Service Manual 39 Series
Contents
1. mama T0 END THE TEST PRESS THE STOP BUTTON eee C54 Use this code to check the Opto electronic The complete test consists of four sections and is done with the motor turning the shaft Also see test code C74 m Enter C 5 4 C Press start This is the A channel test 1 will show in the left display The right display will show a number which may fluctuate two numbers This number should be within the range of 40 60 m Press the e button 2 will show in the left display This is the B channel test The right display will show a number which may fluctuate two numbers This number should be within the range of 40 60 m Press the e button 3 will show in the left display This is the zero reference test The right display will show a number which may fluctuate two numbers This number should be within the range of 40 60 E Press the e button 4 will show in the left display The right display will show a number which may fluctuate two numbers This number should be within the range of 20 35 You may monitor each test repeatedly by pressing the e key If any of these tests display readings which are not within the specified range the Opto electronic may need replacing It is only recommended to replace the Opto electronic if an out of tolerance reading is found along with a machine malfunction It is not recommended to replace the Opto electronic if the above tests indicated a reading slightly out of tolerance2. ADJUSTMENT PROCEDURES Cont Rim Distance Gauge Adjustment d 2 Enter C 80 C A number will appear in the right display Hold a straight edge against the wheel contact surface of the wheel adapter backing plate Measure the distance in mm from the wheel contact side of the straight edge to the flat surface of the distance gauge in the rest position Record the measurement Subtract 25 The remainder will be used in step 5 Enter the remainder found in step 4 It will replace the number shown in step 2 Press the C button Example The scale reading was 185 185 25 is 160 C80 Enter 160 press the C button Continue on with Readout Adjustment Revised 3 00 Page 31 Service Manual 39 Series ADJUSTMENT PROCEDURES Cont Readout Adjustment Basic Re calibration Passenger Car 8 Light Truck Wheels Geodyna 39 A Mount a wheel and set corresponding rim width distance and diameter B Balance the wheel to within 1 00 ounce in each plane C Select a test weight of 3 5 ounces 99 grams or any size between 3 and 4 ounces 1 ounce 28 35 grams D Enter C 83 C 1 Press start the machine will run through a cycle 2 Enterthe size of the selected test weight in grams then press C 3 Attach the test weight on the left side of the wheel Press start 4 Remove the test weight from the left and attach it on the right Press start 5 Removethe wheel and wing nut pressure cup cone and spacer ri
3. Memory defective Replace the Processor or Interface circuit board Ifa replacement board is not at hand adjust the machine following adjustment procedures then leave the power on until the defective part can be replaced Adjustment amp or function code data memory on Interface circuit board is incorrect When the power is switched on the computer program transfers stored data from the Interface circuit board data memory to the Processor circuit board memory If an error is detected code E63 displays It is possible this error can occur because of loss of stored data caused by large voltage variations in the balancer power source This could occur during lightning storms or by power distribution problems Readjust and set function codes If E63 reoccurs replace the Interface circuit board Revised 3 00 Page 13 Service Manual 39 Series E64 E65 E73 E74 ERROR CODE DIRECTORY Cont 24 vdc is not available on the Interface circuit board Check the 0 8 amp fuse on the Interface circuit board If the fuse continues to blow there can be short at one of the contactor coils Disconnect one at a time to trouble shoot The problem may also be the Interface or Processor circuit board Power supply voltage to the Processor circuit board dropped too low during the balancing cycle to ensure accurate readings Measure the line voltage connections to the balancer and the internal connections See code C55 Transmitter IR LED of Opto e
4. EO E1 E1 E1 E2 E5 E6 E7 Keyboard entry of a non existent error code with gt display Rim distance setting is impractical for balancing using the selected ALU 2 or 3 mode The distance between the rim center flange and left correction plane is too narrow with lt gt display Rim width entered is out of range with display Rim diameter entered is out of range Check jumper at terminals 1 8 2 on the interface board Wheel is too far out of balance for zero balance compensation during function code C4 or calibration weight was inserted by mistake during CAL 1 Calibration weight was not inserted during Cal 2 step of the user calibration or both pick ups are disconnected ALU mode was selected after rim dimensions have been entered in mm Dimensions must be entered in inches width amp diameter to use the ALU modes Revised 3 00 Page 10 Service Manual 39 Series E8 E9 E15 E30 E31 ERROR CODE DIRECTORY Cont During tire matching the valve position was not entered Tire matching error e An error was made following the procedure or e The wheel was incorrectly centered on the adapter or e The tire was incorrectly mounted on the rim During operator calibration C14C The correction factors used for calibration are incorrect Causes The Geodyna 39 Series uses a wheel adapter that is different than many earlier model Hofmann balancers The machines use a longer
5. 6 Thread the motorcycle calibration weight into the motorcycle adapter from the right side Press Start CAUTION IF ERROR CODE E34 E35 OR E36 APPEARED DURING THE C83 ADJUSTMENT IT IS NECESSARY TO FIND AND CORRECT THE CAUSE OF THE ERROR BEFORE STORING INTO MEMORY Following the above procedure cancels the value stored in the memory to compensate for shaft imbalance It is always necessary to balance the shaft Continue on to step E Balance the Shaft Revised 3 00 Page 33 Service Manual 39 Series ADJUSTMENT PROCEDURES Cont Readout Adjustment Basic Re calibration Truck Wheels Geodyna 39 LM A Mount a wheel and set corresponding rim width distance and diameter B Balance the wheel to within 2 00 ounce in each plane C Select a test weight of 8 ounces 227 grams or any size between 6 and 10 ounces 1 ounce 28 35 grams D Enter C 83 C 1 Press start the machine will run through a cycle 2 Enterthe size ofthe selected test weight in grams then press C 3 Attach the test weight on the left side of the wheel Press start 4 Remove the test weight from the left and attach it on the right Press start 5 Remove the wheel and wing nut pressure cup cone and spacer ring Leave only the threaded sleeve and backing plate on the balancer shaft Press start 221 Ka 6 Thread the calibration weight into the wheel adapter backing plate Press start CAUTI
6. erinemist TO END THE TEST PRESS THE STOP BUTTON Revised 3 00 Page 21 Service Manual 39 Series C55 C59 C60 USING THE DIAGNOSTIC CODES Cont Use this code to check for proper D C voltage at the Circuit Board A function of the Processor circuit board is to provide a DC power supply Depending on operating voltage either 115 or 230 volts AC is supplied to the transformer primary The transformer reduces the voltage at the secondary to approx 18 27 volts AC The secondary voltage is converted by the power supply portion of the processor circuit board to DC voltage filtered and regulated The DC voltage is used to operate the electronic circuits and motor control relays Enter C 55 C The right display indicates the DC voltage The allowable working voltage is 16 to 37 VDC for Eprom version 1 21 amp 23 37 for Eprom versions 0 02 1 20 If error E54 was displayed when the machine was turned on less than the allowable voltage will be measured If error E55 was displayed when the machine was turned on more than 37 VDC willbe measured SWITCH THE POWER OFF Disconnect the Processor circuit board 34 pin connector for further troubleshooting To trouble shoot check the voltage at the wall receptacle the input voltage to the balancer at the transformer primary and the output voltage from the secondary erimit TO END THE TEST PRESS THE STOP BUTTON reres Use this code to display the shaft imbalance c
