2007 Sears Treadmill Service Manual
Contents
1. x on E EE ost edes E 0000 0000 9 2000 0 00 0 n sis 0000090 9 4 1 9 B gg Sl o ais is oOo E E Bes Bn i E 2 Bo e Sei WENN j B B B 5 E m B S egy 9 9 00 eyes n on a Jaa aa 22 Sst a e 9g Te 4 e ge 8 Qu 9 Mm gaa BEBE e 808 e sr E rc M T EE 11 7 p eer 0000 ToT e g BE e 000 E Magg s as ES o Is Es spes Lac ac ac 4004040 co gt 6 S r OWO LO O ra ors 6210 229 e 5 eel User 1 Console Cable Safety Key User 2 HR Grip Receiver Shaft Signal Interface Heart Rate Reciever RST5 6 amp RCT 7 6 Sears Service Manual 2007 RCT 7 6 Upper Board LED Floating Display Connection Fan Connection 2152520 lets EDT CEU2. D 2007 Sears HORIZON Treadmill Service Manual FITNESS Table Of Contents Elevation Troubleshooting No Motor Movement Troubleshooting Erratic Speed Troubleshooting Auto Calibration Troubleshooting Console Upper Board Troubleshooting Membrane Keypad Overlay Troubleshooting Safety Key Reed Switch Troubleshooting Heart Rate Troubleshooting Circuit Breaker Troubleshooting Engineering Mode Digital Drive Wiring RST 5 6 Upper Board RCT 7 6 Upper Board Power Source Wiring Diagram No Motor Movement Voltage Check Points Cut Console Cable Voltage Chart Incline Wire Voltage Chart Reseting The Incline Motor Lubrication Procedure 10 11 12 14 15 17 18 19 20 21 23 25 26 27 IMPORTANT aunn RST5 6 amp RCT 7 6 Sears Service Manual 2007 Elevation Troubleshooting It s recommended to send console cables for elevation repairs on all models using sectional console cables Symptom Possible Cause Test Procedure Elevation motor starts running as soon as the power is turned on Constant down Elevation motor bobs up and down with command Elevation motor does not reach minimum or maximum settings Elevation is stuck down and does not function Console is responsive to the buttons being pressed Elevation is stuck at the highest position and is will not come down Console is responsive to the but tons being pressed Elevation inclines to the high est position as so
3. 10 0 0 0 0 10101010 m BBS 000400100 0 01010 0010 0001000100 em Tog io 010100 0 0 00 0000000000000000000000000 99999980009 190818808087 00000000000000000000000 3088999 IS ok Hue Ko 0 0 P 7 USER 1 5 noo Safety Key Speed Up and Down USER 2 Key USER 1Key Elevation Up and Down Heart Rate Reciever RST5 6 amp RCT 7 6 Sears Service Manual 2007 Power Source Wiring Diagram To Motor Control Board ON OFF SOCKET SWITCH BREAKER A Socket wire to breaker or on off switch Wire length will determine connection point B Ground Socket wire to breaker or on off switch Wire length will determine connection point D On Off switch to motor control board E On Off switch to motor control board F On Off switch to breaker Note Wires A amp C are interchangeable RST5 6 amp RCT 7 6 Sears Service Manual 2007 No Motor Movement Voltage Checkpoints Upper Board Checkpoints Procedures Using a dc volt meter if non auto ranging set for the 20vdc rang
4. no down incline Incline value 0 no down incline 0 6 vdc Constant down incline no up incline Incline value at max no up incline Pot 2 4 vdc constant 2 4 vdc constant 2 4 vdc constant Constant down incline no up incline Incline value started one less than max pressed up once and value maxed out thereafter no up incline The voltage changes as the incline changes Large Quick Connects After Start Wire Color Function Before Start Not Inclining Or While While Declining Normal Mode Results ENG 1 Test Results Declining Incline Up 0 15 vac 0 15 vac 171 vac 120 vac Up incline works no down Up incline works down does not Value incline increases does not decrease Incline 10 15 vac 0 15 vac 120 vac 186 vac Down incline works no up Down incline works until value 0 up Down incline does not Value decreases to 0 then no down incline does not increase Ground 10 03 vac 0 03 vac 219 vac 226 vac Neither up nor down function Neither up nor down function Value w black does not change as ground Parameter Use functioning incline motor and remove one wire at a time to observe malfunction RST5 6 amp RCT 7 6 Sears Service Manual 2007 Resetting The Incline Motor After Replacing The Motor Control Board Tools Required e Philips Screwdriver e 17mm Socket e 17mm Combination Wrench Procedure 1 Turn off power to the treadmill and unplug power cord from wall outlet 2 Replace the Motor
