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MicroTymp 2 Service Manual

1. 5 ares CORMECTED amp REVO HEG DE 5 S PLUS JS S 4 dro 09109 Seger PEDER E De OUTS for em SIAL EDIT CEES ICEL ISSO EELS FSS pe SS SS ERS TITT U V E93 2 00000 os 825 oiz 130 eT Or Cire Or 119 R2 OR Frio O Fiva jau BREAKOUT TABS TO FLUSH TO BELOw EDGE OF BOARD OF WITHIN 24 J3 amp J4 SHALL BE FLUSH TO SURFACE AND PARALLEL TO EDGE 4 OT ION Ar SPECIFIES TEST POINT ONLY 9 ASSEMBLY TO CONFORM TO ANSI IPC A 610 CLASS II ACCEPTABLE TRIM LEAD TO 100 MAX ON ITEM Ji STANDARDS UNLESS OTHERWISE SPECIFIED OD N SILOER OR FLUX ALLOWED BEYOND THIS LINE RUBER REVISION LEVEL DATE ED SEE TEM 4 NOTE POLARITY ORIENTATION LOCATE AS SHOWN SENTER AREE 4 SO NOT TO TOUCH COMPONENTS TOOLING HOLES OF COMPONENT SE Bon STRIPED OO TA NER CIROLED AREA 11 ALL ASSEMBLIES SHALL BE TESTED PER THE TEST SPECIFICATION 9 PLUS ON ITEM 7 TO BE COMPLETELY VISABLE AFTER PLACEMENT OF r TEST ORT OM TEST CARR ING SHALE BE PROVIDED WITH EACH ASSEMBLY ITEM 6 BATTERY COMPARTMENT ONTO ITEM a D
2. 711700 smak FS Ps ESTE NOTES m 14 AT THE CONCLUSION OF MANUFACTURE AND BEFORE SHIPMENT EACH UNIT SHALL BE SUBJECTED TO THE FOLLOWING WELCH ALL YN SPECIFICATIONS DIELECTRIC STRENGTH TEST 0 67 UL CSA 1 ONLY 400178 1 ONLY B LEAKAGE CURRENT 0171 GROUNDING CONTINUITY TEST A02242 ITEM 5 CABLE BE ASSEMBLED WITHOUT TWISTING ROUTE AS SHOWN TORQUE SCREWS TO 3 TO 4 IN 18 A TORQUE ITEM 14 0 5 7 IN OZ OR HAND TIGHT 9 s APPLY ADDITIONAL GAR CODE LABELS 1 15 MANUFACTURING INSTRUCTIONS 1222240 ER SSS ROEN MICROTYMP 2 PRINTER CHARBER 0 CORD OR TAB CE MICROTYMP 2 PRINTER RER DOMESTIC VERSION CORD TASI MICROTYMP 2 PRINTER CHARGER w 0 CORD OR TAG MICROTYWP 2 PRINTER CHARGER Ha SG xg PE VERSION CORD DESCRIPTION eles a SE 0 9 2 TED CHECKED TOLEPANCES TITLE SECTION PRINTER CHARGER ASSEMBLY 41 5 1 3 Bed i SUPPLY BOAHD LCD BOARD 2 i iM i BATTERY 1 HARDWARE CHARG ING BATTERY DETECTION I AT OT I L I BA
3. Ri 125 B B g DOE 59 co 668 I BBB d dB B e 8 O RIO 8105 RIG Rize R22F7 R5 CIZ ox os RIT css c22 06 t UNS omgis Bl EA NOTES 1 BREAKOUT TABS TO BE FLUSH TO BELOW EDGE OF BOARD 7 ASSEMBLY TO CONFORM TO ANSI IPC A 610 CLASS 11 ACCEPTABLE STANDARDS UNLESS OTHERWISE SPECIFIED 2 SEE FOR POPULATION TP SPECIFIES TEST POINT ONLY FID SPECIFIES FIDUCIAL MARK ONLY ALL ASSEMBLIES SMALL BE TESTED PER THE TEST SPECIFICATION TEST REPORT OR TEST MARKING SHALL PROVIDED WITH EACH ASSEMBLY AFTER SUCCESSFUL TEST ORIENT PART BY INNER NOTCH ONLY COMPLETION POLAR US REQUIRE PROGRAMMING PRIOR TO ASSEMBLY WHEN PROGRAMMED U4 amp L5 A mre TIN ZORIENT ATION LOCATE AS SHOWN BE PERMANENTLY MARKED SURFACE WITH WELCH ALLYN COMPONENT PART 5 DO NOT WASH PCB ASSEMBLY AFTER POPULATION 1501 MEMBER OR SUE TVAE VERSION OG i0 ASSEMBLY SHALL BE LABELED WITH WELCH ALLYN ASSEMBLY PART SHALL BE ARA NUMBER REVISJON d te bee r 5 z IN sa TO FEB SURFACE AND BE CENTER LABEL ITEM 2 SO NOT TO TOUCH COMPONENTS TOOLING HOLES OR DVERHANG BOARD 8 7 8 T 5 E 3 1 rv ____ Dun aner Gave ro meo enw
4. Description This error results from the RAM memory inside the Master microcontroller testing bad This memory is used to temporarily store program information while the Master is operating Suggestions Replace the Master microcontroller or MCU PCB clear the error registers power down the unit and re test the unit 541 5 1 1 5 1 2 5 2 5 2 1 5 2 2 5 3 5 3 1 5 3 2 NEEDS CAL With Both Error Registers 00 There are three error cases in which NEEDS CAL is displayed on the LCD screen but no error is indicated in either the Historical Master Error Register or the Historical Slave Error Register They are as follows Unit Not Calibrated 00 00000000 Description This error occurs when the proper calibration signature fa ce is not written in EEPROM locations 2e and 2f respectively Suggestions Verify that fa ce is indeed at locations 2e 2f Calibrate the unit power down then re test Slave Communications Error 00 00000000 Description This error occurs when the Slave doesn t respond to the Master s commands within pre defined time period Suggestions Verify that the Slave and Master microcontrollers are properly installed by powering down and then powering up Verify that both microcontrollers pins all make good electrical contact to the PCB I2C Bus Error 00 00000000 Description The I2C bus is a two wire communication link between the Slave Mas
5. BLACKMAX 10 23641 REPAIR M30399 LOCTITE 712 ACCELERATOR o CAP 33UF 20 1206 Z5U 50V TR 2 MT 2 Printer Charger Repair Parts 71171 REPAIR POLY BAG 11 x 14 x 1 1 2 1 71171 REPAIR PARTS LABEL 0 71171 REPAIR 71171 REPAIR 1 71171 REPAIR MICROTYMP 2 SERVICE MANUAL 1 71171 REPAIR CONTACT HOUSING ASSY 1 71171 REPAIR PRINTER KEYBOARD LED S ASSY 1 71171 REPAIR PRINTER CHARGER BASE ASSY 1 71171 REPAIR 2 71171 REPAIR 71171 REPAIR JUMPER WIRE ASSY BLUE 1 71171 REPAIR JUMPER WIRE ASSY BROWN 1 71171 REPAIR 1 LABEL CE BRIDGE RECTIFIER 1 DIODE 50V 1 IC MCU 28 PIN iC MCU 44 PIN i GROUNDING PLATE 1 1 71171 REPAIR 236656 275 MOV 225 NOTE This fuse for 508 and earlier PCB only 2 DRAWINGS NOS 236300 236302 236304 236305 236308 236330 236340 711700 MICRO TYMP 2 HARDWARE BLOCK DIAGRAM J 21 x iE c iw C le PET nej 9l FJ see NOTES N ITEM 6 TO BE TIGHTENED TO A TORQUE OF 2 0 ITEMS 5 AND 4 TO BE TIGHTENED TO A TORQUE OF 1 5 2 0 IN LB B 5 APPLY ADDITIONAL BAR CODE LABELS ITEM 15 PER MANUFACTURING INSTRUCTIONS 2 5 IN LB moor 11 asse _
6. Release black button Current will fall to 135 mA 25 mA 6 4 If readings are normal calibrate with Calvin equipment Preliminary Bench Test for MicroTymp 2 23641 continued 7 Calvin Calibration for Needs Cal 7 1 Select Main Menu option 42 Calibration Tools ENTER 7 2 Select Tools Menu option 1 2 2 Prom Editor ENTER 7 3 Wait 5 seconds for CALVIN to display PROM REGISTER Observe data in registers 2E and 2F 2E should read FA 2F should read CE 7 4 If data varies from above enter correct data in by moving the cursor to register 2E and typing in FA Do not press enter The cursor will automatically go to position 2F Then type in CE Do not press enter Note The entered data causes those locations to turn yellow 7 5 Observe registers AC AD AE They should read 00 no data Data may be present if unit had a NEEDS CAL message 7 6 Erase any data in these registers by moving the cursor to each register and typing in 00 Data will turn yellow Press ENTER after AC AD and AE data is erased 7 7 Unit will Update registers then Tools Menu will be automatically displayed 7 8 Remove MT2 handle from Calvin and install fully charged battery 7 9 2 will display OPEN message working mode 7 10 NEEDS CAL message re appears there is hard failure Perform troubleshooting for failed component s Two common causes of NEEDS CAL e
7. tion of the PROM with default values being loaded Recalibration will preserve impor tant usage count information kept in the PROM Get Handle Serial Number If this is a new unit a prompt will appear requesting the serial number This serial number is bar coded directly on the handle The serial number can be typed in by hand or scanned in Errors Correction Invalid serial number Reenter serial number Handle Self Test This step insures that the handle microcontrollers are operating properly and all memory is functional including ROM RAM and PROM test command will be sent to the handle which causes the RAM and ROM for both microcontrollers to be tested and the results returned If this test passes a test PROM command is sent This causes the handle to thoroughly test I7E27PROM Any errors at this stage are enough to prevent calibration Though the slave is capable of detected additional types of errors they are ignored since the handle is out of calibration Errors Corrections Master ROM failure Bad Master microcontroller Master RAM failure Bad Master microcontroller Slave ROM failure Bad Slave microcontroller Slave RAM failure Bad Slave microcontroller PROM failure Bad Leak Rate Test The operator is instructed to place the pressure tube on the end of the handle tip Pres sure is set to a positive pressure and the pressure is read After a time delay the pres sure is reread and the
8. 11101100 67 43 01000011 152 98 10011000 237 ed 11101101 68 44 01000100 153 99 10011001 238 ee 11101110 69 45 01000101 154 9a 10011010 239 ef 11101111 70 46 01000110 155 9b 10011011 240 50 11110000 71 547 01000111 156 9c 10011100 241 f1 11110001 72 48 01001000 157 9d 10011101 242 f2 11110010 73 49 01001001 158 9e 10011110 243 f3 11110011 74 4a 01001010 159 9f 10011111 244 f4 11110100 75 4b 01001011 160 a0 10100000 245 f5 11110101 76 4c 01001100 161 581 10100001 246 f6 11110110 77 4d 01001101 162 a2 10100010 247 5 7 11110111 78 54 01001110 163 a3 10100011 248 548 11111000 79 4f 01001111 164 4 10100100 249 59 11111001 80 550 01010000 165 a5 10100101 250 fa 11111010 81 51 01010001 166 a6 10100110 251 fb 11111011 82 52 01010010 167 a7 10100111 252 11111100 83 53 01010011 168 a8 10101000 253 fd 11111101 84 54 01010100 169 a9 10101001 254 fe 11111110 255 Sff 11111111 2 How to Determine the Error Each error register can be assigned any one of the 256 possible hex numbers listed above Each number represents specific combination of errors By converting the HEX number the error register to its binary equivalent and using the error code tables below you will be able to determine what errors caused the unit to display the NEEDS CAL message Notice that the binary numbers actually contain eight individual numbers that are either 0 or 1 These eight numbers correspond to the eight blocks of
9. 71171 71172 71174 71176 71179 Micro Tymp 2 Printer Charger Tests NORMAL MAINTENANCE BATTERY COVER BATTERY RECHARGING BATTERY RECYCLING THE USED BATTERY A 1 REFER TO PAGE C 43 THROUGH C 47 OF MICROTYMP 2 OPERATING INSTRUCTIONS FOR REPLACEMENT OF BATTERY PN72900 WARNING INSERT BATTERY ONLY AS SHOWN IN THE OWNERS MANUAL FAILURE TO OBSERVE CORRECT POLARITY COULD CAUSE DAMAGE TO THE MICRO TYMP 2 WHEN IT IS NECESSARY RE PLACE THE BATTERY USE ONLY A WELCH ALLYN PN72900 REPLACE MENT BATTERY OTHER NON APPROVED BATTERIES MAY CAUSE RISK OF FIRE OR PRODUCT FAILURE CAUTION The battery must be removed if the MicroTymp 2 is to be stored or placed anywhere other than in the Charging Stand or connected to the Charging Transformer for more than one month Failure to do this can result in damage to BOTH the battery and the MicroTymp 2 A 2 FOLLOW THIS PROCEDURE FOR DECIDING WHEN TO REPLACE THE NI CAD BATTERY IN A MICRO TYMP HANDLE AS ALWAYS READ THE CUSTOMER COMPLAINT FIRST SCENARIO 1 If the unit FUNCTIONS the battery has held sufficient charge during approximately two days transit the battery meets requirements No corrective action is to be taken However it is good practice to put the battery on charge for however long it is in your possession OR SCENARIO2 unit DOES NOT FUNCTION AND the battery is IN warranty put in a fully charged new battery your test battery If the unit functions and Low Bat
