Service Manual
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111 Canfield Avenue • Randolph, New Jersey 07869 • 1-800-LANDICE • FAX 973-927-0630
70 SERIES SERVICE MANUAL 2007 HOME & COMMERCIAL
FOR TECHNICAL ASSISTANCE CALL 1-800-LANDICE
Part number 72078
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TABLE OF CONTENTS Reimbursement Policy Parts and Warranty Policy Landice Service Authorization (SA) form Proration Information Recommended Tools Electrical requirements Tracking & tensioning Treadmill Maintenance Treadmill Dimensions & Weight Definitions Testing Components McMillan drive motor brush replacement McMillan speed sensor replacement Parts removal Elevation Motor installation Elevation calibration Common problems Noise problems Control Panel & Features Diagnostic features access Feedback test Membrane bypass test Error code definition Self-diagnostic error definitions Anta/PWM wire schematic Anta/PWM OLS mode Anta/PWM flowchart SCR Generation 1 Lower Schematic SCR Gen. 1 flowchart SCR Generation 2 LED Configuration SCR Gen. 2 lower schematic SCR wire harness schematic Diagnostic Flow Chart – SCR 2 ESI PWM LED Configurations ESI PWM lower wiring schematic PWM wire harness schematic ESI PWM flow chart PWM 2 (ANTA) wire schematic PWM 2 (ANTA) Flowchart RTM-REV wiring schematic RTM-REV lower board diagram RTM-REV flowchart RTM-REV pot calibration Landice Vision System Med rail installs Explosion Parts List
4 5 6 7 8 9 10 13 15 18 20 23 24 25 28 29 30 33 37 40 41 42 43 44 45 46 47 51 55 59 61 62 63 67 69 70 71 75 76 80 81 82 86 87 91 92 98
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SERVICE REIMBURSEMENT POLICY: This is offered to all Landice dealers as well as all authorized Landice service providers. Landice covers our treadmills with a 1-year labor reimbursement policy. That means we will pay to fix our treadmill as long as it’s within one year from the date the treadmill was purchased. OUR POLICY: Landice will reimburse the selling dealer according to our labor rate schedule. If you are a service provider for Landice and do not sell our product, you have the option of billing us direct or you can bill the dealer that you’re providing service for. Generally, if our capped rate does not cover your labor charge you would bill the selling dealer. The current rate is $30.00 per hour and is capped at a maximum of one hour labor and one hour travel per treadmill failure. Diagnostic and return trips are not covered. Note that treadbelt tracking, treadbelt / drive belt tensioning, blown fuses, and setup procedures are not covered by this warranty. Set-Up Includes: Assembly, adjusting treadbelt and drive belt (if needed), walking the treadbelt and deck wax in, and performing any additional adjustments that may have been upset during shipping. The dealer must call for a Service Authorization (SA) number prior to performing any service to verify the treadmill is under labor warranty. It is advisable to call Landice from the treadmill location to successfully diagnose the problem. This will insure that the correct part will be shipped out the first time. Labor claim forms must be submitted within three months from the date service was performed. Labor claim forms must be completely filled out and have the Landice Service Authorization number at the top. Generally service claims are paid out upon the return of defective parts and/or crediting of the warranty invoice. If parts are outstanding for a period of more than 90 days previously submitted service claims will be returned unpaid. FLOOR MODELS AND DEALER STOCK If the dealer sells a treadmill to a customer within one year of its purchase from Landice, the warranty period will be extended to start from the date of sale to the customer. If a home treadmill is over 1 year old when sold to a customer, the treadmill will carry a 5 year parts warranty and there will be NO labor warranty. If a commercial unit is over 1 year old when sold to a customer, the treadmill will carry the remainder of the parts warranty from the date of shipment with NO labor warranty.
5 PARTS POLICY
Landice Treadmills reserves the right to request the return of any part regardless of age. A prepaid Return Tag will be provided at Landice’s discretion. All warranty parts requested to be returned will be billed to the dealer at dealer cost. Landice will credit this invoice upon receipt of defective parts. It is the dealer's responsibility to return the defective parts to Landice with a copy of the invoice or packing slip. If the defective parts are not returned within 30 days, payment of invoice is expected in full. WARRANTY PART ORDERING: When ordering parts under warranty please have the following information available. Warranty orders cannot be processed without this information: 1) Customer's name, address and phone number 2) Treadmill serial number 3) Detailed description of failure PURCHASE PART ORDERING: Serial numbers are recommended to help ensure the correct part is shipped. Purchased parts are covered by a 90 day replacement part warranty from the date the order shipped.
