Dell E153FPc Service Manual page 38

U102-date Output
Measured DCLK (pin 57 from U102)
DVS, DHS (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 (PIN5-14, 106-113,17-26)
Is the waveform ok?
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OK
OK
OK
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NG
Replace ZAN3XL (U102) or
replace Main board.
If Main Board being replaced, please
NG
do the DDC – content reprogrammed
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Dell E153FPc