7. zk With this function you can select 5 through 10 revolutions for a measuring run Factory set to 10 revolutions If the PRO MATCH program is in use the measuring revolutions are automatically set to 10 NOT RECOMMENDED TO USE THIS CODE Press the e button to change Revised 3 00 Page 4 Service Manual 39 Series SETTING FUNCTION CODES Cont C20 Adjusts location imbalance The default value is 50 for the 39 39 M 8 140 for the 39 LM Mount and balance a wheel to within 1 ounce Then Enter C 4 C A 0 will show in the right display C4 in the left Press the START button The balancer will run through cycle stop and display a 1 in the right display Press the STOP button Attach a weight to the outside of the wheel Press the START button After the wheel stops rotate it until only the center bar is on in the right hand display weight should be at 6 00 If the weight is not at 6 00 then it will need to be adjusted To Adjust The Geo 39 39 M loosen the screws that hold the weight tray and then lift the front of the tray up slightly The Geo 39 LM remove display panel Unplug the Opto electronic cable from the Interface board Enter C 20 C Reconnect the Opto electronic cable A number will appear in the right hand display If the weight is before 6 00 enter a number higher than the displayed default number press the C button If the weight is after 6 00 then enter a number lower than the displayed default number press the
8. ADAPTER COMPONENTS CENTER CONE ADAPTER REMOUNT TEST Important note Please read first The test will check the wheel as well as the wheel adapter Most wheels are manufactured to less exact tolerances than the wheel adapter The majority of the measured remount error is usually caused by the wheel not the wheel adapter It is best to use a wheel that is known to be true The wheel must have a round smooth center hole and the surface that presses against the wheel adapter backing plate must be flat and smooth Because remount error is a function of mechanical tolerances the heavier the wheel assembly the larger the mounting error Use a mid size 14 or 15 wheel and tire about 30 to 40 pounds Usually OEM alloy wheels will remount best Le First make sure the results of the SHAFT IMBALANCE WHEEL ADAPTER TO SHAFT REMOUNT TEST are acceptable Electronic imbalance compensation must be off Check by entering code C4 0 must be displayed If 1 appears switch the balancer off and then back on after a few seconds Balance a 30 to 40 Ib wheel exactly to 0 00 in each plane with the small imbalance suppression C2 turned off Operate the balancer a few times and insure that no more than 0 05 oz is displayed Loosen the wing nut hold the centering cone in place and rotate wheel 180 degree Tighten the wing nut Operate the balancer through a cycle The new display is the remount error A reading not larger than 0 50 ounce is genera
9. C button Press the START button and check to see if the location is correct if not perform adjustment again After location is adjusted properly then store it in the permanent memory with code C10C C21 Selects the amount of braking time Mainly used for the 39LM It is selectable from 0 to 9 Press the e button to change C24 Selects rim distance must be entered in millimeters mm or centimeters cm through the key panel The machine is factory set for cm To check for the correct setting Enter code C 24 C 1 display entry must be made in cm This is the correct setting 0 display entry must be made in mm This is the incorrect setting If O displays press the e key to change to 1 Press the stop button GR 0 To enter rim distance To enter rim distance in centimeters in millimeters Correct Setting Incorrect Setting Revised 3 00 Page 5 Service Manual 39 Series SETTING FUNCTION CODES Cont C43 Resets the cycle counter Built into the software of the balancer is a counter that records each time the balancer is operated When code C12C is entered the total of measuring runs is displayed To resetthe counter to zero Unplug the balancer from line voltage The Geo 39 39 M Loosen the screws that hold the weight tray and then lift the front of the tray up slightly The Geo 39 LM remove display panel Unplug the Opto electronic cable from the Interface board Enter C 43 C Unplug the balancer from line
10. E8 11 C9C 04 28 0 02 E9 11 C10C 03 04 36 0 02 E15 11 C12C 04 0 02 E30 11 C13C 04 0 02 E31 11 41 C14C 08 36 0 02 E34 12 C15C 04 09 1 21 E35 12 C17C 04 28 0 02 E36 12 C20C 05 08 28 35 0 02 E50 13 C21C 05 09 1 21 E51 13 C24C 05 29 0 02 E52 13 C43C 06 0 02 E53 13 C46C 28 0 02 Deleted after 1 10 E54 13 C47C 07 28 30 0 02 E55 13 C53C 09 21 0 02 E56 13 C54C 09 21 0 02 E58 13 C55C 09 21 0 02 E60 13 C59C 09 22 0 02 E61 13 C60C 09 22 0 02 E62 13 C61C 09 23 0 02 E63 13 C62C 09 0 02 E64 14 C63C 09 24 0 02 E65 14 C64C 09 0 02 E73 14 C65C 09 24 0 02 E74 14 41 C66C 09 0 02 E76 15 C68C 09 24 0 02 E77 15 C69C 09 24 0 02 E78 15 C74C 09 25 0 02 E79 15 C75C 09 26 0 02 E80 15 C80C 08 31 0 02 E136 15 C83C 08 32 34 0 02 C84C 08 35 0 02 indicates the code can only be accessed by unplugging the Opto electronic cable from the Interface board Revised 3 00 Page 2 Service Manual 39 Series SETTING FUNCTION CODES This list is for Eprom version 1 20 8 later versions For earlier versions see Program Updates Function codes are verified selected and changed as follows Enter a code by pressing C the code number then C again The right display will show one of the numbers that follows the codes below After verifying or changing the code press the RED stop button Unless stored in the computer memory located on the Interface circuit board a function code that has been changed returns to the original state when the power is tur
11. NOTE A properly functioning diode will show low resistance in one direction only 6 Motor To test the motor disconnect the motor leads from the electric Set the meter to ohms and measure as indicated below For this test polarity does not matter Blue to white wire 4 8 ohms Red to white wire 4 8 ohms Any color to green open circuit NOTE All of these values should fluctuate if motor shaft is turned while measuring with meter Revised 3 00 Page 40 Service Manual 39 Series Symptom Diagnostic Test Check Probable Fault Machine does not have a display E74 Wheel will not spin E31 Wheel will spin backwards No brake Machine hums when turned on Machine is running louder than normal Revised 3 00 Electric Board Trouble Shooting Table Is there voltage at the output of the transformer Press start then spin wheel by hand Does wheel continue to spin Press start Does wheel continue to Spin backwards after E31 Normal start but no brake at end of cycle Is start capacitor abnormally hot Page 41 YES Fuse is blown Defective transformer Defective ribbon cable leads 11 amp 12 Fuse on processor board is blown Processor board is defective Fuse F1 is blown Check motor Defective relay K1M Defective ribbon cable leads 9 amp 10 Defective motor red to white Defective relay K3M Defective capacitor Defe
