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DENTAL X-RAY
097
SERVICE
MANUAL
( for 220V, 230V, 240V )
R
INDEX
SECTION 1 : TECHNICAL DATA page
[1] ELECTRICAL AND RADIATION DATA ･･････････････････････････････････････2
[2] PHYSICAL DIMENSIONS ･･････････････････････････････････････････････････3
[3] TUBE HEAD THERMAL CHARACTERISTICS ････････････････････････････････5
SECTION 2 : OPERATION INSTRUCTION
[1] LAYOUT OF CONTROL BOX ･･････････････････････････････････････････････6
[2] FUNCTION OF CONTROLS ････････････････････････････････････････････････7
[3] OPERATING PROCEDURES ･･･････････････････････････････････････････9
[4] OPTIONAL HAND EXPOSURE SWITCH･･････････････････････････････････････9
[5] ALTERATION OF SETTING ･･････････････････････････････････････････････10
SECTION 3 : DESCRIPTION FOR FUNCTIONS
[1] GENERAL ･･････････････････････････････････････････････････････････････15
[2] AUTOMATIC VOLTAGE REGULATOR ･････････････････････････････････････16
[3] PRIMARY CIRCUIT OF HIGH VOLTAGE TRANSFORMER ････････････････････16
[4] PRIMARY CIRCUIT OF FILAMENT TRANSFORMER ･････････････････････････17
[5] AUTOMATIC TUBE CURRENT CONTROL ･･････････････････････････････････17
SECTION 4 : ADJUSTMENT
[1] AVR VOLTAGE ･････････････････････････････････････････････････････････18
[2] INSPECTION OF TUBE CURRENT ･････････････････････････････････････････20
[3] ADJUSTMENT OF TUBE CURRENT ････････････････････････････････････････21
[4] ADJUSTMENT OF LINE VOLTAGE MEASUREMENT ERROR ･････････････････22
SECTION 5 : PERIODIC INSPECTION AND ADJUSTMENT
[1] ELECTRICAL INSPECTION AND ADJUSTMENT ････････････････････････････23
[2] MECHANICAL INSPECTION ･･････････････････････････････････････････････24
SECTION 6 : ERROR CODE
･･･････････････････････････････････････････････････25
SECTION 7 : TROUBLE SHOOTING
････････････････････････････････････････････27
SECTION 8 : REPLACEMENT OF COMPONENT
[1] CONTROL BOX ････････････････････････････････････････････････････････29
[2] TUBE HEAD ･･･････････････････････････････････････････････････････････29
SECTION 9 : CIRCUIT DIAGRAM
･････････････････････････････････････････････30
SECTION 1 : TECHNICAL DATA
[ 1 ] ELECTRICAL AND RADIATION DATA
1. Nominal focal spot value ---------------------------------0.7 (IEC60336)
2. Rated peak tube potential -------------------------------- 70 kV
3. Rated tube current ----------------------------------------- 4 mA / 7 mA selectable
4. Maximum rated peak tube potential -------------------- 70 kV
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
[Vac]
220 230 240
[Vac] 198 207 216
[Vac] 242
[kVA] 0.8
[Aac] 3.4
253
0.8
3.4
264
0.8
3.4
[Aac] 3.7 3.7 3.7
(Internal Resistance
[Ω]
) （1.27max）
1.33max） 1.38max）
Range of Line Voltage Regulation [%]
0 ~ 2 0 ~ 2 0 ~ 2
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 Al 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
a. Distal end of regular cone ----------------------------- 4.2mGy/sec. 7.1mGy/sec.
±
40%
b. Distal end of long cone -------------------------------- 2.4mGy/sec. 3.3mGy/sec.
±
40%
14.
Cone Source to skin distance Field size
a. Regular cone ............................................................. 204 mm 58mm dia., circular
b. Long cone (Option) ................................................. 305 mm 58mm dia., circular
15. Leakage technique factor ............................................ 70 kV( peak), 494 mAs at 1 hour
16. Duty cycle ................................................................... 1
: 50 (0.5 sec. exposure with 25 sec. interval)
17. Source to the base of cone distance ............................ 81 mm
18. Reference current time product ...................................
22.4 mAs (70 kV(peak), 7 mA, 3.2 sec.)
19. Maximum earth leakage current ................................. 0.5 mA
20. Tolerance of the focal spot marking ............................ ±1 mm
21. Target angle and material ............................................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
Reference axis
a. Peak tube potential .............................
...................... Peak tube potential of conducting half cycle
b. Tube current ............................................................. Average of tube current during one cycle of
line frequency
c. Exposure time ........................................................... Impulse s of power line frequency
26
Environmental condition for storage............................
