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Service Manual Cranex Dental Panoramic X-ray

1. 9 1 9 2 Connector Signals 9 2 9 3 Front panel board schematic diagram 9 3 9 4 Front panel board component layout 9 4 10 KV selectorpuu ea a ae 10 1 10 1 kV Selector 4120 1 functional description 10 1 10 2 kV Selector 4120 1 Automatic kV select 10 2 10 3 kV selector Connectors ecce iude decide ques ques Sn aleatorio needs 10 4 10 4 kV selector schematic diagram 1 10 5 10 5 kV selector schematic diagram 2 10 6 10 6 kV selector component layout 10 7 10 7 kV selector switches schematic diagram 10 9 10 8 kV selector switches component layout 10 10 Service Manual 8200909 V Contents Cranex Panoramic X ray Series 11 Tim Selector 4230 1 eret aneia aaiae kinai deira 11 1 a eta dasa 11 1 11 2 Time Selector 4230 1 functional description 11 1 11 3 Time selector schematic diagram
2. 11 5 11 4 Time selector component layout 11 6 11 5 Time selector switches schematic diagram 11 7 11 6 Time selector switches component layout 11 8 12 Power Switching Units I U UU men aia nona Gina RR 12 1 12 1 12 2 Filament Drive Circuit 47602 adosados uo ido nenna 12 1 12 3 Regulator TR4 12 1 12 4 Inverter TR2 TR3 47002 12 1 12 5 Protection CIFOBIE 12 2 1 2 6 1 uuu uuu u u uuu 12 2 12 7 Power Switching Unit PSU Connector Signals 47602 12 3 12 8 Power Switching Unit 47602 schematic diagram 12 5 12 9 Power Switching Unit 47602 component layout 12 6 12 10 OLD Power Switching unit PSU 47601 12 7 12 11 Power transistor verification 47601 12 10 12 12 Power switching unit connector signals 47601 12 11 12 13 OLD PSU 47601 schematic diagram sheet 1 12 13 12 14 OLD PSU 47601 schematic diagram sheet 2 12 14 12 15 OLD PSU 47601 component
3. 7 6 7 7 PSU Protection CIFCU C 7 7 1 8 Motor 7 8 7 9 Pulse Logic Unit connectors RR 7 9 iv Service Manual 8200909 Cranex Panoramic X ray Series Contents 2 10 PLU Schematic CIS Eel fi uuu u u u uuu uu uuu uu uu uuu 7 13 FIL PLU Component Layout u u eee 7 14 8 Partial Exposure Controller PEC u uuu 8 1 9 1 MEI 8 1 2 as 8 1 8 3 Eprom 27128 1 2 and Divider 4040 1 8 2 8 4 Mod selector e 8 3 B o MOOR DIVIN uu uuu 8 3 E D 8 3 NA Pul suis a 8 3 8 8 PEC COMO pam el LULU a Qu aliens itv oru 8 3 8 9 Lengths of exposured areas using the 8 4 8 10 Partial Exposure Controller PEC Connectors 8 5 8 11 Partial Exposure Controller PEC schematic diagram 8 7 8 12 Partial Exposure Controller PEC component layout 8 8 8 13 PEC Switches schematic diagram 8 14 PEC Switches componentlayoult 8 10 9 Front Panel board 4050 1 a aaa a 9 1 9 1 Functional Description
4. 4 Press the up down switch to check that the Z carriage moves up and down Replace the cover 20 10 Service Manual 8200909 Cranex Panoramic X ray Series 20 Testing Calibrating and Adjusting 20 7 Adjusting the up down speed z driver Excel and Excel Ceph units only The speed at which the Z carriage moves up and down can be adjusted There are two speed adjust ments Slow speed when the height adjusting key is initially pressed and high speed if the key is pressed and held down Adjust the speeds with the adjustment screws on the underside of the lower shelf VERTICAL SPEED ADJ vou oO SLOW FAST Lower shelf 20 8 Adjusting the volume of the exposure warning tone The volume of the buzzer can be adjusted with the trimmer T11 inside the rear bracket cover 20 9 Calibrating CCD sensors DM versions Service Manual 8200909 20 11 20 Testing Calibrating and Adjusting Cranex Panoramic X ray Series 1 Remove the cover from the PLU board and push the TA switch to the UP TEST position 2 Remove the cover from the 5 V power supply unit that is connected to the CCD sensor 3 Remove the covers from the CCD sensor 4 Connect a voltmeter across pin 13 and the metal body of the D connector 5 Place the radiation shield over the collimator 6 Take an exposure and adjust the trimmer in the power supply unit to get a voltage of 5 VDC 0 05 VDC 7 Replace all the covers
5. sss 21 4 The correct shape image 21 4 Image length correct but image not symmetrical 21 4 Image too long or too short Cassette versions only 21 5 The middle balls are not the same shape as the side balls 21 5 The shape of the balls are not the same on both sides 21 6 22 Replacing parts uuu uu asas nna nnn ana 22 1 22 1 Replacing the Mains Power Unit MPU 22 1 22 2 Replacing the Pulse Logic Unit PLU 22 1 22 3 Replacing the Partial Exposure Controller PEC 22 1 22 4 Replacing the Front panel board 22 2 22 5 Replacing the kV and Time Selector sss 22 2 22 6 Replacing the Power Switching Unit PSU 22 2 22 7 Replacing the Tube Head Assembly 22 3 22 8 Replacing the Cephalometric Tube Head 22 5 22 9 Replacing the Position Display Assembly 22 5 22 10 Replacing Z Driver Unit Board Excel units only 22 5 22 11 Replacing positioning light bu
6. Pe CHI 2 L 5 12 3 ms p Ji 4 J6 Cn MUR1560 ACHTUNG 450V Schaltung netzspannungsfuehrend Schutzisolierte Messinstrumente verwenden Power Switching Unit PSU 4801338 Service Manual 8200909 Cranex Panoramic X ray Series 12 Power Switching Units PSU 12 10 OLD Power Switching unit PSU 47601 Service Manual 8200909 The PSU includes high frequency power circuits and their drive circuits as well as a filament inverter The power transistor base drive circuits and filament inverter are located on the kV mA drive board attached to the PSU BFD voltage gives supply for drive signals Drive transistor T1 is controlled by 11 signal derived from the PLU D1 D2 D43 network prevent TR1 saturation making its transitions faster Transistor TR1 drives pulse transformer T1 Resistor R4 and capacitor C1 form current limiting and pulse shaping network Pulse transformer T1 isolates and makes the drive pulse bipolar 044 C16 R14 D51 D52 networks protect transistor against voltage spikes Power transistor on the secondary side of T1 is turned on when TR1 is turned off by low in T1 The other three drive circuits TR2 3 4 are identical to this Filament inverter power transistors TR6 and TR7 drive filament transformer in 20 kHz frequency through FP1 and FP2 FIV is constant voltage supply TR6 and TR7 are controlled through F1 and F2 derived from the PLU Networks D11 D 53
7. uito m E To Main wiring diagram rricioswtch cl s ad F ep h 2 11 1 Uy eo 1 0 2 PH recs eet 2 all versions eno C ew AW 5 8 sw GND eo 2 E z 2 E e 2 la a PLUG 7 a w PSU AN s 1 2 3 4 123 4 56 7 9 ho 1112 AV PARTIAL EXPOSURE 9 9 PSUS Ry 10 wl a CONTROLLER m STAR PULSE amp LOGIC UNIT ae n nic 2 e mieroswtich No 6 12 12 3 en PLU ps 13 18 A 14 14 T En m NC 2 ie pas aw 16 16 ew H q microswitch 7 1 Bn 16 16 EN w 17 17 AN 8 18 PEC SHECIOR 2 PRY m a Rn m 19 goa PE 2 20 1 SM 2 2 12 ER POWER _ 22 22 Ble BP SWITCHING 5 14 1 A MD1 0 UNIT C 4 24 24 15 b H m PSU 3 MD2 2 17 2 5 MIU MD2 PEC J2 18 PLIT PRY 1 19 PLU J2 PEC J Lit LI Mid m LH Ly y 20 m 2 3145 5 ab 78 9 no 1112 13 14 15 16 2 _ RFB 22 786 9 5 oa 122 13 1 14 28 en n PWNS PIJJ12 E 4 RL 10 _ s M FAILURE 9 mn 2 6 25 2 PSUS on FRONT RET al rem e 7 26 MD2 1 EPI 1 1 Fl 1 24 Jus a sis I n 2 nv 2 2 m 2 PANEL ABE KW Ed ERE 8 9 PSWJ7 3 E2 2 s m 3 PANG 5 SELECTOR 10 4 Hel 4 4 4 L wre RAMIC A d ay emn 2 CL 5 5 5 wl 5 H2 n 6 2 TUBEHEAD J2 Ji D2 13 INTERLOCK 7 RI 7 7 RI 7 n ud ues i REN ASSEMBLY
8. TIR 2 1 2 1 2 2 parts Excel Excel D BaseX and D 2 2 2 3 Main parts Excel Ceph 2 4 2 4 Mechanical description and operation 2 5 2 5 2 5 Rotating MOU C u l e 2 6 2 5 Circ it board MOG ON Lae 2 7 2 6 Which circuit board which version 2 9 2 7 El etrjeal operatio uuu sena eae 2 10 2 10 The Operating Principle the 2 10 High Voltage Section eee nee ico aito oo ne er 2 10 X ray Tube Current f 2 11 Automatic kV selection a nna enin nds 2 11 EXPOS US MES uu uu uuu AS 2 12 Service Manual 8200909 iii Contents Cranex Panoramic X ray Series 3 Main Wiring diagram S m 3 1 3 1 Sheet 1 cassette version T 3 1 3 2 Sheet 1 DM version eR mc 3 2 3 Sheet DS fIK d VEFSIOR u uuu dodo quiete uda Rome dte 3 3 3 4 Sheet 1 DS cassette verS Oon eneren nenene 3 4 39 5 Shet 2 all VEN SIONS ss 3 5 4 MicroswitcheS a aa a a 4 1
9. 2 oyde tt eoe TIAN J m Teo 83 or tol ct T ogus E AO 1 95 ral va ael oza t Ja 29 1 agit JL IM 3 u ANNIE DI usa v ru v eio 1 B Use maino A arat INANI Ta 100 33 T Ir INAN ms I 40123138 300 1 INIL za AGL ASI Q 4 unt d S u s uo 9 G v coI gt 4 Hd3O TRONG 0 d Su 1 UINA egoi z TTY dNNI S udeo vor 001 PLO HS ot eu 12 Xt cO L 1 B s onu 01 Ali Hams uod n po eid 18 Id AL DG Oz dente edt Kr SL z gt E i V Ava amnion SS Ural wnel Avot H axa T sr AX HL Bui upd duuigjainsodxe joo 40 vcd uos so LE To o ouueu How ecu a od INO Lisa o N 9 TA Rid O 0 0 7 deo 1 ONS r p 96 Iv ep E SOOPNL 210 138 935 b 15 OND z e 5 Ave NO PT I I Of 5 q O e c e eo N co 5 ia 9 7 Pulse Logic Unit PLU Cranex Panoramic X ray Series 7 11 PLU Component Layout SHADED COMPONENTS FOR CRANEX CEPHALUSTAT ONLY Z MOLEX CONN 2 P IN p C79 T Cat 7 EZ CONN 4 PIN T J4 MOLEX CONN10 PIN MOL EX M
10. H AX CABLE s 5 5 2 GND NC 2 n AXV CEPHALOI o U microswitch PARTIAL EXPOSURE HHC J5 JC2 CONTROLLER START PEC Microswitch PULSE amp LOGIC UNIT POWER SWITCHING UNIT HE BAC EPH l 14 PSU o PLU NC END lo g i A A A microswitch a d d Aul d d b A AA AV A AA PEC SELECTOR AA d d LEY YYYYYYYYYYYYYYYYYTYYYYYYYI 122222222 7222222 CEPHALO k PLUMA TH Ld ga microswitch b S A CEPHALO 4 TIME VA 5 ELECTOR fa 2 PIHA J1 A MD2 1 LIA bh 1 n UNE nun Hew w CRANEX 3 CEPH lt YY YY YYYY P d M E RAMIC Ve Tue HEAD 2N a 2 H ASSEMBLY ee iind Vet INANIS A PEN ya 00 9 samana man N Aa aey FRONT MA Ld PANEL M SN ytd CHANGER JA mou prb ye BIEN ens TEST IN SEY par 2 1 TEST OUT BEN JPIHA J2 p ep SEN ZR a nb 1 DEN pak s DEN Oa EE EL ES coc SN sh oe fd amy par ES I d SUN par SEN far ama t PTT TTT TTT TT ttt 1 sw Service Manual 8200909 3 Main wiring diagrams Cranex Panoramic X ray Series 3 2 Sheet 1 DM version ROTATION MOTOR I Add
11. N Nuni3u Nbz 3 Cranex Panoramic X ray Series 9 Front Panel board 4050 1 9 4 Front panel board component layout ide yw orn PE 1991 Vu LAVA aD sdadWf O 0 3115 439705 NO Front Panel 4801092 Service Manual 8200909 Cranex Panoramic X ray Series 10 kV selector 10 kV selector 10 1 kV Selector 4120 1 functional description Service Manual 8200909 The main function of the kV selector is to give a reference voltage to the X ray generator This refer ence voltage depends on which kV value is selected by the user So when the user presses one of the selector buttons on the kV selector card this one of eleven data is transferred to a 4 bit binary word by two 8 bit priority encoders IC3 amp IC4 This 4 bit word is latched IC5 and this latched data is then driving two 1 of 16 analog multiplexers demultiplexers IC1 amp IC2 First of them IC1 selects the LEDs on the selector buttons so that only one LED is burning at a time showing the selected kV value At the same time the other demultiplexer 1 2 gives to the kVref output J1 5 the right refer ence voltage value for the selected kV value from the voltage divider circuit resistors R10 R20 When the user selects TEST mode from the kV selector two things happens Firstly the kVref is switched to the O potential C2 and secondly transistor TR2 is turned off and transistor TR3
12. 6tOt pII Scd 228 A 7 gan S2 Ap eld Z glir J T N IG L AOT L AGT CTY Gu FASE CALE grief 8 I 29 8459 STH Z9 S NI JN 5 95 19 22 FU 6t IL B 91 13 elu LXI r 214 TH LOI 381 g4 Cs 512 CGeeD 83 9523 ata 900 6d 57 8E TT sq 8 I kI d Z driver unit 4800342 Service Manual 8200909 Cranex Panoramic X ray Series 16 PDC timing circuit for DM versions 16 PDC timing circuit for DM versions 16 1 Operation Service Manual 8200909 The purpose of the PDC Timing circuit is to galvani cally isolate the PDC cassette from the Cranex unit and to act as a timer for the PDC supply voltage PDC timing circuit is connected in series with the exposure signal Pressing the exposure button will activate relay K1 which will supply the operating voltage to PDC R6 and C4 initiate a two second delay of the exposure signal which gives the PDC electronics time to stabilize At same time counter IC3 starts to time the operat ing power to the sensor which must stay on for about 2 minutes The purpose of R5 R16 and C4 is to cause a time delay that is the same as the Cranex pre heat time When IC1 pin 8 goes high J3 pin 5 is pulled down the speed profile TDI file starts to be read which times the speed profile so that it is equal to the rotating s
13. 81 kV 2400 mAs h 81 kV 10 mA duty cycle 1 15 One normal exposure per 4 minutes cool down period CEPHALOMETRIC 81 kV 1800 mAs h 81 kV 10 mA duty cycle 1 20 One 3 2 s exposure per 1 minute cool down period Service Manual 8200909 25 3 25 Technical specifications Cranex Panoramic X ray Series Measurement bases The kV is measured by monitoring the current flowing through a 450 Mohm 1 feedback resistor connected between the tube anode and ground mA is measured by monitoring current in the HT return line which equals the tube current Both parameters are measured using a Soredex kV mA meter pt no 4800177 or with a digital multimeter DMM according to a specified procedure The exposure time is measured using a radiation probe positioned in the primary beam Cephalometric collimator 18 x 24 Aor 24 x 18 A for lateral projection 18 x 24 S for P A and A P projections 24 x 30 aperture optional 8 x 10 Aor 10 x 8 A for lateral projections 8 x 10 S for A P and P A projections Adjustable soft tissue filter for lateral projection Operating Room Temperature 15 C 59 F to 32 C 90 F Operating Relative Humidity Maximum 95 Storage transportation 0 50 0 85 RH 500 1080 mbar 25 4 Service Manual 8200909 Cranex Panoramic X ray Series 25 Technical specifications Tube housing assembly cooling characteristics TUBE HOUSING ASSEMBLY CO
14. Key Switch Cuts off AXV from Exposure Switch line F1 F2 slow main fuses FI1 RFI filter on back bracket Capacitor Board Filter signals going to remote control and exposure Switch MLS Patient positioning light trigger switch Service Manual 8200909 5 1 5 Capacitor Board Cranex Panoramic X ray Series 5 2 Service Manual 8200909 Cranex Panoramic X ray Series 6 Mains Power Unit MPU 6 Mains Power Unit MPU 6 1 General description 6 2 High Voltage Board 6 3 Low Voltage Board Service Manual 8200909 The Mains Power Unit MPU consists of a High Voltage Board and a Low Voltage Board Mains power is supplied to the MPU through 2 x 8 slow blow fuses and a two pole main switch Transformer T1 produces all the auxiliary voltages for the unit The mains power is fed to the High Voltage Board which supplies power to the power switching unit At the start of an exposure a PRV signal turns high and closes relays P1 P2 and P3 When P1 and P2 close they connect the mains power to filter network C1 CH1 C2 and through resistor R1 to rectifier D1 R1 limits the surge current when capacitor C4 is initially charged After the preheating time has elapsed the TH signal turns low closes relay R and allows C4 to be charged directly from the mains Capacitor C4 has a DC voltage of 230 300 VDC which is supplied to the PSU through fuses F3 and F4 in the form of PV and PV signals Transformer T1 supplies p
15. 6 Press and hold down the exposure switch and time the audible signal using a stopwatch 7 Proper exposure or audible signal should be 23 seconds 1 5 seconds 8 If the backup time is not correct it can be ad justed with potentiometer R26 on the PLU Service Manual 8200909 20 5 20 Testing Calibrating and Adjusting Cranex Panoramic X ray Series 20 4 Calibrating the Autoset kV cassette units only 1 Disconnect the cable that goes to the head support from J6 on the kV selector board 4120 2 4120 2 IC7 SOREDEX HTTP SLE 2 03 c2 HHHH H u SRR EEE BN was R44 L Dom mtm m ien Ic2 C1 r1 1 id hk R45 164 r1 IC3 Ct8 C8 cg X LIV cs 2 UC d LI i UU 4 8 S coca IPSE mrs RI C1 RA R6 2 Onthe kV selector board short pins 10 and 11 on IC 7 3 Make sure that the x ray unit is NOT in the READY position 4 Push the TA switch on the PLU board to the DOWN position and then adjust trimmer R43 4120 2 to set the kV value to 63 kV Note that the kV value will NOT change when you adjust the trimmer To check that the 63 kV has been selected push the TA switch to the UP position and check that the 63 kV light comes on If it does not push the TA switch to the DOWN posi tion again and readjust the trimmer 20 6 Service Manual 8200909 Cranex Panoramic X ray Series 5 Service Manual 8200909 20 Testi
16. 20 12 Service Manual 8200909 Cranex Panoramic X ray Series 20 Testing Calibrating and Adjusting 20 10 Calibrating CCD sensors DS versions For information on calibrating DS versions of the CCD sensor refer to the documentation supplied with the sensor Service Manual 8200909 20 13 20 Testing Calibrating and Adjusting Cranex Panoramic X ray Series 20 11 Checking the operation of PSU 47602 1 Checking the reference voltages Turn the power on and check the reference voltages 1 Switch the power on and check the following reference voltages with a DMM the 15V output voltage of IC 3 Use case of IC3 as GND and pin 8 on IC4 as output the 15V output voltage of IC 5 Use case of IC5 as GND and the top end of R16 as output the 15V between IC9 pin 14 and 1 Use top end of R27 as GND and the bottom end of R28 as output Power Switching Unit PSU Service Manual 8200909 20 14 Cranex Panoramic X ray Series 20 Testing Calibrating and Adjusting Power transistor verification This procedure will reveal faulty power transistors on the PSU Use a DMM in the diode range to get the correct readings Power Switching Unit PSU 0 TR3 us yc 1 TR6 s TR2 SO eo TR4 m 5 0 0 TR2 3 2 3 Black B B C E Red E B C 0 56 2 2 17
17. 4 1 Cassette carriage cassette carriage versions only 4 1 4 2 Rotating unit microswitches mr r 4 2 5 Capacitor Board Pr 3 1 6 Mains Power Unit MPU u a ua a en adi e 6 1 6 1 General description 6 1 6 2 High Voltage Board T 6 1 6 3 LOW 6 1 6 4 Connection box at rear of Z Carriage 6 2 6 5 Power Line Connection 6 3 6 6 Mains Power Unit Connectors 6 4 6 7 MPU schematic diagrarm U u u u u e 6 6 6 6 MPU Coripo ent LOyOHL uu u uuu u uuu E 6 7 6 9 Low voltage board schematic diagram 6 8 6 10 Low voltage board component layout 6 9 6 11 High voltage board componentlayout 6 10 7 Pulse Logic Unit PLU as E D xD LR KE Rr ni 7 1 Fe sies doce 7 1 7 4 7 3 Technique Selection PP 7 4 7 4 Filament Control Circuitry 7 4 7 5 Power Inverter Control o o o 7 5 7 6 High Voltage Control Circuitry 2 2
18. 47601 component layout 623 MII SAT neget seq ced O o9 WO bed 65 MET esee pese cO een 254 O b 1O924 4303u08 sensa Qu Iter e er rea fasenag 95 O O Zu 969 LO TI TT TI I 1 2250 91 51 q ANI Ord MIT 2 eE O O ced 7198 O asend 276 asena brer 6 72H88 Esera 61 0 d oza a 1 ctl MTT UCT 8 62248 8 6ccaa SAT gug MII AGT 12 15 Service Manual 8200909 12 Power Switching Units PSU Cranex Panoramic X ray Series 12 16 Service Manual 8200909 Cranex Panoramic X ray Series 13 Tube Head Assembly THA 13 Tube Head Assembly THA 13 1 Description Service Manual 8200909 THERE ARE NO SERVICEABLE PARTS INSIDE THE TUBE HOUSING ASSEMBLY THE OPENING OR REASSEMBLY OF THE TUBE HOUSING ASSEMBLY BY OTHER THAN SOREDEX IS PROHIBITED AND VOIDS THE WAR RANTY CERTIFICATION The panoramic and cephalometric tube heads are identical The tube head contains the high volta
19. 9 Front Panel board 4050 1 Cranex Panoramic X ray Series 9 2 Connector Signals The front panel connects directly to PLU J3 The pin numbers for that connector are given below Front panel board connects to PLU J3 Pin Signal 1 MAR 2 D2 7 24V 8 RETURN 9 FAIL L 10 RYL 11 GND Description 6 10 mA selection Low when 6 mA is selected high impedance when 10 mA is selected default Compensation selection Low when comp selected high impedance when not default Regulated 24V supply Return command High when return switch is pressed Protection indicator drive High 24 when unit is ready for exposure Ready LEDs drive High 24V when unit is ready for exposure Signal ground Jumper JP1 allows the default mA at start up to be set Connect pins 1 2 for 10 mA default Connect pins 2 3 for 6 mA default Service Manual 8200909 0 c oO c o LL 4801092 9 Front Panel board 4050 1 QNO wg B QNO ang oeg oz Bu at Eom oe 19015 1H yu 1770 34 2 1 xT 1163 9 NO ugat we nsi OTN ai q NOLLUOIONI QN9 M ate AQU3u NO119310Ud a 221 aJi rer 21 3389 N33H9 N3389 43349 TH NO 430 330 QN9 021 E 9 3 Front panel board schematic diagram Cranex Panoramic X ray Series e e uget NOILUSN3dHO2 zd E s er TNH T E 057 we c
