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Table of Contents
Troubleshooting
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Summary of Contents for Skytron 3501B EZ SLIDE
- Page 1 SURGICAL TABLE MAINTENANCE MANUAL MODEL 3501B EZ SLIDE 1/07...
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Page 3: Table Of Contents
3-11. BRAKE CIRCUIT DIAGNOSIS CHART ..................28 3-12. Flexible Hose Identification and Placement ................29 3-13. Kidney Lift System ........................30 1/07 Although current at the time of publication, SKYTRON'S policy of continuous development makes this manual subject to change without notice. - Page 4 Page 2 TABLE OF CONTENTS (continued) Title Page SECTION IV ELECTRICAL SYSTEM ....................32 4-1. General ............................32 4-2. Components ..........................32 SECTION V ELECTRICAL TROUBLESHOOTING ................34 5-1. General ............................34 5-2. Troubleshooting Notes ........................ 34 5-3. Main Switch ..........................34 5-4.
- Page 5 • Inspect the Trendelenburg Cylinder & Ball Joint Retainer Nut Only facility-authorized Skytron trained, maintenance personnel should troubleshoot the Skytron 3501B EZ SLIDE Surgical Table. Trouble shooting by unauthorized personnel could result n personal injury or equipment damage. How to contact us: SKYTRON 5000 36th St.
- Page 6 Page 4 3501B EZ SLIDE EQUIPMENT LABELS D6-032-46 D6-032-47 WARNING WARNING DO NOT SIT ON END OF LEG SECTION(S) AS LOADS USE HEAD SECTION AS FOOT EXTENSION IN EXCESS OF 140 LBS, MAY CAUSE INSTABILITY ONLY - WHEN REVERSING PATIENT ON TABLE THAT COULD CAUSE THE TABLE TO BE TIPPED OVER.
- Page 7 Page 5 3501B EZ Slide General Purpose Surgical Table Specifications 14-1/2" 12-1/2" 18-1/4" 25" 23" 14-1/2" 19-3/4" TOP VIEW 83" 60˚ 5-1/2" 21-3/4" 3" 90˚ 45" MAX 26" MIN 6" 8-1/2" 19" 40-1/2" SIDE VIEW END VIEW ENTELA CERTIFIED TO UL2601-1 CAN/CSA601.1, IEC 60601-2-46...
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Page 8: Section I Hydraulic System
Page 6 SECTION I HYDRAULIC SYSTEM 1-1. General c. Pressure Relief Valve - Provides an alternate oil The hydraulic system (with the exception of the path when the hydraulic cylinders reach the end of hydraulic cylinders and hoses) is contained within the their stroke. -
Page 9: Component Operation
Page 7 1-2. Component Operation The main component of the valve is an adjustable a. Motor/Pump Operation spring loaded plunger that when it is pushed off from its seat by the oil pressure the oil then flows The motor/pump assembly is a gear type pump back into the reservoir. -
Page 10: Mini-Valves
Page 8 c. Mini-Valves The operation of the mini-valves is identical for all the return oil. If the pump puts out more volume to a slave cylinder than is allowed by the speed table functions except the elevation and brake circuits. - Page 11 Page 9 Mini-Valve Left Port Activated Mini-Valve Right Port Activated (See figure 1-7.) (See figure 1-6) Left Mini-Valve Port is Supply Line Right Mini-Valve Port is Supply Line Right Mini-Valve Port is Return Line Left Mini-Valve Port is Return Line INLET OUTLET OUTLET...
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Page 12: Hydraulic Cylinders (Slave Cylinders)
Page 10 d. Hydraulic Cylinders (Slave Cylinders) There are several different types of hydraulic cylin- When hydraulic fluid is pumped into one side of the ders used in the table that activate the control cylinder, the pistons are pushed in one direction, functions. - Page 13 Page 11 4. Elevation Cylinder - This single action cylin- der does not have hydraulic fluid on both sides of the piston. It depends on the weight of the table top assembly to lower it. The cylinder is set in the center of the elevation main column.