-20 ~ 70℃, 10 ~ 90%, 500 ~ 1060 hPa
27. Environmental condition for operation........................10 ~ 40℃, 30 ~ 75%, 700 ~ 1060 hPa
28.
Rotation angle of head ................................................ Horizontal 0 ~ 600°, Vertical 0 ~ 300°
29. Service Life..................................................................10 Years
-2-
[ 2 ] PHYSICAL DIMENSIONS
220
°
WK Type
2-1/4"
(58)
5-5/8"(142)
31-1/2" (800)
Max. 46-7/8" (1190)
Stroke 43-5/16" (1100)
600
°
3-3/16"
(80)
9
0
°
90
°
( ) =mm
Location for Wires
MAX 73-1/8" (1857)
300
°
Cabinet Frame
6-3/16" (157)
38-5/16" (973)
39-3/16" (995)
48-5/16" (1243)
7-15/16"
(226)
10-1/4"
(260)
Focal Spot Marking
Reference Axis
SSD (Source to Skin Distance) : a. Regular cone----------8 inches (203 mm) b. Long cone------------12 inches (305mm)
SSD
SSD + 195 mm
Fig.1 Dimensions
-3-
FM Type
680
80
°
600°
Max.1190
Stroke 1100
80
Sub Controller
Max.1000
270
30
0°
Main Controller
RK Type
500
180°
130 260
400
260
°
600°
350 80
106 506
Main Controller
270
300°
Fig.1-6 Dimensions
-4-
FK1/FK2 Type
220
°
220°
300
600°
Max.1190
Stroke 1100
80
Sub Controller
Max.1300
Main Controller
270
30
0°
CK Type
220
°
30
0°
300 Max.1190
Stroke1100
270
30
0°
[ 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 curve
1. Tube housing cooling curve 2. Anode thermal characteristics
250
4500
4300J
4000
200
3500
150
100
50
0
0 20 40 60 80
Time in Minutes
100 120 140
100W
3000
2500
2000
1500
1000
500
COOLING
50W
0
0 50 100 150 200 250 300
Time [S]
3. Maximum rating chart
20
50kV
18
16
60kV
14
70kV
12
10
8
6
0.1 0.2 0.3 0.5 0.7 1 2 3 5 7 10
Exposure Time [S]
-5-
SECTION 2 : OPERATION INSTRUCTIONS
[ 1 ] LAYOUT OF CONTROLLERS
10
11 12
16 13 14
1
3
15
4
5
6
7
2
9
8
17
18
Fig.2 Major Components and Control Identification
(1) Main Power Switch
(2) Ready Light
(10) Cone Type Selection Switch
(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)
(6) Tooth Selection Switch (T2)
(7) Tooth Selection Switch (T3)
(8) Tooth Selection Switch (T4)
(9) Tooth Selection Switch (T5)
(14) 7mA Selection Switch
(15) Patient Size Selection Switch
(16) Exposure Time Display Window
(17) Exposure Warning Light
(18) Exposure Switch
-6-
[ 2 ] FUNCTION OF CONTROLS
(1) Main Power Switch
Pushing the upper side of this switch to the ON position energizes the x-ray unit. (Ready light
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.
IMPORTANT : To prevent the risk of an accidental exposure, push the lower side
of this switch to the OFF position, when the unit is not in use.
(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 ) switch, the exposure time displayed increases (or
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) T1 : Incisor of Mandible
(6) T2 : Incisor of Maxilla, Cuspid & Premolar of Mandible
(7) T3 : Cuspid & Premolar of Maxilla, Molars of Mandible, Bite Wing
(8) T4 : 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 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
a. BELRAY II has 16 film speed settings : (F.00 ~ F.15)
Two speed settings are pre-set at the factory (a & b) and can be selected with (11).
a = Film speed No. F.09 (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 & 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 : (d.00 ~ d.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
Setting
F.09
F.04
d.06
mA
4
7
4
7
4
7
T1 T2
Child
T3 T4 T5 T1 T2
Adult
T3 T4 T5 T1 T2
Obese
T3 T4 T5
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
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
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
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
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
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
Setting
F.09
F.04
d.06
mA
4
7
4
7
4
7
T1 T2
Child
T3 T4 T5 T1 T2
Adult
T3 T4 T5 T1 T2
Obese
T3 T4 T5
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
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
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
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
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
0.06 0.13 0.13 0.20 0.25 0.10 0.20 0.25 0.32 0.40 0.13 0.25 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 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).
-8-
[ 3 ] OPERATING PROCEDURES
1. Turn ON the Main Power Switch (1).
2. Confirm that Ready Light (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. (All 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 are
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.
