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AT235 Service manual

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1. 8354 NP q 0 15 lt amp Select 1377 10 5 103 IC104E LD1117S PRG 199 33 1 53 8 Select ISTHE MET 5515 2 lt lt S gt RxDA IC104E 31 IC103A 33 RxDA 1099 33 BDBUS6_PRG C366 ADBUSO 1654 16 NOt NT 1 99 24 1 CO26 8 UART_RxD lt NE 38 FLASH 1C83 28 toon cae MAX4760 MAX4760 1099 28 Sere qu Ne 20 P371 22K6 IC103B IC104F MAX4760 BDBUS6 PRG 1 99 33 1 53 8 Select 1 104 55 9 5232 4 CO26 gt gt TxDA IC104F 30 1C103B 34 TxDA 1C99 33 BDBUS6 PRG GND R369 22K6 GND lt 1 ADBUS1 s 1054 22 NO2 8389 22 6 2 IC99 23 026 16 UART TxD lt lt 2 X FLASH IC83 11 3 1 99 27 BCBUS3_WR Nm 4 1 103 21048 MAX4760 voo e BDBUS6 PRG 1 99 33 153 8 Select 161046 VDD1 Zj 7 1 1
2. Probe select Probe type Probe logic C13 Connected handheld 0 R4 l 4 99 270n 68 Not connected clinical 1 GND V V GND GND 15 Pin Sub D GND Probe Mic N8 6 10n 1 Probe Mic Gnd O N7 13 R2 33K2 R19 L1 8 25 0 GND R20 0 14 1 BL1785 Knowles 10 1 68 1K N13 12 ia TD1 GND SDX01D4 GND _ C7 T 10u CO ome N12 3 8 FOM6 V z 6 VEE1 4 4 5 Press N9 1 2 2 M3 11 V GND MI VEE1 GND IPSI Probe select C9 100 1 MP1 R5 ED1913 1K R6 20K Knowles C5 1000 1 GND Probe Tone 6 7 7 Press2 N10 8 51 275 LEDB N2 7 ED1913 R18 IPSE e NO i Knowles 49K9 IPSI Gnd N3 10 O Probe Tone Signal N5 g 5 R16 10K 1 06419 A 7 16 VEE 4 5 001 01 GND VDD1 lt VDD1 C14 2 A 100 2 15 8 o_ah lt LED G o N6 9 R14 2 ED RGB Remote Key N15 4 24K LM6171 bom AT235 standard R17 15 izati i m nie pisanization Interacoustics A S lt m Tie AT235 Transducer 16 2 V v GND Document Number GND VEE1 xd tr 0004 00007 Remote Key Sheet 1 of 1 Rev PSC PCB no 6690 66905 Date May 09 2003 Page AT235 Service manual page 45 Components Index Top side x
3. ever S oes ou gd 9007 Sl 1 gt CN3 CN5 CN6 CN8 Jumper J1 J7 Function Thermo head Power Pin 1 24V 2 GND 3 GND 4 5V Detector Motor Parallel Port Centronics Keyboard and LED s Place a jumper on J3 to enable restore fonts AT235 Service manual page 26 4 1227 CODEC STEREO PCM3001 IC42 DSP DUAL DAG AD7249 IC8 amp IC9 1216 amp IC17 5 15 8 1 PROBE CH1 OUTPUT 1 0 2048 CH1 1014 1 5 AD2186 77 977 MP13 GND ADC AD7896 DISPLAY 2 0 20dB CH2 2 2 SWITCH CH1UR 4 7 i NAVIGATION CH2UR KEY OUTPUT SWITCH TRANSDUCER M P IC21 VREF LED R LED
4. lu 10 X7R 1027 11 VDDi GND AD8672 IPOTSYM 79 C40 C31 C42 196 1285 _ 12 1 100 22 22 N3 N2 20 10 10 ammi N3 m N2 GND _ VEE1 VDD1 GND GND MP4 VDD VDD1 MEE C3 C16 I es SW1 C DGND vag R44 10 10 GND din SW2 C AGND Vref att SWE AGND GND VEE 1 26 14 Eom SWA C AGND Vref 7 Sheet 4 POT SYM AGND GND AD8672 C22 1 V AD8672 0dB GND SW1 SW1 O 5dB s s SW2 l SW2 O YEEI SW3 1 SW3 O ode sw4 l SW4 O MP1 GND 1 2KH R279 7 10 Pas OB 1 VDD1 GND 15dB NC Sheet 4 A SSM2404 c27 c39 22n 22n R7 VDD1 C4 10 10 Sheet 4 5K36 100p R29 C32 VDD1 22n 1C27 15 196 21K 100 1096 GND VEE1 R11 1 CH1 OUT gt R10 30K1 R16 R30 Ven L1 l IC8B GND Attenuator Sheet 6 AD8672 5K36 c8 L R4 837 10 21 82 5 1 8 21 22 5 C356 _10 1C5 4 10K 1 43 AD8672 0 gt g
5. BLK WHT 5 6 GRN 05 5 gt A o v o en Transducer 66905 TD1 12 C4 Sol o C7 G u gt c UO o gt ORG poz 00 A O M2 M1 o fon 2 6 gt O 73 c O SubD 15pol male connections Pale pink Press Dark red LED B White Black shield wires EE The 2 shielded wires Probe Mic Gnd Dark green are not connected to the PCB Probe GND Pale blue IPSI VEE Violet IPSI Gnd VDDI 00 Grey Beige LED G Press1 Dark blue Yellow T Chocking pink Tube Connections Transducer T pipe Probe Connector ral Tube Tube Pale blue Dark blue Brown Tube from Cable AT235 Service manual page 24 Transducer Spare parts ATP AT235u Transducer Part number 80300201 AT235u Probe clinical AT235u Probe diagnostic Part number 80310101 Part number 80310201 Silicone hose Part number 38000201 40mm Kit probe module with wires 050 Part number 80310601 Gasket Part number 34111201 Probe tip Part number 34626003 Cap Probe Part number 31423502 AT235 Service manual page 25 Printer Connections O
6. 148 67 MEM LCD 55 34 8 vdi VDD NEE 18 vd2 0 vd3 Pump Motor Driver Nar a Pp 9 j 0 9 4 vd5 um vd6 VDD Naaa vd7 o 1 2 VA2 VS C298 85 va4 L 220n 84 5 10 VDD1pmp La 8 7 VDD E 10 20 gt VAT a GND lt 1 Bud vag 80 9 C300 C301 C226 232 C223 R266 10K 27 10017547 00 vdi 22 22 22 Sc 18 109 109 109 e X 1642 87 DSP 10 ENABLE VBB1 gt 0 0 ve 1C42 86 DSP fl1 DIR VBB2 R181 vps 28 D GND R272 10K 5 1642 85 DSP 12 STEP wm 10K OW T vd5 R271 R267 10K RESET GND_pmp 62 9 vd6 22K6 R273 10K he ouriA L4 CO19 1048 38 MEMRDY VDS vd7 vd 0 7 R274 NP 12 25 OUTIB OUT1B MEN YGV610B GND 2 OUT1B TA Pump Sheet 1 SEL VDD 12 Motor 1C48 66 1O LCD gt gt ISEL WE OUTRA 2 2 _ Output m R270 R268 30 1 OUT2B 4 5 3V CAS 1 108 4 CO16 22K6 220n nie R269 30K1 lt SENSEI be RC2 eR FLM 12 s c Tn lt lt SENSE C227 22 LC 9199 100 DM aed xi SCK1 2 10 SCK 2 V C295 1 RI A3977LP C302 C308 5 NPO x Ta SHO
7. 105 12 288 2 C104 11 C151 C137 VDD x A T H 22p 22p Power Supply zp 22 Digital Signal Processor gt ono 5 16 67 2 5 VDD 45V NPO 4 GND JL Stereo VDD1 11V 1K ej g VEE1 11V GND GND 9 ES C106 VEE2 17V to 22V 4 ul x H zijo x k E 100p 2 5V 13 2222222222 02 VinL a Vref 5 0V CIKN gt gt gt gt gt gt 6666666666 Qgomluuluo 9 GND Vref V 2 RELLLLLL c N 1 108 4 RESETS gt RST Q4 0 Cin L Webpmpe sov 100 4 RESET S gt 44 RESET 94 Q5 1 52 VDD 17 cas en NPO OUT IC9 4 057 LB BLM18PG121SN1D aris 470p 8 9 M BGH 020 81 16 1 voo H Cin L 2 IOMS 019 72 C138 C257 Q9 4 VCOM gt gt Vref_source 1022 3 Sheet 5 BMS D18 VrefL 100n 100n DMS D17 10 10 GND Q11 FH5 R138 8135 CMS Die Q12 H VrefR VoutR 2 OUT IC17 100K 100K 5 015 GND 74HC4040 318 C319 1 Local Power Supply 5 ae 4u7 4u7 077 esa NPo GND VDD1 Sheet 3 GND 10 10 470 BLM18PG121SN1D 0 ADSP 2186
8. R19 4K22 VDD1 C25 100p 1 A MJD122 R20 15K4 C24 22p 5 Ti am C13 220 10 VEE1 VDD1 7 A ND 20dB CH1 1 R18 G R21 1K69 22n 22 SIIN 81 OUT 10 10 IC1 100 GND 6 220 GND GND c9 10 Ne AD8671 220 X7R IC1 109 n Xm R17 NC VDD gt o MJD127 NG gt GND VEE gt VEEI VDDi GND VEEI NC 15 Swt C DGND cN veer 2 NC D VEE1 SW2 C AGND 2 clo 6 SUC 12 22n 22n GND 19 1 10 10 uu 016 _ 2098 CH2 AGND E Output Amplifier 15 52 CTRL E V GND LH swi sw1 0 GND H swzi sw2 o n Es 19 sw3 1 sw3 0 H nes 4 20 SW4 O 120 VDD1 GND 1 69 N pue C54 22p 5 C29 C20 C14 20dB SSM2404 NP0 kw 220n 22n 22n 1096 10 10 VDD1 7 A GND GND 1 ma IC19 IC12 100 GND C51 79704 R62 6 220 025 _ n 527 sm C30 1096 AD8671 KK 220 X7R V 10 GND Nubia X7R IC18 VDDi GND VEE1 V NC7ST04 A A VEE1 C44 C62 V 22n 22n GND 10 10 V VEEt1 VDD 85 5 22n 22 GND lt gt GND 10 2K 10 X7R X7R o N 52444524 017 44 ory VDD T CE 019 CONTRA on off 4 OUT20 R BONE on off uai NC 8
9. VDD1 R8 10K C5 10p R10 47K5 Frequency Frequency Intensity Intensity Decrease Increase Decrease Increase Extended Range COL6 COL7 7 015 Only Instruments with High Probe Tone IC3 SW1 Aout Ain Bout Bin pus Cout Cin Dout Din 12 L Intensity Touch Switch Eout Ein GND Not standard Fout Fin 0 GND VDD lt 8 VDD oscin H 16 115 10 8 9 10 10 7 1 9 oscou X7R V MC14490 GND 52 Shift 3 4 9 10 15 17 19 a FM er CEN EN CERE O O O e O O O O O e Pause Tymp Reflex Ipsi Contra EFT Audiometry Man 1 O O Store No Response 518 57 o n 0 i High Delete Probe Tone 40 0 COMDATA 25 ___24 V GND 20 220n lt 10 X7R D10 LL4148 VDD A 220 10 X7R GND R3 N 4 4070 10K 10 10 V X7R GND GND GND VDD A RI 2K LED ADJ 6 86857 10 lt 10 10 X7R 10 X7R DD GND T ERN VDD 23 x 4 Left 5 Right High Tone Print Print Screen Man Audiometry Ipsi Reflex Tymp Pause Power Supply VDD1 12VDC VDD 5VDC GND NP
10. He eo aud axe ede Up ad ds 10 Status me gera eee tc deti Hd es 11 IPSI Calibration iic Et aed lee ite He td dE dd ebd ae He eee o dae ee 11 Setup dert o t cde a t o Re Hg ee eed up e e Li 12 Online GommuniCaltlOn efe He ee ed UL dae dte todas 14 Cochlear Implant 1 iine ipee tei dd De a e o He He ee t p eed o c 17 Communication in Windows 18 Appendix B 5 uuu qaa i uu Sau saam eu pado 1 Set p NavigatlOln a ids ss Sim Fonte ete tn ete ea tne assis Re read duke etu 1 User Setpa EET 2 Setting p Reflex 3 COMMON Setup a ns tec easier POR ptas 11 EE 13 Appendix C Advanced User Setup J U U U U u u u u u uu u uu u 1 Advanced User dae deg guae pa 1 Advanced Reflex User 3 Advanced Audiometry User Setup ccccceccceceeeceeseeeteneeceeeeecaaeeseaaesaeeeceaeeseaaeseeaeeecaaeeseaaesgeaeeseaeeesaeseeaaeesnees 5 Letter Printout Error Internal printer nennen reser sins entrent 8 Storing Restor
11. E f Y A m 131 221 gi naa Ede el Fk IN 7 ES corel M Ims oor E o BZGZABU Seu D 0 e f sdb ross 2008 5 s n ES 5 U E 08 5 amp EJCO e FF 8 N ae sera m oun 2j i EE E 0 i g BZEZAN rw E BZSZAOV ors gt 8 P em b dei 5 08 Lae TEC Ee D E E am Em VOVCHES i 08 ua 89 ES ni re 1 Bep 25 PT 5 ez z H B c O o Edu 08 5 8 CR 8 5 2 Bet og 2 eles en ee am E 0 472 Fl 8 BZGZABU AP 7 b n e EJ 08 R261 ojo o 5 E L o i Title el N umn in L m n c Ez m gt 69010807 001009205 Drawingnn AT235 Service manual page 38 board List 69010807 Assembled Board 51007410 Part ref Part No Desciption Description 2 17 C1 C7 C25 C32 C34 C42 C49 C50 C55 C84 C88 C106 C117 C124 C140 C141 C288 61400201
12. 5 RESET S S L A7 DRAME A Be 41 ir 8 715 258 GND 7 PBS 36 VEE2adj 1 71 2 B5 lt __ pO DRAM 27 2 on off ic71 3 6 14 7456MHz Ries A10 DRAM9 Ss al PB7 B CSSRDY BSY 1 76 1 B A Ps 23 GND 2K21 A11 DRAM10 BRDY 23 BRDY A12 DRAM11 c hoi BSTB 19 98 IS DP vod A13 DRAM12 A14 DRAM13 c9 c Ne 25 x 2 NS 25 C222 A15 DRAM14 41 gz NC 22n A16 25 30 42 6E 325 vp 40 ioRG 17 43 40 TORG GND 245 GND 22n ee 18 T 44 R167 284 20 GND A19 51 BE GND 9 c8 20 54 52 7 154 200 A21 CS5 54 1253 a PERO 55 dBiA CO155 RST Q4 56 dBiB 156 i IC52C 8 IC33 25 n 6 13 74HCTO8 CLK1 158 9 4 U GND Q7 0 CLK2 1 24 24 as 12 4 v CLK3 CO9 2 12 CLK W IC54 8 2 VOIGCK2 V USB 5V 0254 09 10 Sheet 2 BW H z Select IC104 22 24 c19 dr3 OE MC68306PV CE H o asR VDD AS RESETS VO GTS1 VDDio 40 18 GND 74HC4040 DTACK 1 108 4 C150 dB2A GND dB2A CO157 GND BERR 51 d aw eno VDDio 39 dB2B CO15 8 f CLK6 1
13. obtainable selecting Ext Range the set up AT235 Service manual page 4 Specification of input output connections Inputs ________ Electicalproprtes response 6 3mm stereo Handheld switch 5V through 10kQ is forced to gnd level when activated _ 5 Pin 1 NC Pin 2 Grey RXA1 Pin 3 Violet Sync clk Pin 4 White VDD 5V Pin 5 Black Gnd j Left Right Jack 6 3mm mono Voltage Up to 5 5V rms by 100 load Min load impedance 5Q Phones Contralateral Jack 6 3mm mono Voltage Up to 5 5V rms by 10Q load Min load impedance 50 15 1 Press 1 signal in 2 12V in 3 12V in 4 Remote key in 5 Probe tone in 6 Mic signal in 7 LED blue 8 Press 2 signal in 9 LED green i Ipsi Stim Gnd i Ipsi Stim Signal i Probe tone Gnd i Vref 5V i LED red Data OO T USB USB type B USB port for See appendix A in service manual for detailed communication information AT235 Service manual page 5 Calibration properties Calibrated Transducers Contralateral Earphone Probe system Audiometry headset Accuracy General Audiometer and Reflex Frequencies Contralateral Reflex and Audiometer Tone Levels Ipsilateral Reflex Tone Levels Pressure measurement Compliance measurement Impedance calibrati
14. m B Vref pmp VDD1 lt _ TP32 VEE1ZL 15 7 R290 AD8671 3K09 7 10K RC2 13 2 13 13 5 gt GND Mic GND TP34 12 4 6212 TP35 11 3 lt 1 51 RL4 m ea s 10 2 D GND IPSI GND gt GND 8 gt gt DSP 8105 R366 BUSK RC2 10 LED B 9 lt DSP pf6 I 37 2K 2K 1 42 29 29 PRESS2 TP38 To Transducer E Vref icy RC28 aoi 5 2 amend Probe 1 27 LED_R TP4O Remote VDD1 I Manual Pump Control 26 DATA 41 Key VDD1 Keyboard Control Panel ref pmp 2 5 ND s 8177 Optional RC24 Ope T 8365 576 C136 RC23 qe IPS gt gt TP44 1 5 22n RC2 2 GND lt 45 Located the 2 IC57A R183 RC2 1 Transducerboard 324 1 r3 2 LED G TP46 GND e ERE i LM6142 4 1 1295 Vref Sheet1 BC847 100K R184 GND eat LEDBY 5 R368 1 10 1K5 R188 74 08 1 55 35 5 62 GND 225 C119 ee gt R310 22 u 2K21 GND LED RY A GND DATA 8311 NP 1055 33 GND GND ND T Ld 1 1054 104 BC847 191 LEDGY T7 4K75 nis 1655 34 798 GND IC57B Ri87 22 T 25 7
15. StringToCalculate Insert StringToCalculate GetLength 1 CRCString return StringToCalculate This function receives data form the com port The MSComm392 control generates an event when characters arrives at the com port and if any errors occur see documentation of the MSComm392 control void CTestAT235Dlg OnOnCommMscomml 235 18 InStrinoVar CHAR ch DWORD LastPosition switch m_CommControl 2 GetCommEvent InStringVar m CommControl GetInput InString InStringVar bstrVal LastPosition InSt ch InString GetAt if ch 4 The deal with InString Empty break ring GetLength 1 LastPosition EOT is received the data in the InString AT235 Appendix A page 19 Appendix User Setup Set up Navigation Entering the Set up Press lt shift gt and the instrument will return to the AT235 Main menu from any selected menu Press Set up F2 and you will enter the user set up of the AT235 Navigation In each menu is possible to move a bar see figure 1 trough the set up items and change the settings for the set up item Sub menu Menu Setur Power ur Tyme and Reflex Menubar Setup Menu line Change Item 27 Navigation Keys Menu Keywords Figure 15 Pressing the arrow down F2 or up F3 the menu bar moves and by p
16. 100p 1 50V 0603 Capacitor ceramic NP0 92 C2 C3 C4 C10 C11 C12 C14 C16 C20 C22 C26 C27 C28 C31 C33 C35 C36 C39 C40 C41 C44 C45 C46 C48 C52 C56 C57 C59 C61 C62 C63 C64 C65 C68 C70 C73 C74 C80 C81 C85 C86 C92 C94 C96 C127 C131 C136 C143 C144 C150 C154 C156 C161 C163 C166 C168 C171 C172 C178 C182 C184 C186 C187 C194 C198 C199 C206 C208 C209 C211 C213 C216 C219 C222 C223 C225 C226 C228 C229 C232 C236 C249 C251 C252 C256 C258 C273 C312 C314 C315 C334 C378 61400101 22n 10 25V 0603 Capacitor ceramic X7R 12 C5 C17 C67 C72 C160 C170 C274 C305 C306 C307 C324 C355 61401601 1 10 16V 0805 Capacitor ceramic X7R C6 C8 C53 C58 61401701 10n 1 25V 1206 Capacitor ceramic NP0 C9 C13 C23 C29 C30 C51 C75 C91 C93 C125 C147 C193 C291 C296 C297 C298 C299 C353 61414301 220n 10 25V 0805 Capacitor ceramic X7R C18 C43 C60 C69 C247 C294 C295 61401801 1n 1 50V 0805 Capacitor ceramic NP0 83 C19 C89 C90 C99 C112 C116 C120 C121 C123 C128 C138 C139 C155 C164 C167 C181 C188 C190 C191 C192 C197 C201 C202 C203 C205 C207 C210 C214 C215 C217 C218 C220 C221 C224 C231 C233 C238 C239 C240 C241 C242 C243 C244 C245 C246 C253 C255 C257 C270 C271 C272 C292 C300 C302 C303 C304 C322 C323 C330 C331 C335 C337 C338 C339 C340 C341 C343 C344 C347 C348 C366 C368 C369 C370 C371 C372 C373 C374 C379 C380 C381 C382 C384 61401102 100n 10 16V 0603 Capacitor ceramic X7R C21 C24 C47 C54 C104
17. 2 0 Off 1 0 Off 1 LP __ 57 0 1 0 1 Autotest upper limit 90 90 dB 110 110 dB steps of 5 dB Default manual intensity 63 60 60 dB 110 110 dB steps of 1 dB AGC for IPSI reflex stim 0 Off 1 On Advanced Audiometry Audiometry Headset 0 10 TDH39 11 EAR3A Default Intensity 0 10 10 dB 70 50 dB Manual Audiometry Audiometer Frequencies 125 2 ___ 2 6 0 Of i On 2702 _ B80 Of i1 O 10 11 5 dB 18 40 dB Automatic Audiometry HW Frequencies 12214 125 Hz 2 1252 3000 Hz 11 Display Reflexes Compliance Change Stimuli Selection 2 250 2 750 2 15002 2 3002 2 4000 Hz 6000Hz 8000Hz AGC for IPSI reflex stim ______ 8000 2 0 Off 1 10 2 out of 3 11 out of 5 AT235 Appendix A page 13 Examples of Transmission All ASCII characters are separated form control codes with 00 means two byte each representing a zero 1 Transmitting all EEPROM data from the Instrument Master STX 00 US 00 US SOH GDE100 US EOT Slave STX 00 US 00 US SOH GDE100 US data Ex 2 Sending all EEPROM data from the PC to the Instrument Master STX 00 US 00 US SO SOH GDE100 US data Slave Nothing Master STX 00 US 00 U
