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dec Dental Chair

1. ALL INDIVIDUAL RESISTOR VALUES ARE IN OHMS 1 4 WATT 5 TOLERANCE 1 1 l 1 A 1 1 U6 MC34064 1 Ci 40 1 10 1 1 RN3 ye i 1 45V m 1 45V 37 1 HE 4 1 i NMC9306N C2 5 36 2 1 20 99 7733 Re Sk 5V n 1 1 45V 12K 6 z 35 4 po 8 1 1 10 7 34 3p 5 324v 1 1 swi 45V l v 19 4 B m 77 1 1 J11P1 STORE 1 fe ti 9 9 T 32 38 af 1 13 7 10 Q 31 6 1 B2 02 24V 2 lt TT E1E2 1 ale 15 5 n z 30 aj 5 ue m ULN2061M 17 3 12 J 14 6 13 3 28 77 Ki 6 5 lt A MOTOR o a 27 6 lt 16 4 14 2 15 26 BS UP SOL x 7 18 3 lt 1 T D7 H MBD701 m K5 120V ale e 8 16 25 55 at 1N4148 BS UP 9 lt U4 17 24 MBD701 t SN74LS244N 18 23 A BS DN SOL FOOT lt Bi Ki 120V SWITCH m 1 22 pa 1N4148 BS DN e 1 Ku IN FOR di ELM T 1 Yi 2 MOTOR DLY N o e pi s T 4 NO 1 BS DN Ui 03 9 Ti 4 n 1N4148 SS BKUP 5 4 4 COL2 1 1 E 2 1 BK DN SOL Ti PRE POS 120V Ti 8 04 BICON 9 L
2. 1 45V 1 1 1 Us 1 l MC34064 40 1 3 1 1 RN3 m 1 45V 38 1 DER 1 37 us 1 1 mm NMC9306N n 1 0 01 7 45V 20 12K 8 1 5V 35 po 1 24V 1 34 3 5 1 sw 77 69 asv 2 6 DI V 5 2 33 thes 1 J1 1 1 STORE 1 lt 1 11 9 9 6 32 B1 1 13 z 10 cal 424V 1 15 5 1 sjef u2 lt T ULN2061M Po Jo 8 lt 17 3 12 Am 29 2 o 28 Ki 8 lt 14 6 13 MOTOR A E 16 4 14 27 1 lt t m P10 310 5 7 18 2 15 zm 26 e BS yo sou 2 v A m m 07 V MBD701 Di K5 BS UP 8 2 De Q1 1N4148 n 4 9 04 17 24 MBD701 lt SN74LS244N 18 BSDNSOLL 4 10 lt 2 lt FOOT i lt i YA 240V SWITCH n pou 1N4148 BSDN i f lt 1 lt 4 IN FOR T TITS 2 Sekou MOTOR BLY 20 1 3 BS UP 4 paet lt lt BUE SoL 4 11 BS DN 64 4 Ut D3 K3 1 Il 1N4148 52 BK UP Ti 20012 oo l 1 lt 30 Ti PRE POS 1 T 240V T 8 lt 1 D4 K2 1 evrevexr g 1N4148 BKDN to 2N6427 T T 5 lt 11 e8SUP SOM 1 4 PLACES 4 1 1 12 5 45V RNI n 2504 1K pulum 14 8 lt e 1
3. ALL INDIVIDUAL RESISTOR VALUES ARE IN OHMS 1 4 WATT 5 TOLERANCE 5 2 1 1 AIR ELECTRIC SWITCH HANDPIECE LOCKOUT 1 U6 1 1 MC34064 1 3 10 1 RN3 E 45V 5 1 te 1 1 7 1 NMC9306N 1 2 LI 1 20 90 SK 45V LL 2 3 4 5 1 z 4 8 10 3 5 24V 1 77 o DI y 19 8 gt tN 77 1 Ji STORE amen a 1 fe 11 9 9 Bt ei 13 7 10 6 7 B2 c2 24 2 lt T o E1E2 lt 4 15 5 2 5 8 u2 ULN2061M 2 lt 17 3 12 m 8 s 8 5 lt t r MOTOR x E 16 4 14 a E zl NIE 2 15 m 3 lt BS UP SOL 2 5 E 07 MBD701 Di NUS 8 lt a 1N4148 Y UA 17 MBD701 f SN74LS244N 77 v lt 18 N x lt BSDNSOLL 4 FOOT 06 D2 JOU SWITCH 515 MBD701 Q2 1N4148 BS DN fi BK UP IN FOR 4 T gt 114 1 MOTOR DLY A Ti Dol 2 4 LK1 11 BS UP 4 lt UP SOL 4 1 Ses DN Us aN 100V m 41 lt 1 1 1N4148 BK UP 1 5 4 1 5V 1 20012 Donte un 1 COL 1 E RNG Tt 7 lt 1 10K 116 BKDNSOLL 4 T 1 8 ERE POS Bi Ka 100V GT E ENTRY EXH 1N4148 BK DN 7 Ses DN
4. RELAYS 15 54 e SOLENOIDS FUSE 5 0 lt lt POWER PRIMARY X amp GND FUSE i VOLTAGE 424V STEP DOWN 45V FILTER TRANSFORMER REGULATOR AND RECTIFIERS 080099 45V L Figure 2 4 Power Supply Footswitches The controller constantly checks the footswitch for a closed switch A closed switch causes the controller to perform that switch function The dental chair test points are checked at the same time as the footswitch a shorted pair of test points will have the same effect as a switch being closed in the footswitch The footswitch has no adjustments For testing procedures refer to Page 3 1 Back and Base Positioning Potentiometers The back and base positioning potentiometers pots perform two tasks for the controller 1 Provide the controller with a voltage level repre senting the current position of the chair base and back The voltage level is stored by the controller for later reference during auto positioning 2 Tell the controller where the chair base and back are currently positioned The controller compares the current voltage level to the voltage level stored during auto positioning programming The base positioning pot is gear driven by movement of the chair lift arm The back positioning pot is driven by movement of the chair back see Figure 2 5 For testing or adjustment procedures refer to Page 3 1
5. 4 1 Chair Headrest Positioning B 4 Headrest Glidebar Tension Wedge B 1 Headrest Knob pt B 3 Lumbar Support pp B 1 Limit Switches 2 2 5 6 3 2 18 19 20 25 4 3 5 13 3 Manifold Assembly 2 2 5 7 Mechanical Stop Added to Chair Back B 4 Month and Year Manufactured 1 2 Multi Function Footswitch pp 2 1 5 New Upholstery Material B 5 2 dya 3 2 Cover Assembly pp 2 vn dada asid na 2 5 8 13 3 2 B 2 5 Positioning Potentiometers 2 5 3 26 27 Power Supply pp 2 5 Pre POoSItIOE sasa bd metes 2 2 Helays Avni a 2 1 2 5 6 3 2 Serial Number es 1 2 15 B 2 4 Service Information 2 1 NOLES isha tes a br m B 1 Service and Support sss 2 15 Service Parts Codes 1 1 4 1 continued 1 1 GENERAL INDEX Soner CUSHION ri erri eret fee te egeris B 5 Solenoid Wiring B 2 Solenoid Manifold Assembly
6. Dimensions 6 30 BR 15cm ert P E 2227 jJ 30 228 v2 la 33 2 84cm 070011 Figure A 1 1010 15 20 Chair Footprint Dimensions 70 lt 178 SPS dv 7 Xe 38cm A En 13 em 33cm gt 290068 Figure 2 1010 Chair Vertical Dimensions A 1 30cm 070009 63cm 070010 L 20 51cm Figure A 3 1015 20 Chair Vertical Dimensions A 2 SERVICE NOTES Eliminating Hydraulic Cylinder Noise In most cases it will not be necessary to replace the cylinder to solve a noise problem Order A dec P N 61 0839 00 an hydraulic oil additive The additive eliminates any low pitched groaning caused by the piston seal In rare cases the noisy cylinder will emit a high pitched squeak caused by the cylinder rod wiper being dry The squeak can be eliminated by applying a light coating of a lubricant such as A dec silicone lubricant P N 98 0090 00 to the cylinder rod If the cylinder continues to squeak after it s been lubri cated or groans even with the additive installed order a replacement cylinder Improved Headrest Glidebar Tension Wedge Wear in the headrest glidebar tension mechanism may reduce or eliminate the tension adjustment range Order A dec P N 61 1303 00 a new sliding wedge assembly The new wedge assembly has a Nylatron wear pad linear expander spring and ure
7. Figure 4 12 Headrest Glidebar Brake Assemblies Table 4 11 Headrest Glidebar Brake Assemblies Parts List Description Screw Btn Hd Soc 10 32 X 1 2 SST Sliding Wedge Assy Glide Bar 1010 Guide Block Headrest Molded Nut Hex 10 32 X 3 8 X 1 8 STL Screw Pan Hd Phil 10 32 X 1 3 4 Wear Pad Sliding Wedge Molded Sliding Wedge Tension Adjust Molded Spring Headrest Tension Molded Headrest Glidebar Brake Assembly Nut Hex 10 32 X 3 8 X 1 8 STL Screw Pan Hd Phil 10 32 X 1 3 4 Sliding Wedge Assy Guide Block Glide Bar Headrest Part No 005 110 00 61 1570 00 61 1568 00 006 081 00 001 161 00 61 1569 00 61 1572 00 61 1571 00 006 002 00 001 161 00 Code o00 001010 01010 A A AS 0 290089 290090 Figure 4 13 Vac Back Manifold and Pivot Arm Leveling Assembly Table 4 12 Vac Back Manifold and Pivot Arm Leveling Assy O A Parts List Ref No Description Part No Code 1 Weldment Backrest 1010 1015 Chair 6 Weldment Backrest Vac Back 1015 6 8 290085 2 Manifold Assy Vac Back PE 61 1022 00 3 3 Screw Soc Hd 10 32 X 3 8 Zinc 001 016 00 5 4 Link Pivot Arm Vac Back 1015 61 1448 00 1 5 7 Retaining Ring External E Ring 25 Dia 010 053 00 1 6 8 Retaining E Ring Externa
8. 3 9 Procedures Depressurizing the Hydraulic System 3 24 Eliminating Hydraulic Cylinder Noise B 1 Eliminating Hydraulic System Buzz B 3 Installing a Second Footswitch B 4 Navigating the Flow Charts 3 2 Remove and Replace a Solenoid 3 1 Replace a Damaged Limit Switch B 4 Replace Yellowed Armrests B 2 Replacing a Pump Cover or Store Button B 2 Replacing a Printed Circuit Board B 2 Replacing All Four Solenoids B 2 Tests Testing Procedures 2 5 6 Chair Test Points 800 3 17 Continuity and Voltage 3 18 Limit Switch Continuity sss 3 18 Power Cord Continuity 3 18 Pump Motor 3 22 Relay Click Test pp 3 17 Solenoid Continuity pp 3 21 Solenoids for Magnetic Pull 3 22 Switch Voltage seen 3 20 Wiring Harness Continuity Test 3 19 GENERAL INDEX Back Till inscrit ivt 2 2 5 7 4 8 B 5 Base Lift 4 8 Bas plate secs ceases e e e eed 2 1
9. BASE POSITIONING POTENTIOMETER 290079 TILT CYLINDER ROD gt gt BACK POSITIONING POTENTIOMETER N NOTE SIMPLIFIED FOR CLARITY 290066 Figure 2 5 Positioning Potentiometers 2 5 Safety Stop Switches Models 1015 and 1020 only A chair safety stop switch will be actuated by any object being caught between the bottom cover of the chair lift arm and the chair baseplate The two series connected switches see Figure 2 6 are normally closed to enable the base and back down relay cir cuits If a safety stop switch is actuated opened three things will happen 1 The base and back down function relays are dis abled causing the down function solenoids to shut off the flow of hydraulic fluid to the cylinders 2 The controller sensing that the down relays have been disabled turns off the hydraulic pump 3 All chair functions with the exception of base up are disabled by the controller The safety stop limit switch mechanism has no adjust ments For testing procedures refer to Page 3 18 PCB 24V CONTROLLER MOTOR DRIVER RELAY 424V 1 DOWN DOWN L RELAY SOLENOID DRIVERS RELAYS 1 77 espa eet ie ch St as Poet Sha Sn RI LIMIT SWITCHES 080100 Figure 2 6 Safety Stop Limit Switches 2 6 Back Up and Base Up Limit Switches The chair base and
10. 3 18 3 5 Positioning Pot Continuity 3 19 3 6 Wiring Harness Continuity Test 3 19 3 7 Positioning Pot Voltage Test rere terrre rot 3 20 3 8 Voltage ert on ken kn A A RARA 3 20 3 9 Disconnect Solenoid Wiring Harness 3 21 3 10 Solenoid Continuity Test issus ctione ports ree reor erret etus SEQ eq ite 3 21 3 11 Pump Motor Current Test rer ree e 3 22 3 12 Testing Solenoids for Magnetic Pull esses 3 22 3 13 Remove and Replace a Solenoid pp 3 23 3 14 Depressurizing the Hydraulic System pp 3 24 3 15 Adjusting Rate of Travel 3 24 3 16 Adjust the Base Up Limit Switch pp 3 25 3 17 Setting Chair 3 25 3 18 Adjust the Base Positioning Pot 3 26 3 19 Back Positioning Pot Assembly rr rre eee v ni te ee seis 3 27 3 20 Install the Pot Drive 3 27 3 21 Setting the Back Positioning Pot pe 3 27 3 22 Programming the Chair pe 3 28 3 23 Adjusting Headrest Glidebar Tension 2 3 29 3 24 Adjusting Headrest Pivot Tension 3 29 4 1 Service Parts Code Column it a ae aki kek ak 4 1 4 2 1015 20 Lower Covers 4 2 4 3 1015 20 Safety Stop Bracket and Switches 4 3
11. 4 Remove the positioning pot assembly and helical drive shaft from the chair 5 Pull the helical drive shaft off the pot shaft 6 Install the helical drive shaft in the chair as shown in Figure 3 20 7 Turn the positioning pot full counterclockwise see Figure 3 21 8 Reinstall the pot assembly on the helical drive shaft 9 Check the electrical connections to the limit switch and positioning pot make sure the connections are proper 10 Reprogram the auto positioning functions COUNTERCLOCKWISE 290117 Figure 3 21 Setting the Back Positioning Pot 3 27 Adjust Auto Positioning Multifunction Footswitch Using the footswitch set the chair to the desired posi tion For chairs manufactured prior to December 21 1990 insert a probe that is approximately 3 I6 inch in diameter and 3 inches long into the hole located on the right side of the motor compartment cover see Figure 3 22 Momentarily push the probe in gently actuating the store button and within four seconds press the GREEN Pre Position or RED Auto Return button on the foot switch to store the position Chair S N L086602 and newer have a rubber grom met type button which eliminates the need for a probe to actuate the auto positioning store button Later chairs include an audible tone generator An audible tone confirms programming operations Adjust Auto Positioning 8 Function Footswitch Using the footswitch set th
12. BASE UP SOLENOID 290112 Figure 3 12 Testing Solenoids for Magnetic Pull 3 22 SOLENOID MANIFOLD ASSEMBLY POPPET POPPET SLEEVE WASHER SOLENOID C ID WASHER SOLENOID Cem SPECIFICATIONS TO J10 RETAINING NUT 290113 Figure 3 13 Remove and Replace a Solenoid Remove and Replace a Solenoid Refer to Figure 3 13 when completing the following steps 1 Move the chair to the full base and back down position Unplug the chair from its power outlet WARNING THE SOLENOID COILS ARE POWERED BY LINE VOLTAGE 100 120 OR 240V AC FAILURE TO UNPLUG THE CHAIR MAY RESULT IN SERIOUS INJURY FROM ELEC TRICAL SHOCK Using a pair of wire cutters cut the wiring to the faulty solenoid at about midpoint between the solenoid and connector J10 Using a 9 16 wrench remove the solenoid retain ing nut and slide the coil off the poppet sleeve NOTE Use caution when removing and replacing the coil the poppet sleeve is easily bent Even slight bending of the sleeve will result in the malfunction of the solenoid valve Using a flat tipped screwariver loosen then remove the sleeve and poppet from the manifold assembly WARNING TO PREVENT THE POSSIBILITY OF OVER HEATING AND FAILURE REPLACE THE 10 ENTIRE SOLENOID ASSEMBLY Remove the o ring from inside the manifold Install a new o ring in the manifold Install a new sleeve and poppet in the man
