SERVICE MANUAL
Contents
1. 20 70 C 10 90 500 1060 hPa 27 Environmental condition for 10 40 C 30 75 700 1060 hPa 28 Rotation angle of head i etc ERE Horizontal 0 600 Vertical 0 300 20 Service 10 Years 2 PHYSICAL DIMENSIONS WK Type 5 5 8 142 600 2 1 4 3 3 16 58 31 1 2 800 4 Max 46 7 8 1190 80 Stroke 43 5 16 1100 1 eg 25 2 0 a o Ame 2 73 1 8 1857 1 1 1 1 Cabinet Frame 6 N 7 5 9 8 805 9 i ee r 80 5 to 5 Si t 1 Y 6 3 16 157 B MER id 7 15 16 38 5 16 973 1 226 L 39 3 16 995 1 2 ioii 48 5 16 1243 260 SSD Source to Skin Distance a Regular cone 8 inches 203 mm b Long cone 12 inches 305mm SSD 195 mm Fig 1 Dimensions E 1 2 300 _ Max1190 4 80 Max1190 4 80 Stroke 1100 Stroke 1100 e I x e I 5 gt gt Sub Controller2. 3 ADJUSTMENT OF TUBE CURRENT Tube current at beginning of exposure can be adjusted by h xx setting and tube current at stabilized portion of exposure can be adjusted by e xx setting If tube current is checked by auto mode as mentioned on page 20 and if tube current is out of range successive exposure sets h xx and e xx to adequate value automatically If tube current is checked by manual mode as mentioned on page 20 h xx and e xx should be adjusted manually as follows 1 MANUAL SETTING METHOD FOR h xx Check tube current at beginning of exposure by manual mode as page 16 If tube current is out of the range of 0 5 mA from the rated current perform following adjustment Turn on the main switch 3 Keep depressing P patient C cone F film button until h xx is displayed on the exposure time window 4 Select the tube current that should be adjusted 5 If tube current is lower than 0 5 mA at step 1 press A switch next to the exposure time display window and h xx value displayed will be increased If tube current is higher than 40 5 mA press W switch and decrease the h xx value displayed has 32 kinds of values 000 1F Next to 9 is A and consequently F equals to 15 O D 6 Press the patient switch to memorize the h xx value displayed to the memory If value is stored electronic chime will should twice 7 Turn off the main switch and check the tube current at beginning of exposure again If tube curre
3. 15 and any two of them can be programmed for easy selection If the doctor uses a different film speed or prefers darker or lighter radiographs the new speed can be programmed as follows Higher speed settings make films darker If film speed is increased by 1 exposure time becomes 25 longer 1 Keep the 4mA selection switch and 7mA selection switch depressed simultaneously for more than 3 seconds Release the switches if the ready light starts to flash 2 Push F switch momentarily until the a light above the F switch illuminates The exposure time display window shows the present film speed for a setting The factory default setting F 09 should be displayed By depressing Q switch increase or decrease film speed number until desired number for a setting is displayed 3 To change the b setting from the factory default 05 push switch momentarily until the b light illuminates By depressing 5 or Q switch increase or decrease film speed until the desired number for b setting is displayed 4 Press T1 switch to store these settings then turn the main power switch off B SPEED FOR DIGITAL IMAGING BELRAY II 097 x ray has 16 speeds for digital imaging d 00 4 15 The factory setting is d 06 and with this setting the exposure time becomes half of F 06 setting As the sensitivity is different according to each manufacturer of digital imaging sensors this setting should be adjusted To get a darker im
4. 2 MECHANICAL INSPECTION 1 ARM ASSEMBLY 1 Incorrect leveling of the wall plate and wall bracket can cause arm drift First check leveling with horizontal arm in position 1 FIGURE 5 If not correct bracket must be adjusted by placing shims behind the wall plate IMPORTANT If the end of the horizontal arm shown in position 1 is pitched below level then the tube head will drift away from the wall If the end of the horizontal arm in position 1 is pitched above level then the arm will require only minimum adjustment of the brake screw 2 Check leveling in position 2 if not correct adjust Horizontal Arm as follows FIGURE 5 Arm a Slightly loosen two top mounting bolts for arm mounting bracket b Shift the bracket left or right until the arms are accurately leveled c Move the horizontal arm to position 1 d Fully tighten two top mounting bolts Top Mounting e Fully tighten bottom mounting bolt Bolt Bottom Mounting Bolt FIGURE 5 NOTE Slight tendencies to drift can be corrected by tightening brake screw in horizontal arm Do not tighten beyond what is required to AI prevent drift Loosen 2 BALANCE ARM TENSION ADJUSTMENT es 1 Place the balance arm assembly into position Balanca 2 If either balance arm drifts higher or lower from Arm Tighten the set position remove the spring adjuster cover Spring Adjuster and adjust the bal
5. n Sub Controller Y Max1000 270 1300 270 3 as S 28 25 2 a Main Controller Q 5 A o O8 00 0 300 1190 80 Stroke1100 2 be 2300 S hos 506 270 S 5 300 x Main Controller S g 8 os gt e 270 T 70 m 5 S g eo gt E 72 A Fig 1 6 Dimensions Ae 3 TUBE HEAD THERMAL CHARACTERISTICS A Interval between each exposure The temperature inside of the tube head rises when an exposure is made The value of the heat generated is measured in Heat Units HU which is the product of tube potential tube current and exposure time Excessive heat will accumulate inside of the tube head if the x ray is used without a proper cool down interval between each exposure The excessive heat may damage the x ray tube high voltage generator or both B Duty cycle A cool down interval of 50 seconds or more must be allowed between each 1 second exposure a 25 second cool down must be allowed between each 0 5 second exposure This will avoid the accumulation of excess heat and prolong the tube head life C Tube head cooling