18. 5 GND R322 el Gib Power Supply 100K ee ee R190 gt gt Probe select 1655 10 Sheet 1 V 45V l R291 10K 10K C355 GND R312 opi 1654106 GND OV 7 87 1 VDD1 11V 10 VEE 11V X7R R72 10K VEE2 17V to 22V V GND VDD1 2 5V GND GND Vref_pmp 5 0V IC65B R193 VDD1 50V 7 gt gt REMOTE KEY 1 55 16 21 Vref_pmp R69 Moi AME Sheet 1 VDD1 10K C78 LM6142 14K3 Vo 10 100 R194 C65 20 10K 22 AD8672 VDD1 4 GND TR 5 08672 1 65 C211 GND REF 02 20 GND GND Title i ND ya Mainboard 050 051 052 053 GND VEE1 Partno 69010807 NB GND Interacoustics Drawingno NP Not Present D02000307 050 051 052 AT235 Service manual page 33 gt gt dsp vdd 1 6 Sheet 7 1
19. 021008 i ND TRST GND DIS RC6 4 Sheet 2 R160 cota cgo VDD x pen Tile Mainboard 050 051 052 053 apol EECCEREEERE 4K75 22 GND G2B Y7 Partno 69010807 V J 74 138 Interacoustics GND Drawingno NP Not Present D02000307 050 051 052 AT235 Service manual page 31 0 z C247 in 1 Date Constr Appr Constr 300501 AMJ HBJ sheet Revision 021008 PSC OG 2 of 7 VDD VDD 273 272 dis TSW Remote GND TSW Remote 4 1055 31 25 pin Sub D Connector gt gt TSW Sheet 1 Sheet 1 UN RESP S 620 1055 17 d 14 Auto Feed XT Pat Res 4pol 100n R234 lt 1 1C54 92 Data0 2 10K VDD H 2 1054 75 Error Connected to TSW Remote V Sheet 1 Sheet 1 Data 3 Pat Resp GND VDD lt 3 1654 90 ee 89 16 Init GND GND lt gt 4 05492 1654 82 4 GND GND H 5 1C54 89 1 54 90 PD1 1C54 80 46 1 54 78 1 54 89 Datas 5 lt 7 1C54 88 1C54 87 PD4 1 54 88 Data4 6 208 19 25 1 53 15 COMDATA E gt 2 105487 5483 1054 84 5 7 Sheet 1 651 12 TSW 10 1 54 8
20. 167 2232 100n 100 1001 1001 100 100n 100 1001 1001 100 Tile Mainboard 050 051 052 053 V V V V V V GND GND GND GND GND GND GND GND GND GND GND GND Partno 69010807 DSP 2186 1042 Sheet 4 Interacoustics Drawingno NP Not Present 002000307 050 051 052 235 Service manual 37 Components Index Bm 8422 2522 210 4421 1 E 589 000 a di 882 COW T E g ES 000 B m Or 52 Mo 4 4 15 1200 gt e core Pon LABEL SMD LABEL HMD PHA 9931 8193 at R29L R177 5255 mE HE C222 8195 9 7440708 C104 Cocss7 R357 RsssD Corsss Fila gl Og 005 C33 8 8 i 0 C211 2 ipc o i IC83 C369 8484 38 58 000 00 00 5 0 E 1 1474 R313 IC98 2 205 78522 Cocss R1720 08 59010808 9 ObO Hyt ce TOI costa aera 5 a S IH Us 2178 82 152 2 COR130 8132 21007 L9 Rissa 8129 22 10161 P DD m og z ll 5 H 9 zwar Sha BE ae
21. calibration levels extended range settings and filter settings but leaves the set up data untouched The Total function Total F6 is a function that is designed for pre calibrating the EEPROM if the IC are replaced The function inserts values into the calibration and the set up that lies close to the final calibration Note Using the and the Total function always requires the instrument to be recalibrated AT235 Service manual page 20 Disassembly Open Cabinet Remove 2 Torx screws A use Torx tool T20 Remove 3 EMC screws use PZD1 tool The main part of the two piece bottom plate can now be removed for calibration For exchange of the pump tube remove 2 Torx screws Torx tool T20 Pump Tube Connections 1 amp 4 Wire connections from pump to Main board CO19 2 Tube from air reservoir to pump Part number 38004101 length 85mm 3 Tube from air reservoir to Rear Panel Air Pipe Part number 38000301 length 320mm AT235 Service manual page 21 Pump Tube Loosen the spring fixing screw 1 unhook the spring 2 and the pump arm 3 can be drawn out Remove the screw 4 and the tube fixing plate is loose Spare part numbers Pump complete 56000201 Pump tube complete 56002301 After the screw and the tube fixing plate is loose the tube 5 can now be pulled out for replacement For reassembling Put in the new tube and mount the fixing plate Push in
22. 012 0 A X5R X5R 5 PCM3001 1 41 8 DSP 7 gt TRO2 PF7 011 ___29 69 156 22 V V COG gl C90 1C41 7 DSP pf6 28 pio GND Cin R 1005 1235 6 DSP pf5 5 8 v 10 28 IRQE PF4 08 R120 IC95 VinR VDD OA a TP99 DGND of PF2 MODE C VDD toe 4 PF1 VODE FLO DSP 10 1 78 11 2 FL1 86 DSP fli 1078 6 Sheet 3 SERS LRCIN VccADC GND Test point FL2 H8 DSPfl2 1 78 7 VDD BCKIN GNDADC 8139 PWD A d DIN COM UR 100K PWDACK C315 22n GND GND GND CO12 toz 2 VccDAC VDD CO13 TP48 085 5 osoqd oX RESET gt RSTB GNDDAC ONDE V 55552558 prore R121 GND 1096 1 100 4 GND 56205 8222222225222222 EcroGao i 6062 5062 99 1590 EMTO MP13 Test ids did cd NC7STO4 roe EMT GND lt GND q1 G TP52 GND lt FMT2 02 1 CO24 6022 0022 023 GND lt TP55 l 56 1022 5 Vref_dac lt lt REFOUT COB2 08 2 6083 57 d 0 15 7 REFIN 58 VOUTA GO32 082 IPSs 1048 72 DSP WR L3 TP60 1 48 70 DSP RD BOR SDIN 3 GND lt _ TP61 Sheet 1 48 73 DSP AL 200 SYNC 1026 CO441 1040 0
23. 1 0 1W 0603 Resistor 4 R17 R48 R279 R280 60401301 10R 1 0 1W 0603 Resistor 3 R18 R49 R199 60401201 100R 1 0 1W 0603 Resistor 2 R19 R50 60424301 4K22 1 0 1W 0603 Resistor 4 R20 R26 R162 R264 60424501 15K4 1 0 1W 0603 Resistor 2 R21 R27 60424401 1K69 1 0 1W 0603 Resistor 2 R22 R68 60421301 6K81 1 0 1W 0603 Resistor 2 R24 R59 60403701 1K1 1 0 1W 0603 Resistor 24 R25 R60 R107 R115 R146 R149 R150 60401101 4K75 1 0 1W 0603 Resistor R155 R158 R160 R164 R169 R180 R182 R191 R196 R197 R198 R201 R219 R304 R305 R306 R307 2 R30 R39 60400401 82K5 1 0 1W 0603 Resistor 4 R31 R35 R54 R65 60403001 4K99 196 0 1W 0603 Resistor 12 R38 R73 R265 R270 R271 R355 R369 60423401 22 6 1 0 1W 0603 Resistor R371 R373 R374 R375 R376 2 R71 R367 60402001 20K 1 0 1W 0603 Resistor 4 R75 R105 R321 R366 60400901 2K 196 0 1W 0603 Resistor 11 R76 R111 R117 R202 R203 R207 60402501 47K5 1 0 1W 0603 Resistor R211 R212 R215 R216 R217 AT235 Service manual page 42 PCS Part ref Part No Desciption Description 2 1 R90 60420301 49 9 1 0 1W 0603 Resistor 4 R98 R154 R235 R236 60401801 200R 1 0 1W 0603 Resistor 2 R103 R113 60402901 2K49 1 0 1W 0603 Resistor 1 R104 60424601 3K09 1 0 1W 0603 Resistor 2 R120 R121 60425201 82R5 1 0 1W 0603 Resistor 6 R135 R138 R139 R324 R325 R326 60401701 1
24. 18 33502401 carbon Switch 14 55 56 58 512 514 516 18 35303601 screw 7 55 56 58 512 514 516 518 36302901 xmkn0008 1 T1 64600101 BC857 1 T2 64600401 BC847 AT235 Service manual page 30 lt d 0 15 CD Test point l GND CO11 1 IMS 3 IC99 33 BDBUSG PRG iion 101 2 1 27 28 00112 e m Nc7Szos 22RESET S 026 6 1654 33 100 VDD 649 5 RESET gt C010 TP6 VDD 60102 7 VDD C343 00103 8 R144 VCPU 49 100 I 10 PAD1 C182 1549 6 RESET gt 0211 RxDB TP10 Z sense LE a his CO212 1 2 12 RESIN VDD C0213 12 RESIN es S 10100 2 IC99 4 1 83 12 ypresets 10485 662 61 60214 3 6 RESET 1 101 4 1 108 1 ZI co ase RES 178 1 VDD IC110 GND VDD 173 C164 TL7705A 1K ioo sate E 100n GND gt 2096 NC7STO4 910 4 2 EE C249 C252 C251 I C172 GND TE 22
25. 5 100 C199 Printer 10 20 20 22 GND GND X7R R157 10K TP103 GND GND GND VDD A 032 gt GND 100 1 8 127 8209 3R01 SL23 220uH 3 2 GND C238 R210 3R01 Suppl 4 8360 0 101 8206 ___ 3RO1 5 100n uh 1 235 R205 3R01 6pol 53 Power Supply 47 VDD1 20 VDD 5V GND GND VDD1 11V C185 VEE1 11V 05538 2 2 20u VEE2 17V to 22V 209 155 37 VEE2 on off gt ON OFE F5 E oV 5 021 Vref_pmp 5 0V td GND Mod M 749 5123 237 234 20 10 126 407 407 X7R 33uH 20 20 GND R364 ND GND G NP Mainboard 050 051 052 053 GND Partno 69010807 GND Drawingno NP Not Present D02000307 050 051 052 AT235 Service manual page 32 VEE2
26. Compl21 US Press22 US Compl22 US EarVolume US NumberOfPoints 06 StartPressure US EndPressure US PumpSpeed US GS Pressure1 US lt gt US GS Pressure2 US lt 2 gt US GS Pressure3 US lt Curve3 gt Curve Pressure 0 US ml 0 US Pressure NumberOfPoints US ml NumberOfPoints US EOT Volume US Pressure1 US Press11 US Compl11 US Press12 US Compl12 US US GS Pressure2 US Press21 US Compl21 US Press22 US 22 06 EarVolume US NumberOfPoints 06 StartPressure US EndPressure US PumpSpeed US GS Pressure1 US lt gt US GS Pressure2 US lt Curve2 gt US GS Pressure3 US lt Curve3 gt Curve Pressure 0 US ml 0 US Pressure NumberOfPoints US ml NumberOfPoints US EOT Timebase US 1 US Close1 US Open2 US Close2 US Open3 US Close3 US Press1 US Press2 US Press3 US 2 Left Ear Right Ear Header Description GPRE00 ETF2 Right Ear Timebase US Open1 US Close1 US Open2 US Close2 US Open3 US Close3 US Press1 US Press2 US Press3 US AT235 Appendix A page 8 Get Data Header Description Format SGGA00 Get All Data Old format Returns with all data stored Look for headers in the return string and see in this manual for format description The Tymp and the reflexes are transferred in the old format Header Description Format SGGA01 Get All Data New format Returns with all data stored Look for headers in the return string and see in this
27. Dual RS232 When the Driver is found the following window appears Found New Hardware Wizard Completing the Found New Hardware Wizard The wizard has finished installing the software for USB Serial Converter Click Finish to close the wizard Click Finish the Found New Hardware Wizard now starts over again because driver Serial Converter needs to be installed follow the directions above The Driver for the USB Serial Converter is now installed to find out which COM port to use when communicating with the instrument start the Device Manager Click Start My Computer gt properties Hardware gt Device Manager The Port is recognized as USB Serial Port use the one with the lowest number Device Manager 515 File Action View 3 Computer lt lt Disk drives Display adapters 2 DVD CD ROM drives Floppy disk controllers Floppy disk drives 9 IDE ATAJATAPI controllers Keyboards Mice and other pointing devices Network adapters Ports COM amp LPT Communications Port COMI 47 Communications Port 2 27 Printer Port LPT1 27 USB Serial Port COM4 7 USB Serial Port COMS Sf Processors Sound video and game controllers System devices Universal Serial Bus controllers If the port number is high
28. EN 60645 1 Contralateral Earphone tone Wide Band noise WB Spectral properties Low Pass noise LP Spectral properties High Pass noise HP Spectral properties Ipsilateral Earphone Pure tone Wide Band noise WB Spectral properties Low Pass noise LP Spectral properties High Pass noise HP Spectral properties General about levels ISO 389 1 for TDH39 Interacoustics Standard As Broad band noise specified in EN 61027 but with 500 Hz as lower cut off frequency Interacoustics Standard Uniform from 500 Hz to 1600 Hz 5 dB 1000 Hz level Interacoustics Standard Uniform from 1600 Hz to 10KHz 5 dB re 1000 Hz level Interacoustics Standard Interacoustics Standard As Broad band noise specified in EN 61027 but with 500 Hz as lower cut off frequency Interacoustics Standard Uniform from 500 Hz to 1600 Hz 10 dB re 1000 Hz level Interacoustics Standard Uniform from 1600 Hz to 4000 Hz 10 dB re 1000 Hz level The actual sound pressure level at the eardrum will depend on the volume of the ear See Table 2 for details AT235 Service manual page 6 Reference values for stimulus and audiometer Variation of ipsi stimulus levels Sound calibration for different volumes of the ear attenuation canal values for Relative to the calibration performed on an TDH39 IEC 126 coupler earphones using MX41 AR ISO 389 2 Interacoustics Standard IPSI EAR3A TDH39 Ipsi CI
29. G LED B Aa n gt gt LEDR LEDG LEDB RIGHTPH CH2 IPSI CH2 CONTRA CH2 CONTRA BONE CH2 LEFT RIGHT Not used 1C97 IC98 IC103 IC104 DATA SWITCH C76 RAM EEPROM IC62 YGV610B V5 12V 24V CPU m KEYBOARD RESPONSE o IC57 IC89 IC90 PROBE SEL NAV LED R LED G LED B TONESWITCH PRINTER KEYBOARD PCB PRINTER PRN240 INTERNAL TALK FORWARD P9 IC31 Date Constr Constr 160800 5 HBJ Sheet Revision 180107 oG Title Blockdiagram 050 051 Interacoustics Not Present AT2 Partno Drawingno 202018501 35 Service manual Page 27 2 OMONDAARWNM COMDATA LED ADJ m G O1 O cO 20 21 22 23 24 24pol NP cot 1 2 3 dB1A 4 4818 7 ROWO 2 ROW ROW2 10 ROWS 13 14 15 9 16 COLO 8 COLI 17 COL2 8 6 COLS 2 5 COL4 0 1 COL5 COL6 2 COL7 2 24pol NP gt VDD1 L VDD L VDD L GND L GND TSW IN TSW CLK CLK3 COMDATA SHIFT LED ADJ ROWS GND 10 10 X7R GND C11 10n 10 X7R VDD1 VDD VDD C15 C14 C13 220n 220n 220n 10 10 7 X7R 10 X7R GND GND GND R7 10
30. L FF2 on off i 3 4 NP RL6 v req 470 1 i 6 L INSMASK on off 2 gt PSI RL8 3 NP _ R286 R289 8372 R378 470 470 470 470 817 4701 I 6 1 1 1 017 PHONE on off 2 GND 3 Ela AQV252G RC1 al LEFT PHONE RR 1 T RIGHT PHONE pa V rel CONTRA MASKING 5 ps 018 IPSlon off 2 FREE FIELD 1 3 3 FREE FIELD 2 FST ETS INSERT MASKING RC2 3 wall RL9 8 v 18348 470 8 6 019 on off 3 AQY212S 2 8350 470 RL10 6 DIP16 i GND Output 020 _R BONE on off 2 AQV252G RL11 v req 88 470 6 921 R FF1 on off sip R281 est po 352 470 1 6 470 t RC1 16 LEFT PHONE RC1 15 RIGHTPHONE 257 022 FF2 on off 3 1 14 7 CONTRA MASKING 3 4 GND R6143 ______ NP 112 FREE FIELD 1 111 7 FIELD 2 2 1 R282 RC1 10 _INSERT MASKING 2 353 470 1 RL13 6 470 V_rel lt t 1 GND lt TP85 023 R INSMASK on off i DC CN TUO MM GND uu Power Supply VDD 45V GND VDD1 11V Output Relays VEEI 11V 1 108 4 RESET gt Vref 5 0V Mainboard 050 051 052 053 Partno 69910807 Interacoustics Drawingno Not Present D02000307 050 051 052 AT235 Service manual page 36
31. On oor Description Selects 10 draw line to not heard symbols or not Manual Audiometry Audiometry Frequencies Factory All frequencies are selected as factory setting Range 125 Hz 250 Hz 750 Hz 1500 Hz 3000 Hz 6000 Hz and 8000 Hz can be selected as On or Description Use the frequency keys to select the desired frequency and press Change 1 to select or Off Frequency Jump Mode Factory Bottom Range Bottom or Butterfly Description Is used to select how the frequency jumps when activating the frequency keys Bottom Trying to increase the frequency selection beyond 8000 Hz will cause the frequency to jump to 125 Hz ready to perform increasing frequency selection Butterfly Trying to increase the frequency selection beyond 8000 Hz will cause the frequency to jump to 1000 Hz ready to perform decreasing frequency selection Trying to decrease the frequency below the lowest frequency will cause the frequency to go to 1000 Hz ready to perform increasing frequency selection Tone switch Factory Man Range Man or Rev Description Is used to select how the Toneswitch controls the sound stimulation Man The sound is presented to the patient when the Toneswitch is activated Rev The sound is presented continuously to the patient until the Toneswitch is activated AT235 Appendix C page 6 Intensity Stepdown Factory Off Range 5 10 15 20 25 30 35 40 dB Description Is used to selec
32. The AT235 can hold information for two reflex tests Reflex Test A and Reflex Test B Each test can hold setup options for 6 reflexes expressed in the table in the bottom of the screen figure see figure 5 The upper part of the screen describes how and with what method the 6 reflexes will be taken So the reflex setup is a matter of determined the start conditions for each of the 6 reflexes in the table output stimuli level and if in use or not and with what method the reflex will be taken Note that it is the same method for all 6 reflexes If you want one reflex with one method and another reflex with another method use Reflex Test A and Reflex Test B menu for Reflex Test A F1 F2 F3 F4 F5 F6 Back Reflex Test method is Fixed Figure 18 AT235 Appendix B page 3 Navigating and changing in the Table Use the 4 arrow keys to move the bar in the table You can use change to select another option for a given item but you may also use the dedicated keys as well If for an example you want to change the level you can use the dB keys instead of the Change F1 See Figure 3 Reflex Table Figure 19 Following figure is equal to factory settings for Reflex Test A Reflex Test A Figure 20 AT235 Appendix B page 4 Following figure is equal to factory settings Reflex Test Setur menu for Reflex Test B F1 PS Reflex Test Figure 21 Output Factory See Table 1 Ran
