

  • Page 15: Power Entry Module (Pem)

    POWER ENTRY MODULE (PEM) The Power Entry Module (PEM) consists in two separated units instead of one. Ø One unit includes the switch only. Ø One unit includes the the power supply inlet, suppresses noise and contains the fuses. If a transformer is required, it has to be connected between the PEM and the Power Interface Board, Connector X41. INTEGRATED CONTROLLER, POWER SUPPLY AND AWP MOTOR DRIVER BOARD The wheel balancer isequipped with integrated IBP2 board that includes the controller, power supply and AWP motor driver sections.

  • Page 16: Capacitors

    IBP2 BOARD POWER SUPPLY SECTION AWP MOTOR DRIVER SECTION CONTROLLER SECTION CAPACITORS The balancers is equipped by two capacitors of 10 and 20 uF . The function of both is to start up of the motor. EMBED DED PC Based on Freescale IMX535 CPU, the Snap On EPC has all the power and features indicative of larger CPU control boards, but checks in at the standard PC/104 size of 50mm x 90mm.

  • Page 17: Ibp2 Interface Board

    IBP2 INTERFACE BOARD The IBP2 inteface board interfaces to the IBP2 trough the fl at X2 connector. It provides to interface the IBP2 board with: Ø It is interfaced to the IBP2 box through the fl at cable #1 and manages. Ø...

  • Page 18: Transducers

    TRANSDUCERS Two transducers and the accompanying temperature sensor are used with all variants of the vibratory assemblies and they are installed in a manner that they form a virtual transducer on each end of the shaft. Both measuring transducers are arranged in one plane. The rear transducer pick up alternating forces of the left-hand virtual measuring plane and is supported on the machine housing.

  • Page 19: Incremental Encoders

    3.11 INCREMENTAL ENCODERS An incremental encoder picks up the rotational travel, direction of rotation, and absolute angular position of a rotating shaft. One revolution is divided in increments (periods or intervals). The output signals A and B have about the shape and relationship shown. An intended irregularity (Nullmarke) is detected, with the main shaft rotating at constant speed.

  • Page 20: Encoder Board Of The Power Clamp

    On power up self-test, the contents of the EEPROMs are compared. If diff ering but valid data is detected, C85 “Copy contents of the EEPROM on the Controller board to the Optoelectronic unit” is displayed. Do not un-plug connector X3 with power connected. A diff erence in memory contents of the non-volatile memories may occur! 3.13 ENCODER BOARD OF THE POWER CLAMP...

  • Page 21: Motor Drive System

    3.14 MOTOR DRIVE SYSTEM Ø Description: The primary functions of the motorised drive system are, to accelerate the main shaft with the wheel clamped to it up to measurement speed, keeping the speed constant during measurement and subsequently slow down to a dead stop. Acceleration and deceleration should be rapid but with controlled torque, avoiding slippage of the wheel on the adaptor.

  • Page 22: Power Clamping Device

    a command to rotate the motor. The Main Processor then sends a command to engage the Electromagnetic brake stopping the tire and wheel assembly at TDC for the inside weight location. Ø Big solenoid brake with a brake power of 30Nm / 6.74lbsft acting on the main shaft.

  • Page 23: Geodata Arm

    i.e. the clamped state is retained. To carry out a measurement run, the motor M1 is switched on but with the main shaft is free to rotate. As the tie rod cannot be pulled any further to the left, the motor torque is transferred to the main shaft via the clamping nut, thus accelerating the wheel for the measurement run.

  • Page 24: Scanner

    For each scanner, the complete process is as follows: 1. Measuring the distance to the point hit. 2. Saving the distance measured at point 1 and the position of the distance measuring device at point 1. 3. Moving the laser range fi nder to the next known position. 4.

  • Page 25: Ccd Processor Board

    3. Detecting the position of the light peak on the linear optical image sensor. 4. Calculating the distance to the object by means of polynomial interpolation. 3.21 CCD PROCESSOR BOARD Scanner is used to detect all information required by the IBP2 box about the rim to make measurement, weight placement run out, ecc.

  • Page 26: Wheel Lift Control

    3.25 WHEEL LIFT BOARD The wheel lift board communicates to the IBP2 board through the I2C bus, #8, of the Interface IBP2 and manages: Ø Input and output of 55VDC #1: It receives the 55VDC (J1+ and J2 gnd) from the rectifi...

  • Page 27: Chapter 4 Service

    CHAPTER 4 SERVICE INTRODUCTION This chapter will describe how to check and replace the components of the balancers described in Chapter 2 in the same order. NOTE: BEFORE OPENING THE MACHINE FOR SERVICE, DISCONNECT ELECTRICAL SUPPLY LINE AND USE THE LOCKOUT / TAGOUT PROCEDURE. POWER SUPPLY CABLE: CHECK AND REPLACEMENT : 30’...

  • Page 28: To Access To The Ibp2 Box

    TO ACCESS TO THE IBP2 BOX : 30’ Ø Disconnect the all cables from the back side of the IBP2 box. Ø Remove the weight tray. Ø Un-plug all of the harnesses from the IBP2 box marking each ones to ensure the correct installation. Ø...