20. Cranex Panoramic X ray Series 12 5 Protection Circuit 47602 The protection circuit monitors the inverter over current and regulator over voltage The comparator IC7 monitors current through inverter transistors and also the voltage across C13 Protection logic is performed by IC9 and the surrounding components In the event of over current tube arching or over voltage over 90kV occuring IC7 output will trigger opto isolator IC8 which in turn will trigger IC9 IC9 will shut down the regulator pulses through TR8 and inverter pulses through 1 It will raise the HFB signal to a value that will trigger the PLU protection circuit and then switch the protection light on D15 is the protection indicator for PSU protection To reset the protection circuit the unit must be switched off briefly 12 6 Transformer T1 47602 T1 is used to supply operating voltages to opto isolators and IC7 12 2 Service Manual 8200909 Cranex Panoramic X ray Series 12 Power Switching Units PSU 12 7 Power Switching Unit PSU Connector Signals 47602 PSU J3 Above panoramic tube head Pin T 3 2 4 6 5 7 8 10 12 11 Service Manual 8200909 Signal FP1 FP2 FIV HP1 HP2 HPI BI2 HFB PAN BV1 BV2 MAI PAN Description Filament transformer drive High 20 VDC 32 VAC during exposure Filament inverter supply High 20VDC during exposure High voltage transformer drive High 100VAC across after preheat
21. High voltage inverter supply High 120 190 VDC to PV after preheat Tube head temperature signal High 24VDC when unit is in start position and the tube head temperature sensor is closed or when the TA switch on the PLU board up High voltage feedback from panoramic tube head Tube head cooling FAN supply 24 VAC across Tube current feedback from panoramic tube head 12 Power Switching Units PSU Cranex Panoramic X ray Series 12 4 Service Manual 8200909 Cranex Panoramic X ray Series 12 Power Switching Units PSU 12 8 Power Switching Unit 47602 schematic diagram 15V 57 R2 R21C9 HP1 TRI ES TR J3 4 IRFD120 G 47R 11W u JR2 Na D2 7 E CH3 5 3 2 FIV A J3 3 FP2 D1 z z L 030 x J3 6 23 9 e S i a HCNW3120 HEZ J3 6 c3 03 11 4 47uF 450V J3 5 43 5 05 194005 1N4005 D6 D7 1N4005 1N4005 J7 9 eer MUR1560 470u 35V 220u 25V 1u 50V 47 15 ee i TRA VGST4 1 188 3 J 47 19 46 1 a lt 100u 35V J6 6 GND 470u 35V 220u 25V GND GND D IRF530N up m n ELI 1N4005 1N4005 GND 2 015 c16 ES e x is 1N4005 1N4005 IC8 MD2 100n 10n 2 PV 15V 632 8 100n C25 GND 10u 35V 12 gt 3 7 IC9 D 10k CD4001B R25 013 BYV95B H 11 RS
22. PECHS PEC J7 PLU J7 PLU J6 PEC J4 PECH6 HHC J1 Z7 wiring diagram quu sheet 2 all versions MAI GND MAI GND YY CYYYYYYIYYYIYYYYilYlllY BVI AA AA BD PLU J8 CN PARTIAL EXPOSURE CONTROLLER PULSE amp LOGIC UNIT PEC START microswiich q microswitch 1 q PLU AAA AKA AKA Ea SELECTOR PLUS LC Ld POWER La lt SWIICHING d b UNT 3 Ld lt Ld PSU Lg Le PEC J2 1 PLUJT a LY LLL LLL Ll LI L LL YYY YY YYYY PLU J2 GND AAA dd lud d rl A Ad AA TA A A b Gib EY i 4 18 AEN lt n FRONT AN 1 NR 2 1 N PF w e SUN I s q D PANO PS A Hd _ al sow HPI 5 19 sma vem oo ad SUN PDC LeL 8t 7 ASSEMBLY SEN w TMING m La bom 9N CIRCUIT B PANTHA PIHA MEN GND 9 _ 9 04 25 N TEST HN ono zle K encor lt EN h i 2 1 JPTHA J2 A A du AU A ABAAA AMA num hA J 2222222222 122122 Xo LAAAAAS POW JI rr YT PDC J1 FE POWER m K a ia SUPPLY z HE sami DAE ara 5V POWER 4 s 14 351012 p lt 3 2 Service Manual 820090
23. i eee C20L I 3850 BY229 8 FP z PU b 9 0 031 R35 J1 3 BITS e J 1 e gt 8 D32 0 di K A T 2 BY229 6 cD BYUS6E HPT D20 D21 euvesn 633 8 BYU95B 8 x 2 BYUSSB BYUSSB D amp 791 D22 D23 0830 1 T BY229 8 _ var S 7 Rn30 2 pee MES in cs D35 9 KI 1 EE HP2 _ J 6 I EE 78 2 T8 1 391 m CH2 1 2 2 56 2 m 47u R37 m C18L I i Az 2025 181 BAB ele ml TN Tiai T4 3 gt ole gt N o o m ON gt 47u 4 a L ln 25 rfc i 0 3850 lt a O m T4 2 14 4 Jai GND J21 291 CNY17 II jai 2 1 Service Manual 8200909 12 13 12 Power Switching Units PSU Cranex Panoramic X ray Series 12 14 OLD PSU 47601 schematic diagram sheet 2 _ 18 PRU 17 J2 2 ux 25 MD2 d dc 72 12 oa 23 MD1 _ J6 o J2 11 Em J6 EEG J2 10 15 ear J2 9 BI1 _ 10 _ BI2 a i HFB 14 jorii TH 19 _ ve 20 J23 J6 ORD J24 J6 oo wu 6 JS E RLU 32 5 J2 jg 1 RYL J2 8 _ 1 _ JZ I M FP2 2 oS FIU a m JO J3 1 1 2 1001 l j 12 14 Service Manual 8200909 12 Power Switching Units PSU Cranex Panoramic X ray Series 12 15 OLD PSU
24. or change if necessary Faulty film processing Make sure that the film processing system is working correctly and that the processing chemicals are correct fresh and at the right temperatures 18 Troubleshooting Cranex Panoramic X ray Series 3c Incorrect kV 3s Check the generator calibration 4c Darkroom is not light tight or the wrong lamp is being used with the safelight 4s Check that there are no light leaks the darkroom Do this by placing a on a piece of unexposed film placed on a flat surface in the darkroom After five minutes process the film If an image of the coin appears on the film it indicates that the darkroom is not light tight If there is no image on the film the lamp is correct for the safelight The image is not symmetrical 1c The column is not vertical which is causing the rotating unit to change speed during exposures 1s Reposition the column to get the unit in to the vertical position There are dark vertical lines over exposure on the film 1c The cassette carriage bearing block is dirty or loose 1c Clean or adjust the bearing block 2c The cassette carriage roller is dirty 2c Clean cassette carriage roller with alcohol 3c The cassette carriage roller is worn 3c Replace cassette carriage roller 4c The cassette motor drive wheel does not touch the cassette roller 4c Adjust the cassette motor drive wheel so that it touches the cassette roller 5c rotation drive gear
25. schematic diagram D5 KI nie 144005 1 11 J1 J1 3172 n J1 J1 J1 7146 MDI J1 53 50Hz 60Hz J1 EKS 5 223 B eu 1 rem J1 HD2 150 4 5 8 8 8 8 1 gg CHPH ONK 1N4148 J2 TO PLU C8 SOCKET PIN Service Manual 8200909 DS lt 144905 1612 7885 EPROM 2764 27128 27256 GERD DOV DIV D2V D3V D4V DS V DEV AL4 7PGM D V 4040 16 8 27128 28 _ 14 IC3 4017 16 8 EXT N gt NORM PAN CHILD PAN TMJ 1 TMJ2 LEFT PRN RIGHT PRN Partial exposure controller 4801008 J8 TO PEC CONTROL BOARD CAS ROT 8 Partial Exposure Controller PEC 8 Partial Exposure Controller PEC Cranex Panoramic X ray Series 8 12 Partial Exposure Controller PEC component layout RL2 Y nie S2 24UDC o gr 1 S2 24UDC leis C23 m Ri c11 Da SW S SS SWI yO Ban Es ey EH 4066 EPROM28 2764 27128 27256 22542 Partial Exposure Controller 4801008 Service Manual Cranex Panoramic X ray Series 8 Partial Exposure Controller PEC 8 13 PEC Switches schematic diagram Oo 2 J Service Manual 8200909 8 9 8 Partial Exposure Controller PEC Cranex Panoramic X ray Series 8 14 PEC Switches component layout wm wm N Tf Q N Nx SWS 0F0 dN IH ZG TG D gt J WSedITLA
26. BCE TR4 5 67 IR4 5 Black G D 5 G G 0 56 25 3 25 3 TR 6 7 Black G G GDS Red S G D 0 2 0 2 0 75 Service Manual 8200909 20 15 20 Testing Calibrating and Adjusting Cranex Panoramic X ray Series Checking the wave forms 1 Switch the power on 2 Disconnect J2 J3 on MPU a Take an exposure and verify the filament inverter pulse wave form from TR6 and TR7 drain against GND Memory 2 56 4 Name Memory 2 Date 13 3 2003 46 4 Time 8 36 27 Y Scale 10 V Div 364 E YAt5O 154V XScale 10 ys Div XAtO 20 ys m XSie 512 Maximum 555V v 184 Minimum 0 4 6 4 3 6 13 6 23 6 10 ps Div FILAMENT INVERTER TRE TR drain against GND fig 1 20 16 Service Manual 8200909 Cranex Panoramic X ray Series 20 Testing Calibrating and Adjusting b Check inverter control pulses IC1 pin3 and IC2 pin3 Memory 3 26 4 Memory 3 Date 13 3 2003 21 4 Time 84531 YScae 5 V Div 16 4 YAt5 O 64 XScale 20 ys Div 114 40 ys Size 512 Maximum 11 6 v 54 Minimum 4 1 4 3 6 86 13 6 20 ps Div FILAMENT INVERTER DRIVE PULSES IC1 AND IC2 pins3 fig 2 c Check inverter pulses at gates of TR2 and TR3 against PV PV is floating GND Memory 4 26 4 Memory 4 Date 13 3 2003 21 4 Time 3 32 34 YScale 5 V Div 16 4 VYAtsO 64V x Scale 20 XAtOZ us WA XSize 512 Maximum 13 4 V 54 Minimum 0 2 14 3 6 8 6 13 6 20 ps Div I
27. DOWN SWITCH CEPH L o m H J SS I 3 EN 3 MARK LIGHT UP DOWN 2 b SWITCH 1 K a US d D ZMOTOR 5 UNIT d A D MLS nies BPC J2 ZDUAM Service Manual 8200909 3 Main wiring diagrams 1 2 3 4 5 6 MAINS POWER UNIT 12 MPU 11 10 9 8 7 MPU J5 MPU J4 HHC J2 7 HHC JA 1 23 4 2 EN 4 5 6 7 9 1112 3 s 2 z E 8 HHC J1 HHC J3 PSU J2 Q To Main wiring diagrams Sheets 1 3 Main wiring diagrams Cranex Panoramic X ray Series 3 6 Service Manual 8200909 Cranex Panoramic X ray Series 4 Microswitches 4 Microswitches 4 1 Cassette carriage cassette carriage versions only START POSITION gt CAS INSIDE Cassette carriage microswitches viewed from the tube head Cassette CAS microswitch connects to PLU J9 Pin Signal Description 4 NO Closed when cassette is in start position Enables ready condition 5 C Film FILM microswitch connects to PLU J9 Pin Signal Description 1 NO Closed when cassette carriage is in start and stop positions film beginning and end Controls radiation on and off Stops exposure normally 3 NC Cephalo CEPH microswitch connected to PLU J9 Pin Signal Description 6 C Open when cassette carriage is in CEPH position Stops cassette carriage movement when unit is moving to CEPH po
28. Div fig 9 7 Make an exposure and measure regulator volt age across C13 63kV 10mA approximately 145V 81kV 10mA approximately 180V Service Manual 8200909 20 21 20 Testing Calibrating and Adjusting Cranex Panoramic X ray Series 20 22 Service Manual 8200909 Cranex Panoramic X ray Series 21 Aligning procedures 21 Aligning procedures The procedures in this section describe how to identify and correct operating and image quality problems 21 1 Taking a ball pin exposure The first step towards correcting image quality and or operating problems is to take a ball pin exposure From the size and shape of the balls and pins on the image alignment and operating problems can be identified and then corrected Taking a ball pin exposure 1 Slide the ball pin fixture in the lower shelf Ball pin fixture Chin rest support 2 Switch the positioning lights on and position the focal trough light beam so that it is on the middle of the two front balls Focal trough light Front balls Y Light beam Ball pin fixture Service Manual 8200909 21 1 21 Aligning procedures Refer to the documentation supplied with DfW software Refer to the documentation supplied with the imaging software Cranex Panoramic X ray Series Cassette versions 3 Insert into the cassette carriage a cassette loaded with film and its sheet of backing paper the film must be placed on t
29. PEC SELECTOR r Pw PLUS TH POWER SWIICHING UNIT PSU La LTYYYYYIYIl PEC J2 LAA dud d Pd bd vlr dA d AAA d AA AA AUTOSET kv CCD SENSOR L a 2 y bp BEN LY Y Y Y Y Y Y Y Y Y TY Y Y BE JJ PLU J3 2 15v AN A b I 3 PSUS A fa U lt BEN P B b was SN te Rom ET D sn ow SUN 219 B use EIN ia 7 ET IE C mam gt BEN sms eee E 17 A SN a EM a AA Ei PEC J2 SEN 4 AN Ha H ar AN PA t a AEN um JPTHA J2 ap KR 2 A K AS As T R A A E PE A IN A SN A EN A 2 A JA AAA CDR REMOTE CONIROL BOX LT POWER SUPPLY PCI CARD 3 4 Service Manual 8200909 Cranex Panoramic X ray Series 3 5 Sheet 2 all versions EXPOSURE LAMP UNIT EXL J1 MPU J1 L 1 GND L 9 2 JM 4 3 EXL 4 EXP PH 5 RYL pEr 12 220VAC Pt POSITION d u 220VAC BPC J3 DISPLAY PT T js a ali RYL I u2 aL BPC JI di AXV L 8 12 EXCEL 2 De l LL L EXPOSURE BACK OS SWITCH PANEL d CONNCTOR O N 220V ML J2 G 3 BUZZER MAINS SWITCH BE NM 7 1 ONLY UDS J2 i j f i UP
30. R13 or when relay P3 closed At the beginning of an exposure the PRV signal goes high and triggers relays P1 and 2 and close the contacts that they control The PRV signal also triggers relay P3 which opens two and closes one of the contacts it controls The R9 C9 D11 D12 network produces a pull out delay for relays ensur ing that no power is going through P1 and 2 contacts when disconnected 6 4 Connection box at rear of Z Carriage The mains power is connected through the mains input terminal radio interference filter and 2 x 8A slow main fuses to a double pole mains switch The connection box also includes a RFI capacitor board that filters AXV EXP EXL GND signals using 4 7 nF capacitors Service Manual 8200909 Cranex Panoramic X ray Series 6 Mains Power Unit MPU 6 5 Power Line Connection The unit can be used with line voltages ranging from 175 to 250 volts The factory setting is 220 volts between 205 225 V 1 With a digital volt meter DVM check the line voltage to which the unit is to be connected Also check the earth connection and the circuit breaker If the line voltage is not the same as the factory setting the voltage of the unit must be changed 2 change the voltage of the unit move the wire marked L on the transformer terminal block to the terminal with the line voltages to be used The line voltage ranges for the terminals are as follows LINE VOLTAGES TERMINAL 1
31. Regulated supply 24 VDC PLU J6 Cassette motor where applicable Pin 1 2 3 Signal Description Cassette motor supply High 24 VAC to 2 during return movement when TA switch is down Cassette motor supply Cassette motor supply High 24VAC to 2 after preheat when TA switch is down Service Manual 8200909 Cranex Panoramic X ray Series PLU J7 Rotation motor Pin 1 2 3 Signal 7 Pulse Logic Unit PLU Description Rotation motor supply High 24 VAC to 2 after preheat when TA switch is down Rotation motor supply Rotation motor supply High 24 VAC to 2 during return movement when TA switch is down PLU J8 Rotation microswitches Pin Signal Description Exposure command High 28 35 VDC when exposure switch pressed Exposure command High 28 35 VDC when exposure switch pressed and rotation unit not in end position Notin use Rotation start position High 24 VDC when rotation unit in start position Regulated supply 24 VDC Rotation unit position in Ceph mode Open across when rotation unit in Ceph position PLU J9 Cassette carriage microswitches cassette versions Pin 1 2 3 4 5 6 7 Service Manual 8200909 Signal Description Signal ground Radiation enable signal High 15 VDC after preheat when film comes behind secondary slot Motors start signal High 15 VDC after preheat Cassette start supply High 24 VDC when rotation unit is
32. Z motor belt No radiation when exposure taken movement but no lights 1c 1s 2c 2s 3c 3s 5c 5s Fuses F3 and F4 on MPU have blown Replace fuses Make sure that they are the correct rating 6 3 AFF very fast Also check the regulator and inverter transistors on the PSU Tube head malfunctioning Replace the tube head Circuit breaker on MPU has tripped Reset the circuit breaker CB1 If it trips repeatedly R1 on MPU High Voltage Board has blown Replace R1 or the High Voltage Board Connector pins are damaged or have been pushed out of the connector Check all cables and connectors Replace if they cannot be repaired None of the lights come on 1c 1s 2 2s 3c 3s Fuse F6 has blown Replace fuse AXV 28 VDC shorted to ground Check wiring for shorts to ground Exposure switch shorted to ground Replace exposure switch Service Manual 8200909 18 5 18 Troubleshooting Cranex Panoramic X ray Series 4c 4s Voltage regulators or other circuits on the PLU Partial Exposure Controller PEC Position Display Z Driver Unit or PDC Timing Circuit DM version only arr short circuiting Replace defective board Rotating unit and or cassette carriage do not move during exposure 1c 1s 2c 2s Fuse F6 blown Replace fuse Motor s malfunctioning Replace motor s Exposure apparently normal but no image produced 1c 1s No mA Check the FIV line fuse F5 and the transist
33. ZAS TAS O 8 10 Service Manual 8200909 Cranex Panoramic X ray Series 9 Front Panel board 4050 1 9 Front Panel board 4050 1 9 1 Functional Description Service Manual 8200909 The main function of front panel board is to support toggle type switches compensation off on and mA 10 or 6 There are also located return switch and unit state indicating LEDs ready and protection When power is switched on the RC network C7 and R6 resets IC1 so outputs Q in pin 1 and pin 13 are low This puts the system into the default state the default can be set by repositioning jumper JP1 LEDs D6 and D8 on indicating that compensation is off and selected tube current is 10 mA TR1 and TR2 are off When the user pushes SW1 the IC1 is clocked pin 3 goes high and changes its state to 1 so Q pin 1 goes high led D6 off TR1 on and Q pin 2 goes low which switches LED D7 on com pensation on When user push SW1 again the state returns back to default D6 on TR1 off D7 off SW2 controls mA level same way IC2 is used to sharpen the clock signal R2 R3 C5 and R4 R5 C6 are needed to get switch open level signal level shift and filtration IC3 regulates 15V power needed by CMOS logic IC1 and IC2 SW3 is return switch and it is connected to PLU logic D1 D4 are indicating that unit is ready for exposure controlled by RYL signal from PLU D5 is protection circuit activation indicator controlled by FAIL L signal from PLU
34. after automatic select of kV The automatic kV value can always be changed manually if required select a new kV value during the Ready mode before exposure After the exposure the automatic kV select is ready again Service Manual 8200909 10 3 10 kV selector Cranex Panoramic X ray Series 10 3 kV selector Connectors kV selector J1 goes to PLU J12 a 5 Signal Description GND 24 V test 1 out test 1 in kV ref N C 15 V test 2 N C Q N 10 4 Service Manual 8200909 Cranex Panoramic X ray Series 10 4 kV selector schematic diagram 1 H en e oko Iro R 4k75 4k75 Service Manual 8200909 T T BZX84C15 10 kV selector E MENTRI TEST2 BCB57 J2 5 J2 8 oko j 41 5 R42 17k8 R32 R33 R34 15V R41 kV Selector 4801380 sheet1 10 kV selector Cranex Panoramic X ray Series 10 5 kV selector schematic diagram 2 15V 5 cen 15V A IC10 100nF 2 J4 1 nya 3 V X c 270nF M SE SOV INTR_CAP ES R43 43 2 ZERO ADJ1 3 4 6 gt Ss z Bes ZERO ADJ2 0 IN HIGH IN LOW 3 GAIN ADJ 845 HOLD BYPASS CA3162 TEST2 5 CEPH READY 28 C3 15 kV Selector T 4801380 Sheet2 C15 C16 C17 10 6 Service Manual 8200909 10 kV selector Cranex Panoramic X ray Series 10 6 kV selector co
35. bottom cover from the lower shelf of the z carriage and removing the connectors The vertical move ment speed adjustment procedure must be com pleted after replacement See section 20 Testing Calibrating and Adjusting Adjusting the up down speed z driver Service Manual 8200909 22 5 22 Replacing parts Cranex Panoramic X ray Series 22 11 Replacing positioning light bulbs 1 Switch the power off 2 Pry the front cover off of the light with a small screwdriver NOTE Handle the light insert carefully so that Positioning light the position of apertures do not move Front cover ssp 3 Remove the blown light bulb and insert the the new bulb into the bulb holder 4 Switch the power on Make sure that light insert is not grounded by the metal covers Switch on the positioning lights 5 Rotate the bulb in its holder until the light is the brightest and sharpest 6 Slide the front cover back onto the light 22 6 Service Manual 8200909 Cranex Panoramic X ray Series 22 Replacing parts 22 12 Replacing the Focal Trough Cable 1 Loosen wheel holding axle 5 Over left pos hand wheel m d 8 4 Under lefi hand wheel 6 Route wire through the connection bar stud 2 Attach to stud nearest to column I 3 Over top of roller round 1 times exit from bottom Service Manual 8200909 22 7 22 Replacing parts Cranex Panoramic X ra
36. control High 28 35 VDC during exposure 3 TH R relay control Low after preheat 4 GND Signal ground 5 RVL Not used Relay Voltage Full wave rectified 20 VAC 6 FIV Filament inverter supply Regulated High 20VDC during exposure 7 AXV Unregulated supply 28 35 VDC 8 RYL Not used Ready light drive High 24 VDC when unit is ready for exposure 9 EXP Exposure command High 28 35 VDC when exposure switch pressed 10 EXL Exposure light drive High 24 VDC when kV over 50 11 12 MD1 MD2 Supply for drive motors PSU and low voltage supply 24 VAC across MPU J5 In front of MPU Pin Signal Description 1 2 BV1 BV2 Supply for tube head cooling fan 24 VDC 3 4 PV PV Supply for power switching unit High 230 300 VDC across during exposure Service Manual 8200909 6 5 Cranex Panoramic X ray Series 6 Mains Power Unit MPU 6 7 MPU schematic diagram off 2021 829 f QN9 oet ettas 110 Uf gr Sif amr ust ELN esse Utt f uer wit staal Zd A0001 e 0 2 020 oy 0220 3 9 9 2 6 OL SIT mm 18 La Mains Power Unit MPU Service Manual 8200909 Cranex Panoramic X ray Series 6 Mains Power Unit MPU 6 8 MPU Component Layout p E J AJ n 1 k 7 7 LER low voltage Service Manual 8200909 6 7 6 Mains Power Unit MPU Cranex Pan
37. digital versions of the unit use the dental imaging software being used to examine the image Service Manual 8200909 21 3 21 Aligning procedures Cranex Panoramic X ray Series 21 2 Analysing the ball pin image The correct shape image If the unit is set up aligned and operating correctly the distance between the two outermost pins of the ball and pin image will be between 260 270 mm In addition the distances from the middle pin to the left and right outermost pins will be equal withinn 3mm and between 130 135 mm The balls will also be round and not oval 260 270 130 135 130 135 D Middle pin IOI IOIOIOIOIOIOI IOI IOI Image length correct but image not symmetrical If the length of the image is correct but the two sides of the image are not the same length the image is not symmetrical it indicates that the unit is not verti cal Not symmetrical y mm y mm Middle pin Middle pin I 101 IOI 101 IOIOIOIOIOIO IOI IOI IO I L IOI IO IO IOIOIOIOIOIOI IOI IO IOI I To adjust the unit so that it is vertical see Adjusting the symmetry of the image in the Installation Manual 21 4 Service Manual 8200909 Cranex Panoramic X ray Series 21 Aligning procedures Image too long or too short Cassette versions only If the image is too long above 270 mm or too short below 260 mm it indicates that the cassette car riage is moving either too fast or too slow T