33. aaa 10 Hardware Calibration 2 11 GallDratiorn a macro e de hte dan t 11 Fixed Atten ator Check idi cda 12 Software G libratioh uuu 13 Probe CGalibratioiu PLE 13 Pressure a 14 Probe Tone Calibration tel 15 Compliance eei i 16 Probe Real 17 E 17 Headset Calibration E 19 The information B Tao o 19 Factory Calibration Values un edet aet er ta e 20 Insert Factory Calibration 20 Disassembly SC EC 21 Open dr T ei 21 Pump TUBS CONMECHOMS A i toc Hn 21 Pump Tube Replacement iui thee 22 Electrical Assembling EEN EE EE 23 Rear Panel Connections 4 aia asna aaa ih nahua yala 23 Transducer Wire and Tube Connections 24 Transducer Spare send nen 25 Printer Connections 26 Schematics 27 Analog Block Diagram ee
34. complete measuring chain General purpose frequency counter General purpose digital multimeter General purpose oscilloscope in order to trace and monitor signals Air System The safety valves and the pump system are adjusted in correct way from factory Normally it should not be adjusted but if the pump tube has to be exchanged it is necessary to readjust the spring on the pump Please always use pre cutted pump tubes ordered from Interacoustics Control of the pump system Go to Calibration gt Probe gt Press gt Real menu Place the probe into a cavity airtight connection Press the gt button F2 until you reached 300 daPa in the Pump Ctrl field on the display If the build up pressure keep at 300 daPa the system is airtight If the instrument is out of calibration you can connect an external manometer and a syringe between the air connection on the rear plate and the probe tube Press the syringe until 300 daPa is reached and inspect the manometer If the pressure is stable the system is airtight Safety valve The safety valve must release the pressure then the pressure is out of limit It means if the pressure is larger than 500 daPa 100 daPa or if the pressure is larger then 700 daPa 100 daPa Adjustment of the pump spring Disconnect the probe tube from the air connection on the rear plate Connect a manometer and a syringe between the air connection and the probe tube Go to Calibration gt Pro
35. dB Incr Ch1 Impedance Talk Forward Manual Auto Function Bone dB Decr Ch2 dB Decr Ch2 Auto Bone Right Bone Left Ch2 Off Mic CD 1 and 2 CD 1 CD 2 Monitor Talkback Monitor Talkback FF 1 and 2 FF 1 FF 2 Store No Response Extended Range Print Screen New Subject Error AT235 Appendix A page 15 Analog changes Header Description Format OLANOG _ Input Changed Input US Channel US EOT OLANO1 Intensity Changed Intensity dB US Channel US EOT This is what strings the instrument can send when it sends the OLANO6 Input Changed header 125 250 500 750 1000 1500 2000 3000 4000 6000 8000 WN LP HP SN CD 1 CD 2 Mic 226 678 800 1000 Probe Talk Forward Talk Back Input 30000 Error 30000 Means data This is what strings the instrument can send when it sends the OLANO7 Plus 20 dB Changed header Off Internal External Error Internal means that the plus 20 dB step is switched on and can not be changed by pressing the Extended Range key External means that the plus 20 dB step can be switched on of by pressing the Extended Range key This is what strings the instrument can send when it sends the OLANO8 Interrupter Change
36. designed to transmit data from the audiometer to a computer and to control the audiometer from a computer The Baud rate is 38400 B S and the data format is 8 data bits Even parity and one stop bit Installing the USB Driver on the PC Connect the Instrument the PC with USB cable and turn on the instrument the following window should appear The Driver is available from Windows Update if the PC is connected to the internet or it can be found on the CD with the operation manual Found New Hardware Wizard Welcome to the Found New Hardware Wizard Windows will search for current and updated software by looking on your computer on the hardware installation or on the Windows Update Web site with your permission Read our privacy policy Can Windows connect to Windows Update to search for software O No not this time Click Next to continue Click Next and the following window should appear Found New Hardware Wizard This wizard helps you install software for Dual RS232 If your hardware came with an installation CD or floppy disk insert it now What do you want the wizard to do Click Next to continue Back J Next gt Cancel Insert the CD if the PC is not connected to the internet click Next AT235 Appendix A page 1 Found New Hardware Wizard Please wait while the wizard searches ey Sj e
37. manual for format description The Tymp and the reflexes are transferred in the new format EEPROM Commands Set or get EEPROM data Header Description Format GDE100 EEPROM Data Data1 US Data2 05 Data8192 US GDE101 EEPROM Data from Master SI Address US NumberOfBytes US EOT Address number of Slave Data Address US Data NumberOfBytes US EOT bytes Master SO Address US NumberOfBytes US Data 0 US Data NumberOfBytes US Calculate Checksum When the values in the EEPROM are changes with the two commands above the Instrument has to calculate a new checksum of the values in the EEPROM Header Description Format 500 _ Calculate Checksum Information Header Description Format GDIDOO Identification of communication version data US GDIDO1 GDIDO3 Serial number and date US ddmmyyyy US EOT AT235 Appendix A page 9 5 is possible to remote control the Instrument via the USB connection Header Description Format ___ __ DBUSEOT 101 Set attenuator calibration for channel 1 1 Measured Intensity US Used for auto calibration SPA200 Set attenuator for channel 2 DB US EOT 1 is sound off and 0 is sound on SICPO1__ Deleteallpatientdata SICPO j ResettoPowerupmenu Update display only in Headset calibration ______ To control the keys on the Instrument use the following ta
38. meter 4st the other Attenuator Calibration channel 1 Figure 1 Change to Channel 2 by pressing Swap F6 in order to calibrate channel 2 the AC meter 4st the other Attenuator Calibration channel 2 Figure 2 AT235 Service manual page 11 Fixed Attenuator Check Enter the Fixed Attenuator Check menu from the Calibration menu by pressing F6 Fixed Calibra n Fixed Atte Chi 80 dB 1000 Hz 0 dB IP1 ut 01 hat 1 is OK 2 until all fixed sters are 10 dB 15 dB 20 dB Swar Attenuator Calibration Figure 3 Follow the instructions on the screen AT235 Service manual page 12 Software Calibration A software calibration must always be performed when the instrument has been opened for hardware calibration or EEPROM error has occurred The calibration is a service calibration which means that if the instrument has changed its values during time or because of manual chock corrections for moderate changes in the software can be made by means of the figures in the EEPROM To enter the calibration menus please switch off power hold down shift while pressing Print key turn on power again Hold the keys down until you can enter a password The factory setting of the password is 1 2 3 4 but dealer may have changed it in order to protect the calibration If an EEPROM Error occurs during the power up press shift print to continue to the password screen Setur Probe Headset EEPROM
39. method is sequence and 6 reflexes recorded Stimulus1 US dBHL1 US Pressure1 US Compl11 US Compl12 US US GS Stimulus2 US dBHL2 US Pressure2 US Compl21 US Compl22 US RS Frequency US Pressure US Method US NumberOfPoints US 481 05 05 mi 0 US mS NumberOfPoints US ml NumberOfPoints US GS dB2 US CurveData GS until dB6 if the method is sequence GRCRO00 Contra Reflex Right Ear Old format GRCR01 Contra Reflex Right Ear and 6 reflexes recorded AT235 Appendix A page 6 Decay IPSI Reflex Left Ear Header Description GAILOO Decay IPSI Reflex Left Stimulus US dBHL1 US Pressure1 US Result US Timebase1 Ear Old format US Compl11 US Compl12 US US GS Stimulus2 US dBHL2 US Pressure2 US Result2 US Timebase2 US Compl21 US GAILO1 Decay IPSI Reflex Left Frequency US Pressure US Method US NumberOfPoints US GS Ear dB1 US mS 0 US ml 0 US mS NumberOfPoints US ml NumberOfPoints US GS dB2 US CurveData GS until dB6 if the method is sequence and 6 reflexes recorded Right Ear Description GAIR00 Decay IPSI Reflex Right Stimulus US dBHL1 US Pressure1 US Result US Timebase1 Ear Old format US Compl11 US Compl12 US US GS Stimulus2 US dBHL2 US Pressure2 US Result2 US Timebase2 05 21 US GAIR01 Decay IPSI Reflex Right Frequency US Pressure US Method US NumberOfPoints US GS Ear dB1 US mS 0 US ml 0 US mS NumberOfPoints US ml NumberOfPoints US GS dB2 US lt CurveData gt GS un
40. the pump arm fix with the spring and tighten the spring AT235 Service manual page 22 Electrical Assembling Instrument Flex cable connects 9 15 on mainboard with CO3 CO4 on keyboard rearside Cables are mounted on keyboard before assembly Keyboard PCB 690045xx Mainboard PCB 690108xx CO21 Cable 5 Note Mount flexcables with colour 609 B YEL indication upside ORG RED EH BRN 0 Cable 4 YEL ORG B QE 8585 2 2 to display To Air pipe must be lead underneath RC2 Cable 8 CO14 Cable 9 RC1 Cable 7 Printer unit Rear Panel Rear Panel Connections GRN To print r unit BLU RED BEI WHT Tov Air reservoir RED YEL Probe AT235 Service manual page 23 Transducer Wire Tube Wire Connections 7
41. 0 GND 2K74 10 1 C139 C275 iD R257 X7R 21 6984 Hose IC24 30 ATT3 0 OND 3 XR 1024 31 ATT3 1 B VEE C285 C286 V 3pol 140 AD8672 10 1024 37 2 GND En GND T iae is PNPO AS GND NH 196 GND GND 5V C163 C166 V VDD1 GND 22n 22n GND 10 10 C147 125 R254 0 V V 220n 220n 8145 10K GND 5V 10 10 GND C170 R260 du GND VEEl 8 136 028 IC81A 6 10478 R240 NP R241 NP VDD1 3V3 C38 R253 2K74 10 7 L1 P vDDI C284 NP 1K R259 X7R 280 14 00 Vo 10 0822 1K NP 030 101 X7R V V 21 20 5V GND GND V GND M V Gnyp Gee A COMDATA gt GND GND VEE1 5 D E O5 1053 15 10 2 16 153 7 O6 VDD lt 407 153 33 CLK6 2 dim Np Att Load Shift 1024 27 4 0 A 153 34 amp 1 24 28 B ve LA 9188 Sheet 1 C277 NP B 1024 29 ATT42 i Tile Mainboard 050 051 052 053 1 GND 6 C290 NP 19 NPO 5V NPO 69010807 R244 NP 026 NP 027 2 A GND Input M IXer Interacoustics Drawingno NP Not Present 002000307 050 051 052 AT235 Service manual page 34 lt 001 C94 22n 10 22 10 D 9 2 lt m Vref source MP6 R23 Att Control
42. 00K 196 0 1W 0603 Resistor 2 148 R357 60424901 1K82 196 0 1W 0603 Resistor 2 8356 R370 60402401 18K2 196 0 1W 0603 Resistor 2 R174 R175 60402701 243K 196 0 1W 0603 Resistor 1 R177 60229001 576R 196 0 25W 1206 Resistor 3 R183 R187 R193 60400801 14K3 196 0 1W 0603 Resistor 1 R188 60421601 5K62 196 0 1W 0603 Resistor 1 R200 60402601 10M 196 0 1W 0603 Resistor 4 R205 R206 R209 R210 60425801 3801 196 0 1W 0603 Resistor 3 R214 R284 R303 60400501 1M 196 0 1W 0603 Resistor 2 R258 R260 60421801 2K74 196 0 1W 0603 Resistor 4 R275 R276 R277 R278 60214401 1R 196 0 25W 1206 Resistor 100 300ppm 24 R281 R282 R286 R289 R297 R341 60406101 4708 1 0 1W 0603 Resistor R342 R343 R344 R345 R346 R347 R348 R349 R350 R351 R352 R353 R372 R378 R379 R380 R381 R382 1 R285 60418401 1M8 1 0 1W 0603 Resistor 1 R287 60215901 3M30 1 0 25W 1206 Resistor 1 R291 60421001 7K87 1 0 1W 0603 Resistor 2 R295 R296 60405401 27R 1 0 1W 0603 Resistor 4 RL1 RL10 RL 64500901 AQV252GAZ HE Relay PANASONIC PhotoMOS 3 RL2 RL8 RL9 64501001 AQY212S GU PhotoMOS Relay PANASONIC SOP4 2 512 63600401 125 Subminiature SLO BLO Littelfuse R452 2 13 514 63600801 1A 125V Subminiature SLO BLO Littelfuse R452 2 T1 64600201 MJD122 Darlington NPN Transistor MOTOROLA 252 2 2 T4 64600301 MJD127 DARLINGTON Transistor MOTOROLA PNP 252 3 T5 T6 T7 64600402 BC847B NPN SOT23 Transistor ONsemi 2 V1
43. 03 12 CTSA 1 99 33 BDBUS6_PRG INB VDD 8 ADBUS2 X 1 54 102 48 60 5512 Nos 9 1 99 22 026 15 UART CTS lt lt VDD J covs B FLASH CEfx IC83 26 cie 10 MAX4760 C339 NC3 100 15 IC103D 100 MAX4760 e lt BDBUS6_PRG 1C99 33 1538 Select 10 mm b 14 S gt RTSA 1 104 15 1C103D 13 RTSA GND 74HCT08 1 15 ADBUS3 d BDBUS7 16 1 99 21 9 d 026 17 UART lt IC99 32 4 17 MAX4760 VDD GND 15 1 10 21041 i 15 BDBUS6 PRG 1 99 33 V GND n GND SSCTSA 101046 16 ADBUS4 09971110 lt NC eN 94 100n 44 lt IC104D Blue 1 99 20 10 12 NC 55 GND P374 22K6 MAX4760 XIR NC lt NC 1C99 33 BDBUS6 PRG 2 lt L1 Tooth ann 10 5S FLASH RY BYiix 1 83 15 IC104H 19 UART RSTy 5996 18 2 BDBUS6 PRG 1 99 33 99 13 FLASH RY BY 8358 22 6 ADBUS5 gt gt MAX4780 1C99 19 5 40 15 5 d 0 15 IC104E 27 UART_RxD yy amp gt gt alt 23 ADBUSG 1099 17 R373 226 MAX4760 1297 ONDE ES IC103H 915 1283 PRG 199 33 ei 4 5 9 0 L ace 2 T a ADBUS7 2 2 von 5108 38 92 is i 1 199 16 i fo oe Nh 2 25 27 05 05 Nae aa 38 MAX4760 46 6 6 0 40 d5 VDD 47 18105 gy Oe 106 26 1031 07 Q s 106 97 22 6 oT voz V GND BDBUS6_PRG 5 14 OE 20 sazz H As vos 0 5 Fem
44. 1 75 04 5 SOT23 5 IC Single HST Inverter Fair 1 IC21 62007001 REF02CS SO8 IC Ref Temp Transducer 1 IC24 62010601 MM5451YV PLCC44 IC LED Display Driver Micrel 1 IC26 62001001 AD7249ARZ SOL16 IC D A Converter AD 1 27 62000801 PCM3001E SSOP28 IC CODEC Burr Brown 1 IC36 62006401 AD820AR SO8 IC Op Amp Analog Devices 2 IC37 1051 62000901 74 4040 5016 Binary Ripple counter 235 Service manual 40 PCS Part ref Part No Desciption Description 2 1 41 62007901 AD7896AR 508 Converter 1 1042 62009801 ADSP 2186KST 133 IC DSP Microcomputers QFP100 AD 1 IC47 62018001 AD822AR 508 IC RailToRail FET Op Amp Dual 1 48 62011401 XC9572 15PQ100C Programmable CPLD QFP100 Xilinx 1 1 49 62001401 TL7705ACD1 A 508 Suplly Voltage Supervisor 1 IC50 63201701 14 7456MHz SG 615P Crystal Oscillator 5V 14 0x9 8mm EPSON 3 IC53 55 IC60 62010101 Z84C2008VEG PLCC44 IC Z80 PIO Zilog 1 IC54 62010201 MC68306AG16B IC CPU Motorola TQFP144 2 IC57 IC65 62002401 LM6142BIM SO8 IC Dual OP Amp National IC58 62008701 AD8402AR100 SO14 IC Digital Potentiometers AD 1 IC62 62011001 YGV610B 100 IC CPD Controller Yamaha 1 IC64 62001701 74HC138D 5016 IC Line Decoder Demultiplexer 2 IC66 IC72 62008901 K4F151611D JC60 SOJ 1Mx16Bit DRA
45. 1 How to calibrate 1 Select by means of frequency increase decrease the frequency to be calibrated or start to calibrate the pre selected frequency 2 Press intensity increase decrease for channel 1 until the desired sound pressure level has been achieved 3 Press store The instrument will automatically jump to the next frequency 4 Continue to calibrate the new frequency or select another To Test the Ipsi Calibration When done with the ipsi calibration you can enter the Real Mode to test the calibration Select Real F6 to enter this menu AT235 Service manual page 18 Headset Calibration Calibration Headset Calibration C 3 50 48 125 Hz 0 0 dB TDI GHT 4 8 WN LP HP TDH39 CIR 22 EAR 3A Real F3 F4 F5 Headset calibration Figure 12 This is the headset calibration menu In the audiogram in the screen picture you can see the calibration of the transducer and the calibration level by looking at lines The dotted lines are the calibration values drawn with offset in the calibration level normal line Above the audiogram we have an information window The information window The information window contains information that can be helpful working with the calibration The figure below shows what kind of information that is displayed Patient Response Current Frequency LISSE 80 dB 500 Hz 13 0 dB Tone Switch Current Level Calibration Value Frequency Maximum Level Information Window F