6. terminal L and N of terminal block in the control box 25 If line voltage is close to 110 of the rated voltage but less than 110 set PC x to PC 1 Press 2 3 4 and power switch for PC x setting mode MEANING E 04 Excess line current during exposure POSSIBLE CAUSE a Tube head is internally shorted CHECK POINT Disconnect the tube head and make an exposure SOLUTION If E 07 comes the tube head may be defective Change the tube head b Cables between the control box and head are short circuited If E 04 still comes when the tube head is disconnected disconnect the wires from the power PCB CN4 and CN5 and make an exposure If E 07 comes cables between the control box and head may be short circuited Find the defective portion and correct it c Power PCB is defective Disconnect the wires from power PCB 4 and CN5 and make an exposure If E 04 still comes power PCB may be defective Change the power PCB Tube current of the last pulse is less than 3mA at 4mA setting or less than 5 25mA at 7mA setting AVR voltage is too low Measure the voltage between TP2 and JP3 2 on the power PCB when the exposure switch is pressed in the Adj mode Press P T2 T3 for Adj mode If the voltage is out of range of 180 1 Vac adjust the voltage to 94 5Vac by VR1 on the power PCB After adjustment tube current confirmation should be done Measure the
7. 09 4 0 20 0 32 0 40 0 50 0 80 0 32 0 50 0 63 0 80 1 25 0 40 0 63 0 80 1 00 1 60 7 0 10 0 20 0 20 0 32 0 40 0 20 0 32 0 40 0 50 0 63 0 20 0 40 0 40 0 63 0 80 04 4 0 08 0 13 0 16 0 20 0 32 0 13 0 20 0 25 0 32 0 50 0 16 0 25 0 32 0 40 0 63 7 0 05 0 08 0 10 0 13 0 16 0 08 0 13 0 16 0 20 0 32 0 10 0 16 0 20 0 25 0 32 au 4 0 06 0 10 0 10 0 16 0 20 0 10 0 16 0 20 0 25 0 40 0 10 0 20 0 25 0 32 0 40 1 0 03 0 05 0 06 0 08 0 13 0 05 0 08 0 10 0 13 0 20 0 06 0 10 0 13 0 16 0 25 TABLE 2 Speed Setting and Exposure Time Long Cone unit sec Speed Child Adult Obese Setting ms 1 T2 T3 T4 T5 1 T2 T3 T4 T5 1 T2 T3 T4 T5 F09 4 0 40 0 63 0 80 1 00 1 60 0 63 1 25 1 25 2 00 2 50 0 80 1 25 1 60 2 00 3 20 T 0 25 0 40 0 50 0 63 1 00 0 40 0 63 1 80 1 00 1 60 0 50 0 80 1 00 1 25 2 00 F04 4 0 16 0 25 0 32 0 50 0 63 0 25 0 50 0 50 0 80 1 00 0 32 0 50 0 63 1 00 1 25 7 0 10 0 16 0 20 0 25 0 40 0 16 0 25 0 32 0 40 0 63 0 20 0 32 0 40 0 50 0 80 4 06 4 0 13 0 20 0 25 0 32 0 50 0 20 0 32 0 40 0 50 0 80 0 25 0 40 0 50 0 63 1 00 7 0 06 0 13 0 13 0 20 0 25 0 10 0 20 0 25 0 32 0 40 0 13 0
8. 25 0 25 0 40 0 50 13 4mA Selection Switch By momentarily depressing this switch the tube current is set at 4mA When Film switch is depressed the tube current setting will be automatically changed to 7mA 14 7mA Selection Switch By momentarily depressing this switch the tube current is set at 7mA When Digital switch is depressed the tube current setting will be automatically changed to 4mA 15 Patient Size Selection Switch This switch alters the selection of patient type size to be radiographed child gt adult Obese child and sets the exposure time automatically NOTE Setting or adjusting the exposure time manually with or switch supersedes 5 15 functions 16 Exposure Time Display Window This window displays the selected exposure time If an abnormal condition exists or a malfunction occurs an Error Code is displayed See Section 6 ERROR CODE 17 Exposure Warning Light Illumination of this light indicates the unit is producing x radiation 18 Exposure Switch This switch initiates radiographic exposure When making an exposure depress and hold this switch unit the Exposure Warning Light 17 and the audible warning shut off Failure to keep this switch depressed will result in the premature termination of the exposure and error code E 00 will be displayed in Exposure Time Display Window 16 3 OPERATING PROCEDURES 1 Turn ON the Main Power Switch 1 2 Confirm that Ready L
9. Switch Depressing this switch for more than 2 sec selects the cone type 8 standard cone or 12 optional long cone If the optional rectangular cone is to be used select the 8 cone setting 11 Film Speed Selection Switch BELRAY II has 16 film speed settings 00 F 15 Two speed settings are pre set at the factory a amp b and can be selected with 11 a Film speed No E09 equivalent to ISO speed group D or Kodak Ultra Speed film b Film speed No F 04 equivalent to ISO speed group F E or Kodak InSight film b Pushing this switch momentarily displays the selected film speed setting in the Exposure Time Display Window 16 Depressing this switch for more than 2 sec changes the film type being selected c If the Digital Imaging Switch 12 is depressed both of the film speed indicating light a amp b are turned off 12 Digital Imaging Switch If a digital imaging system is used shorter exposure time is often required BELRAY II has 16 speeds for digital imaging 4 00 4 15 Pushing this switch momentarily displays the speed being selected in the Exposure Time Display Window 16 With the factory speed setting d 06 the exposure time becomes half of F 06 setting 7 TABLE 1 Speed Setting and Exposure Time Regular Cone unit sec Speed Child Adult Obese Setting dus Ti T2 T3 T4 T5 1 T2 T3 T4 T5 1 T2 T3 T4 T5 F
10. Turn on the main power switch 2 Depress the tooth selection switches T1 T4 and T5 together until 4mA light blinks 3 Exposure time 0 50 is displayed and ready light is on If not turn off main power switch and repeat step 2 Then release 1 4 and 5 switches 4 Make an exposure by depressing the exposure switch ZAWARNING X RADIATION IS GENERATED FOR 0 5 SECONDS 5 If h XX and e XX are displayed alternately after the exposure leave the unit for about 30 seconds until the display returns to 0 50 Then make another exposure again 6 If Fin is displayed at the exposure time display window tube current at the beginning of exposure and tube current at the stabilized period of exposure are within the specifications for both 4mA and 7mA 7 Repeat step 5 until Fin is displayed b Manual mode Model 097 x ray has the function displaying the tube current of the first pulse and the last pulse of the exposure at the exposure time display window this function the tube current at the beginning and at the stabilized portion of the exposure can be measured 1 Power on the control box 2 Set the exposure time at 0 5 seconds by the manual adjusting switch next to the exposure time display window 3 Make an exposure and keep the exposure switch depressed even after the exposure is over Press the mA selection switch either 4 mA or 7 mA 4 tooth light comes on and tube current of the first pulse of the exposur
11. curve 1 Tube housing cooling curve 2 Anode thermal characteristics 250 4500 150 2500 2000 Heat Storage kH U Heat Storage J 1500 50 1000 500 0 20 40 60 80 100 120 140 Time in Minutes Time S 3 Maximum rating chart 20 aal EM TIT Nill D 1 L 1 Tube Current mA Exposure Time S SECTION 2 OPERATION INSTRUCTIONS 1 LAYOUT OF CONTROLLERS 544 PPP DE AJL J J 3 BEL 7OkVp 4 7MA 4 A 9 V v 8 9 8 7 17 2 18 Fig 2 Major Components and Control Identification 1 Main Power Switch 10 Cone Type Selection Switch 2 Ready Light 11 Film Speed Selection Switch 3 Exposure Time Adjusting Switch Down 12 Digital Imaging Switch 4 Exposure Time Adjusting Switch Up 13 4mA Selection Switch 5 Tooth Selection Switch T1 14 7mA Selection Switch 6 Tooth Selection Switch T2 15 Patient Size Selection Switch 7 Tooth Selection Switch T3 16 Exposure Time Display Window 8 Tooth Selection Switch T4 17 Exposure Warning Light 9 Tooth Selection Switch T5 18 Exposure Switch 12 FUNCTION OF CONTROLS 1 Main Power Switch Pushing the upper side of this switch to the ON position energizes the x ray unit Ready lig