  • Page 29: Check And Replacement Of The Power Entry Module

    Ø Check that there is continuity between terminals 1-2 and terminals 3-4 (W = 0 ~ 0.2) and discontinuity between terminals 1-3 and 1-4, as well as 2-3 and 2-4. TO REPLACE THE SWITCH: Ø Take the small fl at screwdriver and push the switch clips and at the same time push off...

  • Page 30: Check And Replacement Of The Power Entry Module 6.3A Fuses

    Ø Access to the IBP2 box Ø Disconnect the Power Entry Module from the main switch. Ø Take a small fl at or Phillips screwdriver to dismount the module. Ø Take the new module and secure it to the bracket. Ø...

  • Page 31: Check Of The 5Vdc Power Supply Voltage

    Ø Lift the fuse with the screwdriver to remove it easily from its holder. Ø Take the Voltmeter and select it in Ohm. Ø Make sure that there is continuity among the two ends. Ø If there is no continuity, replace the fuse with new one of the same Amps and voltage. Ø...

  • Page 32: Check And Replacement Of The Ibp2 Board

    4.11 CHECK AND REPLACEMENT OF THE IBP2 BOARD calibration tool, electronic or spirit inclinometer, scissors. : 1,5h : The defective IBP2 board may cause the following malfunctions: POWER SUPPLY SECTION 1. Turning the machine on, the display does not show anything. 2.

  • Page 33: Check Of Vibratory System

    Ø Check the signal fl ow from connector to connector. Some signals run straight from connector to connector. TO CHECK THE CONTROLLER SECTION: Ø Check for system messages and perform the steps. After that: Ø Check all connectors and cables for damage Ø...

  • Page 34: Replacement Of The Alloy Vibratory System

    DO NOT USE: 1. Cones that are worn or other wheel balancers. 2. Damaged sleeves or ring nuts, with loose handles, without handles, with handles secured with screws other than their own or ring nuts for other wheel balancers. 3. Pressure caps fastened to the quick release ring nuts and sleeves with adhesive tape, partially damaged, worn or for other wheel balancers.

  • Page 35: Check And Replacement Of Transducers

    Ø Using 1/4”-6mm allen key, remove the six hex bolts to the vibratory. Pay special attention of spacer placement. Ø Lift up on the vibratory member and remove. Be careful not to damage wiring, boards, etc. Ø Set vibratory member into the balancer housing. Be careful not to damage wiring, boards, etc. Ø...
  • Page 36 If the two wires are connected in the order intended, there is a minus sign as long you press. Pushing by hand, readings of 0.5xxx volts are easily obtained. Ø In order to assess the relevant insulation resistance; do not touch the machine, just read theindicated voltage. With the transducer in the humidity for several days, the insulation resistance can decline to less than 500 Meg Ohms.
  • Page 37 Ø With a screwdriver remove the collar of the transducer and disconnect the cables. Ø Cut the cables about 2mm under the old crimp. Ø Insert the wires into the transducers: the black band cables must be mounted on the positive connector (+). Ø...

  • Page 38: Check And Replacement Of Optoencoder Board Of The Main Shaft

    Remark: The tightening torque is necessary to ensure the correct preload to the spring plate. TO ADJUST THE REAR TRANSDUCER Ø Tighten the the M10x1setscrew at 0.50 ± 0,05 Nm (4,4 ± 0,4 lbs-in). Ø Fasten the locknut. To prevent the setscrew to turn, hold it with the hexagon wrench 5-mm inserted.

  • Page 39: Check And Replacement Of Encoder Board For Power Clamp

    Ø Remove the phillip screw holding the encoder PCB to the shaft tube. Ø Clean the encoder board lens Ø Clean the polygon ring. Ø Clean the polygon ring with humid or dry cotton bud. Use only water. Do not use alcohol glass cleaner, degreaser or any other aggressive liquids: This kind of substances are too aggressive for the polygonal ring.
  • Page 40 Ø Make sure that gap from the pulley is 0,5mm (0,0 / +0,1) / ( 0.02” to 0.023”) . Ø Make sure that gap from the pulley is 0,5mm (0,0 / +0,1) / ( 0.02” to 0.023”) also at the junction point of the black and white strip. Ø...

  • Page 41: Check And Replacement Of The Motor

    Ø Connect the 4 pin ribbon cable to the encoder PCB. Ø Mount the VPM plastic cover. Ø Mount the weight tray. Ø Turn on the machine. Ø Perform C code C84 and C90. Ø Check if the machine works fi ne. Ø...

  • Page 42: Check And Replacement Of The Power Clamp Nut And Tie Rod

    TO CHECK THE BELT Ø Check if the belt is worn out or damaged. TO REPLACE THE BELT Ø Remove or loosen the motor following 4.17. Ø Remove from or position the belt over the main shaft pully. Ø Proceed with the installation, mount the motor and adjust the tension of the belt. Ø...
  • Page 43 Ø Turn the fl ange counterclockwise until the complete removing. Ø Remove the 4 screws that secure the power clamp nut to the pulley. Slide the power clamp nut with the rod off through the hole of the plastici body. Ø...