46. 1 Sheeti 1053 14 MBE 11 1 54 86 1053 37 CS POT Sheet 1 153 10 CLK322 12 Ack 10 ND 155 4 75 4 13 1C54 84 d Extern Printer Busy 11 VDD lt 1 VDD lt Sheet 1 25714 12 lt 53 15 15 1654 83 Select 18 1055 32 SHIFT 16 25 VDD ISO VDD gt VDD Sheet 1 Vref lt 17 vob lt LED ADJ Sheet 3 IC30 CTRL 18 19 1 54 76 20 22 22 AD8402 100 GND 23 24 24pol 26pol Intern Printer CO15 1 1 64 10 Sheet CSCDIS gt z VDD 3 4 NL OR KM 6 i 7 Test point CO20 1 TSW Remote 10 CO 02 1 5 11 C020 3 PATRESP 12 16 15 VEE ADJx 00204 Ge i 028 15 18 Pia 0028 16 GND G amp TP19 COLO 17 E 2 Cole 19 C072 4 20 0073 22 COL4 21 Ch o VDDIp lt TP23 Sheet 1 COL5 22 aracter L Display 07 5 CO75 TP24 COL6 23 CO7 6 div ps COL7 24 I TPS 24pol Dee ee ee VDDip TP100 D46 C194 Local Power Supply 5V TP102 Local Power Supply 5 gt GNDp 78L05 MBRD835L C353 gt 220n C204 VDD VDD 10 R162 2700u 12V_PS 20 X7R 15 4 20 CO13 112 CO12 C183 10 GNDp NDS C174 D34 NP 2096 GNDp GNDp gt 200 SMBJ5 0A Ded 20 192 __ 179 C349 100n 100
47. 233 1043 Lit BLM18PG121SN1D ae Lii oA C027 dus GND Att Load Shift IC33 IC46 012 m A 1 7TDI 4 GND VDD L NP 12 er 346 012 Las 4 2 107 4 GND IC52D lt DSP1IACK 1 42 58 Di4 3 mE 8 GND C154 o 74 08 CS 1C58 7 44 0 4 910 4 015 44 di5 y 4 GND 2 CSPOT2 1085 23 dr 0 4 lt lt A 5 gt GND GND 77 7 22n VDD IC70 6 gt GND 1 VDD 1072 Sheet 1 8 PDO NP GND GND dB1A GND 1 75 CASO pat 90 PD1 XC9572PQ V 22n PD cO14 GND a VDD VDD NC7ST04 4 4 505 Rcs da 88 PD5 161 Ci71 C184 UDD PAG PUR 22n 22 22 D 1 V BAT Power Suppl GND 2 pply X1 CLK Fog S 5 8 GND GND GND VDD 5V 25V 4 x2 PB2 IACKS 80 IC52A GND Vref 5 0V 104 28 RxD0 RxDA PB3 IACKG 74HCT08 VDD1 11V Vref pmp 50V IC104F 26 TxD0 TxDA PB4 IRQ2 Z VDD 04 28 RTSO 16 RTSA OPO 5 22 5 2 17V to 22V 1 1046 20 50 X CTSA IPO PB6 IRQ5 77e ces RxDB PB7 IRQ6 C64 22n E TxDB a goz Sheet 3 RTSB OP1 TCK 4 a4 2 GND 7 Date Constr Appr T j 8312 4 CTSB IP1 5 300501 2 IP2 16 Keyboard 2 gt TMS 2 8 Revision
48. 35 is doing its normal measurements it is running in automated mode where everything is preset That why the menu is called Auto impedance There are three screens in this mode One where all information are put together and Reflex mixed one full screen with tymp extended tymp and screen with reflex extended reflex When an automated session takes place the instrument switches to a menu without any graphically interface called Do Test This is the control centre of the instrument where the list of tasks to perform are placed and executed Further more there are a Do Tymp menu and a Do Reflex menu also without graphically interface that deals with the measuring of data That s why the menu item changes during a measurement Menu s like EFT and Manual Reflex measurement uses the Do menu and the Do Reflex menu without the Do Test menu The inside both hardware and software of the instrument is designed with two sound channels This is necessary when we need to produce both a probe tone and stimuli at the same time The CPU is in control of a DSP with a two channel Codex When monitoring the state of the instrument you therefore needed to show the state of two channels The probe tone is always controlled from channel 2 Headers from the Instrument when things change Header Description Format OLMUO2 Menu Changed 05 OLMUOS Submenu Changed Submenu US EOT OLKY
49. 80 R32 13 8 7 C34 10 1 Fee VDD1 VDD1 GND 15dB IC34 55 2404 Sheet 4 5 C46 57 2048 22 22 R28 1K e 10 10 CH T Sheet 4 22 C71 1027 12 VDD1 10 GND VEE1 407 in A 7 10 OUT 2 IC17A R47 196 A 5 GND ttenuator 8335 R336 8 tu R64 NP NP Sheet 6 R67 AD8672 21 82 5 8 C47 22p 596 C361 NP 10 105 13 10 R54 AD8672 1 5 NP0 X5R gt gt ATTOUT2 4K99 1n AD8672 10 10K VEE1 VDD1 196 X7R R43 10K AD8671 V NPO VDD1 GND T C365 V VDD1 GND V GND 1 V d d VDD1 GND GND 22 22 ces 59 GND 1 20 A c35 cae 10 10 22 22n C363 VEE1 22n 22n 10 10 R51 VDD1 NP 10 10 GND VEEl 3K92 A R337 R338 VEE1 V NP NP IC112 GND GND VEE GND 6 8175 IC11 C52 V 243K 6 NP 22n VEE1 R339 C362 10 V AD8671 NP C364 R340 GND V 1096 NP NP GND XR y GND V V VEE1 GND VEE1 GND NP Not Present Title Mainboard 050 051 052 053 Interacoustics 90 10807 Drawingno D02000307 050 051 052 AT235 Service manual page 35 ATTOUT 1 gt 2 6 Sheet 5 ATTOUT 25 10 6 Sheet 5
50. 888 8 FF1 on off 40 T N ec ee 022 1 on off 3 20dB CH2 016 023 INSMASK on off 8 Sune 015 IC32 9 2 lt OUT25 OUTIS 91 J 024 329 i T FFT on off 013 T HN 025 I CH2 35 BONE on off 012 0 2 8 L INSMASK on off __011 026 Sw2 UT OU 9 PROBE on off 010 027 SW4 8 0 PHONE on off _ 09 32 00729 00110 5006 GAT 1032 11 ATT3 0 OUT31 NC 1 38 9 4 2 OUT32 38 10 ATT4 1 OUT33 0 07 1238 11 4 0 OUT34 OUTO6 00735 5 1 53 15 COMDATA OUT04 1C53 11 CLK2 241 CLK vss OUTO1 y 5451V GND V tr 02 Analog Control V VOD 2 o 0 27 o 0 27 RL1 Fi V_rel 2SJ317 VEE2 17V to 22V Vref1 2 5V Vref_pmp 5 0V vrag 4701 6 L PHONE on off H 3 4 AGV252G RL2 v ra qP 470 PROBE on off 2 PROBE RL23 2125 RC2 12 Sheet 3 R343 470 RL3 6 rel R380 R381 R382 470 470 470 470 012 1 on off 2 AQV252G GND RL4 req 44 470 L FF1 on off 2 NP RL5 148345 4701 6
51. 9 VOUTB Goda 2 1 53 36 DSP1 IACK lt lt gt SCLK1 1652 5 Sheet 3 AD7249 URS 1 100 4 RESET gt CLR ER 52 4 GND LDAC ROFSB gt 2 GND IC23 CO1 Tape CD1 A 5V 5V i IC28B Input Amplifiers Buffers 4 P lt 1 6012 128 HE 0 C176 177 C112 56131 2 V 6 ehe b 10 NP 100n7T 10u DEN AAND E GND NP R71 20K 2 R119 NP 7 lt 10 20 WEE NP Probe Mic CH1 LPF gt 45V C159 C175 GND GND Tape CD1 GND EGEN NP R93 C93 R76 VDD1 ND 107 pgi NP PROBE MIC 5 gt 5 X X RC2 11 220n 47 5 1225 Ci42 148 pev VER Attenuator Control DAC VDD1 GND NP NP Sheet 3 1096 08671 SOND R224 10K 1 10 1 10 10 R123 GND 114 C109 1 GND X7R V X7R NP 8141 NP i NP NP Tape CD2 GND VEE1 42 157 122 c92 c96 V NP 0 8126 p 22n 22n 1034 C53 33 CLK6 a N GND 10 10 a orc e n 165334 023 3 3 D22 3V3 118 C126 CO6 GND lt 7 646 CO6 1 V Monitor 1 C062 GND GND 5V GND R147 3 NP NP 024 10 1 _10 7 Tape CD2 GND woe me mm R103 E ms gt VDD1 pp L I 7 GND VEE1 od C122 2K49 TB Mic2 R116 C132 x 109 470 014 T 47u 6V2 0 71 20 6 2 2
52. Att Fi The Calibration Menu Figure 4 Notice For calibration of the Universal Transducer for both types of probetips you must carry out the probe calibration twice Repeat pages 17 21 after switching probe tip Probe Calibration To enter this menu from the Calibration Menu Press Probe F2 Probe Calibration Menu Figure 5 AT235 Service manual page 13 Pressure Calibration Calibration Pressure Calibration Calibration Line Fale 4 F5 F6 Pressure Calibration Figure 6 Looking at the picture you will see two lines if the instrument is calibrated in a diagram The dotted line is the calibration line that graphically gives you information regarding the calibration of the pressure The normal line is an average line and by comparing the two lines you can get quick overview of the pressure calibration You can also read the actual ADC values under Points if necessary To Calibrate Pressure System Press Calib F1 and follow the instructions on the screen To Test the Probe Calibration If the probe is calibrated you can test the calibration among other things in the Probe Real Mode Select Real F6 to enter this menu AT235 Service manual page 14 Probe Tone Calibration 85 dB 226 Hz 10 7 dB 0 Adjust resolution Roush Probe Tone Calibration Figure 7 This is the menu for calibration of the different probe tones The dotted line in the bar shows the adju
53. BCBUS1_ALE LE GND 07 as 1 09 sa thi lt 29 1 99 29 Hao vor toon 14 NC i NO 32 74HC373 10 9 R357 10 12 amp Nc 35 GND Ai 912 39 S12 1 104 25 UART uns 55 1098 41 _ 413 74HCTO8 MAX4760 do a8 A13 013 43 _ 414 1K82 GND di 4100 00 a9 14 45 015 Di Qt 212 1 15 1015 1 D 803 3 9 A A17 FLASH RY BYiix 1 1040 10 GND gq BS58 221 GND VDD d4 13 12 12 6 04 Q4 18 RY BY R283 10K C340 d5 4 a13 9 Un 05 05 NC gt 100 96 D 6 14 10 NC 43 10 97 19 5 VDD 1 99 29 1 99 33 104860 FLASH gt gt 26 Nc 4 Too BCBUS1_ALE gt BDBUSe PRG gt 1 20 D VDD M VDD L34 L33 panies 78208 LE GND 100 IBUABM ONE M yeg C304 D BLM18PG121SN1D BLM18PG121SN1D C331 100 cag ae 74HC373 10 IC104B 3 FLASH WER WE 100n IC114D 1 pos 10 i GND 10 74HCT08 1219 100 99 33 BDBUS6_PRG BYTE GND C334 C335 _ 0336 GND GND C15 NP N1 0495 RESET GND 4 GND 1 20 AM29F800B GND GND 19214 100 105 5 5 GND 1000 lt lt 6269 Na S 99 lt 8 ADBUSO 2 ADBUSO 1 103 36 cvdd 0 7 gt ah 9 9558 ADBUSI ADBUS IC108B 2 8 x BLMISPGI2ISNID 271 100 R303 GND OO ADB
54. C FPC Conn Right angle 1 0mm Top SMT PCB Cont 3 20 21 25 65006001 4Pol Picoflex SMT Conn 1 27 REEL CAP PCB MOLEX 1 26 65000101 20Pol SEI Connector Conn SMD 1mm SAMTEC onTape 4 014 015 018 031 61700501 6 2V 0 5W Zener diode Philips 3 D21 D32 D33 61700301 5123 30V 2 0A DO214AA Schottky diode Vishay 6 D22 D23 D24 D25 D28 D29 61700601 3 3V 0 5W Minimelf Zener diode Vishay 1 D34 61705501 SMBJ5 0A 5V DO214AA TransZorb diode 600W Vishay 1 D43 61704301 BAS40 05 40V 120mA Schottky diode SOT23 Catode Catode 1 D46 61711501 MBRD835LG 35V 8A Schottky diode Motorola TO252AA 1 F1 64602901 2SJ317 MOSFET P Ch Transistor 12V 0 4R SOT89 RENESAS 2 F4 64601001 ZXM64P035G MOSFET Transistor 40V 0 0608 SOT223 ZETEX 1 64608501 IRFR9024N Transistor 55 0 175 Ch TO252 IRF 8 IC2 IC6 IC10 IC11 IC12 1225 IC29 62034901 AD8671ARMZ REEL IC Op Amp Analog MSOP8 Devices 2 103 104 62047001 MAX4760ETX QFN36 Quad DPDT Switches 3 IC113 IC114 IC52 62049801 74 TSSOP14 IC AND Gate PHILIPS 9 IC16 IC17 20 IC22 IC23 IC31 62035001 AD8672ARMZ REEL IC Op Amp Dual Analog IC8 IC9 MSOP8 Devices 3 IC3 IC13 IC14 62001201 SSM2404S 5020 IC Audio Switch AD 2 IC4 IC15 62001101 THAT2181SB 508 reel IC Voltage Controlled Amp 1 IC5 62002101 55 24025 50116 IC Audio Switch AD 6 IC18 IC19 IC93 IC95 IC96 IC110 6200460
55. C105 C137 C151 C227 C230 61400501 22p 5 50V 0603 Capacitor ceramic NP0 C37 C71 C318 C319 61413001 4u7 10 16V 1206 Capacitor ceramic X5R C77 C83 61401501 470p 5 50V 0603 Capacitor ceramic C0G C78 C79 C87 C95 C97 C98 C100 C103 C111 C180 C183 C293 C336 C367 61003301 10u 20 16V 3 5 5 Capacitor lyt Standard 105 C C122 C132 C173 C235 C301 61004101 47u 20 16V 06 3 5 2 Capacitor lyt Low 152 61004301 1000 20 10V 10 0x10 0 Capacitor lyt Standard 85 C C174 61004001 2200u 20 6 3V 012 5 13 5 Capacitor lyt Low Impedance C179 C308 C349 C350 61003101 100 20 35V 6 3 8 Capacitor lyt Standard 85 C C185 C196 61003201 220 20 16V 10 10 Capacitor lyt Standard 105 C AT235 Service manual page 39 PCS Part ref Part No Desciption Description 2 2 C234 C237 61202001 4u7 20 25V Package Capacitor tantal 2 C265 C354 61004201 1000u 20 16V Capacitor lyt Low 12 5 13 5 Impedance 2 C325 C326 61407901 47 5 50V 0603 Capacitor ceramic NPO 3 C329 C332 C351 61415201 47n 10 16V 0603 Capacitor ceramic X7R 2 C333 C352 61415001 4n7 5 10 50V 0603 Capacitor ceramic X7R 2 9 15 65002901 24Pol FFC FPC Conn Right angle 0 5mm Bottom SMT PCB Cont 1 CO16 65000501 12Pol FF
56. M 60nS 42P 5V Sam 3 IC67 100 107 62004801 NC7SZ08M5 SOT23 5 IC Single UHS AND Gate 1 IC71 62007201 MAX749CSA 08 IC LCD Bias Supply MAXIM 1 IC76 62011801 HN58V65AFP 10 FD28D EEPROM 1 IC77 62035801 A3977SLP T TSSOP28 IC Microstepping Driver 1 IC83 62048201 AM29F800BT 55ED IC 5Volt Flash Memory TSOP48 AMD 1 85 62045201 5401 25 TSSOP24 IC 4 x Dig Program Pot meter 3 IC88 IC89 IC90 62045301 NC7SZ86P5X SC70 5 IC Sing UHS Exclusive OR Gate 2 IC97 IC98 62014201 74HC373D 5020 IC Transparent Latch PHILIPS 1 IC99 62046901 FT2232D LQFP48 IC Dual USB UART FIFI 1 102 62030101 AT93C46 10TU 2 7 2 7V 5 5V TSSOP8 ATMEL 2 106 108 62004701 NC7SZ32M5 SOT23 3 Single 5 OR Gate 22 LIL8L4L5L6L7L8L9L11L13L14 63704601 BLM18PG121SN1D 1208 Inductor 2A 0 058 L16 L17 L18 119 120 121 122123125 25 0603 133 134 1 124 63800701 NFW31SP506X1E4L Filter Chip 50 2 200 25 1 126 63701001 CD54 330LC 33uH 15 Coil 880mA 0 238 5 8x5 2 1 L27 63700901 CD54 221KC 220 10 Coil 350mA 1 57R 5 8 5 2 235 Service manual 41 PCS Part ref Part Desciption Description 2 1 L28 63705801 IDC 5020 100uH 20 Inductor 0 28R 1 3A 12 95x9 4mm VISHAY 1 L29 60429301 43K2 1 0 1W 0603 Resi
57. Not Present Interacoustics A S Date Constr Approved Construction 160201 PSC HBJ Keyboard Partno 69008902 Drawingno D02006602 050 AT235 Service manual Page 28 Sheet 1 of 1 Components Index and Values Notice CO1 and CO2 are sited on the rear side of the PCB S7 High Probe Tone switch is only present on the AT232h Go AT rra 235 29 Keyboard List PCB 69008902 Assembled Board PCA 51003302 Quantity Part Reference Part Value Toleranc Number e 6 C1 C2 4 C7 C11 C16 61410001 10n 1096 1 C17 61419601 1n5 1096 1 C3 61002701 6u8 20 1 5 61400801 10 2 9 C6 C10 C12 C13 C14 C15 C18 C19 C20 61408701 220n 1096 2 C8C9 61400401 22p 596 2 CO4 65002901 11 01 D2 D3 D4 05 06 D7 08 09 D11 014 71700101 LED 3 D10 D12 D13 61700201 LL4148 1 IC1 62010601 5451V 1 2 62000301 4070 1 IC3 62002301 MC14490 1 R1 60211601 2K 1 4 R2 7 R8 60210001 10K 1 2 R4R5 60205101 10M 1 3 R10 R11 60222901 47K5 196 1 R9 70100101 22K 596 Sw 12 5152 3 54 59 10 11 13 515 17 19 522 36302001 7 51 5359 10 515 17 519 36307101 1 1 S11 36307501 tast 1 1 S13 36307401 tast 1 1 52 36309201 tast 0 4 20 21 35400101 nut 8 20 21 35500201 pertinaxskive 3 20 21 24 51000301 4 1 522 36309301 tast 0 1 4 36307201 tast_2 7 55 56 58 512 514 516
58. OO pressed Key US Status US EOT This is what strings the instrument can send when it sends the OLMUO2 Menu Changed header Main Setup Common Setup Subject Calibration Tymp Setup Password Reflex Setup Headset Real Fixed Attenuator Advanced Setup EEPROM Setup Advanced Imp Setup Advanced Aud Setup Attenuator Calibration Headset Calibration Probe Calibration Pressure Calibration Compliance Calibration Probe Tone Calibration Probe Real Clinic Modify Tone Auto Impedance HW Family HW Test Manual Impedance ETF1 Ipsi Calibration ETF3 Headset Options ETF2 Manual Audiometry Setup Audiometry Setup Test Audiometry Setup Impeadence Setup ABLB Stenger Function SISI Talkforward Reset Speech Speech Setup Attenuator Setup Cochlear Implant Speech USA Do Reflex Do Do Test Error This is what strings the instrument can send when it sends the OLMU03 Sub Menu Changed header Extended Tymp Extended Reflex Reflex and Tymp Mixed This is what strings the instrument can send when it sends the OLKYOO Key pressed header Pause Reflex Ipsi Contra Audiometry Manual Print Store Right Left F1 F2 F4 F5 Back High Tymp Hz Hz Incr Decr Ch1