-9-
[ 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
(F.00 ~ F.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 or 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, F.05, push F switch momentarily until the
"b" light illuminates. By depressing or 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 ~ d.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 image, 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 or 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) patient Child Adult Obese
(Unit : Sec.) teeth T1 T2 T3 T4 T5 T1 T2 T3 T4 T5 T1 T2 T3 T4 T5
F.00
0.02
0.04
0.04
0.06
0.08
0.04
0.06
0.08
0.10
0.13
0.04
0.08
0.08
0.13
0.16
F.01
0.03
0.04
0.05
0.08
0.10
0.04
0.08
0.08
0.10
0.16
0.05
0.08
0.10
0.13
0.20
F.02
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
F.03
0.04
0.06
0.08
0.10
0.16
0.06
0.10
0.13
0.16
0.25
0.08
0.13
0.16
0.20
0.32
F.04
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
F.05
0.05
0.08
0.10
0.13
0.20
0.08
0.16
0.16
0.25
0.32
0.10
0.16
0.20
0.32
0.40
F.06
0.06
0.10
0.13
0.16
0.25
0.10
0.16
0.20
0.25
0.40
0.13
0.20
0.25
0.32
0.50
F.07
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
F.08
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
F.09
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
F.10
0.13
0.20
0.25
0.32
0.50
0.20
0.40
0.40
0.63
0.80
0.25
0.40
0.50
0.63
1.00
F.11
0.16
0.25
0.32
0.40
0.63
0.25
0.40
0.50
0.63
1.00
0.32
0.50
0.63
0.80
1.25
F.12
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
F.13
0.25
0.40
0.50
0.63
0.80
0.40
0.63
0.80
1.00
1.60
0.50
0.80
1.00
1.25
1.60
F.14
0.25
0.50
0.50
0.80
1.00
0.40
0.80
0.80
1.25
1.60
0.50
1.00
1.00
1.60
2.00
F.15
0.32
0.50
0.63
0.80
1.25
0.50
0.80
1.00
1.60
2.00
0.63
1.00
1.25
1.60
2.50
Table 4. Film number and exposure time in film mode (at 4mA with regular cone) patient teeth
(Unit : Sec.)
Child Adult Obese
T1 T2 T3 T4 T5 T1 T2 T3 T4 T5 T1 T2 T3 T4 T5
F.00
0.04
0.06
0.08
0.10
0.16
0.06
0.10
0.13
0.16
0.25
0.08
0.13
0.16
0.20
0.32
F.01
0.05
0.08
0.10
0.13
0.20
0.08
0.13
0.16
0.20
0.32
0.10
0.16
0.20
0.25
0.40
F.02
0.06
0.10
0.10
0.16
0.20
0.10
0.16
0.20
0.25
0.32
0.10
0.20
0.20
0.32
0.40
F.03
0.06
0.10
0.13
0.16
0.25
0.10
0.16
0.20
0.32
0.40
0.13
0.20
0.25
0.32
0.50
F.04
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
F.05
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
F.06
0.10
0.20
0.25
0.32
0.40
0.20
0.32
0.40
0.50
0.80
0.25
0.40
0.50
0.63
0.80
F.07
0.13
0.25
0.25
0.40
0.50
0.20
0.40
0.40
0.63
0.80
0.25
0.50
0.50
0.80
1.00
F.08
0.16
0.25
0.32
0.40
0.63
0.25
0.40
0.50
0.63
1.00
0.32
0.50
0.63
0.80
1.25
F.09
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
F.10
0.25
0.40
0.50
0.63
1.00
0.40
0.63
0.80
1.00
1.60
0.50
0.80
1.00
1.25
2.00
F.11
0.25
0.50
0.63
0.80
1.00
0.50
0.80
1.00
1.25
1.60
0.63
1.00
1.25
1.60
2.00
F.12
0.32
0.50
0.63
1.00
1.25
0.50
1.00
1.00
1.60
2.00
0.63
1.25
1.25
2.00
2.50
F.13
0.40
0.63
0.80
1.00
1.60
0.63
1.00
1.25
1.60
2.50
0.80
1.25
1.60
2.00
3.20
F.14
0.50
0.80
1.00
1.25
2.00
0.80
1.25
1.60
2.00
3.20
1.00
1.60
2.00
2.50
F.15
0.63
1.00
1.25
1.60
2.50
1.00
1.60
2.00
2.50
* 1.25
2.00
2.50
3.20
*
*
("*" in the table denotes that a tube current setting is automatically switched and set at the most appropriate time.)