  • Page 44: Check And Replacement Of The Electromagnetic Brake

    Ø Check if the screw that secure the worm screw to the shaft is fi rmly tightened. Ø Mount the power clamp to the vibratory assembly and secure it with the 4 screws. Ø Mount the fl ange and secure it with the 2 screws. Ø...
  • Page 45 Ø Remove the C-clip. Ø Remove the collar and the drive pulley. Ø Remove the stator with the brakes. Ø Mount the new stator and the drive pulley. Ø Mount the collar and the C-clip. Ø Using a 2.5mm hex key securely tighten each set screw. This will push the pulley sheave to the right while the collar tightens securely against the C-Clip and will create a gap between the collar and the pulley sheave.

  • Page 46: Check And Replacement Of Electric Brake / Clamping Pedal Switch

    4.21 CHECK AND REPLACEMENT OF ELECTRIC BRAKE / CLAMPING PEDAL SWITCH : 2.5h : Defective mechanical brake cable may cause the following malfunctions: 1. Machine does not clamp or unclamp. 2. Balancer show E89 turning it on. TO CHECK THE SWITCH Ø...

  • Page 47: Check And Replacement Of Geodata Distance Potentiometer

    Ø Remove the wires of the defective switch from the connector X13 Ø Fit the new switch on the pedal bracket and secure it with a torque wrench at 0.5Nm / 4,4 lbs-in) Ø Check the adjustment of the switch by pressing the pedal until end of stroke: when the pedal is at the end of its stroke the micro switch must be must be activated but between the actuator and its body there must be a gap of at least 1,7 mm.
  • Page 48 TO REPLACE THE POTENTIOMETER Ø Remove the Disconnect the power from the rear of the machine. Ø Remove the weight tray. Ø Remove the 10mm nut holding the plastic wheel to the frame. Ø Remove the plastic wheel carefully in order to avoid the uncoil of the return spring.

  • Page 49: Check And Replacement Of Geodata Diameter Potentiometer

    4.23 CHECK AND REPLACEMENT OF GEODATA DIAMETER POTENTIOMETER : 1h : Defective potentiometer may cause the following malfunctions: 1. Machine shows error 001041-001043-001047. 2. Machine shows error E3. 3. Balancer show E92 turning it on. TO CHECK THE POTENTIOMER Ø Check with service code C75, C80 and C92 TO REPLACE THE DIAMETER POTENTIOMETER Ø...

  • Page 50: Check And Replacement Of Hood Switch And Cam

    Ø Check if the machine works fi ne 4.24 CHECK AND REPLACEMENT OF HOOD SWITCH AND CAM : 1.5h i : Defective hood switch may cause the following malfunctions: 1. Lowering the wheel guard the wheel does not start. 2. The balancer shows E2. 3.

  • Page 51: Wheel Gard Adjustment

    4.25 WHEEL GARD ADJUSTMENT Regulate cam position, which acts on the micro-switch, so that this one will close when the covering is almost totally closed. On the screen will appear 100 when the switch is closed. Check by using C56 procedure. Ø...
  • Page 52 Ø Go in C123 and check the scanner status. Ø Enable step 1 of C123 to check the laser working. The laser beam cannot interrupt Ø Check if the laser is aligned with the cabinet. Ø Check if the scanner touches the protective glass. Ø...

  • Page 53: Sonar Sensor And Sonar Sensor Cables: Check And Replacement

    Ø Turn off the wheel balancer and disconnect the power supply. Ø Remove the weight tray. Ø Remove the rear sheet of the wheel guard pipe. Ø Check the scanner wiring. Ø Check that the wiring is not too short. Ø...
  • Page 54 TO CHECK THE SONAR ON TOUCHLESS BALANCERS Ø Mount a wheel on the wheel balancer with a steel rim, possibly 6.5 "x15". Ø IMPORTANT! Do not use only the rim and do not use wheels with an aluminium rim. Ø Perform a spin in "AUTOMATIC"...
  • Page 55 Ø Remove the bolt that secure the link to the sonar arm. Ø Slide out the sonar assembly from the arm and disconnect the fl at cable. Ø Disconnect the sonar fl at cable from the IBP2 board. Ø Take a multimeter and select it in Ohm. Ø...

  • Page 56: Ibp2 Interface Board: Check And Replacement

    4.28 IBP2 INTERFACE BOARD: CHECK AND REPLACEMENT : 2h : Defective IBP2 interface board may cause the following malfunctions: 1. The wheel lift does not work. 2. The LED lamp does not light on. 3. The balancer does not enter the Service C code. 4.

  • Page 57: Transformer And Rectifier Bridge: Check And Replacement

    4.29 TRANSFORMER AND RECTIFIER BRIDGE: CHECK AND REPLACEMENT : 1.5h : Defective transformer and rectifi er bridge may cause the following malfunctions: 1. The wheel lift does not work. 2. The general switch of the shop shuts off . 3. The fuses of the rectifi er bridge blow up. 4.
  • Page 58 TO CHECK THE RECTIFIER BRIDGE Ø Disconenct the power supply from the balancer. Ø Remove the weight tray. Ø Check the fuses. Ø Check all wiring and connectors. Ø Turn the balancer on Ø Remove the weight tray. Ø Using a VOM in VDC check for 55VDC at the intput wheel lift board terminals. Ø...