59. R22 dB 20 15 Coupler types used by calibration 9 is calibrated using a 6cc acoustic coupler made in accordance to IEC 303 Ipsilateral earphone and probe tone are calibrated using a 2cc acoustic coupler made in accordance to IEC 126 Output voltages regulated Pin no Voltage Cont current A Peak current A 1 Gnd 2 2 3 5 0 5 1 0 4 12 0 7 3 0 5 12 0 5 1 5 2 4 5 1 3 View on output pins AT235 Service manual page 7 General about specifications Interacoustics continuously strive to improve the products and their performance Therefore the specifications can be subject to change without notice The performance and specifications of the instrument can only be guarantied if it is subject to a technical maintenance at least once a year This should be made by a workshop authorised by Interacoustics Questions about representatives and products may be sent to Interacoustics A S Phone 45 63713555 Drejervaenget 8 Fax 45 63713522 DK 5610 Assens email info interacoustics com Denmark http www interacoustics com AT235 Service manual page 8 Calibration Procedure General Information Service Adjustment and Repair This instrument can be serviced adjusted and repaired without losing the validity of the CE marking provided the measuring equipment used is fulfilling the demands below the adjustment procedure are followed and the personnel is having
60. RT2 Tn NPO 100n 8275 R276 100 8278 10 SCK2 sck1 9 asp 0 GND 10 _ 1 1 10 1 R200 X9 xel M 8 vss VDD1pmp X7R X7R 10M X20 Ido 124 NFW31SP wee GND 24 576MHz L77 dU CO18 128 100uH SHORT3 200 26 181 GND R208 m 59 m Sor C230 22 1 Lp 75 198 0 192 95 5 NPO cono 74 198 GND 193 i __ 2 LD3 3 TP9 256 _ c265 C354 0 GND_pmp TAEA 2 22n 1000 1000 GND GND GND IRQARQ 5 20 20 CON3 WDACK WDACK LD5 22 1 SHORT1 CSY RDRO RBRO LD6 70 VDD R204 D44 T2pol MORTOS qs p BLM18PG121SN1D 0 28 122 Display Ere GND emp 2 GEE ESE 9099 d x E E E GNDp 1 6666 He 423 00 C246 C253 C255 C228 229 C209 EN 100n 100 2n sen 22 V GND GND GND 15 Sub D 2 VDD1 GND l i 15 pin Sub D est point DIP16 R82 128 2 1 8102 10k ca C145 8 1 e TP26 i es al R237 10K CO19 1 OUTIB 1 12 gt RC2 13 GND VDD1 CO19 2 OUTIA 0 15 RL gt GND 1 CO193 OUT2B 9 5 12 3 m VEE1 q ODA oora 29 6 11 X PROBE 1225 Sheet 4 4 2 See TP30 10 552 29 SOPIS RC246 PRESS1 Tap
61. Reflex Reflex Decay EN 60601 1 Class I Type B EN 60601 1 2 EN 61027 ANSI S3 39 Type 2 EN 60645 1 ANSI S3 6 Type 4 Tone audiometer 15 W 60W See separate service manual T1 A Voltage 15 35 30 90 Temperatures below 0 above 50 cause permanent damage instrument its accessories 10 minutes at room temperature 20 C 226 Hz 85 dB SPL with AGC assuring constant level at different volume Automatic Measured value is displayed on the graphical display 600 to 300 daPa 800 daPa and 600 daPa Minimum 50 daPa s medium maximum or automatic with minimum speed at compliance peak Selectable in the set up 0 1 to 6 0 ml Ear volume 0 1 to 8 0 ml Automatic where the start and stop pressure can be user programmed in the set up function Williams test automatic function Compliance is indicated as ml and pressure as daPa Stimulus level is indicated as dB Hearing Level 1 curve per ear 3 curves per ear 250 500 1000 2000 3000 4000 6000 8000 Hz 125 250 500 750 1000 1500 2000 3000 4000 6000 8000 HZ 500 1000 2000 3000 4000 Hz Wide Band High Pass Low Pass Wide Band High Pass Low Pass Connection for patient response switch Can be selected to be either standard earphones or insert phones by pressing shift Right Left TDH39 earphone for Reflex or Audiometry measurements Probe earphone incorporated in the pr
62. Restore Factors Calib Total F5 F6 Back Fi F2 F3 00000 Menu Figure 40 235 provides tool for administrating the information stored the setups store restore the setup and initiate to factory settings either from this EEROM menu or restore setup data trough a key press during power up When the setup of the instrument is done you can enter this menu and store all settings as an original setup If a user changes in some setup items and cannot get the instrument to work properly afterwards ask the person to switch off power hold down lt shift gt lt F4 gt switch power on again and press Yes F1 when the instrument asks you to restore setup to original setup By doing so you bring the setup back to the settings you stored before you send it to the user You can also guide the user in to this EEPROM menu but that requires you to tell the user the password Factory setting is our way of doing the setup AT235 Appendix C page 8 Appendix U Update News Following Improvements are made for instruments from no 750659 New Main board complete assembled board PCA version 51007410 PCB 69010807 Compatible to previous version Optimisation of the pump driver IC77 Following Improvements are made for instruments from no 737336 New Main board complete assembled board PCA version 51007409 Compatible to previous version Resistor R367 is modified to improve tolerance for flash prog
63. S SO SOH CHKS00 US EOT Slave Nothing 3 Setting a key or menu in the Instrument Master STX 00 US 00 US SO SOH SPKY00 US 12001 US EOT Slave Nothing 4 Getting all relevant subject data from the Instrument Master STX 00 US 00 US SOH SGGA00 05 Slave STX 00 05 00 US SOH BLST00 US STX 00 US 00 US SOH SGGAO0 US data EOT STX 00 US 00 US SOH BLEN00 US EOT Ex 5 Getting data left phone from the Instrument Master STX 00 US 00 US SI SOH GTLP00 US EOT Slave STX 00 US 00 US SOH GTLP00 US data Online Communication Valid from software version AT235h 1 10108 and AT235 1 11108 Ask for EEPROM data Send EEPROM data Send EEPROM data Calculate new checksum Select Setup menu Ask for all data Send all stored subject data between a Block Start and Block End Ask for data Send left phone data The AT235 is capable to send information to the PC whenever things change in the instrument and when data is obtained from the probe The online communication is enabled from the PC because it only is used together with a PC The Online Communication is not completely implemented yet so subject to change Header Description OLENOO Enable online communication OLDIOO Disable online communication AT235 Appendix A page 14 How the instrument works When the AT2
64. Serv ce Manual Impedance Audiometer AT235 Part number 80650106 Valid from instrument no 750659 Contents ce PEEL 1 General Technical Specifications 2 aa SS Sa Sa s ss 3 Impedance Measuring System 3 Reflex and Audiometer Functions 3 Table 1 Frequencies and intensity 4 Specification of input output connections n aaa 5 Calibration properties u L u 6 Coupler types used by calibration n nunus 7 Output voltages regulated en 7 General about 8 Calibration Procedure i M 9 General ee aed aah nL fe de RU a Rie 9 Service Adjustment and Repailr L 9 Error in stored data EEPROM Error 9 Equipment for the L 10 a a
65. T Note When a Master is using a SO direction the slave will send back nothing When the master uses CRC check the slave respond with OK or ERR Each time data is transmitted a US control code is added Ex 10 US 125 US With this construction it is always possible to see when all bytes in a single data transmission is completed CRC Check The Instrument supports CRC Check on the bytes received from the PC If the data packet contains a CRC value the Instrument calculates the CRC value of the bytes received and responds with OK or ERR If the Instrument responds with ERR send the data packet again The CRC value is calculated from the STX to and including the EOT the CRC value is added between the last US and EOT and must always be 5 digits Header and Data Formats A header consists of a control code SOH and 6 bytes header Each header tells witch kind of data that follows and how the data format is The following table describes the different types of headers and their data format Block Start Header and Block End Header If the Master wants to send a sequence of headers and do not want the Slave to respond on the EOT s the headers is send with a Block Start in the beginning and a Block End at the end The slave waits for the Block End before it processes the data Similar when the Slave sends back data to the Master it can pack the data headers in between a Block Start and a Block End to indicate when all the requested d
66. US2 ADBUS2 IC103C 8 RAE C329 gt gt ADBUSS ADBUS3 1 1030 10 CO25 GnD lt a 3V3OUT ADBUS4 ADBUS4 IC103E 28 L29 43K2 1053 9 ADBUS5 ADBUS5 IC103F 26 gt gt USB 5V ADBUS6 ADBUS6 IC103G 20 F4 55 USBDM ADBUS7 ADBUS7 IC103H 18 ZXM64P035G USBDP ACBUSO gt FLASH_RY BY 1 1040 9 PAD VDD 4pol NP NP ACBUST R315 10K C233 239 240 C241 C242 C243 C244 C245 C201 C203 C205 C207 C202 C197 190 191 9 ACBUS2 T 5 5 R294 1K5 T 45 21 29 1 23 1u NPO NPO STOU CBUS3 s 100n 100 ioon 100 100 100 100n 100 100 100 100 100 100 10 SIWUA 20 X7R IC49 5 4 RESET V V V V GND 5 PDBUS0 GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND BDBUS1 NP0 R287 Power Supply GND SIN peers 68306 1054 Sheet 1 GND 3M3 1 SMe XTOUT BDBUS4 BDBUS6_PRG 107 VDD 57 BDBUS5 BDBUS6 2 BDBUS6_PRG BDBUSe PRG 8399 J 10K VDI atv BDBUS7 BDBUS7 dsp vdd 1 6 gt 6 x BLM18PG121SN1D VEE2 17V to 22V 19 Vref1 2 5 BCBUS0 BCBUS0_CS BCBUS1 BCBUS1_ALE BCBUS1_ALE 8308 10K VDD Vref 5 0 BCBUS2 BCBUS2 RD BCBUS2_RD Fa 155 VDD Vref 5 0 BCBUS3 BCBUS3_WR BCBUS3_WR VDD x UV tes SI WUB R302 10K dsp vddt 18 36 67 90 PWREN C210 C215 217 C218 220 224 C120 116 128 C121 155
67. V2 64300301 MC78LO5ACD 5 508 Voltage regulator ON Semi 1 V3 64300101 MC79LOBACD 5V SO8 Voltage reg 100mA TEXAS 1 V5 64308601 LT1370IR R Package 7Pin Switching Regulator DD Pak LINEAR 1 V6 64301001 LD1117S33TR 3 3V Low drop Voltage reg SOT223 STM 1 1 63201401 12 288 2 NX1255GB Crystal 11 8x5 5mm 1 2 63201501 16 670 2 NX1255GB Crystal 11 8x5 5mm 1 63200701 24 576 2 NX1255GB Crystal 11 8 5 5 1 63202701 6 000 2 HC49 4H SMX Crystal 11 4 4 9 2 189 204 71004301 2700 25V 18 25 7 5 Capacitor lyt radial 235 Service manual 43 PCS Part ref Part No Desciption Description 2 2 2 75804001 Straight with lock 1 CO7 75808301 6Pol AMP Male PCB Conn Straight with lock TYCO 1 CO13 75805001 4Pol Conn Male PCB Conn Straight 3 96mm W Lock 1 14 75806001 26Pol Pin Header Conn Straight Dual row W House PCB 1 CO19 75808101 4Pol AMP Male PCB Conn Straight with lock TYCO 2 R12 R52 70121901 Temperature sensor Resistor Class C PT1000 2 RC1 RC2 75801301 16Pol IC Socket PCB Conn 0 3 Preci Dip AT235 Service manual page 44 Transducer Board Diagram 002006401 R21 2K49
68. and the Slave are using the following format Data packet from a Master device Data packet from a Slave device Recipient and sender are revered for later use and can be ignored Both the Recipient and the Sender are consisting of two bytes each A data packet form a Master will always contain a Direction This direction tells the slave if it has to store or to send out the kind of data the header describes The header is an indicator for the type of data and how the are transmitted AT235 Appendix A page 3 Control Codes All information s in the transmission between a Master and a Slave are controlled by control codes see table 1 Code Hex Description Code Hex Description Start of TeXt Group Separator EOT End Of Transmission Record Separator SOH Start Of Header Shift In US Shift Out OK CRC Ok CRC Error Control Codes Table 1 A data packet from a Master will look like this with all its control codes STX Recipient US Sender US Direction SOH Header US Data US EOT Or with CRC check STX Recipi Sen Directi Head Data CRC Value EOT ent der on er 5 digits Direction can either be SO or 1 If It is a SO shift out direction the Master wants to send data into the slave and if itis a SI shift in direction the Master wants to receive data A data packet from a Slave will look like this with all its control codes STX Recipient US Sender US SOH Header US Data EO
69. as for the AGC Probe tone control The function will avoid too high levels in ear with smaller ear volumes If the ear volume is higher than or equal to 2 ml the AGC Stimuli system will do nothing Advanced Audiometry User Setup Calibration Advanced Audiometry Menu Not Heard Lines Manual Audi try Rudiometer Freauencies 125 Hz On Bottom Toneswitch Man Intensity Sterdown Off Automatic Rudiometrs HW Freauencies 125 Hz Off Conditions 2 out of 3 F1 Advanced Audiometry User Setup Figure 39 Audiometry Headset Factory TDH39 Range 9 or EAR Description Selects what headset to be used in audiometry menus Note that by choosing another transducer you may need to calibrate the transducer The AT235 can hold calibration values for both transducers Default intensity Factory 30 dB Range Off 10 to 50 dB in 5 dB steps Description If Off is selected the instrument will behave as follows In manual audiometry the intensity it will hold its level when shifting transducer and will initially go to 30 when selecting the manual audiometry AT235 Appendix C page 5 In the HW test the intensity will always to 40 dB no matter what the previous intensity was If a value is selected the instrument will behave as follows Entering on of the two menus or changing transducer the intensity will go to the selected level Not Heard Lines Factory On Range
70. assword for entering the Calibration menu Select the EEPROM menu F4 Press F6 for doing a totally data recovery By doing so the program inserts factory data all over the EEPROM Turn off on power and see if the error box comes again If so replace the EEPROM IC on the main board HN58C65 Recalibrate the instrument under all circumstances Note This error is probably an indication of unstable EEPROM so even though the system should work after at total recovery it is recommended to change the IC AT235 Service manual page 9 Equipment for the Calibration In order to assure correct calibration of the audiometric equipment it is important that the necessary measuring equipment is used and that it is reliable and stable Minimum requirements for measuring equipment Measuring amplifier with input for condenser microphone or a sound level meter fulfilling the demands of 651 Type 1 Acoustics coupler 6cc and 2cc fulfilling the demand of IEC 303 and IEC 126 1 pressure field condenser microphone for the above mentioned couplers fulfilling the demands of the IEC 1094 1 with range from at least 300 to 600 daPa and accuracy of 5 of reading 5 which ever is the greatest Including manual pump CAT40 calibration cavities 0 5 2 0 and 5 0 x It is recommended to have an acoustic calibrator for the control of the
71. ata is send Block Start Header Description Format BLSTOO _ Block Start AT235 Appendix A page 4 Description Format BLENOO Block End Audiological Information Tone Audiogram Left Phone Header Description Format GTLP00 Hearing Level Frequency US dB US frequency US Right Phone Header Description Format GTRP00 Hearing Level Frequency US dB US frequency US Impedance Audiometry Tympanogram Left Ear Header Description GCLE00 Tympanogram Left Ear Old format GCLE01 Tympanogram Left Ear Right Ear Header Description GCRE00 Tympanogram Right Ear Old format GCRE01 Tympanogram Right Ear Compliance US Volume US Pressure US Gradient US Press1 US Compl1 05 Press2 US 2 US ComplianceReal US Compliancelmg US VolumeReal US Volumelmg US Pressure US Gradient US GradientUnit US NumberOfPoints US StartPressure US StopPressure US Pumpspeed US ProbeToneFreq US Press 0 US Complreal 0 US Complimg 0 05 Press NumberOfPoints US Complreal NumberOfPoints US Complimg NumberOfPoints US EOT Compliance US Volume US Pressure US Gradient US Press1 US Compl1 US Press2 US compl2 US ComplianceReal US Compliancelmg US VolumeReal US Volumelmg US Pressure US Gradient US GradientUnit US NumberOfPoints US StartPressure US StopPressure US Pumpspeed US ProbeToneFreq US Press 0 US Complreal 0 US Complimg 0 05 Press NumberOfPoints US Compleal NumberOfPoints US Com
