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No.SymptomsDiagnosis ContentsPossible Defective Points
Does the voltage of CN103-pin 3 and pin 5 on the DVDM Assy change
normally ?LOAB Assy
Pin 3 (SW2(TRIN)): Tray is fully closed: "L"Tray SW (S101)
A
Pin 5 (SW1(TROUT)): Tray is fully opened: "L"
DVDM Assy
Is a LOAD-DRV signal reaching ?
DVD IC (IC201)
A tray cannot be opened.
Are the signals output from IC101-pin 36 and pin 37 (CN103-pin 1 and
4(An opening screen is
pin 2) on the DVDM Assy ?DVDM Assy
displayed on the monitor)Pin 36: Approx. 6V during opening tray approx. 0V during closing tray.FTS Driver IC (IC101)
Pin 37: Approx. 0V during opening tray approx. 6V during closing tray.
Are wires of CN104 and CN103 on the DVDM Assy disconnected or
Connector / cable
damaged ?
Does the voltage of CN102-pin 12 change by pressing the Inside
Inside switch
switch.
Are the signals output from IC101-pin 34 (FOCS_DRV) and pin 35 DVDM Assy
(FOCS_RTN) on the DVDM Assy ?FTS Driver IC (IC101)B
Does 650-nm LD emit light ?
Does a pickup lens move up / down ?Pickup
Does an actuator spring bend ?
Playback impossibleAre plastic parts damaged ? Or is a shaft detached ?
5Mechanism section (motor)
(no focusing)Is the turntable detached or tilted ?
Is flexible cable of CN101 on the DVDM Assy disconnected or
Flexible cable / connector
damaged ?
Is signal output from IC201-pin 42 (FOSO) on the DVDM Assy ?
DVDM Assy
(Device control of about 1.4 V is output usually. It is fluctuated by about
DVD IC (IC201)
? 250 mV with focus up / down.)
Are the signals output from IC101-pin 12 (W), pin 13 (V) and pin 14 (U)
DVDM Assy
on the DVDM Assy ?
FTS Driver IC (IC101)C
Is pin 41 (STBY) fixed LOW and is pin 38 (ENDM) fixed LOW ?
Playback impossibleIs there any part detached from the spindle motor ?Mechanism section
6
(Spindle does not turn)Or Is there any foreign object lodged in it ?(Spindle motor)
Are wires of CN102 on the DVDM Assy disconnected or damaged ?Flexible cable / connector
DVDM Assy
Is signal output from IC201-pin 37 (DMSO) on the DVDM Assy ?
DVD IC (IC201)
Does 650-nm LD deteriorate ?650-nm LD deteriorated.
If the voltage at each both ends of R22 and R25 on the DVDM Assy is (When playback of a DVD is
0.4 V or more, the 650-nm LD is definitely deteriorated. impossible)
Does 780-nm LD deteriorate ?780-nm LD deteriorated.
Playback impossible
7If the voltage at each both ends of R21 and R26 on the DVDM Assy is (When playback of a CD is
(Playback stops)
0.4 V or more, the 780-nm LD is definitely deteriorated. impossible)
D
DVDM Assy
Is there abnormality in FG waveform ?
FG output : FTS Driver IC (IC101)
Are there scratches or dirt on the disc ?Disc
Picture disturbance during
Are there scratches or dirt on the disc ?
8playbackDisc
Is there a problem with the format of the disc ?
(block noise, freeze, other)
DVDM Assy
Check the waveform (ABCK, ALRCK, ACLK, ASDATA).
DVD IC (IC201)
No sound
9Is signal output from audio DAC IC on the DVDM Assy ?DVDM Assy
(Picture is normal)
Main CH : IC501-pin 7, pin 8Audio Dac IC (IC501)
Multi CH : IC601-pin 7, pin 8, IC701-pin 7, pin 8Audio Dac IC (IC601, IC701)
E
F
71
DV-575A-S
5678 |
ACEC