13. 100V YEL 27 LI 16 4 14 lt 6 lt P10 310 3 BS UP SOL a 18 2 15 26 5 lt lt m E or VP uso 5 lt 100V 12 8 BS UP lt 8 lt 4 De Qt 1N4148 1 4 UA 17 24 MBD701 T 9 SN74LS244N 18 23 BS DN SOL FOOT 10 D2 Ka lt 21 lt 100V 1 SWITCH a po 22 ae 1N4148 BS DN im BK UP IN FOR Yo 11 1 DLY 21 2 1 ira 112 3 BS UP 1 4 lt ur SOL 11 4 BS DN Ut D3 K3 mx 4 1N4148 BK UP 5 amp cors 4 LE Ti cora 11 COL 1 7 BK DN SOL lt Sone ros 1 lt 1 lt DNS 1 Do Ti lt lt CENTRYEXT m dedi DN ZESPN COM 1 2N6427 T T Ne 5 lt SBS ur 1 5 PLACES Lt F23 10 A 11 Vo ii 12 45V RNI 13 coL4 1K Ett gt F310A sw2 A 14 t lt 3 ARS 7901 1 LMP1 T lt 1 lt 97793 5 1 1 2 P121J12 T lt DUPLEX lt 1 lt RECEPTACLE 1 215 OPTIONAL i Lupo ES J2 GND 1 N VA 18 i P4 2 3 1 1 J4 1 1 i l sa 24 MAE 1 gBKUP i ev cs 1 1 7 85 6 divo 2200 1 LI 1 1 g AG p Li 4 dis REN 05 1 A c4 1 2 3 1 acl 1N4001 E BSUP DB1 z M 45V 159 1 LAAH R2 LAA Ri L L L Us 1 5 BACK BSUP BK UP CUSPIDOR 1 7805 1 1 8 o8SDN POSITION POSITION 18 L8 vor l 1 POTENTIOMETER
14. 2 1 2 5 7 4 8 9 B 2 Terre ie MT qM A 1 Standard Articulating Headrest 4 21 Starter Capacitor 2 2 4 6 7 Store Button Extension Assembly B 2 Surf Colored 1015 Chair Armrests B 2 Swivel Brake o oder te s 4 18 19 Systems Description 2 2 PONS e s iive ar Hx dota 2 2 5 Thicker Upholstery eene B 5 Toeboard Assemblies 1 2 2 1 4 20 B 1 Vac Back Umbilical Changes B 3 Vac Back uident dde tents 4 15 17 B 3 5 Vinyl Upholstery een B 5 Year and Model Variations 1 2 PART NUMBER INDEX 001 002 00 rta tate dene 4 9 001 0 13 00 nter 4 23 001 016 00 5 ti rete ette tina 4 15 00150212005 nne nens 4 3 001 022 it dete he em ee as 4 25 001 161 00 in E 4 14 001 1 27 00 aic 4 19 002 015 00 eec T 4 25 002 024 00 etn tes remettre 4 5 13 002 039 00 5 sitem tents or eee 4 19 002 050 0022 tetti inet toe tius 4 12 002 073 00 nca censeas 4 21 002 080 00 tete 4 12 15 002 085 0 1i cotes 4 11 002 089 00 tite te reciban 4 23 002 101 00 eee tease 4 9 002 1 1 3 00 erem ave Da fe ai ia te
15. Rene dun 1 2 2 1 Dental Chair Assemblies ood boiled Roi a 2 1 2 2 Electronic and Hydraulic Systems pe 2 2 2 3 Electronic and Hydraulic Systems 2 3 2 4 SUD PIY a ke kaka a kk kk ee beo tu tu exis 2 5 2 5 Positioning Potentiometers 2 5 2 6 Safety Stop Limit Switches 2 2 6 2 7 Base and Back Up Limit Switches esse 2 6 2 8 Base Up Limit Switch 4 nnne 2 7 2 9 Back SWA e e ia e 2 7 2 10 High Pressure Port Check Valves pe 2 7 2 11 Electrical Schematic 100 P N 61 1373 01 2 8 2 12 Electrical Schematic 120 P N 61 1214 01 2 9 2 13 Electrical Schematic 240 P N 61 1217 01 2 10 2 14 Electrical Schematic 100 P N 61 1373 00 2 11 2 15 Electrical Schematic 120 P N 61 1214 00 2 12 2 16 Electrical Schematic 240V P N 61 1217 00 2 13 2 17 SENS MAN 2 14 3 1 Chair TeSt POMS ed eoa a ap si 3 17 3 2 POB MEA USA m ciue i 3 17 3 3 Power Cord Continuity Test er Rr rH 3 18 3 4 Limit Switch Continuity Test
16. 31625 1 1 8 lt 9 V 10 55 UP 1 4 PLACES Li F2 3 10 A 11 lt 7 1 5V Ars Ey 12 6 45V RN1 n 13 200 4 1K pulun ESIUR Sw Aa 14 t AS o lt lt 4 pa EP LMP1 7793 1 2 lt g P121 J12 i 4 lt 2 DUPLEX t 1 lt RECEPTACLE OPTIONAL gt 2 lt GND ov v Fi 1 1 1 8A n Pa P6 1 1 2 3 1 2 3 4 2 345 6 1 1 J6 1 N N N I 1 1 1 i o 4 moe 424V 1 1 BK UP L C oq C gt 1 mmm c5 n p 1 1 7 8 5 6 12V 2200 1 4 l 1 AGI L BK DN 1 1 o A A 1 05 7 OF JM A S AA i 4 1N4001 1 L o BS UP i gt DB1 us 1 15 i LAA R2 LAA 9 9 us 1 o BACK BSUP BK UP CUSPIDOR 1 7805 1 8 gBSDN POSITION POSITION L8 L8 L8 1 ran 1 POTENTIOMETER POTENTIOMETER i eENIRVEXIT 1 i 1 1 PRE POSITION 1 NOTES 080105 ALL CAPACITOR VALUES ARE IN MICROFARADS Figure 2 17 Model 1010 Dental Chair Electrical Schematic 100V PCB P N 61 1373 00 ZH 09 09 A00 1 H3MOd IndNI
17. CONTINUED FROM PAGE 3 11 Does base or back only go in one direction e WIRING AND CONNECTIONS Does base or back go in wrong direction Isa pot shaft slipping Yes No Do base or back shut off at same time Is pot resistance 0 5K Q Pot wiring amp connections 00 POSITIONING POT IS REPAIR OR FAULTY REPLACE REPLACE THE THE POT WIRING AND CONNECTIONS 3 12 CHECK FOR FAULTY POSITIONING POTENTIOMETERS C ON NEWER CHAIRS TIGHTEN THE GEAR SETSCREW AND THEN ADJUST THE POT ON OLDER CHAIRS USE A GENER AL PURPOSE INSTANT ADHE SIVE TO GLUE THE GEAR OR HELIX DRIVE SHAFT TO THE POT SHAFT 4 IS FAULTY REPLACE THE PCB GO TO PAGE 3 13 CONTINUED FROM PAGE 3 12 Isa pot shaft slipping Incomplete Auto Positioning Cycle ON NEWER CHAIRS TIGHTEN THE GEAR SETSCREW AND THEN ADJUST THE POT ON OLDER CHAIRS USE A GENERAL PURPOSE INSTANT ADHESIVE TO GLUE THE GEAR OR HELIX DRIVE SHAFT TO THE POT SHAFT FAULTY PCB REPLACE THE PCB CHECK FOR A LOOSE OR DAMAGED POT MOUNT OR IMPROPER ADJUSTMENT BASE SWITCH BASE POT I3 BACK POT 3 13 Auto Positioning Function Inoperative What to look for The positioning potentiometer wiring is faulty A faulty printed circuit board PCB A positioning potentiometer is faulty A faulty footswitch START Re program the chair with new auto
18. Relay Click Test If you listen when actuating any function on the footswitch you should hear a clicking noise coming from the PCB Figure 3 2 identifies the five relays on the PCB by function You can easily identify which relay is clicking just note which function you have actuated and if you hear a clicking noise the relay is being energized The motor relay is energized only for up functions 3 17 Continuity and Voltage Tests WARNING HAZARDOUS AC VOLTAGES ARE PRESENT ON THE PCB AND MOTOR PUMP WIRING FAILURE TO FOLLOW ALL SAFETY PRECAU TIONS MAY RESULT IN SERIOUS INJURY FROM ELECTRICAL SHOCK Power Cord Continuity Test NORMALLY CLOSED 290104 Figure 3 4 Limit Switch Continuity Test 3 18 WARNING MAKE CERTAIN POWER HAS BEEN REMOVED FROM THE CHAIR BEFORE PROCEEDING FAILURE TO REMOVE POWER FROM THE CHAIR WILL RESULT IN SERIOUS INJURY FROM ELECTRICAL SHOCK OR DEATH 1 Disconnect the power cord J1 from the chair Printed Circuit Board PCB see Figure 3 3 2 Touch a VOM probe to pin 1 of J1 and the other probe to first one and then the other blade of the power plug One blade should give a reading of 1 2 ohm or less the other blade should read infi nite resistance If both blades indicate infinite resistance the power cord is defective and must be replaced 3 Touch a VOM probe to pin 3 of J1 and repeat step two above 4 Touch a VOM probe to pin 2
19. Yes CHECK FOR SHORTING WIRES AT FOOTSWITCH CONNECTOR P2 ON PCB Does chair move to wrong position 3 11 Unplug the footswitch and dine use the PCB test points to program program the chair ok Yes REPLACE THE FOOTSWITCH GO TO PAGE 3 10 3 9 Unable to Program Auto Positioning CONTINUED FROM PAGE 3 9 Open or short in positioning pot wiring REPAIR POSITIONING POT WIRING Poor or reversed pot connections 2 Yes REPAIR POSITIONING POT CONNECTIONS PCB IS FAULTY REPLACE THE PCB 3 10 Incomplete Auto Positioning Cycle What to look for The positioning pot wiring is damaged Reversed or poor positioning pot connections A positioning pot is damaged or in deadband A positioning pot is not properly installed or adjusted A faulty controller PCB A new PCB that is not programmed for auto positioning A loose or damaged positioning pot mount START Hasa new PCB been installed Yes RE PROGRAM THE CHAIR PCB Hasa new pot been installed Yes VERIFY THAT THE POSITIONING POT HAS BEEN INSTALLED CORRECTLY Does base or back travel time exceed 40 45 sec 2 Yes ADJUST THE MANIFOLD METERING SCREWS Is back stopping short of full upright Yes gt POSITIONING POT IS IN DEADBAND ADJUST THE POT BASE POT No I3 BACK POT GO TO PAGE 3 12 3 11 Incomplete Auto Positioning Cycle
20. a 3 BS yo sou 2 s a D7 MBD701 Di K5 lt 1N4148 BS UP 08 T ole UA 17 24 MBD701 SN74LS244N 777 18 23 BS DN SOL FOOT MN D6 p ERE ii 2 120V SWITCH n 22 0701 di 1N4148 BS DN 52 1 m A 1 e 21 4 SA n 1 28502 7 d uium 1 D3 K3 Dl 4 BS DN 4 t m Senis 14148 52 BK UP 5 lt 1 38V Ti 20012 COL 1 E RNG lt REPOS T 1 1 uo de Ti 8 Sevraviexi 1 04 olds 9 T 1N4148 T Ses DN 1 4 1 NS lt 5 UP COM 1 1 5 PLACES 4 F2 3 10 A 6 11 V 52 2 1 12 45V 13 200 4 1K eni 14 JA 4 lt INPUT POWER N 1 7 T lt 120V 50 60 HZ 1 lt 2 GND i P121 J12 T a DUPLEX 1 4 lt 1 N RECEPTACLE 1 OPTIONAL 7 lt 2 GND vvv v ti viv ve ve 1 1 N NY P4 P5 P6 14 1 1 1 2 3 1 2 3 4 1 3 4 5 6 1 2 1 i Ja 5 J6 Ju d T 1 1 4 32 1 1 1 UA nn Yr 424V 1 1 C gt 2 101010 l ETE i 1 SEG VR 7 8 5 6 2200 1 1 Li id i RA 16 BK DN 1 PAP us 1 05 1 WE SF JM 5 6 n 1 ab i G RO 1N4001 1 1 12 ssup DBT z 1 M 1 1 45V 1 15 1 AA R2 LAA Ri LA L i 1 1 m n IE d men a LEE 1 8 gBSDN POSITION POSITION 18 18 1015 20 1 l dal
21. 290100 Figure 2 10 High Pressure Port Check Valves 2 7 8 6 45V 2 1 1 1 AIR ELECTRIC SWITCH 5 HANDPIECE LOCKOUT 1 1 MES n 34064 1 E 1 12V i 1 2 10 1 1 RN3 i zd vx 1 45V A 38 MURATA n 1 1 R5 ann PKB30SPC 3001 i LITT 1 5V 37 12K 1 1 l NMGSB06N 1 n 5 36 bree m 1 90 7733 2 A Tu H 1 35 8 2 3 4 5 8V ANA Do 2N3904 34 5 1 swi 77 po 3n 2e v 9 33 1 1N4148 2 19 Jo n m cs 51K 1 J11P1 STORE 9 9 32 1 lt n 1 2 13 L 10 8 31 24V 1 15 5 11 30 a lt 1 TN Po Jo g ale 17 3 12 29 28 DI Ki 8 15 lt 14 5 S o as 1N4148 MOTOR 1 eve I 27 1 16 4
22. Also to check or do that should repair the chair check the PCB connector P6 limit switches GO TO PAGE 3 4 1 REPLACE THE FUSE This is a list of things to do Complete the list in the order listed 2 CHECK FOR FAULTY SOLENOIDS 3 2 Chair is Inoperative What to look for A faulty base or back up limit switch No power available to the chair The chair is in hydraulic lock A blown power or solenoid fuse A faulty controller PCB or footswitch START Do any relays onthe PCB click Is the base back all the way down Yes GO TO PAGE 3 5 Has the solenoid GO TO PAGE 3 4 fuse blown REPLACE THE FUSE CHECK FOR 120V only A SHORTED SOLENOID OR SHORTED WIRING TO THE SOLENOIDS Is the chair in hydraulic lock Magnetic Yes pull at each solenoid DEPRESSURIZE THE HYDRAULIC SYSTEM REMOVE AND REPLACE CHECK FOR AND THE FAULTY SOLENOID REPLACE A FAULTY B MANIFOLD OR VALVES 3 3 Chair is Inoperative CONTINUED FROM PAGE 3 3 REMOVE AND REPLACE THE FUSE THEN CHECK THE POT WIRING FOR DAMAGE SHORTS OR IMPROPER WIRING IF THE FUSE BLOWS AGAIN UNPLUG THE POT WIRING AT P4 AND P5 ON THE PCB IF THE FUSE STILL BLOWS REMOVE AND REPLACE THE PCB OTHERWISE REMOVE AND REPLACE THE POT WIRING CHECK CONDITION OF THE SAFETY STOP LIMIT SWITCHES AND WIRING 2 CHECK THE PCB CONNECTOR P6 LIMIT SWITCHES 3 UNPLUG THE CHAIR
23. Q4 1N4148 io Gsm 1 2N642 gt T t 5 Vs lt 85 5V 4 PLACES Li F23 10A 4 kone si 1 HP 45V RNI 0014 1K enun 14 AND 3 2 4 1 INPUT POWER 1 120V 50 60 HZ 1 2 GND P121J12 1 n 3 DUPLEX 1 RECEPTACLE gt OPTIONAL d 2 GND vvv NAN AN AN v Fi 1 1 v N d N 1 8A n P4 P5 P6 1 40 EL Be Se 12 1 1 n J5 J6 1 1 N YS 24V I E i Man pq 1 1 1 1 m 1 1 1 HAT T 4 i Nu L 3 BS UP M LZ L 19 n LA R2 LAA o 92 1 1 1 BSUP BKUP SAFETY PLATE 7805 i 5 OBSDN 1 ER AEN is is ILIMIT SWITCHES 1 i Fo 1 POTENTIOMETER POTENTIOMETER 2m 177 ies 1 1 1 1 1 PRE POSITION NOTES 1 080106 ALL CAPACITOR VALUES ARE IN MICROFARADS Figure 2 18 Model 1010 15 Dental Chair Electrical Schematic 120V PCB P N 61 1214 00 91
24. SAN BASE gas SOLENOID DOWN SOLENOID x CHECK 1 VALVE CHECK Q Q VALVE SCREENS BACK UP BASE UP SOLENOID SOLENOID 7 TRAVEL ADJUSTMENTS HYDRAULIC FLUID RESERVOIR LIFT CYLINDER SINGLE ACTING GRAVITY RETURN LIFT CYLINDER SCAVENGE LINE 080108 TILT CYLINDER SCAVENGE LINE Figure 2 20 Model 1010 15 20 Dental Chair Hydraulic Schematic onBWIYIS Service and Support Given proper care A dec Models 1010 1015 and 1020 Dental Chairs will provide years of trouble free service In the event something does go wrong with the chair and you are unable to identify and correct the problem you should call your authorized A dec dealer or dental equipment supplier Anytime you call your dealer or supplier be prepared to provide the fol lowing information about the chair 1 Model number 2 Serial number 3 Symptoms of the problem 4 What action you have taken toward correcting the problem For more information about the chair serial number tag and where the tag can be found on the chair refer to Section 1 Introduction page 1 2 2 18 SECTION 3 TROUBLESHOOTING Introduction The information in this section will help you find and repair chair failures If you are unable to repair the chair call your authorized A dec dealer When calling your dealer refer to Sectio