38. exposure when a low voltage is supplied to pin 6 on IC7 The protection light will then come on When the EXPOSURE switch is pressed a high voltage is produced on pin 13 on J1 Because the END microswitch is closed in the ready state a high voltage is also produced on pin 5 IC7 This produces a low voltage on pin 4 IC9 Pin 6 IC9 has a high voltage because of the ready condition This produces a low voltage on pin 13 IC8 Before exposure starts a high voltage is produced on pin 10 IC9 and a low voltage on pin 8 IC9 This produces a high voltage on pin 12 IC9 which in turn produces a low voltage on pin 12 IC8 Thus a high voltage is produced on pin 11 IC8 PRE signal When the PRE signal voltage goes high preheating begins If a kV value has been selected the unit is not in the TEST mode pin 14 IC4 produces a low voltage If a kV value is selected instead of TEST TR1 will come on and produce a high voltage PRV signal that activates the P relays on the MPU If the show switch connection to the MPU is cut the show switch is down for the show mode the PRV signal is not transmitted to the MPU and the P relays are disabled Capacitor C4 begins to charge through R9 and when pin 12 IC2 reaches the voltage level of pin 13 IC2 approximately 9 volts the voltage of pin 14 IC2 goes up Now the voltage of pin 16 IC3 goes low which closes the M relay and the drive motors are energized with digital units software handl
39. have both four keys and third has three Timing controller s scanning TTL logic level signals KEY SCNO KEY SCN1 and KEY SCN2 are made open collector with transistors TR1 TR2 and TR3 Keyboard columns are pulled up and con nected directly to Timing controller s pins 15 19 A pressed key grounds one key column signal When a valid key only one key is active at a time is found then internal status is changed new exposure time is written to internal timer and a LED is switched on the 11 1 11 Time selector Cranex Panoramic X ray Series operating panel If the key pressed was a cephalo exposure time signal is active then signal CEPH_ON is activated logic high LEDs are connected to 24 with series current limiting resistors R3 and R4 and are driven with darlington transistors 1 2 and IC3 Only one LED is on at a time Transistors TR4 to TR7 converts logic levels TR4 and TR5 from 15V to 5V and transistors TR6 and TR7 from 5V to 15V Test point TP5 is connected to Timing controller s internal timer and toggles between 0V and 5V after every 10ms only during exposure TIME1 high and TIME2 low A logic high level on signal TIME 1 starts the timing sequence The internal timer is started and 100Hz square wave signal appears to TP5 When selected time is reached TIME OUT signal goes high ena bling logic high level on signal TIME2 which termi nates the exposure by triggering the backup timer on pulse and logic board L
40. is turned on When TR2 is off no X rays are produced during exposure on TEST mode As TR3 is turned on the TEST2 line J1 8 will rise near 15 volts During exposure the TEST1IN line is near zero volts preventing the change of kV value by dragging the El line down IC4 pin 5 After power has been turned on the R2 C2 circuit will RESET the circuit and selecting the 71kV value automatically The other RC circuit R1 amp C1 gives a necessary delay to the CLK signal IC5 pin 9 of the data latches Physically the circuit is divided in two circuit boards one containing the switches with in build LEDs and the other with the rest of the circuit 10 kV selector Cranex Panoramic X ray Series 10 2 kV Selector 4120 1 Automatic kV select Note The automatic kV select is only used with the Excel Excel Excel D BaseX and BaseX D It is not used with the Cranex 3 3 Ceph 2 5 or C Measuring the patient s head The head support has a built in potentiometer that measures the patient s head when the temple sup ports are closed A signal from the potentiometer goes to the kV selector which then selects the kV Automatic selection of the kV to be used Measurement of the size of the patients head is given to the kV selector This voltage is connected to A D converter IC 7 pin 11 This circuit has adjust ments for zero relative 0 and gain The result of this measurement 1 given in a four bit digital BCD word fro
41. layout 12 15 13 Tube Head Assembly THA 13 1 Ree einai TT 13 1 pepe retia 13 2 14 Position Display Board saa 14 1 14 1 The Position Display 14 1 14 2 Position Display Connector Signals 14 2 14 3 Position display schematic 14 3 14 4 Position display component layout 14 4 Service Manual 8200909 Cranex Panoramic X ray Series Contents 15 2 UNIS a e a 15 1 15 1 Speed Reference Circuit 15 1 15 2 Moset Output 15 1 15 3 OM Step p Circuit er TT CEU 15 1 15 4 G rrentiLimiti rr 15 2 15 5 Patientipositioning lighis aeu qnie quai een dui Side n 15 2 15 6 Z Driver Unit Connector Signals 15 2 15 7 Z driver schematic diagram 15 3 15 8 Z driV r component lay Out u uu u uu u u uuu 15 4 16 PDC timing circuit for DM versions 1 16 1 ma UT 16 1 16 2 PDC timing circuit connector signals 16 2 16 3 PDC timing circuit DM schemat
42. or indirectly arising from the use of its prod ucts No agent distributor or other party is author ized to make any warranty or other liability on behalf of Soredex with respect to its products Service Manual 8200909 Cranex Panoramic X ray Series 2 Unit description 2 Unit description 2 1 Versions Service Manual 8200909 Excel Ceph The Excel Ceph is a dental panoramic x ray unit that uses film or Soredex imaging plates as the imaging media It can take panoramic reduced width pano ramic sinus and TMJ exposures In addition Sym metric Vertical SV Asymmetric Vertical AV and Horizontal H exposures to be taken with the cepha lometric unit The Excel Ceph has three patient positioning lights midsagittal frankfort focal trough a focal trough position indicator and motorized height adjustment Excel Similar to the Excel Ceph but does not have the cephalometric unit BaseX Similar to the Excel but can only take panoramic reduced width panoramic and sinus exposures In addition it only has two positioning lights frankfort and focal trough does not have a focal trough posi tion indicator and the height adjustment is manual Excel D Similar to the Excel but uses a CCD sensor as the imaging media BaseX D Similar to the BaseX but uses a CCD sensor as the imaging media Cranex This is a cephalometric only unit and takes Symmet ric Vertical SV Asymmetric Vertical AV and Hori zontal H exposu
43. or replacing any parts or circuit boards All recognised safety proce dures should be followed including power off 22 1 Replacing the Mains Power Unit MPU The MPU is removed by removing the screws one in each corner The connectors should be removed by pressing the release buttons and pulling apart The ground wires should also be removed Reinstallation is performed by reversing this procedure After the MPU has been installed the following pro cedure MUST be carried out a Check the power line connection b kV mA calibration procedure 22 2 Replacing the Pulse Logic Unit PLU The connectors should be removed from the circuit board after removal of the four nut pins that hold it in place Caution is advised in the replacement of covers to prevent jamming of selector switches and pinching of wires After the PLU has been installed the following proce dure MUST be carried out a kV mA calibration procedure b Backup timer confirmation 22 3 Replacing the Partial Exposure Controller PEC Service Manual 8200909 The exposure controller can be removed by de tached the control panel opening the connectors and finger nuts If the controller is broken it could be temporarily taken off when IC10 in the PEC is trans ferred to the IC8 socket in the PLU and the motor connectors are connected to the PLU The functions of the PEC procedure must be checked after re placement 22 Replacing parts Cranex Panoramic X r
44. the angle at which the drive wheel touches the cassette carriage roller This is accomplished with a cam and follower mechanism 2 6 Service Manual 8200909 Cranex Panoramic X ray Series 2 Unit description 2 5 Circuit board location PDC timing circuit DM versions only Dr s Interlock circuit DS versions only eee M kV Selector 4 S HC Time Selector Ceph versions only Pulse amp Logic board PLU Lae Partial exposure control Front panel board Receptor side of rotating unit Ceph tube head changer Excel Ceph only Tube head assembly THA I I f Tube head side of rotating unit Cooling fan Service Manual 8200909 2 7 2 Unit description Cranex Panoramic X ray Series High Voltage Board Mains Power Unit MPU Low Voltage Board High Voltage Board Low Voltage Board Mains Power Unit MPU Upper shelf Lower shelf Excel Excel D and Excel Ceph ONLY Position Z driver Unit 2 8 Service Manual 8200909 Cranex Panoramic X ray Series 2 6 Which circuit board which version 2 Unit description cy LO 26 56 5 x x gt Ber Circuit Board 8 D D 5 noar 05 d9d ja o Mains Power Unit MPU Yes Yes Yes Yes Yes
45. the cassette drive shaft Casssette carnage roller Casssette carriage Selection knob W BaseX onl 0 y Casssette carriage end left 4 Insert the new cassette carriage roller 5 Replace the cassette carriage end If the unit is a BaseX also replace the selection knob Service Manual 8200909 22 11 22 Replacing parts Cranex Panoramic X ray Series 22 15 Replacing the CCD sensor DM version 1 Remove the upper cover and the control panel cover from the rotating unit Control panel cover 2 Disconnect the cable from the side of the CCD sensor and then remove the sensor It is held in place with four 4 screws CCD sensor M version 3 Installthe new CCD sensor reconnect the cable and then replace the covers 4 Calibrate the new CCD sensor and then check the beam alignment Refer to the DM installation appendix 22 12 Service Manual 8200909 Cranex Panoramic X ray Series 22 Replacing parts 22 16 Replacing the CCD sensor DS version 1 Remove the upper cover from the rotating unit 2 Disconnect the cable that goes to the CCD sensor from the remote module Cable from CCD sensor Remote n remote module Module CCD sensor Service Manual 8200909 22 13 22 Replacing parts Cranex Panoramic X ray Series 3 Remove the lower left hand cover and then the 4 Disconnect the trigger cable from the CCD sen sor and then remove the CCD
46. these points will move in relation to the film and will appear blurred Since the difference between the speed of the film and the speed of the of the points in the object will increase with the distance from the sharply 24 Theory of operation Cranex Panoramic X ray Series depicted object plane the unsharpness increases in both directions from this plane At some distance the unsharpness will reach a level where an object point is no longer perceptible in the image In this way a zone in the object may be defined which contains those object points which are depicted with sufficient resolution that they may be distinguished This zone is referred to as the image layer Preferably the layer thickness in rotational panoramic radiography should be great enough that the whole depth of the jaws which in themselves constitute a layer would be sharply depicted in the image In practice this condition is never realized Especially in the anterior region of continuous images the layer is so narrow that the positioning of the patient is critical Unsharpness in this region lowering the diagnostic information is a frequent experience in clinical work with rotational panoramic radiography Thus while the unsharpness may be disturbing it is usually not great enough to conceal large object details However it may happen that a malpositioned tooth may be difficult or impossible to detect in the image if it is positioned toward the rotation cent
47. up produc ing high voltage on pin 13 IC8 and a low voltage pin 12 IC8 This causes the voltage PRE signal on pin 11 IC8 to go down turning off X ray generation Further exposure is possible only after the unit is returned to the ready position again and the voltage on pin 6 IC7 goes up 7 Pulse Logic Unit PLU Cranex Panoramic X ray Series 7 2 Return Function When the RETURN switch is pressed the voltage on pin 9 IC5 goes up and if the voltage on pin 8 IC5 is high a high voltage is produced on pin 10 IC5 which with the help of D4 holds itself at the high level When the voltage at pin 10 IC5 is at a high level it drives the D and M relays The D relays change rotating direction of motors to re turn The voltage at pin 8 IC5 goes down when the EXP switch is pressed pin 8 IC8 goes high or when the rotating unit reaches start position and START microswitch closes pin 9 IC8 goes high 7 3 Technique Selection Technique selection is done with the kV selector row The kV selector generates a selected refer ence voltage to kV REF output When TEST mode is selected TEST 1 contact is low inhibiting P relay pull in and TEST 2 contact is high connect ing high to IC8 pin 1 that prevents the EXT NOT signal from going low 7 4 Filament Control Circuitry IC14 produces pulse width controlled 23 5 kHz drive signals to the filament inverter transistors on the PSU through FIL1 and FIL2 IC14 has two sep
48. upper shelf houses the mains power unit that supplies power to the X ray generator 2 Unit description Cranex Panoramic X ray Series Rotating unit not Cranex C The rotating unit is attached to the underside of the upper shelf It comprises a tube head and a cassette carriage with digital units a CCD sensor During an exposure the rotating unit rotates around the pa tient s head in the horizontal plane The tube head generates the x ray beam which is collimated by the primary slit The radiation passes through the patient to the secondary slot Behind the secondary slot the x ray beam strikes the film imaging plate cassette which is synchronized to move linearly as the rotating unit rotates with digital units a CCD sensor is used Acam mechanism also slides the rotating unit back wards and forwards along the x axis as the rotating unit rotates This x axis movement allows the x ray beam to follow the shape of the jaw more accurately and avoids x ray concentration at the stationary rotation center During rotation the speed of the cassette carriage varies in relation to other movements with digital units the speed profile TDI file of the CCD sensor determines the virtual movement This movement determines the imaging layer focal trough Basic synchronization of the drive motor and the cassette drive motor is done electrically The two AC motors run at the same speed The speed of the cassette carriage is adjusted by changing
49. 02 The PSU 47602 includes high frequency power circuits and their drive circuits as well as a filament inverter 12 2 Filament Drive Circuit 47602 Filament inverter transistors Fet TR6 TR7 drive the filament transformer at a frequency of 23 5 kHz Drive signal pulse width for TR6 and TR7 is control led by the PLU board 12 3 Regulator TR4 TR5 47602 The regulator controls the voltage across C13 The voltage is then fed to the tube head by the power inverter The MPU supplies rectified and filtered line voltage PV PV PV is fed through TR4 and TR5 to C13 Regulator transistors TR4 and TR5 control through CH2 the voltage across C13 The regulator is controlled by the PLU using pulse width modulation The drive pulse is formed by connecting drive signals R1 and R2 in parallel on PSU board This pulse is fed to IC9 then to TR8 and then to opto driver IC4 The opto driver IC4 controls TR4 and TR5 The opto driver IC4 also provides galvanic isolation between the low and high voltage circuits 12 4 Inverter TR2 TR3 47602 Service Manual 8200909 The inverter works in a push pull mode using a 90 duty cycle and transfers the regulator voltage to the tube head The PLU controls the inverter using drive signals 11 12 which are fed to opto isolators 1 1 and IC2 which are drive inverter transistors TR2 TR3 TR2 and TR3 which control the high voltage transformer in the push pull mode 12 Power Switching Units PSU
50. 19 J3 11 0 TH TCMP PB7ZSCK 6 8 15 J3 11 2 7 10 7 TR4 HC68HC705PS 1 J3 L 1 6 TIME1 BC337 is 1 13 4 TIME_OUT 19 J2 1 2 8 u IC3 2 19H 8 232 12 6 IC3 GND GND GND GND SI 1e 2 208 L_3 2 SHORT JP1 IF CRANEX C 15U 45U 50 10k lt a gt cc 00 240 50 GND 4 IC3 9 TOMO_ON 7 101 18 4 is 13 4 214 1 R3 TRS 28 14 gt 51333 TOMO ONK J5 120k BC337 8 s C3 C4 ICS 150 8 2 2 ONY 98 180n a 4 4 GND GND GND GND IC3 3 S TOM BC327 RN3 4 J1 CEPH ON 240 0 150 188n 100 GND GND J1 TIME2 Service Manual 8200909 11 5 EM 68HCYSPS 11 Time selector Cranex Panoramic X ray Series 11 4 Time selector component layout J4 5 134148 144148 D2 O TP1 x ICS N Time selector 4801011 11 6 Service Manual 8200909 11 Time selector 11 5 Time selector switches schematic diagram Cranex Panoramic X ray Series XZN9SA3DI XINOSA3 I XDONOSA3 NOHHO2 1 rA 92 1 027 1 9 1 1 T 1 8 071 ENI A334 zr 9 071 NI A33 zr 5 01 TINI A33 ef 0 1 ONI A3 f Ned 1 TS 71351 Service Manual 8200909 Cranex Panoramic X ray Series 11 Time selector 11 6 Time selector switches component layout Service Manual 8200909 11 8 Cranex Panoramic X ray Series 12 Power Switching Units PSU 12 Power Switching Units 12 1 PSU 476
51. 2 with C4 s charge and discharge cycle Switch S1 bypasses IC3 so that the generator can be calibrated without the DS program CDR Pan Block Diagram CDR Pan Remote Module Video Amplifier A D converter Control Pixel decoder Clocking System Control Host computer Service Manual 8200909 17 1 17 Interlock circuit board DS versions Cranex Panoramic X ray Series 17 2 Interlock circuit board connector signals Interlock J1 26 pin ribbon cable 11 12 13 14 15 16 17 18 19 20 23 26 Signal MAI GND RVL BI1 RI1 RYL BI2 EXP HFB EXL PRV TH MD1 MD2 Description Tube current feedback from panoramic tube head Signal ground Unregulated supply 28 35 VDC Not in use Full wave rectified 20 VAC Tube head temperature signal High 24 VDC when unit in start position kV selected and tube head temperature sensor closed or TA switch on PLU board up and tube head temperature sensor closed Ready light drive High 24 VDC when unit ready for exposure Tube head temperature sensor supply High when unit in start position and kV selected or TA switch on PLU board up Exposure command High 28 35 VDC when exposure switch pressed High voltage feedback from pan tube head Exposure light drive High 24 VDC when kV over 50 P relay control High 28 35 VDC during exposure R relay control Low after preheat Supply for drive motors 24 VAC
52. 3 rises IC1 pin 9 becomes high the SLOW signal gets low and the FAST signal high and voltage Vref is formed by R11 R12 and R13 When the UP DOWN switch is pushed voltage Vref is grounded through capacitor C4 This supplies full power to the motor for about 50 ms to get the motor running 15 2 Moset Output Stage 15 3 6V Step up Circuit Service Manual 8200909 The output stage is controlled by the REV signal and buffers IC3 and IC4 and by pulse width modulator IC2 When the motor runs forwards REV signal high transistors T3 and T4 are off T2 is on and transistor T5 is switching with the same duty cycle as pulse width modulator IC2 When the motor runs backwards REV signal low transistors T2 and T5 are off T3 is on and transis tor T4 is switching Transistors T2 and T3 use 36V gate voltage The voltage is produced by diodes D4 D5 and capaci tors C9 C10 When the motor is running IC2 pin 10 switches between OV and 12V The voltage across capacitor C9 is 24V The voltage at the anode of diode D5 varies between 24V and 36V and the voltage capacitor C10 is 36V 15 Z Driver Unit 15 4 Current Limit Cranex Panoramic X ray Series Current through the output stage is measured with resistor R7 Voltage across R7 should be less than the current reference voltage at IC2 pin 15 When the current increases voltage at IC2 pin 16 in creases If voltage at IC2 16 reaches the volt age at IC2 pin 15 motor contr
53. 4 AC supply derived from the MPU MD2 is brought through a TA switch contact that disables motors when in the up position M relay controls supply to motors through contacts in both MD1 and MD2 line D relay controls direction of motor run by connecting MD1 signal either to J6 1 and J7 3 J6 3 and J7 1 J4 8 and J4 9 are shorted together with a jumper on connector Service Manual 8200909 Cranex Panoramic X ray Series 7 Pulse Logic Unit PLU 7 9 Pulse Logic Unit connectors PLU J1 26 pin ribbon cable 11 12 13 14 15 16 17 18 19 20 23 26 Signal MAI GND AXV RVL BI1 RI1 RYL BI2 EXP HFB EXL PRV TH MD1 MD2 Description Tube current feedback from panoramic tube head Signal ground Unregulated supply 28 35 VDC Not in use Full wave rectified 20 VAC Tube head temperature signal High 24 VDC when unit in start position kV selected and tube head temperature sensor closed or TA switch on PLU board up and tube head temperature sensor closed Ready light drive High 24 VDC when unit ready for exposure Tube head temperature sensor supply High when unit in start position and kV selected or TA switch on PLU board up Exposure command High 28 35 VDC when exposure switch pressed High voltage feedback from pan tube head Exposure light drive High 24 VDC when kV over 50 P relay control High 28 35 VDC during exposure R relay control Low after preheat Supply for