- 11 -
Table 5. Film number and exposure time in film mode (at 7mA with long cone) patient Child Adult Obese
(Unit : Sec.) teeth T1 T2 T3 T4 T5 T1 T2 T3 T4 T5 T1 T2 T3 T4 T5
F.00
0.05
0.08
0.10
0.13
0.20
0.08
0.13
0.16
0.20
0.32
0.10
0.16
0.20
0.25
0.40
F.01
0.06
0.10
0.10
0.16
0.20
0.10
0.16
0.20
0.25
0.32
0.10
0.20
0.20
0.32
0.40
F.02
0.06
0.10
0.13
0.20
0.25
0.10
0.20
0.20
0.32
0.40
0.13
0.25
0.25
0.40
0.50
F.03
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
F.04
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
F.05
0.10
0.20
0.25
0.32
0.40
0.20
0.32
0.40
0.50
0.80
0.25
0.40
0.50
0.63
0.80
F.06 0.13 0.25 0.25 0.40 0.50 0.25 0.40 0.50 0.63 0.80 0.25 0.50 0.50 0.80 1.00
F.07
0.16
0.25
0.32
0.40
0.63
0.25
0.50
0.50
0.80
1.00
0.32
0.50
0.63
0.80
1.25
F.08
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
F.09
0.25
0.40
0.50
0.63
1.00
0.40
0.63
0.80
1.00
1.60
0.50
0.80
1.00
1.25
2.00
F.10
0.32
0.50
0.63
0.80
1.00
0.50
0.80
1.00
1.25
2.00
0.63
1.00
1.25
1.60
2.00
F.11
0.32
0.63
0.63
1.00
1.25
0.50
1.00
1.00
1.60
2.00
0.63
1.25
1.25
2.00
2.50
F.12
0.40
0.63
0.80
1.00
1.60
0.63
1.00
1.25
1.60
2.50
0.80
1.25
1.60
2.00
3.20
F.13
0.50
0.80
1.00
1.25
2.00
0.80
1.25
1.60
2.00
3.20
1.00
1.60
2.00
2.50
3.20
F.14
0.63
1.00
1.25
1.60
2.50
1.00
1.60
2.00
2.50
3.20
1.25
2.00
2.50
3.20
3.20
F.15
0.63
1.25
1.25
2.00
2.50
1.25
2.00
2.50
3.20
3.20
1.25
2.50
2.50
3.20
3.20
Table 6. Film number and exposure time in film mode (at 4mA with long cone) patient teeth
(Unit : Sec.)
Child Adult Obese
T1 T2 T3 T4 T5 T1 T2 T3 T4 T5 T1 T2 T3 T4 T5
F.00
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
F.01
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
F.02
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
F.03
0.13
0.25
0.25
0.40
0.50
0.25
0.40
0.50
0.63
0.80
0.25
0.50
0.50
0.80
1.00
F.04
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
F.05
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
F.06
0.25
0.40
0.50
0.63
1.00
0.40
0.63
0.80
1.00
1.60
0.50
0.80
1.00
1.25
2.00
F.07
0.32
0.50
0.63
0.80
1.25
0.50
0.80
1.00
1.25
2.00
0.63
1.00
1.25
1.60
2.50
F.08
0.32
0.63
0.63
1.00
1.25
0.63
1.00
1.25
1.60
2.00
0.63
1.25
1.25
2.00
2.50
F.09
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
F.10
0.50
0.80
1.00
1.25
2.00
0.80
1.25
1.60
2.00
3.20
1.00
1.60
2.00
2.50
*
F.11
0.63
1.00
1.25
1.60
2.50
1.00
1.60
2.00
2.50
* 1.25
2.00
2.50
3.20
F.12
0.80
1.25
1.60
2.00
2.50
1.25
2.00
2.50
3.20
* 1.60
2.50
3.20
*
F.13
0.80
1.60
1.60
2.50
3.20
1.25
2.50
2.50
* * 1.60
3.20
3.20
*
*
*
*
F.14
1.00
1.60
2.00
2.50
* 1.60
2.50
3.20
*
F.15
1.25
2.00
2.50
3.20
* 2.00
3.20
* *
*
*
2.00
2.50
3.20
*
*
*
*
*
*
*
("*" 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) patient Child Adult Obese teeth d.00
d.01
d.02
T1
*
*
*
T2
0.02
0.02
0.03
T3
0.02
0.03
0.03
T4
0.03
0.04
0.04
T5
0.04
0.05
0.06
T1
0.02
0.02
0.03
T2
0.03
0.04
0.04
T3
0.04
0.04
0.05
T4
0.05
0.06
0.06
T5
0.06
0.08
0.10
T1
0.02
0.03
0.03
T2
0.04
0.04
0.05
T3
0.04
0.05
0.06
T4
0.06
0.08
0.08
T5
0.08
0.10
0.13
d.03
0.02
0.03
0.04
0.05
0.08
0.03
0.05
0.06
0.08
0.13
0.04
0.06
0.08
0.10
0.16
d.04
0.02
0.04
0.05
0.06
0.08
0.04
0.06
0.08
0.10
0.13
0.05
0.08
0.10
0.13
0.16
d.05
0.03
0.05
0.05
0.08
0.10
0.04
0.08
0.08
0.13
0.16
0.05
0.08
0.10
0.13
0.20
d.06
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
d.07
0.04
0.06
0.08
0.10