12. from the Interface circuit board A successful test also proves that the output voltage path from the pick ups through the Interface to the Processor circuit board is in order The test does not prove that the Pick ups are producing the proper output voltage that they are in phase or properly installed mechanically Further troubleshooting is by substitution with a known good part Note Voltage readings below 2 45 are suspect especially when erratic or intermittent measurement problems have been noticed or error codes have appeared such as E34 E35 E36 during Adjustment procedures or E76 E77 E78 E79 during Operators Calibration TOQ END THIS TEST PRESS THE STOP BUTTON Use this code to test the Opto electronic whenever an E73 appears Enter C75C then Press 6 The left display shows the voltage across IR led The proper voltage is approximately 1 20 Volts If displays shows 0 00 volts unplug opto If the Voltage changes to 5 00 volts then opto is defective If the Voltage does not change then the Interface or Processor board is defective If the display shows 5 00 volts with opto plugged in then using a screwdriver short the 2 3 mm screws on the opto If the voltage drops to 0 00 volts then opto is defective If the voltage does not drop then opto cable is damaged interface or processor board is defective TO END THIS TEST PRESS THE STOP BUTTON Revised 3 00 Page 26 Service Manual 39 Series
13. on the left and or right transducer Pick up These voltages can be observed using code C75C then press 5 The proper voltage should be 2 50 0 05 volts Cause These error codes can be caused by a defective interface board or a build up of film on the board The latter fault will become evident in very humid conditions E78 Incorrect output is measured from the left Pick up See code C75 Left Pick up Processor or Interface circuit board may be defective E79 Incorrect output is measured from the right Pick up See code C75 Right Pick up Processor or Interface circuit board may be defective E80 Basic calibration data was not found in the memory Can be that steps 5 and 6 were not stored in the memory during basic adjustment C83 Reset the Function codes and then follow the adjustment procedures C83 amp C84 If error code E80 repeats replace the Interface circuit board E136 Computer data line defect Check ribbon cable to Processor board loose plug Replace the Processor or Interface Circuit board Revised 3 00 Page 15 Service Manual 39 Series ACCURACY TESTS PASSENGER 8 LIGHT TRUCK WHEELS ONLY SHAFT IMBALANCE WHEEL ADAPTER TO SHAFT REMOUNT TEST Make sure electronic compensation is off Check by entering code C4 0 must be displayed If 1 appears switch the balancer off and then back on after a few seconds Set the corresponding rim dimensions and balance a medium size 14 tire to 0 00 ounce in both planes Balan
14. test mode has been added New code was added C21C for the braking cycle time mainly for the 39 LM machine It is selectable from 0 to 9 by pressing the decimal button It can only be accessed by unplugging the opto electronic Code C20C was changed when C47C is accessed or changed The default value is now 46 changed from 50 This effects Geo 39 39 0 models not the Geo 39 LM When C47C is accessed or changed it automatically sets the following codes to original factory settings C1 0 C2 1 C3 1 C5 0 C8 5 0 car 50 0 truck C9 0 25 car 2 0 truck C13 0 C15 1 C17 10 C20 46 car 140 truck C21 3 C24 1 C80 170 car 285 truck Code C47C was changed The opto does not need to be unplugged to access the code Codes that are available only when opto electronic is unplugged C1 C2 C8 C9 C17 C20 C21 C24 C43 When C83C is done step 2 will not accept a value below 85 grams Error codes E3 amp E4 have been eliminated Error code E54 now will appear when C55C is below 16 volts It was 23 volts in previous versions Revised 3 00 Page 43 Service Manual 39 Series Notes Revised 3 00 Page 44 Service Manual 39 Series Geodyna 39 115 Volt diagram ZOSRZIE 19 XDJ 8CLEZ96 L19 Ud OLDJUO eil Aeleg 499445 YOSsNg 6 DPI senbiuyoej Butaupipg UUDUIJOH ZH 09 03 Ud HOA GIL 9313310844 ATTY WYAHL d BulsUudjog UUDUJOH Aq uonozuoyino Ve ynom pajiiwad zou fjeynjosqo si ewos eum jo Gukdoa 10 Buiysijgnd PI
15. threaded center sleeve The backing plate the surface the wheel presses against is extended about 3 4 from previous versions Both types of wheel adapters can be used but it is necessary to set the Distance Gauge Adjustment to match the adapter used See Adjustment Distance Gauge Follow instructions using code C 80 C The value determined must be stored in the memory see Store Adjustments in Memory The Pick up output voltage has changed Check and replace pickups if necessary There may be a wheel weight lodged in or along side the vibratory structure The shaft did not reach measuring speed within 50 revolutions Check the drive motor Opto electronic using codes C54 amp C74 The balancer shaft attempted to turn in the wrong direction Check the drive motor connections and start capacitor Revised 3 00 Page 11 Service Manual 39 Series E34 Note E35 E36 ERROR CODE DIRECTORY Cont Phase difference between Pick ups is more than 3 See codes C61 C65 amp C75 1 Check the Pick up connections at the Interface circuit board Are they connected to the correct terminals 2 Check that the Pick ups are tightly mounted under the shaft in the Vibratory assembly 3 Check that the four vibratory assembly mounting bolts are tight 4 Replace the Pick ups one ata time The display is the phase difference found during the last C83 adjustment In order to display another value it is necessary run C83 again after
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17. 12 C13 C15 SETTING FUNCTION CODES Cont Machine brakes or coasts when the wheel guard is lifted Press the e button to change 1 Brakes Factory set to 0 0 Coasts Selection and entry in grams of the readout suppression of small imbalances Factory set to 5 0 grams Car 50 0 grams Truck All imbalances of the selected weight or less will display 0 grams To enter a new value enter C8C key in the new value press the C button Selection and entry in ounces of the readout suppression of small imbalances Factory set to 0 25 ounce Car 2 0 ounces Truck All imbalances of the selected weight or less will display 0 00 ounces To enter a new value enter C9C key in the new value press the C button Stores selected codes data and adjustments into the computer memory located on the Interface circuit board Enter C 10 C then press buttons 1 amp 3 at the same time Listen for a 3 tone beep Total balancing cycles Entry of this code displays the total number of measuring runs the balancer has operated The maximum count is 999 999 See Code C43C to reset the counter Selects operation by start button or wheel guard Press the e button to change 1 Machine starts as the wheel guard is closed or when the start button is pressed 0 Machine starts only when the start button is pushed Led Light Show Press the e button to change 0 disabled 1 enabled after 5 minutes of non use 2 test always on C17
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19. 9 Series SETTING FUNCTION CODES Cont ADJUSTMENT CODE LIST C14 C20 C80 C83 C84 Operator Calibration Imbalance location adjustment or angle correction Adjustment of rim distance gauge Basic adjustment of the imbalance readout Shaft imbalance correction Revised 3 00 Page 8 Service Manual 39 Series c4 C15 C21 C53 C54 C55 C59 C60 C61 C62 C63 C64 C65 C66 C68 C69 C74 C75 DIAGNOSIS AND TEST CODE LIST Imbalance compensation LED Light show Braking time Display test Opto electronic test Unregulated D C voltage at Processor circuit board Value of the shaft imbalance compensation stored in the Memory Shaft RPM Reference imbalance Value determined during last C83 adjustment Imbalance location displayed in degrees Continuous high resolution imbalance measurement averaged and displayed each 40 revolutions Pick up sensitivity Pick up phase difference in percent Virtual vibratory system dimensions determined during last C83 adjustment Number of revolutions required to reach measuring speed Automatic testing measurement cycle intervals Position disc Opto electronic test Also see C54 Pick up test Opto electronic test Revised 3 00 Page 9 Service Manual 39 Series ERROR CODE DIRECTORY Many of the error codes are followed by the most probable cause of the error 8 or action to be taken This action assumes proper electrical electronic wiring connections
