23
3. Troubleshooting guide
1. Without backlight
In STANDBY, does
LED red light
Check the pin1 and pin3 of
CN3 has +5V output
Check the
FUSE
Replace supply
power board
Check the LED
Replace CPU board
Does LED flicker
Replace CPU
board
Check the
backlight socket is
normal?
Problem LCD screen
Check if the X508
(pin1-2) of the power
board has 18V,
pin10-12 has 120V.
Is 5v for pin10 of
X20 ?
Check if between R172
and R173 connect wire
has 3.3V, if R178 short
to the guand?
Replace CPU board
Check the pin B and pin
C of V10 and V12 is
normal?
Yes
No
No
Yes
Yes
No
Yes
Yes
No
No
No
Yes
Green
Yes
No change color
Содержание LC-37R25
Страница 1: ...LCD TELEVISION LC 37R25 America ...
Страница 12: ...10 Fig 1 1 Simplified functional block diagram of the MSP 34x0G ...
Страница 14: ...12 INTERNAL BLOCK DIAGRAM ...
Страница 20: ...18 8 CXA2089Q ...
Страница 21: ...CPU board Power supply board Analog board Filter board Wiring diagram 19 to speaker ...
Страница 28: ...Graphic Component IN of CPU board 203 L37R70 01DL Page 1 of 7 ...
Страница 29: ...Video decoders of CPU board 203 L37R70 01DL Page 2 of 7 ...
Страница 30: ...CPU board 203 L37R70 01DL Page 3 of 7 ...
Страница 31: ...Frame memory of CPU board 203 L37R70 01DL Page 4 of 7 ...
Страница 32: ...GM1601 of CPU board 203 L37R70 01DL Page 5 of 7 ...
Страница 33: ...Memory I F of CPU board 203 L37R70 01DL Page 6 of 7 ...
Страница 34: ...Power of CPU board 203 L37R70 01DL Page 7 of 7 ...
Страница 35: ...Power supply board 782 LYT25 2000 ...
Страница 36: ...Filter board 782 L37R7 5100 ...
Страница 37: ...Analog board 782 L37R7 5300 Page 1 of 2 ...
Страница 38: ...Analog board 782 L37R7 5300 Page 2 of 2 ...
Страница 81: ...603 L37R250 10 11 Ver 1 0 ...