0.16
0.06
0.10
0.13
0.16
0.25
0.08
0.13
0.16
0.20
0.32
d.08
0.05
0.08
0.10
0.13
0.20
0.08
0.13
0.16
0.20
0.32
0.10
0.16
0.20
0.25
0.40
d.09
0.06
0.10
0.10
0.16
0.20
0.10
0.16
0.20
0.25
0.32
0.10
0.20
0.20
0.32
0.40
d.10
0.06
0.10
0.13
0.16
0.25
0.10
0.20
0.20
0.32
0.40
0.13
0.20
0.25
0.32
0.50
d.11
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
d.12
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
d.13
0.13
0.20
0.25
0.32
0.40
0.20
0.32
0.40
0.50
0.80
0.25
0.40
0.50
0.63
0.80
d.14
0.13
0.25
0.25
0.40
0.50
0.20
0.40
0.40
0.63
0.80
0.25
0.50
0.50
0.80
1.00
d.15
0.16
0.25
0.32
0.40
0.63
0.25
0.40
0.50
0.80
1.00
0.32
0.50
0.63
0.80
1.25
("*" 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) patient teeth
Child Adult Obese
T1 T2 T3 T4 T5 T1 T2 T3 T4 T5 T1 T2 T3 T4 T5 d.00
0.02
0.03
0.04
0.05
0.08
0.03
0.05
0.06
0.08
0.13
0.04
0.06
0.08
0.10
0.16
d.01
0.02
0.04
0.05
0.06
0.10
0.04
0.06
0.08
0.10
0.16
0.05
0.08
0.10
0.13
0.20
d.02
0.03
0.05
0.06
0.08
0.10
0.05
0.08
0.10
0.13
0.16
0.06
0.10
0.10
0.16
0.20
d.03
0.03
0.06
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
d.04
0.04
0.06
0.08
0.10
0.16
0.06
0.10
0.13
0.16
0.25
0.08
0.13
0.16
0.20
0.32
d.05
0.05
0.08
0.10
0.13
0.20
0.08
0.13
0.16
0.20
0.32
0.10
0.16
0.20
0.25
0.40
d.06
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
d.07
0.06
0.10
0.13
0.20
0.25
0.10
0.20
0.20
0.32
0.40
0.13
0.25
0.25
0.40
0.50
d.08
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
d.09
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
d.10
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
d.11
0.13
0.25
0.25
0.40
0.50
0.25
0.40
0.50
0.63
0.80
0.25
0.50
0.63
0.80
1.00
d.12
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
d.13
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
d.14
0.25
0.40
0.50
0.63
1.00
0.40
0.63
0.80
1.00
1.60
0.50
0.80
1.00
1.25
2.00
d.15
0.32
0.50
0.63
0.80
1.25
0.50
0.80
1.00
1.25
2.00
0.63
1.00
1.25
1.60
2.50
(Unit : Sec.)
- 13 -
Table 9. Sensor sensitivity number and exposure time in digital mode (at 7mA with long cone) patient Child Adult Obese teeth T1 T2 T3 T4 T5 T1 T2 T3 T4 T5 T1 T2 T3 T4 T5 d.00
0.02
0.04
0.05
0.06
0.10
0.04
0.06
0.08
0.10
0.16
0.05
0.08
0.10
0.13
0.20
d.01
0.03
0.05
0.06
0.08
0.10
0.05
0.08
0.10
0.13
0.16
0.06
0.10
0.10
0.16
0.20
d.02
0.03
0.06
0.06
0.10
0.13
0.06
0.10
0.10
0.16
0.20
0.06
0.10
0.13
0.20
0.25
d.03
0.04
0.06
0.08
0.10
0.16
0.06
0.10
0.13
0.16
0.25
0.08
0.13
0.16
0.20
0.32
d.04
0.05
0.08
0.10
0.13
0.20
0.08
0.13
0.16
0.20
0.32
0.10
0.16
0.20
0.25
0.40
d.05
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
d.06
0.06
0.13
0.13
0.20
0.25
0.10
0.20
0.25
0.32
0.40
0.13
0.25
0.25
0.40
0.50
d.07
0.08
0.13
0.16
0.20
0.32
0.13
0.25
0.25
0.40
0.50
0.16
0.25
0.32
0.40
0.63
d.08
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
d.09
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
d.10
0.13
0.25
0.32
0.40
0.50
0.25
0.40
0.50
0.63
1.00
0.32
0.50
0.63
0.80
1.00
d.11
0.16
0.25
0.32
0.50
0.63
0.25
0.50
0.50
0.80
1.00
0.32
0.63
0.63
1.00
1.25
d.12
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
d.13
0.25
0.40
0.50
0.63
1.00
0.40
0.63
0.80
1.00
1.60
0.50
0.80
1.00
1.25
2.00
d.14
0.32
0.50
0.63
0.80
1.25
0.50
0.80
1.00
1.25
2.00
0.63
1.00
1.25
1.60
2.50
d.15
0.32
0.63
0.63
1.00
1.25
0.63
1.00
1.25
1.60
2.00
0.63
1.25
1.25
2.00
2.50
(Unit : Sec.)
