GE Transport Pro, Service Manual

Page: 89 / 110

Revision A Transport Pro 9-7
2012659-042
Checkout: Electrical Safety Tests
1. Configure the leakage tester like the circuit shown below with GND
switch OPEN and polarity switch NORM.
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
Power Cord
Leakage Tester
NORM
RVS
HIGH
LOW
GND
1K
0.15µF
10
Power Cord
Device
Under
Test
DMM set to measure AC voltage
GND
DMM
Closed
Open
Probe to exposed conductive chassis
004A