54. 75 190V usethe 190 V terminal 190 205 V use the 200 V terminal 205 225 V use the 220 V terminal 225 250 V use the 240 V terminal IMPORTANT NOTE If the mains resistance is significant the input voltage will drop below the required level when an exposure is taken In this case select a terminal one step lower to ensure proper opera tion Transformer Terminal block Service Manual 8200909 6 3 6 Mains Power Unit MPU Cranex Panoramic X ray Series 6 6 Mains Power Unit Connectors MPU J1 At back of MPU Pin Signal Description 1 GND Ground 2 JM Not used Unregulated supply 30 VDC for Z magnetic brake in older Cranex models 3 EXL Exposure light High 24 V when kV over 50 4 EXP Exposure command High 28 35 VDC when exposure switch pressed 5 RYL Not used Ready light High 24VDC when unit is ready 6 AXV Unregulated supply 28 35 VDC 7 8 Positioning light supply High 12 VDC across whenpositioning lights triggered on 9 Positioning light trigger High 28 35 VDC when light trigger switch 10 Unregulated supply for positioning light trigger Low during exposure 11 12 220 VAC input mains voltage Present when the unit is switched on 6 4 Service Manual 8200909 Cranex Panoramic X ray Series 6 Mains Power Unit MPU MPU J4 In front of MPU Pin Signal Description 1 BFD Not used Unregulated supply for PSU High 20 30 VDC during exposure 2 PRV P relay
55. 9 Cranex Panoramic X ray Series 3 Main wiring diagrams 3 3 Sheet 1 DS fixed version PEZ woh dL A A Service Manual 8200909 Ic T T DUE psg TT T J T PLU PECJJA PECIU6 PEC J5 PEC J7 NC D
56. C EARTH LEAKAGE CIRCUIT BREAKER when required Approved type min 16 250 VAC breaker activation leakage current in accordance with local regulations Mechanical parameters PANORAMIC SID 520 mm 10 mm Magnification factor 1 3 CEPHALOMETRIC SID 1635 1700 mm 20 mm SID USA only fixed 1700 mm 20 mm SOD Source object distance 1500 Magnification factor 1 09 1 13 Non US unit set during installation Magnification factor USA only fixed 1 13 WEIGHT Panoramic unit 150 kg 330 Ib Pan Ceph unit 195 kg 430 Ib DIMENSIONS Panoramic unit HxWxD 2240 x 1200 x 970 mm 88 x 47 x 38 Pan Ceph unit HxWxD 2240 x 1200 x 1850 mm 88 x 47 x 74 VERTICAL HEIGHT OF CHIN REST 850 1700 mm 33 67 Cassettes PANORAMIC 15 x 30 cm 6 x 12 Optional 24 x 30 cm 10 x 12 available CEPHALOMETRIC 18 x 24 cm 8 x 10 optionally 24 x 30 cm 25 2 Service Manual 8200909 Cranex Panoramic X ray Series 25 Technical specifications Timer PANORAMIC EXPOSURE TIMES 50 Hz 60 Hz Normal 19s 15 16 15 Child 17 s 15 14 15 Sides 11 s 15 9 15 Middle 10 s 15 8 s 15 TMJ 3 3 3 3 s 15 2 8 2 8 5 15 Max 240 mAs Max 202 mAs CEPHALOMETRIC EXPOSURE TIMES 0 4 3 2 s 15 ten steps in accordance with R 10 series ISO 4 mAs 32 mAs nominal maximum 40 4 mAs BACK UP TIME 23 5 1 55 Leakage technique factors PANORAMIC
57. Cranex Panoramic X ray Series 14 Position Display Board 14 Position Display Board 14 1 The Position Display Service Manual 8200909 The position display board is located inside the lower shelf It includes a slide potentiometer A D con verter display driver and two seven segment dis plays The potentiometer is connected to the focal trough light support bracket The potentiometer supplies input voltage to the A D converter IC2 pin 11 is dependent on focal trough light adjustment A D converters voltage difference in pins 10 and 11 to 3 digit BCD output digit selection being on pins 3 4 and 5 and BCD code on 1 2 15 and 16 When IC2 outputs a digit to display it also outputs the corre sponding BCD code BCD code is connected to IC3 to be converted to a seven segment display drive signal A zero reading is adjusted with R9 Gain of conver sion is adjusted with R10 Supply voltage for the board is derived from AXV R1 D1 TR1 regulate the supply to 10 volts which is connected to a 5 volts regulator IC1 Capacitors C6 7 8 9 reduce noise produced by IC3 14 Position Display Board Cranex Panoramic X ray Series 14 2 Position Display Connector Signals PD J9 At lower shelf Pin Signal Description 1 AXV Unregulated supply 28 35 VDC 2 GND Signal ground 14 2 Service Manual 8200909 14 Position Display Board Cranex Panoramic X ray Series 14 3 Position display schematic diagram 991 ELE ddjo4ddd388u SI
58. D54 and D12 D40 D50 prevent transistor saturation making switching faster Networks D13 C6 R22 and P14 C7 R23 protect transistors in turn off state and diodes D56 and D57 make opposite path for inverter current The power section of the unit has two sections the power regulator section and power inverter section C10 is the output capacitor of the power regulator and feeds the power inverter 12 Power Switching Units PSU Cranex Panoramic X ray Series The power regulator is supplied with rectified and filtered mains through PV and PV Capacitor C20 filters the supply input CH1 R46 D19 network forms turn on protection for switching transistors TR8 and TR7 work in parallel and are driven by pulse transformer T2 through antisaturation network D15 D17 D18 Diode D16 improves transistors turn off Resistors R26 and R27 balance current through the transistors The other pair of transistors TR10 and TR11 are identical and the two pairs are driven at 20 kHz in push pull mode to increase the power handling capability of the section C9 D24 R30 network protects transistor pairs in turn off CH2 and C10 form an LC network that filters switched square wave voltage across flywheel diode D25 When transistor pairs are driven on current flows along the path PV CH1 TR8 9 CH2 C10 PV or PV CH1 TR10 11 CH2 CH10 PV and when driven off the current will continue because of i
59. M393 generates RESET to timing controller whenever 5V drops under 4V Timing controller can operate from 3 3V to 5V The panoramic exposure mode is always disabled in the Cranex C by setting TIME2 high irrespective of whether the exposure key is pressed or not JMP1 UNIT Shorted Cranex C Open Excel or BaseX Service Manual 8200909 Cranex Panoramic X ray Series 11 Time selector Time selector J1 goes to PLU J13 Pin Signal Description GND Signal and power ground TIME1 TIME2 CEPH_ON 24V DC 15V DC O N Service Manual 8200909 11 3 11 Time selector Cranex Panoramic X ray Series 11 4 Service Manual 8200909 Cranex Panoramic X ray Series 11 Time selector 11 3 Time selector schematic diagram Time Selector 4801011 R9 ik5 TP1 TP2 5U E 1 GND 3 IC5 TR1 1 KEYSCN J2 1N4148 nl og 424U 7 CIT zE KEYSCNix J2 IC1 Ata cole D 1 2 SN Er KEYSCN2x J2 2 TIME_IN RESET osc E 3 IRQ UPP 0862 Es 4MHz TERRA al at KEY SCNO 22 18 i 21 9 GND J4 L_COHMON KEY_SCN2 26 8 T 6 E E C KEY_INO 1 J6 5 MA i KEY INI 18 6 E KEY IN2 2 3 KE INZ 17 PCSVANI 2 185 5 14 qs 1 l1 16 4 KEY IN3 J2 M 18 1 PCB RNO E PC URH 1S J4 L 0 6 5U IC2 TEM 21 PORT B 1 _ 1_8 L PDS PBS SDO HH e E s gt PD7 TCRP PBG SDI H
60. NVERTER PLILSES and gate against tig 3 Service Manual 8200909 20 17 20 Testing Calibrating and Adjusting Cranex Panoramic X ray Series d Check regulator pulses IC4 pin3 against GND Memory 5 25 4 Name Memory 5 Date 13 3 2003 21 4 Time 8 55 15 5 5 V Div 16 4 YAO 54V XScale 20 ys Div 114 0 40 ys X Size 512 Maximum 14 0 v 54 Minimum 0 0 1 4 35 8 6 13 6 20 ps Div REGULATOR PULSES IC4 PINS against GND e Check regulator pulses at gates of TR4 and TR5 against source Memory 6 26 4 Name Date 21 4 Time Y Scale 16 4 Y At 50 x Scale DXAt02Z 11 4 XSize Maximum 54 Minimum 14 3 6 8 6 13 6 20 ps Div REGULATOR PULSES TR4 and gate against source go Memory 5 13 3 2003 8 58 02 5 V Div BAY 20 ys Div 40 us 512 134 02v 20 18 Service Manual 8200909 Cranex Panoramic X ray Series 20 Testing Calibrating and Adjusting 3 Check protection circuit operation Press the exposure button and short IC8 pins 4 and 5 LED15 must light up and exposure must terminate Switch power off for 20 seconds and switch it back on Check IC7 reference voltages pin3 1 6V and pin 5 5 4 Connect J2 J3 on MPU Select 63kV 10mA take an exposure and check the current wave form for tube head from J3 5 HPI with a current probe Memory 8 24 2 Memory 8 Date 26 3 2003 192 Time 11 00 43 Sca
61. OLEX MOLEX CONN 7PIN si IN XT J3 MOLEX CONN 11 PIN B 1x50M Pi 1 C1 10u Ce 10u C3 10 u Z Z Be 56R 0 75W B Z a PKV gt H Di RL4 CKV jx EE LL Ce MZ 2 TIMER LOW Z B By X 25 16 RELAY 2A CKV H R55 82 Q6 35 184005 PKV lk 2k 2 A 1 Rota QD Rate Je 3M FLAT B 20 M E INV 26 I S R69 1508 x R70 1508 1 J1 3M FLAT B 26M eo 26 R79 10k C18 470n 646 1M VU V V IC3 IC4 5710 ICG 1 13 114 3403 3403 2004 2004 IET TL 494 TL 494 TL 494 3403 N 5 Ea eeu R60 474 104735 4081 H 8 Gy Eel S 2 e R m BINE Sle C22 10 n T iru 8 IC17 gt CI az LICIS 3 4013 10u 35V gt N 466 3308 CE w p 87 TCI z 15 33 ICD Gs f REE w 4066 LR 83 R65 R45 R41 R51 R56 sa 2k Sk 100k 1k 20 k Wz 7 EA 4011 4001 4013 24 eem Z 240 J9 5 PIN A MOLEX Co in 47 L 11 4200 CONN 5 PIN A m PCBUARD 4100059 4100 MULEX B bi9F MOLEX B 1 X6F side i Pulse amp Logic Board 4001 solder ng side 4100 4200 Service Manual 8200909 Cranex Panoramic X ray Series 8 Partial Exposure Controller PEC 8 Partial Exposure Controller PEC 8 1 Block diagram PARTIAL EXPOSURE CONTROLLER ROTATION MOTO
62. OLING CHARACTERISTICS kHU HEAT UNITS 8 74 ram is 30 60 90 120 150 180 TIME IN MINUTES Service Manual 8200909 25 5 25 Technical specifications Cranex Panoramic X ray Series Tube rating chart Anode thermal characteristics 105 mA 20 18 SSG 16 Tian 14 5 89 PH I 12 90 00 E 10H To E II E 6 j HH o L 8 4 1 2 2 0 1 0 05 01 020305 1 2 3 5 10 20 0 Tube rating chart Anode thermal characteristics DE 100 15 TUBE LOADING CHART ANODE COOLING CHARACTERISTICS kHU 80kV TILL 5 11 1520 TIME IN SECONDS s ANODE CURRENT ANODE HEAT UNITS TIME IN MINUTES 25 6 Service Manual 8200909 Cranex Panoramic X ray Series Unit dimensions 2200 88 2170 20 86 1 406 16 150 GE 1200 47 o OQ N c m m e e nr Uu 25 Technical specifications 970 38 1850 73 Service Manual 8200909 25 7 25 Technical specifications Cranex Panoramic X ray Series 25 8 Service Manual 8200909
63. PN 5 i 1 L 1 _ 8 8 8 BI 8 RV KA 2 GND GND 2 9 PANTHA PTHA lt 16 2 eb oe 3 7 9 EN HPN o A o 9 De PWS Fe 11 eo om 8 RET 9 Test 3 i 5 pn AS 5 E 10 m w g ho m ROUT GND 2 19 6 ND esp 10 n 11 Yi MAPAN e A24 M 20 7 AN AN H n 12 B2 12 12 V2 PECAD ms i A 12 CH a m 5 I EB cn my m D j rama jet an Bl 10 4 VFn PE a gt 12 456 7 8 9 o 1112 13 14 nja n 15 JPIHA J2 ROBE zle 6 9 5 lola mis 1212 12 P 12 16 di 9 prs 4 1 4 z we B12 18 17 ule 28 F 18 al gt M Low HP FAN ER EL 15 19 FI 16 m 16 AD ao Por 17 17 DNE rer a 18 Att 119 AUTOSET kv CCD SENSOR l 25 2 2 22 2 2 a w B 23 A A 1 24 25 CL 2 M02 25 2 2 26 9 e CDR REMOTE LO CONTROL BOX POWER SUPPLY PCI CARD 3 Main wiring diagrams Cranex Panoramic X ray Series 3 4 Sheet 1 DS cassette version 14 3 AAS PLU JA PLU PLUS PEC J4 PEC J6 PEC J5 PEC J7 UK A To Main wiring diagram EEE LL Sheet 2 all versions MAI PLUTO GNO ab PEC GND AX GND PLU J8 PSU J1 a 3 PARTIAL EXPOSURE CONTROLLER PEC 7 PULSE amp LOGIC UNIT PLU EXP HP EXL p PRY
64. R PULSE AND LOGIC UNIT o O E 2 O PSU CASSETTE MOTOR Block diagram of the PEC 8 2 Operation The main parts of the partial exposure controller are a 12 bit divider 4040 IC1 EPROM 27128 IC2 and push buttons which are selecting the exposure method The timing pulse is produced from AC volt age MD1 J1 pin 23 24 which is in line frequency 50 60 Hz Divider makes an 11 bit address for EPROM IC2 All the 6 partial exposure methods are stored in EPROM IC2 When the partial pro gram is selected the PEC board drives signals PRE PLU IC8 pin 11 and EXT PLU IC7 pin 13 in the PLU board through IC 8 socket and also drives motors with relays RL1 and RL2 in the PEC PRE and EXT signals control irradiation in the pulse and logic unit During normal exposure PEC has no effect on the actions of the PLU and motors when normal is selected Both 15 and 5 DC voltages are used because of the EPROM They are produced from AXV connection J1 6 7 8 by regulators IC11 15V and IC12 5V Service Manual 8200909 8 1 8 Partial Exposure Controller PEC Cranex Panoramic X ray Series 8 3 Eprom 27128 IC2 and Divider 4040 IC1 When a partial program is selected one of the data bits of the EPROM IC2 0 1 2 4 or 5 is con nected to drive PRE signal Bit no 3 drives EXT signal of the PLU board and preheating of filament When the EXPOSURE button is pressed the state of PEC J2 14 chan
65. S 4k7 e vro dE CD4001B x 14 15V 2 7 GND 1N4005 IRFD120 HFB TTT FIV GND D16 Power Switching Unit PSU 4801338 FIV AXV AXV 1 IE e S R24 GND Service Manual 8200909 12 5 12 Power Switching Units PSU Cranex Panoramic X ray Series 12 9 Power Switching Unit 47602 component layout Q CAU high voltage 450V floating ground TION O SOREDEX 47602 1 2 10u 35V ES Ci 28 cy ug 929299 g 623 8 478 114 S PEL C IXGH24N60A z TRS R8 E B TRI CH4 1 en 8 In 6n8 100V 2 ca 2422 2 5 E 100n 250 100n 250V EB E Had RB pi SE Teves z FIOR IGHA4NGOA R25 R26 CH3 1 380R R24 L390R a 8 les R wn cn S CHS gt IN um MURISEO CH3 2 n 2 ma mw J3 2 03 1 cag n 1 ARAW d No meow T e 38 2 3 3 SOREDEX 5 2 47602 dg o 2 EEE JR2 3 RI 1 cb E 43 4 O Cu 920 43 7 4 Da J3 8 RES 10 1 A 192009 D12 A TLE CH2 1 J4 1 ptt T R36 08 03 11 qe c 8 C8 C12 6n8 1000V 1094009 05 T 1610 D4 Quo tu 50V T 06 E IC4 a T 10 R12 CH2 2 CHI CH2 CHI 1
66. S 95491 PAN al l 82 99 69 29 3291589 3191559 T 9 NIH MOT 3 19 af HOIH lt q 2 lt g g 05 I9 20 ASN ves Siz 0TH ASF NSt TETdIL nxa T vul Position display 4510 Service Manual 8200909 Cranex Panoramic X ray Series 14 Position Display Board 14 4 Position display component layout Position display BAT v3 V gor 82 62 Be U HO JB Old td 523 0181 6H Seer lt q 231 zu 911 S13Z8 13 C200 T Service Manual 8200909 14 4 Cranex Panoramic X ray Series 15 Z Driver Unit 15 Z Driver Unit 15 1 Speed Reference Circuit The speed reference circuit IC1 NAND controls the motor drive circuit 1 2 pulse width modulator with two signals SHUT signal IC2 pin 4 enables the motor drive when low Vref signal IC2 pin 1 determines duty cycle of IC2 the lower voltage Vref the higher the duty cycle of IC2 is and the faster the motor runs When the UP DOWN switch is pushed either the REV or the FW signal is grounded low and the START signal become high Therefore the SHUT signal becomes low which activates the motor drive IC2 At the same time IC1 pin 8 gets high but pin 9 remains low due to The SLOW signal is now high and the FAST signal low Voltage Vref is now formed by R8 R9 and R10 After the voltage across capacitor C
67. Service Manual for the Cranex Dental Panoramic X ray Series Excel Excel Ceph Excel D BaseX and BaseX D This manual can also be used to service the Cranex 3 Ceph 3 2 5 and C Medical Device Directive 93 42 EEC October 2003 Document number 8200909 ver 0310 Original approved English language version Manufactured by SOREDEX P O BOX 250 FIN 00031 SOREDEX FINLAND Tel 358 10 394 820 358 9 701 5261 Contents Cranex Panoramic X ray Series ii Service Manual 8200909 Cranex Panoramic X ray Series Contents Contents Dea To EUN 1 1 1 1 Scope 1 1 1 2 Associated documentation a asss 1 2 1 3 Servicing warnings and precautions 1 2 General precautions T 1 2 Radiation Safety METTE ike izi 1 2 Mechanical safety uuu 1 3 Electrical 1 3 Electrostatic discharge RR l U ll lll u a 1 3 Explosion Hazard siescicvesancienaesasiersaidcess was oJ MAD ON ap aper Cad UR RUM ERES 1 4 Operating warnings and precautions 1 4 Unauthorized Modifications 1 5 1 6 ps 1 6 2 Unit
68. Yes High Voltage Board Yes Yes Yes Yes Yes Yes Low Voltage Board Yes Yes Yes Yes Yes Yes Power Switching Unit PSU Yes Yes Yes Yes Yes Yes Tubehead Exchanger Yes Z Drive Unit Yes Yes Yes Yes Position Display Yes Yes Yes Pulse Logic Board PLU Yes Yes Yes Yes Yes Yes kV Selector Assembly Yes Yes Yes Yes Yes Yes Time Selector Assembly Yes Yes Partial Exposure Controller PEC Yes Yes Yes Yes Front Panel Board Yes Yes Yes Yes Yes PDC Timing Circuit DM vers only Yes Yes OR Interlock Circuit Board DS vers only Yes Yes Service Manual 8200909 2 9 2 Unit description Cranex Panoramic X ray Series 2 7 Electrical operation General description The unit has a high frequency switching mode X ray generator consisting of five units The mains power unit MPU located in the upper shelf of the Z car riage the power switching unit PSU the pulse and logic unit PLU the partial exposure controller PEC and the tube head THA located in the rotat ing unit The Operating Principle of the Generator The generator is fed by a single phase 220 VAC line Auxiliary voltages are produced by a 50 60 Hz trans former rectifying and filtering networks All auxiliary voltages are grounded High Voltage Section The mains input is rectified and filtered and then fed to the high frequency generator This supply is con nected to the power switc
69. across Interlock J2 20 pin ribbon cable Pin 1 2 3 4 9 13 15 17 19 16 18 14 20 Signal RFB 15 F1 F2 F V R1 R2 I1 12 Description Signal ground Regulator voltage feedback Regulated supply 15V Filament inverter control High 1 2 VDC 0 2 VAC during exposure Filament inverter supply High 20 VDC during exposure Power regulator control High 2 2 DC during preheat low 1 5 DC after preheat Power inverter control 1 5 DC 0 3 VAC during exposure Service Manual 8200909 Cranex Panoramic X ray Series 17 Interlock circuit board DS versions Pin Signal 1 TP2 Interlock J3 Pin Signal 1 2 Service Manual 8200909 Description Ready signal Description Trigger signal Ground 17 Interlock circuit board DS versions Cranex Panoramic X ray Series 17 4 Service Manual 8200909 Cranex Panoramic X ray Series 17 3 Interlock circuit board DS schematic diagram 1 12 42 12 J1 13 42 15 1 14 32 14 1 15 J2 15 1 16 J2 16 J1 17 42 17 1 18 J2 18 1 19 42 19 1 20 42 20 21 42 21 1 22 72 22 Service Manual 8200909 1 0 01 144005 17 Interlock circuit board for DS vers A INL e D S 2 TR4 IRFD9120 S C4 cI 10n 4u7 83V 35V 12 10 m Interlock 4801361 17 Interlock circuit board DS versions Cranex Panoramic X ray Series 17 4 Interlock ci
70. ament inverter supply High 20 VDC during exposure 4 6 HP 1 High voltage transformer drive High HP2 100 VAC across after preheat Floating 5 HPI High voltage inverter supply High 120 190 VDC to PV after preheat Floating 7 Tube head temperature signal High 24 VDC when unit in start position kV selected and tube head temperature sensor closed or TA switch on PLU board up and tube head temperature sensor closed 8 BI2 Tube head temperature sensor supply High 24 VDC when unit in start position kV selected or TA switch on PLU board up 9 HFB High voltage feedback from PAN panoramic tube head 10 12 Tube head cooling fan supply 110 BV1 BV2 VAC across Floating potential 11 MAI Tube current feedback from PAN panoramic tube head Service Manual 8200909 12 11 12 Power Switching Units PSU Cranex Panoramic X ray Series 12 12 Service Manual 8200909 Cranex Panoramic X ray Series 12 Power Switching Units PSU 12 13 OLD PSU 47601 schematic diagram sheet 1 Jai tp DL J81 NYS y m 0 SFA BYUS6E R46 BY229 6 0 ini b IZR ay mom 216 D15 11H 3 a BUYESR amp n BYUSSB TRES M it 11 4 ab bs Je1 4 BUvESn CH1 1 CH1 2 PU 9 J3 4 T2 4 D1 47u oS BE
71. amic X ray Series Image quality problems Ceph units The margins are not all the same width 1 beam is out of alignment 1s Check and if necessary adjust the beam alignment Refer to the installation manual 2c The earrings are not concentric 2s Adjust the position of the ear posts to get the ear rings concentric 3c The soft tissue filter does not move 3s Replace the soft tissue adjustment screw 18 10 Service Manual 8200909 Cranex Panoramic X ray Series 19 Removing covers 19 Removing covers Most of the unit covers are held in place with Torx screws screwdriver is supplied with every unit Be careful when removing covers as many have ground wire connected to them NOTE When replacing covers ALWAYS reconnect the ground wires NOTE When replacing covers ALWAYS replace grounding washers in their original positions 19 1 Rotating unit 1 The upper cover on the control panel side of the rotating unit is held in place with four 4 screws two on the top and two on the side Note that you may have to turn the rotating unit to access the top two screws The control panel is held in place with three 3 screws These cannot be accessed until the upper cover has been removed Control panel screws 3 Upper cover Rotating unit Control panel cover Service Manual 8200909 19 1 19 Removing covers Cranex Panoramic X ray Series 2 The upper cover on the tube head side of the
