SERVICE MANUAL SUPPLEMENT
Contents
1. POWER ATTACH TEST EOUIPMENT AND REAPPLY POWER TO TEST Page 17 of 4 MODEL 291205 SLICER SERVICE PROCEDURES AND ADJUSTMENTS 2 Verify both screws are touching the drive studs by inserting a thin piece of paper between the adjusting screws and the tray arm drive studs then closing the arm against the adjusting screws Open the arm remove the paper and check it for signs of contact Both screws must make contact with the tray arm drive studs TRAY ARM DRIVE STUDS Check the gap between the tray edge and the knife edge by measuring at three points A Move the tray until point 1 tray V is above the knife edge Measure the gap and record the dimension B Move the tray until point 2 leading edge of tray is above the knife edge Measure the gap and record the dimension C Move the tray until point 3 upper tip of tray wall is above the knife edge Measure the gap and record the dimension CARRIAGE TRAY ASSEMBLY ADJUSTMENTS The carriage tray assembly is adjusted properly when 1 the tray is square to the knife edge and 2 the two adjusting screws in the transport assembly contact the drive studs in the tray arm simultaneously and 3 there is 090 to 125 clearance between three specific points on the edge of the carriage tray and the knife TO ADJUST WARNING UNPLUG UNIT BEFORE SERVICING 1 Check CARRIAGE TRANSPORT ASSEMBLY ADJUSTMENTS as outlined in this supplement Remo2. count switch 3LS on the forward stroke A Ifa slice count or weight other than zero was selected the slice count display decreases by one or the weight display increases by the weight of the slice NOTE This sequence begins with conditions as stated in Steps 1A thru 1F under MANUAL SEQUENCE OF OPERATION as outlined in this B Ifa slice count or weight was not selected supplement count display increases by one or weight display increases by weight of slice If the slice count reaches 99 it returns to zero on the next stroke and a beep will sound Carriage begins the return stroke A When the unit counts DOWN to zero slice count mode or weight is reached weigh 2 1CR locks through 1SW 4 1 1LS and slicer mode the motor speed is reduced as the control board carriage returns HOME The PRESET 3 Disol h i aka LED remains lit The preset cycle can be ee ell Ball 8 preset resumed by pushing Slice Pause switch indicator is off and speed LED S are lit again 4 ed 1SW 1SW 2 3 open 1SW NOTE The motor speed is reduced as the carriage ol returns HOME ensure the carriage does not coast Operator makes speed selection beyond the home position Operator turns manual automatic lever to 13 If the Slice Pause switch is operated anytime automatic position Normally open contacts of during the carriage stroke the carriage returns 26 and 3S close 120VAC applied to J3 5 thru home and stops 2S A 120 VAC N
3. kgs Range 1F00 2100 Ibs 4500 47FF kgs MODE Remove all weight from the scale platter NOTE All calibration parameters are stored at this point XXXX MODE Range OE00 1200 MODE Test complete Return to main menu MODE PRESSED Return to normal operation FOR TWO SECONDS NOTE Do the following to ensure proper operation of the scale Perform an increasing and decreasing load test CARRIAGE SIDE N Perform an overtravel load test by placing 6 Ibs on one of the corners indicated by a X and verifying that the platter stop does not touch the slicer base Repeat for the other corner PLATTER Page 11 of 24 MODEL 2912065 SLICER SERVICE PROCEDURES AND ADJUSTMENTS Configuration Programming CnF NOTE The following is a listing of the programmable features and the factory defaults Programmable Features e Weight unit Domestic LB Default or ounces International KG default or grams All units can select the four units described above at the Factory level however there will be two different display options One for kg g the other for Ib ounces e Motion indicator On Off On Dash out the display while in motion Off Continue showing weight e Auto zero ENABLE DISABLE Page 12 of 24 MODEL 291206 SLICER SERVICE PROCEDURES AND ADJUSTMENTS Configuration Programming oE HI g Log or 15 UP ARROW Toggle between Lb oE HI g and Select Lb oE HI g or Lo g weight