  • Page 59: Wheel Lift Board: Check And Replacement

    4.30 WHEEL LIFT BOARD: CHECK AND REPLACEMENT : 1.5h : Defective wheel lift board may cause the following malfunctions: 1. The wheel lift does not work. 2. The balancer shows E505 3. The balancer shows E24 TO CHECK THE WHEEL LIFT BOARD Ø...

  • Page 60: Wheel Lift Potentiometer: Check And Replacement

    Ø Connect all wires to the proper connector. Ø Connect the power supply to the machine. Ø Turn the machine on. Ø If the screen show H946, perform C46 to align the software. Ø Perform the lift calibration with C131. 4.31 WHEEL LIFT POTENTIOMETER: CHECK AND REPLACEMENT : 2h...
  • Page 61 Ø Remove the 4 screws that secure the lift table to the lift arms. Ø remove the lift table to access to the potentiometer. Ø Lift the lift arm and secure it with a piece of wood or steel placed under the lift arms.
  • Page 62 Ø Remove the 13mm nut holding the potentiometer to the bracket. Ø Install the new potentiometer onto bracket and tighten 13mm nut. Make sure to insert the potentiometer antitwist pin through the hole of the bracket. Ø Install cog wheel onto potentiometer shaft and hand tighten 10mm nut. Ø...

  • Page 63: Upper End Stroke Switch: Check And Replacement

    4.32 UPPER END STROKE SWITCH: CHECK AND REPLACEMENT : 1h : Defective switch may cause the following malfunctiions: 1. The wheel lift does not work. 2. The wheel lift lowers only. TO CHECK THE SWITCH Ø Turn on the machine and check the switch status with C132. Ø...

  • Page 64: Lower End Stroke And Foot Protection Safety Switch: Check And Replacement

    4.33 LOWER END STROKE AND FOOT PROTECTION SAFETY SWITCH: CHECK AND REPLACEMENT : 1,5h : Defective switch may cause the following malfunctiions: 1. Lowering the wheel guard the wheel will not start. 2. The balancer does not clamp/unclamp. 3. The wheel lift does not lower. TO CHECK THE SWITCH Ø...
  • Page 65 Ø Turn on the machine and check the switches status with C132. Ø Turn off the machine. Ø Open the handles of the lift carriage. Ø Dismount the two shells of the handle: pay attention to the spring inside! Ø Remove the lift table following 4.31 Ø...

  • Page 66: Wheel Lift Motor: Check And Replacement

    4.35 WHEEL LIFT MOTOR: CHECK AND REPLACEMENT : 2h : Defective switch may cause the following malfunctiions: 1. The wheel lift does not work. TO CHECK THE MOTOR Ø Turn on the machine. Ø Go to C132 and check the power supply and motor current. Ø...

  • Page 67: Unlocking Of The Wheel Lift Worm Screw

    Ø Install the new motor. Ø Mount the lift arms guide to the motor shaft. Ø Connect the motor to the wheel lift board. Ø Mount the lift table. Ø Connect the machine to the power supply. Ø Turn the machine on. Ø...

  • Page 68: Touch Screen: Check And Replacement

    4.37 TOUCH SCREEN: CHECK AND REPLACEMENT : 30’ i : Defective monitor may cause the following malfunctions: 1. Turning the machine on the machine shows E89. 2. Turning the machine on the monitor does not show anything. 3. Monitor does not change working function. TO CHECK THE MONITOR Ø...
  • Page 69 TO REPLACE THE EPC Ø Disconnect the fl at cable from IBP2 board. Ø Remove the VGA nuts Ø Remove the micro SD card, see par.5.2. Ø Remove the 4 screws the hold the EPC. Ø Fit the new EPC to the box. Ø...

  • Page 70: Rear Scanner: Check And Replacement

    4.39 REAR SCANNER: CHECK AND REPLACEMENT : 1.5h : Defective rear scanner may cause the following malfunctions: 1. Turning the balancer on the screen E506. 2. Turning the balancer on the screen shows H945 3. The wheel runout measured is not correct. TO CHECK THE REAR SCANNER Ø...

  • Page 71: Chapter 5 Trouble Shooting

    CHAPTER 5 TROUBLE SHOOTING INTRODUCTION This chapter represents a kind of trouble-shooting guide, which describes the diff erent typologies of error, all system messages available and the possible causes of malfunction. In particular the following are described: Ø Error Codes: an error code appears automatically on the screen when an error occurs; these codes are subdivided into H-code, E-codes and K-codes.

  • Page 72: In The Field Reprogramming Of Balancer

    IN THE FIELD REPROGRAMMING OF BALANCER After software down loading, perform service codes in the following order:C47- Select machine model: after the selection, the machine will make three audible beeps followed by the automatic turning off and on again. • - Reset Counters •...