72. anex Panoramic X ray Series Press and hold down the exposure switch and adjust R41 PRE until the DMM reading is 1 5V 1 6V 40 kHz old tube heads with serial numbers beginning with 12xxxxx and 22xxxxx 1 2 1 3V 47kHz old tube heads with serial numbers beginning with 12xxxxx and 22xxxxx 2 55 2 65V 47kHz new tube heads with serial numbers beginning with 13xxxxx and 23xxxxx Push the PRE switch to the right to the ON normal position Press and hold down the exposure switch and adjust R52 mA until the DMM reading is 2 8V 10mA Connect the DMM across TPs CKV and onthe PLU 11 Check the voltage levels for the different kV selections according to following table 63kV 5 72 T3kV 6 62V 65kV 5 90V T5kV 6 80V 67kV 6 08V 77KV 6 98V 69kV 6 26 T9kV 7 16V 71 6 44V 81 7 34V Service Manual 8200909 Cranex Panoramic X ray Series 20 Testing Calibrating and Adjusting 20 2 Adjusting the low line triggering 1 Rotate trimpot R16 on the PLU clockwise as far as it will go 20 3 Backup timer test The units are equipped with a backup exposure timer to prevent excessive exposure periods The backup timer test circuit can be tested as follows 1 Remove the cover from the PLU board 2 Push the TA switch to the UP TEST position 3 Turn the power on 4 Select exposure values of 63 kV 6 mA and compensation 5 Place the radiation shield over the collimator
73. anex Panoramic X ray Series 11 Time selector 11 Time Selector 4230 1 11 1 Introduction Time selector TSEL controls cephalo exposure times In panorama mode power up it is used as backup timer time out after 25 seconds in pano rama mode It is connected to pulse and logic board via six pin connector J1 Three pins of J1 is used by digital signals TIME1 TIME2 and CEPH_ON and other three are power lines All three signals are active high and logic level is 15V Three power lines are 24V 15V and ground Time selector uses 24V from which it regulates 5V with regulator IC4 The 15V is used only for digital signals CEPH_ON and TIME2 so the supply current depends on the loads on pulse and logic board Jumper JP1 is added on TSEL board to tell timing controller IC1 in which unit it is operating Excel Excel Ceph and Cranex C When it is shorted IC1 pin 25 connected to ground then Cranex C is selected and Excel Ceph when left open Exposure is always disabled in panorama mode in Cranex C by setting TIME2 high irrespective of whether exposure key is pressed or not 11 2 Time Selector 4230 1 functional description Service Manual 8200909 Time selector is based on timing controller unit IC1 It only needs external oscillator which is generated from 4MHz crystal X1 all exposure times are based on this frequency Timing controller scans 11 key keyboard which is organized as matrix having three rows First and second rows
74. arate controls for pulse width preheating and tube current feedback Regulated supply voltage for filament inverter FIV is connected to R83 R82 C34 network and produces reference to IC14 pin 4 through R40 R41 R43 C16 In the beginning of the preheat period IC10b turns on and connects reference to IC14 pin 4 since IC10d 1 on EXT NOT signal high The voltage of IC14 pin 4 rises This volt age controls the duty cycle during preheat time After the preheat time the EXT NOT signal goes low turns IC10d off and IC14 pin 4 drops low Pulse width is now controlled by tube current feedback 7 4 Service Manual 8200909 Cranex Panoramic X ray Series 7 Pulse Logic Unit PLU The tube current feedback signal MAI is connected through R75 to R38 The voltage across R38 is fed into input of error amplifier IC14 pin 2 The input IC14 pin 1 is connected to reference voltage on capacitor C19 Reference voltage is derived from 5 volts source of IC13 through R48 R51 R50 net work If 6 mA selection is made resistor R84 connects in parallel with R50 In compensation mode R85 con nects in parallel with R50 except in the middle part of exposure to produce a lower 7 5 or 4 5 mA current on sides and full 10 mA or 6 mA current in the middle The R86 C19 network filters the reference voltage to give a smooth change for tube current in compen sation mode Error amplifier adjusts pulse width so that feedback signal ac
75. ard by the AXV IC16 pro duces a 24 volt supply for technique selector boards indicator lights and microswitches IC15 produces a 15 volt supply for the logic and generator control ICs The R37 C12 network supplies a reduced input voltage for IC15 IC8 is located on the Partial Exposure Controller board PEC Note that not all units have the PEC board In normal operation the TA switch is in the DOWN position If the TA switch is in the UP TEST position radiation is generated when the exposure button is pressed but the rotating unit and cassette carriage do not move and all the microswitches except for the thermal switch in the tube head are bypassed The unit is ready to take an exposure when a high voltage 15 VDC is supplied to IC9 pin 6 This happens when 1 The start microswitch is closed indicating that the rotating unit is in the start position 2 The CAS microswitch is closed indicating that the cassette carriage is in start position 3 The temperature sensor s is closed indicating that the temperature in normal in the tube head s 4 Protection circuitry not activated If the TA switch is UP only the temperature sensor and protection circuitry are checked to see that they are in the ready condition 7 Pulse Logic Unit PLU Cranex Panoramic X ray Series When a high voltage is supplied to pin 6 on IC9 the ready light RYL signal will come on The protec tion circuitry trigger will prevent an
76. athological changed structures Those measurements which may be relied upon for instance angular measurements may be performed on such a panoramic radiograph 24 2 Quality Cephalometric Radiographs Service Manual 8200909 Cephalometric analysis is the term used for evaluat ing growth or morphology on the basis of cephalometric tracing The accuracy ofthe tracing depends on the quality of the film and the ability of the operator to locate the landmarks For instance if the patient s head is not exactly centered in the cephalostat certain structures will appear on the cephalogram as double images Accuracy and con sistency of technique are essential and are devel oped only through practice To make a cephalometric tracing a sheet of acetate paper is placed over the cephalometric film and is attached to the film along one edge with masking tape Using a sharp pencil the landmarks soft tissue profile planes and angles are traced The cephalogram should be traced on a view box in a room with reduced illumination to allow better visualization of indistinct landmarks The or ganization of a cephalometric analysis requires that first the cephalometric landmarks be located and then that certain landmarks be joined into cephalometric planes Once the planes are established angles can be measured and compared with established norms 24 Theory of operation 24 3 X ray principles Beam Quality Focal Spot Cranex Panoramic X ray Se
77. ay Series 22 4 Replacing the Front panel board Make sure that the default is set Jumper 22 5 Replacing the kV and Time Selector Check the reference voltages Refer to kV mA cali bration Calibrate the autoset kV 22 6 Replacing the Power Switching Unit PSU The power switching unit should be removed by unfastening the screws from the metal chassis Care should be taken to observe the polarity of the ribbon connectors All AMP connectors should be inspected after replacement to prevent pushed out pins from causing accidental failure Ground wires must also be removed and replaced Failure to replace ground wires here or on the tube head may cause external arcing After the PSU has been installed the following proce dure MUST be carried out a kV mA calibration procedure 22 2 Service Manual 8200909 Cranex Panoramic X ray Series 22 Replacing parts 22 7 Replacing the Tube Head Assembly Service Manual 8200909 The following special tools are required for electrical and mechanical checks when the tube head is changed DVM Alignment spike Panoramic fluorescent screen Ball and pin phantom CAUTION Protect your self from radiation when taking test exposures 1 Turn the power off Install the transportation pin into the counterweight Disconnect the connector and the ground wires from the tube head 2 Remove the tube head covers Mark the position ofthe THA and then remove the tube head by un
78. c X ray Series The position and form of the layer is independent of the movement patterns of the beam discussed previ ously These movement patterns serve only to define the projection of the object the jaws Starting from any of possible beam movement patterns the image layer may be given any desired form and position by matching the film speed at each moment during the exposure to the speed of the moving shadows of object points in the center of the desired layer In the horizontal plane the plane of rotation the rotation center serves as the functional focus of the projection The image is registered successively on the moving film as the beam scans the object In the vertical dimension the tube target serves as the focus of the projection The fact that the projections in the horizontal and vertical directions have different foci causes distortion effects that are characteristic of rotational panoramic radiography FILM PLANE CENTER OF THE BEAM PLACED OF THE CENTER OF THE LAYER DISPLACED TOWARD THE FILM C gt DISPLACED TOWARD THE ROTATION Service Manual 8200909 Cranex Panoramic X ray Series 24 Theory of operation Service Manual 8200909 At the center of the layer the magnification factors in the horizontal and vertical directions are equal This implies that a small flat object positioned at the center of the layer will be portrayed in proper pro portion Out
79. drive motors 24 VAC across PLU J2 20 pin ribbon cable Pin 1 2 9 13 15 17 19 16 18 14 20 Service Manual 8200909 Signal RFB 15 F1 F2 F V R1 R2 12 Description Signal ground Regulator voltage feedback Regulated supply 15V Filament inverter control High 1 2 VDC 0 2 VAC during exposure Filament inverter supply High 20 VDC during exposure Power regulator control High 2 2 DC during preheat low 1 5 DC after preheat Power inverter control 1 5 DC 0 3 VAC during exposure 7 Pulse Logic Unit PLU Cranex Panoramic X ray Series PLU J3 Front panel connector Pin 11 10 9 N Signal GND RYL FAILURE RET 24V D2 MAR Description Signal ground Ready light drive High 24 VDC when unit ready for exposure Protection indicator drive Low when protection condition occurs Return command High 24 VDC when return switch is pressed Regulated supply 24 VDC Compensation selection Shorted to ground when compensation selected 6 10 mA selection Shorted to ground when 6 mA selected PLU J4 Cassette motor versions only Special note pins 8 and 9 must be shorted PLU J5 Not in use Test circuit connector Pin 4 3 2 1 Signal RET GND 24V Description Exposure command High 28 35 VDC when exposure switch pressed Return command High 24 VDC when return switch pressed Signal ground Ground point for DMM
80. e Manual 8200909 Cranex Panoramic X ray Series 18 Troubleshooting Protection light comes on 1c 1s 2 2s 3c 3s 4c 4s 5c 5s 6c 6s 75 8 8s Line voltage not compatible with the terminal setting on the MPU Check line voltage or voltage and then check the terminal setting on the MPU If the setting is not compatible with the line voltage change the terminal setting The line voltage and terminal settings are as follows Line voltages Terminal 175 190 V usethe 190 V terminal 190 205 V usethe 200 V terminal 205 225 V use the 220 V terminal 225 250 V use 240 V terminal kV mA levels are too high Check and if necessary adjust the kV mA levels of the PLU board A head holder cable or connector is loose or damaged Check all cables connectors and ground wires Replace if necessary kV too high The PSU protection circuit monitors the regulator voltage If the regulator voltage is 200 V or above the PSU protection circuit will be activated which will terminate the regulator and inverter pulses raise the HFB signal to a value that will trigger the PLU protection circuit and switch the protection light on Check and if necessary calibrate the generator Inverter current too high Check and if necessary calibrate the generator Shorted D8 on PLU If the tube head arcs the mA will increase which can then destroy D8 on the PLU Replace D8 or the PLU Tube head defect
81. e frequency counter mode and then connect the DMM to TP mA and pin 5 on IC14 5 Adjust R45 to get a frequency of 47 kHz for tube heads with serial numbers beginning with 13xxxxx and 23xxxxx 40 kHz old tube heads with serial numbers beginning with 12xxxxx and 22xxxxx 6 Turn trimpots R41 PRE to the middle position R51 mA counter clockwise to a minimum R56 kV clockwise to a maximum R65 RFB counter clockwise to a minimum 7 Connect the DMM to TPs PKV and PKV on the PLU 8 Select exposure values of 81kV 10mA and no compensation Service Manual 8200909 20 1 20 Testing Calibrating and Adjusting 9 10 11 12 13 14 15 Cranex Panoramic X ray Series Press and hold down the exposure switch and adjust R65 RFB until the DMM reading is 8 15V 90kV Then adjust R56 kV until the DMM reading is 7 34V 81kV Connect the DMM to TPs mA and mA on the PLU board Push the PRE switch to the left the OFF posi tion Select exposure values of 63kV 10mA and no compensation Press and hold down the exposure switch and adjust R41 PRE until the DMM reading is 1 5V 1 6V 40 kHz old tube heads with serial numbers beginning with 12xxxxx and 22xxxxx 1 2 1 3V 47kHz old tube heads with serial numbers beginning with 12xxxxx and 22 2 55 2 65V 47kHz new tube heads with serial numbers beginning with 13xxxxx and 23 Push the PRE switch to t
82. e unit or replacing parts Before servicing the unit familiarise yourself with local and national radiation safety standards and requirements relating to dental x ray equipment If you need to take test exposures you MUST take adequate steps to protect yourself from radiation Use a lead apron or stand behind a suitable radiation shield In addition when taking exposures stand at least two metres six feet from the unit Service Manual 8200909 Cranex Panoramic X ray Series 1 Introduction Mechanical safety Electrical Safety Switch the power off before repairing or replacing mechanical parts Be careful when operating the unit not to get body parts or clothing trapped between moving parts The aperture plate in the collimator is made of lead Pb which is a toxic material Do not touch it with your bare hands Switch the power off before repairing or replacing electrical parts Live electrical terminals are potentially dangerous Make sure that main power supply is OFF before removing covers or circuit boards This equipment should be used only in areas that are provided with a protective earth connection to ensure an equipotential ground connection Before cleaning or disinfecting the unit switch the main power supply off Electrostatic discharge Service Manual 8200909 Electrostatic Discharge ESD can damage or de stroy electronic components A static electricity charge builds up in everyone The build up is d
83. eight adjustment movement pan or pan ceph does not work 18 4 No radiation when exposure taken movement but no lights 18 5 Service Manual 8200909 vii Contents Cranex Panoramic X ray Series Image quality problems panoramic units 18 7 End of the image is missing partial exposure 18 7 Part of the image is in focus and part out of focus 18 7 Image too light too dark or not enough contrast cassette versions only 18 7 The mage IS notsymmetrical usus utente bites p Dai 18 8 There are dark vertical lines over exposure on the film 18 8 The length of the image exposed area in not 18 9 The middle balls on the ball pin image are oval and not round 18 9 Image quality problems Ceph units 18 10 The margins are not all the same width sees 18 10 19 Removing COVES a a aak 19 1 19 1 Rotating Unt Pr aaa 19 1 19 2 Upper shelf cover 19 4 20 Testing Calibrating and Adjusting 20 1 20 1 kV mA Calibration procedure cc ssesssssssssssssssssneeeeeeeeeeeeeeeeeeeeees 20 1 20 2 Adjusting the low
84. er of the beam and ata great distance from the center of the layer Unsharpness alone does not cause this effect in the image The extreme magnification of objects displaced toward the rotation center is also a contrib uting factor The tooth in this case is so greatly magnified in the horizontal dimension that the result ing image has a lower contrast relative to the sur rounding structures than it would have had without the magnification The tooth will be concealed due to the combined effects of distortion and unsharpness The unsharpness and distortion effects are important criteria when evaluating panoramic radiographs The fact that the teeth in a certain region appear too broad as compared to their length indicates together with unsharpness that this region has been malpositioned toward the rotation center of the beam during the Service Manual 8200909 Cranex Panoramic X ray Series 24 Theory of operation exposure A narrowing of the teeth on the other hand together with the accompanying unsharpness indicates that the region in question has been malpositioned toward the film during the exposure This information is easily used to correct the patient s positioning when a retake is made Generally if there is no significant unsharpness and no significant distortion in a region of a panoramic radiograph or in the whole radiograph this indicates that the image is essentially reliable when evaluating the morphology of normal or p
85. erformance Standard 21CFR Subchapter J The unit must be installed in a protected clinical environment Description Dental panoramic and panoramic cephalometric x ray units with a high frequency switching mode x ray generators The panoramic version takes panoramic expo sures The panoramic cephalometric version takes panoramic and cephalometric exposures and uses a dedicated x ray source to take cephalometric exposures Generator TUBE OPX 105 DE 100 15 or equivalent FOCAL SPOT 0 5 mm IEC 336 TARGET ANGLE 5 TARGET MATERIAL Tungsten OPERATING TUBE POTENTIAL Panoramic 63 81 kV 5 kV at preselected settings OPERATING TUBE CURRENT 6 mA and 10 mA 1 mA at preselector 4 5 mA and 6 mA or 7 5 mA and 10 mA in compensation mode MAXIMUM TUBE CURRENT 11 mA MAXIMUM OUTPUT POWER 945 W nominal FILTRATION minimum filtration 2 5 mm Al BEAM QUALITY HVL over 2 5 mm Alat 81 kV OUTER SHELL TEMPERATURE 50 122 F maximum DUTY CYCLE Panoramic 1 15 81 kV 10mA Cephalometric 1 20 81 kV 10mA Service Manual 8200909 25 1 25 Technical specifications Cranex Panoramic X ray Series Power requirements INPUT VOLTAGE 175 250 VAC 10 50 60 Hz adjustable single phase grounded socket MAXIMUM CURRENT 7 A at 81 kV 10mA MAXIMUM LINE RESISTANCE 1 ohm MAXIMUM LINE FUSING 10 A slow main fuse 8A slow in device LINE SAFETY SWITCH when required Approved type min 10 A250 VA
86. es the movement When leading edge of the film reaches the secondary slot the F microswitch connects pin 14 IC2 to pin 10 IC2 over 9 volts and the voltage of pin 8 IC2 goes up Service Manual 8200909 Cranex Panoramic X ray Series 7 Pulse Logic Unit PLU Service Manual 8200909 The voltage of pin 11 IC5 goes up because pin 13 IC5 was at a high voltage level The voltage of pin 13 IC5 stays at a high voltage level as long as the voltage of capacitor C6 is less than the voltage of the V TIMER C6 is charged through R12 and gives BACK UP TIME of about 23 5 sec The high voltage of pin 11 IC5 causes the voltage of pin 12 IC9 to go down but because the voltage of pin 5 IC8 is high the voltage of pin 4 IC8 re mains low A high voltage on pin 11 IC5 normally produces a low voltage on pin 11 IC7 EXT NOT signal When the EXT NOT signal is low the X rays will be gener ated When the trailing edge of the film passes the sec ondary slot the F microswitch grounds pin 10 IC2 which causes the voltage at pin 8 IC2 to go down and the voltage EXT NOT signal at pin 11 IC7 goes up causing the generation of X ray stop When the voltage on pin 11 IC5 goes down the voltage on pin 4 IC8 goes up and a low voltage is produced on pin 11 IC8 which deactivates the P relay If the exposure switch is released during exposure or the END microswitch opens at end of rotation the voltage of pin 4 IC7 will go
87. f narrow beam rotational radiology Rotational panoramic radiography is a specific radio graphic projection technique which utilizes a narrow beam of X rays to image a curved layer The simplest projection technique applied in practice utilizes one stationary rotation center placed at one side of the jaws projecting the other side onto the film One side ofthe jaws is exposed at a time and the position of the rotation center the functional focus of the projection is shifted symmetrically between expo sures by moving the patient This projection technique creates whatis called a SPLIT IMAGE In Cranex systems to create continuous images several different movement patterns of the beam are utilized to achieve the desired projection of the jaws The objective is to project each part of the jaws as close to perpendicular as possible The beam may be given a sliding movement throughout the total excursion so that the effective projection center the functional focus is continuously shifted along a defined path The central ray of the beam is always tangential to this path at some point The form of the path defines the direction of the beam and hence the projection of each successive part of the jaws SPR SA Nd gt ROTATION lt CENTER OF THE BEAM FIRST POSITION SECOND POSITION PATH OF THE SLIDING ROTATION CENTER Service Manual 8200909 24 1 24 Theory of operation ROTATION CENTER Cranex Panorami
