KaVo ORTHOPANTOMOGAPH OP 2D, Service Manual

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1. General Information
ORTHOPANTOMOGAPH OP 2D 5
1.6 Yearly maintenance
The following tests and inspections must be carried out
annually by an authorized service person to verify that
the unit meets the speci fi cations and performance crite-
ria essential for correct and safe operation.
When taking measurements that require a multimeter,
always use a digital multimeter (DMM).
Exposure switch and cable
Check that the exposure switch and cable are not dam-
aged. Check that the exposure switch button does
not stick down when pressed. Take a test exposure
to check that the exposure switch functions correctly.
Replace the exposure switch and cable if they are dam-
aged or do not function correctly.
mA test
WARNING: X-rays are generated when this test is car-
ried out. PROTECT YOURSELF FROM RADIATION.
1. Connect the +probe of a DMM to test pin TP18
(mAfb) and the -probe to TP17(GND) on the L1800
Generator board.
WARNING: When the EMC shield is removed high
voltage parts are accessible. Special attention is
required: DO NOT to touch the high voltage parts on
the L1800 and P1910 boards.
2. Select service command exp and an exposure time
of 2000 ms (refer to section 5. S2terminal and ser-
vice functions, in this manual).
3. Protect yourself from radiation and take an expo-
sure. Check the feedback values from the DMM.
The feedback values must be within the tolerance.
Selected mA mAfb (V) Tolerance (V)
6 1.2 ±0.15 (1.05 - 1.35)
8 1.58 ±0.15 (1.43 - 1.73)
10 2.0 ±0.15 (1.85 - 2.15)
12 2.4 ±0.15 (2.25 - 2.55)