Belmont Phot-x ii s 505 User manual

MODEL 505

DENTAL X-RAY

Service Manual

○

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Index

１．Adjustment required when parts are replaced .................................3

２．Method to measure mA and kV. .....................................................................3

３．Error Code.........................................................................................................................3

3.1 Error Code: E.00 ............................................................ 3

3.2 Error Code: E.01 ............................................................ 4

3.3 Error Code: E.02 ............................................................ 4

3.4 Error Code: E.03 ............................................................ 4

3.5 Error Code: E.05 ............................................................ 5

3.6 Error Code: E.06 ............................................................ 5

3.7 Error Code: E.07 ............................................................ 6

3.8 Error Code: E.08 ............................................................ 7

3.9 Error Code: E.09 ............................................................ 8

3.10 Error Code: E.10 ........................................................... 8

3.11 Error Code: E.11 ........................................................... 8

3.12 Error Code: E.12 ........................................................... 8

3.13 Error Code: E.14 ........................................................... 9

3.14 Error Code: E.15 ........................................................... 9

3.15 Error Code: E.16 .......................................................... 10

3.16 Error Code: E.17 .......................................................... 10

3.17 Error Code: E.19 .......................................................... 11

3.18 Error Code: E.20 .......................................................... 11

3.19 Error Code: E.22 .......................................................... 12

3.20 Error Code: E.23 .......................................................... 12

3.21 Others ................................................................... 12

４．Setting Mode ..................................................................................................................14

4.1 Film type, digital mode and priority light ...................................... 14

4.2 Tube current adjustment value ............................................... 14

4.3 Tube voltage adjustment value ................................................ 15

4.4 Electronic chime ON/OFF ................................................... 15

4.5 Manual setting of preheating power ........................................... 16

4.6 Automatic adjustment of preheating power ..................................... 16

4.7 Setting the automatic lock ................................................... 17

4.8 Setting the standard density value for each tooth ................................ 17

4.9 Viewing the setting ......................................................... 17

4.10 Error History ............................................................. 18

4.11 Number of Exposures ...................................................... 19

4.12 Estimated Air Kerma Display Setting ......................................... 19

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５．Exposure time ...............................................................................................................19

5.1 Assignable exposure time .................................................... 19

5.2 Exposure time in the automatic setting mode .................................... 19

5.2.1 Exposure Time Settings (60kV, 3mA, Short Cone) ................................ 20

5.2.2 Exposure Time Settings (60kV, 6mA, Short Cone) ................................ 20

5.2.3 Exposure Time Settings (70kV, 3mA, Short Cone) ................................ 21

5.2.4 Exposure Time Settings (70kV, 6mA, Short Cone) ................................ 21

5.2.5 Exposure Time Settings (60kV, 3mA, Long Cone) ................................ 22

5.2.6 Exposure Time Settings (60kV, 6mA, Long Cone) ................................ 22

5.2.7 Exposure Time Settings (70kV, 3mA, Long Cone) ................................ 23

5.2.8 Exposure Time Settings (70kV, 6mA, Long Cone) ................................ 23

5.2.9 Exposure Time Settings (60kV, 3mA, Short Cone + Rectangular Collimator) ......... 24

5.2.10 Exposure Time Settings (60kV, 6mA, Short Cone + Rectangular Collimator) ........ 24

5.2.11 Exposure Time Settings (70kV, 3mA, Short Cone + Rectangular Collimator) ........ 25

5.2.12 Exposure Time Settings (70kV, 6mA, Short Cone + Rectangular Collimator) ........ 25

5.2.13 Exposure Time Settings (60kV, 3mA, Long Cone + Rectangular Collimator) ........ 26

5.2.14 Exposure Time Settings (60kV, 6mA, Long Cone + Rectangular Collimator) ........ 26

5.2.15 Exposure Time Settings (70kV, 3mA, Long Cone + Rectangular Collimator) ........ 27

5.2.16 Exposure Time Settings (70kV, 6mA, Long Cone + Rectangular Collimator) ........ 27

６．Parts replacement......................................................................................................28

6.1 Head ....................................................................... 28

Adjustment after exchanging the x-ray head ........................................ 28

6.2 Power PC board ............................................................. 29

Adjustment after exchanging the power PC board (mA adjustment) ..................... 30

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１．Adjustment required when parts are replaced

Following two kinds of adjustment are necessary if the x-ray head or PC board is replaced.

