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CHECK FLOW AND TROUBLE SHOOTING
(DVD
eXhMTIZd
CkCUITIf13renCe
EQ
O@hkatiOII
alkJI'IITN?nt)
An ~~t~~Ct
from "GENERAL
FLCJ,AJ"
I
Wtomatic alignment
Tracking balance
Focus balance
Focus gain
Tracking gain
RF gain
Q
CD
DVD I CD
DVD
Internal
circumference
optimization
22
ompleted
One-layer
<_
CD : TOC READ
DVD : CSS processing
4
Two-layer
:ompleted
I
oEiEEl*-"
I
I
I
I
I
I
I
I
1
I
I
1-
1141igns tracking baiance.1
+
+
EQF
I
I
PLAYBACK
I
!
I
I
I
I
I
1
I
I
I
I
i
I
—.— -—. —-— -
I
DVD
CD
Pickup moves outward
DVD / CD
STOP
Do
External
'd
d+%:
circumference
optimization
ompleted
OK
DVD external circumference
EQ optimization
alignment
Problem/symptom
Check
Waveform
Schematic diagram
Reference data
Check for propriety of RF EQ alignment.
3, (35)(38)
c
1
Two-layer DVD disk unplayable
warp, small 3T, affected by double refraction?
defect, eccentricity, surface shaking?
2
,!
Check RF waveform.
Compare with good unit.
(2)(3)(4)
c
3
,,
Jumps correctly to 2nd layer?
(49)(50)
F
4
Error 22 occurs.
Check TE waveform.
(36)-(38)
J
-14-
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Troubleshooting