  • Page 73: Selftest During Startup

    ATTENTION! This is a calibration function; interrupt this function after the test in STEP 1 with the OK key. • - Test of off -set and diameter potentiometers. SCANNER - SONAR SENSOR - AWP MOTOR DRIVER SECTION • C123 - Scanner and sonar status fl ags POWER SUPPLIES STAUS •...
  • Page 74 Rim dimensions entered incorrectly Balancer shows E1 at the end of the balancing cycle. Complaint Balancer shows E1 at the end of rim data entry. Inner SAPE gauge arm not in home position. Root cause Wheel lift board too close to the wheel. Service code C92, C80, C81, C122, C123, C90 Re-position SAPE gauge arm in home position and press STOP or ESC key to continue.
  • Page 75 Unbalance Too Big Complaint The balancer shows E5 Root cause Residual adapter unbalance too high Service Code C4, C84, C90 Perform C4 Actions to do Perform C84 Calibration weight not attached to fl ange Complaint During the calibration C115 or C83, at the end of one of the step 3 or 4 is displayed E6 Calibration weight not attached to the fl...
  • Page 76 User Calibration Terms Out Of Range Complaint At the end of the C115/C83 calaibration the balancer shows E15 Root cause Corrective terms for readjustment are out of range Service Code C115, C83, C90 Actions to do Repeat the C115 or C83 Calibration weight attached erroneously to fl...
  • Page 77 Run out measurement failed Complaint At the end of the measurement run, the balancer shows E30 Balancer is not able to measure run out during the wheel scanning. Black shining rims Root cause Excessive exposure to sun light Some object is obstructing the rear camera Service Code C123, C122 Check signal quality from camera.
  • Page 78 The inner gauge arm for distance and rim diameter is defective Complaint After switching on the balancer, the screen shows E92 2D sape or geodata arm not in home position. 2D sape or geodata arm not calibrated. Distance and/or diameter potentiomer are unplugged. Root cause Distance and/or diameter potentiometer are reversed on the IBP box.
  • Page 79 E145 Contents of the EEPROMs are diff erent Complaint After switching on the balancer, the screen shows E145 Contents of both permanent memories are diff erent, but both contain valid data. Root cause EEprom of IBP box and Optoencoder are not matching each other. IBP box or Optoencoder have been replaced Service Code C74, C85, C86...
  • Page 80 E360 Check scanner calibration Complaint Turning the balancer on the screen shows E360 The scanner requires wheel profi ler position calibration: the SW detected that calibration data Root cause are missing. Service Code C123, C122, C90 Calibrate with C122. Check the scanner fl at cable. Actions to do Check the scanner.
  • Page 81 E373 Check inner scanner calibration Turning the balancer on the screen shows E373. Balancing is not possible since wheel data Complaint cannot be scanned. Root cause The inner scanner has not been factory calibrated Service Code C123, C122, C90 Actions to do Replace the scanner E374 Check inner motor power supply...
  • Page 82 E378 Check inner laser modulation Turning the balancer on the screen shows E378. Balancing is not possible since wheel data Complaint cannot be scanned. Root cause Scanner laser self test failed Service Code C123, C122, C90 Check the fl at cable connecting the IBP2 board and the inner scanner CCD. Actions to do Check the inner scanner cable connecting to the laser.
  • Page 83 E902 Touch screen not calibrated Complaint Turning the balancer on the display shows E902. Touch screen was not calibrated. Root cause Touch screen not compatible. Defective touch screen. Service Code C130 Perform the touch screen calibration. Actions to do Replace the touch screen. SM HOF GEODYNA 8200P -8250P Rel.H...

  • Page 84: H" Error Codes

    "H" ERROR CODES Optimisation Can't Improve Press ESC button and balance the wheel again without perform the optimization because the whe- el running conditions cannot be improved. Optimisation Not Recommended Further optimization not recommended but feasible Optimisation Recommend Minimisation Weight minimisation is recommended, optimisation can achieve no further improvement Power Clamp Disabled Enable power clamp Sape Can't Relocate...
  • Page 85 Invalid Sonar Value Raise the wheel guard and lower it slower Sonar has change acceleration during the lowering Raise the wheel guard and let low it itself Check the sonar cables. If the problem still persists: Check if sonar is well secured to the wheelguard. If the problem still persists: Check the gas spring.
  • Page 86 H950 Software update via USB fl ash drive has failed Perform C50. Change the USB stick. SM HOF GEODYNA 8200P -8250P Rel.H...