4. 34185B MANUAL SEQUENCE OF OPERATION Conditions Correct voltage is supplied to slicer Index knob is turned to O or above Carriage Interlock Switch 1LS closed Carriage Tray Assembly in the home position Home Start Switch 2LS closed On off Switch 1SW in OFF position Automatic Manual 25 36 Switch in manual position 2S contacts C NC closed Slicer plugged in 120VAC applied to 1SW 4 J3 10 Slicer Control Board 1CR 2 2CR 2 and J5 1 Scale Board Neutral applied J3 11 Slicer Control Board 1CR 0 2CR 0 J2 Motor Control Board and J5 5 Scale Board Operator pulls On Off switch 1SW to start position 120VAC applied to J3 9 J3 12 J3 8 J3 7 1CR energizes through pin J3 7 on slicer control board A 1PL lights and 1MTR knife motor is energized through 1CR 2 4 1CR locks through 1SW 4 1 1LS and slicer control board Display shows slice count or weight the preset indicator is off and 50660 LED S are lit Operator releases 1SW 1SW 2 3 open 1SW 4 1 stay closed Operator manually moves carriage transport assembly through one complete forward stroke passing slice count switch 3LS SDA oe Display increases by one slice count or weight of slice for each complete forward carriage stroke Operator returns carriage transport assembly to home position Page 20 of 24 oe SOY eo MODEL 291206 SLICER ELECTRICAL OPERATION AUTOMATIC SEQUENCE OF OPERATION 11 Carriage Transport Assembly passes the slice
5. Board and Automatic Drive Motor 765 a eee Page 2 of 24 Testing the Slicer Control Board Automatic Low high Speed Adjustment Carriage Transport Assembly Adjustments Interlock Switch Adjustment Carriage Tray Assembly Adjustments Scale Keypad and Cable Test ELECTRICAL OPERATION Component Function Manual Sequence of Operation Automatic Sequence of Operation Scale Board Information Wiring Diagram 000 eee TROUBLESHOOTING HOBART CORPORATION 1999 MODEL 2912706 SLICER GENERAL GENERAL OPERATION Refer to Instruction Manual F 34214 SPECIFICATIONS Electrical 120 60 1 Scale Capacity Capacity Increments Max Re zero at Rezero Tae Power Up KEY 0 060 0 150 1 000 0 010 TOOLS NOTE The special tools listed below are required in addition to those tools shown in Service Manual F 24569 02 98 Special Set of certified pound test weights TL No 77617 1 Set of certified kg test weights TL No 77617 26 Trimpot Tool Part Number 539123 for adjustment of automatic low high speeds Loctite Number 242 Part Number 520228 used on automatic motor mounting screws In lb Torque Wrench Combination Square RTV 732 Dow clear silicone Part Number 513886 3 for sealing scale keypad to bezel INTRODUCTION NOTE This is a supplement to Models 2612 2712 2812 and 2912 Servic
6. a 10 second interval Page 3 of 24 MODEL 291205 SLICER REMOVAL AND REPLACEMENT OF PARTS REMOVAL AND REPLACEMENT OF PARTS NOTE Many procedures state the carriage transport assembly should be moved to home position The carriage transport assembly is in home position when it is pulled all the way to the operator end of the slicer CAUTION Certain components in this system are subject to damage due to electrostatic discharge A Field Service Grounding kit is available to prevent this damage The Field Service Grounding kit must be used when any electronic boards or cables are handled _ UPPER BASE AND AUTOMATIC 9 F ma aa COMPONENT ACCESS ores aadel LOADCELL CONNECTION WARNING UNPLUG UNIT BEFORE SERVICING 1 Turn index knob to below 0 position fully clockwise 2 Move carriage transport assembly to home position 3 Remove CARRIAGE TRAY ASSEMBLY as outlined in the service manual 4 Remove KNIFE SHARPENER as outlined in the service manual 5 Remove platter and platter support assembly by lifting 6 Turn the slicer up and rest on the sharpener side of the automatic base ELECRICAL COVER ASSEMBY A Unscrew the upper right hand foot B Remove four screws to free automatic base from upper base and position automatic base as shown EE UL UPPER BASE AUTOMATIC BASE DY A ab X BOTTOM COVER 7 For components in the automatic base under the bottom cover
7. cover assembly 4 Disconnect the motor wires from J6 and J7 and continuity check the motor and motor wiring including the brushes A 4to 8 ohms is the normal range B Reconnect motor after continuity has been verified Page 14 of 24 MODEL 2912PS SLICER SERVICE PROCEDURES AND ADJUSTMENTS Press tortoise key until only one LED is lit low speed Press slice pause switch If motor is not running adjust low speed adjustment potentiometer clockwise until automatic motor runs Press and hold tortoise key for two seconds to access carriage strokes per minute mode all LEDS off Adjust low speed potentiometer until 16 strokes or 2 is displayed Press hare key until carriage speed is on high all soeed LEDS lit Adjust high speed potentiometer until 52 1 is displayed Press slice pause switch to halt carriage at home Place unit in manual and turn off Unplug unit Remove CARRIAGE TRAY ASSEMBLY as outlined in the service manual Turn the slicer up and rest it on the sharpener side of the automatic base Perform Step 1 of this procedure in reverse order Check unit for proper operation 8 10 11 12 13 14 15 16 17 18 19 20 AUTOMATIC LOW HIGH SPEED ADJUSTMENT WARNING UNPLUG UNIT BEFORE SERVICING UNIT NOTE The speed adjustment should be made with a cold automatic motor Use the trimpot tool to make potentiometer adjustments After each p
