LG 50PG20 Troubleshooting Manual page 5

No OSD Trouble Shooting (Module Power Sequence)
Vcc
(5V)
Va
Vs
DISPEN
Symbol
Time interval between 90% of Vcc and 10% of Vs
T
On
Time interval between 10% of Vs and 90% of Vcc
T
Off
T
VaR
T
VaF
T
VsR
T
VsF
T + Time interval between 90% of Vcc and 90% of Vs
on
T
VsR
Copyright©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
TROUBLE SHOOTING GUIDE
T
On
T
VaR
T
VsR
Min
Power_on
100ms
3 Sec
Description
when Power On
when Power Off
Rising Time of Va (10% to 90%)
Falling Time of Va (90% to 10%)
Rising Time of Vs (10% to 90%)
Falling Time of Vs (90% to 10%)
when Power On
Normal Display
- 15 -
T
Off
T
VaF
T
☞1)
VsF
Power_off
3 Sec
Min.
2Frame (Recommend: 2 sec)
Min. Max.
500 -
20 -
10 300
50 300
100 800
90 500
600 2000
LGE Internal Use Only
unit
msec
msec
msec
msec
msec
msec
msec