Table 10. Sensor sensitivity number and exposure time in digital mode (at 4mA with long cone) patient teeth
Child Adult Obese
T1 T2 T3 T4 T5 T1 T2 T3 T4 T5 T1 T2 T3 T4 T5 d.00
0.04
0.06
0.08
0.10
0.16
0.06
0.10
0.13
0.16
0.25
0.08
0.13
0.16
0.20
0.32
d.01
0.05
0.08
0.10
0.13
0.20
0.08
0.13
0.16
0.20
0.32
0.10
0.16
0.20
0.25
0.40
d.02
0.06
0.10
0.13
0.16
0.25
0.10
0.16
0.20
0.25
0.40
0.13
0.20
0.25
0.32
0.50
d.03
0.08
0.13
0.13
0.20
0.25
0.10
0.20
0.25
0.32
0.40
0.13
0.25
0.25
0.40
0.50
d.04
0.08
0.13
0.16
0.25
0.32
0.13
0.25
0.25
0.40
0.50
0.16
0.25
0.32
0.50
0.63
d.05
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
d.06
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
d.07
0.16
0.25
0.32
0.40
0.63
0.25
0.40
0.50
0.63
1.00
0.32
0.50
0.63
0.80
1.25
d.08
0.16
0.32
0.32
0.50
0.63
0.32
0.50
0.63
0.80
1.00
0.32
0.63
0.63
1.00
1.25
d.09
0.20
0.32
0.40
0.50
0.80
0.32
0.63
0.63
1.00
1.25
0.40
0.63
0.80
1.00
1.60
d.10
0.25
0.40
0.50
0.63
1.00
0.40
0.63
0.80
1.00
1.60
0.50
0.80
1.00
1.25
2.00
d.11
0.32
0.50
0.63
0.80
1.25
0.50
0.80
1.00
1.25
2.00
0.63
1.00
1.25
1.60
2.50
d.12
0.40
0.63
0.80
1.00
1.25
0.63
1.00
1.25
1.60
2.50
0.80
1.25
1.60
2.00
2.50
d.13
0.40
0.80
0.80
1.25
1.60
0.63
1.25
1.25
2.00
2.50
0.80
1.60
1.60
2.50
3.20
d.14
0.50
0.80
1.00
1.25
2.00
0.80
1.25
1.60
2.00
3.20
1.00
1.60
2.00
2.50
* d.15
0.63
1.00
1.25
1.60
2.50
1.00
1.60
2.00
2.50
* 1.25
2.00
2.50
3.20
*
("*" 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 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 ▲ or ▼ switch, display changes to "bu.0".
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
Film Speed
Digital Imaging mA selection
Patient Type
: Regular cone
: "a"
: off
: 7 mA
: Adult
If necessary, these settings can 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.
N OTE : For digital imaging, 4 mA is recommended to get good contrast and precise
exposure time control.
SECTION 3 : DESCRIPTION FOR FUNCTIONS
[1] GENERAL
The Belmont Belray II 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 II 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.
CAUTION : DO NOT ATTEMPT TO DISASSEMBLE THESE ARMS IN THE FIELD.
-15-
[2] AUTOMATIC VOLTAGE REGULATOR
1. Belray II 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.
POWER MOS-FET
(FIELD EFFECT TRANSISITOR)
Q6∼9
5Vac
μCOMPUTER
#1 ON
POWER PCB
SQUARE
WAVE
COMPARATOR
μCOMPUTER
#2 ON
POWER PCB
REFERENCE
SINE WAVE
・ ・
RELAY
RY1
DROPPER
RESISTOR
・ ・
RELAY
RY2
DROPPER
RESISTOR
・
DEVIDING
RESISTOR
R76
・
DIVIDING
RESISTOR
R89
・ ・
OUTPUT
OF
AVR
(180±1Vac
at 7mA)
FIGURE 3. Block diagram of AVR circuit
[3] PRIMARY CIRCUIT OF HIGH VOLTAGE TRANSFORMER
1. Back reducer (parallel circuit of resistor and diode 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 adjusted 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, 00∼1F (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 500Ω) 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 TUBE 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 the exposure time display window.