72. be gt Press gt Real menu Place the probe into a cavity airtight connection Press the gt button until 400 daPa is reached and inspect the manometer Adjust the spring until the pressure decrease very slow down Pump again until 400 daPa is reached Inspect the manometer and if the pressure is stable or decrease very slow the adjustment is fine else turn the screw clockwise until the manometer is stable Repeat the pump procedure again and inspect the manometer for stable pressure Repeat this until the pressure is stable Now the spring is correct adjusted Before the contra nut is fasten the screw has to bee turned three times clockwise to be sure that the system is and will stay airtight AT235 Service manual page 10 Hardware Calibration To enter the calibration menus please switch off power hold down shift while pressing Print key turn on power again Hold the keys down until you can enter a password The factory setting of the password is 1 2 3 4 but dealer may have changed it in order to protect the calibration Note The hardware calibration is normally only done once in the instrument lifetime and at the factory Measuring points MP refers to Main board Index page 38 Measurements are made with reference to MP13 MP4 and MP15 GND Attenuator Calibration Enter the Attenuator Calibration menu from the Calibration menu by pressing F5 Att This is the calibration picture for channel 1 AC meter the AC
73. ble to find the key number Key name Code Key name Code Key Name Code F1 1017 Shift F1 1417 Tymp Reflex 1002 F2 1 1018 Shift F2 ____ 1118 EFF 1006 F3 1019 Shift F3 1119 Audiometry 1007 ta 10m Shift 1120 Man 1008 Shift F5 eisie 7 103 Shift Back 93 02 104 Print 7 1009 PrintScree 1109 Conra 1005 Pause 7 1001 NewSubect 1101 j s co e esee Sore 7 1010 No Response _ 1110 Left 1012 DUC C I Frequency Decr 1025 Incr 1026 Intensity Decr 1027 Intensity Incr 1028 Ext Range 1128 AT235 Appendix A page 10 Status Header Description Format SGRS02 Reduced instrument status Intensity Ch1 US Intensity Ch2 US Frequency US Input US Output US Transducer US Store Flag US EOT SGMEOO Active Menu US Submenu US EOT Input Output and Transducer The Input and Output parameter in the reduced status is a numerical value use the table below to obtain the Input and Output type Input type Code Output type Code Transducer Code Tone 771 RightPhne 2200 TDH39 1250 Pass Noise 10 LeftPhone 2201 EAR 1251 High Pass Noise 11 7 2202 CIR22 1252 Wide Band Noise 12 ProbeTone 2203 Handheld Probe 1253 Probe 2204 Clinic Probe 1254 12 Nootpt 122067 Active Menu and Submenu Menu Status ret
74. ction caused by inherent hysteresis of the system will be smaller with lower speed Automatic is a mode where sweep speed at the beginning will be Maximum 150 daPa sec and when the gradient is smaller than 5 the speed will be slowed to Medium 50 daPa sec When the peak is bigger than 5 again the speed will be set to Maximum 150 daPa sec again Compensation Mode Factory Compensated Range Compensated or Non compensated AT235 Appendix B page 2 Description Mode is set to Compensated if you want to have the curve displayed at the floor of the coordinate system In Non compensated mode the tymp curve will be displayed including the ear canal volume Gradient Unit Factory ml Range ml daPa or Off Description The gradient is an expression of the shape of the tymp curve Narrow or wide If ml is selected the gradient will be calculated the following way The program will go 50 daPa to each side from compliance value and save the two ml values The gradient is the average of the two ml values subtracted from the compliance value If daPa is selected the gradient will be calculated the following way The program searches from each end of the tymp curve and stores the pressure where the point at the tymp curve is equal to compliance value divided with 2 Gradient is equal to the two stored pressures subtracted from one another If Off is selected the gradient box will be removed from the user interface Setting up Reflex Tests
75. d header On Off Auto Off Error Auto is a state where the DSP itself switches off the interrupter after x mS Used a reflex measurement where tone is on for 500 mS This is what strings the instrument can send when it sends the OLAN09 Output Changed header Right Left Contra Probe Tone Probe Ipsi Probe Pressure No Output Bone Right Bone Left FF1 Right FF1 Left FF2 Right FF2 Insert Right Insert Left Error This is what strings the instrument can send when it sends the OLAN10 Transducer Changed header TDH39 EAR CIR22 Handheld Probe Clinical 71 Free Field Tymp Measurement Header Description Format probe tone frequency US pump speed US data US EOT NumberOfPoints US Tymp Data Compliance US Pressure US EOT The data pairs are transferred to the PC between the Test Start and Test Done or Test Aborted OLTAOO Test Aborted NumberOfPoints US EOT AT235 Appendix A page 16 Reflex Measurement Header _ Description OLREO2 Reflex Test Start Ear US Pressure at which reflex is tested US probe tone frequency US Reflex Method US Output US frequency US intensity dB US Reflex Box number US Count Of Reflexes in the current box US Index of Reflex in the Current Box US PointsInReflex US TimeBase US EOT OLRE01 R
76. d eet ec pee e e s 27 Diagrams 28 Components Valles ai ea 29 Keyboard Part avn aee ir ges 30 Mainiboard Hd ee te eoe 31 Components tte re eee edet d 38 ae Ue in as 39 e E he 45 Components Index Mien ee dee 46 Transducer 47 235 Service manual 1 Appendix Description of Serial Interface U U anas u u 1 General Specification isansa 2 eed d 1 Installing the USB Driver on the PC 1 CommuniCaltiOn uod erii peti ates tdeo Hace ea e e Ede d e He e ee Hee E ce do dtd dea 3 A diological Information Lies eue Masti He edd d need da 5 Impedance Audiometry inisiua nandien de en us 5 EEPROM Commands Inm quete Hg eae He He erg do agere ud avd He need ena 9 Informations tat i He ag t t PE e dcus 9 Remote Commiands ge Lon pedet
77. eflex Test Done NumberOfPoints at this level US EOT Reflex Data Compliance US EOT The data pairs are transferred to the PC between the Test Start and Test Done or Test Aborted HW Measurement Header Description Format OLHW00 Event US EOT Events for HW Measurement Test Started Test Done Test Interrupted Test Failed Changed Ear Retest Failed Retesting Audiometry Measurement also active during HW measurement Header Description Format OLSA00 Intensity Ch1 US Frequency US Masking Intensity US Status US OLPA00 Status US EOT Status in OLSA00 can be Heard and Not Heard When using the online mode it is not advisable to use static headers that requests data to be send out of the instrument 51 at the same time It will disturb the online transmissions from the instrument Most parameters send with the headers are send as text Example If the Right key is pressed the text Right is send Cochlear Implant For measuring on patients with Cochlear Implant it is possible to select a menu through USB where the compliance data is transmitted continuous to the host The data format is 1000 1 ml and is transmitted in with an US and an the end for each data the sample rate is 226 Hz Header Description Format SPKYOO Set the CI menu in the instrument 12060 US EOT CIENOO _ Start the Cl measurement ________ O CIDI00 Stop the
78. er than it is possible to in the PC application it is possible to change the number by selecting properties for the USB Serial Port then Click Hardware and Advanced the following window should appear AT235 Appendix A page 2 Advanced Settings for Port Number USB Transfer Sizes Cancel Select lower settings to correct performance problems at low baud rates Select higher settings for faster performance Defaults Receive Bytes 4096 Transmit Bytes 4096 BM Options Miscellaneous Options Select lower settings to correct response problems Serial Enumerator Serial Printer Latency Timer msec 16 Cancel If Power Off Set RTS On Close Disable Modem Ctrl At Startup Timeouts Event n Surprise Removal Minimum Read Timeout msec Minimum Write Timeout msec Change the COM port number in the drop down box Communication Serial Standard for Interacoustics A S Both the computer and the instrument can send out a request for information or send back requested information To make it easier to understand how the philosophy behind the Serial communication standard works for an instrument and a PC the following terms will be used The part that request information will be called a Master and the part who will send back requested information will be called a Slave Master slave communication Figure 2 Data transmission between the Master
79. escription f Yes is selected the subject menu will appear when pressing New Subject where it is possible to enter subject data and or delete current data and proceed with a new measurement If No is selected a dialog box saying All Data Deleted will appear shortly and the instrument is ready for a new measurement Clinic Setup Drejervaenset 8 C LEY n tra Denmark 45 65 71 55 55 45 63 71 55 22 interacoustics dk into interacoustics dk 47202712 Edit Clinic Setup Figure 33 The Clinic Setup lets you insert your clinic data used for printouts Note that the setup item Clinic Data Printout in the Common Menu needs to be On before data comes out on paper To enter data you need an AT keyboard ordinary PC keyboard attached to the AT235 while entering data AT235 Appendix B page 13 Appendix Advanced User Setup Advanced User Setup This appendix describes the advanced setup functions of the AT235 Probe Headset EEPROM Att Fixed The Calibration Menu Figure 34 In the Calibration menu there are two issues of interest for setting up the AT235 The first is the Advanced User Setup and the second is the setup storage facilities the EEPROM menu Note that it requires a password to access the Calibration and that entering the calibration menu is done during power up by holding down lt shift gt and lt print gt until you can ente
80. ge Ipsi or contra Description Can be assigned to Ipsi or contra as output Stimuli Frequency Factory See Table 1 Range Ipsi is 500 Hz 1000 Hz 2000 Hz 3000 Hz 4000 Hz WN LP or HP Contra is 125 Hz 250 Hz 500 Hz 750 Hz 1000 Hz 1500 Hz 2000 Hz 3000 Hz 4000 Hz 6000 Hz 8000 Hz WN LP or HP Description Can assign new stimuli to Ipsi or contra Level Factory See Table 1 Range 60 dB to Maximum depend of transducer and selected frequency Description If Reflex Method is selected to Sequence an arrow will be put after the intensity value to indicate that this is the start level In table 1 you will find that the factory test configuration will perform 4 of the 6 reflexes Setting the last row to on off depending on what you want to start with can choose this Reflex Methods The Reflex Method can be assigned to 4 different methods where three of the four methods have additional setup points In the following you can see what they do and how to set them up AT235 Appendix B page 5 Setur menu for Reflex Test A Reflex method Fixed Reflex Method Fixed Figure 22 Method description A fixed intensity reflex is one reflex taken at one intensity level like the one in Figure 7 100 dB HL Fixed Reflex Figure 23 Screening 10 dB Steps nins 1098 Sters Reflex Method Screening 10 dB Steps Figure 24 AT235 Appendix B page 6 Method description The Screening method
81. he reflex intensity level reaches maximum intensity level for the transducer the search is done accepting the reflex found AT235 Appendix B page 7 Reflex sensitivity Factory Normal Range Sensitive Normal or Robust Description See Reflex Sensitivity Sequence Setur menu for Reflex Test A general driftins Normal riteria 2 Automatic sensitivity Normal Fi F2 F3 F4 F5 Back Reflex Method Sequence Figure 26 Method description The sequence method gives the possibility of having up to 6 single reflexes in one Figure The level from the table is used as start level and the jump between each reflex can be set in Level increase The screening method has stop criteria so it stops the measurement if the reflex is equal to or bigger than the reflex sensitivity test box The function can be selected on or off and the level of sensitivity can be selected in the Reflex Sensitivity item Reflex Sequence Figure 27 Reflexes pr sequence Factory 6 reflexes pr sequence Range 2 3 4 5 or 6 reflexes pr sequence Description Lets you have up to 6 reflexes pr sequence Note that the higher the number of reflexes is the less detailed the graphic will be Level of increase Factory 5 dB Range 5 6 7 8 9 or 10 dB Description How many dB the intensity will be increased between each single reflex AT235 Appendix B page 8 Compensation for general drifting Factory Normal Range Off and Normal Descriptio
82. igure 13 How to calibrate 1 Select by means of frequency increase decrease the frequency to be calibrated or start to calibrate the pre selected frequency 2 Press intensity increase decrease for channel 1 until the desired sound pressure level has been achieved 3 Press store The instrument will automatically jump to the next frequency 4 Continue to calibrate the new frequency or select another 5 Selecta new output by pressing Right or Left and repeat from step 1 6 Selecta new output TDH39 CIR22 or pressing F1 2 and repeat from step 1 To test the headset Calibration AT235 Service manual page 19 When done with the headset calibration you can enter the Headset Real Mode to test the calibration Select Real F6 to enter this menu Factory Calibration Values Calibration EEPROM Setur Menu WARNING Use of the menu items of this menu can chanse the calibration F5 and F6 and the normal use of the instrument F1 Stores all seturs in Original F2 Restores all seturs to F3 Restores all setups to Factory Store Restore Factory Calib Total F1 FS Fe FS P6 Service Menu Figure 14 If needed it is possible to insert factory data for either the calibration or for the whole setting of the instrument Insert Factory Calibration Values The Calib F5 function inserts factory values all over the calibration calibration values maximum levels
83. ing the Setup uwes in cie cine ca ren 8 Appendix U Update News 1 AT235 Service manual page 2 General Technical Specifications Medical CE mark Standards Power UPS400 Operation environment Storing handling Warm up time The CE mark indicates that Interacoustics A S meets the requirements of Annex of the Medical Device Directive 93 42 EEC Approval of the quality system is made by TUV identification no 0123 Safety EMC Impedance Audiometer Consumption Mains voltages and fuses Temperature Rel Humidity Impedance Measuring System Probe tone Air pressure Compliance Test types Indicators Memory Frequency Level Control Indicator Range Pressure limitation Pressure change rate Range Tympanometry Eustachian Tube Function Graphical display Tympanometry Eustachian Tube Function Reflex and Audiometer Functions Signal sources Inputs Outputs Attenuator Test types Test types Memory Tone Contra Reflex Tone Audiometry Tone Ipsi Reflex Noise Contra Reflex Noise Ipsi Reflex Patient Response Earphone Right Left Contra Earphone Ipsi Earphone Air USB Keyboard Range Manual Audiometry Automatic Audiometry Manual
