Sirona Orthophos Plus Maintenance instructions

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Maintenance Instructions Sirona Dental Systems GmbH

ATTENTION !

Proper shielding of room and operator position is
essential.
Since these requirements vary from state to state it is
the assembler's/installer's responsibility that all local
radiation safety requirements are met.

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Sirona Dental Systems GmbH Maintenance Instructions

General

To stay in compliance with the DHHS requirements the ORTHOPHOS® Plus / Plus Ceph must be main­tained annually following date of installation.
It is the responsibility of the user to insure that the equipment is maintained with the manufacturer's recom­mended Maintenance Instructions to insure compliance with the Federal Performance Standard.
The manufacturer and the assembler/installer are relieved from responsibility in those cases where non­compliance with the standard results from the user's failure to have t he manufacturer's recommended main­tenance performed.
The actual maintenance inspection and consequent service must be accomplished by a trained serviceman.
Neither the inspection nor service is part of the equipment warranty.

Technical instructions required

Operating Instructions
Service Manual

Instruments and adjustment tools required

1. Digital multimeter Philips PM 2816 rms, Fluke 8000 A, or equivalent.
Accuracy: DC voltage ± 0.1 % of reading plus 0.02% of range

DC current ± 0.4 % of reading plus 0.1% of range

2. Electromechanical pulse counter,
model KESSLER ELLIS KT 203 ±1 pulse, or equivalent.

3. Adjustment set with alignment tool for X-ray beam, test block, needle phantom delivered with the unit

(customer's property).

CAUTION RADIATION

Observe radiation protection guidelines as outlined in the Operating Instructions!
X-rays are generated, when the exposure button at the Multitimer is depressed.

Caution serviceman!

All PC-boards are fitted with electronic components sensitive to electrostat ic discharge (ESD).
Electrostatic charges are unavoidable due to friction of clothing, carp eting etc.

To prevent damage of electron ic components do not touch
same without putting on the unit mounted special wristlet.

Always handle circuit boards by the edge of same.

ESD

List of Contents Page

General 3
Visual Check 4
Light Indicators and Audible Sound 5 – 6
Power Supply Adequacy 7
kV-Verification 8 – 9
Tube Current Verification 10
Exposure Time Verification 11
Checking and Adjusting the X-Ray Beam for Panorama Exposure 12 – 13
Checking the AES 14 – 15
Phantom Radiograph 16
Checking the Ear Olives and Zero Position of Head Positioner 17
Checking the X-Ray Beam for Tele-Exposure 18
Yearly Maintenance Checklist appendix

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Maintenance Instructions Sirona Dental Systems GmbH

SIRONA

Model-No. 59 68 573 D 3200
Serial-No

lll 90kV 12mA DC

↓

2.5 Al / 80 IEC 522 1976

X-ray
head

Tube

By 257 / 82 Rö - Typ X 1426
Röhre / Tube

Siemens SR 90 / 15 FN
Model-No. 11 17 340 V 1010
Serial-No

0.5 IEC 336 / 82



MADE IN GERMANY

Model­No.

Serial­No.

Model­No.

Serial­No.

Model­No.

Serial­No.

SIRONA

15 38 177 D 3200

SIRONA

46 80 364 D 3297

MADE IN GERMANY

Multitimer

SIRONA

14 48 450 D 3200

MADE IN GERMANY

Test block is part of
'Adjustment Set'

Test
block

X-RAY

For identi­fication
turn wheel
clockwise.

Diaphragm 1
5 in. or 6 in.

Diaphragm 2

Diaphragm 3
10 in. or 8 in.

Diaphragm 4

Diaphragm 11

Model-No. 18 88 408 D3200
Serial-No.

Model-No. 18 88 382 D3200
Serial-No.

Model-No. 18 88 424 D3200
Serial-No.

Model-No. 18 88 366 D3200
Serial-No.

Model-No. 51 65 365 D3297
Serial-No.

Unit

Model­No.

Serial­No.

D 3297

MADE IN GERMANY

SIRONA

Visual Check

• Look for mechanical damage possibly affecting radiation safety.

• Verify that all labels are affixed and legible.

Defaced labels must be replaced.
Order same from Sirona (address, see rear)
in writing stating: Customer Name

Customer Address
All Model Numbers with Serial Numbers
still legible on the unit for identification purposes.

For serial numbers see also Installation Report / Warranty Passport.

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Sirona Dental Systems GmbH Maintenance Instructions

1.

C Ceph-mode

only

Unit ON LED

A

B

X-RAY

Ready LED

Multitimer

Light Indicators and Audible Sound at the Unit.

• Unit ON LED:
Depress the main switch (1) into the ”
The ”Unit ON LED” in the upper left corner of the Multitimer will then indicate that the unit is ON.
The unit adjusts itself automatically, wait about 1 minute.

• Digital displays at the Multitimer:
The program and exposure parameters employed with the last patient appear.

A shows you sequentially the P1 through P16 (P23) panoramic exposure programs and th e

respective maximum exposure time. Press – + pro gram bottons for correct display check.