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111 Canfield Avenue • Randolph, New Jersey 07869 • 1-800-LANDICE • FAX 973-927-0630 SERVICE CLAIM FORM SA# DEALER INFORMATION: Service Dealer / Dealer Name: Address City Phone( Contact
)
State
Zip
State Contact
Zip
-
CUSTOMER INFORMATION Name Address City Phone( ) TREADMILL INFORMATION Model Type: Frame Serial # DCP Serial # (if applicable) Out of box problem Yes
Date of Service Date of Purchase No
CUSTOMER COMPLAINT
SERVICES PERFORMED/PARTS REPLACED
TRAVEL / LABOR: Travel Time:
Labor Time:
TOTAL TIME: _________
VALIDATION SIGNATURES Service Rep. Signature
Customer Signature
CLAIMS CAN BE MAILED, EMAILED, FAXED OR SENT IN WITH THE RETURNED DEFECTIVE PART. DO NOT SUBMIT SERVICE CLAIMS WITHOUT SERVICE AUTHORIZATION NUMBERS.
Date
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PRORATION INFORMATION
The pro-rate scale applies to wear items only on commercial treadmills. Pro-rated items include: o Drive belt o Motor brushes o Deck o Walking belt. LTD models sold after August 1, 2002 and Club models sold after January 1, 2003 are pro-rated under the 5 year scale. Wear items will get covered under full warranty for the first 6 months of ownership if they fail due to wear. Discounts will be off of Dealer cost and the Dealer is expected to pass the same discount off of retail price on to the end user Wear items are pro-rated as follows: Up to 6 months 6-12 months Year 2 Year 3 Year 4 Year 5
No Charge 80% Discount 60% Discount 50% Discount 40% Discount 30% Discount
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RECOMMENDED TOOLS FOR SERVICING LANDICE TREADMILL Deep socket set 3/8 drive with ratchet and extension: Must have 3/8, 7/16, 1 /2, 5/16, 9/16 sockets. Combination wrench set: Must have 3/8, 7/16, 1 /2, 5/16, 9/16 #1, 2, and 3 Philips head screwdriver (or electric screwdriver) #1, 2, and 3 flat head screwdriver (or electric screwdriver) Socket head cap screw wrench set/ multi Allen Wrench Rubber mallet Diagonal cutter/ dykes Wire stripper Wire crimper Digital voltmeter Note: Analog voltmeters are not recommended. Utility knife Pulse simulator tester AC Amp Meter
ELECTRICAL REQUIREMENTS FOR L-SERIES TREADMILLS 220 VAC CLUB TREADMILL
220V CLUB ELECTRICAL REQUIREMENTS: 220VAC , 60 Hz , 15 AMP - DEDICATED CIRCUIT & GROUND PLUG - NEMA 6-15P (PLUG) RECEPTACLE - NEMA 6-15R (RECEPTACLE) ABOVE IS DIAGRAM OF PLUG CONFIGURATION.
110 VAC HOME, LTD, & CLUB TREADMILL
HOME, LTD, & 110V CLUB ELECTRICAL REQUIREMENTS: 110 VAC, 60 Hz, 15 AMP - DEDICATED CIRCUIT & GROUND PLUG - NEMA 5-15P (PLUG) RECEPTACLE - NEMA 5-15R (RECEPTACLE) ABOVE IS DIAGRAM OF PLUG CONFIGURATION FOR 220V & 110V MACHINES USING 3 PHASE VOLTAGE: Each treadmill must have its own circuit breaker and be run on the same phase same power leg). If 220v power is required then all treadmills must run on the same two phases (power legs) and on their own circuit breakers.
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TRACKING AND TENSIONING Proper tensioning of the Treadbelt and Drive Belt are necessary to insure smooth operation and long life for your treadmill. As these components may stretch as part of their normal break in period it is one of the few things we ask our customers to do in maintenance of their treadmills. The following illustrates how to tension the Treadbelt and Drive Belt. Check Drive Belt tension
Drive Belts are pretension before the treadmill leaves the factory. Adjustments are ONLY necessary when Drive Belt is slipping during use. If the belt needs to be adjusted use a 7/16” socket and turn the bolt underneath the motor pan attached to the hook screw.