88. g light knob until the focal trough light strikes the side of the chin rest 5 Adjusttrimmer R10 on the positioning display board until the number on the display is zero 00 Position Display Board Light beam Lip support Display yr Positioning knob Focal trough light 20 8 Service Manual 8200909 Cranex Panoramic X ray Series 6 Light switch 8 9 Service Manual 8200909 20 Testing Calibrating and Adjusting Rotate the focal trough positioning knob clock wise to move the light beam 20 mm backwards away from the column Use a ruler to position it correctly Adjust trimmer R9 on the positioning display board until the number on the display is 20 lt 20 mm Positioning knob Display Light beam Rotate the focal trough position knob back to its original position striking the side of the chin rest and check that the number on the display is still zero 00 If not adjust trimmer R10 again Replace the top cover 20 Testing Calibrating and Adjusting Cranex Panoramic X ray Series 20 6 Adjusting the Z motor belt Ifthe Z motor is running but the Z carriage does not move the tension of the Z motor belt needs to be adjusted To do this 1 Remove the back cover 2 Loosen the three screws that secure the motor base plate to the Z carriage frame 3 Push the motor assembly to tension the belt and then tighten the base plate screws Z carriage
89. ge section of the generator High frequency power signals HP1 HPI and HP2 are connected to high tension transformer T1 which supplies the two cascade multipliers C1 15 and C16 30 Cascade multipliers C1 15 multiply rectify and filter the transformer output to a maximum 41 kV and cas cade multipliers C16 30 to a maximum of 41 kV The tube voltage is derived from this bipolar supply through surge resistors R4 9 The positive half of the tube voltage is connected to 3 x 150 Mohm resistors that a form high voltage feedback signal HFB High frequency filament heating signals FP1 FIV FP2 are connected to the filament transformer T2 which supplies the X ray tube filament The other return line of the high tension transformer is grounded and the other forms the MAI signal to the PLU for tube current adjustment The current in the MAI line is equal to the tube current The tube head contains temperature sensor that opens if the oil temperature reaches 75 C 167 F The ready signal is disabled in this case and next exposure is possible only after cooling The panoramic tube head has a fan to improve cooling Cranex Panoramic X ray Series 13 Tube Head Assembly THA 13 2 Circuit diagram a 2 Nd rw 08 927 vzg 351 270 tdd L imu 28 34 51 JO ehe Service Manual 8200909 13 2
90. ges 0 PLU IC 9 pin 2 with the result that IC 1 pin 11 Reset and IC 2 pin 22 change to 0 state and divider 4040 and EPROM are activated The connection of the F microswitch in the cassette carriage changes the state of Flip Flop FF IC 9 pin 3 clk input to 1 through PLU J2 7 with the result that pin 2 Q changes to 0 Then the IC 4040 counter receives the clock signal IC 1 pin 10 and starts the stepping and EPROM the program Memory starts the operation from address 000 except when the TMJ 2 program is selected when the start address is Hex 800 The address increases by increasing one step every line cycle 50 60 Hz The state 1 of the selected driving bit IC 2 output causes the PRE signal IC7 pin 3 J2 10 to rise to 15 V The rising edge of PRE signal IC 9 pin 11 sets the output Q of IC 9 to 1 if bit 3 is 1 in EPROM The state of FF IC9 keeps the preheating on by keeping the EXT signal PEC J2 pin 11 in 15 V until bit 3 changes to O state with the result that FF is reset EXT drops to 0 and radiation starts When EXT changes back to 15V the radiation stops Service Manual 8200909 Cranex Panoramic X ray Series 8 Partial Exposure Controller PEC 8 4 Mode selector 8 5 Motor Driving 8 6 J31 8 7 IC 10 8 8 PEC control panel Service Manual 8200909 The push buttons located on PEC controlling board are comprised of switches SW1 SW7 Selecting logic includes
91. he right to the normal position Select exposure values of 63kV 10mA and no compensation Press and hold down the exposure switch and adjust R51 mA until the DMM reading is 2 8V 10mA Select exposure values of 63kV and no compensation Press and hold down the expo sure switch and check the DMM reading it should be 1 6V 1 8V Service Manual 8200909 Cranex Panoramic X ray Series 20 Testing Calibrating and Adjusting 16 Connect the DMM across Test Point PKV PKV on PLU 17 Check the voltage levels for the different kV selections according to following table 63kV 5 72V T3kV 6 62V 65kV 5 90V 75kV 6 80 67kV 6 08V 77KV 6 98V 69kV 6 26V T9kV 7 16V 71kV 6 44V 81kV 7 34V Following steps apply to ceph units only 1 Turn trimpots R42 PRE to the middle position R52 mA counter clockwise to a minimum R54 kV clockwise to a maximum 2 Connect the DMM to TPs CKV and CKV on the PLU 3 Select exposure values of 81kV 10mA compensation 3 2 seconds Place the lead shield in front of the cephalostat beam 4 Press and hold down the exposure switch and adjust R54 kV until the DMM reading is 7 34V 81kV 5 Connect DMM across Test Points mA on the PLU 6 Push the PRE switch to the left the OFF position Select exposure values of 63kV 10 mA and no compensation Service Manual 8200909 20 3 20 Testing Calibrating and Adjusting 7 10 Cr
92. he side of the cas sette with the L R marks or a cassette with an imaging plate Press the return key to drive the unit to the ready position Select exposure values of 63 kV 6 with spinal compensation off Slide the cassette carriage to the left until the READY light comes on AutoSet Lv e 81 e 75 e 5 READY DM digital versions 3 4 Open DfW and open a new patient card Press the RETURN key to drive the rotating unit to the start position The READY light and 65 kV light will come on DS digital versions 3 Open the CDR program When the program is running open a New Exam This will activate the CCD sensor in the unit so that an exposure can be taken Refer to the User s Guide supplied with the CDRPan software for information on how to do this Service Manual 8200909 Cranex Panoramic X ray Series 21 Aligning procedures 4 Press the return key to drive the unit to the ready position Select exposure values of 75 kV 6 mA with spinal compensation off Slide the cassette carriage to the left until the ready light on the unit control panel starts to flash This indicates that an exposure can be taken 5 Protect yourself from radiation and take an exposure WARNING RADIATION 6 Process the film and examine the image With imaging plates scan the image and then open the image and examine it using the dental imaging software that is being used With
93. hing regulator The regula tor works at 23 5 kHz old 20 kHz and consists of transistor switches a LC network and a flywheel diode The voltage across the LC network capacitor is dependent on the duty cycle on time a pulse width of 23 5 kHz waveform of the transistor switches 2 10 Service Manual 8200909 Cranex Panoramic X ray Series 2 Unit description The output voltage of the power switching regulator capacitor voltage of the LC network is fed to the power inverter The power inverter consists of two transistor switches working at 23 5 kHz old 20 kHz The transistor switches work in a push pull mode creating an AC waveform in the output of the H T transformer The output of the H T transformer is connected to voltage multipliers that multiply rectify and filter high voltage for the X ray tube The level of high voltage is dependent on the input voltage of the power inverter As a result the high voltage is dependent on the pulse width of the power switching regulator There is feedback from the high voltage which is compared with a preset value and if it is found to be different the error is corrected by varying the pulse width of the power switching regu lator This feedback works in real time and is fast enough to compensate for example a 60 Hz ripple X ray Tube Current Filament heating that controls the X ray tube cur rent is produced by using a high frequency 23 5 kHz inverter The pulse width of the i
94. ic 16 3 16 4 PDC timing circuit DM version component layout 16 4 17 Interlock circuit board for DS versions 17 1 T ESI Cs PNE RENE 17 1 17 2 Interlock circuit board connector signals 17 2 17 3 Interlock circuit board DS schematic diagram 17 5 17 4 Interlock circuit board DS componentlayout 17 6 18 Troubleshooting Se 18 1 18 1 F se PP 18 1 18 2 Problems causes and solutions S 18 2 Operating problems panoramic units 18 2 No power when the unit is switched on switch light not on 18 2 Exposure warning lights and buzzer come on when unit switched on 18 2 Ihe READY light does not come ssa 18 2 Prote tion HONE COMICS P aes 18 3 None of the patient positioning lights come on 18 4 One of the positioning lights does not come on 18 4 Bulbs the patient positioning lights keep blowing 18 4 The patient positioning lights do not switch off after the preset time 18 4 H
95. in start position Cassette start signal High 24 VDC when rotation unit and cassette carriage are in start position Cassette carriage position in Ceph mode Open across when cassette carriage in Ceph position 7 Pulse Logic Unit PLU Cranex Panoramic X ray Series PLU J9 Cassette carriage microswitches DM versions Pin Signal Description 1 Notin use 2 3 Shorted 415 Shorted PLU J9 Cassette carriage microswitches DS versions Pin Signal Description 1 CDR remote control box 2 CDR remote control box 2 3 Shorted 4 5 Shorted PLU J10 Compensation microswitch Pin Signal Description 2 D1 Compensation control signal Shorted to ground in compensation mode except in the middle part of the revolution 1 D2 Compensation selection Shorted to ground when compensation selected 7 12 Service Manual 8200909 7 Pulse Logic Unit PLU Cranex Panoramic X ray Series 7 10 PLU Schematic diagram F m HOLMS oway LJ l erent peas uoiisod ILUOIOUDOI O palm ZOD ZDQ XINVUD UI I 1 Q Hd3O ZOA ul ANO E 1 7 s02 I 09907 b OLS or 1 EM r3 Ji e er Exi 619959 D o 1 A UL vuol O 2t sen 19208 zl 9191 e
96. ive Replace tube head Poor or no grounding between PLU PSU MPU and tube head Check groundings Service Manual 8200909 18 3 18 Troubleshooting Cranex Panoramic X ray Series None of the patient positioning lights come on 1c The light button is defective 1s Check operation of the button Replace if defective 2c Fuse F5 the MPU has blown 2s Replace fuse F5 3c D17 onthe MPU low voltage board is defective 3s Replace D17 or Low Voltage Board 4c The positioning light timer or V relay not working 4s Replace Low Voltage Board One of the positioning lights does not come on 1c Bulb blown 1s Replace bulb Bulbs in the patient positioning lights keep blowing 1c D17 on MPU low voltage board may be short circuited 3s Replace D17 or Low Voltage Board The patient positioning lights do not switch off after the preset time 1c Timer circuit on the MPU Low Voltage Board does not work 1s Replace Low Voltage Board Height adjustment movement pan or pan ceph does not work 1c The switch is faulty 1s Replace switch 2c Check the reference voltage from the Z drive board If no voltage the board is faulty 2s Replace the Z drive board 18 4 Service Manual 8200909 3c 3s 4c 4s Cranex Panoramic X ray Series 18 Troubleshooting The Z drive motor is faulty Replace the motor The drive belt is slipping or broken Replace the drive belt See section 20 Testing Calibrating and Aqjusting Adjusting the
97. lbs 22 6 22 12 Replacing the Focal Trough Cable 22 7 22 13 Replacing z carriage brake pads BaseX 22 9 22 14 Replacing the cassette carriage roller 22 11 22 15 Replacing the CCD sensor DM version 22 12 22 16 Replacing the CCD sensor DS version 22 13 23 Yearly CHECK MMC MT e TUA 23 1 Service Manual 8200909 ix Contents Cranex Panoramic X ray Series 24 Theory of ODOrallOB uU LUIS n 24 1 24 1 Working principles of narrow beam rotational radiology 24 1 24 2 Quality Cephalometric Radiographs sss 24 5 24 6 BeamOualliy u k u T Dp EUM NR PN ns 24 6 FOCAL 24 6 Magnifica tons E ess 24 7 25 Technical specifications aaa a 25 1 eee a RERE RE 25 7 x Service Manual 8200909 Cranex Panoramic X ray Series 1 Introduction 1 Introduction 1 1 Scope of this manual Service Manual 8200909 This manual describes how to service the Cranex Excel range of dental panoramic x ray units The range includes four cassette versions and two digital versions The cassette versions are the Excel Excel Ceph BaseX Cranex C cephalo
98. le 5 V Div 4150 42V 142 XScale 10 us Div XANO 20 ys X Size 512 92 Maxinum 68V f a Mininum 54V 42 X N N K ba J A 58 pe 10 8 158 10 us Div CURRENT VAWE FORM 83k 10m4 J3 p HPI fig 6 Service Manual 8200909 20 19 20 Testing Calibrating and Adjusting Cranex Panoramic X ray Series Current Wave form with 81kV 10mA Memory 7 254 Name 7 Date 26 3 2003 214 Time 11 00 43 YScae 5 V Div YAtsO 16 4 XScale 10 ys Div xAtO 20 ys 14 Size 512 Maximum 85V Minimum 6 0 v 54 14 35 66 43 5 10 ps Div CURRENT VAWE FORM 81kV 10m J 3 5 HPI fig 7 5 Make an exposure and check the voltage across regulator transistors Channel A 300 Name Channel A Date 26 3 2003 250 Time 11 00 42 Y Scale 50 V Div Y At 50 100 V 200 XScale 10 ps Div 0 20 ys 150 XSie 512 Maximum 292 V Minimum 2 V V 100 50 0 50 100 10 ps Div REGULATOR VOLTAGE ACROSS REGULATOR TRANSISTORS fig 8 20 20 Service Manual 8200909 Cranex Panoramic X ray Series 20 Testing Calibrating and Adjusting 6 Make an exposure and check the voltage across inverter transistors Memory 11 600 Name Memory 11 Date 26 3 2003 500 Time 13 47 34 Y Scale 100 V Div Y At 50 400 50 200 V x Scale 10 ps Div 0 20 ps 300 XSie 512 Maximum 344 V Minimum 36 V 200 100 0 100 200 10 ps
99. line triggering 20 5 20 3 m RA 20 5 20 4 Calibrating the Autoset kV cassette units only 20 6 20 5 Calibrating the positioning display 20 8 20 6 Adjusting the Z motor belt 20 10 20 7 Adjusting the up down speed z driver Excel and Excel Ceph units only I uu uu eo enti Caius 20 11 20 8 Adjusting the volume of the exposure warning tone 20 11 20 9 Calibrating CCD sensors DM 20 11 20 10 Calibrating CCD sensors DS versions 20 13 20 11 Checking the operation of PSU 47602 1 20 14 Checking the reference voltages 20 14 Power transistor verification 20 15 Checking the wave forms 20 16 viii Service Manual 8200909 Cranex Panoramic X ray Series Contents 21 Aligning procedures Ju LLULLU III IILI crei s dux OE Gaia RE 21 1 21 1 Taking ball pin exposure 21 1 21 2 Analysing the ball pin image
100. m A D converter Word 0 corresponds to 63kV and word 9 81kV Adjustment of this circuit is as follows Zero short connect analog inputs of A D converter and adjust output to 0000 R 43 Relative zero the head support closed should now be adjusted to give BCD word 0000 if you want the minimum kV value to be 63 kV R45 Note that the value of kV selector can only be changed when the Ready light comes on Gain 1 used to get BCD word 9 when the head support is wide open R44 With these two adjustments you can also determine the limits for min and max kV to be used by the automatic select Service Manual 8200909 Cranex Panoramic X ray Series 10 kV selector Autoset kV The most significant digit from A D converter is read to multiplexer circuit IC10 through latch circuit IC9 Ten outputs of this multiplexer are controlled by BCD word 0 0000 9 1001 If the measured value from head support is 0 the minimum small patient the multiplexer IC10 selects its output 0 pin 9 to be activated This means that there is a connection between pin 9 and pin 1 common Outputs of the multiplexer are connected to Cranex kV selector 0 63kV 9 81kV The selected kV value is transferred to kV selector the moment the unit is in the Ready position and ready to take an exposure If unit is set to the Test or Ceph mode no auto matic kV select is possible Changing kV
101. metric unit only These use conventional film and or Soredex imaging plates The digital versions are the Excel D BaseX D The digital versions use CCD sensors Two versions of the sensor are available DM and DS versions Functional and operational differences between the different versions are given where appropriate IMPORTANT NOTE The information in this manual also applies to earlier cassette versions ofthe Cranex the Cranex 3 Ceph 3 2 5 and Cranex C Differences between these earlier versions and the latest Excel and BaseX versions will be described where appropriate 1 Introduction Cranex Panoramic X ray Series 1 2 Associated documentation Cranex Excel BaseX user s manuals These describe how to operate the different versions of the unit Cranex Excel BaseX installation manual and sepa rate appendices These describe how to install and set up the different versions of the unit 1 3 Servicing warnings and precautions General precautions Radiation Safety The Cranex Excel range of dental x ray units must only be serviced and repaired by service personnel who have been trained and approved by Soredex This manual is aid to servicing the units and is NOT a substitute for approved Soredex service training Before attempting to service a unit make sure that you know how to operate it Read the appropriate Cranex Excel user s manual Only use original Soredex spare parts when repair ing th
102. mponent layout m 1 1 c BARA3 Al ns LO M LC OE EOI 3829 E N m ad BAR43 i lt 28 857 47 he 100 Weg 4k75 R30 4k75 R29 4k75 R28 4k75 R27 4075 R26 4k75 R25 4k75 R24 4k75 R23 4 75 R22 4 75 R21 4K75 R20 562 8 lt 2 N BZX840155 cx LACAN 56 2r 562r R33 9562 562r R34 562r 562r R37 562r 562r R38 Sch xs Tr HOOK 40175 iuF a 401 C16 10k0 R6 IC5 m oO 5 18 00 5 4071 C7 m 3328 Link R4 C1 R1 4120 2 kV selector 48013801 10 Service Manual 8200909 10 kV selector Cranex Panoramic X ray Series 10 8 Service Manual 8200909 Cranex Panoramic X ray Series 10 kV selector 10 7 kV selector switches schematic diagram kUSEL 9 GND J2 J2 1SU S11 J3 81kU tc 34 S10 J3 9kU 2c J4 S9 13 77kU 58 J3 75kU c 4 S J3 73kU 56 J2 71kU Zc 33 S5 J2 69kU c 54 J2 67kU c 4 53 J2 6SkU 3c 52 J2 63kU cjJ 51 J2 TEST c j4 TEST J2 Service Manual 8200909 10 9 10 kV selector Cranex Panoramic X ray Series 10 8 kV selector switches component layout o o O 01 011 7040 s e NM 2 gt QJ A e 10 10 Service Manual 8200909 Cr
103. nductance along path CH2 CH10 D25 The duty cycle of transistors determines voltage across C10 C14 R41 protect D25 against voltage spikes Opto isolator IC1 LED is fed through R31 R45 C19 to give feedback signal RFB which depends on C10 voltage RFB signal goes to the PLU C10 voltage is fed to power inverter section through fuse F1 Power inverter transistors TR13 and TR14 work in push pull mode at 20 kHz frequency and constant 90 duty cycle They are driven through T1 and T4 The power inverter drives a high tension transformer in tube head trough HP1 and HP2 Transformers T5 and T6 with D41 and D42 balance loading C13 is an intermediate filter capacitor Service Manual 8200909 Cranex Panoramic X ray Series Test point TP2 Inv dr TP7 TP8 Reg dr 9 TP5 TP6 Fil dr 9 Service Manual 8200909 Steady state ACV 0 12 Power Switching Units PSU D26 027 D29 network prevents TR13 saturation and D28 improves turn off D32 C11 R35 protects TR13 against voltage spikes in turn off and D31 forms an opposite current path Identical networks can be found at TR14 When operating power inverter current flows along the path C10 F1 HPI H T HP1 D30 TR13 C10 or C10 F1 HPI HP2 D35 TR14 C10 NOTE The power section of unit is galvanically connected to mains whereas all other parts of electronics including kV mA drive board are grounded Never measure
104. ng Calibrating and Adjusting Remove the short from pins 10 and 11 and re connect the head support cable to J6 Close the temple supports as far as they will go Repeat the operation described in 4 above only this time adjust trimmer R45 to set the kV value to 67 kV Open the temple supports as far as they will go Repeat the operation described in 4 above only this time adjust trimmer R44 to set the kV value to 79 kV The head support calibration is now complete NOTE The kV range from 67 79 is based on a Kodak T MAT G Lanex Medium film screen combination 240 speed at 10 mA with spinal compensation ON or a Kodak T MAT G Lanex Regular film screen combination 400 speed at 6 mA with spinal compensation ON 20 Testing Calibrating and Adjusting Cranex Panoramic X ray Series 20 5 Calibrating the positioning display After the positioning display board or focal trough wire has been the position display must be cali brated This is done as follows 1 Remove the cap from the focal trough positioning knob loosen the nut that holds the knob in posi tion and then remove the knob Remove the top cover from the lower shelf and then replace the focal trough positioning knob and secure it in position Focal trough positioning knob 2 Insertthe chin rest into the lower shelf 3 Switch the unit on and then switch the patient positioning lights on 4 Rotate the focal trough positionin
