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Technician's instructions KaVo In eXam 3510
4 Troubleshooting for service
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4.2 Measurements
4.2.2 Measure resistance on the main board
Test point [name]
Test point [name]
Range
27 [0 kV]
28 [+ kV]
10.6 < ...< 12.6 Ω
20 [0 mA]
21 [RTN mA]
1 kΩ
20 [0 mA]
J2 - 8 [PWR ARM]
~ 0 Ω
20 [0 mA]
J2 - 7 [PWR ARM]
~ 0 Ω
20 [0 mA]
J2 - 6 [PWR ARM]
~ 0 Ω
20 [0 mA]
J2 - 3 [PWR ARM]
∞
20 [0 mA]
J6 - 1 [CTRL ARM]
~ 3 kΩ
J2 - 1 [PWR ARM]
J2 - 3 [PWR ARM]
~ 0 Ω
Note
If at least one value is incorrect, the supply electronics or the arm cable can be
detected.
Disconnect the arm cable
Test point [name]
Test point [name]
Range
27 [0 kV]
28 [+ kV]
86.5 < ...< 95.5 Ω
20 [0 mA]
21 [RTN mA]
1 kΩ
20 [0 mA]
J2 - 8 [PWR ARM]
~ 0 Ω
20 [0 mA]
J2 - 6 [PWR ARM]
~ 0 Ω
20 [0 mA]
J2 - 3 [PWR ARM]
∞
20 [0 mA]
J6 - 1 [PWR ARM]
∞
1 [0 V]
3 [G 1]
10 kΩ
2 [0 V]
4 [G 2]
10 kΩ
6 [Tr 1]
5 [G 4]
10 kΩ
7 [Tr 2]
8 [G 5]
10 kΩ
Note
If at least one value lies outside of the tolerance range, the supply electronics must
be exchanged.
Cable disconnected
Colour / Test Point
Colour / Test Point
Value Tolerance
blue / J2-6
red / J6-2
∞
blue / J2-6
yellow / J6-4
12 < …< 14.6 kΩ
blue / J2-6
green / J6-1
3 kΩ
blue / J2-6
purple / J2-7
~ 0 Ω
blue / J2-6
brown / J2-1
∞
blue / J2-6
gn/yl/ / J2-8
~ 0 Ω
gn/yl/ J2-8
brown / J2-1
∞
gn/yl/ J2-8
shielding / J6-3
~ 0 Ω
brown / J2-3
orange / J2-3
~ 0 Ω
Note
If at least one value lies outside of the tolerance range, exchange the arm cable or
x-ray head.
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