6. Sellect 7mA and press the exposure switch to get a reading. It should be 180Vac ± 1Vac.
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 ± 1Vac.
CAUTION : MAKE SURE 7 mA IS SELECTED. IF 4 mA IS SELECTED,
VOLTAGE IN STEP #6 IS TOO HIGH AND HEAD WILL BE DAMAGED.
FIGURE 4A. JP3-2 and TP2 on Power PCB
JP3-2
VR1
TP2
-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. In this method the reference voltage for AVR circuit is adjusted.
1. Prepare a digital multimeter capable to measure 10 Vac within ±0.01Vac 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.
CAUTION : MAKE SURE 7 mA IS SELECTED. IF 4 mA IS SELECTED,
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 VR1, a pot near the TP3 test terminal, very slightly to make the voltage reading within 7.28∼7.32 Vac.
TP3 and VR1
TP2
FIGURE 4B. TP2, TP3 and VR1 on the Power Generating PCB
[2] INSPECTION OF TUBE CURRENT
Belray II 097 has two types of self measuring function for tube current, i.e., 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 500Ω) 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. 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 T1, T4 and T5 switches.
4. Make an exposure by depressing the exposure switch.
WARNING : 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. By 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. T1 tooth light comes on and tube current of the first pulse of the exposure 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 ±1 mA from the rated current, perform the e.XX adjustment.
-20-
c. 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 TP1 at lower left corner on the power PCB 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.
WARNING: 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 3.45×2 = 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.)
[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
1. 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.
2. 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 ▲ switch next to the exposure time display window and h.xx value displayed will be increased. If tube current is higher than +0.5 mA, press ▼ switch and decrease the h.xx value displayed. xx has 32 kinds of values, 00∼1F.
Next to 9 is A and consequently F equals to 15.
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 current 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-
3. Keep depressing P (patient), C (cone), F (film) button until "e.xx" is displayed on the exposure time window.
4. Select the tube current that should be adjusted.
5. Press T2 switch then display changes to "e.xx". xx is the value presently memorized.
6. If tube current is lower than -0.5 mA from the rated tube current at step 1, press ▲ 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 ▼ switch and e.xx value displayed will be decreased. e.xx has
32 kinds of values.
7. Press the patient switch to memorize the e.xx value displayed to the memory. If value is stored, electronic chime will should twice.
8. 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. If tube current is still out of the range, repeat step 2∼7 above.
[4] ADJUSTMENT OF LINE VOLTAGE MEASUREMENT 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 % as follows.
1. Turn on the main switch.
2. Keep depressing T2, T3 and T4 switches until "Pc.x" is displayed on the exposure time window.
3. Meaning of Pc value is as follows.
Pc.0 : No compensation is applied. ← 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 %.
4. If multimeter indicates 107∼110% of rated line voltage and ready lamp doesn't comes on, set to
"Pc.1" by depressing ▲ switch next to the exposure time display window.
5. If multimeter indicates 90∼93% of the rated line voltage and ready lamp doesn't comes on, set to
"Pc.2" by depressing ▲ switch next to the exposure time display window.
6. After the display becomes suitable value, press the patient switch to store the value in the memory on timer PCB. If the setting is stored, electronic chime will sound twice.
7. Turn off the main switch and wait for a while and turn on again.
8. 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 buzzer
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 ▲ switch next to the exposure time display window.
5. 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.
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 R (%) in the formula below.
R = (VN−VL) / VL ×100
R must not exceed the range of 0∼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-
[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) 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. e. Fully tighten bottom mounting bolt.
NOTE : Slight tendencies to drift can be corrected by tightening brake screw in horizontal arm.
Do not tighten beyond what is required to prevent drift.
FIGURE 5.
(2) BALANCE ARM TENSION ADJUSTMENT
1. Place the balance arm assembly into position.
2. If either balance arm drifts higher or lower from the set position, remove the spring adjuster cover and adjust the balance arm spring tension with 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 (ø3 x 8mm tapping screw) and remove the yoke side cap.
2. Adjust the six brake screws using a screw driver.
3. After adjustment, reattach the yoke side cap and screw.
(4) MECHANICAL SAFETY
FIGURE 7.
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.
CODE MEANING
POSSIBLE CAUSE CHECK POINT SOLUTION a. Operator's fault.
E.00 Exposure switch is released
before the exposure
terminates.
Instruct operator to release the
exposure switch after the exposure
lamp turns off. b. Exposure switch or the coil cord
for exposure switch 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.
E.01 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.
E.02 Line voltage is less than 90
% of rated voltage.
E.03 Line voltage is more than
110% of rated voltage. a. Line voltage is less than 90% of the rated voltage. 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.