105. ng problems panoramic units No power when the unit is switched on switch light not on 1c There is line voltage 1s Check and correct reason for line voltage failure 2c Fuses F1 and F2 have blown 2s Replace F1 and F2 with an 8 A fuse Turn the power on If the display lights come on the low voltage side of the power supply is operating Press the exposure button If fuse F1 or F2 blows again the high voltage card is shorted Check diode bridge D1 on MPU High Voltage Board If D1 is faulty replace Exposure warning lights and buzzer come on when unit switched on 1c TR2is shorted on the PLU board and the exposure warning lights sockets have been damaged by overtightening the bulbs 1s Replace the lamp sockets transistor TR3 or the PLU board The READY light does not come on 1c The unitis not in the ready position 1s Press the RETURN key to drive the unit to the ready position Then slide the cassette carriage where applicable to the left as far as it will go 2c Unit in the ready position but no READY light The cassette carriage or start microswitch is defective or the unit is in the protection mode or the thermal switch inside the tube head is open 1s Turn the TA switch on the PLU board to the up position If the READY light comes on the cassette carriage or start microswitch is defective If it does not the unit is in the protection mode or the thermal switch inside the tube head is open 18 2 Servic
106. not start when cephalometric operation is selected Low when cephalostat is selected PEC J4 Cassette motor supply from PLU where appropriate Pin Signal Description 1 Cassette motor supply High 20 VAC MD1 to 2 during return movement when TA switch is down 2 Cassette motor supply MD2 3 Cassette motor supply High 20 VAC MD1 to 2 after preheating when TA switch is down Service Manual 8200909 8 5 8 Partial Exposure Controller PEC Cranex Panoramic X ray Series PEC J5 Cassette motor where appropriate Pin Signal Description 1 Cassette motor drive High 20 VAC to 2 during return movement when TA switch is down 2 Cassette motor drive 3 Cassette motor drive High 20 VAC to 2 when RL1 is O and RL2 1 or RL1 and RL2 are 1 PEC J6 Rotation motor supply from PLU Pin Signal Description 1 Rotation motor supply High 20 VAC MD1 to 2 after preheating when TA switch is down 2 Rotation motor supply MD2 3 Rotation motor supply High 20 VAC MD1 to 2 during return movement when TA switch is down PEC J7 Rotation motor Pin Signal Description 1 Rotation motor supply High 20 VAC to 2 when RL1 0 and RL2 1 RL1 1 and RL2 O 2 Rotation motor supply 3 Rotation motor supply High 20 VAC to 2 during return movement when TA switch is down 8 6 Service Manual 8200909 Cranex Panoramic X ray Series 8 11 Partial Exposure Controller PEC
107. nverter is variable to allow filament heating to be adjusted The actual X ray tube current is compared to a preset value and if it is found to be incorrect the inverter pulse width is changed to compensate the error Automatic kV selection Service Manual 8200909 The head support has a built in potentiometer that measures the patient s head when the temple sup ports are closed A signal from the potentiometer goes to the kV selector which then selects a suit able kV value 2 Unit description Cranex Panoramic X ray Series Exposure times 50 Hz 60 Hz Tolerance Normal 19s 16s 15 Child Sinus 17s 14s 15 Sides 11s 9s 15 Middle 10s 8s 15 TMJ 3 3 3 3 3 3 3 3s 15 2 12 Service Manual 8200909 Cranex Panoramic X ray Series 3 Main wiring diagrams 3 Main wiring diagrams 3 1 Sheet 1 cassette version gt To Main wiring diagram sheet 2 all versions CEPHALOMETRIC TUBE HEAD ASSEMBLY CEPH THA CTHA CEPH THA 172 56 7 8 Replaced with amp n HHC J1 GND do HAON jumper between pins 7 and 8 EE eer E I HHC J3 M inca s CTPA JI C 5 CEPHALO 5 s 9 PSU J1 PSU J2 TURF EAS 140 CABLE PLU J6 PEC J4 PEC J6 PEC J5 1 nc oi A DENSITY q bas CICS GND microswitch HHCN6 PEC J3 GND HEAD HOLDER e 5 5 ES
108. o 5v when radiation starts and switch 1 is in the ON position Service Manual 8200909 Cranex Panoramic X ray Series 16 3 PDC timing circuit DM schematic diagram 15V A AXV 1 13 1 21 42 21 m 1 22 42 22 m t t 42 23 1 25 Service Manual 8200909 15 15V 42 15 3403N RI2 16 PDC timing circuit for DM versions RLY VB24 vb 24 PDC Timing circuit 4801387 16 PDC timing circuit for DM versions Cranex Panoramic X ray Series 16 4 PDC timing circuit DM version component layout ce e gt lt e e 8 2 a o 5 e PDC Timing Circuit 4801387 16 4 Service Manual 8200909 Cranex Panoramic X ray Series 17 Interlock circuit board DS versions 17 Interlock circuit board for DS versions The purpose of the interlock circuit is to galvanically isolate the CCD sensor from the Cranex unit and to allow an exposure to be taken after the DS program activates the exposure sequence The ready light will start to blink when an exposure can be taken 17 1 Operation Interlock circuit is connected in series with the ready signal When a program is selected the Remote Module sends a signal to J3 which will then activate opto isolator IC3 When IC3 pin 4 goes high the ready state is transferred to PLU through pin J2 pin 10 The purpose of IC1 is to activate flash the ready light which is connected to TP
109. ol circuit IC2 limits the duty cycle and the current to that value 15 5 Patient positioning lights When the UP DOWN switch is pushed transistor T1 controlled by the START signal turns on This triggers the positioning light timer in the mains power unit and patient positioning lights are automatically switched on 15 6 Z Driver Unit Connector Signals ZDU J1 At lower shelf Pin 1 2 3 Signal 24V GND LIGHT REW FW GND Description Unregulated supply 28 35 VDC Signal ground Patient positioning lights trigger High when 28 30 VDC Up Down switch is pressed Z carriage moves down when grounded low Z carriage moves up when grounded low Signal ground Service Manual 8200909 Cranex Panoramic X ray Series 15 Z Driver Unit 15 7 Z driver schematic diagram 12U 12U x R2 4 ru 1 2 py 120 240 p4 DS 24U 24U J1 R4 4011 1N4148 1N4148 C1 C2 1 1 C9 10 IRF530 24U T3 do R6 T R28 IC3 35 4 86322 doi LIGHT J1 2004 x 1N4148 219 x R10 5 R13 R14 18 24U hd N C6 C5 1 fa 10n T 10n 5 x4 C R17 ell Service Manual 8200909 15 3 Cranex Panoramic X ray Series 15 Z Driver Unit 15 8 Z driver component lay out O MS 8940 912 ed SL bl Bl 21 az gessul eesJuI Gesdu1 9058341 9q 8E TT zzy HBT HOOT 29 I AZt cn
110. oo wide fast Too narrow slow L IOI IOI IOIOIOIOIOIOI IOI IOI IOI I L IOI IOI IOI IOIOIOIOIOIOI IOI IOI IOI I To adjust the speed of the cassette carriage see Adjusting the length of the image in the installation manual The middle balls are not the same shape as the side balls If the images of the balls in the middle of the expo sure are a different oval shape to the balls at the sides this indicates that the focal trough is not cor rectly positioned IOI IOI 1OIOIOIOIOIOI IOI IOI IO I I Too far forward MOIOIOL IOI IOI I I col IOI IO IOIOIO I L Too far back To adjust the position of the focal trough see Check ing the position of the focal trough in the Installation Manual Service Manual 8200909 21 5 21 Aligning procedures Cranex Panoramic X ray Series The shape of the balls are not the same on both sides If the images of the balls on one side of the sure are a different oval shape to the balls on the side it indicates that the centre of rotation is not correctly positioned IIO IO IOIOIOIOIOIOT IO IO ICI L Too far to the right IOO I IO IO IOIOIOI IOIOIO IIOI IOI 101 Too far to the left To adjust the centre of rotation see Checking and adjusting the centre of rotation in the Installation manual 21 6 Service Manual 8200909 Cranex Panoramic X ray Series 22 Replacing parts 22 Replacing parts CAUTION Switch the unit off before repairing
111. oramic X ray Series 6 9 Low voltage board schematic diagram N oa N T N IN 24 470u C9 il 4 121 N OT 6 1 9 x di lt tc tr T 4 IH z Ta m gt 4 ne g5 F m tr 0 629 2 d um 5 gt D O s r S r9 Cer N a a gt i O 50 24URC GND 20URC Low voltage board 4801018 6 8 Service Manual 8200909 Cranex Panoramic X ray Series 6 10 Low voltage board component layout NOt TOOT I C11 MO x 6119 622A EZE Ezaz O 393405 m E I GE O e c HbZ 271 CZ x MS HOST e 00 cc a Q MS HOZZ ps m CC HS D g mn kr n02 MS AT N MS AT e O CC 4 6 Mains Power Unit MPU O Q Q X aC oC Low voltage board 4801018 Service Manual 8200909 6 Mains Power Unit MPU Cranex Panoramic X ray Series 6 11 High voltage board component layout AWG16 RED UL1011 15 6 10 Service Manual 8200909 Cranex Panoramic X ray Series 7 Pulse Logic Unit PLU 7 Pulse Logic Unit PLU 7 1 Exposure Logic Service Manual 8200909 The Pulse Logic Unit is located beneath the control panel It includes all the X ray generator controls protection circuits and exposure logic Voltage is supplied to the PLU bo
112. ors on the PSU Replace any that are faulty Check the operation of the PSU after replacing any of the transis tors 18 6 Service Manual 8200909 Cranex Panoramic X ray Series 18 Troubleshooting Image quality problems panoramic units The easiest way to determine if there is an operating or alignment problem is to take a ball pin exposure From the size and shape of the ball pin image oper ating malfunctions and alignment errors can be identified and then corrected For information on how to take a ball pin exposure see section 21 Aligning procedures Taking a ball pin exposure End of the image is missing partial exposure 16 1s 2 2s 3c 3s Exposure button released too early Operator error Retake the exposure if required Film microswitch activated too early Adjust position of the microswitch Back up timer not set correctly time too short Carry out a back up timer test and then set the back up timer Part of the image is in focus and part out of focus 1c 1s 2 2s Unit not correctly aligned Take a ball pin exposure to determine the alignment error Realign the unit accordingly Focal trough adjustment y movement wire is broken Replace the wire Image too light too dark or not enough contrast cassette versions only 1 15 2 25 Service Manual 8200909 Film screen incompatibility Check the film and intensifying screens being used are compatible Replace
113. ower to the Low Voltage Board which then produces auxillary voltages from this power T1 secondary coils are connected through fuses F5 and F6 to rectifiers DA and D6 and filtered with capacitors C5 C6 and C7 Relay P3 connects the supply voltage to a regulator network which then produces a filament inverter supply voltage FIV When FIV is used the position ing lights are turned off IC1 is a voltage regulator that produces a 20 V output TR1 and TR4 are used to increase the output current capability of the regulator 6 Mains Power Unit MPU Cranex Panoramic X ray Series Supply voltage for the two drive motors MD1 MD2 is derived from a 24 V transformer secondary coil Voltage from capacitor C7 AXV is supply to expo sure switch J1 6 digital display J1 6 and pulse logic board J4 7 Power to the positioning light control relay V is sup plied through the normally closed P3 contact ensur ing that the patient position lights turn off when P3 is opened When the positioning light switch is pressed it allows capacitor C11 to be charged through resis tor R12 Transistor TR3 receives base current through R13 The base current generates an emitter current which then causes the V relay to close When the V relay closes a half wave rectified D17 voltage of 12 VRMS is supplied to the patient posi tioning lights The patient positioning light bulbs are 12 V Relay V will open when capacitor C11 is discharged through
114. peed of the Cranex unit Switch S1 when in on position allows the beam alignment to be checked 16 PDC timing circuit for DM versions Cranex Panoramic X ray Series 16 2 PDC timing circuit connector signals PDC J1 26 pin ribbon cable 11 12 13 14 15 16 17 18 19 20 23 26 PDC J3 Pin 1 4 2 3 5 6 Signal MAI GND RVL BI1 RI1 RYL BI2 EXP HFB EXL PRV TH MD1 MD2 Signal 5v GND EXP Flame Description Tube current feedback from panoramic tube head Signal ground Unregulated supply 28 35 VDC Not in use Full wave rectified 20 VAC Tube head temperature signal High 24 VDC when unit in start position kV selected and tube head temperature sensor closed or TA switch on PLU board up and tube head temperature sensor closed Ready light drive High 24 VDC when unit ready for exposure Tube head temperature sensor supply High when unit in start position and kV selected or TA switch on PLU board up Exposure command High 28 35 VDC when exposure switch pressed High voltage feedback from pan tube head Exposure light drive High 24 VDC when kV over 50 P relay control High 28 35 VDC during exposure R relay control Low after preheat Supply for drive motors 24 VAC across Description 5 VDC input to the PDC timing circuit Ground input to the PDC circuit Goes up to 5v when radiation starts and starts to read the TDI profile from the PDC Goes up t
115. pin 15 which drives the protection indicator lamp IC6 pin 4 11 high indicates the protection condition When IC5 pin 5 goes high after preheating output IC5 pin 4 is dependent on output IC6 pin 4 11 If the condition still exists IC6 pin 8 goes high and latches IC6 pin 10 high Connection of IC6 pin 10 to pin 9 makes the high stay until power is switched off IC2 pin 6 is connected through divider R15 R16 R17 C7 to unregulated supply voltage AXV If AXV is too low indicating a low mains voltage IC2 pin 6 goes lower than 9 volts reference V9 on IC2 pin 5 and output IC2 pin 7 and also IC6 pin 4 11 will go high 1 pin 10 is connected to HFB signal through R18 C8 If it goes higher than 9 volts V9 indicat ing a high voltage on X ray tube 90 kV output IC1 pin 8 and also IC6 pin 4 will go high IC1 pin 5 is also connected to HFB signal Output IC1 pin 7 is controls the EXL signal through IC3 pin 10 and TR2 EXL signal is high if the tube has more than 50 kV The tube current is sensed on R75 R38 by IC17 pin 6 If the current becomes too high indicating tube arc output IC17 1 goes high and latches high on IC6 pin 10 and about IC 13 pin 4 that inhibits power inverter drive pulses 17 pin 1 is brought low by a pulse on IC17 4 through C28 R72 at power up 7 Pulse Logic Unit PLU 7 8 Motor Drive Cranex Panoramic X ray Series J1 23 24 MD1 and J1 25 26 MD2 use 2
116. pour should be allowed to disperse before switching the unit on Operating warnings and precautions The x ray unit must only be used to take dental TMJ and cephalometric optional x ray exposures It must not be used for any other purpose The unit or its accessories must not be modified altered or remanufactured in any way Repairing shall be performed by Soredex authorized service only As radiation safety and protection requirements vary from country to country and state to state it is the responsibility of the operator to ensure that all local and national radiation safety and protection require ments are met Never leave film cassettes open in daylight Daylight can damage intensifying screens Service Manual 8200909 Cranex Panoramic X ray Series 1 Introduction The use ofACCESSORY equipment not complying with the equivalent safety requirements of this equip ment may lead to a reduced level of safety of the resulting system Consideration relating to the choice shall include useofthe accessory in the PATIENT VICINITY evidence that the safety certification of the AC CESSORY has been performed in accordance to the appropriate IEC 601 1 or IEC 950 and or IEC 601 1 1 harmonized national standard Unauthorized Modifications Service Manual 8200909 Unauthorized changes or modifications to any part of the unit or its equipment can have hazardous conse quences Changes or modifications must not be made unle
117. put IC12 pin 2 goes higher than IC2 pin 1 and pulse width on output pins 8 11 begins to increase Thus the power regulator output voltage rises and also the RFB signal on IC 12 pin 1 rises following 1C12 pin 2 High voltage on tube rises also according to the power regulator output voltage and the HFB signal begins to rise IC11 pin 3 and 1 rises and follows the volt age on IC11 pin 5 Stable condition in feedback system is achieved when IC 11 pin 1 has the same voltage as IC11 pin 5 and IC12 pin 2 same as IC12 pin 1 Now the feedback system works to maintain this condition If for some reason the HFB signal is missing and IC11 pin 7 stays high RFB signal level will match the level on IC12 pin 2 and the power regulator output voltage is limited to yield approximately 85 kV on tube Service Manual 8200909 Cranex Panoramic X ray Series 7 Pulse Logic Unit PLU 7 7 PSU Protection Circuit Service Manual 8200909 Normally the PSU protection circuit is activated when the regulator voltage or inverter current are too high When the PSU protection circuit is active it will trig ger the PLU protection circuit through the HFB line The X ray generator has circuitry that inhibits or interrupt exposure if an unsafe condition exists IC6 pin 10 is normally low and when high it interrupts exposure by producing low on IC7 pin 6 and by raising EXT NOT high by low on IC8 pin 3 and indicates the condition through low on IC4
118. ration Column Z carriage Service Manual 8200909 The units consist of a column a Z carriage that can slide up and down the column and a rotating unit not Cranex C that is attached to the Z carriage The top of the column is attached to the wall with a wall bracket and the bottom of the column is free standing on a rubber foot pad The Z carriage moves vertically up and down the column and is connected by means of steel wires to a counter weight inside the column With Excel versions an electric motor at the rear of the Z carriage drives the Z carriage up and down The motor control is on the left hand side of the Z carriage With BaseX versions the Z carriage is moved up and down manually A lever on the side of the Z carriage allows the Z carriage to be locked when it is in the required position The Z carriage comprises upper and lower shelves The upper shelf holds the rotating unit and the lower shelf the patient chin rest patient positioning knob and focal trough light When the knob is turned to position the focal trough correctly the rotating unit moves simultaneously with the light The frankfort plane positioning light is attached to the left hand side of the Z carriage and the midsagittal positioning light Excel units only is under the upper shelf At the back of the Z carriage there is the mains input with fuses and the main power switch The exposure switch is connected to the rear of the Z carriage The
119. rcuit board DS component layout AJ O 100n Se C2 No d 21 Cor SS A K A A Cn e mnn on Cn gt 46 14538 J 0460241 05160431 cul N Z d cul soon S C E Rom ef ef HM L ow SEN vol oy 84 F 63 m SOREDEX Interlock 4801361 17 6 Service Manual 8200909 Cranex Panoramic X ray Series 18 Troubleshooting 18 Troubleshooting 18 1 Fuse Chart Back Bracket F1 F2 8 AT slow Main fuses for unit Power Supply F3 F4 6 3 AFF High power supply to MPU very fast Power Switching Unit AG Positioning lights FIV MPU J4 pin 6 Filament supply g F5 3 2 AT slow Rec Low voltages MPU J6 pin 3 R Relay in MPU RLV MPU J4 pin 5 Not in use PSU T1 MD1 MD2 MPU J4 pins 11 and 12 Motor Drives Timing of Partial Exposure Cont FAN 24V F6 3 2 AT slow 24V MPU J1 pin 10 Z Drive Unit Low voltages Timer for the Positioning lights DC AC DC 2 AXV MPU J1 pin 6 Exposure switch Position Display AXV MPU J4 pin 7 Pulse Logic Unit Regul 15V 24V Regul 15V 24V Exposure warning lights PDC Timing Circuit DM Or Interlock DS Mains Power Unit MPU Circuit breaker CB1 Service Manual 8200909 18 1 18 Troubleshooting Cranex Panoramic X ray Series 18 2 Problems causes c and solutions s Operati
120. res The Cranex 3 Ceph 3 and 2 5 are earlier versions of the Excel Excel and repectively but they do not include the Auto kV feature 2 Unit description Cranex Panoramic X ray Series 2 2 Main parts Excel Excel D BaseX and BaseX D Midsagittal light Excel Ceph Excel and Excel D only Mirror Upper shelf Z carriage Frankfort light Rotating unit Exposure switch Cassette carriage Excel Ceph Excel BaseX CCD sensor Excel D BaseX D al Focal trough light Lower shelf 2 2 Service Manual 8200909 Cranex Panoramic X ray Series On off switch Exposure switch lock Height adjusting key Excel Ceph D Height adjusting lever BaseX BaseX D Service Manual 8200909 2 Unit description Control panel Exposure warning lights Head support Panoramic reduced width panoramic exposure selection knob BaseX only Chin supports Patient handles Focal trough positioning knob Focal trough position Positioning display Excel Ceph light switch Excel Excel D 2 Unit description Cranex Panoramic X ray Series 2 3 Main parts Excel Ceph Cephalometric tube head Cassette holder plate l Soft tissue filter adjusting screw 2 4 Service Manual 8200909 Cranex Panoramic X ray Series 2 Unit description 2 4 Mechanical description and ope