10. have determined what error was responsible for causing the NEEDS CAL to be dis played you must determine why This is done by looking up the particular error in the following section Possible causes will be listed next to the error in addition to suggestions of areas to further investigate 3 Historical Slave Error Register This register indicates any error that occurred in the Slave microcontroller during operation The Slave is responsible for the pressure sub system of the MicroTymp 2 This include the operation of the pump amp motor valve and pressure transducer It receives commands from the Master microcontroller to perform the task such as pressure up pressure down open close valve read pressure transducer etc The errors that can occur in the Slave are listed below 3 1 3 1 1 3 1 2 3 2 3 2 1 3 2 2 3 3 3 3 1 3 3 2 3 4 3 4 1 ROM Error 80 IXXXXXXX Description This error results from the ROM memory inside the Slave microcontroller testing bad This memory is used to store the actual program that runs on the Slave Suggestions Replace the Slave microcontroller or MCU PCB clear the error registers power down the unit and re test the unit RAM Error 40 Description This errorresults from the RAM memory inside the Slave microcontroller testing bad This memory is used to temporarily store program information while the Slave is operating Suggestions Replace the Slave microcon
11. numerical sequence When Performed Before recalibration Required Equipment Welch Allyn Calvin Recalibration system Digital Volt Ohm meter Pressure Box T 5657 or equivalent pressure source 400 dPa max with 1 dPa resolution on digital display fully charged battery Test 1 Leaks 1 1 Open 2 and remove battery 1 2 Momentarily apply 7 2 VDC across coil to latch valve closed See FIG 1 2 for polarity 1 3 Connect Pressure Box T 5657 pressure tube to MT2 probe tip while valve is latched closed 1 4 Adjust pressure of T 5657 to 200 dPa and observe leak rate Must leak less than 10 dPa in 5 seconds 1 5 Throw Pressure Vent switch to V vent 1 6 Throw Select switch to Negative This will cause meter to read positive with negative pressure 1 7 Throw Pressure Vent switch to Pressure 1 8 Adjust pressure of T 5657 down to 400 dPa and observe leak rate Must leak less than 10 dPa in 5 seconds Apply 7 2 Volts D C momentarily to close valve Valve will latch and hold closed position 7 2V Probe end Empty Battery compartment Figure 1 2 Closing Valve for leak check procedure Preliminary Bench Test for 2 23641 continued Test 2 Vent Rate 2 1 Momentarily apply 7 2 VDC across valve coil with reverse polarity to open unlatch valve See FIG 2 1 for polarity This will vent 400 dPa from step 1 8 2 2 Observe pressure readi
12. result is subtracted from the first reading to get the leak value Pressure is set to a negative pressure and the same test is repeated Errors Corrections Leak rate is too high Bad Valve bad pump assy leaky tip bad ballast Cannot talk to handle Bad Slave microcontroller power unitdown amp restart Calibrate Pressure Offset Pot Pressure is set to 0 daPa The offset pot is adjusted for a target value of 150 read at the handle pressure A D Errors Corrections Offset pot cannot be adjusted Bad pot bad Slave microcontroller Cannot talk to handle Bad Slave microcontroller Calibrate Pressure Gain Pot Pressure is set to 400 daPa The gain pot is adjusted for a target value of 30 read at the handle pressure A D Errors Corrections Gain pot cannot be adjusted Bad pot bad pump assy bad Slave micro Cannot talk to handle Bad Slave micro Pressure Convergence Test Pressure is set to 0 daPa The offset pot is checked for a target value of 150 if the value is in spec the pressure is set to 200daPa and the gain pot is checked for target value 21 If the value is in spec the pressure system has converged If either of the values is out of spec the system goes back and readjusts the pressure offset and pressure gain pots Errors Corrections Cannot converge too many iterations Bad offset or gain pot Bad Slave micro Calibrate Microphone This calibration step sets the speaker so that it is able to generate
13. 010 207 cf 11001111 38 26 00100110 123 7b 01111011 208 540 11010000 39 527 00100111 124 576 01111100 209 541 11010001 40 528 00101000 125 570 01111101 210 502 11010010 41 529 00101001 126 576 01111110 211 503 11010011 42 528 00101010 127 7f 01111111 212 d4 11010100 43 2b 00101011 128 80 10000000 213 d5 11010101 44 2c 00101100 129 81 10000001 214 d6 11010110 45 2d 00101101 130 82 10000010 215 d7 11010111 46 52 00101110 583 10000011 216 548 11011000 47 527 00101111 132 584 10000100 217 509 11011001 48 530 00110000 133 585 10000101 218 503 11011010 49 531 00110001 134 586 10000110 219 db 11011011 50 32 00110010 135 87 10000111 220 dc 11011100 51 33 00110011 136 88 10001000 221 dd 11011101 32 34 00110100 137 89 10001001 222 de 11011110 53 35 00110101 138 8a 10001010 223 11011111 54 536 00110110 139 585 10001011 224 560 11100000 55 537 00110111 140 8c 10001100 225 el 11100001 56 38 00111000 141 8d 10001101 226 e2 11100010 57 39 00111001 142 8 10001110 227 e3 11100011 58 3a 00111010 143 8f 10001111 228 e4 11100100 59 3b 00111011 144 90 10010000 229 e5 11100101 60 3c 00111100 145 91 10010001 230 e6 11100110 61 3d 00111101 146 92 10010010 231 e7 11100111 62 3e 00111110 147 93 10010011 232 e8 11101000 63 3f 00111111 148 594 10010100 233 9 11101001 64 540 01000000 149 595 10010101 234 ea 11101010 65 41 01000001 150 96 10010110 235 eb 11101011 66 42 01000010 151 97 10010111 236 ec
14. 01001 94 5e 01011110 179 b3 10110011 10 0a 00001010 95 5f 01011111 180 b4 10110100 11 0b 00001011 96 60 01100000 181 b5 10110101 12 0c 00001100 97 61 01100001 182 66 10110110 13 50 00001101 98 562 01100010 183 b7 10110111 14 0e 00001110 99 63 01100011 184 b8 10111000 15 0f 00001111 100 564 01100100 185 b9 10111001 16 10 00010000 101 65 01100101 186 ba 10111010 17 11 00010001 102 66 01100110 187 bb 10111011 18 12 00010010 103 67 01100111 188 be 10111100 19 13 00010011 104 68 01101000 189 bd 10111101 20 14 00010100 105 69 01101001 190 be 10111110 21 515 00010101 106 568 01101010 191 bf 10111111 22 16 00010110 107 6b 01101011 192 c0 11000000 23 17 00010111 108 6c 01101100 193 11000001 24 518 00011000 109 6d 01101101 194 c2 11000010 25 19 00011001 110 6e 01101110 195 c3 11000011 26 518 00011010 111 56 01101111 196 c4 11000100 27 1b 00011011 112 70 01110000 197 c5 11000101 28 1c 00011100 113 71 01110001 198 c6 11000110 29 1d 00011101 114 72 01110010 199 c7 11000111 30 516 00011110 115 573 01110011 200 c8 11001000 3l 1f 00011111 116 74 01110100 201 c9 11001001 32 20 00100000 117 75 01110101 202 ca 11001010 33 21 00100001 118 76 01110110 203 cb 11001011 34 22 00100010 119 77 01110111 204 cc 11001100 35 23 00100011 120 78 01111000 205 cd 11001101 DEC HEX BINARY DEC HEX BINARY DEC HEX BINARY 36 24 00100100 121 79 01111001 206 ce 11001110 37 25 00100101 122 7a 01111
15. 3 0 IN LB ITEM 9 TO BE TIGHTENED TO A TORQUE OF 1 5 2 0 IN LB USING ITEM i5 5 14 BOND ITEM 12 TO THE SIDE WALLS HOUSING AT LOCATIONS SHOWN Se 4 Ae CEC 2 PLCS 1 KSS xil uad lt f mrs ows so2 BACK HOUSING ASSEMBLY Welch Allyn TINE BACK HOUSING ASSEMBLY ND REY 256505 D rJ 24 eme 1 J S 10 amp ITEM 16 17 REM D ITEMS 42615 TRIM WIRES TO 050 MAX FROM ITEM TRIM LEADS TO 050 MAX 2 PLCS FROM ITEM 5 AND ITEM 19 ITEM 8 10 BE TIGHTENED A TORQUE OF 7 9 IN 02 x DEBCHIPTIOM DAT E aere END aro ER AG eed FEM 502 P N 236339 OO 00000 0000 00000 0000 r cide Ba 4550 Bs dO B F Riz Lj niso ppm RI28 8 B 2 1P33 TP32 cios 3 B B 11 B 28000 991011 RES 55 B fo 83 Rel RIS O H TP31 al B FS6 09909000000 I H H H 0000000000 RIIS 8115 R C40 De RI42 Ri RI4 8
16. 5 cc The operator is prompted for different size cavities The handle runs pressure sweeps for each cavity checks the time it takes to run the sweep and adjusts the motor speed pot to get a 1500 ms sweep A table is created for each size cavity from 0 2cc to 2 5cc Errors Corrections Motor speed pot cannot be adjusted Bad pump assy bad motor speed pot Cannot talk to handle Bad slave micro Test LCD Elements This test verifies that each element of the LCD display is working properly This test verifies that each element is able to work independently of its neighbors Four patterns are displayed for the operator to visually verify These are all elements off all ele ments on and two checkerboard patterns each an inverse of the other These four patterns will test that all elements can be on all can be off and that each can be either on or off independently of its neighbors Errors Corrections LCD element stuck on Bad LCD address line short bad flex LCD element out Bad LCD bad flex address line open LCD stuck neighbors Bad LCD bad flex address line short LCD pixels are faded Bad LCD bad flex Button Test This will test the operability of the three buttons on the handle The operator will be prompted to press each of the three buttons in turn If system is unable to detect button press or the wrong button is pressed an error will be reported Errors Corrections Button press not detected Bad button assy
17. Ammeter reading Current will be 60 mA 5 mA 4 6 Remove Ammeter leads from circuit 4 7 Remove 7 2 volt power supply leads from handle charge contacts 4 8 Check resistance between the two side contacts Value must read between 3 8 KO and 4 0 KO If resistance is too low check C17 C18 and C19 r mA r Probe end battery applied to MT2 Figure 4 1 Recharge Current Preliminary Bench Test for 2 23641 continued Test 5 Inactive Current Drain 5 1 Keep battery in partially installed position as in step 4 2 above 5 2 Connect Milliammeter Negative lead to positive spring contact in the battery compartment as per FIG 5 2 5 3 Connect Milliammeter Positive lead to positive side of battery FIG 5 2 5 4 Observe current drain Current will be less than 1 milliamp typically 500 600 microamps Note One possible cause of failure is shorted capacitor C11 5 5 Leave all connections as they are for the next test Inactive current drain 500 600 microamps Button IN Active current drain 175 25 mA Button OUT Active Current drain 135 25mA Milliamps Prob d X robe en Ew Figure 5 2 Current Drain Test 6 Active Current Drain 6 1 Depress and hold black center push button to activate MT2 6 2 Observe current drain while the black button is depressed Current can rise up to as much as 350 mA 50 mA then fall to 175 mA 25 mA 6 3