8. modes Lo g weight mode The OZ GR or LB KG indicator flashes to Default Factory will set to Lb for match the display and domestic HI g KG for indicate the active mode international MODE Saves setup and goes to the next step UP ARROW Toggle between Select display data or no bL Do not blank display data blank woen the platter is l In motion during motion DL Displays blank during motion Default no bL Do not blank MODE Saves setup and goes to the next step UP ARROW Toggle between Select auto zero mode no AO Auto zero OFF corn AO Auto zero ON Default AO Auto zero ON MODE Saves setup and goes to the next ma step done MODE Flashes Ser then return to main menu MODE PRESSED Return to normal operation FOR TWO SECONDS Page 13 of 24 MODEL 2912PS SLICER SERVICE PROCEDURES AND ADJUSTMENTS 5 Check for correct voltage to the slicer Turn the Index knob above 0 Turn on the Slicer Place Lever in automatic position Press and release the SLICE PAUSE switch Check for 120 VAC input at J2 and J1 of motor control board Te EE ED A If incorrect trace back to find the source of voltage loss B If voltage is present 1 Disconnect J3 from motor control board The automatic drive motor should run in low speed 2 Disconnect J3 and J4 short the connectors on the board The motor should run in high speed 11 If the motor does not run as stated
9. 1 Determine line voltage to unit 2 Perform UPPER BASE AND AUTOMATIC BASE COMPONENT ACCESS Steps 1 8 as outlined in this supplement 3 Place the connected electrical cover assembly in front of the automatic base SCALE BOARD 4 Plug the unit in Check for line voltage across J5 1 and J5 5 If incorrect correct before proceeding 6 Using TP3 as ground check for 5VDC at TP6 12VDC at TP4 and 5VDC at TP7 A If voltages test correctly continue to troubleshoot using Troubleshooting in this supplement B If voltages test incorrectly replace the board 7 HOBART iO p00 MACHINES DIV 7 RIG SOME BOARD COMPONENTS REMOVED FOR IN OTHER 8 4 POSITION Sul O w 0 9 5 4 i y gt NE 7 Unplug unit 8 Perform Step 2 in reverse order 9 Check unit for proper operation Page 9 of 24 MODEL 291205 SLICER SERVICE PROCEDURES AND ADJUSTMENTS SERVICE PROGRAMMING Programming Entry 1 With the slicer plugged in turned off and the manual automatic lever in automatic index knob above O pull and release start switch knob Wait for display 2 Press and hold mode and e keys at the same time for six seconds Display will show Prog then display CAL CnF or dlAg The information for service diagnostics dlAg has not been developed at this time NOTE Configuration CnF of the slicer must be done prior to calibration CAL of
10. AGRAM MODEL 2912PS SLICER ELECTRICAL OPERATION MODEL 291205 SLICER TROUBLESHOOTING TROUBLESHOOTING NOTE This troubleshooting covers those symptoms unique to the model 2912PS SYMPTOM POSSIBLE CAUSES Scale unit and slicer inoperative 1 Unit unplugged 2 Check main circuit breaker Display blank slicer operates 1 Scale keypad malfunction 2 Slicer control board inoperative 1 Platter not on platter support 2 Mechanical interference 3 0 30 lb 0 150 kg from zero 4 5 scale does not zero when powered up E 1 on display Loadcell inoperative Scale board inoperative E 2 on display 1 Unplug and re plug power cord If error continues A Scale board malfunction B Loadcell malfunction Scale operates slicer will not start Slicer not in home position Interlock switch 1LS open On Off switch 1SW malfunction Home start switch 2LS or magnet malfunction Relay 1CR inoperative Electronic start switch inoperative Capacitor malfunction Knife drive motor inoperative T 2 3 4 5 6 7 8 1 Capacitor malfunction 2 Knife drive motor malfunction 3 Relay 1CR inoperative 4 5 1 2 3 4 5 1 2 3 Scale operates slicer will start but does not continue to run Interlock switch 1LS malfunction slicer control board inoperative 0 11 Ib 0 060 kg from zero Platter not positioned correctly Platter stop scr
11. HOBART SERVICE MANUAL SUPPLEMENT MODEL 2912PS AUTOMATIC SLICER WITH PORTION SCALE ML 104833 This Service Manual Supplement should be used with Service Manual Form 24569 02 98 NOTICE This Manual is prepared for the use of trained Hobart Service Technicians and should not be used by those not properly qualified If you have attended a Hobart Service School for this product you may be qualified to perform all the procedures described in this manual This manual is not intended to be all encompassing If you have not attended a Hobart Service School for this product you should read in its entirety the repair procedure you wish to perform to determine if you have the necessary tools instruments and skills required to perform the procedure Procedures for which you do not have the necessary tools instruments and skills should be performed by a trained Hobart Service Technician Reproduction or other use of this Manual without the express written consent of Hobart Corporation is prohibited A product of HOBART CORPORATION TROY OHIO 45374 Form F 24653 June 1999 MODEL 2912706 SLICER GENERAL TABLE OF CONTENTS GENERAL RR RE EE RE EE ER OR RE OE RE OR RE OE EE OE EE EE OE OE OR RR RR ER 00 AR ARE ER ER RE EE OE EE RE N ER ER OE ER N ER RR RR 8 Meel EE EE RE OR 0030 EER EE ER RE RR ER N EE RR OE ER RE RR EN Fedtlles ER 0 00308000 752 0302028 58 50 00850 00 080000 0080800888 2808 0 00 0 ss cache A e