5. replace fan RST5 6 amp RCT 7 6 Sears Service Manual 2007 Membrane Key Pad Overlay Troubleshooting Symptom Possible Cause Test Procedure All or some of the keys on the Ribbon cables connecting the Verify the ribbon cables are Remove and reseat cables console will not work membrane keypad to upper connected securely into the board are not seated properly or upper board are disconnected or membrane Reference Upper Board Wiring keypad is defective Diagram User 1 amp 2 Connections p 18 amp p 19 Upper board or raised tactile Keys are pressed and there are Replace upper board buttons defective corresponding beeps but console does not respond Sometime the key will not beep until it is released RST5 6 amp RCT 7 6 Sears Service Manual 2007 Safety Key Reed Switch Troubleshooting Symptom Possible Cause Test Procedure Console only displays dashes in Safety key is positioned Remove safety key and reapply Replace safety key the display window Magnet incorrectly or has failed Test magnet style key Failed reed switch Short the switch connector on If the upper board still displays the upper board by using a flat dashes then replace upper blade screwdriver or by placing board Otherwise replace reed a jumper switch on the SWitch connector Reference Upper Board Wiring Diagram p 18 amp p 19 RST5 6 4 RCT 7 6 Sears Service Manual 2007 Heart Rate Troubleshooting Symptom
6. Control Board 3 Fold treadmill into locked position 4 Undo bolt that attaches the elevation tube to the bottom of the machine Figure 1 Figure 2 Figure 1 17 mm Nut SUV 17 mm Bolt o Proper Zero Shaft Position f D U 5 Power up the machine and let the incline spin freely in the tube until it reaches its zero position and then turn power off 6 Spin shaft manually until it is almost flush with the incline motor casing and only about 1 thread is visible Figure 2 7 Reinsert bolt and power up the machine 8 Test the incline function and calibrate the unit RST5 6 amp RCT 7 6 Sears Service Manual 2007 Lubrication Procedure EVERY 6 MONTHS OR 150 MILES It is necessary to lubricate your treadmill running deck every six months or 150 miles to maintain optimal performance of your treadmill Once the treadmill reaches 150 miles the console will prompt you to lubricate the treadmill Only use lubricant designated for treadmills available by calling Sears at 1 800 4 MY HOME e TURN OFF THE TREADMILL with the on off switch then unplug the power cord at the wall outlet e Loosen both the rear roller bolts For best results place two removable marks on both sides of the frame and note roller position Once the belt is loosened take the bottle of lubricant and apply it to the entire top surface of the running deck Tighten
7. both rear roller bolts matching up the marks for proper position to original position After you have applied lubricant plug in the power cord insert the safety key start the treadmill and walk on the belt for two minutes to spread the lubricant e Lubricate the air shocks with Teflon based spray e Once lubrication is complete reset the console by pressing and holding STOP and Speed buttons for 5 seconds NOTE The Treadmill will not operate when the message is showing You may hold STOP for 5 seconds to suspend message for 5 miles LUBRICATION BELT Horizon Fitness 1620 Landmark Drive Cottage Grove WI 53527 Phone 608 842 1650 Fax 608 839 1280 e mail Comments horizonfitness com Version 1 0 CTS 02 07 07 HORIZON FITNESS
8. cord power Wires motor wires or console cable Verify the connections of above wires and cords Reference Cut Console Cable Voltage Chart p 23 amp 24 Place hand underneath running belt and feel for adequate silicone application Reference No Motor Movement Voltage Check Points p 21 Replace optic sensor Replace MCB If unit fails to auto calibrate refer to auto calibration troubleshooting Tighten running belt Reference Owners Manual p 14 Tighten drive belt If the AC voltage is missing or incorrect check the AC service or consult an electrician Replace parts as needed Apply silicone Reference Lubrication Procedure p 27 Replace MCB RST5 6 amp RCT 7 6 Sears Service Manual 2007 Erratic Speed Troubleshooting Continued Symptom Possible Cause Test Procedure Erratic Speeds belt speed In a program Remove safely key then replace increases without command but Start in PI and see If reoccurs shows change on display and Enter EN90 button test and test beeps all buttons Reference Engineering Mode p 15 amp p 16 Stuck button Remove Upper Control Board If button does not stick when re Check if button works properly moved from Upper Control Board once removed from face plate then replace the face plate After removing Uper Control Board if button is still stuck then replace Upper Control Board RST5 6 amp RCT 7 6 Sears Service Manual 2007 Auto Calibrati