12. of E 05 b Cables between the control box and head are broken or mis wired Check each cables for continuity and Mis wiring Correct the cable c Power PCB is defective If all cables are OK and AVR voltage cannot be adjusted to 180Vac or TP2 and TP3 voltage cannot be adjusted to 7 30 Vac power PCB may be defective Change the main PCB and check AVR voltage or TP2 TP3 voltage again d Defect of tube head Internal short If AVR voltage and cable are all right then tube head may be defective Change the tube head and confirm the function again Malfunction of the micro computer Memory setting for lower limit of line voltage is higher than the higher limit of line voltage Check the L xx value and H xx values in the line voltage limit setting mode Press 1 3 5 and power switch for this mode If L xx is higher than H xxx adjust these settings Refer to the solutions for possible cause c of E 02 and 03 If these values cannot be adjusted display PCB may be defective Exposure switch or exposure Switch circuit is ON when main power switch is turned ON Exposure switch or the coil cord for exposure switch is defective Turn off the main switch and disconnect form the timer PCB Turn on the main switch again If E 10 does not appear change the exposure switch or coil cord for exposure switch If E 10 still appears change the timer PCB Tube curre
13. t appear in the tube current confirmation mode P 19 of installation manual AVR voltage is too high or too low Measure the voltage between TP2 and JP3 2 on power PCB when the exposure switch is pressed in the Adj mode Press 2 3 for Adj mode If the voltage is out of range of 180 1Vac adjust the voltage by VR1 After adjustment tube current confirmation should be done If the voltage is within the range set final h xx and values manually Press and power Switch for manual setting mode 2 AVR voltage cannot be adjusted to 94 5 Vac in the Adj mode a Cables between the control box and head are broken or mis wired If AVR voltage is staying around line voltage cables may be broken especially 3 and 5 cables Correct the cable b Power generating PCB or timer PCB is defective If cables are OK either PCB may be defective Change the power PCB first and if AVR voltage still cannot be adjusted change timer PCB 3 Exposure does not start when exposure switch is depressed a Exposure switch is defective Disconnect CN2 from timer PCB and short the terminal 1 and 3 of CN2 instead of pressing the exposure Switch If exposure can be made exposures switch is defective Change the exposure switch b Exposure time setting is 0 00 Check the exposure time display window Press a tooth switch or manual setting switch for exposure tim
14. DENTAL X RAY ISELRAY II 097 SERVICE MANUAL for 220V 230V 240V INDEX SECTION 1 TECHNICAL DATA page 1 ELECTRICAL AND RADIATION 2 PHYSICAL DIMENSIONS 3 TUBE HEAD THERMAL CHARACTERISTICS TITIIITITITITITITITITITITITIIITS SECTION 2 OPERATION INSTRUCTION 1 LAYOUT OF CONTROL BOX 2 FUNCTION OF CONTROLS TITELEETELEETTEEETEEEETEEEEETEEETTEEEETEEEETT T I 3 OPERATING PROCEDURES TIITIITTTITLETETTTTETETTTTTETETETTTTTTTETTTTTS 4 OPTIONAL HAND EXPOSURE SWITCH ITITITITIIITITITITITIITITIITITITTIIITITP 5 ALTERATION OF SETTING MNO SECTION DESCRIPTION FOR FUNCTIONS 2 AUTOMATIC VOLTAGE REGULATOR 1 3 PRIMARY CIRCUIT OF HIGH VOLTAGE TRANSFORMER 116 4 PRIMARY CIRCUIT OF FILAMENT TRANSFORMER O17 5 AUTOMATIC TUBE CURRENT CONTROL n07 SECTION 4 ADJUSTMENT 2 INSPECTION OF TUBE CURRENT TTTTTTTTTTITTTTTTTTTTTITTTITTTITTTITTTTTTPO 3 ADJUSTMENT OF TUBE CURRENT Ne 4 ADJUSTMENT OF LINE VOLTAGE MEASUREMENT ERROR IIIIIIIIIIIIIITIIP2 SECTION 5 PERIODIC INSPECTION AND ADJUSTMENT 1 ELECTRICAL INSPECTION AND ADJUSTMENT O 2 MECHANICAL INSPECTION TITILETEETTETTEETELET ETT LETT EET ETLET ETE LETT TET SECTION 6 ERROR CODE TTITITITEELTETETEEETETETEEETEEE EET EET ET EE LET TETTE SECTION 7 TROUBLE SHOOTING TTTITITTTITTT
15. OLTAGE REGULATOR 1 Belray 097 is equipped with the automatic voltage regulator AVR in the control box Purpose for this function is as follows a As the line voltage fluctuation including voltage drop during exposure is absorbed stabilized voltage is supplied to the high voltage transformer and filament transformer As a result output x radiation is highly stabilized b If auto transformer is used to compensate the voltage fluctuation there always exists some voltage error because of stepping adjustment AVR in Belray II 097 is using Field Effect Transistor to adjust the voltage so no voltage error exists principally c When line voltage fluctuates in case of auto transformer operator must adjust the voltage by changing the tap of transformer AVR circuit adjusts the voltage automatically and requires no operation to user d The outer dimension and weight of control box can be reduced by eliminating a heavy auto transformer 2 Block diagram of AVR circuit is described in FIGURE 3 3 Power FET field effect transistor controls the AVR voltage as the voltage of reference sine wave and the voltage divided from AVR output becomes the same value and the same wave form 4 Output voltage of AVR is 180 1 Vac at 7 mA setting M FET FI ELD EFFECT TRANSI SI TCR 9 FIGURE 3 Block diagram of AVR circuit 3 PRIMARY CIRCUIT OF HIGH VOLTAGE TRANSFORMER 1 Back reducer parallel circuit of resistor and dio
16. T ERROR Line voltage is monitored by micro computer and if it is out of the operable range 90 100 of the rated voltage the ready lamp on front panel becomes off and exposure is inhibited The form of line voltage is a sine wave Since the peak voltage of this sine wave is converted to measurable voltage and apply to micro computer there exists a measurement error if the wave form is not perfect sine wave If measured RMS Root Mean Square voltage of power line by a precise multimeter is within the range of 90 100 of the rated line voltage but the ready lamp on front panel doesn t come up measured voltage by micro computer can be shifted 3 96 as follows l 2 3 Turn on the main switch Keep depressing 2 and 4 switches until Pc x is displayed on the exposure time window Meaning of Pc value is as follows Pc 0 No compensation is applied lt initial setting from factory Pc 1 Measured voltage by micro computer is decreased by 3 Pc 2 Measured voltage by micro computer is increased by 3 If multimeter indicates 107 110 of rated line voltage and ready lamp doesn t comes on set to Pc 1 by depressing A switch next to the exposure time display window If multimeter indicates 90 93 of the rated line voltage and ready lamp doesn t comes on set to Pc 2 by depressing A switch next to the exposure time display window After the display becomes suitable value press the patient s