Replacedpart

Adjustment Head Timer PC board Power PC board

Change the CP value as indicated on the head yoke.

[Refer to section 3.3.] Necessary Necessary Not Necessary

Automatic adjustment of preheating power

[Refer to section 3.6.] Necessary Necessary Necessary

２．Method to measure mA and kV.

Actual tube current (mA) and tube potential (kV) can be checked by the following procedure.

1. Turn the main switch on and set the exposure time at 1 sec. and 60 kV, 3 mA

2. Make an exposure and keep the exposure switch depressed continuosly after the exposure is over.

3. Keeping the exposure switch depressed, press kV selection switch twice. KV measured value will be

displayed on the LED window. This value should be 60±5 kV.

4. Keeping the exposure switch depressed, press mA selection switch twice. MA measured value will be

displayed on the LED window. This value should be 3±1 mA.

5. Release the exposure switch and change the setting to 70 kV, 6 mA.

6. Make an exposure and keep the exposure switch depressed continuosly after the exposure is over.

7. Keeping the exposure switch depressed, press kV selection switch twice. KV measured value will be

displayed on the LED window. This value should be 70±5 kV.

8. Keeping the exposure switch depressed, press mA selection switch twice. MA measured value will be

displayed on the LED window. This value should be 6±1 mA.

３．Error Code

3.1 Error Code: E.00

Meaning

The exposure switch was released during x-radiation.

To release

Press either button for tooth selection.

Measures

Explain that the operator must continue pressing the exposure switch until the exposure light goes out (and

alarm stops sounding).

If not resolved

Possible cause

Contact failure of the exposure switch or contact failure occurred due to disconnection in a curl cord of a

hand switch during the exposure.

Verification

Take the exposure switch or the hand switch from the timer PC board and check continuity of the cables.

(Pay special attention to the cord bush and connectors.)

Solution

Replace the exposure switch or the hand switch if any failure is found.

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3.2 Error Code: E.01

Meaning

The exposure switch was pressed within three seconds after power-on.

The exposure switch was pressed within ten seconds after previous exposure.

To release

Release the exposure switch to restore the original state.

Solution

Explain that the operator must wait to press the exposure switch for three seconds after power-on (until the

ready light is on) and that exposure is allowed only after an interval 30 times the length of the last exposure

time.

If not resolved

Possible cause

Contact fault occurred in the exposure switch or contact failure occurred due to disconnection in a curl cord

of a hand switch in the middle of exposure.

Verification

Take the exposure switch or the hand switch from the PC board and check continuity of the cables. (Pay

special attention to the cord bush and connectors.)

Solution

Replace the exposure switch or the hand switch if any failure is found.

3.3 Error Code: E.02

Meaning

The exposure switch was pressed when the line voltage was less than 90% of the rated voltage.

To release

Release the exposure switch to restore the original state.

Verification

Measure the voltage between L and N of the power supply terminal block.

Solution

Increase the line voltage using a step-up transformer if the supply voltage is less than 90% of the rated

voltage.

If not resolved (or if line voltage is within ±10% of rated voltage.)

Possible cause

The memory is out of order.

Verification

Check C.XX setting at overview mode. (Refer to section 3.9.)

Solution

If C.7F is displayed, memory is out of order and timer PC board should be replaced.

3.4 Error Code: E.03

Meaning

The exposure switch was pressed when the supply voltage was more than 110% of the rated voltage.

To release

Release the exposure switch to restore the original state.

Verification

Measure the voltage between L and N of the power supply terminal block.

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Solution

Decrease the voltage using a step-down transformer if the supply voltage is more than 110% of the rated

voltage.

If not resolved (or if the line voltage is within the range of ±10% of rated voltage.)

Possible cause

The memory is out of order.

Verification

Check C.XX setting at overview mode. (Refer to section 3.9.)

Solution

If C.7F is displayed, memory is out of order and timer PC board should be replaced.

3.5 Error Code: E.05

Meaning

Tube current before termination of exposure was less than 2 mA (when 3 mA is selected) or less than 4.5 mA

(when 6 mA is selected).

To release

Turn off the main power switch and confirm all displays go off. Then turn on again.

Verification

Make an exposure for 0.05 seconds and check the tube current.