12. above replace motor control board and adjust as outlined in AUTOMATIC LOW HIGH SPEED ADJUSTMENT steps 3 and 5 thru 20 in this supplement TESTING THE SLICER CONTROL BOARD WARNING UNPLUG UNIT BEFORE SERVICING 1 Perform steps 1 3 and 5 9 of the THE MOTOR CONTROL BOARD AND AUTOMATIC DRIVE MOTOR TEST as outlined in this supplement NOTE 120 VAC REFERS TO THE HOT SIDE OF THE LINE VOLTAGE BLACK WIRE 2CR O ISA CONVENIENT PLACE TO ACCESS NEUTRAL 2 Check for 120 VAC at slicer control board J3 4 J3 5 J3 6 J3 7 J3 8 J3 9 and J3 12 NOTE J3 5 6 9 and J3 10 are inputs 3 If voltages are not present check the circuits associated with these terminals 4 If those circuits check OK replace slicer control board 5 Reassemble and check for proper operation THE MOTOR CONTROL BOARD AND AUTOMATIC DRIVE MOTOR TEST NOTE Due to the operating characteristics of the motor control board an open circuit or a no load condition at J6 and J7 may result in voltage readings which could lead the service technician to an incorrect conclusion WARNING UNPLUG UNIT BEFORE SERVICING 1 Perform UPPER BASE AND AUTOMATIC BASE COMPONENT ACCESS Steps 1 8 as outlined in this supplement 2 Place the connected electrical cover assembly in front of the automatic base 3 Carefully return the slicer to the upright position taking care to leave clearance between the automatic base and the electrical
13. arriage transport assembly in the home and locked tilted position INTERLOCK BAR Page 16 of 24 MODEL 291206 SLICER SERVICE PROCEDURES AND ADJUSTMENTS TO ADJUST Perform UPPER BASE AND AUTOMATIC BASE COMPONENT ACCESS steps 1 6 and 9 9B as outlined in this supplement Check CARRIAGE TRANSPORT ASSEMBLY ADJUSTMENTS as outlined in this supplement Adjust as necessary With the index knob fully clockwise and released back off the switch actuating screw in the interlock plate assembly and verify the screw has a locking patch on it If not Loctite No 242 part No 520228 must be applied to the threads prior to adjustment Move the transport assembly away from home position Slowly turn the switch actuating screw clockwise until the pivoting interlock plate just begins to lift from the recess in the cam A Slowly turn the actuating screw counterclockwise until the interlock plate is bottomed into the recess in the cam RECESS IN CAM Test the adjustment as outlined at the beginning of this procedure Check that turning the index knob to O or below 0 shuts the slicer off A If it does not adjust the GAUGE PLATE AND INDEXING KNOB as outlined in the service manual B Unplug slicer Reassemble in reverse order step 1 Check unit for proper operation To adjust the overturn screw within 005 maximum but with no interference with the transport roller bar 1 loosen the lock
14. ase If the directional arrow is not on the loadcell install with the strain gauge toward the slicer base Attach to the base using two screws and lockwashers Finger tighten screws STRAIN GAUGE IMBEDDED IN TOP OF LOADCELL CABLE TO STRAIN GAUGE ENTERS LOADCELL AT TOP gt aa LOADCELL STOP PLATE TSP1041C Page 7 of 24 MODEL 291206 SLICER SERVICE PROCEDURES AND ADJUSTMENTS SERVICE PROCEDURES AND ADJUSTMENTS WARNING CERTAIN PROCEDURES IN THIS SECTION REQUIRE ELECTRICAL TEST OR MEASUREMENTS WHILE POWER IS APPLIED TO THE MACHINE EXERCISE EXTREME CAUTION AT ALL TIMES IF TEST POINTS ARE NOT EASILY ACCESSIBLE DISCONNECT POWER ATTACH TEST EQUIPMENT AND REAPPLY POWER TO TEST CAUTION Certain components in this system are subject to damage due to electrostatic discharge A Field Service Grounding kit is available to prevent this damage The Field Service Grounding kit must be used when any electronic boards or cables are handled LOADCELL STOP PLATE PLATTER STOP ADJUSTMENT ADJUSTMENT 1 Plug the slicer in and allow to self zero WARNING UNPLUG UNIT BEFORE SERVICING 2 Remove the stainless steel platter but leave the platter support assembly in place 1 Access the loadcell by performing UPPER BASE AND AUTOMATIC BASE COMPONENT ACCESS Steps 1 7 and 9 9C 1 as outlined in this supplement 2 There should be a 025 to 030 gap betwee
