74
DV-C503
7.1.7 TROUBLE SHOOTING FOR ELECTRICAL SECTION
• No Power ON
• FL is not turned ON
• FL indication is abnormal • No Play
START
Is FL turn on ?
Is the indication
of FL normal ?
Power ON
Yes
Yes
Yes
Do perform a disc
detection operation ?
(Is downed with the
Traverse mechanism, and
does the rotary tray
go arround it ?
Yes
No
No
No
No
Turn on the power again
after 2 - 3 minutes.
• Blow out fuse of the primary side
• Blow out micro-fuse on the POWER SUPPLY Unit. (Check the each voltage.)
(KUXQ, KCXQ : P202, P203)
(Others : P101, P102, BEA401)
• FL controller IC (IC101) on the FLKY Assy is damaged.
FL indication is dark or flickers.
Indicates the error message
Refer to the section "7.1.4 ERROR CODE".
Refer to the section "7.1.4 ERROR CODE".
Indicate the error message.
• Check the following connections :
POWER SUPPLY Unit - JAC1 Assy, FLKY Assy - JAC1 Assy,
JAC1 Assy - DVDM Assy, JAC1 Assy - TRSB Assy - SSRB Assy,
DVDM Assy - PICKUP Assy, DVDM Assy - SMEB Assy - FGSB Assy
• Check each voltage (EV+5V, +5V (SW), +3.3V (SW), +2.5V (SW), +6V, +12V (SW) and -27V)
(If above voltage are not supplied, check the micro-fuse and short-circuit between each voltages.)
• Check the following connections :
DVDM Assy (CN2) - LOMB Assy (CN31)
DVDM Assy (CN55) - JAC1 Assy (CN902)
JAC1 Assy (CN903) - TRSB Assy (CN11)
TRSB Assy (CN12) - SSRB Assy (CN21)
• Check the +12V and +6V power supply
voltages (If above voltages are not
supplied, check the CPU operation of the
right description.)
• Traverse mechanism down operation :
1
Pin 86 (Clamp signal) of IC11 is "L" level (=0V).
2
Drive signal from pin 42 of IC11 outputs "L" level.
3
Perform the mechanism down operation and pin 86
of IC11 becomes "H" level (=3.3V).
• Disc detection operation :
1
Drive signal from pin 68 of IC11 outputs "L" level.
Rotary tray turns clockwise.
2
Inputs the tray position detecting pulse to pin 95 of IC11.
3
When a disc is put in, inputs the disc detecting pulse to
pin 36 of IC11 while synchronizing the tray position
detecting pulse of
2
.
4
If there is no disc, Indicates "NO DISC" in the FL.
• Check the following connections :
DVDM Assy (CN2) - LOMB Assy (CN31)
DVDM Assy (CN55) - JAC1 Assy (CN902)
JAC1 Assy (CN903) - TRSB Assy (CN11)
TRSB Assy (CN12) - SSRB Assy (CN21)
• Check the +12V and +6V power supply
voltages (If above voltages are not
supplied, check the CPU operation of the
right description.)
• Traverse mechanism down operation :
1
Pin 86 (Clamp signal) of IC11 is "L" level (=0V).
2
Drive signal from pin 42 of IC11 outputs "L" level.
3
Perform the mechanism down operation and pin 86
of IC11 becomes "H" level (=3.3V).
• Tray open operation :
1
In the tray close state, pin 84 of IC11 is "H" level.
2
Drive signal from pin 42 of IC11 outputs "L" level.
3
Perform the tray open operation and pin 84 of IC11
becomes "L" level.
• Check the following connections :
• Check the +12V and +6V power supply
voltages (If above voltages are not
supplied, check the CPU operation of the
right description.)
• Tray close operation :
1
In the tray open state, pin 84 of IC11 is "L" level.
2
Drive signal from pin 42 of IC11 outputs "H" level.
3
Close the tray and pin 84 of IC11 becomes "H" level.
• Disc detection operation :
1
Drive signal from pin 68 of IC11 outputs "L" level.
Rotary tray turns clockwise.
2
Inputs the tray position detecting pulse to pin 95 of IC11.
3
When a disc is put in, inputs the disc detecting pulse to
pin 36 of IC11 while synchronizing the tray position
detecting pulse
• Clamp operation (Traverse mechanism up) :
1
In the mechanism down state, pin 86 of IC11 is "H" level.
2
Drive signal from pin 42 of IC11 outputs "H" level.
3
It becomes the disc clamp state, pin 86 of IC11 becomes
"L" level.
• Short or open the zenner diode on the POWER SUPPLY Unit.
(KUXQ, KCXQ : D207)
(Others : D304)
• Check the values of R180 on the FLKY Assy.
OK
www. xiaoyu163. com
QQ 376315150
9
9
2
8
9
4
2
9
8
TEL 13942296513
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