①After exposure, do not release the exposure switch. Press the mA button twice while holding down the

exposure switch.

②Keep holding down the exposure switch and check that the T5 light is on and the indication of the

seven-segment LED.

Solution

If seven-segment LED displays not more than 1.9 mA (when 3 mA is set) or not more than 4.2 mA (when 6

mA is set), increase the setting value for h.XX. (Refer to section 3.5.)

If not resolved

Possible cause 1

If seven segment LED displays not more than 1 mA, the power PC board or the head is out of order.

Solution

X-ray head should be changed. If the tube current is not more than 1 mA after the head is replaced,

change the power PC board.

Possible cause 2

If seven segment LED displays more than 1 mA, but not more than 1.9 mA (when 3 mA is set) or not more

than 4.2 mA (when 6 mA is set), tube current might be low at transient period of exposure.

Solution

X-ray head should be changed.

Possible cause 3

The tube current adjusting value is not properly adjusted.

Solution

Increase the setting value for EP.X. (Refer to section 3.2.)

3.6 Error Code: E.06

Meaning

Tube current immediately before termination of exposure was more than 4 mA (when 3 mA is selected) or

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more than 7.5 mA (when 6 mA is selected).

To release

Turn off the main power switch and confirm all displays go off. Then turn on again.

Verification

Make an exposure for 0.05 seconds and check the tube current.

①After exposure, do not release the exposure switch. Press the mA button twice while holding down the

exposure switch.

②Keep holding down the exposure switch and check that the T5 light is on and the indication of the

seven-segment LED.

Solution

If seven-segment LED displays not less than 4.1 mA (when 3 mA is set) or not less than 7.6 mA (when 6 mA

is set), decrease the setting value for h.XX. (Refer to section 3.5.)

If not resolved

Possible cause 1

The tube current adjusting value is not properly adjusted.

Solution

Decrease the setting value for EP.X. (Refer to section 3.2.)

Possible cause 2

The power PC board or the head is out of order.

Verification

Replace the head and check whether the same symptom (Error code E.06) appears again.

Solution

If the same symptom appears, the cause of the error is presumed to lie in the power PC board. In this

case, replace the power PC board. If the exposure turns out to be normal, the cause is presumed to lie in

the x-ray head.

3.7 Error Code: E.07

Meaning

Tube current during the exposure dropped to 1.5 mA or less (when 3 mA is set) or 3 mA or less (when 6 mA is

set).

To release

Turn off the main power switch and confirm all displays go off. Then turn on again.

Verification

Make an exposure for 0.05 seconds and check the tube current.

①After exposure, do not release the exposure switch. Press the mA button twice while holding down the

exposure switch.

②Keep holding down the exposure switch and check that the T5 light is on and the indication of the

seven-segment LED.

Solution

If seven-segment LED displays not more than 1.4 mA (when 3 mA is set) or 2.9 mA (when 6 mA is set),

increase the setting value for h.XX. (Refer to section 3.5.)

If not resolved

Possible cause 1

The arm cable (power line for filament of x-ray tube) is broken.

Verification

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Disconnect the arm cable from the head (10P connector) and the power PC board (8P connector) and

check continuity of the cable.

1. between #4 (head side) and #4 (power PC board side)

2. between #8 (head side) and #7 (power PC board side)

3. between #9 (head side) and #8 (power PC board side)

Solution

Replace the arm in question (horizontal or balance arm) if any failure is found.

Possible cause 2

The arm cable (tube current feedback line) is broken.

Verification

Disconnect the arm cable from the head (10P connector) and the power PC board (8P connector) and

check continuity of #1 (head side) and #2 (power PC board side).

Solution

Replace the arm in question (horizontal or balance arm) if any failure is found.

Possible cause 3

If seven segment LED displays not more than 1 mA, the power PC board or the head is out of order.

Solution

X-ray head should be change. If the tube current is not more than 1 mA after the head is replaced,

change the power PC board.

Possible cause 4

If seven segment LED displays more than 1 mA, but not more than 1.4 mA (when 3 mA is set) or not more

than 2.9 mA (when 6 mA is set), tube current might be low at transient period of exposure.

Solution

X-ray head should be changed.

3.8 Error Code: E.08

Meaning

Tube current during exposure rose to 20 mA or above.

To release

Turn off the main power switch and confirm all displays go off. Then turn on again.