25. thane back up pad to provide a greater adjustment range and improved holding capability The new wedge replaces the existing wedge in the headrest glidebar tension mechanism Installation instructions are included with the new wedge assembly Improving Lumbar Support If necessary the position of back lumbar support can be modified by increasing the height of the toeboard wear pads A retro fit wear pad spacer kit is available which elevates the end of the toeboard by an addi tional 2 1 2 Order A dec P N F84 712 All 1010 1015 and 1020 chairs manufactured after chair S N G069170 include the new wear pads APPENDIX B B 1 Replacing a Printed Circuit Board Due to changes to the 1010 15 printed circuit board PCB there are new part numbers for the PCB PCB cover and the PCB store button extension assembly The most noticeable change to the PCB is that a new PCB has one or two fuse holders mounted perpendicular to the board the older PCB has a single fuse holder mounted flat on the board These new parts are shipped as a kit they are not interchangeable with the older parts The old and new part numbers and the chair serial numbers that the change took place on are as follows Description Old P N New P N S N Changeover Circuit Board Assembly 100V 61 1373 00 61 1373 01 A1XXXXX Circuit Board Assembly 120V 61 1214 00 61 1214 01 J078003 Circuit Board Assembly 240V 61 1217 00 61 1217 01 H073332 PCB Cover Assembly 61 1386 00
26. 1 POTENTIOMETER POTENTIOMETER SEE 1 1 se CENTRYIEXIT 1 1 WE 1 PRE POSITION NOTER 1 ALL INDIVIDUAL RESISTOR VALUES ARE IN OHMS 1 4 WATT 5 TOLERANCE t2 ALCAPACITOR VALUES ARE IN MICROFARADS 080103A Figure 2 12 Model 1010 15 20 Dental Chair Electrical Schematic 120V PCB P N 61 1214 01 S N H258626 and Higher 01 6 ALL INDIVIDUAL RESISTOR VALUES ARE OHMS 1 4 WATT 5 TOLERANCE 45V 1 1 2 us 1 1 1 33 MC34064 40 1 C1 1 10 Jj 1 RN3 39 35v 3 38 MURATA R5 PKB30SPC 3001 i 37 12K 1 I n d NMC9306N l 20 90 5 45V i 1 1 35 4 8 1 swi 19 o 3n Soon 1 R4 V 2 Jos mn Sik i STORE o 11 9 9 32 1 Y
27. 2 6 Brake Lever 2 4 18 Chair Dimensions 1 2 Chait Back uiis 2 1 5 4 15 16 B 3 5 Circuit Board Assembly 4 7 B 2 Controller Software Change B 4 Dental Chair Assemblies 2 1 Double Articulating Headrest 3 1 4 22 23 B 2 Electrical Schematic 100V 2 8 11 Electrical Schematic 120V 2 9 12 Electrical Schematic 240V 2 10 13 Electro Hydraulic System 2 2 3 17 21 4 6 8 Electroni Control anian do irridens 2 2 Fiter Screens reen a a aea ove a 4 8 Footswitch 2 2 2 5 4 24 25 B 4 FUSE Holders 35 xr desti en rrr tage B 2 rte tf re b vaste To SEPA 4 7 Hydraulic Fluid A 4 1 7 Hydraulic LOCK pp 3 3 5 8 24 Hydraulic Schematic pp 2 14 Hydraulic System 2 1 2 7 3 1 B 3 Hydraulic Cylinders 2 2 B 1 3 4 Hydraulic Fluid Reservoir 2 2 4 6 7 B 3 Hydraulic Additive 04 40 00 1 Hydraulic Pump 2 2 6 7 4 6 7 B 3 IC Cuspidor Safety Switch B 5 Illustrated Parts Breakdown
28. 4 4 1010 OWT COVES eret ottenere adiri 4 4 continued List of Illustrations continued Figure No Title Page 4 5 Base Positioning Potentiometer Limit Switch and Bracket Assembly 4 5 4 6 1010 15 20 Hydraulic Power Assembly 4 6 4 7 Hydraulic Manifold Solenoid Assembly 2 4 8 4 8 Base Lift and Back Tilt Hydraulic Cylinders 4 10 4 9 Back Cover and Armrests 4 11 4 10 Upper Structure s osos asso LE Ae 4 12 4 11 Back Positioning Potentiometer Limit Switch and Bracket Assembly 4 13 4 12 Headrest Glidebar Brake Assemblies 4 14 4 13 Vac Back Manifold and Pivot Arm Leveling Assembly 4 15 4 14 Vac Back Cover and Pivot Arm Assembly 4 16 4 15 Swivel Brake Assembly ppp 4 18 4 16 Toeboard and Seat Assembly pp 4 20 4 17 Standard Articulating Headrests 4 21 4 18 Double Articulating 4 22 4 19 Multi Function Foot Switch 4 24 4 20 8 Function E dentes 4 26 A 1 1010 15 20 Chair Footprint Dimensions 2 A 1 A 2 1010 Chair Vertical Dimensions eee A 1 A 3 1015 20 Chair Vertical Dimensions sss A 2 SECTION 1 INTRODUCTION This manual cont
29. Breakdown IPB includes Service Parts Codes in the right hand column of every parts list see Figure 4 1 Service Parts Codes help you determine what parts should be kept on hand and aid you in locating those parts when they are needed SERVICE PARTS CODE COLUMN Figure 4 1 Service Parts Code Column Service Parts Codes are defined as follows Code 1 Parts designated as Code 1 are those items that can be purchased at retail hardware stores in most parts of the United States Service delays are minimized when these parts are obtained locally In areas where Code 1 parts are not avail able they can be ordered from A dec Hardware Store Items Code2 Field Repair Kit Code 2 parts are included in an A dec Field Repair Kit when available Currently a field repair kit for A dec Models 1010 15 20 Dental Chairs is not available Code3 Service Vehicle Parts Stock Code 3 parts are items we suggest you carry in your service vehicle A dec does not offer a Code 3 parts kit as service requirement quantities vary in different areas Select and stock Code 3 parts that satisfy the needs of your area Code4 Dealer Shelf Stock Code 4 parts are those that in addition to Code 2 and 3 parts should be stocked by the dealer SECTION 4 ILLUSTRATED PARTS BREAKDOWN Code 5 Factory Order Code 5 parts are readily available from A dec These parts are not needed frequently enough to justify keeping them in stock at the dea
30. Chair Back Cable Assy Lift amp Tilt Limit Switches Sankin Air Elec Sw Cable Assy 1010 Sankin Part No 61 1332 00 61 1333 00 61 1334 00 61 1338 00 61 0109 03 61 1326 00 61 1327 00 61 1328 00 61 1339 00 004 161 00 61 1489 00 006 112 00 041 164 00 041 165 00 025 058 00 006 016 00 005 1 10 00 036 035 00 61 0109 02 61 0217 03 61 1214 01 61 1217 01 61 1373 01 041 360 00 046 069 00 61 1503 00 61 1366 00 61 1384 00 Code OOmO OO 00 8 7 Figure 4 7 Hydraulic Manifold Solenoid Assembly 6 7 Table 4 6 Hydraulic Manifold Solenoid Assembly Parts List Ref No Description Solenoid 8 Watt 100V Solenoid 8 Watt 120V Solenoid 8 Watt 240V O Ring AS568 016 614 ID X 070 W Plunger and Spring Solenoid Plunger Guide Solenoid Washer Solenoid Solenoid Nameplate Solenoid Nut Solenoid Manifold Tilt Washer Flat STL PL 156 ID Screw Soc Hd 6 32 X 1 3 4 BIk Decal Speed Adj Tilt Screw Tr Hd Slot 2 56 X 1 8 SST Screw Flow Adjust 10 56 Decal Speed Adj Lift O Ring AS568 010 239 ID X 070 W Manifold Lift Ftg W O Ring JIC 37 Deg Str Thrd Spring Helical Comp 250 OD X 40 Stem W O Ring Check Valve O Ring AS568 004 070 ID X 070 W Elbow 3 8 Poly X 1 8 MPT Screen Manifold Inlet Ftg W O Ring JIC 37 Deg Str Thr
31. LIMIT i 9 M SCREWS 3 Position the chair as shown in Figure 3 17 MOUNTING sure from the top of the base plate to the flat area BRACKET around the threaded stud the chair adapter mounts to p 4 Push the limit switch against the actuator pin see m Figure 3 16 on the drive gear until the switch opens clicks then tighten the clamping screws 22 5 Position the chair base down until the limit switch Bor has closed then position the chair full base up ASSEMBLY OMITTED Check the distance between top of the base plate FOR CLARITY 290098 to the flat area around the threaded stud the chair adapter mounts to If the distance isn t correct Figure 3 16 Adjust the Base Up Limit Switch repeat steps 2 through 4 9 C N 290068 290001 Model 1010 Model 1015 and 1020 Figure 3 17 Setting Chair Height 3 25 Adjust the Base Positioning Potentiometer To adjust the base positioning potentiometer pot 1 Using a 5 32 inch hex key remove the motor pump cover and set the cover aside Position the chair as shown in Figure 3 17 Mea sure from the top of the base plate to the flat area around the threaded stud the chair adapter mounts to Using a 3 16 inch hex key remove the limit switch and pot assembly mounting screw see Figure 3 18 Turn the gear on the pot shaft counterclockwise until it stops see Figure 3 18 Align the pot assem
32. POTENTIOMETER 1 eee ee ee ee ee ENTRY EXIT 1 1 1 oi OPRE POSITION 1 ALL INDIVIDUAL RESISTOR VALUES IN OHMS 1 4 WATT 5 TOLERANCE ILLL AL CAPACITOR VALUES ARE IN MICROFARADS 080102 Figure 2 14 Model 1010 Dental Chair Electrical Schematic 100V PCB P N 61 1373 01 ZH 09 05 A001 H3MOd IndNI 1 1 1 1 1 MC34
33. Seat Assembly Ref No On Description Cover Assy Seat amp Toeboard RH Surf 1010 Cover Assy Seat amp Toeboard LH Surf 1010 Screw Btn Head Soc 10 32 X 3 8 Zinc Cover Assy Seat amp Toeboard RH 1015 Cover Assy Seat amp Toeboard LH 1015 Seat amp Toeboard Assy 1010 Chair Seat amp Toeboard Assy 1020 Chair Retaining Ring Circle Cotter 3 8 Dia Pin Clevis 375 Dia X 1 88 Lg STL Part No 61 1210 00 61 1208 00 005 012 02 61 1414 00 61 1418 00 61 1257 00 61 1607 00 010 050 00 011 087 00 Code OODO 290086 290092 Lo v Figure 4 17 Standard Articulating Headrests 290078 Table 4 17 Standard Articulating Headrest Parts List Ref Ref No Description Part No Code No Description pPartNo Code 2 Headrest Assy Articulating Surf 61 1227 00 5 1 Headrest Assy Articulating Surf 61 1227 00 5 2A Headrest Upholstery specify color 61 5 1 Knob Locking Headrest 61 1232 00 4 2B Stand off 5 16 Hex 1 1 8 Lg 10 32 51 037 018 00 5 1B Washer Thrust Bearing 500 ID 004 136 00 5 2C Washer Flat Brass 200 ID 004 015 00 5 1C Bearing Thrust Needle 500 ID 016 033 00 5 2D Pivot Block Artc Headrest 61 1512 00 5 1D Washer Thrust Bearing 500 ID 004 136 00 5 2 Screw Soc Hd 10 32 X 3 4 Zinc 002 073 00 1 2
34. a thicker set of uphol stery with added lumbar support will be standard for 1010 15 20 chairs The original upholstery was made using 2 thick foam the new upholstery is made from foam 2 3 4 thick The new upholstery set provides a softer cushion New Upholstery Material A dec has begun using two lines of vinyl upholstery material from a new supplier One line Duration replaces the Naugahyde Neochrome and has the added advantage of an antimicrobial ingredient The other new line Hampton replaces the Naugahyde Caressa Color choices have changed slightly contact your A dec authorized dealer for more information 1010 15 20 Vac Back As the backrest of the 1010 15 20 Vac Back Chair moves from upright to supine the assistant s instru ment holder does not remain perfectly horizontal 6 variation maximum With the back up the holder bar will be horizontal As the back is lowered the bar will tilt a bit then as the back goes further down the holder will return to a nearly horizontal position The interim is minimal and may not be noticed by most users and does not effect the performance of the Vac Back unit However if the holder bar is not hori zontal when the chair back is placed in the preferred operating position an adjustment can be made Place the chair in the preferred operating position then raise or lower the instrument holder bar until it is in the desired position A slip joint a
35. back up limit switches detect when the maximum allowed up travel is reached The two limit switches are normally closed enabling the base and back up relay circuits see Figure 2 7 If an up limit switch is actuated opened two things hap pen 1 The base or back up function relay is disabled causing the up function solenoid to shut off the flow of hydraulic fluid to the cylinder 2 The controller sensing that a back up or base up relay has been disabled turns off the hydraulic pump For testing replacement or adjustment procedures refer to Page 3 1 424V PCB i 1 MOTOR CONTROLLER RELAY MOTOR DRIVER RELAY Li i 424V i i i 1 i BASE UP BASE UP gt RELAY SOLENOID DRIVER RELAY 1 l 1 1 1 i 24V 1 BACK UP BACK UP RELAY SOLENOID DRIVER RELAY 1 1 1 1 1 1 1 1 1 1 1 1 BASE ap LIMIT SWITCH LIMIT SWITCH 080101 Figure 2 7 Base and Back Up Limit Switches The base up limit switch is actuated by a pin located on the positioning potentiometer drive gear see Fig ure 2 8 The back up limit switch is actuated by a glide block which is part of the back tilt mechanism see Figure 2 9 ACTUATOR LIMIT SWITCH 290098 Figure 2 8 Base Up Limit Switch ACTUATOR LIMIT SWITCH 290099 Figure 2 9 Back Up Limit Switch Hydraulic S
36. chair The hydraulic system is controlled by the electronic control module using relays and solenoid actuated valves The parts of the 1010 15 20 chairs are shown in Figure 2 1 HEAD REST ARMRESTS UPPER STRUCTURE AND SWIVEL UNDER TOEBOARD 290077 Figure 2 1 Dental Chair Assemblies 2 1 Systems Description Refer to Figure 2 2 below and Figure 2 3 on page 2 3 while reading the following descriptions Electronic Control The electronic control system consists of Hydraulics The hydraulic system consists of An hydraulic fluid reservoir The fluid level in the o A microcomputer based controller that A scans 9 9 reservoir can be seen through the sides of the reservoir and is serviced via a top fill cap Hydraulic cylinders for base lift and back tilt func tions Pressurized hydraulic fluid extends the cylinder rod during base and back up functions Springs and gravity retract the rod during base and back down functions A motor driven hydraulic pump and starter capacitor that supplies hydraulic fluid from the reservoir under pressure to the chair lift and tilt hydraulic cylinders for Back Up and Base Up functions A solenoid manifold assembly to gate hydraulic fluid to and from the two cylinders Depending on the chair function called for the controller selects which solenoid actuated manifold valves are opened or closed The solenoid manifold assem bly also includes four adjustable needle valve