15. carriage transport assembly away from the home position C Turn the interlock bar shaft until the interlock bar clearance to the edge of the lockout bar is 030 maximum but with no interference D Remove CARRIAGE TRAY ASSEMBLY as outlined in the service manual E Reinstall transport cover to transport 6 CARRIAGE TRANSPORT ASSEMBLY ADJUSTMENTS The carriage transport assembly is adjusted properly when 1 The interlock bar clears the bottom of the pivoting interlock plate assembly by 005 to 020 when in the locked position 2 The interlock bar clears the edge of the lockout bar during carriage movement by a maximum of 030 but with no interference 3 The overturn screw is within 005 maximum but no interference with the transport roller bar TRANSPORT ROLLER BAR INTERLOCK BAR SHAFT INTERLOCK BAR 0 EDGE OF LOCKOUT BAR FI 2 7 77 os Te BOTTOM OF PIVOTING INTERLOCK PLATE lo EE o TO ADJUST 1 These adjustments should be performed in the following order and all should be checked anytime an adjustment is made 2 WARNING UNPLUG UNIT BEFORE SERVICING 3 Perform UPPER BASE AND AUTOMATIC BASE COMPONENT ACCESS steps 1 6 and 9 9B as outlined in this supplement 4 Loosen the four screws holding the lockout bar to the base A Lift the lockout bar upward to its highest position and tighten the four screws 5 To adjust the interlock bar clearance A Position the c
16. dad SAS AS ASASRAAA EE ER RR N RR N LAAT TAS ANS SPCCIICANONS 24548 0000030303 ER KO EF EE aed ec RARR 0200080090 580350280 5880880082 0580080208 0880880880 0889208 SCAS GADAC RR 2 OS SS DE DES DS lisie ARE 0 0 0 000000 0000000053 0000000000 00 000000 000000 0000802 20 030005904 0888808008 SAAS AAAS RE EI EO EE REMOVAL AND REPLACEMENT OF PARTS Upper Base and Automatic Base Component AcceSS 0 scale Keypad or Bezel ist 200 gt 24000 SA SEE SO 0008900820 3058000050 8908002985 88 0 2 EE sad see eie ES MAAR 04 0000005080 0000050089 2008 2030802905 0880892985 8804 2 Slicer Control Board 22202 22 2000 2000020 002020020 0800908050 0350202808 9 EE EE EE SR Motor Control 0 gt 2202 02 22 002 02002002 05 0005020000 2200505080 0909040053 200094298 FR 6 56 BOA 222204 02202 00000 0003020002 020020800 0808050033 202390898 2 2 Loadcell MERE REEN N SERVICE PROCEDURES AND ADJUSTMENTS 0 0 00 cc eee ees Loadcell Stop Plate Adjustment 2 aaa Platter eon aes jie 022 020 00 002 00 GEWERE DEE 00 0000 00 GE DE REKE DE EG Ge Scale Board Test Ese Service Programming Programming Entry Programming Exit Main Menu EE se Calibration of Loadcell Cal Lbs Or Kgs 0 EES ES ES ee eee ees Configuration Programming CnF The Motor Control
17. e Manual F 24569 02 98 Model 2912PS Automatic Slicer with Portion Scale that displays the weight or slice count Six preset values can be programmed with weight or slice count The scale display can Tare to indicate Net Weight but is NOT LEGAL FOR TRADE Features Knife Home start The knife motor will not start unless the carriage unit is at the indexing knob end of the slicer Home Position Poly V Belt driven knife Interlock Switch Prevents the continuous operation of the knife motor when the index knob is below 0 Carriage interlock The gauge plate cannot be opened if the carriage unit is not installed onto the unit No voltage release Requires the slicer to be manually re started after a power interruption Portion Scale Portion control with weight and count with display Carriage Tray Assembly with Two Handles Sharpener Housing Mount Base and Tray Support Assembly They have an anodized finish Cleaning Lift lever on side Automatic Home Return When user defined preset weight or slice count is reached carriage will stop at the home position Carriage Speeds Automatic Mode Six carriage speeds Carriage Home Start The automatic drive motor will not start unless the carriage unit is at the operator end of the slicer home position Automatic shut off If enabled slicer will turn off in manual mode only if a keystroke or full stroke of the carriage has not been made within
18. eutral at J3 3 from slicer control board 7 Operator enters a slice count or weight if desired The PRESET LED lights 8 Operator presses slice pause switch Slicer Control Board switches to the automatic mode 9 2CR energized through 1SW 2LS 25 J3 5 J3 3 and 3S A 2CR 2 4 close 120VAC through 2CB A B to J1 on motor control board 10 Motor control board energizes 2MTR 12 Operator pulls On Off switch 1SW to start position 120VAC applied to J3 9 J3 12 J3 8 J3 7 1CR energizes through pin J3 7 on slicer control board A 1PL lights and 1MTR knife motor is energized through 1CR 2 4 Automatic Drive Motor Automatic Carrier Assembly moves and engages pawl on Carriage Transport Assembly Page 21 of 24 1 MODEL 291205 SLICER ELECTRICAL OPERATION SCALE BOARD INFORMATION See Scale Board Test in this supplement for voltage checks ZN HORART iO p FOOD MACHINES DIY NZZ R10 IS COMPONENTS 230V REMOVED FOR IN OTHER POSITION IS O o O 4 Page 22 of 24 Page 23 of 24 Ba uo TNS 5 4 DIe 9 4 cs Seri cS 68 8 f1 858 184 031 NI LESY 0180 AOL 43JI7S Sd cl c 2009 05 1 WAMOYIG 1 1 3009 37809717448 10 O GNO 3102 0112313 1 JHL 4119 15 SNOT 181 10 1 WIRING DI
