Toshiba 15SLDT3R Service Manual page 82

Video problem
RF
Check tuner CVBS
signal to scaler, I2C,
power and related
circuit.
1. CheckU701#4 for the 5V
2. Check U701#7,8 for I2C check
1. Check C604#1 and C605#2, C6102#1
for Y-signal waveform
82
Video problem
Is OSD on the
screen
Check if signal cable
is connected and
have signal output
Which input has no
picture?
AV/SV
Check signal Check signal path
path from from connector to the
connector to the scaler
scaler
1. Check C636#1 for VGA_R
2. Check C637#1 for VGA_G
3. Check C639#1 for VGA_B
4. Check R657#1 for HSYNC
5. Check R663#1 for VSYNC
No
Check panel power on LVDS
cable:
Yes
Check backlight on/off control:
VGA
Check signal path
from connector to the
scaler, especially the
Y signal
1. Check C606#1 for Y
2. Check C607#1 for Pr
3. Check C6084#1 for Pb
U202 pin 5,6,7,8 should have
5 Vdc(15"/19"/22"),12V(26")
CN201 pin2 should be 2~5Vdc
Component