37. fet 4 23 91 1338 00 va bay saaa den dwa de deh 4 7 PART NUMBER INDEX 61 1339 00 tere nes 4 7 61 1946700 4 19 612185100 itive uiti cete inre ci 4 11 6151366 00 x45 onn ecd emend 4 7 61 196 7500 7 4 itt redet e tee ids 4 5 01 19 73 0 1 bean twa ben 4 7 61 1984 00 acer tne tit eda 4 7 6151395 00 ta sie epe ebrii 4 2 61 1396 00 rt tne ee iie ts 4 2 61 1997 00 5 itte ette tas dan syen ize twa ran 4 2 61 1398 00 iei dece acida 4 2 615139900 xu dint ome ttes menta 4 2 01 1400 00 2 ede tete de tts 4 2 0151401 00 a 4 2 61 71404 00 va may tie recette 4 11 4 3 01 1412 00 ttes eene ets 4 3 7 61 1413 5005 siete eet biete reda 4 3 61 1414 00 itii ie etie 4 20 4 20 61 1438 00 Aisyen retenti e trn dee 4 11 GOTTA OO isc nite erre date te cesse diae 4 2 61 1448 00 5 eya vw deyo a okay iet ctia 4 15 015148300 urea ceto tha 4 19 61 1488 00 dr rete ete ce ron a 4 7 6151502 00 5 oen tee hee tas rende teens 4 5 61 1508 00 iiie dee ine tds 4 7 01515092000 ctn ecd s rect eis 4 21 61 1512 00 iiin i ien an hee eere ee 4 21 61151300 cte 4 21 1 1525 0 4 19 01 1532 00 matte 4 17 01 1533 00 wii aa rek ane a eden 4 17 615153500 5 tue dete ete ede 4 17 6121536 00 iiti tie idera 4 19 6151537500
38. first used on the armrests shipped between mid January 1990 and mid May 1990 pro tected well against UV rays but did not resist alcohol based chemical disinfectants As a result this barrier coating was being wiped off with certain alcohol based disinfectants The currently used coating gives excellent UV stability as well as offering superior resistance to disinfectants To replace yellowed arm rests order A dec P N 61 1404 00 Improved Clamping on Double Articulating Headrest The headrest locking capability has been improved by changing the handle and nut insert from 1 2 13 threads to 1 2 10 threads The improved clamping will allow the headrest to carry a higher load As a result of these changes the handle will be slightly harder to turn requires about 2096 more effort The new han dles do not look any different When a new handle A dec P N 61 1553 00 replaces A dec P N 61 0825 00 is ordered the mat ing locking nut A dec P N 61 1551 00 will be includ ed Eliminating Hydraulic System Buzz Beginning in June 1990 1010 15 20 chairs include larger diameter pickup tube in the hydraulic fluid reservoir A larger pickup tube increases the flow of hydraulic fluid to the pump and eliminates the tenden of the hydraulic system when the fluid is cold to emit a momentary buzzing noise caused by the hydraulic pump cavitating If a chair emits a momentary buzzing noise when cold check for the type of re
39. 00 4 ki iet ted diner 4 11 61 0109 03 iat cheated Si Se e tss 4 7 61 1250500 Givi advent teet nee 4 11 GIEOZAASOZ e v octo ceteri atte ideo 4 7 12 61 125 005 ciii oso teh e 4 20 61 03935 00 ik ite testi icr 4 25 61 1267 00 itai ente 4 10 12 61 0336 00 aiite iterata rine 4 25 6171275 005 iacente A 4 3 4 61 0337 00 teet e 4 25 61 1287 00 latere a ne 4 10 61 0460 00 va nate n btts 4 9 a tete ia 4 5 61 0461 00 ic inedite 4 9 61 1314 00 2 2 titre tirer 4 12 61 0464 00 kaa ki apante a eben 4 9 61 1315 00 it zie dak pk wa tra ak apab ae oak ees 4 13 61 0465 00 oi ee W oka ea es 4 9 61 1326 00 rhe e e ced s 4 7 6120785 00 5 5 i itte be teen da 4 23 61 1327 00 treats teet te rire dite 4 7 61 0 85 ak aw va dw e diens 4 23 61 1328 00 iicet nite tite dents 4 7 61 0802 01 i nii ee dames 4 25 61713932 00 aiii dta gemit 4 7 61 080300 5 4 a eet erg 4 25 6171333700 d e eter e etes 4 7 61 0804 00 inen 4 25 61251334500 nist Sette ten hea eerie fate 4 7 61 0815 02 cei nti ee 4 23 61 1335 00 5 iie eiecit 4 9 61 0816 00 4 dandam 4 23 61183000 k k anda umet artis 4 9 61 0817 02 5 i Ga ted een ode 4 23 61 133 7 00 x eh Doe hte e e ee rd tes 4 9 61708 18 02 dwa ak panou te fusce
40. 010 053 00 55 neut eoe entend 4 15 011 035 00 1 deed hem de e rgo 4 13 011 052 00 4 25 PART NUMBER INDEX 011 087 005 ao etre eere 4 20 61 0822 01 eae ne 4 23 011 091 00 dnye sede 4 19 61 0826 02 i eee tris 4 23 011 092 00 9 4 kaka a idet it tit 4 19 61 082 02 tei decet scettr der 4 23 012 0 11 00 e ics 4 2 61 0828 02 ki di eas dines 4 23 Q13 044 00 ete tee edits 4 9 61 0829 02 teet ted iot nee 4 23 013 054 00 rhet pe fete fet 4 12 61 0830 01 caeso mettere 4 23 O13 067 00 ii dito tic tertie inet 4 25 61 0925 01 2 iui ttc 4 17 015 015 007 3 5 ai estet etate 4 25 61 0953 0 T civ terea eterna deum 4 17 016 033 00 eves arse eir eee 4 21 23 61 0969 01 a tete eoe yes 4 24 016 059700 iniit etcetera tee 4 17 61 09 4 25 016 054500 4 17 61 0972 1 nie ou de ie 4 25 017 007 00 5 duet emet 4 25 61 0974 00 3 22 nie utente dst 4 25 018 010 01 nere e e 4 11 61 0974 01 a eere Deme 4 25 018 040 00 eire tette d tete pe tene fe 4 17 61 0975 005 noctes rete inne 4 25 022 025 00 5 0 tni ayo uten dentis 4 9 61 0976 0 1 iati tet ciere 4 25 022 049 00 4 9 61 0991 00 5 earnest 4 15 025 058 00 04 ote ee tentes 4 7 6151022 00 22 tete e eee te ame 4 15 030 004 00 t
41. 064 40 1 10 5 1 1 59 1 1 45V 3 38 1 l 1 5V 1 4 37 1 HH NMCG306N c2 5 36 1 1 20 90 733 Re SK 45V 1 1 5 12K 6 35 4 8 n i 10 34 3 5 1 swi 45V Di i 1 9 8 m Hos 70 STORE o 11 9 9 T 32 1 31 2 13 7 10 24V 15 5 11 2 30 m 3 lt E 9 4 17 3 12 m 29 6 13 28 8 5 as 14148 52 MOTOR E 27 6 lt 74 16 4 14 m mi 2 15 26 BS UP SOL 3 7 lt BEN T D7 H MBD701 I 120 lt 12 8 16 25 01 ES 8 lt T DS Qt 1 4148 i U4 17 24 MBD701 t 9 lt SN74LS244N 18 23 BS DNSOLL 4 10 2 FOOT i lt D2 120 SWITCH 22 1N4148 BS DN 2 1 pa Q2 4 va ian few INFOR 21 Gn A T m 2 MOTOR DLY o 1 ti 3 BS UP nose pa 4 BK UP SOL L4 11 BS DN u D3 120 4 1 1 Ti Beny 1N4148 32 1 BK UP T j 1 20012 7 EM 30 4 1 PRE POS 1 120V TI 5 Senven 04 o T n Q4 1N4148 BK DN AG a ES DN cou 2N6427 n 88 ur 45V 5 PLACES Li F2 3 10 A 7 Ii 1 12 LAY 45V RNI lt coL4 1K 14 AND 3 2 1 2 L 1 N INPUT POWER 1 120V 50 60 HZ 2 GND P121J12 1 n 1 t 3 e DUPLEX 1 11 RECEPTACLE 1 gt OPTIONAL H7 2 GND v 1 1 Nec owe Nw ritu A 18 P4 P5 P6 1 12 3 1 23 4 12 345 6 l J4 J5 J6 1
42. 1 MR 1 1 P4 P5 1 12 3 12 3 4 12 345 6 1 1 E 5 1 1 i N Y Yi B 1 1 JUMPER DA Re UD A Uh I CEU 1 r a ap d Mao i gt i d 1 642 1 N BKON 1 1 1 11 4 la 29 7 1 JI3 AA J14 1 470 li SA L 1 ic Xs m 17 tE 79 1 T lt O 0 T l LI 281 Zo 4 M M 1 45V li 15 LA A RI us n l BASE BACK BSUP BKUP SAFETY PLATE 7805 LIMIT SWITCHESI n 1 SON 1 POSITION POSITION is is 1 1020 NT 1 POTENTIOMETER POTENTIOMETER PLI 1 1 1 BL equis ea ENTRY EXIT 1 UK ONLY 1 1 PRE POSITION i Neves 1 ALL INDIVIDUAL RESISTOR VALUES ARE IN OHMS 1 4 WATT 5 TOLERANCE ice ey I ape NIA ALL CAPACITOR VALUES ARE IN MICROFARADS 080104 Figure 2 16 Model 1010 20 Dental Chair Electrical Schematic 240V PCB P N 61 1217 01 ZH 09 08 H3MOd 1 bl G
43. 1 EU N Y Y Y Y YN 1 1 JUMPER 24V co AN an i Man qi YO M C5 YY ss 6 ay LI 1 AG put i BK DN 1 C4 1 1 470 05 1 BTT JM gt 3 1 La gt ad 14001 1 1 1 DBT 2 l Y LZ Li 1 vo 5 AA R2 LAA RI o 9 8 91 1 05 1 L LI BASE BACK BSUP BKUP SAFETY PLATE f 7805 LIMIT SWITCHESI 1 182 BSDN 1 POSITION POSITION 1015 20 li 1 am s 1 POTENTIOMETER POTENTIOMETER E I 1 1 1 o LI 1 ENTRY EXIT 1 1 1 oL 1 PRE POSITION NOTES 1 ALL INDIVIDUAL RESISTOR VALUES IN OHMS 1 4 WATT 5 TOLERANCE _ _______________ VALUES ARE IN MICROFARADS 080103 Figure 2 15 Model 1010 15 20 Dental Chair Electrical Schematic 120V PCB P N 61 1214 01 EL G 1 1 1 1
44. 1 pon PRE POSITION NOTES 1 ALL INDIVIDUAL RESISTOR VALUES IN OHMS 1 4 WATT 5 TOLERANCE t ALCAPACITOR VALUES ARE IN MICROFARADS 080102A Figure 2 11 Model 1010 Dental Chair Electrical Schematic 100V PCB P N 61 1373 01 ZH 09 09 A001 H3MOd IndNI 6 1 1 1 1 U6 1 MC34064 i i 12V l 1 10 1 39 1 45V 3 38 MURATA 1 R5 PKB30SPC 3001 1 DE poa 37 i 12K NMC9306N 5 36 2 1 90 33 R2 SK 45V i 12K 6 35 4 8 n V NA Do 2N3904 34 3 5 DI 2 9 ZS 8 2 33 1 cs 51K J1 1 1 STORE o 1 lt ul 9 9 T 32 2 lt 4 13 7 10 31 24V 15 5 n 2 30 a 3 t EI g ale 17 3 12 m 29 5 14 6 13 28 05 m MOTOR 5 lt t E 4 E 27 m t 6 16 4 14 m lt a 5 7 lt 18 2 15 m 26
45. 14 E 5 61 lt t P10 210 5 Fi 2 15 26 BS UP SOL x lt 71 lt 2 2 p T 8 100V E D7 Ki MBD701 12 8 16 25 DI 8 58 Qt 1N4148 4 4 UA 17 24 MBD7001 lt SN74LS244N 77 18 23 lt BS DN SOLL 4 FOOT lt 06 D2 Ka 100v SWITCH 22 MBD701 a 1N4148 BS DN 52 A 1 ee 3 FUNCTION 21 Dou 12 2 4 SETS 11 BS UP 5 4 lt UP SOL 4 m E 100V lt 1N4148 SZ BK UP Ti 5 Score 1 li M Soc 1 i B RN4 l BK DN SOL Ti PRE POS 1 w T 100V 1 x TS 5 1 Wi 9 7 1 4148 Ses DN 1 1 5 lt UP COM 1 1 5 PLACES LI F2 310 A 11 1 12 ev 45V RNI 2 f k 2504 1K 14 END t 13 A d KJ P121J12 lt o DUPLEX 1 11 N RECEPTACLE n OPTIONAL 1 Fi lt 2 lt GND 1 18 1 p poo 1 1 i 1 1 4 32 1 1 l o 1 UW 1 Man ko Wt EDADE UN Yon SAT E3 n 7 85 6 HN 1 BKON n H o AAA 1 D5 1 H 4 gt 1N4001 1 C6 BSUP lor DBI z 1 M 45V 1 1 j LA LA RI L L Ls piy 1 o i Base 55 pack BSUP BK UP BUSHIDO 1 7805 1 8 gBS DN POSITION POSITION E 1 ph l Ra 1 POTENTIOMETER POTENTIOMETER 1 1 e ENTRY EXIT 1
46. 25 Long X 31 OD Brass 61 1413 00 5 6 Screw Button Head Soc 1 4 20 X 1 005 109 01 5 7 Baseplate 1010 15 20 Chair Gray 61 1275 00 5 259090 Baseplate 1010 15 20 Chair Surf 46 61 1275 01 5 Not Shown Cable Assy Lift Tilt Safety Switch 1015 20 40 61 2099 00 3 A Cable Assy Lift Tilt 1010 61 1220 00 3 Co Table 4 3 1010 Lower Covers Parts List Ref No ARUN Description Cover Lift Arm Right Surf Cover Assy Lift Arm Left Surf Screw Btn Hd Soc 1 4 20 X 5 8 NkI Screw Btn Hd Soc 1 4 20 X 3 8 NkI Cover Hydraulic Pump Part No 61 1206 00 61 1205 00 005 002 01 005 112 00 61 1204 00 Code Figure 4 4 1010 Lower Covers 5 9 Co 9 290121 S Figure 4 5 Base Positioning Potentiometer Limit Switch and Bracket Assembly O G y Gy N 9 9 5 Y Table 4 4 Base Positioning Pot Limit Switch and Bracket Assy Parts List Ref No Description Part No Code 1 Screw Soc Hd 4 40 X 3 4 Zinc 002 024 00 1 2 Mounting Plate Limit Sw 125 Dia 61 1367 00 5 3 Limit Switch Modified 044 049 01 3 4 Mounting Plate Limit Sw 4 40 60 0080 00 5 5 Potentiometer 5K Ohm 2095 1W W Nut 041 372 00 3 6 Nut Included with Pot 7 Set Screw Soc Cup Pt 4 40 x 1 8 007 010 00 5 8 Gear 10 Tooth 24 Pitch 250 OD 61 1222 00 5 9 Set Screw Soc Cup Pt 10 32 x 5 16 007 004 00 5 10 Gear Molded 24 Pi
47. 5 iit ttd nete nte ai 4 19 01 1538 00 4 19 G11 540 00 kk vi aa dw 4 19 61 1541 00 5 inest 4 19 61154200 mes 4 19 01 1 51 00 eara toa eene 4 23 6151553 00 4 23 61 1568 00 5 inicie tie 4 14 6151569700 ket iiec Ate ettet is 4 14 61 15 0 00 teeth eere eg 4 14 4 14 6121572 00 4 14 691 1607 00 te 4 20 284 705 diea te oto ate n ain as 4 12 ge E 4 12 37 385 iii saba vekse di neh son 4 13 PUB NO 85 0808 00 10 94 ardec POST OFFICE BOX 111 NEWBERG OREGON 97132 0111 U S A TELEPHONE 1 800 547 1883 503 538 7478 TELEX 4970448 FAX 503 538 5911 Printed in U S A Copyright 1994 All Rights Reserved
48. 61 1515 00 B193179 Store Button Extension Assembly 61 1389 00 61 1530 00 Replacing an old style circuit board If you are replacing a circuit board on a chair having a serial number prior to those listed above order a new PCB and a PCB conversion kit A dec Kit No L37 365 The in line fuse 120V chairs only can be left in the solenoid wiring harness when replacing an old style circuit board Replacing a cover or store button extension assembly The old style cover A dec P N 61 1386 00 assembly and store button extension assembly A dec P N 61 1389 00 are available for field replacement should they become lost or damaged Replacing all four solenoids If you are replacing all four 4 solenoids on a 120V chair specify that the solenoid set is for a 120V chair to ensure a solenoid fuse is included in the wiring har ness This applies only to a 120V chairs prior to S N 4078003 Replacing only one solenoid When replacing only one solenoid order the appropri ate kit listed below Voltage P N 100V L37 386 120V L37 387 240V L37 388 B 2 Included with the appropriate PCB Yellowing 1015 Chair Armrests Surf colored 1015 chair armrests have in the past shown a tendency to yellow when exposed to ultravio let light and certain alcohol based disinfectants To eliminate the problem A dec has been molding the armrests with a protective barrier coated material since mid January 1990 The barrier coating
49. 8 290089 6 Table 4 14 Swivel Brake Assembly Parts List Ref No om ou 10 11 11 11 11 11D 11E 11F 11G 12A 12B 12C 12D 12 Description Screw Btn Hd Soc 1 4 20 X 3 8 Nkl Cover Back Lower Surf Grip Vinyl White 3 8 X 1 1 8 X 4 Brk Handle Vac Back 1015 Chr 3 8 Thk Brake Handle 1010 Chair Grip Vinyl White 3 8 X 1 1 8 X 4 Brake Handle 1010 Chair 3 8 Thk Brake Handle Bent Vac Back 1015 Washer Flat STL PL 219 ID Screw Soc Hd 10 32 X 1 Zinc Washer Flat STL PL 219 ID Screw Soc Hd 10 32 X 1 Zinc Brake Assy 1010 15 20 Chair Screw Soc Hd 1 2 13 X 1 1 4 Zinc Pin Spring 125 Dia X 56 Lg STL Brake Pad 1 00 X 600 X 125 Thk Washer Flat STL PL 219 ID Screw Soc Hd 10 32 X 1 Zinc Brake Caliper 1010 1015 Chair Pin Spring 125 Dia X 313 Lg STL Brake Assy 1010 15 Chair Screw Soc Hd Special 1 2 13 X 1 1 4 Brake Pad 1 00 X 750 X 125 Thick Brake Caliper Washer Flat STL PL 219 ID Screw Soc Hd 1 4 20 X 1 2 Cad Plated Part No 005 112 00 61 1542 00 61 1525 00 61 1541 00 61 1346 00 61 1525 00 61 1540 00 61 1483 00 004 165 00 002 039 00 004 165 00 002 039 00 61 1538 00 001 177 00 011 092 00 61 1537 00 004 165 00 002 039 00 61 1536 00 011 091 00 Code 00005005010 1 CO1C0101C01 01 01010101 02 7 Table 4 15 Toeboard and Seat Assembly Parts List Figure 4 16 Toeboard and