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Page 14: Elevation Cylinder Return Circuit
Page 12 e. Elevation Cylinder Return Circuit 3. Manually controlled emergency brake re- A three-way (single check valve type) mini-valve lease. controls both the elevation and return circuits. The elevation circuit operation within the mini-valve is 4. Plumbing terminal, flexible hoses, copper identical to the operation of the four-way valves lines and "O"... -
Page 15: Emergency Brake Release
Page 13 h. Flex/Reflex System The Flex/Reflex system incorporates an additional When activated, the return hydraulic circuit oper- ates similar to the elevation cylinder return circuit. mini-valve which connects the Trendelenburg and back section hydraulic systems in a series. When Return springs inside the single action brake cylin- FLEX is activated by the pendant control, the Flex/ ders retract the brake pads and provide the pres-... -
Page 16: Hydraulic Adjustments
Page 14 1-3. Hydraulic Adjustments NOTE a. Fluid Level. Whenever a hydraulic line or compo- The fluid level should be approximately 1/2" below nent is replaced, bleed the air out of the the filler hole or gasket surface. If additional fluid is lines using the pump pressure by acti- needed, remove the filler vent cap with a phillips vating the function before making the... -
Page 17: Speed Controls
Page 15 Any control function should move in either direc- d. Speed Controls tion at the same rate. If the rate of a certain function is too slow, open the speed control slightly and The speed controls restrict the volume of oil return- recheck. -
Page 18: Section Ii Mechanical Table Adjustments
Page 16 SECTION II MECHANICAL TABLE ADJUSTMENTS 2-1. Back Section Gear Mesh Adjustment The gear mesh is adjusted by the use of an eccen- Any twisting or flexing of the back section as it tric cam. This cam moves the gear teeth closer approaches the stalled position indicates that one together to eliminate gear lash. -
Page 19: Trendelenburg Cylinder Ball Joint
Page 17 To adjust: d. Slide and Kidney Lift Cylinders Loosen the cam locking set screws located inside If the Slide or Kidney Lift cylinder has been re- the table side frames. See figure 2-3. Use an allen moved, the distance from the end of the piston to wrench to turn the cylinder eccentric cams as the end of the cylinder housing must be checked to required to shift either cylinder fore or aft as needed... -
Page 20: Slide Roller Adjustment
Page 18 SLIDE SET SCREW ROLLER ADJUSTMENT SET SCREW ALLEN BOLT ALLEN ALLEN WRENCH BOLTS 82206-205 82206-206 Figure 2-6. Head Section Adjustment Figure 2-7. 2-4. Slide Roller Adjustment 2-5. Side Rails The pivot pins on the slide rollers are eccentric Inspect each of the side rail sections. -
Page 21: Section Iii Hydraulic Troubleshooting
Page 19 SECTION III HYDRAULIC TROUBLESHOOTING 3-1. Precautions Before attempting to troubleshoot any hydraulic Once the problem has been determined, concen- problem on the table, please read through the pre- trate on that particular hydraulic circuit or control cautions and notes below. function. -
Page 22: Elevation Diagnosis Chart
Page 20 3-3. ELEVATION DIAGNOSIS CHART Problem Reason Table will not elevate properly Pressure Relief Valve Not Set Properly Low on Oil Spool Valve Not Centered Defective Pump Defective Mini-Valve Defective Solenoid or Wiring Defective Relay Box or Pendant Control Leaking Cylinder Hose Uneven Weight Distribution Table will not descend properly... -
Page 23: Trendelenburg Diagnosis Chart
Page 21 3-4. TRENDELENBURG DIAGNOSIS CHART Reason Problem Incorrect Speed Adjustment Trendelenburg function moves improperly Spool Valve Not Centered Defective Check Valves Low on Oil Pinched Hose Defective Mini-Valve Pressure Relief Valve Not Set Properly Defective Solenoid or Wiring Defective Relay Box or Pendant Control Worn Ball Joint or Retainer Nut Defective or Dirty Check Valve Trendelenburg function chatters or loses position... -
