Sony DVP-NC625 Service Manual page 103

6-11-4. The product itself is defective.
• If MB108 does not have any problem,
The board other than MB-108 board is defective or connec-
tion is defective or optical pickup block is defective or mecha-
nism deck is defective
1. Power LED does not light in Red when the AC power
is turned on.
Check the EVER –13V (pin-3), EVER+3.3V (pin-qa),
EVER+11V (pin-qd) voltage of the power supply block
CN201.
If voltage is abnormal. t The power supply block is defec-
tive.
2. Power LED does not light in green after transmitting
the POWER on command. It remains lighting in red
(in the STANDBY mode).
2-1. Check the EVER -13V (pin-3
EVER+11V (pin-qd qd) voltage at CN201 of the power
qd qd qd
supply block/
If voltage is abnormal. t The power supply block is defec-
tive.
2-2. Check if the fuse on the IF board has blown of not.
If the fuse has blown t Replace the fuse.
2-3. Check the P-CONT (pin-2
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 IF-99 board is defective, or connector
installation is defective, or the power supply block is defec-
tive.
2-4. 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 IF-99 board is defective.
2-5. Check PONCHK (pin-e;
IF-99 board.
If it is 0.5 V or more. t The power supply is defective, or IF-
91 board is defective.
3. Power LED becomes red (STANDBY mode) in at once
through Power LED lights in Green once when the
POWER button is pressed.
3-1. Check CN201 voltage of the power supply block
when the LED lights in green.
If voltage is abnormal. t The power supply block is defec-
tive, or the IF-99 board is defective, or MB108 is defective
3-2. Check XFRRST (pin-8
board.
If it is fixed to "L". t The signal line has defective solder-
ing, or is short-circuited with other signal lines, or parts are
defective.
3 3 ), EVER+3.3V (pin-qa
3 3
2 2 ) at CN401 of the IF-99
2 2
e;) of IFCON (IC404) on the
e; e;
e;
8 8 ) at CN101 on the MB-108
8 8
3-3. Check IFBSY (pin-5
SO0 (pin-1 1 1 ) and SC0 (pin-3
1 1
If they are fixed to "H" or "L".
t The signal line has defective soldering, or is short-cir-
cuited 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 IF-99 board is de-
fective, 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.
3-4. Check PONCHK (pin-e;
IF-99 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 IF board is defec-
qa qa
qa qa),
tive.
4. The LED lights in green but the FL display does not
light when the POWER button is pressed.
Connection between the power supply block and the IF-99
board is defective, or connector installation is defective, or
the IF-99 board is defective.
5. Both picture and audio are not output.
Connection between the power supply block and the IF-99
board is defective, or connection between the IF-99 board and
the AV-72 board is defective, or connection between the
AV-72 board and the MB-108 board is defective, or connec-
tor installation is defective, or AV-72 board is defective.
6. Picture is not normal. (Block noise or others appear.)
The MB-108 board AVD (IC403) or SDRAM (IC404, IC405)
is defective, or ARP & SERVO (IC301) is defective.
6-21
5 5 ), XIFCS (pin-6 6 6 ), SI0 (pin-4
5 5 6 6
3 3 ) at CN101
3 3
e;) of IFCON (IC404) on the
e; e;
e;
4 4 ),
4 4