50. 90123 1 O Ring 5568 012 364 ID X 070W 030 012 00 4 2F O Ring AS568 012 364 ID X 070 W 030 012 00 4 1F Weldment Glidebar 1010 15 20 61 1509 00 5 2G Washer Thrust Bearing 500 ID 004 136 00 5 1G Pivot Block Artic Headrest 1010 15 20 61 1512 00 5 2H Bearing Thrust Needle 500 ID 016 033 00 5 Mm 2 Covenfeadresi 10107018 61 15130 4 pover Headrest Otago e 2K Screw Btn Head Soc 10 32 X 1 2 SST 005 110 00 1 2L Knob Locking Headrest 61 1232 00 4 Figure 4 18 Double Articulating Headrest Part No 61 0814 02 Surf 900 9 9 9 c Table 4 18 Double Articulating Headrest Parts List Ref gt o Description Headrest Cover Dbl Artc Hr Surf Screw Pan Phil 6 32 X 1 1 2 Zinc Headrest Yoke Surf Pivot Shaft Upper Headrest Crm Handle Dbl Artic Headrest Surf Washer Thrust Bearing 500 ID Bearing Thrust Needle 500 ID Side Plate Headrest Body Surf Screw FI Hd Phil 4 40 X 1 2 Set Screw Soc Cup Pt 10 32 X 3 16 Pivot Shaft Lower Headrest Crm Screw FI Hd Soc 10 32 X 1 2 Zinc Bumper Headrest Slide Bar Surf Slide Bar Dbl Artc Hr Plate Set Screw Cup Pt 1 4 20 X 1 1 4 Bushing Modified Headrest Set Screw Flat Pt 6 32 X 3 8 Body Dbl Articulated Hr Surf Locking Nut Headrest 1 2 10 Thd Screw FI Hd Phil 4 40 X 1 4 Bumper Headrest Body Surf S
51. COO M I SERVICE GUIDE FOR DENTAL CHAIRS MODELS 1010 15 20 October 1993 Table of Contents Section 1 Introduction eI AME 1 1 Year and Model Variations 4 1 2 Section 2 Service Information ee 2 1 oysters DeSeriDIOH ra 2 2 9 iz sb ENTE 2 2 Me 2 2 Functional Descriptio Ou OU edita it 2 5 Power Supply n ne den 2 5 FOOISW LE 2 5 Back and Base Positioning Potentiometers 2 2 5 Safety Stop SWIICH8S te as ael 2 6 Back Up and Base Up Limit Switelies a cte te 2 6 2 7 Electrical SOASM YUCS e yi ente via pea 2 8 Fiyaraulic 9 kikit ko k ik eed De ka ok das Ua ME E 2 14 SBlvi6e ard SUBBOr Esc ka ta kata ea er 2 15 Section Troubleshooting 3 1 opi E eee 3 1 Navigating the Flow Charts retirer te toes ie et au e EE RER PER RSEN 3 2 Section 4 Illustrated Parts Breakdown Service Pans z m RN 4 1 Appendix A Specifications ses A 1 Appendix B Service eee B 1 Lau uM E MA EA Ad 1 List of Illustrations Figure No Title Page 1 1 Serial Number Tag oett eed tek e
52. D X 1 25 Not Shown Cable Assy Foot Sw Multi Function Gray Part No 61 0804 00 61 0803 00 002 015 00 001 022 00 003 097 00 017 007 00 61 0971 01 61 0335 00 004 010 00 61 0336 00 015 015 00 041 119 00 61 0337 00 011 052 00 61 0802 01 041 059 00 61 0975 00 61 0974 00 61 0972 01 61 0974 01 013 067 00 61 0976 01 Code AWWA WAHRAWAHAAHOTW Figure 4 20 8 Function Foot Switch Part No 61 2027 00 Table 4 17 8 Function Foot Switch Parts List Description Part No Code 1 Label Footswitch 8 Function L H 051 163 00 5 2 Label Footswitch 8 Function R H 051 164 00 5 3 Actuator Program Footswitch 8 Function 61 2043 00 5 4 Actuator Assy Footswitch 8 Function 61 2042 00 5 5 Cover Assy Foot Switch 8 Function Surf 6 61 2047 00 5 6 Membrane Switch Foot Switch 8 Function Service Kit 61 2189 00 5 7 Base Footswitch 8 Function 61 2040 00 5 8 Bumper Pad Rubber 1 2 Dia Gray 017 007 00 5 9 Screw Pan Hd Phil 6 32 X 7 8 Zinc 002 032 00 1 10 Washer Lock Int Tooth 6 Zinc Plated 004 073 01 1 11 Cable Assy Foot Switch 8 Function Surf 6 61 2108 00 5 4 26 APPENDIX SPECIFICATIONS Voltage 100 120 VAC or 240 VAC Amperage 8 5 Amp 100 120 VAC max load 4 25 Amp 240 VAC Est Weight 1010 270 Ibs 136 kg 1015 20 270165 136 kg Hydraulic Fluid 30 oz Dry fill Order A dec P N 61 0197 00 one 16 oz bottle
53. FROM IT S POWER OUTLET AND PLUG IT IN AGAIN 4 IF THE CHAIR IS STILL INOPERATIVE MAKE SURE THERE IS POWER AT THE OUTLET Unplug the footswitch and use the PCB test points to activate chair up function Does the chair work ok now Yes REMOVE AND REPLACE THE FOOTSWITCH No THE PCB IS FAULTY REMOVE AND REPLACE THE PCB 3 4 Base or Back Up Function is Inoperative What to look for An overheated motor pump The solenoid fuse has blown An open or faulty limit switch LS A faulty manifold valve The chair is in hydraulic lock A faulty footswitch motor capacitor or controller PCB START Is the chair base or back up Has the LS activated Yes NORMAL CHAIR OPERATION CHECK LIMIT SWITCH ADJUSTMENTS BASE SWITCH THE CHAIR MAY BE IN HYDRAULIC LOCK DEPRESSURIZE THE REPLACE THE FUSE HYDRAULIC SYSTEM CHECK FOR A SHORTED SOLENOID OR SHORTED WIRING TO THE SOLENOIDS 1 WAIT 20 MINUTES FOR THERMAL LIMITER TO RESET 2 IF THE UP FUNCTION WORKS CHECK FOR OTHER PROBLEMS Has the solenoid fuse blown 120V only Is the Yes motor pump hot Magnetic pull at the solenoid Doesa relay on PCB click GO TO PAGE 3 7 SOLENOID IS FAULTY REPLACE GO TO PAGE 3 6 THE SOLENOID 3 5 3 6 Base or Back Up Function is Inoperative CONTINUED FROM PAGE 3 5 Unplug the footswitch and use the PCB
54. OM probe to an outside pin of the pot see Figure 3 5 and the other probe to the other outside pin The total resistance of the pot should be approximately 4 6K 5K 20 If the pot resistance is outside the limits the pot is defective and must be replaced 3 Move one VOM probe to the center pin of the pot While observing the VOM slowly turn the pot shaft full one direction then the other Your VOM should indicate a smooth increase or decrease in resis tance as you turn the pot shaft If the pot resis tance fluctuates in a jerky manner while the shaft is being turned the pot is defective and must be replaced 4 When installing a positioning pot complete the adjustment procedures on page 3 28 for the back positioning pot or page 3 27 for the base position ing pot Wiring Harness Continuity Test This test is applicable to testing a limit switch or posi tioning potentiometer wiring harness assembly For demonstration purposes Figure 3 6 shows the Base Up limit switch harness 1 Disconnect the wiring harness from the limit switch or positioning potentiometer and the PCB It isn t necessary to remove a wiring harness from the chair for this test 2 Touch a VOM probe to pin 1 at one end of the har ness see Figure 3 6 and the other probe to pin 1 at the other end of the harness The VOM should give a reading of 1 2 ohm or less If the VOM indi cates infinite or fluctuating resistance the harness is defective and
55. PAS 13 7 10 31 1 2 lt o 1 lt 15 2 24V o 29 E ale 17 3 12 m o 28 D9 5 14 6 13 as 14148 1 MOTOR E 27 16 4 14 E lt T m m 3 Ed 7 lt 118 2 15 26 lt BS UP SOL 2 D7 MBD701 Di K5 8 lt 4 2 16 2 at 1N4148 BSUP U4 17 24 MBD701 t 9 lt SN74LS244N 18 23 BS DN SOL 4 FOOT 10 lt pe Pa 2 lt 240V 2 SWITCH 22 1N4148 BS DN J2 1 P2 S2 Q2 o 1 1 FUNCTION 21 i SETS 2 IN 3 BS UP LI 5 lt BR DE SOL 4 1 S1 D mm 4 1 ET w 52 eos 4 4 COL2 un 8 San 7 BK DN SOL Ti 1 lt 240V 7 o T lt 04 K2 2 1 amp ENTRYExr a 1N4148 BK DN T SS DN com 26427 T 5 lt CBSUPCOM 5 5 PLACES LI 11 gt ene 1 re 45V RNI i lt coL4 1K pulun 14 END lt 2 1 INPUT POWER 1 N 1 1 lt 240V 50 60 HZ lt GND i P121J12 1 lt DUPLEX 1 11 RECEPTACLE 1 OPTIONAL vvvv v 1 2 GND 1 N 15 100 P4 P5 P6 P14 1 2 3 28 3 4c Q 4 4 B BeOS doom m 1 1 n J4 J5 J6 J4 1 ay Y Y Y Y JUMPER 1 gaye 2 2 SSSA SOS TE eS S co 1 1 41 750 db 4 l 1010 n 5 i oH 1 Re 1 i 1 YY n
56. RAULIC FLUID RESERVOIR IMPORTANT Due to changes to the 1010 15 20 printed circuit board PCB there are new part numbers for the PCB PCB cover and the PCB store program ming button extension assembly A new PCB has one or two fuse holders mounted vertically on the board the older PCB has a single fuse holder mounted flat on the board Newer parts are not interchangeable with the older parts The PCB part number is located in the lower left corner of the circuit board Refer to Appendix B Service Notes page B 2 for additional information 2 3 Functional Description The following paragraphs describe how Model 1010 15 20 chairs function For testing or adjustment procedures refer to Page 4 1 Power Supply AC voltage 100 120 or 240V is applied to the con troller printed circuit board PCB A 5V DC and unregulated 24V is produced on the PCB The 5V is applied to the positioning potentiometers and limit switches The 24V DC is applied to the relays and relay driver circuits on the PCB see Figure 2 4 AC voltage is also applied via relays to the manifold assembly solenoids and to the motor pump assembly When a relay is closed by the controller the AC circuit is completed The power supply has no adjustments For testing procedures refer to Page 3 18 PCB MOTOR PUMP SOLENOIDS SOLENOID
57. a 2200 T eX T 1 Y N oBKDN 1 D 1 cat L4 2i lt Ns 470 5 i 1 oF o amp 1 C gt 1N4001 lt be i 1 1 z 5V 159 1 LAAH R2 LAA Ri k 615 L md ij F H akse 1 Ws SON POSITION POSITION L8 Ls m 18 1 m i i 1 POTENTIOMETER POTENTIOMETER R 1 1 jer lee eee eeu oe 4 14 wT ea ee a E A ENTRY EXIT 1 U K ONLY 1 1 PRE POSITION 1 NOTES 1 080104A ALL CAPACITOR VALUES ARE IN MICROFARADS Figure 2 13 Model 1010 20 Dental Chair Electrical Schematic 240V PCB P N 61 1217 01 S N H258114 and Higher ZH 09 08 0 2 H3MOd IndNI 45V te us P13 AIR ELECTRIC SWITCH HANDPIECE LOCKOUT 1 1 1 1 1 F MC34064 40 1 ki 1 RN3 Se 1K 5V 38 gt 1 zu n 1 1 pui a6 NMC9306N i 1 1 i 20 90 7 33 R2 m SK 45V 1 A 35 ipo 18 1 swi 77 je 45 2 o A Jo 1 1 v 19 ps 5 33 1 1 J11P1 STORE 1 lt 4 9 9 o 32 13 7 10 31 2 lt Li 424v 1 15 5 11 2 30 3 lt T 4 do JA Lot ale 17 3 12 lt qe MEL D9 8 lt 51 lt 5 13 o 28 o5 1N448 M Motor
58. ace of the braided sleeving previously used The PVC sleeve is water tight for easier cleaning and surf colored to improve appear ance To replace an umbilical with braided sleeving order A dec part numbers 61 1550 00 Umbilical Assembly 40 0145 00 Adapter Tubing 5 8 to 1 2 024 037 00 Tubing Convolute Gray 5 8 ID To install a new umbilical on a 1015 Vac Back chair complete the following instructions 1 Atthe connection to the manifold on the chair back install a short length of convolute tubing and an adapter tube Use 3M plastic adhesive 4693 or equivalent to seal the parts in place 2 Connect the end of the new umbilical vacuum tub ing to the adapter tube Use 3M plastic adhesive 4693 or equivalent to seal the parts in place 3 Atthe connection to the canister remove the old convolute vacuum tubing and install the new umbil ical vacuum tubing to the canister 4 Connect the syringe tubing Be sure to connect ribbed tubing to ribbed tubing In addition the vacuum tube inside the umbilical has been reduced from 5 8 ID to 1 2 ID to standardize Vac Back tubing between the 1005 and 1015 chairs B 3 Installing a Second Footswitch To add a second footswitch to a 1010 15 20 chair order A dec Part No 61 1029 00 The kit includes a standard gray multi function footswitch the required adapter cable hardware and instructions needed for the installation New Store Button Actuator Previously the store but
59. ains service related information for A dec Model 1010 1015 and 1020 dental chairs Before using this manual you should become familiar with its contents especially Section 3 Trouble shooting Being familiar with the content of the manual will reduce your time in the doctor s office your time in research and the frustration of trying to find informa tion Overview This manual is divided into the following four sections Section 1 Introduction Describes manual contents and how to determine what information in this manual is applicable to the dental chair you are working on Section 2 Service Information Section 2 provides a functional description of how the chair works This section also contains chair electrical and hydraulic systems diagrams and schematics Section 3 Troubleshooting When there is something wrong don t panic Just use the troubleshooting procedures in Section 3 Section 3 describes the symptoms of various problems then either tells you how to fix the problem or directs you to an appropriate procedure Section 4 Illustrated Parts Breakdown Section 4 contains the exploded parts drawings for Models 1010 15 20 Dental Chair major assemblies and includes parts lists The parts lists specify A dec part number description and service parts codes Use the information in Section 4 when ordering replacement parts 1 1 Year and Model Variations When necessary we will distinguish between varia