18. BOARD GENTLY LIFT MOTOR PUMP ASSEMBLY UP REPLACE MOTOR PUMP ASSEMBLY REPLACE MOTOR PUMP ASSEMBLY INSTALL REPLACEMENT PRE ADJUSTED MOTOR PUMP ASSEMBLY OVER LCD RETAINER RE ATTACH FLEX CIRCUITS TO POWER BOARD AND SWITCH BOARD USE PIN STRAIGHTENING PLIERS OR FINGERS RE ATTACH FLEX CIRCUITS RE ATTACH FRONT HOUSING ASSEM BLY LAY FLEX CIRCUITS ACCORDING TO DRAWING 236300 CALIBRATE HANDLE WITH CALVIN REFER TO SECTION 6 FOR CALVIN PROCEDURE UPON SUCCESSFUL CALIBRATION AND TEST PLACE A DROP OF BLACK MAX tm ADHESIVE M 30341 BETWEEN THE FRONT HOUSING AND THE FIBER STRIPS REPLACE BATTERY AND BATTERY COVER SCREW BATTERY COVER IN PLACE D BOTTOM BOARD D 1 D 2 D 3 REMOVE POWER SUPPLY BOARD TOP BOARD FOLLOW INSTRUCTIONS IN SECTION FOR REMOVAL OF POWER SUPPLY BOARD UNPLUG FLEX CIRCUIT FROM MCU BOARD BOTTOM BOARD USE PIN STRAIGHTENING PLIERS OR FINGERS TO GENTLY PULL THE FLEX CIRCUIT FROM THE MCU BOARD SOCKET REMOVE MCU BOARD UNSCREW FOUR STANDOFFS WITH 1 8 NUT DRIVER GENTLY PULL THE BOARD STRAIGHT OUT OF THE HOUSING FOUR PLASTIC SPACERS ARE ATTACHED TO THE BOARD AT EACH SCREW HOLE TRANSFER THESE TO THE REPLACEMENT MCU BOARD 3 D BOTTOM BOARD D 4 D 5 D 6 NOTES REPLACE MCU BOARD INSTALL FOUR PLASTIC SPACERS ON THE BOTTOM OF THE BOARD INSERT REPLACEMENT BOARD INTO HANDLE WITH INFRA RED LED BASE OF HANDLE IR WINDOW SCREW FOUR STANDOFFS INTO CO
19. CB Handle is noisy and has 181 Handle hasadefective microphone Replace or 2nd pixel up in the LCD display constantly DimLCD display Check power supplies 2 5 volts Defective PS PCB DefectiveLCD display Replace Keypad problem Make sure that the flex is plugged into the keypad properly Check keypad for operation with an Ohm meter Defective MCU or PS PCB Need Cal messages Printout an I E table and look up what the errors mean on the LCD Display Follow the MicroTymp 2 Needs Cal Error Trouble Shooting Guide in the previous sections Handle does not Make sure the unit is powering up communicate with Defective PS PCB printer charger Defective IR on the MCU PCB Replace MCU PCB Handle does not charge Make sure the wires are soldered good to the PS PCB and the charge contacts Defective PS PCB replace Defective MCU PCB replace Handle does not finish sweep Check for leaks in the system on the LCD display Valve Tubing Probe tip Pump assembly Ballast Noisy Handle Follow the instructions provided on the following page SECTION 4 MICRO 2 TROUBLESHOOTING MODEL 23641 PROBLEM CAUSE CORRECTIVE ACTION Reads NEEDS CAL Error s in register s Reset error register s Does not power up Battery low voltage Recharge replace battery Flexcable at keypad board loose Reinsert flex cable at keypad board C16 shorted on PS board Check replace C16
20. Home Motor Error 2 2 Bus Error A D Time out Error Slave RAM test status Slave ROM test status 7 Handle Command List PH CAA C B C C CAD C E C F G C H C C J C K C L C M C N C O C P C Q C R CAS CAT C U C W Ping Handle Read I2E2PROM Write I2E2PROM Pressure Up Pressure Down Speaker On Speaker Off Self test Test I2E2PROM Read Pressure Read Microphone Start Tymp Set LCD Pattern Close Valve Auto Zero Block Rd PROM Block Wr PROM Calib Mode Enable TimeOuts Read Button Do Compliance Power Down Stop Compliance Establish communications Will read one byte from I2E2PROM Will write one byte to I2E2PROM Drives pressure up to 200 daPa Sweeps from 200 daPa to 400 daPa Begins to generate a 226 Hz signal Turns the speaker off Does self test amp sends result byte Tests I2E2PROM zeroing each location Returns current pressure reading Returns current value at mic A D Runs a Tymp Displays a pattern to the LCD 1 7 Closes the valve Opens the valve and homes the pump Sends the entire contents at once Writes entire contents at once Disables time outs Enables time outs Read the state of the handle buttons Maintains compliance until F Powers down unit Turn off compliance SECTION 7 Troubleshooting Guide for MicroTymp2 Handles 11 MicroTymp2 Noise Test Procedure 13 1 Introduction In trouble shooting NEEDS CAL messages on the MicroTymp 2 there are two registers in
21. INSTALL REPLACEMENT BALLAST CLEAN BOTTOM OF BALLAST WITH ALCOHOL AND LET DRY ONE MINUTE ATTACH TUBING REPLACEMENT BALLAST BY FIRST ATTACHING TUBING FROM THE PROBE TIP TO THE TOP END OF THE BALLAST THEN TUBING FROM THE VALVE TO THE SIDE PORT OF THE BALLAST ATTACH TUBING FROM THE PUMP TOP CAP TO THE LOWER SIDE PORT OF THE BALLAST CLEAN MOUNTING SURFACE FOR REPLACEMENT DOUBLE SIDED FOAM TAPE APPLY BROWN LAYER SIDE OF 2 SIDED TAPE TO BOTTOM OF BALLAST ATTACH ADHESIVE BACKED WARNING LABEL TO SIDE OF BALLAST CHECK ALL TUBING FOR SHARP BENDS TWISTS OR LEAKS CALIBRATE HANDLE FOLLOW CALVIN PROCEDURE TO CALIBRATE HANDLE END BALLAST REPLACEMENT 7 J KEYPAD J 1 J 2 J 3 J 4 NOTES K PRINTER AND OR PCB REMOVE KEYPAD UNPLUG MICROTYMP 2 PRINTER CHARGER FROM LINE VOLTAGE PEEL OLD KEYPAD FROM PRINTER CHARGER TOP PANEL USING FINGERNAIL UNDER ONE CORNER UNPLUG FLEX CIRCUIT GENTLY PULL FLEX CIRCUIT FROM BACK OF KEYPAD REMOVE ANY RESIDUAL ADHESIVE FROM THE PRINTER CHARGER TOP PANEL WITH ALCOHOL WAIT ONE MINUTE FOR ALCOHOL TO EVAPORATE REPLACE KEYPAD INSTALL REPLACEMENT KEYPAD REMOVE ADHESIVE LINER FROM PCB PLUG FLEX CIRCUIT INTO KEYPAD PCB DO NOT TWIST FLEX CIRCUIT POSITION KEYPAD BOT TOM EDGE WITH THE BOTTOM EDGE OF THE KEYPAD RECESS IN THE TOP PANEL POSITION TWO SEMI CIRCULAR DETENTES IN THE KEY PAD RECESS FIT INTO TWO SEMI CIRCULAR CUTOUTS ON THE KEY PAD PCB FEED THE FLEX CIRCUIT
22. INTO THE HOLE OF THE TOP PANEL AS YOU PLACE THE KEYPAD AGAINST THE TOP PANEL TEST PRINTER CHARGER PERFORM FULL FUNCTIONAL TESTS ON PRINTER CHARGER REFER TO SPECIFICATION A 02728 IN SECTION 12 END PRINTER CHARGER KEYPAD REPLACEMENT NOTE A CE MODEL PRINTER SEE LABEL WILL CONTAIN MAIN PCB 711730 509 DO NOT REPLACE IT WITH 711730 508 NON CE BOARD YOU CAN NOT UPGRADE 508 BOARD TO A 509 BOARD YOU CAN PUT A 509 INTO A UNIT IN PLACE OF A 508 REMOVE PAPER REMOVE PAPER ACCESS COVER BY PULLING UP ON THE FRONT EDGE PULL PAPER LEVER AND REMOVE PAPER ROLL AND SPINDLE REMOVE TOP PANEL FROM CASE REFER FIG 1 IN THIS MANUAL DO NOT UNSCREW THE TWO SCREWS INDICATED ON THE DRAWING THESE FASTEN THE PRINTED CIRCUIT BOARD TO THE LOWER HOUSING UNSCREW THE SIX 6 REMAINING METAL PHILLIPS HEAD SCREWS AND ONE 1 NYLON NON CONDUCTIVE 3 16 HEX HEAD SCREW USE 3 16 NUT DRIVER TURN THE PRINTER CHARGER OVER AND GENTLY LIFT THE TOP PANEL OFF COMPARE ROUTING AND CONNECTION OF FLEX CIRCUITS TO ASSEMBLY DRAWING INSPECT FOR TEARS AT THE PLUGS UNPLUG THESE TWO FLEX CIRCUITS FROM THE PCB REMOVE THE TOP PANEL 8 K PRINTER AND OR PCB REPLACEMENT NON CONDUCTIVE Em FIGURE I 1 UNFASTENING PANEL Unfasten the top panel by removing all screws as shown in the figure above except the two screws marked with arrows These two screws hold the PCB to the lower housin
23. ITH FOUR SCREWS CONNECT CIRCUIT CONNECTOR TO PRINTER REPLACE PRINTER PCB INTO HOUSING POSITION THE PCB OVER THE HOUSING AND CONNECT THE POWER LEADS TO THE EMI FILTER SECURE THE PCB TO THE CASE WITH TWO SCREWS AND NUTS AS SHOWN BY ARROWS IN FIG 1 1 ATTACH TOP PANEL TO CASE POSITION THE TOP PANEL OVER THE CASE AND CONNECT THE KEYPAD FLEX CIRCUIT TO THE PCB CHECK FOR TWISTS IN FLEX CIRCUIT CONNECT THE CONTACT HOUSING ASSEMBLY FLEX CIRCUIT BLACK SIDE FACING PRINTER WELL OR PIN 1 OF FLEX TO PIN 1 ON PCB TO THE MAIN PCB LOWER THE TOP PANEL SLOWLY AND MAKE SURE CONTACT HOUSING FLEX IS AROUND STANDOFF REFER TO FIG l 1 AND SECURE TOP PANEL TO THE CASE WITH SIX PHILLIPS HEAD SCREWS AND ONE 3 16 HEX HEAD NYLON SCREW USE 3 16 NUT DRIVER AND SLOWLY TIGHTEN UNTIL THE HEAD OF THE SCREW CONTACTS THE CASE INSERT PAPER AND PAPER ACCESS DOOR REFER TO OPERATING INSTRUCTIONS PAGES C 48 AN C 49 FOR PAPER REPLACEMENT TEST PRINTER CHARGER FOLLOW INSTRUCTIONS A SPEC MANUF INSTRUCTIONS STATION 5 TEST AND SHIP IN SECTION 12 10 SECTION 2 PRELIMINARY BENCH TEST FOR MICROTYMP 2 23641 Purpose of test Tests Micro 2 for 1 Leaks 2 Vent rate Noise 4 Recharge 5 Inactive current drain 6 Active current drain These tests help prevent aborted calibration cycles in Calvin thus saving time The technician can resolve MT2 handle problems before starting the recal process How Performed Perform tests in series in
24. LED SHIELDS SHOULD PULL OUT OF THE BOTTOM HOUSING REPLACEMENT OF ESD SHIELDS CE MODEL 17 17 REPLACE SHIELDS AS PER ASPEC 02727 REASSEMBLE UNIT FOLLOW STEPS G1 THROUGH G6 IN REVERSE ORDER FIG G 1 HANDLE CE LABEL WelchAllyn Microlymp 2 H VALVE H 1 NOTES REMOVE VALVE FROM POWER SUPPLY BOARD REMOVE BATTERY COVER AND BATTERY FROM HANDLE REMOVE POWER SUPPLY BOARD FROM HANDLE BY FOLLOWING STEPS IN SECTION B 1 THROUGH B 4 UN SOLDER VALVE FROM FOUR CON NECTION POINTS UNDER THE POWER SUPPLY BOARD LIFT VALVE FROM BOARD AND DISCONNECT TUBING FROM VALVE REPLACE VALVE INSTALL REPLACEMENT VALVE ATTACH TUBING TO PRE TESTED PRE TRIMMED REPLACEMENT VALVE PREPARE BOARD FOR RE SOLDERING BY REMOVING EXCESS SOLDER AND CLEARING BOARD HOLES TO ACCEPT REPLACEMENT VALVE INSERT REPLACEMENT VALVE IN PLACE WITH THE TUBE END TOWARDS THE BALLAST SOLDER THE VALVE IN PLACE CLIP OFF VALVE LEADS ABOVE SOLDER JOINTS INSTALL POWER SUPPLY BOARD INTO HANDLE FOLLOW STEPS B 4 THROUGH B 5 TO INSTALL POWER SUPPLY BOARD CALIBRATE HANDLE FOLLOW CALVIN PROCEDURE TO CALIBRATE HANDLE END VALVE REPLACEMENT BALLAST 1 REMOVE BALLAST FROM POWER SUPPLY BOARD REMOVE BATTERY COVER AND BATTERY FROM HANDLE GENTLY PULL BALLAST FROM THE POWER SUPPLY BOARD LIFT BALLAST FROM BOARD AND DISCONNECT TUBING FROM BALLAST REMOVE DOUBLE SIDED TAPE FROM BOARD IF IT IS PARTIALLY TORN AWAY REPLAGE BALLAST
25. NOSE TO HOUSING DETAIL EG REF SCALE 4 1 DETAIL D SCALE 2 1 5 REF PRIOR TO INSERTION INTO HOUSING DETAIL C 4 SCALE 4 1 2 0002 125 5 ITEMS 54 10 64 12 74 12 I MAY TOUCH EACH OTHER AFTER ASSEMBLY 6 MAXIMUM LEAK RATE AT PRESSURE 400 daPa NOTES TO BE IO dePa S SEC THESE PASSAGES MAY NOT BE RESTRICTED NOR DECREASED 7 NO SOLDER BRIDGING OR SOLDER VOIDS 2 PLOS IN WAY AFTER ASSEMBLY PERMITTED ON ITEMS 6 amp 7 8 MAXIMUM SOLDERING TEMPERATURE FOR SECTION A AFTER ASSEMBLY ITEM 2 MUST TRAVEL FREELY OVER ITEMS ITEMS 5 6 AND 7 IS 600 F 315 C I ANDA WITH DURATION 10 SECONDS MAXIMUM PRIOR TO ASSEMBLY OF ITEM 4 TO ITEM APPLY ITEM 5 9 APPLY ITEM 20 1 1 27 2 LONG PIECE TRANSPARENT TO REFERENCE DIMENSION SHOWN AND DISTRIBUTE EQUALLY 3M SCOTCH MAGIC 810 OR EQUIVALENT AROUND THE CIRCUMFERENCE 172 374 WIDE TO ITEM AT SPLIT AS A APPLY_ITEM 15 WITHIN REFERENCE DIMENSIONS INDICATED BEFORE SHOWN TO AID ASSEMBLY INSERTING INTO ITEM APPLY IN CIRCLES AROUND THE CIRCUMFERENCE IN THE THREE GROOVES OF ITEM 15 8 T 7 T 6 T 5 5 4 5 22 T 2 222222222222 22 SECTION B B 4 LJ 222727222272722222222 lt 2 lt lt 2722227222222222272722222222222222272227222222227227 E N ITEM 7 TO BE TIGHTENED TO A TORQUE OF 2 5
