Philips DVP721VR - Electrical Troubleshooting Guide; Power(Smps) Circuit

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ELECTRICAL TROUBLESHOOTING GUIDE
1. Power(SMPS) CIRCUIT
NO 5.3VA.
Replace the F101.
(Use the same Fuse)
Is the F101 normal?
Is the R101
normal?
Is the BD101
normal?
NO
NO
NO
NO
NO
NO
Replace the
BD101.
Replace the R101.
Is the D102
normal?
Check or Replace
the D102.
Replace the D118.
Replace the IC103.
NO
NO
NO
Replace the D111
Replace the D110
Replace the D106
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
Is Vcc (9V - 18V)
supplied to IC101 Pin2?
NO
Is the D118 normal?
Is there about 2.5V
at the IC103 Vref?
Is the D111 normal?
Is the D110
normal?
Is the D106
normal?
Replace the D113.
Is the D113
normal?
Is the D107
normal?
Power Line of Main
PCB is short
Is the D108
normal?
NO
NO
NO
Replace the D108.
Replace the D107.
YES
YES
YES
YES
NO 5.0V.
Check or Replace
the D118
Is the Vcc(5.3V) sup-
plied to Q150 Emittor?
Check or Replace
the Q150.
Is the Q162 Base
“H”?
NO
NO
Check the PWR CTL“H”
signal from µ-com
YES
YES
YES