60. ances If the solenoid resistance is outside the range specified the solenoid is defec tive and must be replaced PRINTED CIRCUIT BOARD PCB Solenoid Resistance Range P N Voltage Q Q 61 1335 00 100V 220 200 250 um TOMANIFOLD SOLENOID 61 1336 00 120V 300 275 325 290109 Qu ASSEMBLY 61 1337 00 240V 1250 1100 1300 Figure 3 9 Disconnect Solenoid Wiring Harness J10 5 COMMON TO s ALL SOLENOIDS SOLENOID MANIFOLD N m D ASSEMBLY 7 3 2 T S poe BACK DOWN SOLENOID HIDDEN J10 1 BACK UP SOLENOID J10 4 BASE DOWN SOLENOID BASE UP J10 2 SOLENOID J10 3 Figure 3 10 Solenoid Continuity Test 3 21 DJ Pump Motor Test The Pump Motor Test requires the use of a current pickup probe Clip the probe onto the red wire going to the motor pump see Figure 3 11 and activate a base or back up function You should read 5 Amps maxi mum of current for this test 2 5 Amps for 240V motor pumps RED WIRE WHITE WIRE MOTOR PUMP 290111 Figure 3 11 Pump Motor Current Test n Testing Solenoids for Magnetic Pull While holding the tip of a screwdriver near a solenoid as shown in Figure 3 12 activate the appropriate chair function You should feel the tug of the magnetic field MANIFOLD SOLENOID generated around the solenoid ASSEMBLY BACK DOWN SOLENOID HIDDEN BACK UP BASE DOWN SOLENOID
61. bly as shown in Figure 3 18 then turn the pot drive gear clockwise two teeth relative to a tooth on the large drive gear Reinstall the limit switch and pot assembly Make sure that the pot gear does not turn and that the two gears mesh properly Check the electrical connections to the limit switch and positioning pot make sure the connections are proper While observing the two gears for binding lower the chair base Do not raise the base to full base up until after you ve checked the base up limit switch for proper adjustment the chair may go into hydraulic lock Reinstall the motor pump cover Program the auto positioning functions 3 26 LARGE DRIVE GEAR POT DRIVE GEAR e WY R ge Nu MOUNTING SCREW Poo dM e 22 Xem 290114 Figure 3 18 Adjust the Base Positioning Pot MOUNTING SCREWS 290115 Figure 3 19 Back Positioning Pot Assembly HELICAL DRIVE SHAFT 290116 Figure 3 20 Install the Pot Drive Shaft Adjust the Back Positioning Potentiometer I3 To adjust the back positioning pot potentiometer 1 Position the chair back full down 2 Liftthe toeboard and swing the roller bar assembly up under the hook welded to the underside of the toeboard Lower the toeboard hook onto the roller bar assembly 3 Using a 3 16 inch hex key remove the positioning pot assembly mounting screws see Figure 3 19
62. cep tion of Base Up are disabled when a safety stop limit switch is actuated Two potentiometers that provide the controller with current position values for the chair base and back The controller saves position values when being programmed and compares that value with current position value for Pre Position or Auto Return functions Five electro magnetic relays used by the controller to turn the hydraulic pump on or off and to select solenoid actuated manifold valves to open or close A set of test points which allow you to position the chair without using the multi function footswitch Refer to Section 3 Troubleshooting page 3 17 for more information e MULTI FUNCTION FOOTSWITCH NS BASE POSITIONING POTENTIOMETER CUSPIDOR SAFETY SWITCH SAFETY STOP LIMIT SWITCHES 1015 20 ONLY LANS LA BACK UP LIMIT SWITCH A BASE UP LIMIT SWITCH 080098 CONTROLLER CAPACITOR MOTOR PUMP MICROCOMPUTER BASED CYLINDER RETURN LINES FOR DOWN FUNCTIONS CYLINDER SUPPLY LINE FOR UP FUNCTIONS CYLINDER RETURN LINE FOR DOWN FUNCTIONS PUMP SUPPLY LINE FOR UP FUNCTIONS CYLINDER RETURN LINE FOR DOWN FUNCTIONS Figure 2 3 Electronic and Hydraulic Systems Q CYLINDER SUPPLY LINES AT TILT FOR UP FUNCTIONS CYLINDER NO LIFT CYLINDER CYLINDER SCAVENGE LINES HYD
63. crew FI Hd Phil 6 32 X 3 4 Blk Ox Screw Hd Soc 10 32 X 1 Zinc Not Shown Upholstery Contour Hr Dbl Artic Upholstery Contour Hr Dbr Artc Surf Part No 61 0829 02 005 062 00 61 0817 02 61 0822 01 61 1553 00 004 136 00 016 033 00 61 0827 02 002 114 00 007 003 00 61 0830 01 002 089 00 61 0826 02 61 0818 02 007 049 00 61 0816 00 007 052 00 61 0815 02 61 1551 00 002 113 00 61 0828 02 005 053 00 001 013 00 61 0785 00 61 0785 01 Code O0100 0101 01 010 01 01010 0101 Oi aun Figure 4 19 Multi Function Foot Switch Part No 61 0969 01 Gray 4 24 290125 Sc v Table 4 16 Multi Function Foot Switch Parts List Ref No ROM Description Strip Spacer Foot Switch Base Foot Switch Screw Pan Hd Phil 6 32 X 3 8 Zinc Screw Fl Hd Phil 6 32 X 3 8 Zinc Replaced by Screw Flat Head Self Tap Phil 6 32 X 3 8 on S N A4 0160 and later Bumper Pad Rubber 1 2 Dia Gray Base Plate Foot Sw Multi Fctn Gray Spacer Tapered Foot Switch Washer Flat Fiber 128 ID Spacer Plain Foot Switch Ball 250 Dia Stainless Steel Switch Miniature 10A 125 250 VAC Spring Elastic 11 16 Foot Switch Pin Dowel 125 Dia x 50 Long SS Body Foot Switch Cndct New Gray Switch Push Button SPST 5A 115 VAC Standoff Button Foot Switch Button Foot Switch Red Housing Button Foot Switch Gray Button Foot Switch Green Spring Helical Cprsn 720 O
64. d Screen Manifold Outlet Part No 61 1335 00 61 1336 00 61 1337 00 030 016 00 004 012 00 002 101 00 055 122 00 001 002 00 61 0460 00 055 121 00 030 010 00 022 049 00 013 044 00 61 0461 00 030 004 00 022 025 00 61 0464 00 022 049 00 61 0465 00 Code 01 7 Figure 4 8 Base Lift and Back Tilt Hydraulic Cylinders UA NS 7 SA Leas Table 4 7 Base Lift and Back Tilt Hydraulic Cylinders Parts List Ref No Description Part No Code 1 Tilt Cylinder Assembly 61 1267 00 3 2 Lift Cylinder Assembly 61 1287 00 3 230095 LEY Figure 4 9 Back Cover and Armrests Table 4 8 Back Cover and Armrests Parts List FI 5 1 Screw Btn Hd Soc 10 32 X 3 4 SST 005 007 01 2 Spacer Tube 250 X 330 Long Brass 61 1351 00 5 3 Armrest RH 61 1255 00 4 4 Cover Backrest Surf 61 1202 00 4 Cover Backrest Vac Back Surf 1015 20 61 1438 00 4 5 Screw Btn Hd Soc 10 32 X 1 NKL 005 124 00 1 6 Armrest Molded Surf 1015 20 61 1404 00 4 7 Plug Hole 1 1 4 Dia Surf 018 010 01 5 290122 8 Armrest LH 61 1253 00 4 9 Screw Flat Hd Soc 1 4 20 X 1 2 002 085 01 1 10 Screw Hd Soc 1 4 20 X 5 8 005 002 01 1 civ Table 4 9 Upper Structure Parts List Figure 4 10 Upper Structure n Ref z o OMONOORWDND Description Frame Uppe
65. d gt 1 INPUT POWER 1 240V 50 60 HZ 2 lt GND i P121J12 lt o i DUPLEX 1 N RECEPTACLE 1 1 t lt OPTIONAL 2 lt GND 1 v v telo do whoa l N 2452 NIL 255 P4 P5 P6 1 1 2 3 1 2 3 4 12 3 4 5 6 1 1 1 Ja Js J6 1 i A YN 1 1 1 24 bom uae 1 i C xe gt 1 cs plan SA m i JUMPER YY YY 2200 1 1 7 85 6 aN 200 1 lt gt 1 m 4 AC ils 1 N 1 A 1 SA D5 gt 1 gt i 1 MIN AN S ass 1N4001 5A L 1 1 bas UP L L DB1 45V i 15 1 R2 RI o o 11KV us Li l BASE BACK BSUP BK UP 7805 y 8 BSDN POSITION POSITION ts L8 kb WE 1 POTENTIOMETER POTENTIOMETER 1 1 i o Mu eet Ae Neca E UK ONLY 1 1 ini OPRE POSITION 1 NOTES 1 ALL INDIVIDUAL RESISTOR VALUES ARE IN OHMS 1 4 WATT 5 TOLERANCE n ZL LLL _ _ _ _ _ ALE CAPACITOR VALUES ARE IN MICROFARADS 080107 Figure 2 19 Model 1010 Dental Chair Electrical Schematic 240V PCB P N 61 1217 00 ZH 09 05 H3MOd IndNI SOLENOID MANIFOLD ASSEMBLY BACK TILT CYLINDER SINGLE ACTING GRAVITY amp SPRING RETURN WII Ni
66. e chair to the desired posi tion Press and release the program button see Fig ure 3 22A An audible tone will be heard Within four seconds press the right actuator see Figure 3 22A to the function 1 2 or 3 you want this chair position to be stored Now you should hear an audible tone confirming that the function has been programmed 3 28 STORE BUTTON ACCESS HOLE OR RUBBER GROM MET TYPE BUTTON 290007 290052 FOOTSWITCH Figure 3 22 Programming the Chair PROGRAM BUTTON RIGHT ACTUATOR FOOTSWITCH LEFT ACTUATOR Figure 3 22A Programming the Chair Function 3 can optionally be either Cuspidor Return Last Position or a user programmable function Cuspidor Return is used to raise the chair back to a programmable upright position providing the patient access to the cuspidor Momentarily pushing the right actuator to position 3 a second time lowers the chair back to its previous operating position Last Position is a non programmable function that simply moves the chair base and back to the posi tions that they were in previously Using this feature allows the chair to be moved back and forth between two positions by momentarily pushing the right actua tor to position 3 Switches 51 and S2 on the circuit board is used to select the function for Function 3 Function Switch 1 Switch 2 Cuspidor Return OFF OFF Last Position ON OFF User Programmable OFF ON Using a Phillips screwdriv
67. er adjust the glide bar ten sion see Figure 3 23 Turn the screw clockwise to increase friction and hold the headrest more securely Turn it counterclockwise to decrease friction and allow the headrest to move up and down more freely Adjust the glide bar tension so that the headrest moves freely yet maintains it position Figure 3 22B Programming the Chair Adjust Headrest Glidebar Tension TENSION ADJUSTMENT SCREW 290118 Figure 3 23 Adjusting Headrest Glidebar Tension 3 29 Adjust Double Articulating Headrest Pivot Tension Refer to Figure 3 24 when completing the following procedure Release the headrest locking lever and remove the headrest from the chair On the side of the headrest opposite the locking lever remove the side plate using a small Phillips screwdriver Next using a 3 32 inch hex key loosen the setscrew Using a small Phillips screwdriver remove the bumper Adjust the locking nut under the bumper using a flat tipped screwdriver Turn the nut counterclockwise to decrease pivot tension allowing the headrest to be positioned more easily Turn the nut clockwise to increase tension and hold the headrest more tightly Tighten the 3 32 inch setscrew before testing the new tension setting 3 30 FLAT TIPPED SCREWDRIVER LOCKING LEVER SETSCREW 290119 SIDEPLATE Figure 3 24 Adjusting Headrest Pivot Tension Service Parts Codes Section 4 Illustrated Parts
68. ette Peleus 4 9 61 1202 00 s eet itte te detenti 4 11 030 0 10 00 4 9 61 1204 00 section olds tenia telat cte et 4 2 4 030 012 00 ai dence imam ten 4 21 61 1205 00 1 onore eme 4 4 030 016 00 reef tete ete te taz 4 9 61 1206 00 wii enn reote pea 4 4 036 031 00 4 13 612120800 anpe den 4 20 036 035 00 4 7 61 1210 00 tetti 4 20 037 018 00 5562s te Per Ennis 4 21 61 1214 01 eiae oae 4 7 041 059 00 rt cete reg 4 25 61512147301 o ee xs 4 7 041 119 0051 4 25 615122000 4 7 041 164 00 iv daki iiit etie tritt 4 7 61 12022 00 e ess 4 5 0415165 002 run eue dete etta 4 7 61122300 5 ome 4 5 041 360 00 tei ot eee e ets 4 7 61 1224 00 55 ninh Len n ee hee 4 12 13 041 372 00 otii e tatit iuto 4 5 13 6151225 00 xcci 4 13 044 049 0011 idit itt tte niece 4 12 61 1226 00 iate tti tein 4 13 044 049 01 teak statis eet eres 4 3 5 13 61 1227 00 rene enn 4 21 046 069 00 5 ete nens 4 7 61 1228 00 20 eem teas 4 21 055 122 0025 tft eset testem petentis 4 9 61 1232 00 n eese 4 21 60 0080 00 222 4 5 61 1293 00 nite ttes 4 21 61 0109 02 x undc 4 7 6121253
69. git 4 23 002 114 00 kak tn visa kout vine ea tue due 4 23 004 010 00 wk seta cti aa 4 25 004 0 12 00 kel 5 nne ntes 4 9 004 015 00 itte tee Mate eterne 4 21 004 1 36 00 teretes 4 21 23 004 139 00 iniiaiee i 4 17 eor a O O D MEA T 4 17 004 161 00 earn aa ertt ete i 4 7 004 165 005 4 19 005 002 01 iirin annii inn aa 4 2 4 11 005 007 01 TT 4 11 005 008 00 neaei dettes 4 3 5 12 13 005 012 02 e A 4 20 005 053 00 zini ninia raa 4 23 005 062 00 5 ta delis 4 23 005 109 00 o teet tee 4 17 005 109 01 25 nne tte dan 4 3 17 005 1 10 00 52 cec tie 4 7 14 21 005 1212 007 4 2 4 19 005 124 00 2 c dc e tete 4 11 17 0006 002500 4 14 006 016 007 exime ea tution 4 7 006 023 00 5 2 cena 4 12 006 112 00 pea siveye detta tee 4 7 007 0038 00 4 23 007 004 00 ied 4 5 007 010 00 4 5 007 043 000 eim ere eet 4 17 007 04 7 00 ritenere teta seo ett 4 17 007 049 00 tertiis 4 23 007 052 00 ena deserti 4 23 010 031 00 err eter regios 4 15 010 050 001 teo Pide 4 20 010 051 00 m tei ettet ette tis 4 12
70. i MC34064 1 40 1 1 1 0 5 l 39 45V 3 38 1 1 1 HE je 4 27 NMC9306N 2 5 36 L 1 1 20 90 77 38 Um SK 45V i 12 1 1 45V 6 35 4j oo 8 1 1 10 7 34 3 pi 5 swi 1 1 KA 19 8 2 33 Hes 77 1 J11P1 STORE 1 11 9 9 T 32 T o 1 2 lt 13 z 10 31 1 15 5 n z 30 lt P9597 5 C1 E ale 17 3 12 5 2 lt 50 D9 Ki 8 5 lt 14 5 13 z as 1N4148 S moror WHT 1 t gt r 27 77 16 4 14 1 lt t m P10 210 z 7 lt 18 2 15 2 26 3 BS i D7 V MBD701 Di K5 ale LR 8 16 25 x ai 1N4148 BS UP U4 17 24 MBD701 t 9 lt SN74LS244N 18 23 P lt BS DN SOLL FOOT lt 02 Ka RAON SWITCH alo 22 di 1N4148 BS DN 5 4 IN FOR 1 BK DN MOTOR DLY o 2 lt LK1 11 BS UP TE 4 lt BK UP SOLL_ o 1 3 240V a 1 4 es DN ese Ut D3 K3 COL3 1N4148 52 BKUP 5 Ti jm 1 7 7 4 a 1 lt BKDNSOLL d 1 5 1 E m 240V 1 6 1 a 1 4148 BK DN BS DN COM 2N6427 5 9 11 11 lt asupcow 5 PLACES LI 5V eee 12 lt 45V RN1 1 1K Wen 14 8 lt e INPUT POWER 1 N 1 t lt 240V 50 60 HZ 1 1 2 lt GND P121J12 1 lt DUPLEX 1 1 N RECEPTACLE n OPTIONAL i Fi 2 lt GND viv
