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SC9641 reposit to 600MS
Confirm SLDGE
reposit or not?
YES
Start playback without Disc
Confirm Pick up
raise up down
focus aging
YES
Judge focus open
?
or close
Servohead inspect no disc
Put disc and then re-start playback
YES
Whether disc is
stepped-up
playback
Whether the 56pin
information of SC9641
raise change from high to
low
YES
Have lock track.under regular
condition, can find every drive
wave(figure-3)
Check SLED output and
NO
drive circuit, see Figure 1
Checking FOC drive
NO
information,see Figure2
Inspect the informationo of
NO
LDON and the laser control
cricuit of SA9618
Whether focus is regular or
NO
not, inspect focus reposit
Track raise change and can
NO
not block the original track,
inspect track
6 – 2
< Z1 : 2.5M >
IC902 19
CH1 10:1
1.00 V/div
DC Full
< Z1 : 2M >
3
IC902 4
IC901 64
CH1 10:1
CH1 10:1
2.00 V/div
2.00 V/div
DC Full
DC Full
IC902 10
IC902 19
IC902 24
IC902 4
Freq(C1)
40.00000kHz
FR-A(C4)
43.75492kHz
CH1 10:1
CH2 10:1
CH3 10:1
2.00 V/div
2.00 V/div
2.00 V/div
DC Full
DC Full
DC Full
XL-UH4H
CH 4
500ms/div
Display
OFF
ON
Position
-0.20div
Coupling
DC1M
Probe
10:1
Offset
0:32 V
Bandwidth
Full
Edge CH4
Auto
0.50 V
1s/div
Freq (C1)
22.22222kHz
Edge CH4
Auto
0.50 V
CH 4
< Z1 : 2M >
1s/div
Display
OFF
ON
Position
- 3.00div
Coupling
DC1M
Probe
10:1
Offset
0:82 V
Bandwidth
Freq(C2)
50.00000kHz
Full
CH4 10:1
Edge CH4
2.00 V/div
Auto
DC Full
0.50 V
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