SONY DVPCX777ES
Manual de Servicio

DVP-CX777ES

4-11-4. The product itself is defective. � If MB does not have any problem, The board other than MB board is defective or connection is defective or optical pickup block is defective or mechanism deck is defective 1. FL display does not light when the POWER button is pressed. 1-1. Check the EVER -11V (pin-2), EVER +5V (pin-qd), EVER +3.3V (pin-qa), SW +5V (pin-qs) voltage at CN201 of the power supply block If voltage is abnormal. t The power supply block is defective. 1-2. Check if the fuse on the power block has blown of not. If the fuse has blown t Replace the fuse. 1-3. Check the P-CONT (pin-1) at CN205 of the AV board when the POWER button is pressed. If it remains at �L�, t The signal line has the defective soldering or it is shortcircuited with other signal lines or capacitor or resistor is defective or IFCON is defective or connection between the power supply block and the AV board is defective, or connector installation is defective, or the power supply block is defective. 1-4. Check if the button is kept depressed in the IFCON self mode. If the button is kept depressed. t The front panel is defective, or PANEL-L board is defective. 1-5. Check PON_CHECK (pin-og) of IFCON (IC1003) on the PANEL-L board. If it is 0.5 V or more. t The power supply is defective, or PANEL-L board is defective. 1-6. Check FL1001 (pin-1 & pin-rj) on the PANEL-L board. If no voltage supply t DC/DC converter (T1081) defective, or the PANEL-L board is defective. 2. FL display light once and becomes not light when POWER button is pressed. 2-1. Check CN201 voltage of the power supply block when the FL display light on. If voltage is abnormal. t The power supply block is defective, or the PANEL-L board is defective, or MB board is defective. 2-2. Check XFRRST (pin-2) at CN102 on the MB board. If it is fixed to �L�. t The signal line has defective soldering, or is short-circuited with other signal lines, or parts are defective.

2-3. Check XIFBUSY (pin-3), XIFCS (pin-4), SI0 (pin5), SO0 (pin-6) and SC0 (pin-7) at CN102 If they are fixed to �H� or �L�. t The signal line has defective soldering, or is short-circuited with other signal line, or parts are defective, or SYSCON (IC104) is defective If they change between �L/H�. Connector installation is defective, or the PANEL-L board is defective, or SYSCON (IC104) is defective. If they stay in the center voltage. Poor connection of flexible wiring board such as it is inserted in an angle diagonally, or defective soldering, or is short-circuited with other signal line. 2-4. Check PON_CHECK (pin-og) of IFCON (IC1003) on the PANEL-L board. If rise-up time from 0.5 V to 1.5 V or more takes longer time, or it does not exceed 1.5 V or more. t The PANEL-L board is defective. 3. Both picture and audio are not output. Connection between the power supply block and the AV board is defective, or connection between the AV board and the MB board is defective, or connector installation is defective, or AV board is defective. 4. Picture is not normal. (Block noise or others appear.) The MB board AVD (IC403) or SDRAM (IC404, IC405) is defective, or ARP & SERVO (IC301) is defective.

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