84. is an auto test for detecting reflexes Starting at level from the reflex table the automation will do a reflex measurement and verify the reflex against the reflex sensitivity box see Reflex Sensitivity If the reflex is bigger than the sensitivity box the test is done not the intensity level will increase with 10 dB and do another reflex This will continue until the reflex is bigger than the sensitivity box or until maximum intensity level has been reached Reflex Sensitivity Factory Normal Range Sensitive Normal or Robust Description See Reflex Sensitivity Auto 5 dB Steps Setur menu for Reflex Test A Reflex sensitivity Reflexes F1 F2 F3 F4 F5 F6 Back 0600000 0 Reflex Method Auto 5 Figure 25 Method description The auto test method is bit different from the screening method presents a stimulus for a time of approximately 80 mS where after it verifies the compliance against the start compliance If the difference is bigger than the size of the reflex sensitivity test box see Reflex Sensitivity it performs a reflex measurement The reflex is then tested against the reflex sensitivity test box If the reflex is outside the test box the reflex measurement is done If not the instrument performs the same test once again If the search fails after second attempt the instrument will continue the search with the screening method in 5 dB steps instead of the currently auto search If t
85. itch Factory L R Range Pause Off or L R Description Selects the function of the key on the impedance transducer Manual Reflex Attenuator Factory 5 dB Range 1 20 5 dB Description How many dB s the intensity will increase decrease when pressing the dB keys manual impedance mode AT235 Appendix B page 11 Reflex Icon Boxes Factory 6 boxes Range 4 or 6 Boxes Description Selects between 4 or 6 reflex icon boxes see Figure Cu anii T i 0506 50281 5 75 gt 9 5 S00Hz 1 1000 2 2 2000 2 5 4000424 5 6 6 Reflex Icon Boxes 4 vs 6 Reflex Icon Boxes Figure 32 Printer Factory Internal Range Internal HP PCL L3 IBM Mode or Off Description Select what type of printer that is attached to the instrument Note The HP PCL L3 mode shall be selected in when connecting a HP Laser printer Subject data printout Factory On Range On or Description f On is selected the subject information will be printed together with subject data Note Only available when using internal printer Clinic data printout Factory On Range On or Off Description If On is selected the clinic information will be printed together with subject data Print After Test Factory Off Range On or Off Description When a test is done and data are recorded on both ears a print out will be done on the selected printer AT235 Appendix B page 12 Keyboard Connected Factory No Range Yes or No D
86. itr 0005 00006 D01007001 AT235 TRANSDUCER top Bottom side xitr 0006 00005 D01007101 AT235 TRANSDUCER bot amp AT235 Service manual page 46 Transducer Part List PCB 69009601 66905 Assembled Board 51000101 66918 Quantity Part Reference Q 9 A1 2 C1 C2 C3 C6 C10 C11 C5 C9 C12 C16 C7 C8 C13 C14 C15 D1 IC3 IC4 2 1 2 5 7 1 2 1 N3 6 N7 8 N10 N11 N12 N13 N14 N15 1 R2 R3 R4 R5 R10 R13 R6 R9 R7 R8 R15 R11 R12 R14 R16 R17 R18 SW1 TD1 V1 Part Number 45108401 61401701 61400101 61400201 61003301 61444301 61401101 61702901 62008201 62006001 62000701 60304001 60420401 60423901 60403001 60403601 60402001 60401701 60406401 60403901 60402301 60208601 60400201 60225601 60420301 73902201 76000401 64300301 Value Toleranc e labels 10n 1 22n 10 100p 1 10 20 270 100 10 LED RGB DG419 LM6171 OP275 Pad Mp Pad 178K 1 33K2 1 8K25 1 4K99 1 1K 1 20K 1 100K 1 16K2 1 13K3 1 12K4 1 24K 1 10 1 9K53 1 49K9 1 KSA211 SDX01D 4 78L05 AT235 Service manual page 47 Appendix Description of Serial Interface General Specification The Serial interface is
87. lave Value US EOT Setup Name Setup Number Value Range Tympanometry Setup Start Pressure 191 25 25 36 300 daPa 23 25 daPa 12 High 13 Automatic Reflex Setup A Reflex Method 91 10 Fixed 11 Screening 12 Auto 13 Sequence Test Stop Criteria 0 Off 1 On Reflex Senitivity 93 10 Sensitive 11 Normal 12 Robust Reflexes pr Sequence 10 2 reflexes 14 6 reflexes Level increase 95 1025dB 15 10 Compensate for general drifting 96 0 1 2 10 11 Contra 60 60 dB Max Output get Reflex Setup add 50 to Number a ee Common Setup Power up 215 10 Tymp 11 Tymp and Reflex 12 L R or Pause 13 AT235 Appendix A page 12 Setup Setup Number Value Range Advanced Setup 74 LSB Contra Headset 76 10 Cir22 11 TDH39 s 5 12 Combi Enable ETF Test 0 Disable 1 Enable Height above sea level 78 0 0 100m 25 2500 2599m Seal Sensitivity 2222 80 10 Normal 11 Sensitive Advanced Reflex Setup Display Reflexes 0 Positive 11 Negative Compliance Change 0 ml 11 Max Reflex scale limit 10 0 10 ml 11 0 15 12 0 20 ml 13 0 25 ml Stimuli Selection 250 2 46 0 1 750 2 48 0 1 On 1500 Hz 0 1 On 3000 Hz 0 Off 1 4000 2 0 Off 1 On 6000 Hz 0 1 On 8000
88. measurement C C CIPROO Pressure US EOT 00 Pressure US EOT 600 daPa and max 300 235 Appendix 17 Communication Windows In this section sample code show how the communication could be made it is using the ActiveX Control MSComm32 the code is compiled in Visual C 6 0 This function opens the specified com port at 38400 baud even parity 8 bits and 1 stop bit The receive threshold is set to 1 byte BOOL OpenPort int PortNo CString SettingStr SettingStr 38400 E 8 1 m_CommControl SetCommPort PortNo m_CommControl SetSettings SettingStr m CommControl SetHandshaking 2 m_CommControl SetPortOpen TRUE m CommControl SetRThreshold 1 return m CommControl GetPortOpen This function sends string out void SendString CString StringToSend VARIANT OutString OutString vt VT BSTR OutString bstrVal StringToSend AllocSysString m_CommControl SetOutput OutString This function calculates the CRC value and inserts into the string CString CTestAT235Dlg CalculateCRC CString StringToCalculate int CRCValue 0 Counter CString CRCString for Counter 0 Counter lt StringToCalculate GetLength Counter CRCValue StringToCalculate GetAt Counter sprintf CRCString GetBuffer 10 5 CRCValue
89. n 22n 22n lt gt GND GND 100 4 RESET gt DDRESET 10496 GND C378 22n E 221 KM416C1200CJ 10 GND GND 40 18 al 0 00 Y N86 7 tee N85 4 Yen ur 1 04 c20 R164 TART Rieg hec VDD heet7 cvdd 0 7 NIENTE c10 R172 as A10 WE cii 8195 cvdd0 ie T0K IC60 E 8 ETT EEPROM 90 D e PAT RESP CO9 CO20 pao 17 ROWO A12 c4 146 E meer d di D1 REMOTE KEY 1 59 6 01 ROW1 GG 8 gt FLASH 15 SS Row2 VDD a 0 92 D2 paz 2 1 114 8 02 2 i 2 NC GND R149 104 12 43 PF 44 14 SSROW3 5 ji BSY z D3 PA3 1 114 6 434 D3 8 DY BSY ur Y7 94 __43 104 4 PA4 IC114A 3 5 D4 PA4 TE WO R171 REW A R150 45 42 D5 PA5 Probe select 1 59 3 A D5 PAS ROWS 195 a K 46 9232 CO26 12 K y n PA6 ps Ez 3 318 97 n CO2613 07 PA7 iSo ROW T 109 N MEM LCD 1651 25 D7 AUD OT S ARDY 20 a 4 c4 161 ARDY 5 DSPiCS 1042 61 co aziar AST8 ASTB a ppp A OP ASIDRAM2 5 526 PB0 A3 D DSP WR 1C42 64 IEO PBO TSW 1C79 3 COLI VDD R367 A DHAMA L 1642 62 PBI pu 6 5 22 ss BE OLK IC100 4 20K A6 DRAM5 N 684 9 RD 54 G 7
90. n During a sequence reflex measurement the compliance may drift as you can see in the figure below To compensate for this drift select the Normal and the reflex drift will be removed 105 dB 75 85 95 105 dB Reflex with compliance drift Compensated reflex Compliance drifting Figure 28 Test stop criteria Factory Off Range On or Off Description Let you select if you want to skip the rest of the reflexes in a sequence when the condition are matched and continue with the next sequence Reflex Sensitivity Factory Normal Range Sensitive Normal or Robust Description See Reflex Sensitivity Reflex sensitivity When using reflex the automatic methods Automatic or Screening the AT235 uses an algorithm to determined if a reflex is okay or not The level of sensitivity can be set with setup item Reflex Sensitivity where you can choose between Sensitive Normal or Robust The AT235 has two different modes of leveling sensitivity ml or can be set in the Advanced User Setup and depending on what method you will get different results Look in the following Figures for the difference When using auto search for reflexes the algorithms in the software will go on until intensity has reached maximum level for the selected transducer at the give frequency So the software in two ways can accept the reflex the reflex does not touch the test box the test box is normally invisibly or intensity is at maximum level You can se wha
91. obe system for Reflex measurements Connection of the air system to the probe Input output for computer communication An external PC can be made to both monitor and control the instrument The control actions can be followed on the display and operation panel Online communication can be selected where the measured data will be sent to an external PC See separate section in Service Manual for programming details Connection for external keyboard standard PC type 0 to 130 dB 1 or 5 GB steps Typical range is 10 to 120 dB HL Range is individual for different modes see table 1 Manual control of all functions Auto threshold according to ISO 8253 1 Patient controlled Hughson Westlake The threshold is determined by the activation of the patient response Manual control of all functions Manually controlled with stimulus duration of 10 s 6 ipsi and 6 contra graphs curves Each can have up to 6 pulses AT235 Service manual page 3 There is additional capacity for 6 manual tests Printer Optional Type Thermal printer with recording paper in rolls Paper width 112 mm Printing time 21 s for worst case 2 tympanograms 16 reflexes 2 audiograms Table 1 Frequencies and intensity ranges Frequency _ Audiomety Hz 1000 2000 In 250 3000 10 500 4000 6000 8000 WB noise LP noise HPnose 10 120 10 values
92. on Makes it possible to change the instrument name Note You need an AT Keyboard to change this item and Keyboard On must be selected in the Common menu Dealer Name Factory Interacoustics A S Description Makes it possible to change the Dealer name The Dealer name appears on the top of thermo printout Note You need an AT Keyboard to change this item and Keyboard On must be selected in the Common menu AT235 Appendix C page 2 sensitivity Sensitive This gives reproducible results Require quiet probe handling Normal Quicker seal detection and less sensitive than the above selection Robust Very quick seal detection AGC on the probe tone is disabled Advanced Reflex User Setup Calibration Fi F2 F3 F4 FS F6 Back Advanced Heflex User Setup Figure 36 Display Reflexes Factory Positive Range Positive or Negative Description Selects how to display the reflexes in the diagrams 100 dB HL 100 dB HL 100 dB I 100 dB 00 1 100 dB 100 dB I 0 I 2000 Hz 1 1000 Hz 2 2000 Hz 3 4000 Hz 4 2000 Hz 1 1000 Hz 2 2000 Hz 3 4000 Hz 4 Positive Negative Positive and Negative reflex display Figure 37 Complaince Change Factory ml Range ml or Description This setup item is used in connection with the Reflex Sensitivity setup item from the Reflex Test A B menu Choose between ml 0 05 0 10 or 0 15 ml and 2 4 or 6 of ear volume AT235 Appendix C page 3 Reflex
93. on properties Probe tone Frequency Level Distortion Compliance Range Temperature dependence Pressure dependence Reflex sensitivity Temporal reflex characteristics Pressure Range Safety limits Telephonics TDH39 with a static force of 4 5N 0 5N Ipsilateral Earphone is integrated in the probe system 226 Hz transmitter and receiver and pressure transducer is integrated in the probe system Telephonics TDH39 with a static force of 4 5N 0 5N Generally the instrument is made and calibrated to be within and better than the tolerances required in the specified standards 3 3 dB for 250 to 4000Hz 5 dB for 6000 to 8000Hz 5 dB for 500 to 2000Hz and 5 10 dB for 3000 to 4000Hz 5 or 10 daPa whichever is greater 5 or 0 1 ml whichever is greater 226 Hz 1 85 dB SPL 1 5 dB measured in an IEC 126 acoustic coupler The level is constant for all volumes in the measurement range Max 5 THD 0 1 to 6 0 0 003 ml C 0 00020 ml daPa 0 001 15 the lowest detectable volume change Initial latency 10 ms 5 ms Rise time 75 ms 5 ms Terminal latency 10ms 5 ms Fall time 75 ms 5 ms Overshoot max 8 Undershoot max 10 Values between 600 to 300 daPa can be selected in the set up 700 daPa and 500 daPa 100 daPa Reflex audiometer calibration standards and spectral properties General Specifications for stimulus and audiometer signals are made to follow
94. plimg NumberOfPoints US EOT AT235 Appendix A page 5 IPSI Reflex Left Ear Header Description Stimulus1 US dBHL1 US Pressure1 US Compl11 US Compl12 US US GS Stimulus2 US dBHL2 05 Pressure2 US 21 US 22 US RS Frequency US Pressure US Method US NumberOfPoints US 481 05 05 mi 0 US mS NumberOfPoints US ml NumberOfPoints US GS dB2 US CurveData GS until dB6 if the method is sequence GRILOO IPSI Reflex Left Ear Old format GRILO1 IPSI Reflex Left Ear Right Ear Header Description and 6 reflexes recorded Stimulus1 US dBHL1 US Pressure1 US Compl11 US Compl12 US US GS Stimulus2 US dBHL2 US Pressure2 US Compl21 US Compl22 US RS Frequency US Pressure US Method US NumberOfPoints US dB1 US 05 05 mS NumberOfPoints US ml NumberOfPoints US GS dB2 US lt CurveData gt GS until dB6 if the method is sequence GRIROO IPSI Reflex Right Ear Old format GRIRO1 IPSI Reflex Right Ear Contra Reflex Left Ear Header Description GRCL00 Contra Reflex Left Ear Old format GRCL01 Contra Reflex Left Ear Right Ear Header Description and 6 reflexes recorded Stimulus1 US dBHL1 US Pressure1 US Compl11 US Compl12 US US GS Stimulus2 US dBHL2 US Pressure2 US 21 US 22 US RS Frequency US Pressure US Method US NumberOfPoints US dB1 US mS 0 US ml 0 US mS NumberOfPoints US ml NumberOfPoints US GS dB2 US lt CurveData gt GS until dB6 if the
95. r the password The Advanced User Setup The first setup that appears when pressing Setup F1 in the calibration menu is a setup for common stuff Calibration Start Ear Advanced User Setup Figure 35 Start Ear Factory Right Range Right or Left Description Here you may choose which ear to select automatically for the first test AT235 Appendix C page 1 Password Factory 1234 Range Each digit can be change within a range of 0 to 9 Description Makes it possible to change the password for entering the calibration Note You need an AT Keyboard to change this item and Keyboard On must be selected in the Common menu Contra Headset Factory TDH39 Range Cir22 TDH39 or EAR 3A Description Here you may choose which contra headset to use Impedance Transducer Factory Handheld Range Handheld or Clinic Description Gives you the possibility to change between the Clinical and the Handheld impedance transducer Note that the transducer might need to be calibrated before use and that the AT235 can hold calibration sets for both transducers at the same time Enalbel ETF1 Test Factory Enable Range Enable or Disable Description you select disable it is not possible to start the ETF test Height above sea level Factory 0 99m Range 0 2599 m in 100 m steps Description To give a more precise measuring system especially at high probe tone tympanometry Instrument Name Factory AT235 Descripti
