GE Transport Pro Service Manual page 89

Revision A
Checkout: Electrical Safety Tests
1. Configure the leakage tester like the circuit shown below with GND
switch OPEN and polarity switch NORM.
Leakage Tester
HIGH
LOW
GND
0.15µF
1K
DMM
10
DMM set to measure AC voltage
2. Connect probe to the ground tabs on the Video In connector.
3. Set the power switch of the device to ON.
4. Read the current leakage indicated on DMM.
NOTE
Center-tapped and non-center-tapped supply circuits produce
different leakage currents and the UL and EN limits are
different.
5. Set the polarity switch to RVS.
6. Read the current leakage indicated on DMM.
NOTE
If either reading is greater than the appropriate specification
below or the device under test fails, contact GE Technical
Support.
• 300 µA (0.3 volts on the DMM), and the device under test is powered from
100-120 V/50-60 Hz
• 300 µA (0.3 volts on the DMM), and the device under test is powered from
a centered-tapped 200-240 V/50-60 Hz, single phase circuit
• 500 µA (0.5 volts on the DMM), and the device under test is powered from
a non-center-tapped, 200-240 V/50-60 Hz, single-phase circuit.
7. Set the GND switch on the leakage tester to CLOSED.
8. Read the current leakage indicated on DMM.
9. Set the polarity switch to RVS.
10. Read the current leakage indicated on DMM.
NOTE
If the reading is greater than the specification below, and the
device under test is powered from 100-240 V/50-60 Hz, the device
under test fails. Contact GE Technical Support.
100 µA (0.1 volts on the DMM), and the device under test is
Transport Pro
2012659-042
NORM
Power Cord
RVS
Open
Closed
GND
Probe to exposed conductive chassis
Device
Under
Test
004A
9-7