COMPACT 7600 Periodic Maintenance, 00-878852-01
3
4.4 Inspect/Adjust System Power Supply Voltages
WARNING Electrical circuits inside the equipment use voltages that are capable of causing serious
injury or death from electrical shock. Use appropriate precautions.
1. The power supplies for the system are located in a perforated metal enclosure on the left side of
the generator cabinet. There are two separate power supplies in the enclosure.
2. Locate the output voltage wire bundle coming from the top power supply (NG1). This wire
bundle exits the enclosure on the left side and has a 15-pin connector on the end of the bundle.
The 15-pin connector is designated as P1. Measure the voltages listed below and record them on
the PM Form.
GND
To
Adjust
Voltage
Tolerance
P1-2
P1-5
Not Adjustable
+5V
±
0.5V
P1-2
P1-4
Not Adjustable
+24V
±
1V
P1-2
P1-1
R39
+16V
±
1V
P1-11
P1-10
Not Adjustable
+16V
±
1V
P1-11
P1-13
Not Adjustable
+5V
±
0.5V
3. Locate the output voltage wire bundle coming from the bottom power supply (NG2). This wire
bundle exits the enclosure on the left side and has a 9-pin connector on the end of the bundle.
The 9-pin connector is designated as P2. Measure the voltages listed below and record them on
the PM Form.
GND
To
Adjust
Voltage
Tolerance
P2-2
P2-1
R39
+5V
±
0.5V
P2-2
P2-4
Not Adjustable
+12V
±
1V
P2-2
P2-5
Not Adjustable
-12V
±
1V
4.5 Measure Line Voltage Regulation
1. Measure the AC line voltage at the wall receptacle.
NOTE: In the next step the voltage measured at the wall receptacle will drop immediately after the
exposure is terminated. Read the meter at this time.
2. Measure the line voltage at the wall receptacle again while making a radiographic exposure (80
mAs @ 110 kVp).
3. Calculate the percentage line voltage regulation using the following formula and record the
results on the Installation Report/Checklist.
100 X
Vn - V1
V1
4. If the results above do not fall within the range of 0 to 8 percent, the hospital should be informed
that an in-house wiring problem exists. (This problem results in a violation of a provision of the
Federal Performance Standards 21 CFR 1020.30)
where:Vn = No load voltage
Vl = Max load voltage
Used and Refurbished C-Arms are Available from www.SharpMedical.com - Call us at 800-969-9800
An Independent C-Arm Service Provider. This PDF provided for research / historical purposes only.