20. ADJUSTMENT PROCEDURES PARTS REPLACEMENT WHICH READJUSTMENT IS NECESSARY Many machine components with the following exceptions can be replaced without resetting the function codes or readjusting the machine Exceptions Eproms See Note A Processor circuit board See Note B Interface circuit board See Note A Pick up s See Note B Machine shaft bearings or drive components See Note B Note A After replacement perform these codes C47C C80C C83C C84C C20C C10C Note B After replacement perform these codes C83C C84C C20C C10C Revised 3 00 Page 27 Service Manual 39 Series ADJUSTMENT PROCEDURES IMPORTANT DO NOT TURN OFF THE POWER THROUGHOUT THE ADJUSTMENTS AFTER COMPLETING THE FOLLOWING PROCEDURES THE DATA MUSTBE STORED IN THE COMPUTER MEMORY SO THATIT IS RETAINED WHEN THE POWER IS SWITCHED OFF SET FUNCTION CODES TO ORIGINAL FACTORY SETTINGS The Setup for Eprom versions 1 10 and above are 2 pages after this page Setup For Eprom Version 0 02 ja Enter C 46 C Ifa 0 appears press the STOP button Ifa 1 appears press the 0 button then press the STOP button m Enter C 47 C The display will show either GEO 39 GEO 40 L GEO40 P GEO 40 8 Press the e repeatedly until GEO 39 appears Press the STOP button x Enter C 1C Ifa 0 appears press the STOP button Ifa 1 appears press the e button then press the STOP button E Enter C 3 C Ifa 1 appears press the STOP button Ifa 0 appears press the e button then press t
21. HOFMANN amp USA GEODYNA 39 39 LM 39M WHEEL BALANCER SERVICE MANUAL SET Service Manual Contents Quick guide for Function and Error codes Setting Function Codes Diagnosis and Test Code List Error Code Directory Accuracy Tests Shaft Imbalance Wheel Adapter Shaft Remount Wheel Adapter Components Readout Accuracy Using the Diagnostic codes Adjustment procedures Parts Replacement Is Readjustment necessary Setup for Eprom Version 0 02 Setup for Eprom Version 1 10 amp above Rim Distance Gauge Readout Adjustment Basic Calibration Geodyna 39 Readout Adjustment Basic Calibration Geodyna 39 M Readout Adjustment Basic Calibration Geodyna 39 LM Balancing the Shaft Adjust the Imbalance location Operator Calibration Trouble Shooting the Electric Control Board Program Updates Eprom Updates Notes Geodyna 39 Series Wiring diagrams Service Manual Revision Updates USA VERSION Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Created 10 13 97 Revised 10 28 97 2 25 98 6 12 98 9 11 98 9 21 98 4 25 99 11 22 99 12 07 99 3 00 Revised 3 00 Page 1 Service Manual 39 Series Auick guide for Error and C Functions Errors Page Functions Page Codes available starting in version number EO 10 C1C 03 28 0 02 E1 10 C2C 03 1 10 E2 10 C3C 03 28 0 02 E5 10 C4C 03 09 19 35 0 02 E6 10 C5C 04 28 0 02 E7 10 C8C 04 28 0 02
22. ON IF ERROR CODE E34 E35 OR E36 APPEARED DURING THE C83 ADJUSTMENT IT IS NECESSARY TO FIND AND CORRECT THE CAUSE OF THE ERROR BEFORE STORING INTO MEMORY Following the above procedure cancels the value stored in the memory to compensate for shaft imbalance It is always necessary to balance the shaft Continue on to step E Revised 3 00 Page 34 Service Manual 39 Series ADJUSTMENT PROCEDURES Cont E Balance the Shaft fT 2 3 Remove the wheel and wheel adapter including the cones threaded sleeve and adapter backing plate Enter C 84 C Press START F Imbalance Location Adjustment 1 2 Mount and balance a wheel to within 1 ounce Enter C 4 C then press the START button The balancer will run through cycle stop and display a 1 in the right display Press the STOP button Attach a weight to the outside of the wheel Press the START button After the wheel stops rotate it until only the center bar is on in the right hand display weight should be at 6 00 Ifthe weight is not at 6 00 proceed to step 4 If it is proceed to step G To Adjust the Geo 39 39 M Loosen the screws that hold the weight tray and then lift the front of the tray up slightly To Adjust the Geo 39 LM remove the display panel Unplug the Opto electronic cable from the Interface board Enter C 20 C Reconnect the Opto electronic cable A number will appear in the right hand display If the weight is before 6 00 enter a n
23. T senbjuyse Bulsudjog UUDLUJOH Jo Kysedoid 24 SUIDUDI UIMOID SIUL GC DUAPO39 SH EES ver p juli MA Wer 20041 vad davis lavis 1 G9E9TL9 YUN 9u 9913 VW LIOA SII Ajddnsiamog A al A SIL DEI ef TC ML LL A OGZ 4n 89 99 MOLIVAVI VI 8 4 V 8 0 Zd 8 4 V 08 H SaSNA WO01d 33 S dn Pld LH LH roza friv09 YO puo WSs Di deeg 4 4 JI i A MI LES9OTLO 4 VO WSN ri poog eopjuezu Ja la BEE KUUA KA ALATA MITAA EEE LEELA ANA ZUZEZUVILILILILIGELOGHEZI 0729719 VO Aen L42 0 9 ven ag p10og 10859901 aoe eh LS E n TL J AOSA Ard uu Kp aie Il CS 97L9 vo VSN pibvog Aojdsig Service Manual 39 Series Page 45 Revised 3 00 Geodyna 39 230 Volt diagram GR 6T PIT senbluyse BUISUDJDG UUBULJOH AQ WOIJDZILOYIND ujia Noy WM peyjituled you Kjeynjosqo a ewos oun jo Du do 10 Bulysiqng py sonbiuyoos BUIDUDJOG UUDLIJOH Jo Aysedoid 943 suowes Bulmoup seul GC DUADNOSS ZOESZ96 219 Xb4 8216796 S19 Yd OLIDJUO jaajlag 4291S Yossnq GC DI senbiuyoej Buloupjpg uunuujoH ZH 09 03 Ud HOA 0 2 807 Kq peyoeyd GaLoaLOdd ATIVNYSHL eee SE SAN ie AA erlvole t VI PUD wie ny EE JUL JB AR AN ri H 93 7T1 MS vo wsn pioog soojiejuj za sad aad L VIS 1 3929219 un 91439919
24. an indication that the capacitor is defective by telling if it is open or shorted It cannot tell if the capacitor is the proper capacitance value A capacitor tester or the following procedure should be used MFD 2650 X Measured Current At the capacitor Measured Line Voltage MFD The Capacitor Value Revised 3 00 Page 39 Service Manual 39 Series Testing of individual components on electric board cont Example For this example a Geodyna 80 115 Volts machine was used The capacitor on the electric board is a 56 67 MFD cap The measured line voltage is 122 Volts and the measured current at the capacitor is 3 Amps 2650 X 3 A 122 V 65 MED 4 Ribbon Cable To test the continuity of the ribbon cable disconnect the cable from the interface board Set the meter to ohms and measure across the indicated wires in both directions The meter should read the indicated value in at least one direction Leave in the relays for this test Wires 12 amp 11 0 8 1 4ohms Wires 6 amp 5 1000 ohms Wires 10 amp 9 1000 ohms Wires 44 13 amp 5 1000 ohms Wires 88 7 1000 ohms 5 Relay Diodes To test the relay diodes mounted on the board set meter to ohms or diode test if meter is so equipped With the relays removed measure across the device as indicated below observing the polarity A White stri Red to Black to Diode p Reading 500 600 ohms Black to Red to E Reading open circuit
25. cIL lo YAYA YA YAYA YAYA HL 6 8 29 S jeje i cib se 9c 9 vo wsn 1889719 va v s n pibog eopje u E VAN dee dee betel TUTE AU e d n rR Li ja S ja i WA woid 33 Z Le 97Z9 16 90 Jo ep A Seer oi non nop Kaf Se Diiren I gece TECCCTCTCTCZLILILILLILESL9GVETI 07229719 FF VO linga ZITO ven p10oog Jossed014 gistrle lz L gazze d Service Manual 39 Series Page 48 Revised 3 00 Service Manual Revision Updates 10 13 97 US version Service Manual created 10 28 97 Pages 1 6 24 25 35 2 25 98 Pages 1 2 3 4 5 8 9 10 11 12 15 16 20 23 25 26 27 28 29 30 6 12 98 Pages 1 5 25 28 29 30 9 11 98 Pages 1 2 3 4 5 6 8 9 20 23 24 25 26 27 37 38 44 9 21 98 Pages 1 3 4 5 6 11 12 13 14 21 22 23 24 25 37 4 25 99 Pages 1 32 11 19 99 Pages 1 28 36 12 07 99 Page 26 3 00 Pages 1 2 27 33 37 Revised 3 00 Page 49 Service Manual 39 Series