To test for tightness: 1. Remove motor cover. 2. With mill running at 2mph walk on treadbelt. 3. If Drive Belt is moving front roller with no slippage then drive belt is correctly tensioned. Tighten belt only until it stops slipping to insure maximum drive motor and roller life. As a starting point check the tension on the Drive Belt by placing the Drive Belt between your thumb and forefinger and twisting. The proper twist is 45°. CAUTION: NEVER OVER TENSION THE DRIVE BELT. TIGHTEN ONLY TILL SLIPPING STOPS. OVER TIGHTENING MAY CAUSE SERIOUS DAMAGE TO THE DRIVE MOTOR AND WILL VOID THE MOTOR’S WARRANTY.
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TREADBELT TENSIONING Treadbelts are tensioned at the factory and normally need no adjustment. To determine if the treadbelt needs to be adjusted perform the following test: 1. Remove motor cover. 2. Set treadmill speed to 2mph. 3. Walk on treadbelt and see if drive roller is turning but belt is not moving. If belt is not moving then tension treadbelt ONLY until belt ceases to slip. The same adjustment bolts used for tracking TENSION the Treadbelt. To tighten Treadbelt, turn both adjustment bolts (clockwise) exactly the same amount. Failure to turn them equally will affect belt tracking. You are moving the Take-Up Roller closer or further away from the deck to tension the Treadbelt. DO NOT OVER TIGHTEN TREADBELT! If you can't reach the palm of your hand under the center of the Treadbelt, if the edges of the belt are curled up, or if you hear the belt “groaning” THE TREADBELT IS TOO TIGHT. TREADBELT TRACKING The Treadbelt is TRACKED by means of two adjustment bolts (9/16" wrench) located at rear of treadmill. By tightening the side the belt is closest to and loosening the opposite side by the same amount, you change the alignment of the rear roller without changing overall tension. Adjustments should be made with treadmill running, and should be made in 1/4-turn increments. Allow at least 30 seconds for treadbelt to stabilize between each adjustment. Perform the adjustments at slower speeds (2-3 mph) until you are comfortable making adjustments. Faster speeds will cause the adjustments to take effect quicker (5-6 mph). Example: Treadbelt tracks to the right: a. Turn treadmill on, and bring speed up to 2.0 mph. b. Using a 9/16" wrench, tighten the right-hand adjustment bolt 1/4" turn. c. Loosen the left-hand adjustment bolt 1/4" turn. d. Let Treadbelt stabilize (rotate for 30 seconds) and readjust if necessary. *If normal tracking procedures are not working satisfactorily, proceed with the following steps: MAKE SURE TREADMILL IS LEVEL! Make sure the treadmill is completely level. Place a carpenter's level across rear frame rails running parallel with rear roller. VERY IMPORTANT: Must have a minimum of 150 pounds on the treadmill’s side steps for the reading to be accurate. If not level, try to move treadmill to more level flooring. If that is not an option use leveling shims. You can either put something under the rear feet or install shims between the rear foot and the frame. Simply loosen the two Philips head screws and slide shim in place. Tighten screw and re-check that the treadmill is level.
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DRIVE ROLLER ALIGNMENT: The Drive Roller is preset at the factory. However, if the Treadbelt is centered at the Rear Roller but is off center in the front, an adjustment will need to be made. This problem often appears as the belt is running diagonally (closer to one side at the top but farther away at the bottom). The Drive Roller is secured to the frame with two hex head bolts. (3/8 wrench) The holes in the frame are elongated; this allows for forward and aft adjustment of the drive roller. Example: Treadbelt is tracking to the right hand side. Adjust right hand side of drive roller by moving it towards the front (motor side) of treadmill. The Treadbelt will move towards the center.
