
1-8
Disc kind misjudgement
(Initial setting is NG.)
Replace pickup head.
Lens cleaning.
Check IC501.
Are FE and SBAD
signals for each disc normal?
Check peripheral
circuit of IC601.
2-2
Y
N
Check laser current.
Check laser current.
50 mA lop 90 mA
Check pins 14, 15
and 16 of IC501
serial bus.
Check peripheral
circuits of IC501,
Q501 and Q502.
lop = Voltage between
E522 and E523/3.3
Ω
Replace pickup
mechanism.
Check wiring for
pickup head.
Check peripheral circuits
of IC501, Q501 and Q502.
lop 90 mA
lop 50 mA
3
Y
Fig. 1-3-4
Fig. 1-3-5
DVD single (single-layer) disc
detection waveform
FE signal
Pin150 (TP504) of IC502
SBAD signal
Pin152 (TP506) of IC502
1.65V
V : 500 mV/div
H : 2 ms/div
DVD dual (dual-layer) disc
detection waveform
V : 500 mV/div
H : 2 ms/div
CD disc
detection waveform
V : 500 mV/div
H : 2 ms/div
Fig. 1-3-6
Fig. 1-3-7
Fig. 1-3-8
Содержание DD-5000
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Страница 35: ...3 9 4 2 Power Supply Block Diagram Fig 3 4 2 ...
Страница 37: ...3 11 3 12 Fig 3 4 5 4 3 3 Front Display Power Switch Block Diagram BF GP1U263X ...
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Страница 42: ...3 21 3 22 Fig 3 5 3 5 2 Front Display Power Switch Circuit Diagram FWY620 1 FWY620 2 10K 220 RN2402 ...
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