XV-DV353
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No.
Symptoms
Diagnosis Contents
Possible Defective Points
4
A tray cannot be opened.
(An opening screen is
displayed on the monitor)
Does the voltage of CN104-pin 3 and pin 5 on the DVDMAIN Assy
change normally ?
Pin 3 (SW2(TRIN)): Tray is fully closed: "L"
Pin 5 (SW1(TROUT)): Tray is fully opened: "L"
LOAB Assy
Tray SW (S101)
Is the signal input into IC101-pin 11 (TROPEN) on the DVDMAIN
Assy? At open: 3.3V, At close: 0V
DVDMAIN Assy
DVD IC (IC201)
Are the signals output from IC101-pin 1 and pin 2 (CN103-pin 1 and
pin 2) on the DVDMAIN Assy ?
Pin 2: Approx. 6V during opening tray approx. 0V during closing tray.
Pin 1: Approx. 0V during opening tray approx. 6V during closing tray.
DVDMAIN Assy
FTS Driver IC (IC101)
Are wires of CN104 and CN103 on the DVDMAIN Assy disconnected
or damaged ?
Connector / cable
Does the voltage of CN102-pin 1 on the DVDMAIN Assy change to 0V
by pressing the Inside switch.
Inside switch
5
Playback impossible
(no focusing)
Are the signals output from IC101-pin 3 (FOCS_DRV) and pin 4
(FOCS_RTN) on the DVDMAIN Assy ?
DVDMAIN Assy
FTS Driver IC (IC101)
Does 650-nm LD emit light ?
Does a pickup lens move up / down ?
Does an actuator spring bend ?
Pickup
Are plastic parts damaged ? Or is a shaft detached ?
Is the turntable detached or tilted ?
Mechanism section (motor)
Is flexible cable of CN101 on the DVDMAIN Assy disconnected or
damaged ?
Flexible cable / connector
Is signal output from IC201-pin 42 (FOSO) on the DVDMAIN Assy ?
(Device control of about 1.4 V is output usually. It is fluctuated by about
±
250 mV with focus up / down.)
DVDMAIN Assy
DVD IC (IC201)
6
Playback impossible
(Spindle does not turn)
Are the signals output from IC101-pin 30 (W), pin 33 (V) and pin 35 (U)
on the DVDMAIN Assy ?
Is pin 26 (STBY) fixed LOW ? (pin 26 is High at playback: 3V)
DVDMAIN Assy
FTS Driver IC (IC101)
Is there any part detached from the spindle motor ?
Or Is there any foreign object lodged in it ?
Mechanism section
(Spindle motor)
Are wires of CN102 on the DVDMAIN Assy disconnected or damaged
?
Flexible cable / connector
Is signal output from IC201-pin 37 (DMSO) on the DVDMAIN Assy ?
DVDMAIN Assy
DVD IC (IC201)
7
Playback impossible
(Playback stops)
Does 650-nm LD deteriorate ?
If the voltage at each both ends of R322 and R325 on the DVD MAIN
Assy is 0.4 V or more, the 650-nm LD is definitely deteriorated.
650-nm LD deteriorated.
(When playback of a DVD is
impossible)
Does 780-nm LD deteriorate ?
If the voltage at each both ends of R321 and R326 on the DVD MAIN
Assy is 0.4 V or more, the 780-nm LD is definitely deteriorated.
780-nm LD deteriorated.
(When playback of a CD is
impossible)
Is there abnormality in FG waveform ? (IC201-pin 50)
DVDMAIN Assy
FG output : FTS Driver IC (IC101)
Are there scratches or dirt on the disc ?
Disc
Picture disturbance during
playback
(block noise, freeze, other)
Are there scratches or dirt on the disc ?
Is there a problem with the format of the disc ?
Check the video signals.
Composite video signal (IC401-pin 25)
S video signal (IC401-pin 21, pin 26)
RGB video signal (IC401-pin 16, pin 18, pin 20)
Disc
Check the waveform (ALCK : IC201-pin 212), (ALRCK : IC201-pin
209), (ABCK : IC201-pin 210), (ASDATA0 : IC201-pin 197).
DVDMAIN Assy
DVD IC (IC201)
DVDMAIN Assy
DVD IC (IC201)
Video IC (IC401, IC451)
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