26. OT OCCUR IF IT DOES REPLACE THE MASTER OR MCU PCB Pressure Transducer Error 08 XXXX1XXX Description This error occurs if the Slave consistently 100 times reports to the Master pressure transducer values that exceed the maximum or minimum limits determined at the time of design An error will only be registered during the auto zeroing of the pressure transducer before a pressure up occurs Suggestions Test the pressure transducer section of the circuitry on the MCU PCB per the hardware specification document EEPROM Checksum Error 04 XXXXX1XX Description This error is the result of a corrupted value in the EEPROM Not all of the EEPROM is tested only the locations that contain calibration information This is because these locations should never change once the unit has been calibrated Other locations will change each time a user saves test data or actuation counters are updated Suggestions Clear the error registers re calibrate the unit perform an EEPROM test power down and verify that the problem no longer exists Replace EEPROM and or MCU PCB 47 47 1 47 2 48 4 8 1 4 8 2 Slave Error 02 XXXXXX1X Description This error occurs only when the Slave has an error of its own that has been written to the Historical Slave Error Register Suggestions Verify that the Slave is working properly Investigate the error indicated in the Historical Slave Error Register RAM Error 01 XXXXXXXI
27. R PUMP ASSEMBLY FOLLOW INSTRUCTIONS IN SECTION C4 THROUGH C6 FOR PUMP ASSEMBLY TEST HANDLE PERFORM FUNCTIONAL CHECKS TO ASSURE CORRECT OPERATION OF REPLACEMENT SWITCHES LCD ASSEMBLY F 1 F 2 F 3 F 4 F 5 NOTES REMOVE LCD RETAINER FOLLOW STEPS E1 THROUGH E3 TO REMOVE LCD RETAINER REMOVE LCD MODULE LIFT OUT LCD MODULE REPLACE LCD ASSEMBLY PLACE LCD ASSEMBLY INTO BACK HOUSING REMOVE PROTECTIVE FILM FROM BEZEL RECORD LCD ID ON DOCU MENTATION ALIGN LCD ASSEMBLY WITH FLEX CIRCUIT CONNECTOR ON RIGHT HAND SIDE THEN PLACE INTO HOUSING SECURE MODULE WITH RETAINER PLACE LCD MODULE RETAINER AND PLACE LATCH IN THE NOTCH AT THE TOP OF THE BACK HOUSING ALIGN TWO PINS ON UNDERSIDE OF RETAINER WITH TWO ALIGNMENT HOLES OF KEYPAD PCB SECURE WITH TWO SCREWS REASSEMBLE HANDLE FOLLOW INSTRUCTIONS IN SECTION 4 THROUGH 6 AND PERFORM FUNCTIONAL CHECKS END LCD ASSEMBLY REPLACEMENT ESD SHIELDS CE MODEL REMOVAL OF ESD SHIELDS SEE FIG G 1 G 1 G 2 G 3 G 4 G 5 G 6 NOTES REMOVE POWER SUPPLY BOARD FOLLOW INSTRUCTIONS IN SECTION REMOVE MOTOR PUMP ASSEMBLY FOLLOW INSTRUCTIONS IN SECTION C REMOVE MCU BOARD FOLLOW INSTRUCTIONS IN SECTION D REMOVE KEYPAD ASSEMBLY FOLLOW INSTRUCTIONS IN SECTION E REMOVE LCD ASSEMBLY FOLLOW INSTRUCTIONS IN SECTION F REMOVE ESD SHIELDS THE LCD GASKET AND THE ESD SHIELD ARE CONNECTED WITH TWO STRIPS OF ESD TAPE THESE ASSEMB
28. RD OVER STAND OFFS WITH BATTERY HOLDER NEAR THE BOTTOM OF THE HANDLE SCREW THE BOARD TO THE STRAIN RELIEFS WITH TWO LONG SCREWS AT THE BOTTOM OF THE BOARD AND TWO SHORT SCREWS AT THE TOP OF THE BOARD B 5 PLUG IN FLEX CIRCUIT PLUG FLEX CIRCUIT INTO BOARD USING PIN STRAIGHTENING PLIERS OR FINGERS IF THE TWO FIBER SEPARATORS BECOME LOOSE RE CONNECT THEM IN THEIR ORIGINAL POSITION REFER TO ASSEMBLY DRAWING WITH LOCTITE BLACK MAX ADHESIVE M 30341 B 6 CALIBRATE HANDLE WITH CALVIN REFER TO SECTION 6 FOR CALVIN PROCEDURE UPON SUCCESS FUL CALIBRATION AND TEST PLACE A DROP OF BLACK MAX tm ADHESIVE M 30341 BETWEEN THE FRONT HOUSING AND THE FIBER STRIPS REPLACE BATTERY AND BATTERY COVER SCREW BATTERY COVER IN PLACE END POWER SUPPLY BOARD REPLACEMENT NOTES MOTOR PUMP ASSEMBLY 1 2 3 C 4 C 5 NOTES REMOVE BATTERY COVER AND BATTERY UNSCREW BATTERY COVER SCREW AND REMOVE THE COVER REMOVE THE BATTERY FROM THE BATTERY HOLDER REMOVE FRONT HOUSING ASSEMBLY PEEL THE WELCH ALLYN LABEL FROM THE UNIT AND UNSCREW TWO SCREWS UNDER THE LABEL REMOVE THE FRONT HOUSING ASSEMBLY FROM THE HANDLE DO NOT UNPLUG FLEX CIRCUIT FROM LCD BOARD NOTE If unit is a CE model take caution in removing the front housing There are two pieces of fragile ESD tape at both corners REMOVE TUBING FROM MOTOR PUMP ASSEMBLY PULL TUBE FROM THE PUMP PULL TUBE FROM THE BALLAST DISCONNECT FLEX CIRCUIT FROM SWITCHES BOARD AND POWER SUPPLY
29. RETURN INSTRUMENT FOR SERVICE WELCH ALLYN RECOMMENDS ANNUAL RECALIBRATION OF THE HANDLE THE PRINTER CHARGER BASE DOES NOT REQUIRE CALIBRATION A MONTHLY FUNCTIONAL CHECK USING THE MI CRO TEST CAVITY IS RECOMMENDED SEE PAGE D 51 OPERATING INSTRUCTIONS IMPORTANT THE MICRO TEST CAVITY PROVIDES A FUNCTIONAL TEST ONLY IT DOES NOT CALIBRATE AND IS NOT INTENDED TO TAKE THE PLACE OF CALIBRATION SERVICE HANDLE CODE READS LOW BATT DIFFICULT TO COMPLETE A TEST HANDLE CODE THE BATTERY MAY BE DISCHARGED FROM EXTENDED STORAGE 60 DAYS AND SIMPLY NEEDS RECHARGING IF THE BATTERY DOES NOT RECHARGE OVERNIGHT APPROX 14 16 HRS THEN EITHER THE BATTERY IS DEFECTIVE AND SHOULD BE REPLACED OR THE PRINTER CHARGER CHARGING CIRCUIT IS DEFECTIVE CHECK THE PRINTER CHARGING ABILITY BY IN SERTING ANOTHER MICROTYMP HANDLE AND CHARGING IT OR INSERTING ANY MODEL AUDIOSCOPE SCREENING AUDIOMETERS FOR CHARGING IF THE OTHER MODELS CHARGE THEN REPLACE THE BATTERY IN THE HANDLE WITH NEW ONE REFER PAGE 12 IN OPERATING INSTRUCTIONS READS LEAK TIPS ARE NOT INTENDED TO BE DEEPLY INSERTED INTO THE EAR CANAL USING IMPROPER TIP SIZE CAUSES LEAKS AND WILL MAKE IT DIFFICULT TO COMPLETE TEST REFER TO PAGE 5 OF OPERATING INSTRUCTIONS CUSTOMER SERVICE QUESTIONS AND ANSWERS ALSO REFER TO OPERATING INSTRUCTIONS PN 236311 FAILURE or COMPLAINT POSSIBLE CAUSE amp CORRECTIVE ACTION UNIT WILL NOT CHARGE PRIN
30. RNERS OF MCU BOARD TIGHTEN TO 1 5 TO 2 INCH LBS PLUG IN FLEX CIRCUIT CONNECT THE CIRCUIT TO THE MCU BOARD 5 INSERT SIDE CONTACTS INTO THE SLOTS OF THE BACK HOUSING WITH THE BLACK WIRE ON THE RIGHT BALLAST SIDE AND THE RED WIRE ON THE LEFT SIDE TUCK CONTACT WIRES UP AGAINST BOTTOM END OF BATTERY RETAINER INSTALL POWER SUPPLY BOARD FOLLOW INSTRUCTIONS IN SECTION B FOR REPLAGEMENT OF POWER SUPPLY BOARD CALIBRATE UNIT USING CALVIN SYSTEM CALVIN USERS MANUAL IN SECTION 6 E KEYPAD ASSEMBLY E 1 ING E 2 E 3 E 4 REMOVE FRONT HOUSING ASSEMBLY FOLLOW INSTRUCTIONS IN SECTION C2 TO REMOVE FRONT HOUS REMOVE MOTOR PUMP ASSEMBLY FOLLOW INSTRUCTIONS IN SECTION C3 TO REMOVE MOTOR PUMP ASSEMBLY REMOVE LCD MODULE SUPPORT FROM BACK HOUSING UNSCREW TWO SCREWS AND LIFT SUPPORT DOWN AND AWAY FROM LCD MODULE DO NOT ALLOW THE LCD DISPLAY TO FALL OUT OF THE BACK HOUSING PRESS ANY BUTTON TO LIFT KEYPAD ASSEM BLY OUT OF BACK HOUSING REPLACE KEYPAD ASSEMBLY REPLACE KEYPAD ASSEMBLY INSERT REPLACEMENT KEYPAD ASSEMBLY INTO HOLES IN BACK HOUSING WITH LETTERS RIGHT SIDE UP ALIGN LCD RETAINER OVER LCD AND KEYPAD ASSEMBLY AND INSERT LATCH OF RETAINER INTO NOTCH IN TOP OF BACK HOUSING ALIGN 2 ALIGNMENT PINS ON THE BACK OF THE RETAINER WITH THE TWO ALIGNMENT HOLES IN THE KEYPAD ASSEMBLY PRINTED CIRCUIT BOARD SECURE RE TAINER WITH TWO SCREWS 4 KEYPAD ASSEMBLY E 5 E 6 NOTES REPLACE MOTO
31. TER FUNCTION MESSAGES NO DATA REINSERT HANDLE NO DATA NOTHING IN MEMORY COMPUTER INTERFACE SWITCH 4 PRINTER SERVICE CODES AS ONLY A MICROTYMP 2 PRINTER CHARGER WILL CHARGE THE MICROTYMP 2 HANDLE CHECK THAT PRINTER CHARGER POWER CORD IS CONNECTED TO THE PRINTER CHARGER AND A FUNCTIONING RECEP TACLE OF PROPER VOLTAGE FRE QUENCY AND PLUG TYPE THE GREEN POWER INDICATOR WILL ILLUMINATE SEE PAGE 4 OPERATING INSTRUCTIONS SEE LOW BATT ABOVE IS SET ON BOTTOM OF PRINTER FOR POSSIBLE CAUSES AND SOLUTIONS FOR THESE MESSAGES REFER TO PRINTER FUNCTION MESSAGES TABLE 2 ON PAGE 23 OF OPERATING INSTRUCTIONS INDICATED BY NUMBER OF FLASHES OF GREEN POWER INDICATOR ON PRINTER CHARGER BASE ONE FLASH TWO FLASHES THREE OR MORE FLASHES FOR POSSIBLE PROBLEMS AND SOLU TIONS FOR THESE FLASHING CODES OR MESSAGES REFER TO PRINTER CHARGER FLASHING INDICATORS TABLE 3 OF OPERATING INSTRUCTIONS FOR ALL OTHER FAILURES AND OR RECALIBRATION RETURN HANDLE AND OR PRINTER CHARGER BASE TO AN AUTHORIZED SERVICE CENTER AS INDI CATED ON PAGE E 55 OF OPERATING INSTRUCTIONS Welch Allyn Inc 4341 State Street Rd Skaneateles Falls NY 13153 0220 CALVIN MicroTymp2 Calibration System User Manual By Rick Slater February 22 1993 Revision A by RPS date 7 23 93 Copyright 1992 by Welch Allyn Inc Skaneateles Falls NY 13153 All rights reserved This document is the property of Welc
32. TTERY CHARGER NEGATIVE j POWER duppi Y e gt E 1 MAIN 5 I POWER SUPPLY KE YPAD POWE RUP MC I DIM LOGIC 9 KEYPAD ie N ence 0 VAL VE CONTROL 3 aE I mui c 4 i RESET AND MCU BOARD POWER DOWN m 1 I GIC i PUMP MOTOR 1 CONTAOL 1 LCD ADC INTERF ACE I I 12 2 VER MCU MASTER IR MCU I SPEAKER PUMP MOTOR 1 DRIVE HOME DETECT PERSAN Bly NE PRESSURE i I AMPLIFIER Geek 0 I HON AMPLIFIER UC RUD OUI COMPLIANCE CONTROL LOOP i PRESSURE bn TER et an TRANSDUCER MICROPHONE SPEAKER SIGNAL Fe POWER MICROTYMP2 HARDWARE BLOCK DIAGRAM 1 5 93 mo Hcc 5 4 SECTION 11 02727 55 SHEET EXCERPTS FOR 23641 MICROTYMP 2 HANDLE TESTS SECTION 12 02728 Process Sheet excerpts for 71171 71172 71174 71176 71179 Micro Tymp 2 Printer Charger tests
33. WelchAllyn Service Manual Micro Tymp 2 Tympanometric System 23640 handle 71170 printer charger Includes CE Model 4341 State Street Road P O Box 220 Skaneateles Falls NY 13153 0220 Part 236409 Copyright 1995 236409 5 28225 6 95 8 Settembre 236409 Added CE Updates amp Cautions 5 35489 6 97 R Settembre NOTE Drawings amp illustrations in this document for reference only Consult system Part Desc of Change ECNH EN or call factory for latest revisions MICROTYMP 2 SERVICE MANUAL Micro Tymp 2 Tympanometric System 23640 handle 71170 printer charger Includes CE Model Copyright 1995 Welch Allyn Co 4341 State Street Road Welch Allyn P O Box 220 Skaneateles Falls NY 13153 0220 Service Manual Part 236409 FORWARD This manual provides technical assistance for calibrating diagnosing and servic ing the Welch Allyn MICROTYMP 2 handle and Printer Charger The MicroTymp 2 and or Printer Charger will be returned to the Technical Ser vice Department for either Recalibration handle only or for diagnosis and repair For Printer Charger tests refer to current factory approved diagnostic tests Once the fault has been determined refer to the Manual chapters I and J for the appropriate Removal and Replacement sequence Re test the Printer Charger after the repair is completed Similarly when servicing the MicroTymp 2 handle refer to the most recent trou
