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6-11-4. The product itself is defective.
• If MB103 does not have any problem,
The board other than MB-103 board is defective or connec-
tion is defective or optical pickup block is defective or mecha-
nism deck is defective
1. The red LED does not light 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. The LED does not light in green even once when the
POWER button is pressed. It remains lighting in red
(in the STANDBY mode).
2-1. Check the EVER -13V (pin-3), EVER+3.3V (pin-qa),
EVER+11V (pin-qd) voltage at CN201 of the power
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) at CN401 of the IF-89
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-
TE
L 13942296513
fective or IFCON is defective or connection between the power
supply block and the IF-89 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-89 board is defective.
2-5. Check PONCHK (pin-e;) of IFCON (IC404) on the IF-
89 board.
If it is 0.5 V or more. t The power supply is defective, or IF-
89 board is defective.
3. If the LED lights in green but returns to red (STANDBY
mode) in several seconds 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-89 board is defective, or MB103 is defective
3-2. Check XFRRST (pin-8) at CN101 on the MB-103
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.
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3-3. 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-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-89 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;) of IFCON (IC404) on the
IF-89 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-
tive.
4. The LED lights in green but the fluorescent display
tube does not light when the POWER button is pressed.
Connection between the power supply block and the IF-89
board is defective, or connector installation is defective, or
the IF-89 board is defective.
5. Both picture and sound are not output.
Connection between the power supply block and the IF-89
board is defective, or connection between the IF-89 board and
the AV-61 board is defective, or connection between the AV-
61 board and the MB-103 board is defective, or connector
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installation is defective, or AV-61 board is defective.
6. 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.
co
.
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