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Recommended Maintenance Home Models- Vacuum around and underneath the treadmill on a monthly basis. Vacuum or wipe down the deck area between the treadbelt and frame. Wipe down display using mild solution of Non-Phosphate cleaner on damp soft cotton cloth and handrails after every use. No other maintenance is required. Commercial ModelsOnce a week 1. Wipe down display. Use mild solution of Non-Phosphate cleaner on damp soft cotton cloth. Once a week or as needed. 2. Wipe down handrails and traction strips with soft cotton cloth and mild soap and water. Cloth should be damp not wet. Once a week or as needed. 3. Vacuum or wipe down the Deck area between treadbelt and frame. Once a week. Once a Month 1. Take off Motor cover and vacuum. 2. Slide clean towel under Treadbelt and wipe deck and under the belt. Rotate belt 180 degrees and repeat. 3. Apply Slipcoat, the only lubricant recommended by Landice, under the Treadbelt if it feels dry (non oily). 4. Check Drive Belt Tension 5. Check Treadbelt Tension and Tracking Every Six Months 1. Check Motor Brushes for wear. Clean commutator if needed. Cleaning Treadbelt Walking Surface- Treadbelts should be vacuumed to remove loose dirt. If vacuuming doesn’t remove dirt, we recommend the use of a medium stiff nylon bristle brush to remove dirt trapped in treadbelt surface. A damp (not wet!) sponge can be used to finish the cleaning process.
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Commercial Treadmill Maintenance Checklist
Check treadbelt tension and tracking Wipe underneath treadbelt Check drive belt tension Check motor brushes Use cleaning stone to clean commutator Vacuum under motor hood Vacuum around and under treadmill Lubricate deck with slipcoat if needed Wipe down display with soft cotton & mild soap and water.
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Treadmill Dimensions (boxed) L x W x H (as loaded in trailer)
L770
36” x
19” x
82”
Weight 350 lbs
L870
36” x
90” x
31”
Weight 435 lbs
L970
36” x
90” x
31”
Weight 460 lbs
L770
no box or pallet
Weight 290 lbs
L870
no box or pallet
Weight 330 lbs
L970
no box or pallet
Weight 335 lbs
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770 SERIES FACTS:
Treadbelt Dimension Width: 20 inches Length 58 inches Circumference: 122 inches Deck Dimension 1 inch thick wood Phenolic layer – Reversible Width: 52.2 inches Length: 24 1/2 inches L760: Production Date for Frames: July 17, 2003 Starting serial number for Frames: L7-31084 Production Date complete L760 series: October 2, 2003 Starting serial number for complete L760 series: L7-32002 *NOTE: Some L750 series treadmills were manufactured after the date and serial number unit January 1, 2004. L770: Production Date: November 11, 2006 Starting serial number: L7-64947 *NOTE: Some L760 series treadmills were manufactured after the date and serial number. The L760’s and L770’s series decks are interchangeable The L760’s and L770’s series walking belts are interchangeable.
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870/970 SERIES FACTS: (All components are the same for the L8 and L9, except for the L9’s larger feet)
L8
L9
Treadbelt Dimension: Length: 63 inches Width: 21.5 inches Total Circumference: 136 inches Deck Dimension: 1 inch thick wood Phenolic layer – Reversible Length: 56 inches Width: 25 inches L8622: Production Date: September 24, 2004 Starting serial number for the treadmill: L8-10380 L9622: Production Date: September 24, 2004 Starting serial number for the treadmill L9-03329 L870: Production Date: November 10, 2006 Starting Serial number for the treadmill: L8-14596 L970: Production Date November 3, 2006 Starting Serial number for the treadmill L9-5020 *NOTE: Some L8622 series treadmills were manufactured after the date and serial number. The L8622’s and L870’s series decks are interchangeable The L8622’s and L870’s series walking belts are interchangeable. The L8622’s and L870’s series drive and rear rollers are interchangeable. L850’s & L860‘s front and rear rollers are different from current production rollers.
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DEFINITIONS OF COMPONENTS ANTA PWM COMBO BOARD: This Control Board is a combination of the PWM (Pulse Width Modulation), relay board, and DC Transformer. This is also known as a combo board and used in home setting. Delivers power to the upper board, elevation motor, and drive motor.
CAPACITOR Stores energy to smooth out voltage to Drive Motor. Used with SCR Motor Control Boards . CHOKE (Inductor) Acts like a filter to smooth out voltage to Drive Motor. Used with SCR Motor Control Boards. DCP (DISPLAY CONTROL PACKAGE) Package containing all of the components relative to the Upper Display Console. This includes the membrane/faceplate, upper display board, & wire harness. DCP’s also include owner’s manuals, warranty cards, and cardio pulse transmitter strap (if applicable). DCP’s are for HOME TREADMILLS ONLY and are rarely a warranty part.