34. ______ lt p Weich Alyn II m HANDLE ASSEMBLY 236300 me THESE DRAWINGS AND SPECIFICATIONS ARE THE PROPERTY OF WELCH ALLYN INC AND SHALL NOT BE REPRODUCED OR COPIED OR USED AS A BASIS FOR MANUFACTURE OR SALE OF EQUIPMENT OR DEVICES WITHOUT WRITTEN PERMISSION REV DESCRIPTION REL TO PROD ENG XF REPL D ITEM 3 LOC N DIM 28922 NOTES I CLEAN CONTACT SURFACE OF ITEM WITH 70 ISOPROPYL ALCOHOL BEFORE APPLICATION OF ITEMS 2 4 3 CENTER THESE ITEMS AS SHOWN WITHOUT WRINKLES OR FOLDS AFTER APPLICATION THIS DWG 501 PART NO BRAWN NNN SKANEATELES FALLS 8 31 82 Welch Allyn WW MN YORK U S A BATTERY COVER ASSEMBLY DESCRIPTION MATERIAL FINISH DESIGNED DLB BATTERY COVER UNLESS OTHERWISE SPECIFIED DIMENSIONS ARE IN INCHES AE ASSEMBLY AND INCLUDE PLATING TOLERANCES Mle Elo ANER ms DRAWING NO XXX 005 12 4 92 TOLERANCES PER ANSI 14 5 64475 256502 REMOVE BURRS 4 SHARP EDGES REL TO PROD SCALE EXTERNAL THDS CLASS 2A INTERNAL THOS CLASS 2B NOT SCALE sU 4 1295 DETAIL 4 SCALE 4 1 SEE DETAIL D REF DETAIL SEE DETAIL B BONDING
35. age Some of these are custom built Welch Allyn fixtures and fittings and so designated by number Other items such as the Diaphragm Tucker and the Board to Board connector are required T 12494 test cavity set for calibrating the Micro Tymp 2 handle consists of the cavities listed below 0 2 cc 2 0 cc 0 5 cc 2 4 1 0 cc 2 5 cc 1 5 cc 3 0 cc Calibration Equipment for Micro Tymp 2 Description Function Calvin Component Calvin Component Calvin Component Calvin Component Calvin Component Calvin Connection Calvin Component Calvin Component Calvin Component i passa eed S C 2 T 3382 32 Welch Allyn 8 piece Test Cavity Set for CALVIN SIZES 2 5 1 1 5 2 2 4 2 5 3 T 12494 12256 37 Pressure Applicator Box Troubleshooting Leaks 5657 M 31446 commercially available 9 BILL MATERIALS REPAIR MICRO TYMP 2 PRINTER CHARGER AND HANDLE Welch Allyn service part numbers and material numbers appearing in this manual are for the purpose of familiarizing new technicians with the Welch Allyn parts numbering system Order replacement parts as always by referencing your latest bill of materials parts catalog and assembly drawings Repair Parts MT2 Handle PARTNUMBER DESCRIPTION Ea 23641 REPAIR M11385 DISPOSABLE DISPENSING TIP 10 23641 REPAIR m1473 PARISLABEL O fo 23641 REPAIR
36. an 85 dB signal ina 2cc cavity and then calibrates the microphone gain pot MicGain pot The operator is prompted to connect the B amp K 2231 sound meter which is equipped with a 2cc micro phone to the handle tip The admittance gain and admittance offset pots are set to default positions Errors Corrections No tone generated Bad speaker gain pot Tone generated but not at 85 dB Bad speaker gain or admittance gain pots MicGain Pot cannot be adjusted Bad microphone gain pot Harmonic Distortion Check This calibration step will measure the amount of distortion present in the signal gener ated by the handle at 85 dB measuring the amplitude of the signal at different harmonic frequencies Errors Corrections THD too large Badop amps bad D Aconverter bad A D converter Enter the Barometric Pressure This step reads the barometric pressure to compensate for the difference between the days changing barometric pressures and the sea level standard we set the units to This is done automatically in units with an automatic barometer Admittance Offset POT Calibration This calibration step calibrates the admittance offset pot The operator will be prompted to place a standard 0 5cc cavity on the handle tip The handle will be instructed to generate 85 dB signal by setting the admittance gain pot to the predetermined value for 0 5cc cavity Calibration of the admittance offset pot is then attempted Errors Corrections C
37. annot adjust pot Bad admittance gain pot Calibrate Speaker This calibration step calibrates the handle speaker The operator will be prompted to place standard 3 0cc cavity on the handle tip The handle will be instructed to gener ate an 85 dB signal by setting the admittance gain pot to the predetermined value for 3 0cc cavity Calibration of the speaker gain pot is then attempted Errors Corrections Cannot adjust pot Bad speaker gain pot Admittance Offset Pot and Speaker Gain Pot Convergence This test repeats the above two tests of resetting the admittance offset and speaker gain pots until the admittance offset does not change when the speaker gain is set Errors Corrections Cannot converge too many iterations Bad admitt offset or speaker gain pots Volume Calibration This calibration step provides another chance to test the speaker and microphone working together Volume Vea can be determined based on knowledge of the output level of the admittance gain pot The operator is instructed to place different size cavi ties on the tip of the handle The handle is instructed to obtain a 85db level the value of the admittance gain pot is read to determine if it matches the value it should be for the cavity set on the tip Errors Corrections Volume is incorrect Redo sound cal Calibrate Motor Speed This step of the calibration process is used to calibrate the motor speed table for cavity sizes of 0 2 cc through 2
38. bleshoot ing guide and Calvin Users guide Once the failed component has been identified refer to the Manual chapters B through H for the appropriate Removal and Replacement sequence Re test re calibrate the handle once the repair has been completed The repair TASK procedures R amp R Removal and Replacement are written to provide quick and easy reference for different experience levels of repair technician Required specifications and materials are listed at each step where applicable For example Instructions will start off with TASK TO DO For example 3 Unplug Flex Circuit statement This will be followed by a TECHNIQUE HOW TO DO statement Follow these steps to preform the task Grasp pump assembly flex circuit with pin straightening pliers This manual is written in a style useful for training and or translation Set up training sessions to allow the trainee to practice the use of the diagnostic repair adjust ment and re testing procedures found in this manual Set up hands on practice ses sions to enable the technician to develop and retain skills Provide each trainee with the opportunity to practice the procedure s after it has been demonstrated by the instructor IMPORTANT Welch Allyn service part numbers and material numbers appearing in this manual are for the purpose of familiarizing new technicians with the Welch Allyn parts numbering system Order replacement parts as alway
39. e Up Sends a pressure up command to the handle e Pressure Down Sends a pressure down command to the handle and sums the pres sure sweep rate table and displays the total time needed for the pressure down sweep Set Cavity Size Reads the set cavity size from the handle and prompts the user to change it Values from 0 2 to 2 5 are the only accepted response Escape is not valid Set Pressure to Handle The system requests the user place the pressure tube on the handle and then requests a pressure value The valves in the handle and on the pressure system are closed and the syringe creates the requested pressure Pres sure range is 220daPa to 420 daPa e Read Pressure Sends a read pressure transducer command to the handle e Close Valve Sends a close valve command to the handle Auto Zero Sends an open valve and re load pressure pots command to the handle Motor Test Menu Set Cavity Size Reads the set cavity size from the handle and prompts the user to change it Values from 0 2 to 2 5 are the only accepted response Escape is not valid e Pressure Sweep Sends a pressure up command to the handle then sends pres sure down command to the handle and sums the pressure sweep rate table and displays the total time needed for the pressure down sweep Auto Zero Sends an open valve and re load pressure pots command to the handle Handle Speaker Menu Speaker On Sends a speak
40. each table zero for any particular block in the table means that error didn t occur one means an error did occur For example lets assume the Historical Slave Error Register SAC contains 08 The first thing to do is to convert the 08 to binary Looking up in the table we see that 08 00001000 in the binary column Matching the binary digits with the Historical Slave Error Register Table we see that the 1 is fourth from the right which corresponds to Home Pump Error More than one error can be indicated by either or both of the error registers For example assume the Historical Master Error Register contains 0a The binary equivalent is 00001010 Notice now that there are two digits that are set to Matching this binary number with the Historical Master Error Table we see that Pressure Transducer Error occurred and so did a Slave Error Multiple errors are not that common Most of the time you get a NEEDS CAL message you will find only one error indicated by the error registers The N A blocks in each table indicate that these locations aren t used for errors If you ever determine that one of these locations contains aone then youcan assume the associated microcontroller has been damaged and no longer functions properly Historical Slave Error Register AC A D I2C Bus Timeout Error Error Historical Master Error Register AD Pressure EEPROM Transducer Checksum Error Error Once you
41. er on command to the handle Speaker Sends speaker off command to the handle Read Microphone Sends read microphone command to the handle and displays the result Calvin Tools Menu Set Pressure system requests the user place the pressure tube on the handle and then requests a pressure value The valves in the handle and on the pres sure system are closed and the syringe creates the requested pressure Pres sure range is 220daPa to 420 daPa Valve Tool Allows you to open and close the pressure relief valve Read Barometer Updates barometric pressure display on top of the display Handle Speaker Commands Displays menus options for turning on the handle speaker and reading the handle microphone Create database Files Select the item to create empty calibration record databases Prom Editor The PROM editor allows you to interactively edit the contents of PROM The file promuse msk can be used to selectively specify which locations are automatically read Locations which are not read in are marked with If you lose communica tions with the handle a location will be marked as XX The Home key can be used to resync with the Handle The current cursor location is marked in white Locations which have been changed are displayed with yellow Prom File Menu This menu allows you to load default values in to PROM from a file or to save PROM values to a file All PROM files