B gives you the kV/mA matched value pair. The LED over the respective patient symbol must light up.
C C lights up, when Ceph–mode is selected.

Ready LED over the return button R must blink (When Ready LED blinks, unit is not

I” position.

ready).

+

V8 - V11

–

• Digital displays at the control panel:

- The mm value of height adjustment between 000 and 640 from t he last patient.

- The basic forehead support value of 10.0 mm.

- LED indication help messages

- Anomaly button LEDs
See also Operating Instructions under ”Preparing the Exposure” subchapter

”Switching ON the Unit”.

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Maintenance Instructions Sirona Dental Systems GmbH

Multitimer

Radiation
indication

X-ray

CAUTION RADIATION !
Observe
Radiation Protection Guide Lines

see Operating Instructions

Exposure
button

X-RAY

kV

mA

Ready LED
Return button R

• Make a panorama exposure: (Ceph–mode not selected)

- X-ray head must be in the initial position (Press return button R).

- Insert the panorama film cassette into the carriag e and swing in the cassette holder. The Ready LED
must go out. For more details and possible error messages see Operating Instructions.

- Set the P1 exposure program using the upper

- Select 69kV/15mA using the lower

– + buttons.

– + buttons.

- CAUTION RADIATION. Depress the exposure button and hold until the exposure terminates au­tomatically
The exposure ends when rotation and radiation automatically switch off.
The radiation indication X-ray
Simultaneously an audible beep

• Interrupt an exposure

– deadman feature:

must light up during the exposure period.

must sound at the unit.

- Observe a cool-off time of 5 mins. between exposures (automatic exposure blockage).

- Setting same as above. Remove and reinsert the film cassette. The Ready LED must go out.

- CAUTION RADIATION. Depress the exposure button until

X-ray lights up and subsequently r elease

– the exposure must terminate immediately. The Ready LED blinks.

• Defective light indi cators con stitute a saf ety hazar d to the pati ent as well as to the operator. The
user is not permitted to use the unit, until repairs are made !

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Sirona Dental Systems GmbH Maintenance Instructions

1.

ON

door

metal cover

K1

N
L

3.

2.

300VAC

N
L

Terminal strip

main cable

5. – 8.

see Operating Instructions

4.

Power Supply Adequacy

• To determine power supply adequacy, the line voltage drop during exposure must be measured.

1. Be sure power cord is not plu gged in! Op en door and r emov e metal co ve r (2 scre ws) .

2. Select 300VAC line voltage range on multimeter.

3. Connect measuring leads to terminal K1, L and N.

4. Plug in power cord and switch unit ON, see Operating Instructions.

5. Press button R at the Multitimer to return X-ra y tube head into the initial p osition.

6. Remove and reinsert the film cassette.The Ready LED at the Multitimer must now go out.

7. Select P1 prog ram and 90kV/12mA at the Multitimer .

8. CAUTION RADIATION! - Depress the exposure button at the Multitimer until meter reading is obtained.

Line voltage Max. permissible
no load: 187 – 200V line voltage drop: 8V

201 – 220V 9V
221 – 240V 10V
241 – 264V 11V

•- - Record reading. Turn unit OFF and remove meter leads.

•If the volta
ply must be installed. Refer to Pre-I nstallation In structions. Disconn ect unit and do not release f or use!

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ge drop is not within the specified range advise the customer, that an adequate power sup-

7

Maintenance Instructions Sirona Dental Systems GmbH

3.

ON

1.

DX1

KV–

4. – 5.

2.

20VDC

com.

KV+

KV+

KV –

see Operating Instructions

kV – Verification, kV–ramp during panoramic exposure

• During exposure the kV is encreased in the central region depending on kV/mA selected up to 17%.
This increase can be measured in VDC.

1. Remove covers . F or details see Service Manual.

2. Connect digital v oltmet er to KV+ and KV– a nd select range 20 VDC .

3. Switch unit ON. The X-ray head must be in the initial position (return button R),temple support fully

open.

4. Select P1 prog ram and 73kV/15mA at the Multit imer. Ready LED above button R must be out.

5. CA UTION RADIATION! - Depress the exposu re b utton until the e xposure terminates automatically.

• The followin
up to 5.25 seconds: 7.3 V ±0.4V,
from 6.25 to 7.85 s: 8.03 V ±0.1V,
after 8.85 seconds: 7.3 V±0.4V.

• Turn unit OFF and remove meter leads.

• If specified values cannot be obtained
Incorrect”

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g values must be obtained – see also diagram on next page.

, see Service Manual, ”Radiograph Density in Central Region

54 72 118 D 3297

Sirona Dental Systems GmbH Maintenance Instructions

VDC

ramp

nominal 7.3V

9
8
7

max. 7.7V

min. 6.9V

1.6s
ramp

max. 8.1V

min. 7.9V

nominal 8.0V

6
5
4
3

7.05s

2

6.25 7.85

5.25s 8.85s

14.1s
complete P1
exposure time

1

1 104 5 6 7 8 9 11 12 13 143

kV – ramp diagram

with program P1 and 73kV/15mA set on the Multitimer and temple support fully open.

s exposure time0 2

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