Philips Dell W2300 Service Manual page 39

7.No SVHS /
CVBS picture
Check connector 1601
Pin 20 output Y-SVHS
Pin 21 output C-SVHS
Pin 12 output AV -CVBS
signals
Yes
Go to connector 1
8.No HDTV picture
Check connector 1601
No
Pin 26 output G-Y
Pin 27 output B-Pb
Pin 25 output R-Pr
signals
Yes
Check ADC 7252
No
VDD=3V3
VD=3V3
PVD=3V3
Yes
Check if ADC 7252
No
output 24 bits RGB
digital signal and
HDTV-HSYNV,
VSYNC, CLK
Yes
Check resistors- No
network
3271~3277
Yes
Go to connector 2
Repair Flow Chart
No
Check input path from 1642
and 1641 to 1601
Check input path from 1641
to 1601
Check circuit around each
regulator and eliminate short
and open situation
Replace 7252
Replace 3271~3277
9.No PC / S-audio
/ CVI-audio sound
Check audio decoder 7901
Pin 35 input S-AUD-L
Pin 36 input S-AUD-R
Pin 38 input CVI-AUD-L
Pin 39 input CVI-AUD-R
Pin 41 input PC-AUD-L
Pin 42 input PC-AUD-R
Yes
Connector 3
Check if audio
decoder 7901
No
Pin 31=8V
Pin 10=5V
Pin 49=5V
Pin 63=5V
Yes
No
Check if 1901
output 18MHz
Yes
Check if audio decoder 7901
Pin 20 output MSP-OUT-R
Pin 21 output MSP-OUT-L
signals
Yes
Check if TDA1517 7941
Pin 1 input V(1517 in) L
Pin 2 input V(1517 in) R
signals
Yes
No
Check if 7947
Pin 7 =16V
Yes
Check if 7947 No
Pin 4 output signal
Pin 6 output signal
Yes
Replace speakers
W2300 39
Go to cover page
No
Check input path from 1641
and 1601to 7901
Eliminate short and open
situation
Replace 1901
No
Replace 7901
No
Check circuit around
7949, 7950, 7951
Eliminate short and open
situation
Replace 7947