LG Flatron L1930SQ Service Manual page 19

(OSD IS NOT DISPLAYED)
3
MORE THAN 3V?
CONTACTING SCOPE
PROBE TO CAUTION LABEL.
(CONTACT PROBE TO
CAUTION LABEL.
CAN YOU SEE PULSE
REPLACE CCFL LAMP
IN THE LCD MODULE
Waveforms
3 J705-#9
2. NO RASTER (OSD IS NOT DISPLAYED) – LIPS
NO RASTER
J705
PIN5, PIN6
5V?
YES
J705 PIN9
YES
J705 PIN10
5V?
YES
CHECK
PULSE AS
AT YOUR
SCOPE?
YES
3 J705-#9
NO
NO
NO
NO
- 17 -
CHECK LIPS
CHECK MICOM INV ON/OFF
PORT.
1. CONFIRM BRIGHTNESS
OSD CONTRL STATE.
2. CHECK MICOM DIM-ADJ
PORT
LIPS