DIAGNOSTIC MODE The test mode that allows access button feedback, potentiometer calibration, speed control (PST, CT, & ET), total hours and miles, and pulse reading. DRIVE BELT This connects the Drive Motor to Sheave (Pulley) on Drive Roller. DRIVE MOTOR Provides power to Drive Belt to turn Pulley on Drive Roller to move Treadbelt. This gets its power from the PWM or SCR. Landice Drive Motors are either 110v for 220v.
DRIVE ROLLER W/ SHEAVE This is the Roller at the front of the Treadmill. The Sheave (pulley) is pressed onto the roller and allows transfer of movement from Drive Belt to Treadbelt.
ELEVATION LEG ASSEMBLY Connects to Elevation Motor to allow movement of front of treadmill up or down.
ELEVATION MOTOR This motor works through the elevation leg assembly to raise or lower the front of the treadmill. It gets its power from the Combo Board on Home models and from the SCR on LTD and Club models.
ELEVATION POTENTIOMETER Attaches to Elevation Motor and gives feedback to Upper Display as to what incline the treadmill is at. Needs to be calibrated whenever elevation motor is replaced. A Potentiometer should be checked whenever there is a problem with elevation or when the Error Code “PO” comes up.
ESI PWM COMBO BOARD This Control Board is a combination of the PWM (Pulse Width Modulation), relay board, and DC Transformer. This is also known as a combo board and used in home setting. Delivers power to the upper board, elevation motor, and drive motor.
FACEPLATE This overlay is found on our Sports Trainer and RTM models and is screwed onto the Upper Display Board.
19 FRAMES (SIDE) One on either side, these connect with the Deck Slats to form the frame of the machine. FRAME COVERS (SIDE) These sit on top of the Frame Rails and keep Deck in place. They also form the base for the Traction Strip. IR POTENTIOMETER The IR Pot is located on the Combo Control Board and is used to adjust the time it takes the PWM to react to a load or amperage spike. It normally requires adjustment if the motor feels like it’s surging or lacking torque. MEMBRANE PANEL This takes information from the display membrane keys and transmits it to Upper Display Board via the ribbon cable. It is found on the PST3, CT2, and ET2 models.
OPEN LOOP SPEED (O.L.S.) MODE The test mode which remove the speed sensor from equation of running treadmill. This mode will give access to speed feedback and control the speed of the treadmill on a running unit. NOTE: RTM & ST has a separate command for entering into O.L.S. SAFETY LANYARD This is a safety feature that completes a switch in the Display Board. If it is not connected the treadmill will display a “SAFE” message. Works with the stud and flux guide. SCR (Silicon Controlled Rectifier) Control Boards-Used in LTD (110v) and Club Models (220v) This circuit board is designed to run the drive motor, elevation relays, the belt relay, DC transformer for power to Upper Display Board, and on board diagnostic lights. The SCR requires a Capacitor and Choke to provide “clean” power to the Drive Motor SPEED SENSOR Landice uses a magnetic speed sensor (Baldor motors) or optical speed sensor (McMillan Motors) to receive accurate speed readings. Readings are taken directly from the flywheel on the motor and sent to the Combo Board or SCR. TAKE UP ROLLER This is the Roller at the rear of the treadmill. It completes the loop for Treadbelt movement and allows tracking and tension adjustment of Treadbelt. TREADBELT This is the surface the user walks on. It rides over the deck and rollers. UPPER DISPLAY BOARD This controls information from the Membrane panel or Faceplate. It then transmits it to the Combo board on Home models and the SCR on Club or LTD models. UPRIGHTS One on either side, these hold the wire harness, the upper display, the cross member, and the handrails.
UPPER WIRE HARNESS Transmits data from lower electronics to upper electronics.
VFX SYSTEM Shock-absorbing Deck. Consists of wood Deck, VFX Deck Post, Deck Spacer, Deck Load Washer, Deck Felt Washer, and Deck Impact Absorber.