121. ries Higher kV harder beam Higher kV lower contrast lower patient dose 10 kV increase doubles radiation output Changing mA does not change beam quality Doubling mA doubles radiation output More AL filtration harder beam More AL filtration less radiation output DC beam is harder than AC with the same filtra tion Optimum contrast in panoramic use is acquired with 69 77 kV A smaller focal spot produces sharper images Size limited by thermal loading kV mA Time Actual focal spot up to 1 5 x nominal Nominal focal spot measured in max kV and half of mA Instantaneous loading limits AC use More mA larger focal spot Gauss distribution of intensity most favourable Service Manual 8200909 Cranex Panoramic X ray Series Magnification Service Manual 8200909 24 Theory of operation Reduces scatter radiation More magnification requires smaller focal spot More magnification requires less resolution on screens Constant magnification enables measurements not in PAN In panoramic radiograph TMJ s must fit on a 30 cm film which limits magnification 24 Theory of operation Cranex Panoramic X ray Series 24 8 Service Manual 8200909 Cranex Panoramic X ray Series 25 Technical specifications 25 Technical specifications Classification Complies with IEC class type B IPX0 Complies with IEC 601 1 IEC 601 2 7 and EN 55011 standards Group 1 class B Complies with DHHS Radiation P
122. ross R38 is the same as reference across C19 If this does not hold true the pulse width will change in order to compensate for the error R69 and R70 supply base current through IC14 to filament inverter transistors R44 R45 and C17 determine the clock frequency of X ray generator It is adjusted with R45 to be 47 kHz The output of IC12 13 14 has 23 5 kHZ wave form because of an internal divider of IC s IC14 acts as master oscillator It gives frequency to IC12 and IC13 through pin 5 s which are connected together 7 5 Power Inverter Control Service Manual 8200909 IC13 operates as a controller for the power inverter transistors It works at a constant pulse width duty cycle being 9096 In case of an mA overrun pin 4 goes high and shuts down the power inverter 7 Pulse Logic Unit PLU Cranex Panoramic X ray Series 7 6 High Voltage Control Circuitry IC12 operates as a power regulator drive circuit It produces variable pulse width according to feedback signals from the power regulator output voltage RFB and high voltage HFB After preheat time the EXT NOT signal turns low turning off IC10c IC12 pin 4 drops low and output pulse width is controlled by error amplifier of IC 12 EXT NOT going low turns off also 1C10a and kV REF signal on IC11 pin 5 begins to rise in compli ance with the R61 C22 network towards value selected in kV selector IC11 pin 7 begins to rise because of input going higher than in
123. rotating unit is held in place with four 4 screws Note that you may have to turn the rotating unit to access the top two screws Upper cover Tube head side 3 The collimator cover is held in place with two screws Tube head Collimator cover 19 2 Service Manual 8200909 Cranex Panoramic X ray Series 19 Removing covers 4 The left lower cover is held in place with 4 screws The right lower cover is held in place with 4 screws Rotating unit Left lower cover Right lower cover Service Manual 8200909 19 3 19 Removing covers Cranex Panoramic X ray Series 19 2 Upper shelf cover 1 Remove the front cover first 2 screws and then the upper cover from the shelf 4 screws Upper cover Upper shelf Front cover 19 4 Service Manual 8200909 Cranex Panoramic X ray Series 20 Testing Calibrating and Adjusting 20 Testing Calibrating and Adjusting 20 1 kV mA Calibration procedure A digital multimeter DMM with a frequency counter of known accuracy is required to complete this procedure PLU boards from type 4001 8 are fitted with test points TP PKV PKV CKV CKV mA 1 Remove the control panel covers and the control panel Place lead shield over the primary slit 2 Turn TA switch to the up TEST position and check that the PRE switch is to the right in the normal ON position Both switches are on the PLU board 3 Switch the unit on 4 Selectth
124. screwing two 13 mm nuts that hold the tube head to the rotating unit 3 Remove the beam collimator from the old tube head and attach it to the replacement tube head 4 Install the new tube head and covers on the rotational drive unit casting Finger tighten the M13 mounting nuts 5 Reconnect the connectors and ground wires Check for pushed out pins 6 Calibrate the tube head see kV mA calibration procedure for information on how to do this 7T Turn the rotating unit parallel to the wall Install the fluorescent screen and an empty cassette 8 Remove the head holder and screw the align ment spike into the center hole 22 Replacing parts 10 11 13 14 15 16 17 18 19 20 21 Cranex Panoramic X ray Series Select 71 kV 10 mA compensation OFF and turn the TA switch on the PLU to the up position Remove the primary slit from the beam collima tor Take an expose and adjust the focal trough adjustment so that the image of the alignment spike is in the center of the fluorescent screen Turn the rotating unit 180 degrees Make sure that the Y movement stays the same Take a second exposure The image of the alignment spike shadow may be offset on the fluorescent screen Adjust for half of the offset by moving the tube head towards the error Adjust the other half by adjusting the focal trough Turn the rotating unit 180 degrees and verify the adjustment Repeat if necessar
125. sensor and flat cable from the rear of the CCD sensor assem bly Flat cable to Remote Module CCD sensor CCD sensor assembly 5 Attach a new CCD sensor to the rear of the CCD sensor assembly Route the flat cable through the unit and connect it to the remote module Reconnect the trigger cable to the CCD sensor 6 Reattach the CCD assembly to the unit Calibrate the new CCD sensor and then check the beam alignment Refer to the DS installation appendix Replace all the covers 22 14 Service Manual 8200909 Cranex Panoramic X ray Series 23 Yearly check 23 Yearly check Service Manual 8200909 Once a year an authorized service technician must carry out a full inspection of the unit During the inspection the following test and checks MUST be carried out akV mA test aceph exposure time test ceph units only abeam alignment test a ball pin test a check to see that the safety ground is con nected acheck to see that the positioning lights operate a check to see that the tube head is not leaking check to see that the cassette carriage roller is not worn or damaged cassette versions only a check to see that all covers and mechanical parts are correctly secured and have not come loose 23 Yearly check Cranex Panoramic X ray Series 23 2 Service Manual 8200909 Cranex Panoramic X ray Series 24 Theory of operation 24 Theory of operation 24 1 Working principles o
126. side the center of the layer the magnifi cation factors in these two dimensions will be un equal This results in distortion effects If three planes are cut out from the layer at different object depths the images of objects in these planes will exhibit different proportions The plane at the center of the layer is correctly depicted The plane posi tioned toward the rotation center of the beam will be magnified more in the horizontal than in the vertical dimension and will appear too wide The plane positioned toward the film will be diminished more in the horizontal than in the vertical dimension and will appear too narrow The preceding considerations imply that teeth positioned between the center of the layer and the film appear narrow This indicates that the patient has been positioned too far forward during the exposure Similarly teeth positioned between the center of the layer and the rotation center of the beam appear wide This indicates that the patient has been positioned too far back during the exposure UNSHARPNESS The film is given a speed which matches the pro jected speed of points lying in a selected curved plane As a result these points will be sharply de picted on the film The projection of object points outside the sharply depicted plane either toward the rotation center of the beam or toward the film will have a different projected speed at the film plane than the film itself As a result the projection of
127. sition 7 NC Service Manual 8200909 4 1 4 Microswitches Cranex Panoramic X ray Series 4 2 Rotating unit microswitches Drive gear Compensation cam Start Be position Rotating unit microswitches viewed from below Start START microswitch connects to PLU J8 Pin Signal Description 6 NC Closed when rotating unit is in start position Enables ready condition Stops return movement 7 C Cephalo 1 CEPH 1 microswitch connects to PLU J8 Pin Signal Description 8 C Open when rotating unit is in the CEPH position parallel to wall Stops rotation when it reaches the CEPH position inthe CEPH mode 9 NC 4 2 Service Manual 8200909 Cranex Panoramic X ray Series 4 Microswitches End END microswitch connects to PLU J8 Pin Signal Description 1 Opens when the rotating unit reaches the end position This is a safety function to stop an exposure In normal operation the microswitch is closed until the rotating unit reaches the end position the film microswitch stops the exposure when the cassette comes to the end position 2 C Density DENS microswitch connects to PLU J10 Pin Signal Description D1 C Opens in middle of exposure if compensation is selected DENS increases the mA in middle of an exposure D2 NC Service Manual 8200909 4 3 4 Microswitches Cranex Panoramic X ray Series 4 4 Service Manual 8200909 Cranex Panoramic X ray Series 5 Capacitor Board 5 Capacitor Board
128. ss specifically authorized by Soredex When properly assembled with a compatible beam limiting device the diagnostic source assembly will fully meet the United States of America Federal Performance Standards for Diagnostic X Ray Sys tems and their Components 21 CFR 1020 30 32 provided no components or parts are removed from the unit and no unauthorized adjustments are made to the beam limiting device or tube housing assem bly Never remove or remanufacture any part of the tube head assembly or beam limiting device unless under the direction of Soredex or their authorized distribu tor Never adjust any part of the beam limiting device unless under the direction of Soredex or their author ized distributor 1 Introduction Disposal Disclaimer Cranex Panoramic X ray Series At the end of the useful working life of the equipment and or its accessories make sure that you follow national and local regulations regarding the disposal of the equipment its accessories parts and materi als The equipment may include some or all of the follow ing parts that are made of or include materials that are non environmentally friendly or hazardous batteries x ray tube head Pb Be and mineral oil all electronic circuit boards column counter weight Pb cassettes Pb intensifying screens and imaging plates Soredex shall have no liability for consequential damages personal injury loss damage or expense directly
129. the power section with a grounded oscilloscope Pre heat Exposure DCV ACV DCV ACV DCV 0 5 11 14 15 19 11 14 19 22 0 5 0 1 6 10 13 14 19 0 5 8 10 19 21 8 11 19 20 12 Power Switching Units PSU Cranex Panoramic X ray Series 12 11 Power transistor verification 47601 This procedure will reveal faulty power transistors in the PSU Use diode range to get correct readings Look at the transistor so that the pins are pointing towards you and are closer to the top hole Base B is left pin Emitter E is the right pin and Collector C is the case If one test fails the transistors must be replaced BUY 69 A or equipvalent in Power Regulator Red Led Black lead Reading if OK B left E right 0 4 0 8 left 0 4 0 8 right BUT15 MJ10009 MJ10014 ST10014 or equivalent Darlingten transistor Red Led Black Led Reading if OK B left E right Not short B left C case 0 4 0 8 case right right 0 4 0 8 If your DMM does not have diode range resistor range 200 kOhm will give 20 50 kOhm reading rather than 0 4 0 8 12 10 Service Manual 8200909 Cranex Panoramic X ray Series 12 Power Switching Units PSU 12 12 Power switching unit connector signals 47601 PSU J3 Above panoramic tube head Pin Signal Description 1 3 FP1 Filament transformer drive High 20 FP2 VDC 32 VAC during exposure 2 FIV Fil
130. the ten counter IC3 4017 the Darlington transistor circuit IC6 2003 and NAND IC7 When the button is pushed IC7 pin 13 is connected to 15V This causes the oscillator circuit which is comprised of NAND IC7 to start and IC3 receives the clock signal pin 14 The counter IC3 starts to step if reset pin 15 is 0 The outputs of IC3 Q0 Q1 are rise to state 1 one by one IC6 converts all the inputs to state 0 Stepping continues as long as the corresponding output is activated In consequence when pin 13 of IC7 changes to 0 state the oscilla tor and counter stop The corresponding output of pushed button remains in the 1 state and lights up the LED by IC6 The selected output IC3 Q0 Q6 also activates the corresponding selecting switch from 4 or IC5 which causes selection of the de sired program output of IC2 DO D1 Bits 6 and 7 of IC2 drive the cassette and rotating motors When bit 7 is in 1 state relay RL1 is closed and when bit 6 is in 1 relay RL2 is closed Signal connection ensures that the partial exposure logic can not operate when cephalometric operation is selected The PEC is connected to the PLU trough IC8 socket in the PLU and IC8 is transferred to the PEC IC10 Switches SW1 SW7 and LEDs D1 D7 are located in control panel which is mounted at the top of PEC board Locations of previous versions buttons and LEDs are also present in PEC board of maintenance purpose 8 Partial Exposure Con
131. troller PEC Cranex Panoramic X ray Series 8 9 Lengths of exposured areas using the PEC DU y OL g Normal width panoramic X ray Reduced width X ray for children Temporomandibular joints first exposures Temporomandibular joints second exposure Left side of the panoramic X ray Right side of the panoramic X ray Middle part of the panoramic X ray 265 mm 5 235 mm 5 2 x 70 mm 5 2 x 70 mm 5 150 mm 5 150 mm 5 100 mm 5 Service Manual 8200909 Cranex Panoramic X ray Series 8 Partial Exposure Controller PEC 8 10 Partial Exposure Controller PEC Connectors PEC J1 Connected parallel to 26 pin Pin Signal Description 2 3 4 6 GND Signal ground 5 78 AXV Unregulated supply 28 35 VDC 23 24 MD1 Supply for drive motors 20 VAC 25 26 MD2 Clock signal for IC1 PEC J2 Connects PEC IC10 to PLU IC8 Pin Signal Description 3 GND Signal ground 4 5 6 8 No special action in PEC circuit Connections only 9 12 13 replace IC8 functions in PLU 15 16 4 Start signal for Rising up when F micro switch in cassette carriage changes the state at the beginning of movement 10 PRE Driving the PRE signal pre heating of tube filament in PLU Rising up 15VDC 1 sec before radiation 11 EXT Driving the EXT signal in PLU Up 15VDC during radiation 14 Reset signal for PEC Low when exposure button pressed PEC J3 Pin Signal Description Securing that PLU logic can
132. ue to movement humidity the person s clothing and the conductivity of the floor If anyone charged with static electricity touches a electronic component the static electricity will discharge through the component and can damage or destroy it Note that components damaged by electrostatic discharge can fail at a later date When servicing the unit take proper precautions to avoid electrostatic build up and discharge ESD Follow the recommendations for the prevention of ESD that are used in the country in which you are working If no recommendations are available follow the guide lines below 1 Introduction Explosion Hazard Cranex Panoramic X ray Series Before handling any electrical parts or components make sure that any static electricity charge that has built up in you body is discharged When handling electrical parts or components use an elasticated wrist wrap which is connected to a ground point through 1 Mohm current limiting cable ground point use water pipes radiators or other objects that are known to be connected to the ground Also use a cable to connect the unit to the same ground potential as the wrist wrap If an antistatic mat is used connect the wrist wrap to the carpet and the carpet to the ground potential Wash the wrist wrap and check that it is good condi tion frequently Certain disinfectants and cleaning agents may vapor ize to form an explosive vapour If such chemicals are used the va
133. wheel or gear track is dirty or damaged broken tooth 5s Clean if dirty replace relevant parts if broken 6c The cam pin on top trim cover of rotation unit is not in the slot 6c Reposition the pin so that it is in the slot 18 8 Service Manual 8200909 Cranex Panoramic X ray Series 18 Troubleshooting The length of the image exposed area in not correct 1c 1s 2 2s 3c 3s The cassette carriage is not moving at the correct speed Check and if necessary adjust the speed of the cassette carriage The cassette carriage drive wheel is not in proper contact with the roller Check that cassette drive wheel makes proper contact with roller The FILM microswitch and or the END microswitch are out of adjust Readjust the positions of the microswitches The middle balls on the ball pin image are oval and not round 1c 1s 2c 2s The focal trough is not correctly aligned in relation to the rotating unit Check and if required realign the focal trough The profile follower is broken or is not in proper contact with the lower profile Replace the profile arm assembly if the follower is broken and reposition the follower if not in proper contact with the lower profile DM and DS digital versions 1c 1s The CCD sensor has not been calibrated correctly Refer to the separate calibrating instructions supplied with the DM and DS versions of the unit Service Manual 8200909 18 9 18 Troubleshooting Cranex Panor
134. y The focal spot rotation centre and secondary slot are now on the same center line Tighten the tube head securing screws and replace the primary slit to the beam collimator Remove the alignment spike Replace the primary slit Adjust the beam colli mator See Checking the position of the pano ramic beam in the Installation Manual Remove fluorescent screen and push the TA switch to the down position Carry out a ball and pin test to check the align ment See section 7 Aligning Procedures in this manual Replace covers Service Manual 8200909 Cranex Panoramic X ray Series 22 Replacing parts 22 8 Replacing the Cephalometric Tube Head When replacing the cephalometric tube head follow the same procedure as used when changing the panorama tube head After the cephalometric tube head has been re placed the following procedure MUST be carried out a kV mA calibration procedure b Cephalometric beam alignment test See section Aligning the cephalostat in the Cranex Installa tion Manual 22 9 Replacing the Position Display Assembly The display board can be replaced by removing the top cover from the lower shelf After the board has been replaced the position display must be reset See section 20 Testing Calibrating and Adjusting Calibrating the positioning display in this manual 22 10 Replacing Z Driver Unit Board Excel units only The driver board can be detached by removing the
135. y Series 12 Tighten wheel holding axle gt As AC 7 Over and around wheel 8 Over right hand wheel 9 Under right hand wheel 10 Over top of roller round once exit from top 11 Route wire stud furthest from column Pull wire tight with pliers and rotate adjusting knob to remove slack Secure wire in position 22 8 Service Manual 8200909 Cranex Panoramic X ray Series 22 Replacing parts 22 13 Replacing z carriage brake pads BaseX Only 1 Lock the counter weight in place with counter Counterweight weight pin 2 Turn the brake lver to the downwards position to release the brake Remove the brake lever and then the cover from the left hand side of the z carriage Left hand z carriage cover Brake lever Service Manual 8200909 22 9 22 Replacing parts Cranex Panoramic X ray Series 3 Remove the brake assembly and slide out the brake pads and replace them with new ones Brake assembly 4 Reassemble in reverse order 22 10 Service Manual 8200909 Cranex Panoramic X ray Series 22 Replacing parts 22 14 Replacing the cassette carriage roller 1 Remove the left hand cassette carriage end If it is a BaseX unit remove the adult child selec tion knob first 2 Lift the cassette carriage motor up slightly and then side out the cassette carriage roller 3 Pull out

Service Manual Cranex Dental Panoramic X-ray

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