  • Page 87: 5.8 "K" Error Codes On Kernel

    5.8 "K" ERROR CODES ON KERNEL 0X001001 PO NOT FOUND Turn off and back on the machine. If the problem still persists: Load the software. If the problem still persists: Check the main shaft Optoencoder cable If the problem still persists: Check the main shaft Optoencoder.
  • Page 88 0X001005 PO EEP2 RD Turn off and back on the machine. If the problem still persists: Load the software. If the problem still persists: Replace the Optoencoder. If the problem still persists: Replace the LCD touch box. If the problem still persists: Call Snap On C Codes C74, C75, C85, C86, C122, C115, C84, C88, C90...
  • Page 89 0X001012 KEYBOARD READING The microprocessor has to fi nd the keyboard and communicate with it while balancer is working. If something is wrong with that this diagnostic codes is generated by balancing kernel software. I2C communication failure. Check the plugs, connectors and cable wiring from power interface board to the key board. May have to replace the integrated panel assembly if you can not fi...
  • Page 90 0X001023 SPEED FLUCTUATION DURING THE MEASUREMENT Check the belt tension. If the problem still persists: Check the speed with C60. If the problem still persists: Check Optoencoder with C54. If the problem still persists: Check the capacitor If the problem still persists: Call Snap On C Codes C28, C54, C60...
  • Page 91 0X001032 VCC ABOVE LIMIT OF 5.2VDC Check the power supply with C110. If the problem still persists: Check the IBP box C Codes C110, C86, C122, C115, C84, C88, C90 0X001033 VCC BELOW LIMIT OF 5.2VDC Check VCC connectors and cables Check the power supply with C110.
  • Page 92 0X001037 LINE BELOW LIMIT Check the main power supply with C55. If the problem still persists: Check the Power supply to wall plug If the problem still persists: Check the main power supply cord and plug. If the problem still persists: Check the main switch.
  • Page 93 0X001042 SAPE 2D LOW VOLT Check the Diameter potentiometer connector and cable. If the problem still persists: Check the Diameter potentiometer If the problem still persists: Check the IBP box. If the problem still persists: Call Snap On C Codes C80, C81, C92, C115, C84, C88, C90 0X001043 SAPE 2D HIGH VOLT...
  • Page 94 0X001052 NO CAL USER Perform the User calibration If the problem still persists: Call Snap On C Codes 0X001053 FAIL CAL USER Perform the User calibration If the problem still persists: Call Snap On C Codes 0X001054 VIRTUAL DIMENSION OUT OF RANGE Perform the calibration If the problem still persists: Check the transducers wiring.
  • Page 95 0X001057 CAL1 0G WEIGHT HIGH Perform the calibration with C115. If the problem still persists: Check the transducers wiring If the problem still persists: Check the transducers adjustment. If the problem still persists: Check the IBP box. If the problem still persists: Call Snap On C Codes C66, C75, C103, C104, C115, C84, C88, C122, C90.
  • Page 96 0X001061 CAL WEIGHT NOT AT 12 O’CLOCK IN STEP 2 OF C115 Perform the calibration C115 with weight in the correct side. If the problem still persists: Call Snap On C Codes C115, C84, C88, C122, C90 0X001080 SPINUP TIMEOUT Check the belt adjustment.
  • Page 97 0X001082 SPEED LOW Check wing nut If the problem still persists: Check the shaft. If the problem still persists: Check the wheel clamping. If the problem still persists: Check the belt adjustment. If the problem still persists: Check the belt. If the problem still persists: Check the brake adjustment.
  • Page 98 0X001085 SLIP DETECTED Check wing nut If the problem still persists: Check the shaft. If the problem still persists: Check the wheel clamping. If the problem still persists: Check the main shaft Optoencoder. If the problem still persists: Check the IBP box If the problem still persists: Call Snap On C Codes...
  • Page 99 0X001092 CLAMP MAX DISP Check the Power Clamp pedal. If the problem still persists: Check the drive Pulley Optoencoder If the problem still persists: Check the brake pads If the problem still persists: Check the electromagnetic brake If the problem still persists: Check the main shaft Optoencoder.
  • Page 100 0X001095 CLAMP SLIP Check the Power Clamp pedal. If the problem still persists: Check the drive Pulley Optoencoder If the problem still persists: Check the brake pads If the problem still persists: Check the electromagnetic brake If the problem still persists: Check the main shaft Optoencoder.

  • Page 101: Structure Of An Error Code

    STRUCTURE OF AN ERROR CODE A complete error code consists of 6 hexadecimal digits. Digit 6 Digit 5 Digit 4 Digit 3 Digit 2 Digit 1 Module ID Priority ID Error code Left Display Right Display The module ID is a 2-digit hexadecimal value and indicates the software module which detected the error. The priority ID represents the kind of error (message only, critical error).
  • Page 102 81X160 81X165 81X16A 81X161 81X166 81X16B K CODE 81X162 81X167 81X16C 81X163 81X168 81X16D 81X164 81X169 DESCRIPTION Communication with EEPROM through I2C bus is failed. When the microprocessor wants to calculate the unbalances, it needs a lot of data that EXPLANATION stored in EEPROM.
  • Page 103 5. Auto Stop System (Voltage for relay) 6. Power clamp encoder board K CODE C10 F02 C10 F07 C10 F08 DESCRIPTION Unsuccessful self-test on power up EXPLANATION A software command was invalid or the hardware is set up wrong for the model ACTION Restart the balancer .
  • Page 104 C10 410 C10 420 C10 430 K CODE C10 410: No signal output from transducer 1 (behind main shaft) DESCRIPTION C10 420: No signal output from transducer 2 (front of main shaft) C10 430: No signal output from both transducers There are two preloaded transducers connected to the IBP board.

  • Page 105: Chapter 6 Service Codes

    CHAPTER 6 SERVICE CODES INTRODUCTION The service codes are used to: Ø Calibrate module Ø Change setting. Ø Show and check measured values of screen of certain signals, system information. Ø Upgrade software ENTERING SERVICE C CODES AND OPTIONS 1. From the main screen select the voice "SETTINGS”. Press and hold “STOP”...