9. information portion of the display will show Eng1 e The matrix will scroll HARDWARE TEST e After entered press Start to begin Eng2 Auto Calibration e he information portion of the display will show Eng2 e The matrix will scroll AUTO CALIBRATE e After entered press Start to begin e There should be no excessive speed overshoot e The Engineering Menu will be exited upon successful completion Eng3 Switch Function e The information portion of the display will show Eng3 e The matrix will scroll SWITCH FUNCTION e Start selects miles or km o The display will show 0 for miles or 1 for km o The display will scroll MILES or KM when Start is pressed to change o The new setting is automatically saved when Start is pressed no other buttons need to be pressed to save e Enter changes the model if applicable 0 The new setting is automatically saved RST5 6 amp RCT 7 6 Sears Service Manual 2007 Engineering Mode Continued e f the treadmill has a Demo Mode then Eng3 will also have the following 173 174 2 3T 3 3T 5 3T 14 6 L 925T RCT7 6 30519 6201 7207 7301 820T 830T 930T o The Brickyard will scroll DEMO ON or DEMO OFF o The default will be DEMO ON 0 The 4 buttons will change between the Demo On and Demo Off settings o The mile km will continue to function as normal Eng4 Information e he information portion of the display will show Eng4 e The matrix will scroll INFORMATI
10. Checkpoints p 21 Measure voltage output from Replace drive motor motor Reference No Motor Movement Voltage Checkpoints p 21 Reference No Motor Replace optic sensor Movement Voltage Checkpoints p 21 Erratic speeds Upon pressing start belt speed increases rapidly and then comes to a complete stop quickly Erratic speeds Upon pressing start belt speed increases rapidly and does not stop Erratic speeds Running belt speed is not stable RST5 6 amp RCT 7 6 Sears Service Manual 2007 Erratic Speed Troubleshooting Symptom Possible Cause Test Procedure Failed optic sensor Failed motor control board MCB Machine not calibrated properly Running belt is too loose or too tight Drive belt is too loose or too tight Inadequate power Failed or improper wiring Inadequate lubrication on deck and running bell Failed motor control board MCB Reference No Motor Movement Voltage Checkpoints p 21 Run auto calibration Reference Engineering Mode p 15 amp p 16 The running belt should not slip at all when customer is using the machine The drive belt should have approximately 3 8 of inch deflection Check for dedicated circuit 20 amp is ideal and check wall out let voltage 120 VAC Reference Power Source Wiring Diagram p 20 Make sure machine is not on extension cord or surge protector Verify there are no pinches or cuts in the power
11. ON e Once entered the display will scroll ACCUMULATED TIME o F00 will appear in the information portion of the display along with the accumulated time e Speed or Incline will switch between the accumulated time and distance e When changed the display will scroll ACCUMULATED DISTANCE o F01 will appear in the information portion of the display along with the accumulated distance in miles or km de pending upon current setting Note 1 There should be no Manual Calibration This function is not needed Note 2 There should be no Roller Diameter Value set up This should be done internal to the software If there are multiple models included in one software package the program should automatically adjust the roller diameter value There is no need for the user to change RST5 6 amp RCT 7 6 Sears Service Manual 2007 Digital Drive Wiring Diagram 400 A Aq dosuag ond Josuos Hu NMOG amd E 1 Jo 0d Wdal punoar eri pensi 99A TH 4030 A OVA 01 011 p100 RST5 6 amp RCT 7 6 Sears Service Manual 2007 RST 5 6 Upper Board LCD Floating Display Connection
