Safety Test Requirements
All units that are returned for service or repair must
pass the original manufactures safety tests. Safety
testing requires both Hipot and Ground Continuity
testing.
HI-POT TEST INSTRUCTION
1.Application requirements
1.1 All mains operated products must pass the Hi-Pot
test as described in this instruction.
1.2 This test must be performed again after the
covers have been refitted following the repair ,
inspection or modification of the product.
2. Test method
2.1 Connecting conditions
2.1.1 The test specified must be applied between the
parallel blade plug of the main scord and all
accessible metal parts of the product.
2.1.2 Before carrying out the test, reliable conductive
connections must be ensured and thereafter be
maintained throughout the test period.
2.1.3 The mains switch(es) must be in the "ON"
position.
2.2 Test Requirements
All products should be HiPot and Ground Continuity
tested as follows:
Condition
Hi-Pot Test for
products where
the mains input
is 220V AC
Hi-Pot Test for
products where
the mains input
is 110V AC
Ground
Continuity
Test
requirement
Test
voltage
2820VDC
(2000VAC)
1700VDC
(1200VAC)
Test time 3 seconds
1 seconds
Trip
current
(Tester)
Set at 100uA for
Max limit;
Set at 0.1uA for
Min limit.
5mA
Ramp
time
(Tester)
Set at 2 seconds
刈
Test current:
25A, AC
Test time: 3
seconds
Resistance
required:
<=0.09+Rohm,
R is the
resistance of
the mains
cord.
91 220CW9
LCD
2.2.1 The minimum test duration for Quality Control
Inspector must be 1 minute.
2.2.2 The test voltage must be maintained within the
specified v 5%.
2.2.3 There must be no breakdown during the test.
2.2.4 The grounding blade or pin of mains plug must
be conducted with accessible metal parts.
3. Equipments and Connection
3.1. Equipments
For example :
- Zentech 9032 PROGRAMMABLE AUT O SAFETY
TESTER
3.2. Connection
* Turn on the power switch of monitor before Hipot
and Ground Continuity testing.
4. Recording
Hipot and Ground Continuity testing records have to
be kept for a period of 10 years.
76
228C3LH LCD
Summary of Contents for 228C3LHSB/00
Page 7: ...228C3LH LCD 7 Troubleshootingʳ ...
Page 8: ...8 228C3LH LCD Troubleshooting ...
Page 17: ...228C3LH LCD 17 FAQs Frequently Asked Questions ...
Page 18: ...18 228C3LH LCD FAQs Frequently Asked Questions ...
Page 21: ...228C3LH LCD 21 Service tool Hardware PCM code 12NC 5E L8215 001 996510019769 ...
Page 26: ...26 228C3LH LCD DDC Instructions Step 2 Press Open File then choose 228C3LH DDC FILE Fig 5 ...
Page 33: ...228C3LH LCD 33 Firmware Upgrade for CPU Step 4 Press Auto to upgrade FW Step 5 Upgrade OK ...
Page 35: ...228C3LH LCD 35 LULQJ LDJUDP ...
Page 36: ...36 228C3LH LCD ORFN LDJUDP ...
Page 43: ...228C3LH LCD 43 S calar Diagram C B A ...
Page 45: ...LED Driver Diagram C B A 228C3LH LCD 45 ...
Page 46: ...LED Driver Diagram C B A 46 228C3LH LCD ...
Page 48: ...Control Diagram C B A 48 228C3LH LCD ...
Page 50: ...LED Diagram C B A 50 228C3LH LCD ...