Dell E153FPTc Service Manual page 41

U102-date Output
Measured DCLK (pin 57 from U102)
DHS, DVS (pin 54,55 from U102)
Is the waveform ok?
DCLK around 48 MHZ, DVS=60.09Hz, DHS around 80
KHz? (Refer to input signal=640x480@60 Hz, and LED
is Green)
Check ZAN3/XL (U102)
Signal output (PIN5-12, 13-22,23-26)
Is the waveform ok?
OK
OK
OK
NG
If Main Board being replaced, please
NG
do the DDC – content reprogrammed
41
DELL E153FPTc
Replace ZAN3XL (U102) or
replace Main board.