19. ews not adjusted properly Scale board malfunction Loadcell inoperative Display not functional scale keypad malfunction Display cable inoperative Slicer control board malfunction Scale does not weigh correctly Press 0 key to re zero scale Platter not positioned correctly Platter binding Platter stop screws not adjusted properly Loadcell out of calibration Cannot re zero scale T 2 3 4 5 6 Loadcell loose 7 Loadcell inoperative 8 Scale board malfunction T 2 3 4 5 6 7 Circuit breaker 2CB tripped Automatic Manual switch 2S 3S inoperative Relay 2CR malfunction Motor control board malfunction Slicer control board malfunction Automatic drive motor 2MTR will not start knife motor running Scale keypad malfunction Automatic drive motor 2MTR inoperative Auto Starts then stops when it leaves home position 1 2CR inoperative 2 Slicer Control Board malfunction No counting of slices Slice switch ALS malfunction Slicer sts EE malfunction No counting of slices automatic drive motor won t stop 1 Slice switch 3LS malfunction when slice pause switch pressed automatic operation 2 Slicer control board malfunction Up Down arrow for speed selection pressed next led does 1 Scale keypad malfunction not light Beeper on continuously 1 Slicer Control Board malfunction Form 24653 June 1999 Printed in U S A
20. n the loadcell and the top of the loadcell stop plate with O weight on the platter 3 Add or remove shims until correct NOTE Only use shims listed in Parts Catalog 4 EG PLATTER STOP SCREWS ee GN No rove SHIM HERE 3 Place 8 Ibs 3 6 kg on one of the corners LOADCELL AS REQUIRED i STOP TSPTOAOC where a platter stop screw is located on the platter support assembly 4 Reassemble in reverse order step 1 of this 4 Remove the RTV on top of the platter stop procedure screw and turn the screw until it touches the 5 Check the scale for accuracy slicer base Watch the display for the weight to decrease this indicates that the screw 5 touching the slicer base 5 Back the screw out a little at a time until the display stops changing 6 Turn the stop screw 1 turn counterclockwise PLACE WEIGHT AT CORNER OF PLATTER SUPPORT ASSEMBLY PLATTER STOP SLICER BASE 7 MOTOR HOUSING TSP1037C 7 Move the 8 lbs 3 6 kg to the other corner with a platter stop screw and repeat steps 5 8 Remove the weight Apply RTV to the top of the two screws and smooth the surface 10 Install the stainless steel platter on the platter support assembly Page 8 of 24 MODEL 291205 SLICER SERVICE PROCEDURES AND ADJUSTMENTS SCALE BOARD TEST WARNING UNPLUG UNIT BEFORE SERVICING
21. nut and turn the overturn screw to obtain the proper clearance CARRIAGE TRANSPORT 3 ASSEMBLY 005 MAXIMUM NO gt INTERFERENCE TRANSPORT ROLLER BAR OVERTURN VIEW FROM SWITCH END F Tighten the locknut 7 Using key plate tool move the carriage transport assembly out of the interlocked position and move back and forth its full travel placing it in and out of the interlocked position checking for proper movement and interlocking Reassemble in reverse order step 3 Check CARRIAGE TRAY ASSEMBLY ADJUSTMENTS as outlined in this supplement 10 Check unit for proper operation INTERLOCK SWITCH ADJUSTMENT NOTE The slicer must shut off with the carriage tray assembly at the home position and tilted outward To test place the carriage tray assembly at the home position and tilt the carriage tray outward Put a slight counterclockwise pressure on the index knob attempting to open gauge plate and pull the ON OFF START switch knob to the Start position Release the switch to the Run position while still 6 applying pressure to index knob If the slicer continues to run release the pressure on the index 2 knob The slicer must shut off WARNING CERTAIN PROCEDURES IN THIS SECTION REQUIRE ELECTRICAL TESTS OR MEASUREMENTS WHILE POWER IS APPLIED TO THE MACHINE EXERCISE EXTREME CAUTION AT ALL TIMES IF TEST POINTS ARE 8 NOT EASILY ACCESSIBLE DISCONNECT 9
22. of bezel A Apply RTV 732 Dow clear silicone to keypad mounting surface When installing the new keypad remove protective paper from over buzzer and backing from perimeter of keypad Reassemble in reverse order Check unit for proper operation 4 2 Kg ES 10 11 12 C For components behind the upper electrical cover remove five screws 1 Pull cover on an angle away from the on off switch outward and upward for removal 10 Reassemble in reverse order 11 Check unit for proper operation SCALE KEYPAD OR BEZEL NOTE When replacing the bezel a new scale keypad must be installed WARNING UNPLUG UNIT BEFORE SERVICING 1 Perform UPPER BASE AND AUTOMATIC BASE COMPONENT ACCESS Steps 1 7 and 9 9B as outlined in this supplement 2 Disconnect motor wires in speed selector switch cavity and pull them from half grommet 3 Loosen screw in motor crank link assembly MOTOR gt gt T SHAFT MOTOR DRIVE LINK CREW ETA S Fl eee ASSEMBLY 0 0 MOTOR CRANK LINK LINK ASSEMBLY 1108 2649 Page 5of 24 MODEL 291205 SLICER REMOVAL AND REPLACEMENT OF PARTS MOTOR CONTROL BOARD WARNING UNPLUG UNIT BEFORE SERVICING 1 Perform UPPER BASE AND AUTOMATIC BASE COMPONENT ACCESS Steps 1 8 as outlined in this supplement 2 Place the connected electrical cover assembly in front of the automatic base MOTOR CONTROL BOARD 3 Note the location
