5678
No.SymptomsDiagnosis ContentsPossible Defective Points
4A tray cannot be opened.Does the voltage of CP2302-pin 3 and pin 1 on the DVD MT Assy
Tray SW
(An opening screen is change normally ?
displayed on the monitor)Pin 5 (SW2(TRIN)): Tray is fully closed: "L"
Pin 3 (SW1(TROUT)): Tray is fully opened: "L"A
DVD MT PCB Assy
Is a LOAD-DRV signal reaching ?
DVD IC (IC4002)
Are the signals output from IC101-pin 36 and pin 37 (CN103-pin 1 and
pin 2) on the DVDM Assy ?DVD MT PCB Assy
Pin 4: Approx. 45V during opening tray approx. 0V during closing tray.FTS Driver IC (IC2301)
Pin 5: Approx. 0V during opening tray approx. 4.5V during closing tray.
Are wires of CP2302 and CP2303 on the DVDM Assy disconnected or
Connector / cable
damaged ?
Does the voltage of CD2301-pin 5 change by pressing the Inside
Inside switch
switch.
5Playback impossibleAre the signals output from IC2301-pin 9 (F+) and pin 8 (F�) on the DVD MT PCB Assy
(no focusing)DVDM Assy ?FTS Driver IC (IC2301)B
Does 650-nm LD emit light ?
Does a pickup lens move up / down ?Pickup
Does an actuator spring bend ?
Are plastic parts damaged ? Or is a shaft detached ?
Mechanism section (motor)
Is the turntable detached or tilted ?
Is flexible cable of CP2301 on the DVD MT Assy disconnected or
Flexible cable / connector
damaged ?
Is signal output from IC4002-pin 42 (FOSO) on the DVDM Assy ?
DVD MT PCB Assy
(Device control of about 1.4 V is output usually. It is fluctuated by about
DVD IC (IC4002)
? 250 mV with focus up / down.)
6Playback impossibleAre the signals output from IC2301-pin 10 (MOT SPDL�), and pin 11
DVD MT PCB Assy
(Spindle does not turn)(MOT SPDL+) on the DVD MT Assy ?
FTS Driver IC (IC2301)C
Is pin 33,34 (STBY) fixed LOW?
Is there any part detached from the spindle motor ?Mechanism section
Or Is there any foreign object lodged in it ?(Spindle motor)
Are wires of CP2303 on the DVD MT Assy disconnected or damaged ? Flexible cable / connector
DVD MT PCB Assy
Is signal output from IC4002-pin 37 (DMSO) on the DVDM Assy ?
DVD IC (IC4002)
7Playback impossibleDoes 650-nm LD deteriorate ?650-nm LD deteriorated.
(Playback stops)If the voltage at each both ends of R2303 and R2305 on the DVD MT (When playback of a DVD is
Assy is 0.4 V or more, the 650-nm LD is definitely deteriorated. impossible)
Does 780-nm LD deteriorate ?780-nm LD deteriorated.
If the voltage at each both ends of R2302 and R2304 on the DVD MT (When playback of a CD is
Assy is 0.4 V or more, the 780-nm LD is definitely deteriorated. impossible)
D
Are there scratches or dirt on the disc ?Disc
8Picture disturbance during
Are there scratches or dirt on the disc ?
playbackDisc
Is there a problem with the format of the disc ?
(block noise, freeze, other)
9No soundDVD MT PCB Assy
Check the waveform (ABCK, ALRCK, ACLK, ASDATA).
(Picture is normal)DVD IC (IC4002)
Is signal output from IC8004-pin 7 and pin 8 on the DVD MT Assy ?DVD MT PCB Assy
Audio Dac IC (IC8004)
E
F
61
DV-380-S
5678 |
ACEC
PIONEER