12. Possible Cause Test Procedure eart rate erratic or no heart User error Reference p 13 ate function Hand Grips Failed heart rate grips Reference p 13 If there is absolutely no heart response replace heart rate grips Failed heart rate receiver Reference p 13 If proper heart rate instructions are followed and heart rate continues to be erratic replace upper control board RST5 6 amp RCT 7 6 Sears Service Manual 2007 Heart Rate Troubleshooting Heart Rate Troubleshooting Problem There is no heart rate reading Solution Remove the console and verify that the heart rate cables are attached properly not damaged cut or pinched making sure that the cables are securely inserted into the console Check your exercise environment for sources of interference such as large motors from other appliances security intercom sys tems fluorescent lights cordless phone etc You may experience an erratic Heart Rate readout under the following conditions e Gripping the heart rate handlebars too tight Try to maintain moderate pressure while holding onto the heart rate handlebars e Constant movement and vibration due to constantly holding the heart rate grips while exercising try stopping your workout while taking pulse e When you are breathing heavily during a workout e When your hands are constricted by wearing a ring e When your hands are dry or cold Try moistening your palms or rubbing them together to warm e Any
13. Service Manual 2007 Console Upper Board Troubleshooting Symptom Possible Cause Test Procedure No display on the console and Circuit breaker in home has Check for dedicated circuit 20 Reset breaker power switch on machine is tripped amp is ideal and check wall dark outlet voltage 120 VAC Reference Power Source Wiring p 20 No display on the console and Breaker on machine has tripped Reset breaker Replace breaker if necessary power switch on machine is lit or has failed Reference Power Source Wiring p 20 Failed power switch Make sure power switch is Replace power switch if turned on necessaly Reference Power Source Wiring p 20 Failed power cord Take voltage check of power Replace power cord cord Reference Power Source Wiring p 20 Improper wiring or AC wires Check all wiring coming in from Connect wires correctly or have failed the power switch to the motor replace as needed control board and to the upper board Reference Power Source Wiring p 20 Reference Digital Drive Wiring Diagram p 17 Reference Upper Board Wiring Diagrams p 18 amp p 19 Failed Console cable If LED s on motor control board Replace console cable are present Check console cable voltages at B7 B8 Reference Cut Console Cable Voltage Chart p 23 amp 24 Failed Upper board Check voltage and continuity of Replace upper board console cable Reference Cut Console Cable Voltage Ch
14. art p 23 amp 24 Reference Upper Board Wiring Diagrams p 18 amp p 19 RST5 6 amp RCT 7 6 Sears Service Manual 2007 Console Upper Board Troubleshooting Continued Symptom Possible Cause Test Procedure Running belt stops console resets during workout Fan Dosent Work at all or is malfunctioning Safely key or reed switch is positioned incorrectly Safety key is damaged Inadequate power Damaged or improper wiring Inadequate lubrication on deck and running belt Failed Fan or Fan is disconnected Verify that the safety key is in position and that it is secure Check for dedicated circuit 20 amp is ideal and check wall outlet voltage 120 VAC Reference Power Source Wiring Diagram p 20 Make sure machine is not on extension cord or surge protector Verify there are no pinches or cuts in the power cord power wires motor wires or console cable Verify the connections of above wires and cords Reference Upper Board Wiring Diagram p 18 amp p 19 Place hand underneath running belt and feel for adequate silicone application Verify fan is seated properly and not disconnected Reference Upper Board Wiring Diagrams p 18 amp p 19 Replace safety key If the AC voltage is missing or incorrect check the AC service or consult an electrician Replace parts as needed Apply silicone Reference Lubrication Procedure p 27 If Fan is seated properly
