XV-EV51
92
1
2
3
4
1
2
3
4
C
D
F
A
B
E
No.
Symptoms
Diagnosis Contents
Defectiveness Assumption
Points
4
Cannot open a tray
(An opening screen is
displayed on the monitor)
Does voltage of CN9-pin 3 and 5 on the DVDM Assy change normally ?
pin 3 (XCLOSE) : It is "H" level by the state that has finished doing CLOSE.
pin 5 (OPEN) : It is "H" level by the state that has finished doing OPEN.
Tray switch
Does LOAD_DRV signal come ?
BACK END IC (DVDM IC601)
Is a signal output from IC351-pin 14 and 15 (CN9-pin 1 and 2) on the DVDM
Assy ?
(pin 15 : It is about 6V during tray opening, It is about 0V during tray closing)
(pin 14 : It is about 0V during tray opening, It is about 6V during tray closing)
FTS Driver IC
(DVDM IC351)
Are not there wire rod coming out, damage the connectors of CN9 and
CN5 on the DVDM Assy ?
Connector / wire rod
Does voltage of CN5-pin 1 on the DVDM Assy change when pressed
the inside switch ?
Inside switch
5
Cannot playback
(Focus does not inn)
Are the signals output from IC351-pin 9 and 10 on the DVDM Assy ?
FTS Driver IC (DVDM IC351)
Does 650 LD emit light ?
Does a pickup lens do up / down ?
Does not an actuator spring bend ?
Pickup
Are not resin part damage, a shaft missing ?
Are not there falling off of turn table, lean abnormality ?
Mechanism Assy
Is not flexible cable of CN7 on the DVDM Assy coming off and
damaged ?
Flexible cable / connector
Is signal output from IC301-pin 123 (FACT) on the DVDM Assy ?
(Device control of around 500 mV is output usually. It is
±
around 100
mV swing by focus up / down.)
FRONT END IC
(DVDM IC301)
6
Cannot playback
(Spindle does not turn)
Are the signals output from IC251-pin 2 (A3), pin 4 (A2) and pin 7 (A1)
on the DVDM Assy ?
It is fixed, and is not there pin 18 HIGH whethere it is fixed, and there is
not pin 23 LOW ?
Spindle Driver IC
(DVDM IC251)
Are not there part falling off, alien substance adhesion in spindle motor
part ?
Mechanism Assy (Spindle motor)
Is not flexible cable of CN7 on the DVDM Assy coming off and
damaged ?
Flexible cable / connector
Is signal output from IC301-pin 123 (SPDL_PDM) on the DVDM Assy ? FRONT END IC (DVDM IC301)
7
Cannot playback
(Playback stops)
Does not 650nm LD deteriorate ?
If there is the both ends voltage of R121 on the DVDM Assy more than
0.7V, 650nm LD deteriorates surely.
650nm LD deteriorates.
(Cannot playback DVD)
Does not 780nm LD deteriorate ?
If there is the both ends voltage of R123 on the DVDM Assy more than
1.2V, 780nm LD deteriorates surely.
780nm LD deteriorates.
(Cannot playback CD)
Is not there abnormality in FG waveform ?
FG output : Spindle Driver IC
(DVDM IC251)
Are not there scratch and a dirt on the disc ?
Disc
8
Picture disturbance during
playback
(block noise, freeze, other)
Are not there scratch and a dirt on the disc ?
Do not you set a disc of standard outside ?
Disc
9
Audio is not output
(Picture is normal)
Check the waveform (BCK, LRCK, MCLK, DATA).
BACK END IC (DVDM IC601)
Is signal output from IC711-pin 7 and 8 on the JCKB Assy ?
AUDIO DAC IC (JCKB IC711)