42. er specialized needs Calibration Menu e Pressure Subsystem Calibrates the pressure subsystem components of the handle e Align MicGain Pot Calibrates the microphone gain pot as part of the compliance sub system alignment ofthe handle Compliance Subsystem Calibrates the compliance subsystem components speaker and admittance gain pots of the handle Motor Sweep Rate Calibrates the motor subsystem components of the handle e Generate Checksum Updates the I2E2PROM checksum This is necessary after performing any of the above calibrations Saves the E PROM values to the PRM directory Tymp Noise Test Runs full Tymp sweeps on different size cavities Compliance noise is tested to ensure flat Tymps and the Vea is checked to match the cavity Individual Tests Menu Motor Test Commands This menu item leads to new menu which provides com mands to test the motor speed of different size cavities Volume Test This menu checks the handle can correctly determine the size of different cavities THD This menu checks total harmonic distortion of the speaker in the handle Leak Test This menu item checks the leak rate of different pressures in the handle Button Test This menu item checks the handle can correctly read button presses e LCD Test This menu item checks the handle can correctly display different patterns and all pixels on the display are working correctly Handle Pressure Menu e Pressur
43. g Remove them if the PCB is to be removed after the top panel is off NOTE USE 3 16 NYLON HEX HEAD SCREW IN LOCATION AS SHOWN IN ABOVE FIG URE TIGHTEN UNTIL HEAD OF SCREW IS IN CONTACT WITH CASE K PRINTER AND OR PCB 3 REMOVE PRINTER AND PCB FROM PRINTER CHARGER HOUSING TURN THE HOUSING ON END AND SUPPORT THE PCB FROM WITHIN WHILE UNSCREWING TWO REMAINING SCREWS AND NUTS LIFT THE PRINTER PCB ASSEMBLY PARTIALLY OUT OF THE CASE TO ALLOW YOU TO DISCONNECT THE THREE POWER LEADS FROM THE EMI FILTER BE CAREFUL NOT TO BEND THE DIP SWITCH ASSEMBLY REMOVE PRINTER FROM PCB UNPLUG CONNECTOR FROM PRINTER PARTIALLY UNSCREW FOUR SCREWS ONLY AS FAR AS NEEDED TO DISENGAGE THE PRINTER SLIDE THE PRINTER OUT FROM UNDER THE GEAR COVER THIS METHOD WILL KEEP THE FOUR STANDOFFS CAPTIVE ON THE SCREW THUS ELIMINATING HAVING TO REPOSITION THEM WHEN INSTALLING THE REPLAGEMENT PRINTER IF YOU REMOVE THE FOUR SCREWS ENTIRELY THE FOUR SMALL PLASTIC STAND OFFS WILL FALL OUT FROM UNDERNEATH THE BLACK PAPER WELL IF THEY DO FALL OUT ROTATE PAPER WELL OUT OF THE WAY AND USE SUPER GLUE TO HOLD STANDOFFS TO BOARD WITH 1 64 DOT OF GLUE TO THE STANDOFF ATTACH STANDOFFS TO THE BOARD ROTATE PAPER WELL OVER BOARD AND ALIGN HOLES WITH STANDOFFS REPLACE PRINTER ATTACH REPLACEMENT PRINTER TO PAPER WELL PCB SLIDE REPLACEMENT PRINTER UNDER GEAR COVER AND ALIGN SCREW HOLES IN PRINTER WITH HOLES IN PCB PAPER WELL SECURE PRINTER TO PCB BOARD ASSEMBLY W
44. ght Charge light does not light Charge light ON without handle in well Shorted Q1 Shorted D1 Defective C3 Defective C4 Defective U1 Voltage at U1 pins Il 12 is too low under 13VOC or too high over 17VDC Defective D6 shorted Print Head Shorted Poor cable connection P302 Defective U201 Defective Print Head Defective U201 portions of print missing Poor cable connection P301 Cold solder joint on contact housing assembly 711702 501 Defective contact housing assembly Cold solder joint at P302 U301 defective LED defective Cold solder joint at P302 Q305 defective LED defective Cold solder joint on housing assy Defective capacitor C309 C310 C311 Replace Q1 Replace D1 Replace C3 Replace C4 Replace U1 Replace D6 Replace Print Head Reseat cable Replace U201 Replace Print Head Replace U201 Reset cable Repair cold solder joint Replace contact housing assembly Repair cold solder joint Replace U301 Replace LED Repair cold solder joint Replace Q305 Replace LED Repair cold solder joint Replace defective capacitor SECTION 5 CUSTOMER SERVICE QUESTIONS AND ANSWERS ALSO REFER TO OPERATING INSTRUCTIONS PN 236311 FAILURE or COMPLAINT FOR HANDLE HANDLE CODE READS NEEDS CAL POSSIBLE CAUSE amp ACTION FOR HANDLE HANDLE HAS FAILED INTERNAL CALIBRATION TEST SEE PAGE 14 FIG 18 OF OPERATING INSTRUC 5
45. gisters powering the unit down and then powering it back on 35 Pump Error 08 XXXX1XXX 3 5 1 Description An error has occurred in which the optical sensor has not detected the pump flag in the proper position after a Home Pump command has been attempted 3 5 22 Suggestions Verify the flex is properly seated in the connector Verify that the pump and are functional sometimes the pump can be stuck at one end of its travel and thus not move when the motor is actuated Verify the black and red wires to the pump motor are connected properly to the flex Verify there are no cracks or abrasions in the flex Verify the solder connections to the optical Verify that drive belt is in good condition 3 53 N A 04 XXXXXIXX THIS ERROR SHOULD NOT OCCUR IF IT DOES REPLACE THE SLAVE OR MCU PCB 3 6 02 XXXXXXIX THIS ERROR SHOULD NOT OCCUR IF IT DOES REPLACE THE SLAVE OR MCU PCB 3 7 N A 01 XXXXXXXI THIS ERROR SHOULD NOT OCCUR IFIT DOES REPLACE THE SLAVE OR MCU PCB 4 1 4 2 4 3 Historical Master Error Register N A 80 IXXXXXXX THIS ERROR SHOULD NOT OCCUR IF IT DOES REPLACE THE MASTER OR MCU PCB N A 40 XIXXXXXX THIS ERROR SHOULD NOT OCCUR IF IT DOES REPLACE THE MASTER OR MCU PCB N A 20 XXIXXXXX THIS ERROR SHOULD NOT OCCUR IF IT DOES REPLACE THE MASTER OR MCU PCB N A 10 XXX1XXXX 4 5 4 5 1 4 5 2 4 6 4 6 1 4 6 2 THIS ERROR SHOULD N
46. h Allyn Inc The contents are considered confi dential and proprietary This document can only be duplicated or distributed with the expressed written consent of the Welch Allyn Corporation Table of Contents I tFoOd ucti n ed 31 Calibration PFODBBS iocos ias Een esi ii pta apa Cu Ouid GN 31 2 1 Background Information 5 55955 5 355 99959558 8 998988888 999935556 31 2 2 ErrorHa dling me 31 2 3 AES re 32 24 LOG 32 Potentiometer Setting Routine J J J 32 Operational Procedure JJ 33 Menu Options uuu ass Fx adl ex Cua Cbar aca aU D vc 9 Calibration Signature Dove c 37 Status asset 40 Handle Command List 41 1 Introduction This document presents an overview of the calibration process and functionality testing performed on the MicroTymp2 handle by the calibration system The primary purpose of the calibration system is to calibrate MicroTymp2 handles after they have been as sembled An important secondary pur
47. have the extension PRN The file must contain exactly 256 lines A lines specifies a single memory location Lines with 1 will be ignored and will not affect PROM e Read from File Use this option to load PROM memory from a file in the PRM direc tory Tab to get to the list highlight the file to be read Write to File Use this option to store values from PROM to a file Locations marked as are not written to the file All files will be written to the PRM directory do not specify a directory The file will have the entered filename with an extension of PRN Do not specify any other extension Formatted dump Selecting this option will dump the contents of the editor to a file The format is ASCII text suitable for printing e Read entire PROM Use this menu item to read the entire contents of into the editor Terminal The serial terminal program is used to directly communicate with devices connected to COM or 2 The following special keys are interpreted Alt S Brings up a menu which lets you choose which device the terminal talks to Alt H Toggles between ASCII output and Hex output Alt Q Leaves the terminal program 5 Calibration Signature At PROM address 2E hex and 2F hex a 16 bit word describes the state of the handle When the 16 bit word states FACE the unit considers itself to be calibrated When the unit does not say and it should say the unit considers
48. it if failed a reason for the failure will be displayed Additionally the current log file willhave additional information leading up to the failure See the section on Log Files for more information is possible that calibration equipment failures or misalignments will cause errors in the calibration In most cases these errors will have the term Equipment error in the error message In some cases it will be difficult to differentiate between a handle failure and equipment failure a pressure leak is a good example of this It should be presumed that the problem is with the handle rather than the equipment until all handles begin to show the same problem 23 Calvin res File There is a resource file call CALVIN RES that is easily edited by any text editor This file completely controls how Calvin is run What tests are run which order tests are run what values pots need to be set to what pressures or sound levels equipment should be set to which ports are used to run the equipment and much more can all be modified with this file This allows Calvin to easily be supported and updated without a programmer or changes to the program 2 4 Log File The log file is created when Calvin is started each day Calvin names the log file with CAL as the start of the name the month day as the end of the name and LOG as the extension As Calvin runs a test sets a pot or encounters a problem it writes this event to the log file with
49. itself under calibration When the unit is under calibration it allows many faults to pass by without writing these faults to the Status Register The calibration system writes DEAD to the signature addresses at the start of calibration and when the unit is suc cessfully calibrated it writes FACE This is done just before the checksum is calcu lated on addresses 00 to 2F and placed in addresses 30 amp 31 hex 6 Status Registers At PROM address AG AD and AE hex there are three status registers The status register at AC hex is Slave processor history register fatal error occurs with the Slave bit is set in this register AD hex is the Master status register if there is problem with the Master bit is set in this register When fatal error bit is set in the Slave register AE hex the Master sets the Slave Error bit and adds the Slave Error to the Slave History Register AE hex is the Slave Status Register errors in the Slave are placed here This register can be changed or overwritten but a history of errors is kept in the Slave History Register Master Status Register AD hex Failure Decode 6116 564248404 Master RAM test status Slave Error 2 calibration checksum status Pressure Transducer Error NA NA NA NA Slave Status Register o o jo x x Es Pressure Leak Pressure Transducer Too High Error Pressure Transducer Too Low Error
