Philips BDP7500B2 Service Manual page 21

Fourthly Step:
If power supply is normal,check IC G690L which location is
U5 voltage is 3.3V or not
Yes
If IC G690L which location is U5 potentiometer always is "0",
check this circuit if short circuit or not.
Yes
Use Oscillograph check IC G690L whcih location is U5,
when turn on the power, its voltage value if change from "0"to 3.3V
at moment
Fifthly Step:
If the power still can not be turn on base on above fouth step,
please upgrade the sofeware
FLOW CHART NO.2
Pass in and out can not read dish sometime.
Check dish if put on the right position or not.
Yes
Check dish if cleanlily or not.
FLOW CHART NO.3
Can not pass in and out
Check pin connector location XP4 at decoder board is loose or not
FLOW CHART NO.4
Can not read dish
Check flat flexible cable locatio XP6 is loose or not
FLOW CHART NO.5
Line out no sound
Check optical ,coaxial if has output
Yes
Check connect wire between location J1 on audio
board and location xp8 on mpeg board is ok or not
Yes
Check audio board power is normal or not
Yes
Check IIS signal for location PCM1789 on
audio board is normal or not.
Yes
Check reposition signal for location PCM1789 on audio board
is normal or not,the check pin is #4
No
No
Check signal wire is short circuit or not
Troubleshooting
Replace this IC.
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