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(DVD internal circumference EQ optimization alignment)
DVD internal circumference EQ optimization alignment
Problem/symptom
Check
Waveform
Schematic diagram Reference data
Check for propriety of RF EQ alignment.
3, (35)(38)
C
Voltage table
1 DVD disk unplayable Warp, small 3T, affected by double refraction?
(1)
Defect, eccentricity, surface shaking?
2 DVD disk unplayable Check RF waveform.
Compare with good unit.
C
(2)(3)(4)
CHECK FLOW AND TROUBLE SHOOTING
An extract from "GENERAL FLOW"
Turn on laser.
Focus search
Automatic alignment
Tracking balance
Focus balance
Focus gain
Tracking gain
RF gain
DVD / CD
CD
DVD
Internal circumference
optimization
One-layer
or two-layer
Two-layer
completed
One-layer
Two-layer completed
Layer jump
CD : TOC READ
DVD: CSS processing
Pickup moves outward.
DVD / CD
External
circumference
optimization
STOP
Two-layer
DVD
CD
PLAYBACK
DVD / CD
CD
DVD
Measures error rate
Error judgement
Aligns tracking balance
ERR.
判定
Error judgement
Error judgement
Error judgement
EQB
EQF
Aligns tracking balance
TIME OUT : ERR.
OK
NG
OK
NG
OK
NG
OK
NG
OK
NG
Optimization
One-layer
or two-layer Two-layer
completed
One-layer Two-layer completed
Layer jump
Two-layer
CD
Содержание FISHER DVD-1500 AU
Страница 42: ... 55 MPEG P W BOARD CHECK WAVEFORM 1 2 3 4 5 6 Indicate each signaling in schematic diagram of MPEG P 58 ...
Страница 44: ... 57 MPEG P W BOARD CHECK WAVEFORM 8 9 10 11 12 ...
Страница 65: ... 82 WIRING DIAGRAM DVD A SIDE ...
Страница 66: ... 83 WIRING DIAGRAM DVD B SIDE ...
Страница 67: ... 86 WIRING DIAGRAM MPEG A SIDE for AU ...
Страница 68: ... 87 WIRING DIAGRAM MPEG B SIDE for AU ...
Страница 69: ... 90 WIRING DIAGRAM MPEG A SIDE for US ...
Страница 70: ... 91 WIRING DIAGRAM MPEG B SIDE for US ...
Страница 72: ... 97 AMP for AU WIRING DIAGRAM AMP AMP for US ...
Страница 74: ...SANYO Technosound Co Ltd Osaka Japan Jun 00 2550 BB Printed in Japan ...