  • Page 106: 6.4Service C Codes Reference

    6.4SERVICE C CODES REFERENCE C28 Display & clear error record Options: Do not clear the error memory Clear the error memory. Description: The last 10 diff erent malfunction codes are written into the error memory so that they can be called up and reported by the operator of the wheel balancer e.g.
  • Page 107 Comments: The selected mode of operation disappear when machine is turned off . To transfer the selection to the permanent memory perform a C90 code. C46 Download of lift software from fl ash memory to lift board Options: No action Start software download to lift board Description:The download operation is started by pressing the Acknowledgment key when the value is “1”.
  • Page 108 • Plug the USB stick to the USB port in the back of the balancer. • Turn on the balancer and go to Service Code C50. • Enter Value 1 and press OK button to start the downloading. IMPORTANT! DO NOT TURN OFF THE BALANCER BEFORE THE END OF THE OPERATION BECAUSE THE SOFTWARE UPDATE PROCESS WILL BE INTERRUPTED AND,TURNING IT ON, THE SCREEN WILL ONLY SHOW “PLEASE WAIT”...
  • Page 109 • Turn on the balancer. • Perform the C50 again: a. If the update will be completed successfully means that USB cable is defective and must be replaced, see the spare parts list. b. If the update will fail again means that USB stick is defective, see the spare parts list. Comments: None Checking the incremental encoder on the main shaft Options: None...
  • Page 110 From IBP2 / Kernel Ver. 2.0: the value 0 appears on channel B at steps 2, 4, and 5 of the program. More detailed information about step 8 : Cases of indication with digital display in step 8: LH display RH display Increment count channel A Increment count channel B...
  • Page 111 C57 Indication of the temperature Options: None Description: Indication of temperature in centigrade (°C) Comments: Please refer to error ID for the limits. C59 Indication of the residual unbalance of main shaft compensated for using C84 Options: None Description: Indication of the residual unbalance of the main shaft and drive pulley compensated for using C84 Channel 1 corresponds to front transducer: maximum unbalance allowed ≥1.5.
  • Page 112 1. Number of measurements carried out during the test with code C63. 2. The mean of unbalance plus angular location in degrees. 3. The mean of vectorial deviation of the measured mean of unbalance after the number of measurements exceeded 4.
  • Page 113 Values for both transducers in mm. Reference mark is the zero reference of Geodata (right-hand edge of machine cabinet for geodata) 1. Field : Rear transducer: 262 - 272 2. Field : Front transducer: -1500 to -10000 Comments: The shown values are those calculated in the latest calibration performed, not those saved from latest C90.
  • Page 114 The step numbers are indicated on the left display: angle = arg(2 measuring run – 1 measuring run) - arg(3 measuring run – 1 measuring run) Display on screen balancers: 1. Field : Rear transducer 2. Field : Front transducer Comments: If C90 is performed, the shown values are saved in two new persistent objects: C74 Display of angular position of main shaft, incremental encoder test Options: None.
  • Page 115 C75 Display values from AD converter Options: Choosing the AD channel Description: AD input Channel Description AdC 0 Free AdC 1 fLED-CW LED current control AdC 2 Free AdC 3 fBAL-TMP Temperature of transducer (analog version if present) AdC 4 Free AdC 5 Free...
  • Page 116 Move gauge arm to calibration position 1 and adjust diameter potentiometers mechanically: the voltage of the diameter potentiometer is indicated in the left 3-digit display. The voltage of the distance potentiometer is indicated in the right 3-digit. Halfcone tip under gauge head placed on calibration notch of the thermo format adapter.
  • Page 117 STEP 3: Move gauge head to calibration position 3 (notch in plastic adapter). Halfcone tip under gauge head placed on calibration notch of the thermo format adapter Press acknowledge key to confi rm step 3. STEP 4: Move gauge head to calibration position 4 (with calibration bar). Use the calibration bar.
  • Page 118 C83 Calibration of the unbalance measurement with wheel/test rotor. Options: None Special function: In case of using of a wheel, use a 6.5”x15” steel rim with a maximum unbalance of 10g in each side. Description: With the calibration of the unbalance measurement the following are determined: the sensitivity of the transducers, the phase diff...
  • Page 119 Step 3: Press the “START” button to begin the measuring run. Step 4: Remove the 100 gram calibration weight and insert it into the right hand plane of the Pruefrotor / wheel. Press the “START” key to begin the measuring run. Step 5:.
  • Page 120 Step 6: The ambient transducer temperature is displayed for 1 second. Step 7: Remove the 100 gram weight, lower the hood and press the “START” button to begin a measuring run. Step 8: Insert the calibration weight that is supplied with the balancer on the left side of the backing plate.
  • Page 121 Since the angular position of the drive pulley relative to the main shaft is random in the clamped state, the residual unbalances of main shaft and drive pulley have to be determined and stored separately. To separate the residual unbalances, two measuring runs have to be performed. Between these measurement runs, the drive pulley has to be adjusted by approx.