15. ctional system A variance from the norm would indicate a defective component Checkpoint Voltage Before Start Voltage After Start amp 0 5mph Voltage AFter Start amp 10 0mph Across Motor Out 0 0 22 5 vdc 0 0 22 5 vdc 0 0 22 5 vdc No Motor Attached Across Motor Out 0 0 vdc 2 5 10 vdc 100 0 vdc W Motor Attached Drive Motor Checkpoints Procedures Unplug the motor from the lower board Using a dc volt meter if non auto ranging set for the 20vdc range attach volt meter leads directly into the motor leads and turn the running belt Desired Results The motor should generate 5 15 vdc depending on the speed it is turned Procedures Unplug the motor from the lower board Using an ohm meter if non auto ranging set for the 200 ohm range attach ohm meter leads directly into the motor leads Desired Results The motor should read approximately 1 0 1 5 ohms RST5 6 amp RCT 7 6 Sears Service Manual 2007 Console Cable Voltage Chart DC Volts Incline VCC Incline Pot Incline GND Digital GND Digital GND RPM Power Voltage to UCB Power Voltage to UCB B9 Speed Command PWM B10 Drive Motor Relay B11 Incline Down B12 Incline Up tage Readings Incline VCC 2 5 vde constant Brown Incline Pot 2 5 vde at 0 0 incline 0 5 vdc at max incline Voltage changes with each change in incline Incline GND n a ground E e Remum eee When sensor not aligned open 4 5 0vdc Grey Speed C
16. e test the voltage at the grey and again at the white console cable connections using the yellow orange or red wires as ground Two tests are to be performed test once with power on before the treadmill is started and again after Start is pressed Desired Results The voltage charts contain typical desired results on a fully functional system A variance from the norm would indicate a defective compo nent Checkpoint Voltage Before Start Voltage After Start Console Cable Grey to Yellow Gnd 0 3 vdc increases as increases as shown on console Console Cable White to Yellow IT NE owe 0 vdc Lower Board Checkpoints Console Cable Connection Procedures Using a dc volt meter if non auto ranging set for the 20vdc range test the voltage at the grey and again at the white console cable connections using the yellow orange or red wires as ground Two tests are to be performed test once with power on before the treadmill is started and again after Start is pressed Note this is the same procedure as the upper board console cable connection If results vary from the upper board the console cable is the likely cause and a continuity check should be performed Desired Results The voltage charts contain typical desired results on a fully functional system A variance from the norm would indicate a defective compo nent Checkpoint Voltage Before Start Voltage After Start Console Cable Grey to Yellow Gnd 0 3 vdc increases as
17. ommand 0 0 vdc before started 0 5 vdc at 0 5 mph 4 vdc PWM at 10 mph Voltage changes as speed changes Pink Incline Down 0 0 vdc before started 0 0 vdc while inclining 4 1 9 vdc while declining Voltage constant while inclining declining Light Blue Incline Up 0 0 vdc before started 1 9 vdc while inclining 0 0 vdc while declining Voltage constant while inclining declining 10 11 12 White Drive Motor Relay 44 3 vdc before started 0 0 vdc after started RST5 6 amp RCT 7 6 Sears Service Manual 2007 Cut Console Cable Voltage Chart DC Volts Incline VCC Incline Pot Incline GND Digital GND Digital GND RPM Power Voltage to UCB Power Voltage to UCB Speed Command PWM B10 Drive Motor Relay B11 Incline Down B12 Incline Up ert Voltage at UCB Voltage at MCB Physical Symptoms Incline VCC mom om Start pressed constant down incline m Incline Pot mom m Start pressed constant down incline 3 Incline GND 2 5 vdc grounded at 0 0 vdc grounded at Constant up incline In Hardware Test motor moves up and down MCB not UCB MCB not UCB Incline value started low and went down to 0 but not up past 10 Value changes very slowly Digital GND If one removed no issues If both removed UCB does not turn on Green 5 0 vdc 0 0 vdc Everything works in normal mode but the console does not register a m in Hardware Test or Auto Calibration Power Voltage to UCB bo
18. on Troubleshooting Symptom Possible Cause Test Procedure Failed Auto Calibration Belt runs Failed RPM sensor Put machine into Engl and check Replace RPM sensor for a few seconds and then stops for slight fluctuation of speed in and El message on console speed window of display Speed should not fluctuate more than a few hundredths RPM sensor misaligned Adjust sensor bracket to correct position Failed console cable Check voltage and continuity of Replace console cable console cable Reference Cut Console Cable Voltage Chart p 23 amp 24 Magnet missing in front roller Replace magnet pulley Failed Auto Calibration Belt never Reference Troubleshooting for no runs and El message on console motor movement p 4 Failed Auto Calibration Board RPM sensor not aligned properly or Verify positioning of sensor wire Replace RPM sensor never sets speeds Belt will con has failed Wire coming from RPM sensor tinue to run and not stop points toward the front of the unit sensor is as close as possible to the magnet in the pulley without touching and the sensor bracket 90 degree angle not bent in any way Put machine into Engl and check for slight fluctuation of speed in speed window of display Speed should not fluctuate more than a few hundredths Failed motor control board MCB If other tests mentioned above are Replace MCB normal then replace MCB RST5 6 amp RCT 7 6 Sears