17. TTTTTTTTTTTTTTTTTTTTITTTITITIT 7 SECTION 8 REPLACEMENT OF COMPONENT 1 CONTROL BOX TIITETELTEEETTETEETETETETEETETEEEEEEETET EE TET ETT EE LITE 29 SECTION 9 CIRCUIT DIAGRAM SECTION 1 TECHNICAL DATA 1 ELECTRICAL AND RADIATION DATA 1 Nominal focal spot value 2 Rated peak tube potential 3 Rated tube current 4 Maximum rated peak tube potential 5 Rated Line Voltage Minimum Line Voltage Maximum Line Voltage Rated Line Power Momentary rating Rated Line Current at 7mA Maximum Line Current at 7mA Internal Resistance Range of Line Voltage Regulation 6 Power line frequency 50 60Hz Single Phase 7 Line power Long term rating 12VA 8 Exposure time 0 02 3 2 sec ON and OFF are zero croseed 9 Timer ACCURACY 1 pulse 1 50 sec or 1 60 sec 10 Inherent filtration 1 7 mm AI Equivalent 11 Added filtration 0 5 mm Al 12 Minimum filtration permanently in useful beam 2 2 mm Al Equivalent at 70 kV peak 13 Nominal roentgen output 4mA 7 Distal end of regular cone 4 2mGy sec 7 1mGy
18. UBE CURRENT 1 If the tube current of certain pulse measured by micro computer is lower than the rated value 4mA or 7mA the off period of the transistor of next pulse is decreased Shorter off period makes the output voltage for filament increased and as the result tube current is increased 2 If measured tube current is higher than the rated value off period of next pulse is increased Longer off period makes the output voltage for filament decreased and as the result tube current is decreased 3 This feed back control for filament is used during the exposure only During pre heating period output for filament transformer is constant because no tube current is fed back 17 SECTION 4 ADJUSTMENT 1 AVR VOLTAGE Output voltage of Automatic Voltage Regulator circuit can be measured and adjusted as follows If AVR voltage has been adjusted tube current must be adjusted after that 1 Prepare a digital multimeter capable to measure 200 Vac with 1 or more accuracy 2 Turn off the main switch Set the suitable range of digital multimeter to measure 200 Vac 3 Open the front panel of the main controller and place one lead of multimeter to JP3 2 on the power PCB and other lead of multimeter to TP2 a wire ring test terminal on the power PCB Refer to FIGURE 4A 4 Turn on the main switch on the main controller 5 Depress the T2 T3 and P patient switches on the sub controller simultaneously until the letters Adj appears in th
19. VOLTAGE IN STEP 5 IS TOO HIGH AND HEAD WILL BE DAMAGED 5 Voltage reading should be within the range of 7 28 7 32 Vac at 7mA setting 6 If the voltage is out of this range then adjust 1 a pot near the TP3 test terminal very slightly to make the voltage reading within 7 28 7 32 Vac 097P PW00 1 FIGURE 4B 2 and on the Power Generating PCB 19 2 INSPECTION OF TUBE CURRENT Belray 097 has two types of self measuring function for tube current 1 auto mode and manual mode Tube current can also be measured directly by multimeter In auto mode both tube current at the beginning and stabilized period of exposure are checked and adjusted automatically although the values of tube current are not displayed In manual mode the value of tube current is displayed at the exposure time display window but additional operations are necessary to adjust the tube current In case of two methods mentioned above tube current is measured by the micro computer on the power generating PCB Last method is direct measurement of voltage Tube current is converted into voltage by resistor R37 and R38 totally 5000 on power generating PCB The voltage across these resistor becomes 3 5 Vdc when tube current is 7 mAdc In this method the tube current only at stabilized period of exposure can be measured Auto mode is recommended for post installation confirmation and periodic maintenance a Auto mode 1
20. age increase the speed setting and to get a lighter image decrease the speed setting If the speed setting is increased by 1 exposure time becomes 12 longer 1 Keep 4mA selection switch and 7mA selection switch depressed simultaneously for more than 3 seconds Release the switches if the ready light starts to flash 2 Push D switch momentarily until the light above the D switch illuminates and the exposure time display window shows the present speed setting The factory default setting d 06 should be displayed 3 By depressing 3 switch increase or decrease speed until the desired number is displayed 4 Press T1 switch to store these settings then turn the main power switch off 10 Table 3 Film number and exposure time in film mode at 7mA with regular cone Unit Sec i 4 Film number and exposure time in film mode at 4mA with regular cone Unit Sec in the table denotes that a tube current setting is automatically switched and set at the most appropriate time 11 Unit Sec Table 5 Film number and exposure time in film mode at 7mA with long cone Lem Dn Table 6 Film number and exposure time in film mode at 4mA with long cone Unit Se
21. ance arm spring tension with Cover the balance arm wrench FIGURE 6 FIGURE 6 3 HEAD POSITIONING A Place head into position B If head drifts from the set position adjust the brake screws according to the following procedures FIGURE 7 1 Loosen the yoke side cap screw 03 x 8mm tapping screw and remove the yoke side cap 4 5 2 2 Adjust the six brake screws using a screw driver oke Side Loosen 3 After adjustment reattach the yoke side cap and screw Cap Screw FIGURE 7 Yoke Side Cap 4 MECHANICAL SAFETY 1 The wall plate if used should be checked to confirm its secure attachment to the wall 2 The arm mounting bracket should be checked to confirm its secure attachment to the wall mounting plate or to the wall 3 Check to insure the horizontal arm is not raising up and out of the arm mounting bracket This should be observed routinely by treatment room personnel 24 SECTION 6 ERROR CODE When abnormal condition exists in the unit or malfunction occurs error code is displayed in exposure time display window Possible causes check points and solutions for each error code are described below MEANING Exposure switch is released before the exposure terminates POSSIBLE CAUSE a Operator s fault CHECK POINT SOLUTION Instruct operator to release the exposure switch after the exposure lamp turns off b Exposure switch or the coil cord for exposure s
