50PN4503-ZA, 50PN450B-ZA (CHASSIS:PD31A) - LG TV Service Manual (repair manual). Page 11

Read LG 50PN4503-ZA / 50PN450B-ZA (CHASSIS:PD31A) Service Manual online

- 11 -
* 2D HD EDID data 
- 2D HD HDMI1 EDID data
- 2D HD HDMI2 EDID data
 * Vender ID
* Checksum: Changeable by total EDID data.
4.7. GND & Hi-pot test
■ GND TEST =  POWER CORD GND and SIGNAL CABLE 
GND
■ Hi-pot TEST = POWER CORD GND and LIVE&NUETRAL
■ Test Process
1.  Check the POWER CABLE and SIGNAL CABLE 
insertion condition.
2. Connect the AV JACK Tester
3. Controller(GWS103-4) on
4. GND TEST(Auto)
- If Test is failed, Buzzer operate
- If Test is passed, execute next process(HI-pot test)
- Remove A/V CORD from A/V JACK BOX
5. HI-POT test(Auto)
- If Test is failed, Buzzer operate
-  If Test is passed, GOOD Lamp on and move to next 
process automatically.
■ Checkpoint
(1) Test voltage
1) 3 Poles 
- GND: 1.5KV/min at 100mA
- SIGNAL: 3KV/min at 100mA
2) 2 Poles
- SIGNAL: 3KV/min at 100mA
(2) TEST time: 1 second
(3) TEST POINT
1) 3 Poles
- GND Test =  POWER CORD GND and SIGNAL 
CABLE GND.
- Hi-pot Test =  POWER CORD GND and LIVE & 
NEUTRAL.
2) 2 Poles
- Hi-pot Test = Accessible Metal and LIVE & NEUTRAL.
(4) LEAKAGE CURRENT: At 0.5mArms
Input
HEX
HDMI1
10
HDMI2
20
HDMI3
30
EDID C/S data
2D-HD
HDMI
check sum 
(Hex)
Block 0
0x3E
Block 1
0x24(HDMI1)
0x14(HDMI2)
Page of 36
Display

Click on the first or last page to see other 50PN4503-ZA / 50PN450B-ZA (CHASSIS:PD31A) service manuals if exist.