  • Page 122 C88 Calibration of 12 o’clock position for fi tting position of weights Options: None Description: With this calibration code it is possible to compensate for the individual angular deviation of a machine. During the basic calibration in the factory this code will only be carried out if there is a clearly noticeable angular deviation, and not as a general procedure.
  • Page 123 Step 3 Move the shaft to locate the 100 gram weight at “BOTTOM DEAD CENTER” position. Use a spirit level or electronic inclinometer to fi nd the correct position. Press the “ENTER” key to save the data. Comments: Save the calibration data in the the permanent memory using code C90. Saving the adjustments data in the PO’s Options: No storage...
  • Page 124 • clean the incremental encoder tape C102 Performing a measuring run and indication of harmonic contents of the unbalance signals Options: None Description: Start measuring run by setting C102 and pressing the START key. Once the measuring run is completed, the following values are read out one below the other: Non-linear harmonic distortion coeffi...
  • Page 125 Mount the calibration tool on the balancer shaft . Set the calibration tool data. Step 1: Press the “START” button to begin the measuring run. Step 2: If a Pruefrotor is used, screw the 100 gram weight on the left side of the Pruefrotor. If the value displayed is not “100”...
  • Page 126 Step 4: Remove the 100 gram calibration weight and insert it into the right hand plane of the Pruefrotor. Press the “START” key to begin the measuring run. Step 5:. Step Number 5 has not been programmed. Press the “ENTER” key to advance to the Step 6: The ambient transducer temperature is displayed for 1 second.
  • Page 127 Step 7: Remove the 100 gram weight, lower the hood and press the “START” button to begin a measuring run. Step 8:. Insert the calibration weight that is supplied with the balancer on the left side of the backing plate. Press the “START”...
  • Page 128 Step 1: Position the rotor in vertical position with the segmented top down left . For this operation is extremely recommended the using of a spirit level. Press “ENTER”. Step 2: Rotate slowly the rotor of + 20°. When the indication “LOCK” is displayed on the second line, hold the rotor in position for a few seconds so that the SW will block automatically the shaft.
  • Page 129 Unclamp the calibration rotor from the shaft and clamp it rotated of 180° with the couterweight in front of the sonar. IMPORTANT! Handle the tool from the fl at side. Do not hold it from the spacer. Rotate the rotor of 180° to place the counterweight surface in front of the sonar. Make sure that the value read by the sensor is 50 mm (+/- 1mm) less than the previous one.
  • Page 130 Digital Sonar connected to the wheel guard. Digital Sonar without the potentiometer does not require any voltage of reference. It only requires a correct wheel guard inclination. In Ch4 are only displayed numbers the represent the inclination in degrees and in Ch5 it is only displayed “DIG” to represent that the machine is using a Digital Sonar.
  • Page 131 Ø Make sure that the laser light of light is perfectly superimposed to the line marked on the positioner. Press ENTER to escape the adjustment. Appendix : AWP Flags for C122 / C123 In service procedure C122/C123 diagnostic information should be displayed as following: MainPw MainAdc MainEEP...
  • Page 132 Notes: 1. Available only on new camera boards (EAP0204G50B), default to 1 on former boards. 2. Obviously fails on BFH800 (this have not rear scanner and rear shift scanner) 3. Valid after runout measurement only. 4. NOT Valid for b9855P / b9850P and 6900p. Every failure about a diagnostics bit produces an error code.
  • Page 133 C130 Enable / Disable Touch Screen Options: None Description: On selection the current status is displayed (0 / 1). Select 0: Standard Screen Select 1: Touch screen First Step Second Step Third Step Comments: At the end of the calibration process the machine will reboot itself. SM HOF GEODYNA 8200P -8250P Rel.H...
  • Page 134 C131 Lift calibration Options: None Description: Step 1 Lift in low position. Value must 1.51. Press “ENTER” to store the position Step 2 Lift in upper position. Value must be 2.51. Press “ENTER” to store the position Comments: Save calibration data with C90 C132 Lift Diagnostic Options: None Description: Use this C code to diagnose the wheel lift...
  • Page 135 ANALOG HANDLE UP / DOWN: Percentage of applied force with respect to the maximum value of the resistance present in the handle. In rest position must be 0. If it 10 or 20, the sensor is defective or for some reason there is a pressure on it. From mechnaical point of view, the upper switch is mounted in the bottom side while down one is mounted to the upper side.
  • Page 136 SM HOF GEODYNA 8200P -8250P Rel.H...
  • Page 137 UPDATING GUIDE: REVISION A September 2020 Author: Stefano Muzzioli Copyright statement This manual and the materials contained within are copyright protected. The manual, or any section, page, drawing, or diagram, may not be reproduced by any means without the written consent. The information and specifi cations in this manual are based on the latest information available at the time of publication.
  • Page 138 SM HOF GEODYNA 8200P -8250P Rel.H...
  • Page 139 Notice: The information contained in this document is subject to change without notice. Hofmann makes no warranty with regard to present documentation. Hofmann shall not be liable for errors contained here- in or for incidental consequential damages in connection with furnishings, performance, or use of this material.

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