22. c in the table denotes that a tube current setting is automatically switched and set at the most appropriate time 12 Table 7 Sensor sensitivity number and exposure time in digital mode at 7mA with regular cone Lem in the table denotes that a tube current setting is automatically switched and set at the most appropriate time Table 8 Sensor sensitivity number and exposure time in digital mode at 4mA with regular cone Unit Sec capax Table 9 Sensor sensitivity number and exposure time in digital mode at 7mA with long cone Child teeth T2 T3 T4 T5 T1 T2 T3 T4 TS T2 T3 T4 T5 0 02 0 03 0 03 0 04 0 05 0 06 0 06 0 08 0 10 0 13 0 13 0 16 0 20 0 25 0 32 Unit Sec Table 10 Sensor sensitivity number and exposure time in digital mode at 4mA with long cone in the table denotes that a tube current setting is automatically switched and set at the most appropriate time 2 ELECTRONIC CHIME ON OFF An electronic chime sounds when
23. de to reduce the reverse voltage of x ray tube and switching device Triac are added to AVR output and applied to the primary winding of high voltage transformer 2 Both power lines to the primary winding of high voltage transformer are on and off by Triac and relay Relay activates soon after the exposure switch is depressed and Triac turns on after the pre heating period is finished and at zero crossing timing of line voltage 16 4 PRIMARY CIRCUIT OF FILAMENT TRANSFORMER 1 CIRCUIT AND OPERATIONAL TIMING 1 Parallel circuit of resistor and transistor is added in series to the AVR circuit and applied to the primary circuit of filament transformer 2 As Triac is not inserted in this circuit voltage is applied to the filament transformer if the relay mentioned above turns on 3 Triac in the primary circuit of high voltage transformer turns on at zero crossing point after the pre heating period 2 ADJUSTMENT OF OUTPUT 1 The length of time period during the transistor makes the voltage across the resistor be shortened or opened decides the power to the filament of x ray tube To protect the filament off period of the transistor is adjusted around the peak point of sine wave of line voltage 2 Longer the off period of the transistor becomes the primary voltage becomes lower and tube current decreases 3 Although off period of the transistor during pre heating is adjusted by h xx value off period during exposure cannot be adjus
24. e 4 Radiograph is too dark or too light a Exposure time is too long or too short Check the tooth patient cone and film type are adequate Proper tooth patient and cone type should be selected If film type is different set adequate film speed b Processing condition is not adequate Check the solution temperature or processing speed etc Correct the processing condition c Tube current is too high or too low Check the tube current Refer to page 16 of this manual If tube current is out of 0 5mA adjust h xx and e xx value 28 SECTION 8 REPLACEMENT OF COMPONENT 1 CONTROL BOX 1 POWER GENERATING PCB 1 If one or more results of verification checks are out of specification or trouble shooting chart indicates power generating PCB should be replaced 2 Since power MOS FETs and C MOS micro computer chips are used great care should be paid against electrostatic discharge ESD a Personnel who handle PCB should touch the grounding screw green yellow wire in the control box and discharge the static electricity from his body before working b Replaced PCB should be stored in the anti static bag 2 TIMER PCB 1 If one or more results of verification checks are out of specification or trouble shooting chart indicates timer PCB should be replaced 2 Since micro computer on the timer PCB is C MOS type same care as power generating PCB should be paid against ESD 3 Sinc
25. e 0 5 sec in duration 6 Turn OFF the Main Power Switch 1 in order to prevent accidental exposure when the unit is not in use NOTE If the unit is left over 8 min without being operated and Main Power Switch 1 is kept on figure 1 runs through the Exposure Time Display Window 16 This does not mean that malfunction of the unit has occurred this is an energy saving feature The unit returns to ready condition by pressing any one of the switches except the Exposure Switch 18 4 OPTIONAL HAND EXPOSURE SWITCH An optional hand exposure switch can be connected to the sub controller Since this exposure switch has a coiled cord operators can stand in the most suitable position for operation As controller has separate connector for this exposure switch both exposure switch 18 on the front panel of sub controller and this hand exposure switch can be used If local code prohibits use of both disconnect the connector of either switch 5 ALTERATION OF SETTINGS 1 SPEED SETTING FOR FILM AND DIGITAL IMAGING A FILM SPEED Prior to shipment of the x ray from the factory the following two film speeds are programmed to be selected by the Film Speed Selection Switch a Film speed F 09 equivalent to ISO speed group D or Kodak Ultra speed Film b Film speed F 04 equivalent to ISO speed group F E or Kodak InSight Film In addition to these two speeds BELRAY II 097 x ray can provide 16 different film speeds 00
26. e exposure time display window 6 Sellect 7mA and press the exposure switch to get a reading It should be 180Vac 1 Vac NOTE TO PREVENT OVERHEATING OF THE FILAMENT RELEASE THE EXPOSURE SWITCH AS SOON AS POSSIBLE AFTER THE VOLTAGE VALUE IS OBTAINED 7 If the AVR voltage is higher than this range adjust VR1 a pot at center of PCB counterclockwise very slightly and repeat step 6 to get reading Repeat until an AVR voltage setting becomes within the range of 180 1 Vac ZNCAUTION MAKE SURE 7 mA IS SELECTED IF 4 mA IS SELECTED VOLTAGE IN STEP 6 IS TOO HIGH AND HEAD WILL BE DAMAGED FIGURE 4 JP3 2 and TP2 on Power PCB 18 Alternative method to adjust AVR voltage Adjusting method of AVR voltage on page requires the tube head to be connected If by any reason AVR voltage should be adjusted without head following method can be used this method the reference voltage for AVR circuit is adjusted 1 Prepare a digital multimeter capable to measure 10 Vac within 0 01 Vac accuracy 2 Set the range of digital multimeter at 10Vac 3 Turn off the main switch Open the front panel of the main controller and connect one lead of multimeter to TP3 a wire ring test terminal on the power generating PCB Connect the other lead of multimeter to TP2 test terminal on the power generating PCB Refer to FIGURE 4B 4 Turn on the main switch and select 7mA A CAUTION MAKE SURE 7 mA IS SELECTED IF 4mA IS SELECTED