19. on as power is applied The incline will go up but not down very rare Failed lower board Failed elevation motor Failed elevation motor Failed console cable Failed elevation motor Failed upper board Failed upper board lower board very rare for models made after 2003 console cable and elevation motor Failed lower board Failed lower board Turn on power Do not press start Wait 30 60 seconds and see if motor is hot Use caution Motor can get very hot Referance Incline Voltage Chart p 25 Verify there are no pinches or cuts on the elevation wires Verify the connections of above wires Referance Incline WVoltage Chart p 25 Verify console cable connections Verify there are no pinches or cuts in the cable Referance Console Cable Voltage Chart p 26 Put machine in hardware test Engl and press start Eleva tion doesn t respond buttons are pressed You may see a value for elevation that reads 255 or 1023 That value will not change when the buttons are pressed Referance Incline Voltage Chart p 25 Put machine in hardware test Engl and press start Incline will work in hardware test only Reference Engineering Modes p 15 Verify all wire connections If the incline went into the highest position without start being pressed The incline will act normally when going up but when the down incline is pressed there is no movement Replace lo
20. one with heavy arrhythmia e Anyone with arteriosclerosis or peripheral circulation disorder e Anyone whose skin on the measuring palms is especially thick NOTE Outside interference sources such as computers motors and fluorescent lights may cause the heart rate reading to be erratic Proper use instructions Handlebars Place the palm of your hands directly on the grip pulse handlebars Both hands must grip the bars for your heart rate to register It takes 5 consecutive heart beats 15 20 seconds for your heart rate to register When gripping the pulse handlebars do not grip tightly Holding the grips tightly may elevate your blood pressure Keep a loose cupping hold You may experience an erratic readout if consistently holding the grip pulse handlebars Make sure to clean the pulse sensors to ensure proper contact can be maintained Machine will trip home circuit breaker Machine breaker will trip RST5 6 amp RCT 7 6 Sears Service Manual 2007 Circuit Breaker Troubleshooting Symptom Possible Cause Test Procedure Inadequate power Inadequate lubrication on deck and running belt Failed running belt Failed drive motor Failed motor control board MCB Failed circuit breaker Check for dedicated circuit 20 amp is ideal and check wall outlet voltage 120 VAC Reference Power Source Wiring Diagram p 20 Make sure machine is not on extension cord or surge protector Place hand underneath r
21. s 0 vdc c 7 vdc If one removed no issues If both removed UCB does not turn on At UCB green measures 0 46 vdc white 1 4 vdc all others 0 0 vdc Grey Speed Command 0 0 vdc b f start 0 8 vde b f start No belt movement MCB relay clicks When measuring MCB voltage PWM 0 36vde aft start 0 7 vdc aft start there is a slight belt movement then stops increases as console change as console speed increased speed increased White Drive Motor Relay 5 0 vdc b f start 1 4 vdc b f start No belt movement no click from MCB relay 0 0 vdc aft start 1 4 vdc aft start 11 Pink Incline Down 0 0 vdc b f start Up incline functions no down incline If incline then decline motor 5 0 vdc if press inclina does not move again until past incline point Ex If incline to 2 0 down then back down to 0 the motor will not move until 2 5 In Hardware Test on ly up incline value increases does not decrease 12 Light Blue Incline Up 0 0 vdc if at 0 Down incline functions no incline In Hardware Test down inclina 5 0 vdc if not at 0 functions until value at 0 no up incline Similar phenomenon to at console height cut Pink wire if incline stopped not at 0 Note All voltages taken after individual wire cut RST5 6 amp RCT 7 6 Sears Service Manual 2007 Incline Wire Function Small Connector Wire Color Before Start At 0 025 At 10 Normal Mode Results ENG 1 Test Results Blue n a Ground Constant up incline