Page 24: Lateral Tilt Diagnosis Chart
Page 22 3-5. LATERAL TILT DIAGNOSIS CHART Problem Reason Lateral tilt function moves improperly Incorrect Speed Adjustment Spool Valve Not Centered Defective Check Valves Low on Oil Pinched Hose Defective Mini-Valve Pressure Relief Valve Not Set Properly Defective Solenoid Defective Relay Box or Pendant Control Lateral tilt function chatters or loses position Defective or Dirty Check Valves Oil Leakage in Circuit... -
Page 25: Flex System Diagnosis Chart
Page 23 3-6. FLEX SYSTEM DIAGNOSIS CHART Problem Reason Back Section or Trendelenburg function moves Incorrect Speed Adjustment (Trendelenburg, Back improperly section or Flex - check with gauge) Spool Valve Not Centered Defective Check Valves NOTE Low on Oil Pinched Hose If Flex System does not function prop- Defective Mini-Valve erly,... -
Page 26: Back Section Diagnosis Chart
Page 24 3-7. BACK SECTION DIAGNOSIS CHART Problem Reason Incorrect Speed Adjustment Back Section function moves improperly Spool Valve Not Centered Defective Check Valves Low on Oil Pinched Hose Defective Mini-Valve Pressure Relief Valve Not Set Properly Defective Solenoid Defective Relay Box or Pendant Control Kidney Bridge Raised Loose Retaining Hardware Microswitch out of adjustment... -
Page 27: Leg Section Diagnosis Chart
Page 25 3-8. LEG SECTION DIAGNOSIS CHART Problem Reason Leg function moves improperly Incorrect Speed Adjustment Spool Valve Not Centered Defective Check Valves Low on Oil Pinched Hose Defective Mini-Valve Pressure Relief Valve Not Set Properly Defective Solenoid Defective Relay Box or Pendant Control Loose Retaining Hardware Microswitch out of adjustment Loose Table Top... -
Page 28: Slide Diagnosis Chart
Page 26 3-9. SLIDE DIAGNOSIS CHART Reason Problem Incorrect Speed Adjustment Slide function moves improperly Spool Valve Not Centered Defective Check Valve Low on Oil Pinched Hose Defective Mini-Valve Pressure Relief Valve Not Set Properly Defective Solenoid Defective Relay Box or Pendant Control Loose Retaining Hardware Microswitch out of adjustment Loose Table Top... -
Page 29: Kidney Lift Diagnosis Chart
Page 27 3-10. KIDNEY LIFT DIAGNOSIS CHART Problem Reason Kidney Lift moves improperly Incorrect Speed Adjustment Spool Valve Not Centered Defective Check Valve Low on Oil Pinched Hose Defective Mini-Valve Pressure Relief Valve Not Set Properly Defective Solenoid Defective Relay Box or Pendant Control Bypass Valve out of Adjustment Kidney Lift chatters or loses position Defective or Dirty Check Valve... -
Page 30: Brake Circuit Diagnosis Chart
Page 28 3-11. BRAKE CIRCUIT DIAGNOSIS CHART Problem Reason Brakes will not set properly Emergency Brake Release Valve Open or Defec- tive Spool Valve Not Centered NOTE Defective Check Valve Low on Oil If brakes have been released with the Pressure Relief Valve Not Set Properly Emergency Brake Release Valve, brakes will not reset until BRAKE UN-... -
Page 31: Flexible Hose Identification And Placement
Page 29 3-12. Flexible Hose Identification and Placement hoses from the plumbing terminal to their respec- tive hydraulic cylinders. Figure 3-10 shows the The flexible hydraulic hoses used in the table are correct placement of the flexible hydraulic hoses number coded to aid in the correct placement of the and their respective number codes. -
Page 32: Kidney Lift System
Page 30 3-13. Kidney Lift System The Kidney Lift cylinders are connected in series so 3. Open the bypass valve by loosening the that both cylinders operate simultaneously. screw in the bottom of the valve and activate Hydraulic pressure on one side of the lead piston "KIDNEY UP". - Page 33 Page 31 b. Cylinder Adjustment If either of the kidney lift cylinders reaches the end 4. Leave the bypass valve open and activate of the down stroke before the other one, an adjust- "KIDNEY DOWN". Hydraulic pressure keeps the ment is needed. Use the following procedure to piston in chamber "C", the hydraulic fluid passes adjust the system.