Measure the incoming voltage between
terminal L and N of terminal block in
the control box. 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. 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 less than 90% of the rated voltage, correct the voltage with additional step-up transformer.
If line voltage is close to 90% of rated voltage but over 90%, set
PC.x setting to PC.2. (Press T2·
T3·T4 and power switch for PC.x setting mode.)
If line voltage is more than 110% of rated voltage, correct the voltage with additional step-down transformer.
If line voltage is close to 110% of
the rated voltage but less than 110%,
set PC.x to PC.1. (Press T2·T3·T4
and power switch for PC.x setting
mode.)
-25-
CODE MEANING
E.04 Excess line current during
exposure.
E.05 Tube current of the last
pulse is less than 3mA at
4mA setting or less than
5.25mA at 7mA setting.
POSSIBLE CAUSE a. Tube head is internally shorted. b. Cables between the control box
and head are short circuited. c. Power PCB is defective.
AVR voltage is too low.
AVR voltage is too high.
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.
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.
Disconnect the wires from power
PCB (CN4 and CN5) and make
an exposure.
If E.04 still comes, power PCB may
be defective. Change the power
PCB.
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 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.
Refer to CHECK POINT of E.05 Refer to SOLUTION of E.05
E.06 Tube current of the last
pulse is more than 5mA at
4mA setting or more than
8.75mA at 7mA setting.
E.07 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 E.05 b. Cables between the control box
and head are broken or mis-wired. c. Power PCB is defective.
Check each cables for continuity and
mis-wiring.
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. d. Defect of tube head. (Filament
damage.)
If AVR voltage and cable are all right,
tube head may be defective.
Refer to SOLUTION of E.05
Correct the cable.
Change the power PCB and check
AVR voltage or TP2 - TP3 voltage
again.
Change the tube head and confirm
the function again.
-26-
CODE MEANING
POSSIBLE CAUSE CHECK POINT SOLUTION
E.08 Tube current during
exposure is more than
6mA at 4mA setting or
more than 10.5mA at
7mA setting. a. AVR voltage is too high. b. Cables between the control box
and head are broken or mis-wired.
Refer to CHECK POINT of E.05
Check each cables for continuity and
Mis-wiring.
Refer to SOLUTION of E.05
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.
If AVR voltage and cable are all right,
then tube head may be defective.
Change the tube head and confirm
the function again.
E.09 Malfunction of the micro-
computer.
E.10 Exposure switch or exposure
switch circuit is ON, when
main power switch is turned
ON.
E.11 Tube current is detected
during pre-heating period. d. Defect of tube head.
(Internal short)
Memory setting for lower limit of line
voltage is higher than the higher limit
of line voltage.
Exposure switch or the coil cord for
exposure switch is defective.
High voltage is applied to x-ray tube
during pre-heating period.
Check the L.xx value and H.xx
values in the line voltage limit setting
mode. (Press T1·T3·T5 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 E.03. If these values
cannot be adjusted, display PCB
may be defective.
Turn off the main switch and disconnect
form the timer PCB. Turn on the
main switch again.
Turn off the main switch and wait for a
while. 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.
If E.11 still appears, change the
power PCB.
E.12 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. Turn on the main switch again.
If E.12 still appears, change the
power PCB.
E.22 Failure of communication
between power PCB and
time PCB. controller is depressed when the power switch is turned on.
Electrical noise makes mis-
communication.
Some switch on the timer PCB
is defective.
Turn off the main switch and wait for
Approximately 2 min. Turn on again.
If E.22 still appears, check the
cable between the PCBs.
Turn off the main switch and wait for
Approximately 2 min. Turn on again.
If E.23 still appears, change the
Timer PCB.
-27-
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.
PROBLEM POSSIBLE CAUSE CHECK POINT SOLUTION
1. "FIN" doesn't appear in the tube
current confirmation mode. (P.19
of installation manual)
2. AVR voltage cannot be adjusted
to 94.5 Vac in the "Adj" mode.
3. Exposure does not start when
exposure switch is depressed.
4. Radiograph is too dark or too light.
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 P·T2·T3
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 e.xx values
manually. (Press P·C·F and power
switch for manual setting 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. 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". a. Exposure time is too long or too
short.
Check the exposure time display
window.
Check the tooth, patient, cone and film
type are adequate.
Press a tooth switch or manual
setting switch for exposure time.
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. c. Tube current is too high or too low.
Check the tube current. (Refer to page
16 of this manual.)
Correct the processing condition.
If tube current is out of ± 0.5mA,
adjust h.xx and e.xx value.
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. Since 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.
WARNING : 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-
SECTION 9 : CIRCUIT DIAGRAM
-30-
NOTE
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
R
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