50. ng on T 5657 Pressure should vent from 400 dPa to 0 dPa in 1 second or less Apply 7 2 Volts D C momentarily to open valve Valve will un latch and hold an open position 72 Probe end Empty Battery compartment Figure 1 2 Opening Valve to test Vent Rate Test 3 Noise 3 1 Put 2 cc cavity onto the probe tip 3 2 Take Tympanogram of cavity by depressing and releasing black test button 3 3 Observe for noise Repeat 5 times 3 4 Observe the number of rows above baseline None is ideal One row is acceptable Two or more lines above baseline is unacceptable and constitutes a failure 3 5 Repeat steps 3 2 to 3 4 with 1 0 cc 2 0 cc and 2 4 cc cavities Preliminary Bench Test for 2 23641 continued Test 4 Recharge 4 1 Establish and maintain 7 2 to handle charge contacts Polarity is shown in FIG 4 1 4 2 Snap the negative end of a fully charged battery into negative battery clips with the battery positive end tipped up at about 45 degrees The positive spring must not touch the positive end of the battery only the negative end of the battery makes contact with the battery compartment negative contacts as shown in FIG 4 1 below 4 3 Connect Milliammeter Negative lead to positive side of the battery as per FIG 4 1 below 4 4 Connect Milliammeter Positive lead to the positive spring in the battery compartment as per FIG 4 1 below 4 5 Observe
51. nspections and perform these if required INSPECT AND TEST it before and after it is repaired Documentation should include general condition defects missing components and labels electrical functional and mechanical problems Operate the returned instrument to try to duplicate the customer s complaint before and after it is repaired Forward TABLE OF CONTENTS MICRO 2 Safe Service 1 1 1 _ ii Section 1 Removal and replacement r amp r gt Section 2 Section 3 Section 4 Section 5 Section 6 Section 7 Section 8 Section 9 Section 10 Section 11 Section 12 Normal maintenance 2 1 Power supply board assembly 2 Motor pump assembly 3 MCU Board assembly 2 3 4 Keypad assembly 4 5 LCD Assembly 5 ESD Shields yg 6 Valve eee 7 Ballast eee 7 Printer charger keypad 7 8 PrinterandorPCB 8 10 Preliminary Handle Bench Test Micro Tymp 2 Noise Test Procedure Technical Troubleshooting Guide for Micro Tymp 2 Handles amp Printer Chargers Customer Service Questions Answers CALVIN Micro Tymp 2 Calibration System User Manual Micro Tymp 2 NEEDS CAL Error Troubleshooting Guide Tools Test Equipment listing Calvin Components Repair Parts Drawings A 02727 Process Sheet excerpts for 23641 Micro Tymp 2 Handle tests A 02728 Process Sheet excerpts for
52. on Power Supply board PS Defective Master MCU 236537 546 Replace Master MCU Defective Crystal 236542 1205 Replace crystal Fuse blown 1 Replace fuse Unit will not take Broken connection Repair broken connection tymp stays in at flex speaker OPEN mode Defective speaker Replace defective speaker Clogged probe tip Clean out clogged probe tip Fading checkerboard Shorted capacitor Replace shorted capacitor when activated on MCU board on MCU board 33uf Fails leak test Defective valve Replace valve shows leak when Defective seating of Reseat speaker microphone attempting tymp probe tip component or transducer Defective probe tip Replace probe tip Split or frayed silicone tube s Cut off frayed section of tube or replace tube Defective ADC 236535 LTC Replace ADC Do not use LTC type Causes equipment Broken motor wire Repair broken wire or solder failure on Calvin or solder joint at motor wire joint at motor wire testing also causes NEEDS Error Code 08 02 08 Cold solder joint at Repair cold solder joint at optical interrupt optical interrupt Drive belt off of motor pulley Put drive belt back on motor pulley Defective MCU board Replace MCU board 236330 506 Misinserted Flex Cable Reinsert Flex Cable Top PC Board SECTION 4 MICRO 2 TROUBLESHOOTING MODEL 23641 PROBLEM CAUSE CORRECTIVE ACTION Fails noise test Defective motor Replace motor Pulley set scre
53. open in flex Wrong button detected Bad button assy short in flex 4 Menu Options Main Menu Calibrate Handles This menu item leads to the standard menu calibration process It is used for new handle calibration and old handle recalibration Calibration Tools This menu item is password protected It leads to the specialized tools which can be used to trouble shoot handles B amp K Calibration This menu item is to allow the every day calibration of the B amp K 2231 sound meter 124 dB piston phone is needed to do this adjustment Tools Menu e I2E2PROM Editor Invokes an editor which allows the I2E2PROM contents of the handle to be interactively viewed and changed 85232 Terminal Invokes the serial port terminal which gives directed access to the handle and the sound level meter e Hold Handle Power On Sends a Disable Timer command to the handle This prevents the handle from turning off e Power Handle Down Sends a power down command to the handle This immediately shuts off the handle power Calibration Menu This menu item leads to new menu which provides commands to invoke the major calibration processes Individual Tests This menu item leads to new menu which provides commands to invoke tests to check the calibration of pressure sound and motor sweep speed Calvin Tools Menu This menu item leads to new menu which provides commands to control the instruments connected to the as well as oth
54. pinched C Seeifthe bottom flex is routed per drawing around the L C D boss D Seeiffilter tube is between the pump frame Fully open the front housing A Inspect the arrangement of the mic speaker and pressure transducer B Check the positioning of the pump in the back housing C Check to see if all padding is on pump and back housing D Check the positioning of the pump pads and the top cap pad Correct any problems identified and reassemble the handle Check the handle for noise If the handle is still noisy disassemble the unit and check the handle in more depth Reassemble the unit and recal Do a noise check If the unit is still noisy suspect that the pump assembly or motor is bad Replace pump assembly and reassemble Recal the unit and check for noise SECTION 4 Troubleshooting Guide for MicroTymp2 Handles No Tone Check solder connections from the speaker to the flex Make sure speaker 15 seated in boot and on the SS tube Check to see if the Speaker s SS tube in the probe tip is clogged Flex is plugged in properly to the MCU board Defective speaker Defective MCU PCB No Mic when you put a Check solder connection from the mic to the flex cavity on the probe tip it Make sure mic 15 seated in boot and the SS tube does not recognize it e Check to see if the Mic s SS tube in the probe tip is clogged Flex is plugged in properly to the MCU board Defective mic Defective MCU P
55. pose 15 to perform basic functionality testing of the handle to insure that each of the major components are working These functionality tests fall into two categories The first includes those tests that are an integral part of the calibration process All other tests are incidental to calibration and are performed only to insure that the unit is working These latter tests may be performed during calibration or separately 2 Calibration Process The MicroTymp2 handle calibration process is organized around the following steps calibrate speaker gain pot calibrate microphone gain pot calibrate admittance offset pot calibration pressure offset pot calibration pressure gain pot motor speed table calibration 000000 Additional functional testing is interspersed throughout these tests to take advantage of the equipment setup at the time pressure leak test THD test Vea Check Button test LCD test Tymp Noise Test 000006 2 1 Background Information Each digital potentiometer has an address in the I7E7PROM that the handle will read and initialize the potentiometer to during power up Calvin will determine the best set tings for these pots and store the values in the proper locations during cali bration For brevity is referred to as PROM throughout this document 22 Error Handling When an error is detected the operator will have the option of retrying the test or failing the unit If the un
56. rror message Pressure Transducer Error is caused by blocked tube s Refer to section 4 5 of NEEDS CAL TROUBLESHOOTING GUIDE found MicroTymp2 Service Manual 236409 Home Pump Error can be caused by one or combinations of bad motor cold solder joint bad optical interrupt or loose pulley Piston is off pulley Refer to section 3 5 NEEDS CAL TROUBLESHOOTING GUIDE found in MicroTymp2 Service Manual 236409 END Preliminary Bench Test for MicroTymp 2 23641 SECTION 3 Micro Tymp 2 Noise Test Procedure The purpose to these instructions are to give general procedure fixing noisy Micro Tymp 2 handle 1 2 Verify the unit by testing the unit manually with 0 2 1 0 and 2 4 cavity If the unit is noisy when testing manually proceed as follows A Remove Battery cover B Examine all tubing for kinks bends anything to restrict air flow C sure all tubing is connected to the right place and routed per drawings E Test whole system for leaks Leaks will cause noise in the system Remove screws from front housing Break fiber strips from front housing Slowly remove the front housing from the back housing While disassembling Check to see if the Mic Speaker or Pressure Transducer are touching each other or the front housing If they are this will cause noise in the unit B Check to see if the silastic tubing from the front housing to the ballast is
57. s by referencing your latest bill of materials parts catalog and assembly drawings Part number changes product updates or new test procedures should be noted on the appropriate page of this manual by the manual owner SAFE SERVICE CLEAN AND DISINFECT per instructions MicroTymp2 Operating Instructions PN 236311 PAGE C 50 prior to repairing or calibrating all returned MicroTymp 2 s PERFORM appropriate tests after servicing to assure safe accurate and reliable product operation QUALITY SERVICE WEAR an ESD wrist strap when servicing the MicroTymp 2 or handling printed circuit boards STORE new and used boards in anti static bags UPDATE your Repair amp Training Manual by notating changes and revisions of part numbers and procedures READ AND UNDERSTAND customer comments and complaints on accompanying documentation P O or other correspondence If an injury illness to patient or user or hazardous malfunction has occurred or is sus pected PROCEED NO FURTHER DO NOT disassemble repair adjust or in any way alter the MicroTymp 2 or the printer charger base instead notify your supervisor at once Give them all accompanying paperwork and any information you might have on the return They will take appropriate action according to Welch Allyn policy Check customer service records to determine if this MicroTymp 2 requires or has received any applicable retrofit modifications improvements or i
