Garmin G1000 System Maintenance Manual page 129

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Top metal case of PFD 1: __________ milli-volts
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Top metal case of PFD 2: __________ milli-volts
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Top metal case of MFD: __________ milli-volts
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Top metal case of GMA 1347D #1: __________ milli-volts
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Top metal case of GMA 1347D #2: __________ milli-volts
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Top metal case of GCU 477: __________ milli-volts
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Top metal case of GMC 710: __________ milli-volts
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GEA 71 #1 body: __________ milli-volts
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GEA 71 #2 body: __________ milli-volts
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GDC 7400 #1 body: __________ milli-volts
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GDC 7400 #2 body: __________ milli-volts
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OAT 1 Probe base nut (inside fuselage): __________ milli-volts
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OAT 2 Probe base nut (inside fuselage): __________ milli-volts
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GDL 69A body: __________ milli-volts
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Engine Signal Conditioner #1 near mounting holes of case: __________ milli-volts
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Engine Signal Conditioner #2 near mounting holes of case: __________ milli-volts
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PFD1 Cooling fan metal base: __________ milli-volts
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PFD2 Cooling fan metal base: __________ milli-volts
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MFD Cooling fan metal base: __________ milli-volts
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GSA 80 (Roll) Servo body: __________ milli-volts
Ensure that at each PFD or MFD test point, no more than 20 milli-volts (20 mΩ) are present. Ensure that
at each other test point, no more than 2.5 milli-volts (2.5 mΩ) are present. In this case, voltage is
equivalent to resistance (Ω), given that precisely 1 amp reference current is present.
TIP: If 1 amp reference current cannot be maintained, note the difference between the attainable current
and 1 amp reference current. Do not allow the reference current to exceed 1.5 amps. Calculate the
percentage difference and apply this to the voltage reading to obtain the equivalent resistance. Example:
If the measured current is 1.2 amps, (20% high from the target 1 amp current), then the allowable voltage
measurement would be 20% high, 2.5 milli-volts would now be 3.0 milli-volts.
G1000 / GFC 700 System Maintenance Manual - 300/B300 Series King Air
190-00716-01
Pilot Compartment
Cabin Compartment
Page 4-17
Revision 4