27. e is displayed at the exposure time display window while the exposure switch is depressed 5 Keep depressing the exposure switch press the mA selection switch again Then T5 tooth light comes on and tube current of the last pulse of the exposure is displayed at the exposure time display window This value is tube current at the stabilized portion of the exposure 6 If tube current of the first pulse is out of 2 mA from the rated current perform the h XX adjustment If tube current of the last pulse is out of mA from the rated current perform the e XX adjustment 20 Direct measurement 1 Prepare a multimeter capable to measure 5 Vdc with 1 accuracy within 1 second 2 Turn off the main switch 3 Open the front panel of main controller 4 Set to the suitable range of multimeter to measure 5Vdc 5 Connect the positive lead of multimeter to test point at lower left corner on the power and negative lead to the test point TP6 at upper left corner on the power PCB 6 Turn on the main switch 7 Set the exposure time to 2 seconds 8 Make exposure and read the multimeter during exposure ZNWARNING X RADIATION IS GENERATED FOR 2 SECONDS 9 Multiply the voltage reading by 2 becomes tube current Ex If reading is 3 45 Vdc then tube current is 3 45X 2 2 6 9 mA This value is the tube current at the stabilized portion of the exposure By this method tube current at the beginning of exposure cannot be measured
28. e screws are used against plastic panel don t over tighten when installing a new PCB 4 After new timer PCB is installed following confirmation adjustment and setting must be per formed If the setting of b d below is not changed from factory setting for the previous timer PCB only a is necessary a is always necessary a Tube current confirmation and adjustment b Film speed setting c Priority setting for patient cone and film speed d Electronic chime on off setting 2 TUBE HEAD 1 If one or more results of verification checks are out of specification or trouble shooting chart indicates tube head should be replaced 2 When dismounting the head from arm be careful of the arm ZNWARNING AS BALANCE ARM IS HIGHLY TENSIONED IT IS NECESSARY TO PLACE THE HEAD AT MAXIMUM HEIGHT BEFORE REMOVING HEAD 3 After new head is mounted adjustment of tube current is always necessary Perform h xx and e xx adjustment according to the steps described at auto mode on page 19 29 CIRCUIT DIAGRAM SECTION 9 94 4 sUeJ 6 MO 9A 43171041409 30 TAKARA BELMONT CORPORATION 2 1 1 Higashishinsaibashi Chuo ku Osaka 542 0083 Japan TEL 06 6213 5945 FAX 06 6212 3680 Book No 1A091AA0 Printed in Japan 2011 10 TM
29. ht and pre select light for cone type film or digital mA and patient size illuminate It is recommended to keep this switch OFF when the unit is not in use in order to prevent an accidental exposure 2 Ready Light This light illuminates when the line voltage is within operable range When this light is not on exposure can not be made 3 4 Exposure Time Adjusting Switches By momentarily pushing the or amp 2 switch the exposure time displayed increases decreses by one increment By keeping the switch depressed more 2 sec the exposure time displayed increases or decreases continuously until the switch is released Model 097 has the following 23 exposure time settings 0 00 0 02 0 03 0 04 0 05 0 06 0 08 0 10 0 13 0 16 0 20 0 25 0 32 0 40 0 50 0 63 0 80 1 00 1 25 1 60 2 00 2 50 3 20 sec 5 9 Tooth Selection Switches T1 T5 Pushing one of these switches sets the exposure time automatically for the following 10 15 5 Incisor of Mandible 6 T2 Incisor of Maxilla Cuspid amp Premolar of Mandible 7 T3 Cuspid amp Premolar of Maxilla Molars of Mandible Bite Wing 8 4 Molar of Maxilla Bite Wing Molars 9 T5 Occlusal If the T1 switch 5 is depressed more than 3 sec unit goes into Lock Mode In lock mode the only functional switch is the power switch To exit from the lock mode depress the T1 switch more than 3 sec again 10 Cone Type Selection
30. ight 2 is illuminated NOTE The ready light will not illuminate unless the incoming line voltage is correct and within the x ray s operable range 3 Select the appropriate tooth type 5 9 and confirm the pre selected conditions cone type film or digital mA and patient size are suitable for exposure NOTE To manually set the exposure time depress either of the manual Exposure Time Adjust Switches or until the desired exposure time appears in the Exposure Time Display Window 16 While the unit is in manual mode other selection switches 5 15 do not affect exposure time of the tooth selection lights are off To return to the automatic exposure time selection mode depress any one of Tooth Selection Switches 5 9 4 Depress the Exposure Switch 8 When the Exposure Switch is depressed the Exposure Warning Light 17 illuminates and the audible warning sounds Do not release the Exposure Switch until the Exposure Warning Light and audible warning automatically shut off Failure to keep the switch depressed will result in exposure being terminated prematurely 5 To continue to radiograph other teeth just select appropriate Tooth Selection Switches 5 9 IMPORTANT To protect x ray tubehead from heat accumulation wait for a time interval that is equal to 50 times the selected exposure time before making additional exposures Example a 25 sec wait is necessary between exposures that ar