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Page 34: Section Iv Electrical System
Page 32 SECTION IV ELECTRICAL SYSTEM 4-1. General 4-2. Components The complete electrical system (with the excep- Refer to figure 4-1 for the relationship of the elec- tion of the hand-held pendant control and the return trical components. circuit micro-switches) is contained within the base of the table. - Page 35 Page 33 PENDANT SOLENOID COILS 24VDC CONTROL MINI-VALVES CN1B RELAY BOX CN1A TRANSFORMER CN11 CN10 PUMP BATTERIES CIRCUIT BREAKER CAPACITOR/ RECTIFIER BOX BUZZER BASE CONNECTOR BATTERY FOOT MAIN INDICATOR CONTROL POWER CONNECTOR SWITCH 82206.401 TWIST-LOCK POWER CORD Figure 4-1. 3501B Electrical Circuit Block Diagram...
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Page 36: Section V Electrical Troubleshooting
Page 34 SECTION V ELECTRICAL TROUBLESHOOTING 5-1. General 5-3. Main Switch The main power supply, 120 VAC, 60 HZ, comes The battery table components operate on 24VDC. The internal charging system also incorporates the in through the power cord and through the components to transform the 120VAC input to Power Switch. -
Page 37: Batteries
Page 35 b. Test Results a. Battery System Test If the correct voltage is obtained, everything is 1. Disconnect the main power cord and using good up to this point and the problem would have a DC voltmeter, test each individual battery at its to be in another area. -
Page 38: Capacitor / Rectifier / Ac120V Transformer
Page 36 5-5. Capacitor / Rectifier / AC120V Transformer c. Capacitor / Rectifier Unit Test The Capacitor / Rectifier Unit contains the battery charging system as well as the components for 1. Make sure all connectors are connected, AC120V operation (except the transformer). connect the power cord and turn AC120V operation ON. -
Page 39: Pendant Control
Page 37 d. Test Results If you do not receive the correct readings, the connectors, wires, or the Capacitor/Rectifier Unit may be defective. NOTE Normal charging time for a fully dis- charged battery is approximately 8 hours. 82206-506 e. Charging Indicator Test Figure 5-6 Charging Indicator contains 10 LEDs, 3 red, 4 yellow and 3 green. - Page 40 If you do not receive the correct readings, the Pendant Control or the Relay Box. Contact wiring or connector pins may be faulty. SKYTRON if all tests performed indicate that the problem is located in the Pendant Control.
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Page 41: Auxiliary Switches
Page 39 5-7. Auxiliary Switches b. Test Results The following tests will determine if the auxiliary If proper meter readings are not received, test the switches are functioning properly. individual switches as necessary. Using an ohmme- ter, test the operation of an individual switch with the a. -
Page 42: Relay Box
Page 40 5-8. Relay Box BATTERY MODE TEST (main power OFF) The power supply is directly connected to the relay contacts. When these contacts are closed, 24 volts is supplied to the solenoids which are mounted on the hydraulic mini-valves. One relay is used to 1-RED (+) supply power to the pump/motor and is always 2-BLUE (-) - Page 43 Checking Output to Pendant Control The output to the Pendant Control can not be tested without specialized equipment. If all tests have been conducted and it appears that the Relay Box is faulty, contact SKYTRON.
