User Manual

39
HI-POT TEST
SoundTouch™ 30 WiFi Music
System HI-POT test
1. Hi-Pot Test
THIS IS A MANDATORY TEST
CAUTION - All units that are disassembled
as part of a repair MUST be Hi-Pot tested
before being returned to the customer.
This test applies a high voltage to the AC line
cord and measures the current leakage to
the chassis and/or other metal parts on the
outside of the unit to check for potential
shock hazards.
If the unit fails Hi-Pot test, it must be
rerturned to the technician for troubleshoot-
ing and repair of the problem, after which it
must be Hi-Pot tested again to ensure that it
now passes the test.
Hi-Pot Tester Settings:
Type of product: 120 VAC 2-wire Class II
Test Voltage: 1500 VAC
Trip Current Limits: 2mA min, 6mA max
Ramp: 1 sec
Dwell: 2 sec
Type of product: 220 VAC 2-wire Class II
Test Voltage: 2500 VAC
Trip Current Limits: 2mA min, 6mA max
Ramp: 1 sec
Dwell: 2 sec
2. Hi-Pot Test Procedure
2.1 Connect the positive side (hot) of the Hi-
Pot tester to both terminals of the AC mains
input.
2.2 Connect the return of the Hi-Pot tester to
all connections on the 3.5mm audio jack,
ground shell on either USB connector and all
points on the Ethernet connector.
2.3 Connect the continuity check terminal of
the Hi-Pot tester to the shell of the USB.
(all grounds are connected to the same point
internal to the product, so only a single
connection point is required).
This test must be performed only after the
system has been completely assembled.
Failure of this test indicates a faulty trans-
former, defective or incorrectly dressed
primary wiring, improperly attached leads,
surface contamination of either the power
supply board or the I/O connector board, or
incorrectly adjusted trip point on tester.