96. ramming Following Improvements are made for instruments from no 639427 Not compatible to previous versions New Main board Redesign for USB connection New Keyboard Connections for Main board modified New Rear panel Serial communication modified from RS232 to USB New software version 2 00200 Following Improvements are made for instruments from no 206321 Ferrites L1 L4 L6 and L7 are replaced with 0R resistors due to intermittent measurement errors after introducing lead free version of DSP All instruments shipped after 29 03 2006 have been modified including some instruments with lower serial number than 206321 This modification is described in technical note 0602 dated 22 03 2006 Following Improvements are made for instruments from no 189850 New Display Compatible to previous Display Fulfilling the RoHS directive Inverter PCB is not longer mounted resistor R204 is mounted AT235 Appendix U page 1
97. ressing Change F1 you can change the settings for the item selected by the menu bar Leaving a Menu When the changes are made press the lt Back gt key No changes are stored before you leave the menu and if anything is changed the instrument will ask you to save data or not Please note that you have to press Yes F1 or No F6 Setur menu for Reflex Test A Save data at menu exit Figure 16 AT235 Appendix B page 1 User Setup This is the description of the navigation in the User Setup in AT235 and which options can be changed from the setup Tympanometry Setup Setup Menu Pume Speed Compensation Mode C Gradient Unit Chanse F1 TPB VR 2 FO Setup Figure 17 Start Pressure Factory 200 daPa Range 300 to 25 daPa in 25 daPa steps Description Start Pressure indicates what pressure will be established as start out point for the pressure sweep Stop Pressure Factory 400 daPa Range 25 to 600 daPa in 25 daPa steps Description 15 the pressure where the sweep will stop Pump Speed Factory Automatic 150 daPa sec 50 daPa sec 150 daPa sec Range Minimum 17 daPa sec Medium 50 daPa sec Maximum 150 daPa sec or Automatic 150 50 daPa sec 150 daPa sec Description slow speed will be more time consuming but may give more detailed information The horizontally displacement of the tympanogram peak in the sweeping dire
98. scale limit Factory 0 15 ml Range 0 10 ml 0 15 ml 0 20 ml or 0 25 ml Description Is used to select the scale of the ml axis of the reflex diagram 100 dB HL 0 10 ml scale 0 20 ml scale 0 25 ml scale Same Reflex in different scales Figure 38 Stimuli Selection Factory All frequencies are selected as factory setting Range 250 Hz 750 Hz 1500 Hz 3000 Hz 4000 Hz 6000 Hz 8000 Hz WN LP and HP can be selected as On or Off Description Use the frequency keys to select the desired frequency and press Change F1 to select or Note This item has influence on both ipsi and contra frequencies Ipsi frequencies 500 Hz 1000 Hz 2000 Hz 3000 Hz 4000 Hz WN LP HP Contra frequencies 250 Hz 500 Hz 750 Hz 1000 Hz 1500 Hz 2000 Hz 3000 Hz 4000 Hz 6000 Hz 8000 Hz WN LP HP Autotest Max upper limit Factory 110 dB Range From 90 dB to 110 dB in 5 dB steps Description Safety percussion to prevent the subject to get a higher output level than the level from this setup item during an impedance auto test measurement AT235 Appendix C page 4 Default manual intensity Factory 80 dB Range From 60 dB to 90 dB in 1 dB steps Description Start intensity level for manual impedance audiometry AGC for ipsi reflex stimuli Factory Off Range On or Off Description If ear volume is smaller than 2 ml the AGC Acoustic Gain Control for ipsi reflex stimuli will correct the level with the same level correction
99. stment level To calibrate Probe tone levels Follow instructions on the screen Fine F4 and Rough F5 Fine and Rough gives the resolution of the steps when adjusting the probe tone level You can see what resolution that is selected when looking at Adjust Resolution at the display Selecting Fine the resolution will be 0 1 dB and selecting Rough the resolution will be 0 5 dB AT235 Service manual page 15 Compliance Calibration ibration 4400 1200 Compliance Calibration Figure 8 Entering this menu you need to confirm that the Probe Tone is calibrated correctly see Probe Tone Calibration If not press Exit F6 and go trough the procedures of Pressure Calibration and Probe Tone Calibration To calibrate Compliance Press Calib F1 and follow the instructions on the screen To test the Probe Calibration If the probe is calibrated you can test the calibration among other things in the Probe Real Mode Select Real F6 to enter this menu AT235 Service manual page 16 Probe Real Mode Calibration Prol Real Mode tus Pume Ctrl Mode Figure 9 This menu is designed for testing the calibration of the Probe system and the pressure safety valves Manual pump control Use F1 or F2 to change Pump Control status window to the right until it shows the descried pump pressure Notice the Pressure status window below Safety valve test The safe
100. stor 2 R23 R57 60429301 43K2 1 0 1W 0603 Resistor 3 130 L31 L32 60400102 OR 0 1W 0603 Resistor 11 109 R130 R131 R133 R204 R208 60400102 OR 0 1W 0603 Resistor R252 R254 R323 R359 R360 1 L35 63705701 SCBB1207 100E 10uH Inductor 21 6R 5 40A MOTOCRAFT 12 MP1 2 MP4 MP5 MP6 MP7 64000101 Testpin 1206 Testpin RCSCTE MP8 MP9 MP10 MP12 MP13 2 R1 R33 60404001 10 5 1 0 1W 0603 Resistor 2 R2 R32 60403901 13K3 1 0 1W 0603 Resistor 9 R34 R134 R168 R170 R288 R292 60403801 2K21 1 0 1W 0603 Resistor R310 R358 89 R4 R13 R36 R37 R43 R55 R56 R63 60400201 1 0 1W 0603 Resistor R64 R66 R67 R69 R70 R72 R77 R78 R79 R80 R81 R82 R83 R84 R85 R86 R87 R88 R89 R92 R95 R99 R102 R108 R112 R137 R142 R144 R145 R153 R156 R157 R159 R161 R165 R166 R171 R172 R179 R181 R184 R186 R189 R190 R192 R194 R195 R213 R218 R221 R222 R223 R224 R233 R234 R245 R246 R247 R248 R249 R250 R266 R267 R272 R273 R283 R290 R293 R298 R299 R300 R301 R302 R308 R309 R313 R314 R315 R322 R328 R377 8 R5 R6 R45 R53 R143 R294 R365 60401901 1K5 1 0 1W 0603 Resistor R368 4 R7 R11 R40 R42 60403101 5K36 1 0 1W 0603 Resistor 13 R8 R28 R114 R127 R136 R140 R151 60403601 1K 1 0 1W 0603 Resistor R152 R163 R185 R237 R257 R259 2 R9 R51 60403501 3K92 1 0 1W 0603 Resistor 6 R10 R41 R110 R118 R268 R269 60403201 30K1 1 0 1W 0603 Resistor 3 R15 R61 R94 60402301 12K4 1 0 1W 0603 Resistor 6 R16 R29 R44 R46 R47 R74 60400301 21K
101. t ATTOUT 1 4 99 VDD1 GND NPO GND 1n V 10 10K VEE1 A 1 GND X7R R13 AD8671 GND VEE1 V NPO VDD1 VDD1 GND 221 22 GND VEE1 A A A GND 10 10 C28 C22 GND 1 c2 22 22 22n 22n V GND X 10 10 R9 10 10 V 3K92 V X V NP NP 2 IC111 GND GND VEE GND 6 174 6 3 C12 V 243K i 22n 1 08671 R333 er 225440 10 V V NP R334 i C85 GND GND 10 Power Supply X5R 1053 38 CS 2 viti gt E 1 53 14 OV 1 53 15 COMDATA 2 1 11 nw 17V to 22V E R57 2 5 VDD Att Control Vref att lt La lu 10 Vref_pmp 5 0V GND 2 X7R Vref 5 0V i VDD1 GND SYM 43K2 ET Test point 88 1 1 85 852 1 lt 12 e ea 2 35 N6 VDD 22n 22 1 jo N2 en 10 10 6 VDDi GND _ 7 ue GND VERI VDD VDD1 RE l Ne NOTIS zan H VEE vee eT 10 R74 SW1 C DGND 10 10 2 5 RW3 R68 SW2 C AGND GND ATTDC2 gt gt __ i Le SW3 C AGND GND VBE1 CATS40125 1C26 3 AK SW4 C AGND Sheet 4 AD8672 6K81 AGND Ge AD8672 SW1 I SW1 O 34 1 SW2 O mH sws sw3 O oag R60 4 75 5 12KHz LPF 10
102. t a test box is by looking at the Figures below The test box is the dotted rectangle in the middle of the Figure AT235 Appendix B page 9 Reflex sensitivity 105 dB HL 105 dB HL Sensitive 0 05 ml Normal 0 10 ml Robust 0 15 ml Reflex Sensitivity in ml Figure 29 The first reflex is okay because the reflex does not touch the test box The two last reflexes is not okay according to the algorithm but has been accepted because of maximum intensity level Reflex sensitivity in 90 dB HL Sensitive 2 Normal 4 Robust 6 Reflex Sensitivity in Figure 30 All three reflexes are okay because none of them is inside or touching the test box The height of the test box when using sensitivity depends on the size of the ear volume The sensitivity condition is used by the auto method screening method and by the sequence method Note The test box is not shown in the AT235 software It only serves as examples of what sensitivity is and how we it AT235 Appendix B page 10 Common Setup Common Setup Figure 31 Power up Factory Tymp and Reflex Range or Tymp and Reflex Description Selects what menu the instrument will go to after power up Pause default Factory Off Range On or Off Description If On is selected the pause key is pre selected when a test is finished and when entering the automatic impedance menu Communication Factory USB Range USB Remote Sw
103. t how much the Intensity is decreased when the frequency is changed HW Frequencies Factory All frequencies are Off as factory setting Range 125 Hz 250 Hz 750 Hz 1500 Hz 3000 Hz 6000 Hz and 8000 Hz can be selected as On or Description 2 2 frequency keys to select the desired frequency press Change 1 to select Conditions Factory 2 out of 3 Range 2 out of 3 or 3 out of 5 Description 15 used to select the threshold method H W Test The possibilities 2 responses out of presentations or 3 responses out of 5 presentations on the same dB value AT235 Appendix C page 7 Letter Printout Error Internal printer Some of the internal printer modules thermo printer can loose their font data and therefore do printouts with errors in the letters If this error should occur please use this option to restore fonts in the internal printer module Note If not the internal printer option is selected in the Common menu this menu item will be invisible Press Print F6 in the Advanced User Setup and follow the instructions on the screen Note Before restoring the fonts a jumper must be placed on the printer interface board connector J3 see Printer Connections for details Storing Restoring the Setup Calibration EEPROM Setur Menu WARNING Use of the menu items of this menu can chanse bration F5 and F6 and the normal use of the instrument s to Factory Store
104. the necessary qualifications approved by Interacoustics Before any kind of the calibration can take place the AT235 must have been on power for at least 3 5 minutes in a normal temperature milieu and the instrument must be in the same milieu for a reasonable time While keeping lt shift gt and lt Print gt buttons down switch power on at the rear panel of the instrument By use of the F keys enter password 1 2 3 4 The AT235 is now in software calibration menu If a printer is connected to the instrument is it possible to get a complete detailed description of the instrument set up While keeping shift and Store buttons down switch power on at the rear panel of the instrument The AT235 has to kinds of calibration hardware and software calibration The software calibration can be done without opening the instrument When the instrument has been hardware calibrated it must be followed by a software calibration Error in stored data EEPROM Error If any error occurs in stored data an error dialog box is displayed when powering up The text will be EEPROM Error Contact Technician Please power off and on the instrument once if the problem still occurs please see instruction below Before trying anything please read the whole instruction and be aware that the instrument needs to be re calibrated no mater what you do What happens if Should this error box occur press lt shift gt lt Print gt Enter the p
105. til dB6 if the method is sequence and 6 reflexes recorded Decay Contra Reflex Left Ear Header Description GACL00 Decay Contra Reflex Left Stimulus US dBHL1 US Pressure1 US Result US Timebase1 Ear Old format US Compl11 US Compl12 US US GS Stimulus2 US dBHL2 US Pressure2 US Result2 US Timebase2 US Compl21 US GACLO1 Decay Contra Reflex Left Frequency US Pressure US Method US NumberOfPoints US GS Ear dB1 US mS 0 US ml 0 US mS NumberOfPoints US ml NumberOfPoints US GS dB2 US lt CurveData gt GS until dB6 if the method is sequence and 6 reflexes recorded Right Ear Description GACR00 Decay Contra Reflex Stimulus US dBHL1 US Pressure1 US Result US 1 Right Ear Old format US Compl11 US Compl12 US US GS Stimulus2 US dBHL2 US Pressure2 US Result2 US Timebase2 US Compl21 US 1 Decay Contra Reflex Frequency US Pressure US Method US NumberOfPoints US GS Right Ear dB1 US mS 0 US ml 0 US mS NumberOfPoints US ml NumberOfPoints US GS dB2 US lt CurveData gt GS until dB6 if the method is sequence and 6 reflexes recorded AT235 Appendix A page 7 ETF1 Left Ear Header Description GILE00 ETF1 Left Ear Old format GILE01 ETF1 Left Ear Right Ear Header Description GIRE00 ETF1 Right Ear Old format GIRE01 ETF1 Right Ear ETF2 Left Ear Header Description Volume US Pressure1 US Press11 US Compl11 US Press12 US Compl12 US US GS Pressure2 US Press21 US
106. ty valve in the pressure system is designed with 800 daPa as minimum and 600 daPa as maximum limits for pump pressure normal pressure range is 600 to 300 daPa Note The safety valve may release before limits Connect a manometer to the pressure system that can measure pressures from 800 daPa to 600 daPa Press Valve F3 until the manometer stops its movement Notice the pressure and if the pressure lies within 800 and 650 daPa the valve works properly Press Valve F4 until the manometer stops its movement Notice the pressure and if the pressure lies within 350 and 600 daPa the valve works properly Ipsi Calibration Calibration 500 Hz 13 0 dB Ipsi Calibration Menu Figure 10 This is the ipsi calibration menu AT235 Service manual page 17 In the audiogram the screen picture you can see the calibration of the ipsi transducer and the calibration level by looking at lines The dotted lines are the calibration values drawn with offset in the calibration level normal line Above the audiogram we have an information window The information window The information window contains information that can be helpful working with the calibration The figure below shows what kind of information that is displayed Patient Response Current Frequency 2 Co 8048 500 Hz 13 0 dB Tone Switch Current Level Calibration Value Frequency Maximum Level Information Window Figure 1
107. urns the Active Menu value use the table below to obtain the name of the menus The Submenu is only used in Impedance Menu It is possible to select a Menu with the SPKY00 command and the codes below Active Menu Code Active Menu Man _________ 12000 Pressure Calibration 12024 Setup 7 12001 Compliance Calibration 12025 Setup _____ 12003 Probe Tone Calibration 12027 Subject 12007 Probe Real Mode 12028 Calibration 7 12000 12029 Tympanometry Setup 12011 Modify ________ 12030 Password 7 12012 Manual Audiometry ___ 12031 Reflex Setup _______ 12013 Impedance 12032 Headset Real Mode 12015 Famili Test _______ 12033 Fixed Attenuator 12016 HW Test 12034 Advanced Setup _____ 12017 Manual Reflex 12035 EEPROM Setup T2018 ETF1__ 12036 Advanced Reflex 12019 IPSI Calibration 12037 Advanced Audiometry 12020 Headset Calibration 12022 Refex 512 Probe Calibration 12023 Tympanogram Reflex 12 AT235 Appendix A page 11 Setup Items The Setup Items in the Instrument can be read and written with the following header In the table below the setup items are listed with their number and value range Header Description Format GDSDOO _ Sets or Gets a Setup the Instrument Master SO US Item No US Value US EOT Slave Sends nothing back Master S US No US EOT S

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