21
TROUBLESHOOTING HINTS
7. No video
No video
OK
Check the LCD panel or
41 pin cable
White
Trouble connection.
NO
YES
OUT1 41 pin cable
connection check.
NO
Trouble connection.
NO
YES
U8 #2 pin
output 12V check?
YES
YES
LVCC 3.3V check
No raster
NO
YES
Is OSD normal?
Change the contrast
control value to maximum
NO
YES
Are the contrast
controls maximum?
NO
YES
YES
Are the output
signal of the MX88281?
Change the main B'D
(Trouble in the TDA8752)
Change the main B'D
(Trouble in the TDA8752)
NO
YES
Are the video
signal and output signal
of the TDA8752?
Black
Summary of Contents for L500B
Page 1: ...ServiceManual TFT LCD MONITOR Model L500B DAEWOO ELECTRONICS CO LTD OVERSEAS SERVICE DEPT...
Page 24: ...25 SCHEMATIC DIAGRAM u MAIN88281A...
Page 25: ...26 SCHEMATIC DIAGRAM u TOP CIRCUIT...
Page 26: ...27 SCHEMATIC DIAGRAM u BUFFER...
Page 27: ...28 SCHEMATIC DIAGRAM u POWER DC DC...
Page 28: ...29 SCHEMATIC DIAGRAM u MEMORY...
Page 29: ...30 SCHEMATIC DIAGRAM u MICOM...
Page 30: ...31 SCHEMATIC DIAGRAM u RGB SYNC...
Page 31: ...32 SCHEMATIC DIAGRAM u TDA8752A...
