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6-21
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
connection is defective or optical pickup block is defective
or mechanism deck is defective
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 -15.5V (pin-2), EVER+5.0V
(pin-qa), EVER+11V (pin-qd) voltage at CN201 of
the power supply block/
the power supply block/
If voltage is abnormal.
t The power supply block is
defective.
1-2. Check if the fuse on the IF board has blown of
not.
not.
If the fuse has blown
t Replace the fuse.
1-3. Check the P-CONT (pin-2) at CN401 of the AF-98
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
defective or IFCON is defective or connection between the
power supply block and the AF-98 board is defective, or
connector installation is defective, or the power supply
block is defective.
t The signal line has the defective soldering or it is short-
circuited with other signal lines or capacitor or resistor is
defective or IFCON is defective or connection between the
power supply block and the AF-98 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 AF-98 board is defective.
1-5. Check PONCHK (pin-e;) of IFCON (IC404) on the
AF-98 board.
If it is 0.5 V or more.
t The power supply is defective, or
AF-98 board is defective.
1-6. Check ND401 (pin-1 & pin-ek) on the AF-98
board.
If no voltage supply
t Voltage driver (IC407) defective, or
the AF-98 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 AF-98 board is defective, or MB108 is
defective
defective
2-2. Check XFRRST (pin-8) at CN101 on the MB-108
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.
parts are defective.
2-3. Check IFBSY (pin-5), XIFCS (pin-6), SI0 (pin-4),
SO0 (pin-1) and SC0 (pin-3) at CN101
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 AF-98 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.
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 AF-98 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 PONCHK (pin-e;) of IFCON (IC404) on the
AF-98 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.
time, or it does not exceed 1.5 V or more.
t The AF board
is defective.
3. Both picture and audio are not output.
Connection between the power supply block and the AF-98
board is defective, or connection between the AF-98 board
and the MB-108 board is defective, or connector installation
is defective, or AF-98 board is defective.
board is defective, or connection between the AF-98 board
and the MB-108 board is defective, or connector installation
is defective, or AF-98 board is defective.
4. Picture is not normal. (Block noise or others
appear.)
The MB-103 board AVD (IC403) or SDRAM (IC404,
IC405) is defective, or ARP & SERVO (IC301) is defective.
IC405) is defective, or ARP & SERVO (IC301) is defective.
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