22. speed increases as shown on console RST5 6 amp RCT 7 6 Sears Service Manual 2007 No Motor Movement Voltage Checkpoints Digital Speed Sensor Connection Procedures Using a dc volt meter if non auto ranging set for the 20vdc range test the voltage at the red wire and again at the yellow wire using the blue black or black as ground The yellow wire should be measure twice once with the optic speed sensor obstructed and once not obstruct ed This can be done by slowly turning the motor and aligning the tines or open spaces of the optic disk with the sensor Desired Results The voltage charts contain typical desired results on a fully functional system A variance from the norm would indicate a defective compo nent Checkpoint Voltage With Sensor Voltage With Sensor Not Obstructed Obstructed Yellow Digital Speed Sensor 0 3 vdc Red Digital Speed Sensor 5 0 vdc Drive Motor Connection Procedures Using a dc volt meter if non auto ranging set for the 200vdc range test the voltage at the red and black motor leads with the motor still attached Note 1 This should be tested after the console cable and speed sensor points as they can give the same results as a defective lower board Note 2 A non functional system may still have a voltage present with no motor attached For accurate results the motor must be attached when the voltage is checked Desired Results The voltage charts contain typical desired results on a fully fun
23. unning belt and feel for adequate silicone application Feel underside of running belt It should have a rough feel to it similar to denim or canvas Perform AMP draw test on motor Reference No Motor Movement Voltage Check p 21 Reference No Motor Movement Voltage Check p 21 Reference Power Source Wiring Diagram p 20 If the AC voltage is missing or incorrect check the AC service or consult an electrician Apply Silicon lubrication Reference Lubrication Procedure p 27 Replace running belt Replace drive motor Replace MCB Replace circuit breaker RST5 6 amp RCT 7 6 Sears Service Manual 2007 Engineering Mode Treadmill Engineering Menu Definition General e Hold Incline and Speed for 3 seconds e Speed navigates once entered e Enter Selects modes e Hold Stop for three seconds to exit modes e Defaults to Eng e Defaults to scrolling ENGINEERING MENU Will scroll DISPLAY TEST if navigated back to Eng0 Eng Display Test e he information portion of the display will show Eng0 e The matrix will scroll DISPLAY TEST e When selected all display segments should be on e When pressed each button will beep and have a unique display change o Stop turn all display segments off o Start turns all display segments on o If there is scrolling speed and incline the display will scroll the speed or incline when the quick keys are pressed Eng Hardware Test e The
24. wer board Replace elevation motor Recalibrate elevation motor by hand Referance Resetting the Incline Motor p 25 Replace elevation motor Replace console cable Replace elevation motor Replace upper board Replace upper board console cable and elevation motor Replace lower board Replace lower board RST5 6 amp RCT 7 6 Sears Service Manual 2007 No Motor Movement Troubleshooting Symptom Possible Cause Test Procedure No Motor Movement Upon Inadequate power pressing start console responds normally keys respond normally and elevation works but no belt movement Damaged or improper Wiring Failed motor control board MCB Failed drive motor Failed optic sensor 4 RST56 amp RCT 7 6 SERVICE MANUAL 2007_REV1 0 If the AC voltage is missing or incorrect check the AC service or consult an electrician Check for dedicated circuit 20 amp is ideal and check wall outlet voltage 120 VAC Reference Power Source Wiring Diagram p 20 Make sure machine is not on extension cord or surge protector Reference No Motor Movement Voltage Checkpoints p 21 Verify there are no pinches or Replace parts as needed cuts in the power cord power wires motor wires or console cable Verify the connections of above wires and cords Reference No Motor Movement Voltage Checkpoints p 21 Verify power to MCB Replace MCB Reference No Motor Movement Voltage
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