23. of the wires and disconnect them 4 Remove the mounting hardware to free the board from the electrical cover assembly Reinstall the board and connect the wires Perform AUTOMATIC LOW HIGH SPEED ADJUSTMENT as outlined in this supplement beginning at Step 3 SCALE BOARD WARNING UNPLUG UNIT BEFORE SERVICING 1 Remove SLICER CONTROL BOARD as outlined in this supplement 2 Disconnect 02 Ja and J5 from board SLICE SWITCH 3LS WARNING UNPLUG UNIT BEFORE SERVICING 1 Perform UPPER BASE AND AUTOMATIC BASE COMPONENT ACCESS Steps 1 7 and 9 9C 1 as outlined in this supplement 2 Remove three screws to free switch bracket from base 3 Remove two screws nuts and lockwashers to free switch from switch bracket 4 Remove P clamp 5 Note location of switch wires cut wire tie s and disconnect wires 6 Reassemble in reverse order 7 Check unit for proper operation SLICER CONTROL BOARD WARNING UNPLUG UNIT BEFORE SERVICING 1 Perform UPPER BASE AND AUTOMATIC BASE COMPONENT ACCESS Steps 1 6 and 8 as outlined in this supplement Disconnect J1 J2 and J3 from board Remove six nuts and washers Lift board from standoffs Reassemble in reverse order Check unit for proper operation ae 9 Page 6 of 24 MODEL 291206 SLICER REMOVAL AND REPLACEMENT OF PARTS Place the platter support assembly into the humpnut loadcell hole in the base A Adjust the p
24. osition of the loadcell until the platter support assembly is centered in the humpnut hole B While holding the loadcell in place tighten the mounting screws to 50 65 in lbs 2 SLICER BASE PLATTER SUPPORT Noes SUPPORT MUST NOT CONTACT HUMP NUT TSP1039C Adjust the loadcell stop plate as outlined in SERVICE PROCEDURES AND ADJUSTMENTS LOADCELL STOP PLATE ADJUSTMENT this supplement Reassemble in reverse order step 1 of this procedure Calibrate loadcell as outlined in SERVICE PROCEDURES AND ADJUSTMENTS CALIBRATION OF LOADCELL this supplement Check unit for proper operation 3 Remove three standoffs three nuts and 4 washers A Lift board from standoffs B Remove two standoffs from board transformer and save NOTE Check that the voltage selector switch SW3 on the replacement board is set for 115 volts 5 Calibrate the loadcell as outlined in SERVICE PROCEDURES AND ADJUSTMENTS CALIBRATION OF LOADCELL this supplement S 4 Reassemble in reverse order P HUMP NUT PLATTER SUPPORT 4 a ASSEMBLY 6 Check unit for proper operation LOADCELL WARNING UNPLUG UNIT BEFORE SERVICING 1 Perform UPPER BASE AND AUTOMATIC 7 BASE COMPONENT ACCESS Steps 1 7 and 9 9C 1 as outlined in this supplement 2 Remove the two screws and lockwashers holding loadcell to the base 8 3 The directional arrow on the loadcell must point down away from the slicer b
25. otentiometer adjustment on the motor control board the carriage assembly must cycle three complete strokes before the accurate adjusted strokes per minute are displayed Turn the potentiometer clockwise for higher number of strokes counterclockwise for a lower number LOW SPEED ADJUSTMENT 1 Perform UPPER BASE AND AUTOMATIC BASE COMPONENT ACCESS Steps 1 8 as outlined in this supplement 2 Place the connected electrical cover assembly in front of the automatic base Reinstall feet Carefully return the slicer to the upright position taking care to leave clearance between the automatic base and the electrical cover assembly as outlined in the service manual Plug unit in Turn unit on and place in automatic Page 15 of 24 MODEL 291206 SLICER SERVICE PROCEDURES AND ADJUSTMENTS B Loosen the allen screw holding the roller bearing assembly to the carriage transport assembly using the special Allen wrench C Turn the adjusting screw until the interlock bar clears the bottom of the pivoting interlock plate assembly by 005 to 020 and tighten the allen screw To adjust the interlock bar clearance A Remove two screws holding transport cover to transport INTERLOCK BAR 030 CLEARANCE MAXIMUM BUT WITH NO INTERFERENCE EDGE OF LOCKOUT BAR B Install CARRIAGE TRAY ASSEMBLY as outlined in the service manual which moves the interlock bar to the operating position and move the
