Philips Dell W2300 Service Manual page 38

38
W2300
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5.No DVI picture
Check if DVI
signals input to
TMDS-Rx 7842
Yes
Check if DDC IC
7801 with correct
DVI EDID code
Yes
Check if TMDS-
Rx 7842 output 24
bits signals to
JAGASM
Yes
Go to 3. No picture / LED is green
6.No TV picture
Check if tuner
1501 pin 1 output
MM-CVBS signal
Yes
Check if connector
1601 pin 17 output
TUN-CVBS
signal
Yes
Connector 1
Check if 7301
pin 2=3.3V
Yes
Check if 1302
output 24MHz
Repair Flow Chart
No
Check input path from 1801
to 7842
No
Put correct DVI EDID code
in 7801
No
Replace 7842
No
Replace 1501
No
Replace 7501
No
Replace 7301
No
Replace 1302
Yes
Check if video
decoder 7302
output 8 bits
digital signals
Yes
Check resistors-
network 3325,
3324
Yes
Connector 2
Check if
VDD-IO-3V3
VDD-CORE-1V8
PLL-1V8
DAC-1V8
DAC-3V3
To FLI2300 7351
Yes
Check if 1351
output 13.5MHz
Yes
Check if video
converter 7351
output 24 bits
YCbCr signals
Yes
Check resistors-
network
3372~3377
Yes
Go to 3. No picture / LED is green
No
Replace 7302
No
Replace 3325 or 3324
Check circuit around each
regulator and eliminate short
No
and open situation
7006 pin3=1V8
7009 pin2=3V3
No
Replace 1351
No
Replace 7351
No
Replace 3372~3377