26. ce to exactly 0 00 in both planes with the small imbalance suppression C2 turned off Operate the balancer a few times and insure that no more than 0 05 oz is displayed Using the supplied 14 mm Allen wrench loosen the Allen bolt located in the center of the threaded sleeve Rotate the wheel adapter with the balanced tire 180 on the balancer shaft then tighten the Allen bolt Operate the balancer The new imbalance displays should not be larger than 0 25 oz This test proves the wheel balancer shaft is balanced turns true and that the wheel mounting adapter and balancer conical shaft mating surfaces are true If the test produces readings out of tolerance Remove the complete wheel adapter and operate the balancer The display should indicate zero If not balance the shaft following Code C84 see Adjustment Procedures Remove the wheel adapter and check the mating surfaces of the wheel adapter and balancer shaft They should be clean and smooth After cleaning if a further test still produces unacceptable results Run the above test using a known good wheel adapter If another test produce the same results go to B If not replace the threaded sleeve portion of the wheel adapter Using a dial indicator measure the run out at the balancer shaft conical surface The acceptable tolerance is 0 0015 If out of tolerance replace the balancer shaft Revised 3 00 Page 16 Service Manual 39 Series ACCURACY TESTS Cont WHEEL
27. ces The following codes where added C29C 10 0 truck high resolution in grams C30C 50 0 truck low resolution in grams C31C 1 0 car high resolution in grams C32C 5 0 car low resolution in grams When C47C is accessed or changed it automatically sets the following codes to Original Factory Settings C1 0 C2 1 C3 1 C5 0 C8 5 0 car 50 0 truck C9 0 25 car 2 0 truck C13 0 C17 10 C20 50 car 140 truck C24 1 C25 0 50 C26 1 00 C27 0 05 C28 0 25 C29 10 0 C30 50 0 C31 1 0 C32 5 0 C80 170 car 285 truck Codes that are available only when opto electronic is unplugged C1 C2 C8 C9 C17 C24 C25 C26 C27 C28 C29 C30 C31 C32 C43 C47 Revised 3 00 Page 42 Service Manual 39 Series Program Updates Eprom Versions cont Version 1 20 Date 4 97 Codes C1 C2 only the default value can be stored in the permanent memory C1C 0 C2C 1 Code C20 now can only be accessed by unplugging Opto electronic Codes that are available only when opto electronic is unplugged C1 C 2 C 8 C9 C17 C20 C24 C43 C47 Codes C25 through C32 have been omitted When C47C is accessed or changed it automatically sets the following codes to original factory settings C1 0 C2 1 C3 1 C5 0 C8 5 0 car 50 0 truck C9 0 25 car 2 0 truck C13 0 C17 10 C20 50 car 140 truck C24 1 C80 170 car 285 truck Version 1 21 Date 6 98 New code C15C was added for a LED light show It can be set to automatically switch on after 5 minutes of non use and a
28. ctive ribbon cable leads 5 amp 6 Defective motor blue to white Defective capacitor Defective relay K2M Defective relay K2M Defective ribbon cable leads 7 amp 8 Defective relay K1M Defective relay K2M Or Processor circuit board Check mechanics of drive system belt tension pulleys etc Defective relay K3M Service Manual 39 Series Program Updates Eprom Versions Version 0 02 Date 8 96 Geodyna 39 only Code C47C will display these modes GEO 39 40 L 40 P 40 8 Codes that are available only when opto electronic is unplugged C1 C43 C47 C8 cannot be set below 5 grams C9 cannot be set below 0 25 ounces When setting codes to original factory settings each C code has to be done manually The following codes must be set to the factory setting as described in the section SETTING FUNCTION CODES C1 0 C3 1 C5 0 C8 5 0 C9 0 25 C17 10 C20 50 C24 1 In addition these codes have to be set as well C25C 0 50 truck high resolution in ounces C26C 1 00 truck low resolution in ounces C27C 0 05 car high resolution in ounces C28C 0 25 car low resolution in ounces Version 1 10 Date 2 97 Machines Geodyna 39 LM 39 M added A truck balancer 8 Motorcycle balancer Code C47C will display these modes GEO 39 39 L 39 0 40 S Code C46C was deleted Code C2C was added In the truck mode C8 cannot be set below 50 grams In the truck mode C9 cannot be set below 2 oun
29. d return it to the rear of the balancer Revised 3 00 Page 37 Service Manual 39 Series Trouble Shooting the Electric Control Boards Although the electric boards for the above mentioned machines have proven to be very reliable and trouble free most of the components can be easily exchanged should trouble occur For this reason we strongly suggest that every possible attempt be made to repairthese boards on site by substitution of components The circumstances in which a board change is required is if the transformer ribbon cable or relay diodes are defective Each technician should be sure to have all interchangeable components in stock These when used in conjunction with the attached trouble shooting guide should allow almost any electric board repair to be carried out on site Recommended parts for inventory Part Quantity Description 1001036 1 5 Fuse 8 0A 250 volts 1001035 1 5 Fuse 0 8A 250 volts 1001036 3 5 Fuse 12 0 A 250 volts 1001035 2 5 Fuse 0 4A 250 volts 3440068 4 Relay 24 volt coil 3762010 1 1 Capacitor 56 67 MFD 250 VAC Revised 3 00 Page 38 Service Manual 39 Series Testing of individual components on electric board lt lt 7 CAUTION DISCONNECT MACHINE FROM POWER SOURCE gt Uoso BEFORE PERFORMING ANY OF THE FOLLOWING TESTS Es 1 Transformer 1 To test transformer resistance remove fuse F2 from electric board Set your multimeter to ohms and select appropriate scale A T
30. es are measured with a calibrated weight threaded into the centering adapter at an exact known distance and diameter from each pick up The voltages are also measured without the calibrated weight During Readout Adjustment C 8 3 C step 5 the voltage output from the pick ups without the calibrated weight and during step 6 the voltages from the pick ups with the calibrated weight are measured and memorized by the computer This information is stored on a EEPROM located on the Interface circuit board Completing operator calibration requires two operations one with and one without the calibration weight attached to the wheel adapter similar to following steps 5 amp 6 of the Readout Adjustment The computer compares the voltages with those stored during the Readout Adjustment When necessary the computer adjusts the readouts to match the original Readout Adjustment accuracy Operator Calibration procedure Without a wheel on the balancer remove anything else that maybe on the shaft Leave only the threaded shaft and faceplate attached to the balancer shaft The calibration weight is stored in the rear of the weight tray on the left side 1 Enter C 1 4 C 2 Press Start 3 Thread the calibration weight into the wheel adapter backing plate from the right side CAL 4 Press Start At the completion of calibration the machine will stop and emit three beeps Operator Calibration is completed Remove the calibration weight an
31. hat in series with the Pick up output path to the processor is the interface circuit board Tip Whenever a machine is out of calibration chases weights or will not go through C14C or C83C procedures without an error code always check for anything touching the internal balancing structure It is always necessary to remove the weight tray and check carefully for foreign material such as a stray wheel weight It is also necessary to check under the wheel balancer making sure only the three intended points touch the floor Revised 3 00 Page 23 Service Manual 39 Series C63 C65 C68 C69 USING THE DIAGNOSTIC CODES Cont Use this code to set the machine into the continuous display mode As the shaft turns the display will blink each 40 revolutions as updated imbalance inputs are averaged This code is helpful while trouble shooting for a intermittent or erratic read out Enter C 6 3 C Press start waa TO END THE TEST PRESS THE STOP BUT TON Use this code to check the phase difference between the two Pick ups Forthe computer to correctly calculate the imbalance correction weight needed it is necessary that the output voltages from the Pick ups are in phase Error message E34 will display during a Code C83 adjustment if the Pick ups are detected to be out of phase by more than 3 degrees Enter C 6 5 C The phase difference will display srx TO END THE TEST PRESS THE STOP BUTTON Use