26. the loadcell Programming Exit Exit the service programming mode by pressing the mode key again for two seconds Main Menu MODE 00000 Step to Next Function CnF Entry to functions Stan o CAL then execute loadcell Entr ed y to calibration Calibration oe calibration MODE PRESSED FOR Return to normal operation Exit from programming TWO SECONDS CnF UP ARROW CnF then enter setup function Entry to setup Stands for Configuration MODE Step to Next Function dlAg MODE PRESSED FOR Return to normal operation Exit from programming EE SECONDS dlAg KX xx Stands for Service MODE SEr Dis played then back to CAL Diagnostics Display MODE PRESSED FOR Return to normal operation Exit from programming TWO SECONDS Page 10 of 24 MODEL 291206 SLICER SERVICE PROCEDURES AND ADJUSTMENTS Calibration of Loadcell Cal Lbs Or Kgs NOTE If a displayed number does not fall within the range the loadcell cannot be calibrated until the problem is corrected NOTE Remove all weight from scale platter before calibration of loadcell Calibration of Loadcell rd key 8 00 Ibs or 3 600 kgs MODE Remove all weight from the scale platter MODE Range OEOO 1200 Ibs or kgs MODE Place weight 1 Ib or 1 kg on the platter Range 1 00 2100 Ibs 4500 47FF kgs 6 00 Ibs Place weight 6 0 Ibs or 3 2 kgs on the scale platter or 3 2 kgs Range 1 00 2100 Ibs 4500 47FF
27. the proper connector pin number NOTE When the slice pause switch is pressed there should be continuity at pins 9 and 10 o Oo in LL 0 0 0 SLICER TSP1379C 5 Reassemble in reverse order step 1 6 Check unit for proper operation Page 19 of 24 MODEL 291206 SLICER ELECTRICAL OPERATION ELECTRICAL OPERATION COMPONENT FUNCTION Used measure the weight of the product on the platter NOTE Works like a group of variable resistors The resistance varies by the amount of strain that is put on the loadcell Scale Board Takes the signal developed through the loadcell and converts it to a signal that is displayed Contains the transformer for converting 115 VAC to needed voltages Scale Keypad Indicates weight on the platter slice count and information in the service mode In normal operation digits will go blank after 5 minutes if not used but LED annunciators and decimal point will remain lit Six LEDS indicate Carriage speed selected Slice Switch 3LS Monitors carriage tray movement for slice count and auto shutoff feature Slicer Control Board Monitors conditions and controls operation of components Automatic Manual Switch 3S Controls mode of operation NOTE 120 VAC REFERS TO THE HOT SIDE OF THE LINE VOLTAGE BLACK WIRE The following examples are based on a model 2912PS 120 60 1 Wiring Diagram F
28. unscrew lower feet remove ten screws around outline of cover and pull cover from automatic base 8 For components in the automatic base on the electrical cover assembly remove eight screws and carefully pull assembly outward to access wiring connections Page 4 of 24 MODEL 291205 SLICER REMOVAL AND REPLACEMENT OF PARTS NOTE When reinstalling place the motor crank link nearly flush with the end of the output shaft but maintain clearance between back of link and the automatic base Tighten the screw to 90 3 inch pounds Remove retaining ring where motor drive link assembly is attached to the main link assembly A Pull motor crank link motor drive link assemblies from main link assembly and automatic motor shaft Remove four screws and pull automatic motor from base NOTE When installing the automatic motor mounting screws use Loctite No 242 and torque to 25 3 inch pounds SCREWS Remove two screws holding automatic manual switch mounting bracket to automatic base and move out of the way to access slice count bezel mounting screws Remove six screws holding bezel and gasket to automatic base and carefully pull outward to access keypad cable A Disconnect cable from keypad Remove six nuts and lockwashers holding keypad to bezel Te P 0 1 cd af LAY EIA NUTS AND LOCKWASHERS N A Press keypad from bezel using your hands Clean RTV from keypad mounting surface
29. ve the knife cover Securely attach the carriage tray assembly to the transport assembly 5 4 Check the squareness of the carriage tray to the knife A To adjust the squareness 1 Rotate the adjusting screws in the transport as needed to square the arm Lock in place using the jam nuts Page 18 of 24 MODEL 2912PS SLICER SERVICE PROCEDURES AND ADJUSTMENTS Loosen the four nuts screws on earlier units on the carriage tray Apply Loctite 242 to the carriage tray studs on the newer units Move the tray to achieve the 090 to 125 clearance Torque the four nuts to 80 in Ibs or tighten the screws Recheck the gap after tightening 1 6 Confirm that the gap MEASURED IN STEP 5A 5B AND 5C at points 1 2 and 3 are BETWEEN 090 AND 125 A To adjust the gap NOTE Anytime the earlier version tray assembly is split from the tray support RTV 732 must be reapplied to seal the two assemblies together SCALE KEYPAD AND CABLE TEST NOTE When an individual keypad button is pressed for a continuity test a reading of 100 ohms or less is acceptable WARNING UNPLUG UNIT BEFORE SERVICING 1 Perform UPPER BASE AND AUTOMATIC BASE COMPONENT ACCESS steps 1 6 and 8 as outlined in this supplement Disconnect cable at J2 on the slicer control board Place a probe at pin 1 or 3 or 5 on the display cable connector Test each individual keypad button by pressing and taking a continuity reading at
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