58. ter and EEPROM Although the Slave and Master don t talk to each other directly using this bus they do use it to communicate with the EEPROM data stored in and retrieved from EEPROM passes through this bus The voltage levels on the two bus lines indicate different things to the microcontrollers In addition if both the Master and the Slave try to use the bus at the same time and error could occur Suggestions With the unit powered up check the voltage levels of TP5 and TP6 They should be around 5V If one of them is stuck at some other voltage check for broken traces or shorts involving that particular circuit Historically we have found that this error can be resolved by merely clearing the error registers powering the unit down and then powering it back on SECTION 8 COMMERCIALLY AVAILABLE ELECTRICAL SERVICE TOOLS Utica lead straightening pliers Xcellite 1 8 NUT DRIVER Screwdriver Phillips 1 Screwdriver Phillips 42 Screwdriver 7 32 5 5mm Flat Blade Pliers long nose Xcelite 51CG Wire cutter Xcelite 107CG Wire stripper Xcelite 105SCG E Digital volt meter with leads 10 Soldering iron 11 Ground strap and ESD bench 12 Tweezers Oo SUPPLIES Item W A Part Loctite Black Max adhesive M 30341 Solder rosin core 020 63SN 37PB M 31446 Cotton swabs Desoldering wick Note The Calvin Calibration System is custom built from the items on the Lotus Spreadsheet on the next p
59. teration of adjusting one pot and readjusting another goes on too many times a failure occurs stating Failure Too many iterations 3 Operational Procedure Initialization and basic functionality checks of the calibration equipment are performed when the calibration system is first booted These checks insure that the calibration equipment is working properly In addition part of the operational procedure should be a step to calibrate the equipment each day or as often as is necessary Once everything is verified the operator is free to pick calibrate handle from the menu The description that follows assumes the full calibration and functionality testing is enabled Establish Communications After a serial number is entered the operator is prompted to place the handle into the base When the operator indicates that the handle is in the base the system will attempt to establish communications with the handle This step will verify that the handle is properly seated in the base and that the handle is alive Note that a communications failure can occur at any point during calibration and testing If it does occur the operator will be notified Errors Corrections Cannot talk to handle Unit not powered up flex or micro problem New or ReCal Prompt A prompt appears to ask if this is a new handle that has never been calibrated or a handle in for recalibration The difference is that new handles will have a full initializa
60. tery symbol disappears REPLACE THE BATTERY UNDER WARRANTY Install a fully charged BATTERY Recycle the failed battery per Welch Allyn s recycling policy 2 b Ifthe unit DOES NOT FUNCTION AND the battery is OUT of warranty put in a fully charged new battery your test battery If the unit functions sell a new battery If the unit does not function look for other problems while charging the customer s battery Sell a new battery if customer s battery won t ACCEPT AND HOLD a full charge NOTES NOTE WEAR ESD WRIST STRAP WHILE PERFORMING THE FOLLOWING OPERATIONS B POWER SUPPLY BOARD TOP BOARD ASSEMBLY B 1 REMOVE BATTERY COVER FOLLOW INSTRUCTIONS IN 2 OPERATING INSTRUCTIONS TO REMOVE BATTERY COVER AND BATTERY IT IS NOT NECESSARY TO REMOVE THE FRONT HOUSING ASSEMBLY FOR POWER SUPPLY BOARD REPLACEMENT B 2 DISCONNECT TUBING FROM TOP BOARD REMOVE TUBING FROM MOTOR PUMP ASSEMBLY REMOVE TUBE FROM BALLAST B 3 UNPLUG FLEX CIRCUIT GRASP PUMP ASSEMBLY FLEX CIRCUIT WITH PIN STRAIGHTENING PLIERS PULL STRAIGHT UP TO REMOVE FLEX CIRCUIT FROM THE POWER SUPPLY BOARD B 4 REMOVE POWER SUPPLY BOARD UNSCREW 4 PHILLIPS HEAD SCREWS AT THE FOUR CORNERS OF THE POWER SUPPLY BOARD LIFT THE CONTACTS FROM THE CASE AND LIFT POWER SUPPLY BOARD STRAIGHT UP REPLACE POWER SUPPLY BOARD B 4 REPLACE POWER SUPPLY BOARD ATTACH TUBING TO THE PUMP AND THE BALLAST REFER TO TUBING ROUTING DIAGRAM ON DRAWING 236300 ALIGN BOA
61. the EEPROM that are of interest AC Historical Slave Error Register and AD Historical Master Error Register Using either the CALVIN station or printer obtain printout of the contents in EEPROM Most likely if NEEDS CAL is displayed there will be a value other than 00 in either both of these two error registers There are some special cases that cause the unit to display NEEDS CAL while the contents of the two memory locations remains 00 These will be discussed later To understand how the error are indicated in the registers you must understand the binary and hexadecimal number systems The error codes are displayed in hexadecimal however the individual errors are determined by converting these HEX numbers to binary and then looking up the value in a table This sounds confusing but it really isn t that bad I will give some examples later on to illustrate my point Below is a table that converts decimal to hex to binary numbers DEC HEX BINARY DEC HEX BINARY DEC HEX BINARY 0 00 00000000 85 555 01010101 170 aa 10101010 1 01 00000001 86 56 01010110 171 ab 10101011 2 02 00000010 87 57 01010111 172 10101100 3 503 00000011 88 558 01011000 173 10101101 4 504 00000100 89 559 01011001 174 10101110 5 505 00000101 90 5a 01011010 175 af 10101111 6 06 00000110 91 5b 01011011 176 b0 10110000 7 07 00000111 92 5c 01011100 177 b1 10110001 8 08 00001000 93 55 01011101 178 b2 10110010 9 09 000
62. the time the event occurred Other information is also logged the serial number the final pot setting with result values and total test time per unit This log should be very helpful for troubleshooting 2 5 Potentiometer Setting Routine Several potentiometers pots are set during this calibration All pots are digital and are set using the same method and routines Initial start values are read from the calvin res file This includes the first pot value to try the target value that we wish to obtain and the tolerance between the target value and the obtained value that is acceptable During calibration a common display screen shows the names of the pots being aligned their current setting the value that was last obtained with this setting the target value that we are trying to obtain the difference between the last two values and the tolerance that is acceptable for that difference When the difference is less than or equal to the tolerance the display line of that pot turns white and the word SET is placed on the line When a pot is being adjusted the past effect of changing the pot is used to calculate the next guess of what the pot should be set to in order to get the target value The term ADJ is placed on the line to indicate the pot is still being adjusted Adjusting one pot often effects another pot This requires rechecking and readjusting these pots until neither pot is changing and both are correctly set If this i
63. troller or MCU PCB clear the error registers power down the unit and re test the unit A D Timeout Error 20 XXIXXXXX Description There is an A D converter inside the Slave microcontroller that is used to convert the pressure transducer value to a digital signal that can be used by the Slave in its calculations This A D requires a certain amount of time to initialize before it can be used properly If for some reason it has been damaged this error will occur Suggestions Replace the Slave microcontroller or MCU PCB clear the error registers power down the unit and re test the unit I2C Bus Error 10 XXX1XXXX Description The I2C bus is a two wire communication link between the Slave Master and EEPROM Although the Slave and Master don t talk to each other directly using this bus they do use it to communicate with the EEPROM data stored in and retrievedfrom EEPROM passes through this bus The voltage levels on the two bus lines indicate different things to the microcontrollers In addition if both the Master and the Slave try to use the bus at the same time an error could occur 3 4 2 Suggestions With the unit powered up check the voltage levels of TP5 and TP6 They should be around 5V If one of them is stuck at some other voltage check for broken traces or shorts involving that particular circuit Replace MCU PCB Historically we have found that this error can be resolved by merely clearing the error re
64. w out of readjust pulley set screw adjustment Fails noise test Defective microphone Replace microphone second pixel high or non existent Fails sound calibration Defective speaker Replace speaker Clogged probe tip Clean probe tip Defective crystal 236543 2362 Replace crystal Defective MCU board Replace MCU board Fails motor speed Set screw too tight Loosen pulley set screw Defective drive belt Replace drive belt Does not recharge Defective battery Replace battery battery Black amp Red wire reversed Restore black amp red wire in back of Tymp handle in back of Tymp handle Shorted capacitor s Replace shorted C17 C18 C19 capacitor s Defective dirty contact Replace clean contact Defective charging Replace Power Supply regulator board Fails Inactive current Shorted capacitor C11 Replace C11 on power drain test Ref Sect 2 supply board 236340 502 Shows EPROM Defective EEPROM 236532 Replace EEPROM check error during Calvin program test Active current drain Shorted capacitor 33uf chip type Replace capacitor too high 236340 502 or 236330 506 PC board Pump motor not finding home Check pump circuit SECTION 4 TROUBLESHOOTING GUIDE FOR 71171 MT2 PRINTER CHARGER Does not power up Fuse blown Does not power up Fuse not blown Note with any board that does not power up check fuses first Does not feed Defective print Does not receive data Power light does not li

MicroTymp 2 Service Manual

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