31. nt is detected during pre heating period High voltage is applied to x ray tube during pre heating period Tum off the main switch and wait for a while Tum on the main switch again If E 11 still appears change the power PCB Tube current is detected when main power switch is turned ON Both relay and triac are broken or MA feedback circuit is defective Turn off the main switch and wait for a while Tum on the main switch again If E 12 still appears change the power PCB Failure of communication between power PCB and time PCB Electrical noise makes mis communication off the main switch and wait for Approximately 2 min Turn on again If E 22 still appears check the cable between the PCBs Any switch on the sub controller is depressed when the power switch is tumed on Some switch on the timer PCB is defective Turn off the main switch and wait for Approximately 2 min 27 Turn on again If E 23 still appears change the Timer PCB SECTION 7 TROUBLE SHOOTING Error code is displayed in the exposure time display window for most troubles in daily usage So the error code table in section 6 can be used as trouble shooting chart in most case Some troubles that don t make error code displayed are listed in the following table with their possible causes check points and solutions POSSIBLE CAUSE CHECK POINT SOLUTION PROBLEM 1 FIN doesn
32. nt is within 0 5 mA from the selected current PH adjustment is finished If tube current is still out of the range repeat step 2 6 above 2 MANUAL SETTING METHOD FOR e xx 1 Check tube current at stabilized portion of exposure by the manual mode page 20 or by the direct measurement page 21 If tube current is out of the range of 0 5 mA from the rated tube current perform following adjustment 2 Turn the main power switch 21 4 Keep depressing patient cone F film button until e xx is displayed on the exposure time window Select the tube current that should be adjusted Press T2 switch then display changes to e xx xx is the value presently memorized If tube current is lower than 0 5 mA from the rated tube current at step 1 press A switch next to the exposure time display window and e xx value displayed will be increased If tube current is higher than 0 5 mA press W switch and e xx value displayed will be decreased has 32 kinds of values Press the patient switch to memorize the e xx value displayed to the memory If value is stored electronic chime will should twice Turn off the main switch and check the tube current at stabilized portion of exposure again If tube current is within 0 5 mA from the selected tube current e xx adjustment is finished tube current is still out of the range repeat step 2 7 above ADJUSTMENT OF LINE VOLTAGE MEASUREMEN
33. recise exposure time control SECTION 3 DESCRIPTION FOR FUNCTIONS 1 GENERAL The Belmont Belray 097 is advanced 70 kVp intra oral x ray machine consisting of four major components tube head balance arm main controller and sub controller Because of its modular design sub controller can be readily remotely located to accommodate room design and radiation control requirements The main controller consists of power generator timing and control circuits Since Belray II 097 utilize the AVR automatic voltage regulator circuit instead of step up down transformer to compensate line voltage fluctuation and also tube current is controlled by feed back system quality of x radiation is quit stable over whole range of exposure time from 1 pulse to 3 2 seconds Precise and short exposure time enables Belray 097 to use with the digital image receptor The tube head is a vacuum sealed oil cooled unit with the high voltage transformer and x ray tube self contained No high voltage lines run outside of the head Except for mechanical repairs yoke bearings etc or external wiring problems tube head must be replaced as a unit It can not be opened in the field The counterbalanced arms provide a precisely balanced long reach support for the x ray head These arms contain highly tensioned springs which can cause serious injury if accidentally released ZNCAUTION DO NOT ATTEMPT TO DISASSEMBLE THESE ARMS IN THE FIELD 15 2 AUTOMATIC V
34. sec 40 b Distal end of long cone 2 4mGy sec 3 3mGy sec 40 14 Cone Source to skin distance Field size CONG 204 58mm dia circular b Long 2 305 mm 58mm dia circular 15 Leakage technique 70 kV peak 494 mAs at 1 hour 10 DUY CY CIS T 1 50 0 5 sec exposure with 25 sec interval 17 Source to the base of cone distance 81 mm 18 Reference current time 22 4 mAs 70 kV peak 7 mA 3 2 sec 19 Maximum earth leakage 0 5 mA 20 Tolerance of the focal spot marking 1 mm 21 Target angle and material eee mens 16 1 Tungsten 22 Maximum anode heat content 4 3 kJ 6 KHU 23 Maximum x ray tube assembly heat content 150 kJ 210 kHU 24 Nominal electrical output of H V Generator 0 36 kW at 70 kV 7 mA 25 Measurement base of technique factors Focal spot marking a Peak tube polen bil Peak tube potential of conducting half cycle b Tube CUETO IE NNUS Average of tube current during one cycle of line frequency EXpos re Impulses of power line frequency 26 Environmental condition for storage
35. switches are depressed If preferred this sound can be deactivated as follows 1 Keep T1 and T2 switches depressed together for more than 3 seconds Release the switches if the ready light starts to flash 2 bu 2 will be displayed in exposure time display window 3 By depressing either switch display changes to bu O 4 Press P switch Patient type Switch to store this setting and turn off the main power switch NOTE Exposure Warning Buzzer and alarm sound of error code can not be eliminated 14 3 PRIORITY OF SELECTIONS Factory default setting Cone Regular cone Film Speed Digital Imaging off mA selection 7 mA Adult If necessary these settings be changed For example if digital imaging is used for pedodontistry digital imaging and child patient type shall be selected 1 Keep 4mA selection switch and 7mA selection switch depressed simultaneously for more than 3 seconds Release the switches if the ready light starts to flash 2 Press D switch momentarily Light above D switch illuminates and speed setting for digital imaging is displayed on exposure time display window 3 Select the patient type child by depressing P switch momentarily 4 Press T1 switch to store these settings then turn the main power switch off 5 Cone type mA selection can be changed by same procedures NOTE For digital imaging 4 mA is recommended to get good contrast and p