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TESTING COMPONENTS MOTOR COMPONENTS DRIVE MOTOR:
Generation Test – all Landice drive motors (110 & 220) are direct current or DC. A DC drive motor can produce (generate) a DC voltage when it’s manually rotated. The DC output is linear to the speed the motor is rotated. To perform the “Generation Test” follow these steps: 1. Un-plug treadmill from wall outlet. 2. Disconnect drive motor from motor control board. 3. Connect DMM (Digital Multi-Meter) to the drive motor wires. Note: Your DMM should be set on Volts DC (VDC) Motor plus (+) = Red test lead from DMM Motor minus(-) = Black test lead DMM 4. Position your DMM so you can read it while standing on the treadbelt. 5. Start to push / run on the treadbelt. Note: You are spinning the drive motor manually. The faster you spin the motor, the higher the output of DC voltage will register on your DMM.
110 VAC treadmills use a 90 VDC drive motor. For every mile per hour you spin the drive motor you will generate approximately 10 VDC output. So, at 1 mph you will measure 10VDC +/- and at 9mph you will measure 90VDC +/-. 220 VAC treadmills use a 180 VDC drive motor (double the input voltage, double the size of the drive motor). For every mile per hour (mph) you spin the drive motor you will generate approximately 20 VDC output. So, at 1.0mph you will measure 20 VDC +/- and at 9.0mph you will measure 180 VDC +/-. If you measure very low DC voltage or zero DC voltage, first check the drive motor brushes for condition. Motor brushes are the leading cause for drive motor failure. If the motor brushes are worn below 3/8” in length, replace them. (90VDC Motor Brush part#70222, 180 VDC Motor Brush part#70223) Alternate Test 1: Attach 9 or 12 volt battery to motor leads. There should be motor movement. Alternate Test 2: Unplug Treadmill. Disconnect Drive Motor wires. Disconnect Drive Belt. Hold black and white wires together. Spin flywheel. There should be resistance when wires are connected. ELEVATION MOTOR Using your voltmeter measure the input voltage (AC) to the elevation motor. Secure the black (negative) meter probe to a good chassis ground. Place the red meter probe on the RED wire in the elevation harness. Press the elevation DOWN key and you should get 120 /220VAC. Place the red meter probe on the BLACK wire in the elevation harness. Press the elevation UP key and you should get 120/220VAC. If the elevation motor is getting the proper AC voltage in but does not turn, replace it.
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ELEVATION POTENTIOMETER Remove the elevation pot from elevation motor but do not disconnect the brown, orange and blue wires. Using a digital voltmeter set to ohms (Ω), place meter probes on the pot prongs with the (orange) and (brown) wires. You are measuring resistance so you do not need to observe polarity. - Turn pot shaft completely clockwise (0-1000Ω). - Turn pot shaft completely counterclockwise (1000-0Ω). Now place meter probes on prongs (orange) and (blue) wires. - Turn shaft of the potentiometer completely clockwise (1000-0Ω). - Turn pot shaft completely counterclockwise (0-1000Ω) If the elevation potentiometer does not indicate the proper resistance readings, it is must be replaced. Note: Potentiometer should fit snugly into motor. Check for tight fit. Also check that nut on Potentiometer is tight. MOTOR CONTROL COMPONENTS PWM MOTOR CONTROL The PWM board runs on AC voltage. The AC voltage is delivered to the PWM board across two input terminals marked L1 and L2. Confirm AC voltage into the PWM by measuring across these terminals with your voltmeter. You should measure 120/220VAC input. The DC voltage comes out of the PWM board (going to the drive motor) across two output terminals marked A+ and A-. Power up treadmill in Open Loop Speed OLS mode and bring to maximum speed. Confirm DC voltage out by measuring across these two terminals with your voltmeter. You should measure 90/180VDC output. If the PWM board is getting the proper AC voltage in but does not supply any DC voltage out, it must be replaced. (This holds true as long as proper speed reference voltage is being supplied from relay board to PWM across the V+, P1, & P2 terminals. SEE PAGE 45) SCR MOTOR CONTROL The SCR board runs on AC voltage. The AC voltage is delivered to the SCR board across two input terminals marked HOT and NEUT. Power up treadmill in Open Loop Speed (OLS) mode (see Page 56) and bring displayed speed to the max. Confirm AC voltage into the SCR board by measuring across these terminals with your voltmeter. You should measure 120/220VAC across these terminals. The DC voltage comes out of the SCR board (going to the drive motor) across two output terminals marked MTR+ and MTR-. Confirm DC voltage out by measuring across these two terminals with your voltmeter. You should measure 90/180VDC output. If the SCR board is getting the proper AC voltage in but does not supply any DC voltage out, it must be replaced.