71. ifold Tighten the poppet sleeve using a flat tipped screwdriver Install a new coil on the plunger do not overtighten the retaining nut Strip approximately 1 4 of insulation from the wires cut in step 2 above and install a crimp on butt type connector on each wire On the new solenoid cut the wiring to length allow ing enough to reach the crimped on connectors Strip approximately 1 4 of insulation from the wires and crimp each wire into a connector 3 23 Depressurizing the Hydraulic System 1 Using 5 32 hex key remove the motor pump cover from the chair 2 Fita 5 8 open end wrench to the high pressure outlet port either the lift or tilt whichever is in hydraulic lock of the manifold solenoid assembly see Figure 3 14 3 Wrap a rag around both the fitting and the end of the wrench The rag will absorb the small amount of hydraulic fluid vented from the fitting 4 Carefully loosen the fitting about one half turn counterclockwise and re tighten 5 Cycle the chair a couple of time to verify it is no longer in hydraulic lock Adjust Base and Back Rate of Travel The manifold solenoid assembly incorporates four needle valves see Figure 3 15 which restrict or divert the flow of hydraulic fluid to and from the lift and tilt cylinders These valves provide the rate of travel adjustment for chair base and back movement The rate of travel for both the base and back is factory pre se
72. ioning POL sicco ttt tttm acte 3 27 L A Adjust Auto Positioning Multifunction 3 28 8 Function EOBISWION A 3 28 M Adjust Headrest Glidebar Tension pe 3 29 Adjust Double Articulating Headrest Pivot Tension 3 30 3 1 Navigating the Flow Charts The troubleshooting flow charts in this section of the service guide provide a map for you to follow when troubleshooting the chair Symptoms a description of the failure are printed at the top of each page see page 3 1 for a complete list of symptoms Directly below each symptom is a list of things for you to check that might have caused the failure If you already know how to troubleshoot the chair using this list should be a faster way to fix the chair than follow ing the flow charts The three kinds of symbols used in the flow charts are described for you below 4 This symbol tells you where to start the flow chart or where to go next This symbolis a Decision Block Decision blocks will ask you Do any relays Yes a question about the chair If you need help in answering the on ae question the black box with a letter in it tells you that there is a click detailed description of what to do see page 3 1 for a com plete list of detailed descriptions Check the safety stop limit This symbol is a Task Block Task blocks will give you things switches and cables
73. l 1 2 ID 010 031 00 1 9 Screw Soc Hd 1 4 20 X 3 4 Zinc 002 080 00 1 9L v Figure 4 14 Vac Back Cover and Pivot Arm Assembly 290085 8 89 G9 Oo 2 Table 4 13 Vac Back Cover and Pivot Arm Assembly Parts List Description Part No Code 1 Screw Btn Hd Soc 10 32 X 1 NKL 005 124 00 1 2 Grommet 3 8 ID X 3 16 Groove Wide 018 040 00 5 3A Washer Flat Nylon 252 ID 004 139 00 5 3B Race Thrust 252 ID 016 053 00 5 3C Bearing Thrust Needle 252 ID 016 054 00 5 3D Race Thrust 252 ID 016 053 00 5 3E Screw Btn Hd Soc 1 4 20 X 1 NKL 005 109 01 5 Screw Btn Hd Soc 1 4 20 X 1 Zinc 005 109 00 1 4 Washer Flat Nylon 252 ID 004 139 00 1 5 Washer Flat Nylon 503 ID 004 140 00 5 6 1 Dia Arm Assy Vac Back Crm Pnt 6 7 Set Screw Soc Nylon Pt 10 32 X 1 4 007 043 00 5 8 Extension Assy 2 Vac Back Crm Pnt 61 0953 01 5 9 Arm Mt W Align Mark Vac Back Crm 61 1532 00 5 10 Set Screw Soc Oval Pt 10 32 X 5 16 007 047 00 5 11 Holder Bar Assy 3 Pos IC 61 1535 00 5 12 Pivot Arm Mount Vac Back Crm Paint 61 0925 01 5 13 Holder Bar Assy 3 Position IC 61 1535 00 5 Holder Bar Artc IC 1 75 Lg 4 Pos 12 0843 00 5 Figure 4 15 Swivel Brake Assembly 2 0 7 878 0 ID lum lt E Z 29008
74. ler Code 6 Not Available for Field Replacement Code 6 parts are not available N A for field replacement or must be ordered as part of a larg er assembly 4 1 ov 290083 Table 4 1 1015 20 Lower Covers Parts list Figure 4 2 1015 20 Lower Covers 9 0 9 Ref Description Screw Btn Hd Soc 1 4 20 X 5 8 Retainer Safety Plate Cover Assy Lift Arm Lower 1015 20 Cover Lift Arm Lower 1015 20 Mounting Bracket Lower Cover LH Mounting Bracket Lower Cover RH Rivet Pop 3 16 Steel Screw Btn Hd Soc 1 4 20 X 3 8 Cover Lift Arm Rear 1015 20 Screw Btn Hd Soc 1 4 20 X 5 8 Cover Lift Arm Upper 1015 20 Cover Hydraulic Pump Vac Back 1015 20 Cover Hydraulic Pump Screw Btn Hd Soc 1 4 20 X 3 8 Part No 005 002 01 61 1401 00 61 1397 00 61 1398 00 61 1400 00 61 1399 00 012 011 00 005 112 00 61 1396 00 005 002 01 61 1395 00 61 1441 00 61 1204 00 005 112 00 290120 mw Figure 4 3 1015 20 Safety Stop Bracket and Switches Table 4 2 1015 20 Safety Stop Bracket and Switches Parts List Ref No Description Part No Code 1 Screw Soc Head 4 40 X 1 2 SST 001 021 00 1 2 Limit Switch Modified 044 049 01 3 3 Mounting Bracket Sw Safety Plate 61 1411 00 5 4 Screw Soc Head 1 4 20 X 1 2 Zinc 005 008 00 5 5 Spacer 6
75. must be replaced 3 Repeat step 2 for each wire in the harness 3 19 Continuity and Voltage Tests cont d Voltage Tests The purpose of these tests is to verify that voltage is available at each of the limit switches and positioning potentiometers pots Base and Back Positioning Pots 1 Touch the black probe of the VOM to the top pin of the pot and the red probe to the lower pin POSITIONING POT 2 The voltage available should be approximately 5V 1V If the voltage is zero the positioning pot wiring harness or the chair PCB should be replaced 290107 Figure 3 7 Positioning Pot Voltage Test Limit and Safety Stop Switches 1 Disconnect the connector from the switch Be sure to pull on the connector and not the wiring 2 Touch a VOM probe to one pin of the connector and the other to the remaining pin 3 The voltage available should be approximately 5V 1 If the voltage is zero the switch wiring har ness or the chair PCB should be replaced 290108 Figure 3 8 Switch Voltage Test 3 20 Continuity and Voltage Tests cont d Solenoid Continuity Test This test is applicable for testing 100 120 and 240V solenoids 1 Disconnect the solenoid wiring harness J10 from the PCB see Figure 3 9 2 Touch a VOM probe to pin 5 of J10 and the other probe to the pin for the suspect solenoid see Fig ure 3 10 Refer to the table below for acceptable 10 2 resistance toler
76. n 2 Service Information page 2 15 before calling Contents Page Troubleshooting Flow Charts Chair is Inoperative EHE 3 3 Base or Back Up Function is InoperativVe 25200 3 5 Base or Back Down Function is Inoperative pp 3 8 Unable to Program Auto Positioning pp 3 9 Incomplete Auto Positioning Cycle 3 93 0 0 8 9 a Pese rere 3 11 Auto Positioning Function InoperatiVe 3 259 222 d euasit acra densae pti as 3 14 Back Moves for Base Only Function eese nennen 3 15 Base Moves for Back Only Function 3 15 Test Remove Replace and Adjust Procedures A Using th Chair Test PONS niensis naa 3 17 Relay Click TeSt m P ET 3 17 C Continuity and Voltage Tests 3 18 D Pump Du in ina n fM 3 22 E Testing Solenoids Tor Magnetic Pull ei oti D oie oce extat tete ma brase bus pe 3 22 F Remove and Replace a Solenoid 3 23 Depressurize the Hydraulic System essent 3 24 Adjust Base and Back Rate of Travel 3 24 Adjust a Base Up Limit Switch ps 3 25 J Adjustthe Base Positioning POL e ERR 3 26 K Back Posit
77. of J1 and the other probe to ground on the plug The resistance should be 1 2 ohm or less Limit Switch Continuity Test This test is applicable for testing either the Base Up or Back Up limit switches For demonstration purposes Figure 3 4 shows the Back Up limit switch 1 Disconnect the wiring harness from the limit switch It isn t necessary to remove a limit switch from the chair for this test 2 Touch a VOM probe to the common terminal see Figure 3 4 and the other probe to the normally open terminal and then to the normally closed ter minal The normally closed terminal should give a reading of 1 2 ohm or less the normally open ter minal should read infinite resistance If both terminals indicate infinite resistance or indicate 1 2 ohm or less the switch is defective and must be replaced 3 If you are replacing a Base Up limit switch com plete the adjustment procedure on page 3 26 POSITIONING POT SHAFT AND GEAR POSITIONING POT 290105 Figure 3 5 Positioning Pot Continuity Test 290106 Figure 3 6 Wiring Harness Continuity Test Continuity and Voltage Tests cont d Positioning Potentiometer Continuity Test This test is applicable for testing either the base or back positioning potentiometer pot For demonstra tion purposes Figure 3 5 shows the base positioning pot 1 Disconnect the wiring harness from the positioning pot and remove the pot assembly from the chair 2 Touch a V
78. position ing settings Does the chair go Yes to wrong GOTO PAGE 3 11 position Unplug the footswitch and use the PCB test points to activate the chair auto function Does the chair function OK Yes FOOTSWITCH IS FAULTY REPLACE THE FOOTSWITCH UNPLUG THE CHAIR AND PLUG IT BACK IN IF THE PROBLEM REMAINS THE PCB IS FAULTY REPLACE THE PCB 3 14 Back Moves for Base Only Function or Base Moves for Back Only Function What to look for A faulty footswitch A faulty printed circuit board PCB Unplug the footswitch and use the PCB test points to activate the chair function Is the problem still there THE PCB IS FAULTY REPLACE THE PCB FOOTSWITCH IS FAULTY REPLACE THE FOOTSWITCH 3 15 290102 NOTE CONNECTOR P1 OMITTED FOR CLARITY Figure 3 1 Chair Test Points BASE UP RELAY Figure 3 2 PCB Relays BASE DOWN RELAY Using the Chair Test Points WARNING HAZARDOUS AC VOLTAGES ARE PRESENT ON THE PCB DO NOT TOUCH ANY PART OF THE PCB EXCEPT THE TEST POINTS The chair test points see Figure 3 1 are used to test chair functions without a foot switch being connected to the PCB For example if you short the two test points beside the Base Up BS UP label on the PCB the chair base will move up if not already in the full base up position To access the test points you must remove the motor pump and PCB covers
79. r Structure Screw Soc Hd 1 4 20 X 1 2 Zinc Link Arm Roller Toeboard Channel Guide Slide Block Tilt Cylinder Assy Hose Assy Hyd Str 90 Deg Ends 52 Lg Retaining Ring Ext E Ring 1 00 Dia Screw Soc Hd 1 4 20 X 3 4 Zinc Pad Wear Link Arm Nut Hex 1 4 20 X 7 16 X 3 16 Stl Tilt Spacer Pad Wear Link Arm Screw Soc Hd 1 4 20 X 1 3 4 Zinc Spring Helical Ext 1 25 OD X11 0 Lg Part No 005 008 00 61 1267 00 61 0217 03 010 051 00 002 080 00 61 1314 00 006 023 00 F84 705 F84 706 002 050 00 013 054 00 9 290091 Table 4 10 Back Positioning Pot Limit Switch and Bracket Figure 4 11 Back Positioning Potentiometer Limit Switch and Bracket Assembly Assy Parts List Ref No Description Part No Code 1 Screw Soc Hd 4 40 X 3 4 Zinc 002 024 00 1 2 Limit Switch Modified 044 049 01 3 3 Screw Soc Hd 1 4 20 X 1 2 Zinc 005 008 00 1 4 Bracket Upper Structure L37 385 5 5 Mounting Bracket Limit Sw Tilt 61 1315 00 5 6 Potentiometer amp Brkt Assy Back Positioning 61 1224 00 3 6A Pin Spring 125 Dia X 75 Lg STL 011 035 00 5 6B Drive Shaft Helical 8 00 Lg 61 1225 00 5 6 Tubing Yellow Urethane 3 8 OD 036 031 00 5 6D Screw Soc Hd 1 4 20 X 1 2 Zinc 005 008 00 1 6E Potentiometer 5K Ohm 20 1W W Nut 041 372 00 3 6F Mounting Bracket Pot Back Pos 61 1226 00 5 290066
80. s used to restrict or divert the flow of hydraulic fluid to and from the lift and tilt cylinders These valves provide the rate of travel adjustment for chair base and back movement 290098 Figure 2 2 Electronic and Hydraulic Systems 2 2 the footswitch for a closed switch B senses the current position of the chair C senses the status of the chair limit switches D stores programmed auto positioning data and E controls the electro hydraulic system A programming button that when pressed causes the controller to save the current chair position val ues for Pre Position or Auto Return functions e A multi function footswitch used to position the chair When programming the chair the footswitch is used to indicate which function Pre Position or Auto Return is being programmed Chair base and back limit switches to detect when the maximum allowed up travel is reached The controller will stop chair base or back up move ment if the limit switch is actuated Q On chair Models 1015 and 1020 only two safety stop switches to stop chair movement if any object is caught between the underside of the lift arm and the baseplate see Figure 2 1 on page 2 1 All chair functions with the exception of Base Up are disabled when a safety stop limit switch is actuated One safety stop switch to stop chair movement if any object is caught under a chair mounted cuspi dor not shown All chair functions with the ex
