Sony DVP-CX777ES Service Manual page 44

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 defec-
tive.
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 short-
circuited with other signal lines or capacitor or resistor is de-
fective or IFCON is defective or connection between the power
supply block and the AV board is defective, or connector in-
stallation 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 defec-
tive, 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 defec-
tive, or the PANEL-L board is defective, or MB board is de-
fective.
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 defec-
tive.
44
2-3. Check XIFBUSY (pin-3), XIFCS (pin-4), SI0 (pin-
5), 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-cir-
cuited 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.