32. he STOP button x Enter C 5 C Ifa 0 appears press the STOP button Ifa 1 appears press the e button then press the STOP button Enter C 8 C Press 5 O then C Enter C 9 C Press 0 e2 5 then C m Enter C 17 C Press the e repeatedly until 10 appears then press the STOP button EnterC 20C Press 50 then C Unplug Opto electronic cable from the Interface board enter code reconnect Opto electronic cable Revised 3 00 Page 28 Service Manual 39 Series ADJUSTMENT PROCEDURES Cont Eprom Version 0 02 continued E Enter C 24 C 1 should be in the right hand display If O displays press e key to change Press the Stop button C24 Ka To enter rim distance To enter rim distance in centimeters in millimeters Correct Setting Incorrect Setting C EnterC 25 C Press 0 50 then C Enter C 26 C Press 1 00 then C Enter C 27 C Press 0 05 then C Enter C 28 C Press 0 e 25 then C Continue on with the Rim Distance Gauge Adjustment Revised 3 00 Page 29 Service Manual 39 Series ADJUSTMENT PROCEDURES Cont Setup For Eprom Version 1 10 and above E Enter C 47 C The display will show either GEO 39 GEO 39 L GEO 39 0 GEO 40 S GEO 39 Geodyna 39 Passenger Balancer GEO 39 L Geodyna 39 LM Truck Balancer GEO 39 0 Geodyna 39 M Motorcycle Balancer Press the e button repeatedly until the machine model is displayed Press the STOP button Note When C47C is accessed or changed the following code
33. heel try adjustments again using a steel wheel Revised 3 00 Page 12 Service Manual 39 Series E50 E51 E52 E53 E54 E55 E56 E58 E60 E61 E62 E63 ERROR CODE DIRECTORY Cont Eprom defective The Eproms are mounted on the Processor circuit board sockets ROM 1 and ROM Zandarefield replaceable When this error code appears both Eproms should be replaced Ram defective The Ram is not field replaceable replace the Processor circuit Board Left A D Converter defective The A D converter is not field replaceable replace the Processor circuit Board Right A D Converter defective The A D converter is not field replaceable replace the Processor circuit Board Power supply to the machine measured at the Processor circuit board is low See Error Diagnosis section C55 Power supply to the machine measured at the Processor circuit board is high See Error Diagnosis section C55 A D reference voltage incorrect Replace the Processor circuit board Processor circuit board error PIO Replace the Processor circuit board Display error One of the seven segment displays or LED s is defective Replace the Display circuit board Start stop or keyboard key is stuck closed Can be the Display circuit board or the Processor circuit board defective If replacement of either board is necessary connect a wire from the panel ground to the machine chassis ground Use a panel circuit board hold down stud
34. lectronic defective Test using codes C54 amp C74 amp C75 Opto electronic Processor board may be defective No pulses are measured from the Opto electronic The Processor circuit Board does not recognize that the balancer shaft is turning Does the shaft turn If yes test using codes C54 amp C74 Opto electronic or Processor circuit board may be defective If not the error code is not caused by the Opto electronic Check the power to the machine internal electrical system motor relay fuses and connections If the motor can be heard turning but the balancer shaft does not check the drive belt and tension assembly If the motor hums only and E74 comes on after a few seconds it may be a defective start capacitor Revised 3 00 Page 14 Service Manual 39 Series ERROR CODE DIRECTORY Cont E76 Left Pick up reference voltage incorrect To trouble shoot see E77 E77 Right Pick up reference voltage incorrect To trouble shoot 1 Switch the power off Unplug both Pick ups from the Interface circuit board Switch the power on If E76 77 still displays replace the Interface circuit board If not go to 2 2 Switch the power off Plug the left Pick up into the right terminal and the right Pick up into the left Switch the power on If the error code follows the Pick up replace the Pick up If not replace the Interface circuit board Symptom After turning on power E76 and or E77 appears These error codes indicate a wrong D C voltage
35. lly acceptable If the readings are not acceptable 1 Are you using a wheel known to be true See Important Note above Try the test using another wheel Are the mating surfaces of the wheel adapter backing plate and the threaded sleeve clean and smooth Is there a large amount of play between the center cone and threaded sleeve Check against another cone in the set Run the same test but this time only rotate the cone 180 degree Revised 3 00 Page 17 Service Manual 39 Series ACCURACY TESTS Cont 4 Using a dial indicator measure the radial run out of the threaded sleeve at the point where the threads end The acceptable tolerance is 0 0015 5 Using a dial indicator measure the lateral run out of the wheel adapter face plate as the shaft is rotated 360 degree The acceptable tolerance is 0 0015 6 Use known good wheel adapter components individually to localize the cause of the unacceptable remounting error Revised 3 00 Page 18 Service Manual 39 Series ACCURACY TESTS Cont C4 Use this code to check the balancer imbalance read out accuracy to insure that the proper size and location of the correction weight is called for To use 1 Mount a wheel enter rim sizes and then balance the wheel to within 1 ounce on each side Enter C 4 C AO will show in the right display C4 in the left Press START green button 2 The balancer will run through a cycle stop and display a 1 in the right display The 1 dis
36. ned off To store code settings in the computer memory Enter C 1 0 C Then press keys 1 amp 3 at the same time The Processor circuit board issues three tones signaling the code setting has been stored in the memory X The following codes can only be accessed by unplugging the Opto electronic cable from the Interface board C1 C2 C8 C9 C17 C20 C21 C24 C43 C47 If the codes are entered without having the Opto electronic unplugged a EO will appear C1 Readout resolution round off Press the e decimal button to change Car 1 0 05 Ounce 1 Gram Truck 1 0 50 Ounce 10 0 Gram 0 0 25 Ounce 5 Gram 0 1 00 Ounce 50 0 Gram Factory set to 0 C2 Readout suppression of small imbalances as selected using C9 or C8 Press the e button to turn on or off 1 On Factory set to 1 0 Off If the readout is set to read in ounces the suppression value used is from C9 If the readout is set to read in grams the suppression value used is from C8 C3 Readout in ounces or grams Press the e button to change 1 Ounces Factory set to 1 0 Grams C4 Electronic compensation of the residual imbalance Enter C 4 C then press the Start button to go through a cycle Press the stop button to continue Compensation cannot be stored in the computer memory and retained when power is off It resets to 0 whenever power is turned off 1 On 0 Off Revised 3 00 Page 3 Service Manual 39 Series C5 C8 C9 C10 C
37. ng Leave only the threaded sleeve and backing plate on the balancer shaft Press start 6 Thread the calibration weight into the wheel adapter backing plate Press start CAUTION IF ERROR CODE E34 E35 OR E36 APPEARED DURING THE C83 ADJUSTMENT IT IS NECESSARY TO FIND AND CORRECT THE CAUSE OF THE ERROR BEFORE STORING INTO MEMORY Following the above procedure cancels the value stored in the memory to compensate for shaft imbalance It is always necessary to balance the shaft Continue on to step E Balance the Shaft Revised 3 00 Page 32 Service Manual 39 Series ADJUSTMENT PROCEDURES Cont Readout Adjustment Basic Re calibration Motorcycles Geodyna 39M A B C D Mount a PASSENGER ADAPTER and PASSENGER WHEEL then set corresponding rim width distance and diameter Balance the wheel to within 1 00 ounce in each plane Select a test weight of 3 5 ounces 99 grams or any size between 3 amp 4 ounces 1 ounce 28 35 grams Enter C 83 C 1 Press Start the machine will run through a cycle 2 Enter the size of the selected test weight in grams then press C 3 Attach the test weight on the left side of the wheel Press Start 4 Remove the test weight from the left side and attach it on the right side Press Start 9 Remove the wheel wing nut cone spacer and the passenger adapter Now mount the motorcycle adapter on the machine Press Start