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Page 44: Main Wire Harness Continuity Tests
Page 42 5-9. Main Wire Harness Continuity Tests If correct meter readings are not received in tests between components, before replacing the com- ponents, test the Main Wire Harness to be sure all connectors and wires are making a good connec- tion. -
Page 45: Solenoids
Page 43 5-10. Solenoids 1. Disconnect connectors CN1A and CN1B. Measure the resistance between the two pins at The solenoids are energized by 24 volt potential the connector for the solenoid in question as shown that is controlled by the relay box. The solenoid in figure 5-17. -
Page 46: Motor/Pump Assembly
Page 44 1. Turn OFF both BATTERY and AC120V NOTE operating modes. Whenever there are several compo- nents of the same type, a defective 2. Use an ohmmeter to test for continuity unit can also be detected by substi- between terminals 3 and 4 on the connector HN4. tuting a known good unit or wire con- See figure 5-19. -
Page 47: Return-To-Level / Positioning Inhibit Micro-Switches
Page 45 toward the head end. Likewise, if the top is slid 5-12. Return-to-Level / Positioning Inhibit Micro-Switches. toward the foot end, the back section will not go below horizontal. If the top is slid toward the head The return-to-level feature is activated by a single end, the leg section will not go more than 45°... -
Page 48: Micro-Switch Troubleshooting
Page 46 5-13. Micro-Switch Troubleshooting All of the micro-switches are connected to the relay If a problem is suspected in the return / positioning box via a wiring harness and the micro-switch riser circuits, disconnect the connector CN10 from the cord using connectors CN10, HN10, HN11 and Relay Box to eliminate the circuits. - Page 49 Page 47 a. Switch Test Turn Main Power ON, lock the table brakes, and NOTE place the table top sections in a level position with the Kidney Lift down. Disconnect connector CN10 If you do not receive the proper continu- from the relay box and using an ohmmeter, test the ity results at connector CN10 it does not wiring and switch operation at the appropriate pin...
- Page 50 Page 48 NS-4 NS-3 (CN10) TM1-3 YELLOW YELLOW LIGHT BLUE TM1-5 LIGHT BLUE GREEN TM1-4 GREEN NS-3 LATERAL TILT-LEFT NS-4 LATERAL TILT-RIGHT TEST AT PINS 3 & 23 TEST AT PINS 4 & 23 Table Position Switch Position Meter Reading Table Position Switch Position Meter Reading...
- Page 51 Page 49 NS-7 (CN10) PURPLE TM2-8 PURPLE BROWN TM2-1 BROWN NC N0 NS-7 LEG SECTION DOWN TEST AT PINS 7 & 26 Table Position Switch Position Meter Reading Level Open Infinity Leg-Down Closed When the Leg Section is Down, 82306-525 NS-7 brings the Leg Section Up to level.
- Page 52 Page 50 (CN10) ORANGE TM2-5 ORANGE CS-3 PURPLE TM2-8 PURPLE CS-3 BACK-UP INHIBIT TEST AT PINS 11 & 26 Table Position Switch Position Meter Reading Kidney Lift-Down Open Infinity Kidney Lift-Up Closed When Kidney Lift is Up, CS-3 will not allow Back Section to go more than 45º...
- Page 53 Page 51 (CN10) ORANGE/WHITE TM2-6 ORANGE/WHITE CS-5 PINK TM1-8 PINK CS-5 KIDNEY LIFT INHIBIT TEST AT PINS 12 & 24 Table Position Switch Position Meter Reading Back-Up < 45º Open Infinity Back-Up > 45º Closed When the Back Section is more than 45º above horizontal, CS-5 will not allow Kidney Lift to operate.
- Page 56 5000 36th Street S.E. • Grand Rapids, MI 49512 1.800.SKYTRON • 1.616.957.0500 • FAX 1.616.957.5053...
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