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7.1.7 TROUBLE SHOOTING
No.SymptomsDiagnosis ContentsPossible Defective Points
Check the voltage of EV4.0V, �28V, FLDC + and FLDC - on the
POWER SUPPLY Unit
POWER SUPPLY Unit.
A
Are wires of output connector (POWER SUPPLY Unit) and CN301
Connector / cable
(DVDM Assy) disconnected or damaged ?
FLKY Assy
Check that the voltage at IC101-pin 22 (KEY0) on the FLKY Assy Tact SW
becomes 0 V when the POWER key is pressed and 3.3 V when it is (when operation of only the
released.POWER key on the main unit is
1The power is not turned on.
not accepted)
Check that the following voltage is output :DVDM Assy
IC341-pin 5 : 3.3V on the DVDM Assy3.3V Regulator IC (IC341)
FLKY Assy
Check that the voltage at IC101-pin 17 (SEL IR) on the FLKY Assy is in Remote receiver section
Bthe range between 0 and 3.3 V while receiving signals from the remote (when operation of only the
control unit when any key on it is pressed.POWER key on the remote
control unit is not accepted)
Is the level at both IC101-pin 12 (RESETOUT) and pin 11 (POWER FLKY Assy
ON) on the FLKY Assy "H" ?FL Control IC (IC101)
Y Check the voltage of E+6.8V and SW3.3V on the POWER SUPPLY
Unit.
POWER SUPPLY Unit
Y Check the voltage of Pcont is about 3V on the POWER SUPPLY
Unit.
Check that the following voltage are output :DVDM Assy
IC311-pin 5 : 5V on the DVDM Assy.5V Regulator IC (IC311)
C
DVDM Assy
Is a resonator (X201 : 27MHz) on the DVDM Assy oscillating ?
Crystal resonator (X201)
Y Is a signal input into IC203-pin26 (PCE#) on the DVDM Assy ?
(Is a signal "H" for 80 mS and then "L" after the power is turned
on ?)DVDM Assy
? Communication with flash ROM.DVD IC (IC201)
Y Are the signals input into IC202-pin 16 (DWE#), pin 19 (DCS#) Flash ROM (IC203)
An opening screen is not
and pin 38 (SDCLK) on the DVDM Assy ?SDRAM (IC202)
displayed on the monitor
2(Is a signal fluctuating ?)
(The FL display lights. The
? Communication with SDRAM
mechanism does not work.)
Is a signal output from IC203-pin 28 (PRD#) on the DVDM Assy?
DVDM Assy
(Is a signal fluctuating for several hundred mS after the power is turned
DFlash ROM (IC203)
on ?)
DVDM Assy
Is a signal input into IC101-pin 16 (ACK) on the FLKY Assy ?
DVD IC (IC201)
(Is a signal fluctuating ?)
FLKY Assy
? Communication with FL Control IC
FL Control IC (IC101)
Is a signal output from IC101-pin 10 (XREADY) on the FLKY Assy ?FLKY Assy
(Is a signal fluctuating in the range of 0-3V ?)FL Control IC (IC101)
DVDM Assy
Are the signals output from IC101-pin 9, pin 8 and pin 7 on the FLKY DVD IC (IC201) �
Assy ?FLKY Assy
(in the range of 0-3V)FL Control IC (IC101)
communication line
E
Are the signals of IC204-pin 5(SDA) and pin 6(SCL) on the DVDM Assy DVDM Assy
fluctuating for one or two seconds after the power is turned ?EEPROM (IC204)
An opening screen is not
DVDM Assy
displayed on the monitorCheck the video signal path between DVD IC (DVDM Assy IC201) and
3Video circuit after DVD IC
(The FL display lights. The video-out terminal (see the block diagram)
(IC201)
mechanism does not work.)
F
70DV-575A-S
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