36. ted manually as the micro computer adjusts it automatically for each pulse according to the tube current at that time In this system tube current during exposure can not be adjusted To improve this changing e xx value makes the reference value for tube current increased or decreased 4 After all tube current at the beginning of exposure can be adjusted by h xx setting and tube current at stabilized period of exposure is adjusted by e xx setting Both h xx and e xx have 32 stages 000 IF A 10 F 15 Higher setting makes tube current increased 3 OVER CURRENT PROTECTION 1 Over current protection in the AVR circuit works with relatively high current As the rated current for primary circuit of filament transformer is approx 0 2 Aac this over current protection circuit will not work when the abnormal condition occurs in the filament circuit 2 Current sensing resistor is inserted in the primary circuit of filament transformer When the voltage across this resistor makes LED of photo coupler ON E 04 is displayed and output voltages to the high voltage transformer and filament transformer are terminated instantly 5 AUTOMATIC TUBE CURRENT CONTROL 1 CIRCUIT 1 Tube current fed back from tube head is converted into voltage by the resistor totally 5000 on power generating PCB 2 This voltage is integrated for each pulses of line frequency by the operational amplifier and applied to the micro computer 2 STABILIZING METHOD OF T
37. voltage between TP2 and TP3 on the power PCB at 7mA setting If the voltage is out of range of 7 30 0 02Vac adjust the voltage to 7 30Vac by VR1 on the power PCB After adjustment tube current confirmation should be done Tube current of the last pulse is more than 5mA at 4mA setting or more than 8 75 at 7mA setting AVR voltage is too high Refer to CHECK POINT of 05 Refer to SOLUTION of E 05 Tube current during exposure is less than 2mA at 4mA setting or less than 3 5mA at 7mA setting a AVR voltage is too low Refer to CHECK POINT of 05 Refer to SOLUTION of E 05 b Cables between the control box and head are broken or mis wired Check each cables for continuity and mis wiring Correct the cable c Power PCB is defective If all cables are OK and AVR voltage cannot be adjusted to 180Vac or TP2 and TP3 voltage cannot be adjusted to 7 30 Vac at 7mA setting power PCB may be defective Change the power PCB and check AVR voltage or TP2 TP3 voltage again d Defect of tube head Filament damage If AVR voltage and cable are all right tube head may be defective 26 Change the tube head and confirm the function again MEANING Tube current during exposure is more than 6mA at 4mA setting or more than 10 5mA at 7mA setting POSSIBLE CAUSE a AVR voltage is too high CHECK POINT Refer to CHECK POINT of 05 SOLUTION Refer to SOLUTION
38. witch is defective Disconnect the exposure switch form the sub controller and check the continuity during the exposure switch is on If defect is found exchange the exposure switch and cord Exposure switch is depressed within 10 sec from the previous exposure Operator s fault Instruct operator to take a wait interval of 50 times of exposure time between two successive exposures Line voltage is less than 90 of rated voltage a Line voltage is less than 9096 of the rated voltage Measure the incoming voltage between terminal L and N of terminal block in the control box If line voltage is less than 9096 of the rated voltage correct the voltage with additional step up transformer b Wave form of line voltage is differ from sine wave Measure the incoming voltage between terminal L and N of terminal block in the control box If line voltage is close to 90 of rated voltage but over 90 set PC x setting to PC 2 Press T2 3 4 and power switch for PC x setting mode Line voltage is more than 11096 of rated voltage a Line voltage is more than 110 of the rated voltage Measure the incoming voltage between terminal L and N of terminal block in the control box If line voltage is more than 110 of rated voltage correct the voltage with additional step down transformer b Wave form of line voltage is differ from sine wave Measure the incoming voltage between
39. witch to store the value in the memory on timer PCB If the setting is stored electronic chime will sound twice Turn off the main switch and wait for a while and turn on again If the ready lamp is still off although the multimeter indicates 90 110 of the rated line voltage the wave form of line voltage is far from sine wave more than 3 or transformer on the power generating PCB or timer PCB might be defective 22 SECTION 5 PERIODIC INSPECTION AND ADJUSTMENT Following inspections and adjustments should be performed after installation when parts are changed and once every 6 months by a trained service technician to ensure that the x ray unit is functioning with the manufacturer s specifications and remains in compliance with the standard 1 ELECTRICAL INSPECTION AND ADJUSTMENT 1 POWER SUPPLY VOLTAGE Power supply voltage must be within the operable range 90 110 of rated line voltage Confirm the power supply voltage before turning the unit on 1 Open the front panel of control box by loosening two screws on top of control box 2 Set the range of digital multimeter at 300Vac connect probes of multimeter to L and N terminals of terminal block in the control box 3 Confirm that the reading is rated line voltage 10 2 CONFIRMATION OF TUBE CURRENT Confirm the tube current at beginning and at stabilized portion of exposure by auto mode as page 16 3 EXPOSURE WARNING BUZZER AND LAMP a Exposure warning bu
40. zzer Make an exposure and confirm that the exposure warning buzzer located within the control box is activated during the entire exposure b Exposure warning lamp Make an exposure and confirm that the exposure warning lamp illuminates during the exposure Exposure warning lamp is located on the front panel of the control box 4 LINE VOLTAGE REGULATION 1 Make sure that a main power switch is OFF 2 Open the front panel of control box by loosening two screws on top of the control box 3 Set the range of digital multimeter at 300Vac connect probes of multimeter to L and N terminals of terminal block in the control box 4 Turn the main power switch on and select 7mA and set the exposure time at 2 00 seconds by A switch next to the exposure time display window Record the no load line voltage VN indicated by the multimeter before the exposure 6 Make an exposure and record the load voltage VL indicated by the multimeter during the exposure Z WARNING X RADIATION IS GENERATED FOR 2 SECONDS NOTE Read the multimeter after the value is stabilized about one second after the exposure starts 7 Calculate line voltage regulation in the formula below R VN VL VL x 100 must not exceed the range of 2 If it is greater than 2 the size of the power supply wires must increased Refer to the power supply requirements of the model 097 installation instructions to determine the correct wire size necessary 23
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