38. ompensation value stored in the memory The value is determined during the Shaft Balance procedure C84 Enter C 59 C The displayed value is the shaft compensation in kg mm srx TO END THE TEST PRESS THE STOP BUTTON Use this code to measure the speed of the balancing shaft The Processor circuit board counts pulses received from the Opto electronic These pulses are the result of a slotted disc read by the Opto electronic as the shaft turns The pulses are routed through the Interface circuit board Enter C 60 C Press start The RPM is displayed Balancing speed is 90 110 RPM nominal erimit TO END THE TEST PRESS THE STOP BUTTON eee Revised 3 00 Page 22 Service Manual 39 Series USING THE DIAGNOSTIC CODES Cont C61 Usethis code to check for changes in the Pick up outputs Each time the balancer readouts are adjusted using the service code C83C a reference value of 1 0000 is stored in the memory for the left and right Pick ups separately Whenever the readouts are adjusted using operator calibration code C14C each value of 1 0000 will change to a higher or lower value The new value reflects the compensation made by the processor circuit board depending on the condition of the each individual pick up output as measured at the processor circuit board Slight variations are acceptable and are the result of aging and temperature or changes in the circuit component path Large variations may not be acceptable and can
39. on display should be on The allowable tolerance is one bar from center If it s out of tolerance see B Remove the test weight from the right side of the wheel and attach it to the left side then operate the machine When the machine stops press and hold in the STOP red button The allowable tolerance is 0 15 ounce as shown in the example above Release the STOP red button First check the rim distance gauge setting following code C80C Then follow the ADJUSTMENT PROCEDURES If the imbalance read out accuracy was found out of tolerance follow as per A If only the location accuracy was found to be out of tolerance then adjust the location using the code C20C If it is properly adjusted then the wheel has probably slipped on the balancer shaft while braking it There is also a slight possibility that there is a problem with a pick up or Opto electronic Ifthese two components are suspected substitution with known good parts is the only method of trouble shooting TO END THE TEST PRESS C 4 C THE e KEY 8 THE STOP BUTTON Revised 3 00 Page 20 Service Manual 39 Series USING THE DIAGNOSTIC CODES To use the codes enter C code then C C53 Use this code to check the display circuit board Enter C53C All LED segments will light If one or more segments are defective error message E60 would have displayed when the machine was switched on To correct for a missing segment it is recommended to replace the display circuit board
40. played means that the out of balance wheel has been measured by the computer The measured imbalance will be subtracted from the next measurement runs The test wheel imbalance will remain stored in the computer memory until the machine is switched off or until C4 is again selected and the 1 is changed to a 0 by pressing the e button 3 Press and hold the STOP red button The right and left display will each show 0 00 Release the STOP button 4 Select a hammer on type wheel weight of about 3 ounces for this test It is important that you are sure that the actual weight agrees with what is marked on the weight Be sure that the weight has not been clipped 5 Attach the weight to the right side of the wheel then operate the balancer 6 When the balancer stops press and hold in the STOP red button A weight reading corresponding to the test weight is shown in the right display The allowable tolerance is 0 15 ounce T A weight reading is also shown in the left display The maximum allowable reading is 0 15 ounce If it s out of tolerance see A on next page Release the STOP red button Example If a 3 ounce test weight was selected It is acceptable if the display shows between 2 85 and 3 15 for test weight side and no more than 0 15 for the opposite side Revised 3 00 Page 19 Service Manual 39 Series A B ACCURACY TEST Cont Position the test weight at exactly 6 o clock The center bar of the right locati
41. ransformer primary resistance Place meter leads on L2 terminal and load side of fuse F2 Resistance should be approximately 22 26 ohms B Transformer secondary resistance Remove ribbon cable leads 12 and 11 from the interface board Place meter leads across these wires 12 and 11 Resistance should be approximately 0 8 1 4 ohms 2 To test output voltage of the transformer install fuse F2 set meter to Vac and select the appropriate range Leaving ribbon cable leads 12 and 11 disconnected from the interface board place meter leads across the wires and turn on machine Voltage should be approximately 19 26 vac 2 Relays To test the relays remove them from the board and set meter to ohms Measure across the terminals indicated below A Coil resistance measured across terminal 1 amp 2 should be approximately 1000 ohms 345 B Normally closed contacts measured across E VAT terminal 3 amp 4 2 i TII should be approximately 0 ohms C Normally open contacts measured across Relay bottom view terminal 4 amp 5 should be approximately open circuit 3 Start Capacitor To test the start capacitor remove the black leads at the capacitor Set the meter to ohms low to middle scale Touch the meter leads across the terminals of the capacitor The resistance should jump towards zero then gradually increase Now reverse the meter leads and the meter should do the same again This test can give
42. replacing each Pick up Left Pick up output voltage does not correspond to rim width or distance settings during code C83 adjustment See E36 for troubleshooting Right Pick up output voltage does not correspond to rim width or distance settings during code C83 adjustment To trouble shoot 1 2 See code C61C Check that the actual rim width use Hofmann calipers and distance has been set Has the C80 procedure rim distance adjustment been properly followed Check that the machine is sitting solidly on the floor and only resting on the three mounting pads Tilt the machine back to check underneath for wheel weights etc If the machine is bolted to the floor make sure either all bolts are tight or all are loose to eliminate the possibility that one mounting pad is not solidly touching the floor It is best to loosen all three mounting bolts and tilt the machine back to check for anything under the machine Check for a wheel weight lodged in or along side the vibratory structure Check the Pick up connections at the Interface circuit board If E36 is displayed with E34 it s likely the problem is a defective pick up Check that the Pick ups are tightly mounted under the shaft in the vibratory system They should not turn by hand Check that the four vibratory system mounting bolts are tight Try C83 Readout adjustment again using another wheel and tire assembly or only a wheel If C83 adjustment was attempted using a thick alloy w