81. servoir tank located under the motor pump cover If the tank is plastic and the chair was shipped prior to June 1990 check the serial number tag replace the old pickup tube with a new pickup tube A dec P N 61 1489 00 If the chair has a metal reservoir tank install a new plastic reservoir tank A dec P N 61 1339 00 and new pick up tube assembly A dec P N 61 1488 00 Improved Headrest Knob A number of early 1010 15 chairs were shipped with out lubricant on the threads of the headrest knob resulting in the knob being difficult to tighten If you have a headrest that is difficult to tighten remove the knob from the headrest and lubricate the threads with a small amount of synthetic grease such as A dec Silicone Lubricant CAUTION DO NOT USE PETROLEUM BASED LUBRICANT such as Lubriplate Vaseline 3 in 1 Oil Handpiece Lubricant etc ON THE HEADREST KNOB Additionally the shape of the headrest knob has been changed to a scalloped design which provides the operator with a better grip The new knob began ship ping with chair S N J077784 in early October of 1990 The knob will retro fit to all earlier 1010 15 headrests To replace a smooth knob with a scalloped knob order A dec P N 61 1232 00 When installing the new knob remember to lubricate the threads with a small amount of synthetic grease 1015 Vac Back Umbilical Changes A PVC sleeve is being used to cover 1015 Vac Back chair umbilical tubing in pl
82. t at 12 seconds plus or minus 1 second CAUTION Do not completely close a needle valve port The motor pump could overheat from pumping against a closed valve and be damaged Note that the needle valves are hex drive the small slot head screws are the needle valve retaining screws and should not be removed Rate of travel adjustments should be made with 160 200 Ibs 73 91 kg the weight of an average person in the chair and the hydraulic fluid should be at room temperature To adjust the rate of travel for Base Up Down or Back Down use a 3 32 inch hex key and turn the needle valve clockwise in to decrease the rate of travel counterclockwise out to increase To adjust the rate of travel for Back Up turn the needle valve counter clockwise out to decrease the rate of travel clock wise in to increase 3 24 TILT CYLINDER HIGH PRESSURE FITTING LIFT CYLINDER HIGH PRESSURE FITTING 290110 Figure 3 14 Depressurizing the Hydraulic System BACK DOWN BACK UP BASE UP BASE DOWN 290110 Figure 3 15 Adjusting Rate of Travel Adjust the Base Up Limit Switch To adjust the base up limit switch 1 Using a 5 32 inch hex key remove the three screws securing the motor pump cover to the chair and set the cover aside SWITCH ARM 2 Using a 3 32 inch hex key loosen the two screws ACTUATOR PIN clamping the limit switch to the mounting bracket see Figure 3 16
83. t the base of the holder bar arm allows this adjustment although it will take a little effort to overcome the resistance in the joint Once the new position has been established the arm will always be horizontal when the chair back is in the preferred operating position B 5 Adjustments Adjustment Procedures 2 5 6 3 1 Base Up Limit Switch 3 25 Auto Positioning pp 3 28 Base and Back Rate of Travel 3 24 Double Articulating Headrest Pivot Tension 3 29 Headrest Glidebar Tension 3 29 Back Positioning Potentiometer 3 27 Base Positioning Potentiometer 3 26 Base Up Limit Switch sss 3 25 Programming the Chair 2 2 3 28 Rate of Travel nenne etes 2 2 Faults Troubleshooting Procedures 3 1 2 Auto Positioning Function Inoperative 3 14 Back Moves for Base Only Function 3 15 Base Moves for Back Only Function 3 15 Base or Back Down Function is Inoperative 3 8 Base or Back Up Function is Inoperative 3 5 Chair is Inoperative sss 3 3 Incomplete Auto Positioning Cycle 3 11 Unable to Program Auto Positioning
84. tch 30 Tooth 61 1295 00 5 11 Mounting Bracket Pot Base Positioning 61 1223 00 5 12 Screw Soc Hd 1 4 20 X 1 2 Zinc 005 008 00 1 Not Shown Wire Assy 3 Cond 6 Chair Lift 61 1502 00 3 1010 15 20 40 Nee 61 1221 00 9 Q Q9 3525 Gi 40 290079 9 Figure 4 6 1010 15 20 Hydraulic Power Assembly o e 9 LV Table 4 5 1010 15 20 Hydraulic Power Assembly Parts List Ref No 1 O Description Manifold Assy Hyd 100V 1010 15 20 Chair Manifold Assy Hyd 120V 1010 15 20 Chair Manifold Assy Hyd 240V 1010 15 20 Chair Mounting Tray Hydraulic Power Hose Assy Hyd Str Str Ends 12 75 Long Motor Assy Hyd Pump 100V Motor Assy Hyd Pump 115V Motor Assy Hyd Pump 240V Tank Hydraulic 1010 Chair Washer Flat Buna N 75 ID Pick Up Tube Assy Hydraulic Tank Nut Retainer 3 4 Garden Hose Thread Capacitor 50 Uf 240 VAC 60 Hz Boot Protective Capacitor Clamp Capacitor Mounting Nut Hex KEPS 10 32 X 3 8 X 5 32 Screw Btn Hd Soc 10 32 X 1 2 SST Not Shown Tubing 3 8 OD Hydraulic Fluid 8 Length Hose Assy Hyd Str Str Ends 27 25 Lg Hose Assy Hyd Str 90 Deg Ends 52 Lg Circuit Board Assy 1010 Chair 120V Circuit Board Assy 1010 Chair 240V Circuit Board Assy 1010 Chair 100V Fuse 1 8 A 250V 3AG Slow Blow Fuse 0 3 A 250V 3AG Slow Blow Wire Assy 3 Cond 48
85. test points to Does the activate chair up function up function WOrk Doesa relay on PCB click Magnetic pull at the solenoid Is the LS faulty or open ADJUST OR REMOVE AND REPLACE THE LIMIT SWITCH ADJUST THE BASE LS REPAIR OR REPLACE THE LIMIT SWITCH WIRING UNPLUG THE CHAIR AND PLUG IT BACK IN IF THE PROBLEM REMAINS THE PCB IS FAULTY REPLACE THE PCB REPLACE THE FOOTSWITCH GO TO PAGE 3 7 No LAN FAULTY SOLENOID REMOVE AND REPLACE THE SOLENOID Base or Back Up Function is Inoperative CONTINUED Is there an open in the LS wiring REPAIR OR REPLACE THE WIRING Is the LS out of adjustment Yes ADJUST THE LIMIT SWITCH BASE SWITCH Is the motor current more than 5A FAULTY MOTOR PUMP REMOVE AND REPLACE THE DJ MOTOR PUMP ASSEMBLY Is there noise from the motor pump 1 REMOVE AND REPLACE THE MOTOR PUMP CAPACITOR 2 IF THE UP FUNCTION WORKS NOW THE MOTOR PUMP No CAPACITOR WAS THE PROB LEM IF NOT THEN THE MANI FOLD ASSEMBLY IS FAULTY REMOVE AND REPLACE IT Open or short in the motor capacitor wiring THE PCB IS FAULTY REMOVE REPAIR THE MOTOR CAPACITOR AND REPLACE THE PCB WIRING Contact an A dec representative for proper repair procedures 3 7 Base or Back Down Function is Inoperative What to look for A Safety Stop switch or its wiring is open A faul
86. ting the Back Up manifold valve from closing for several sec ondas The new controller software shuts the motor off momentarily when Back Up is released allowing hydraulic pressure in the system to drop and the man ifold valve to close While there was some potential for minor damage to a chair not every chair has this problem note that there is no hazard of injury to the patient or to the operator due to this problem Improved Chair Headrest Positioning Effective August 1 1991 the headrest pivot position on the 1010 and 1015 chair glidebar P N 61 1509 00 has been modified to increase the angle that the headrest can be tipped back This modification will set the cushion approximately 3 8 back from its previous position Additionally the modification allows the headrest to be positioned approximately 1 8 lower than was previously possible IC Cuspidor Safety Switch Effective July 28 1991 the cuspidor safety switch for a 1010 15 mounted IC Cuspidor is standard The function of the safety switch is to shut off the chair if the cuspidor is lowered onto an object For ease of installation the cuspidor end of the safety switch cable plugs into a connector labeled CUSP on PCBs shipped after the above date For 1010 15 chairs having an older PCB without the cuspidor con nector an adapter cable is shipped with each cuspi dor Complete instructions are included with the kit Thicker Upholstery Effective November 1 1991
87. tions of a chair model by serial number or by the month and year manufactured The month and year manufactured information is included in the serial number of each A dec Dental Chair The month of manufacture is indicated by a code character see Table 1 1 The year is indicated by the digit following the month code see Figure 1 1 The serial number tag can be found in one of two places 1 on the top surface of a chair s upper struc ture raise the toeboard for access 2 on the under side of the right hand armrest support Table 1 1 Month of Manufacture Codes CODE MONTH OF MANUFACTURE January February March April May June July August September October November December MAC gt 1 2 CHAIR SERIAL NUMBER a dee NEWBERG lon usa SERIAL NUMBER E902440 MODEL NUMBER 1015 INDICATES THE MONTH CHAIR MODEL OF MANUFACTURE NUMBER THE SECOND DIGIT OF THE YEAR MANUFACTURED Figure 1 1 Serial Number Tag SECTION 2 SERVICE INFORMATION WARNING THE CHAIR CONTROLLER AND SOLENOIDS USE PRIMARY INPUT AC VOLTAGES 100 120 OR 240V AC FOR OPERATION TO AVOID PER SONAL INJURY FOLLOW ALL SAFETY PRE CAUTIONS WHEN WORKING ON THE CHAIR Introduction A dec Model 1010 1015 and 1020 chairs are elec tronically controlled hydraulically powered dental chairs Switches on the Multi Function Footswitch are used to position the chair and program Auto Position ing functions into the
88. ton has been actuated by inserting a probe through a hole in the motor pump cover Effective with chair S N L086602 a rubber but ton is included in the motor pump cover eliminating the need for a probe Mechanical Stop Added to Chair Back A stop bracket has been added to the chair back limit switch assembly to eliminate the following problem The chair back may be physically forced forward dam aging the limit switch assembly Although it is unlikely this would happen to an installed chair however dam age to the switch assembly may occur during ship ment or installation To replace a damaged limit switch assembly order A dec Kit No L37 389 The kit includes a new limit switch mounting bracket the stop bracket and instructions All 1010 and 1015 chairs serial number C194177 through C197582 include the stop bracket All 1010 and 1015 chairs manufactured after C197582 have the stop incorporated into the chair upper structure casting B 4 Controller Software Change A software change to the chair controller was made in November 1990 to eliminate the following problem When Back Up switch was pressed then Base Up switch was pressed then Back Up released etc in rapid succession and if the back was close to the up limit of travel the back may travel past the limit switch damaging the Back Up limit switch limit switch brack et or potentiometer assembly This was caused by hydraulic pressure in the lift cylinder preven
89. ty footswitch or controller PCB START A blown solenoid fuse The chair is in hydraulic lock Try an up function first then down function An improperly adjusted or faulty limit switch LS A faulty solenoid or valve Is the base or back still up Has the LS activated opened THE CHAIR MAY BE IN HYDRAULIC LOCK DEPRESSURIZE THE HYDRAULIC SYSTEM Yes G Magnetic pull at each solenoid Does relay on the PCB click REPLACE FAULTY MANIFOLD VALVE Unplug the footswitch and use the PCB test points to activate the chair down Has the solenoid fuse blown REPLACE THE FUSE CHECK FOR function 120V only AND REPLACE SHORTED SOLENOID OR SHORTED WIRING TO THE SOLENOIDS No REPLACE FAULTY SOLENOID Does the down REPLACE THE FOOTSWITCH function work 1 CHECK CONDITION OF SAFETY STOP AND OR CUSPIDOR LIMIT SWITCHES AND WIRING 2 ALSO CHECK PCB CONNECTOR P6 LIMIT SWITCHES 3 UNPLUG THE CHAIR AND PLUG IT BACK IN IF THE PROB LEM REMAINS THE PCB IS FAULTY REPLACE THE PCB 3 8 Unable to Program Auto Positioning What to look for Incorrect Auto Positioning programming procedures A positioning potentiometer or wiring is faulty A faulty footswitch or printed circuit board PCB START Review Auto Position ing programming proce dures refer to page 5 Does chair move during programming
90. ystem WARNING Do not service any hydraulic connections until you have depressurized the hydraulic system see page 3 24 Do not attempt to remove a cylinder until you have read the instructions included with each new cylinder You may be seriously injured if you fail to follow all safety pre cautions and instructions For up functions hydraulic fluid is drawn from the reservoir by the motor pump and delivered under pressure to the manifold solenoid assembly In the manifold assembly fluid travels past an opened solenoid operated valve and out to the cylinder extending the cylinder rod For down functions a solenoid operated valve is opened allowing fluid from the cylinders to flow back through the manifold assembly and to the reservoir The motor pump unit consists of a hydraulic pump and electric motor The pump is driven by the electric motor Internal thermal overload protection is included in the electric motor Once the chair lift and tilt cylinders have been pres surized hydraulic pressure must be maintained in the cylinders to hold the chair in position To prevent fluid draining back to the reservoir and allowing the chair to settle or drift each of the high pressure output ports to the cylinders includes a check valve see Figure 2 10 The high pressure output ports are in the hydraulic blocks HIGH PRESSURE BACK TILT O RING SPRING FITTING HYDRAULIC CHECK VALVE BASE LIFT HYDRAULIC BLOCK

dec Dental Chair

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