Verification

Make exposures for 0.1 seconds and check whether the same symptom appears every time.

Solution

Decrease the setting value for h.XX. (Refer to section 3.5.)

If not resolved

Possible cause

The power PC board or the head is out of order.

Verification

Replace the head and check whether the same symptom (Error code E.08) appears again.

Solution

If the same symptom appears, the cause of the error is presumed to lie in the power PC board. In this case,

replace the power PC board. If the exposure turns out to be normal, the cause is presumed to lie in the

head.

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3.9 Error Code: E.09

Meaning

The set value for the preheating power is abnormal when the power is turned on.

To release

Turn off the main power switch and confirm all displays go off. Then turn on again.

Solution

Set the h.XX value to “h.10” at all conditions (60 kV/3 mA, 70 kV/3 mA, 60 kV/6 mA, 70 kV/6 mA). If the

same symptom (E.09) does not appear when the power is turned on again, set the CP value (see 3.3) and

perform automatic adjustment of preheating power (see 3.6).

If not resolved

Possible cause

The timer PC board (EEPROM) is out of order.

Verification

Replace the timer PC board and check whether the same symptom (Error code E.09) appears again.

Solution

If the error code disappears, the timer PC board is presumed to be the cause. Replace it.

3.10 Error Code: E.10

Meaning

The exposure switch is already on, when the power switch is turned on.

To release

Turn off the main power switch and confirm all displays go off. Then turn on again.

Verification

Power on after disconnecting CN2 on the timer PC board and check whether the same symptom (E.10)

appears. If the hand switch is used, disconnect CN3 as well.

Solution

If the same symptom (Error code E.10) appears even after the connector is disconnected, the cause of the error

is presumed to lie in the timer PC board. In this case, replace the timer PC board. If the E.10 does not appear,

the cause is presumed to lie in the contact fault in the exposure switch. In this case, replace the exposure

switch. If a hand switch is used, connect either of the connectors and check it.

3.11 Error Code: E.11

Meaning

Tube current of 2 mA or more is detected during preheating.

To release

Turn off the main power switch and confirm all displays go off. Then turn on again.

Solution

There is a failure in the power PC board. Replace the PC board.

3.12 Error Code: E.12

Meaning

Tube current of 1 mA or more is detected when main power switch is turned on.

To release

Turn off the main power switch and confirm all displays go off. Then turn on again.

Solution

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There is a failure in the power PC board. Replace the PC board.

3.13 Error Code: E.14

Meaning

Tube voltage immediately before termination of exposure was less than 50 kV (when 60 kV is set) or less than

60 kV (when 70 kV is set).

To release

Turn off the main power switch and confirm all displays go off. Then turn on again.

Verification

Make an exposure for 0.05 seconds and check the tube voltage.

①After exposure, do not release the exposure switch. Press the kV button twice while holding down the

exposure switch.

②Keep holding down the exposure switch and check that the T5 light is on and the indication of the

seven-segment LED.

Solution

If seven-segment LED displays not more than 50 kV (when 60 kV is set) or not more than 60 kV (when 70 kV

is set), increase the setting value for CP.X. (Refer to section 3.3.)

If not resolved

Possible cause

The power PC board or the head is out of order.

Verification

Replace the head and check whether the same symptom (Error code E.14) appears again.

Solution

If the same symptom appears, the cause of the error is presumed to lie in the power PC board and it

should be replaced. If the exposure turns out to be normal, the cause is presumed to lie in the head.

3.14 Error Code: E.15

Meaning

Tube voltage immediately before termination of exposure was higher than 70 kV (when 60 kV is set) or 80 kV

(when 70 kV is set).

To release

Turn off the main power switch and confirm all displays go off. Then turn on again.

Verification

Make an exposure for 0.05 seconds and check the tube voltage.

①After exposure, do not release the exposure switch. Press the kV button twice while holding down the

exposure switch.

②Keep holding down the exposure switch and check that the T5 light is on and the indication of the

seven-segment LED.

Solution

If seven-segment LED displays not less than 70 kV (when 60 kV is set) or not less than 80 kV (when 70 kV is

set), decrease the setting value for CP.X. (Refer to section 3.3.)

If not resolved

Possible cause

The power PC board or the head is out of order.

Verification

Replace the head and check whether the same symptom (Error code E.15) appears again.

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