43. s are automatically set to the default values For 39 39 0 For 39 L Codes available starting in C1C 0 0 1 10 Readout Resolution Car 0 250z 5 gr Truck 1 00 oz 50 gr C2C 1 1 1 10 Suppression on C3C 1 1 1 10 Displays ounces C5C 0 0 1 10 Coasts when wheel guard raised for possible future use C8C 5 0 50 0 1 10 Suppression value in grams C9C 0 25 2 0 1 10 Suppression value in ounces C13C 0 0 1 10 Disable wheel guard start for possible future use C15C 1 1 1 21 LED light show C17C 10 10 1 10 Number of revolutions for measurement C20C 50 46 140 1 10 Angle correction C21C 3 3 1 21 Brake cycle time C24C 1 1 1 10 Distance entry in cm C25C 0 50 0 50 1 10 only Truck high resolution in ounces C26C 1 00 1 00 1 10 only Truck low resolution in ounces C27C 0 05 0 05 1 10 only Car high resolution in ounces C28C 0 25 0 25 1 10 only Car low resolution in ounces C29C 10 0 10 0 1 10 only Truck high resolution in grams C30C 50 0 50 0 1 10 only Truck low resolution in grams C31C 1 0 1 0 1 10 only Car high resolution in grams C32C 5 0 5 0 1 10 only Car low resolution in grams C80 170 285 1 10 Adapter flange distance in mm Eprom version 1 21 Default value 46 Reset any individual Function Codes if necessary See Setting Function Codes Unplug Opto electronic cable from the Interface board enter code reconnect Opto electronic cable For Eprom version 1 21 this does not have to be done to enter C47C Revised 3 00 Page 30 Service Manual 39 Series
44. this code to check the operation of the electrical system Enter C 68 C The left display shows the number of shaft revolutions reguired to reach measurement speed during the last measurement The right display shows the number of shaft revolutions reguired to reach the speed where the motor start capacitor switching relay dropped out during the last measurement cycle mama TO END THE TEST PRESS THE STOP BUTTON Use this code to set up the automatic measurement cycle This cycle can be used to allow an unattended machine to measure brake to a stop sit at rest then measure brake to a stop continuously The rest intervals can be selected This code is helpful while troubleshooting any intermittent problem especially in an eguipment repair shop environment Enter C 6 9 C The left display will show 1 This is rest interval one The right display will show 50 This is the preset rest interval in seconds To change the interval key in a new interval in seconds then press the C key The left display will show 2 This is preset rest interval two The right display will show 170 To change the interval key in a newinterval in seconds Press the start button The machine will cycle continuously mama TO END THE TEST PRESS THE STOP BUTTON Revised 3 00 Page 24 Service Manual 39 Series USING THE DIAGNOSTIC CODES Cont C74 Use this code as a quick check of the Opto electronic without the shaft turning under po
45. umber higher than the displayed default number press the C button If the weight is after 6 00 enter a number lower than the displayed default number press the C button Press the START button and check to see if the location is correct if not perform adjustment again Continue on to Step G storing the calibration data into the permanent memory Revised 3 00 Page 35 Service Manual 39 Series ADJUSTMENT PROCEDURES Cont AFTER PERFORMING THE ADJUSTMENT PROCEDURES THE CALIBRATION DATA MUST NOW BE STORED IN THE COMPUTER MEMORY SO THAT IT WILL BE RETAINED WHEN THE POWER IS SWITCHED OFF To store the adjustments into the computer memory G Store adjustments and function codes into the machine memory 1 Enter C 10 C C10 i 2 Press buttons 1 and 3 at the same time The Processor circuit board issues three tones signaling the code setting has been stored in the memory Revised 3 00 Page 36 Service Manual 39 Series Operator Calibration Intended for the user to fine tune the balancer calibration it can also be used by the service technician rather than Readout Adjustment if only a slight readjustment to the readout accuracy is required The basic theory During certain steps of the Readout Adjustment C 8 3 C procedure imbalance forces created with and without a calibrated weight called the Calibration Weight attached to the wheel centering adapter are measured as an output voltage from each pick up These voltag
46. voltage Reconnect the Opto electronic cable and reassemble machine Revised 3 00 Page 6 Service Manual 39 Series SETTING FUNCTION CODES Cont C47 Sets the computer to operate in a specific balancer mode For version 1 10 and above the display will show GEO 39 or GEO 39 L or GEO 39 0 or GEO 40 8 Press the e key to change GEO 39 Geodyna 39 Passenger balancer GEO 39 L Geodyna 39 LM Truck balancer GEO 39 0 Geodyna 39 M Motorcycle balancer Note For previous Eprom program versions refer to Program Updates When C47C is accessed or changed the following codes are automatically set to the default values below For Eprom Versions 1 20 and above for previous versions see program updates Eprom version 0 02 each code has to be set manually FOR 39 39 0 FOR 39 L C1 0 C1 0 C2 1 C2 1 C3 1 C3 1 C5 0 C5 0 C8 5 0 C8 50 0 C9 0 25 C9 2 0 C13 0 C13 0 C15 1 C15 1 C17 10 C17 10 C20 50 46 C20 140 C21 3 C21 3 C24 1 C24 1 C80 170 C80 285 For Eprom version 1 21 Revised 3 00 Page 7 Readout Resolution Car 0 250z 5 gr Truck 1 00 oz 50 gr Suppression on Displays ounces Brakes w wheel guard for possible future use Suppression value in grams Suppression value in ounces Disable wheel guard start for possible future use LED light show on Number of revolutions for measurement Angle correction Brake cycle time Distance entry in cm Adapter flange distance in mm Service Manual 3
47. wer For the complete Opto electronic test use code C54 Enter C 7 4 C The left display will show C74 The right display will show a number from 0 to 255 Rotate the shaft the numbers will change counting in ascending order as the shaft is turned clockwise and descending as the shaft is turned counterclockwise ama TO END THE TEST PRESS THE STOP BUTTON 0e Revised 3 00 Page 25 Service Manual 39 Series C75 C75 USING THE DIAGNOSTIC CODES Cont Use this code to check the Pick ups The Pick ups are mounted into the imbalance measuring structure of the machine They are made of a material that when force is applied generate a voltage proportional to the force Upon entering this test exactly 2 5 volts is applied to each Pick up The test measures the voltage drop across the Pick ups Enter C 7 5 C then press 5 The left and right displays will each show a voltage This voltage is a reference voltage about 2 50 v less the voltage drop The left display shows the left Pick up reference voltage The right display shows the right reference voltage The acceptable tolerance is 2 45 to 2 55 A voltage below 2 20 will display an error message during the self test when power is applied to the balancer The pick ups are further tested by pressing down on the balancer shaft while watching the displays The displays should vary above and below the nominal 2 50 volts This test proves if the Pick ups are shorted open or disconnected
48. yield error codes or balance problems The Pick up outputs and the circuit component path determine readout location accuracy and imbalance readout separation between correction planes To monitor the reference outputs Enter C61C The left location LED s will light and the display will show the left Pick up reference voltage Pressing the decimal key will light the right location LED s and the right pick up reference voltage displays Pressing the decimal key will toggle between the left and right reference voltage The code can be helpful for troubleshooting a machine that may continually reguire readjustment via user calibration code C14C or a machine that develops a measurement related error code or chases weights during operation Example The customer complains that the machine usually does not balance a wheel to zero in one or two spins The operator is chasing weights around the rim After running the machine through C14C the technician using code C61C finds that the value for the right Pick up is 1 0030 little change from the reference of 1 0000 but the value for the left pick up is 9000 a larger change This indicates the likely cause of the problem is a faulty or loose left pick up When troubleshooting be aware that the reference voltage is measured by the processor circuit board and not directly read at the Pick up This means that the large difference in output can have a cause other than the pickup Be aware t
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