4
Disc motor (D.M.) does not rotate.
Does pin 117 of IC401
(TP409) PLCK oscillate around
10 MHz ?
Check peripheral
circuit of IC402.
Check peripheral circuits
of IC402.
Check disc motor and wiring.
N
Y
Focus servo is NG.
Are FE, RFSB,
FSON signals normal?
Check peripheral circuit of IC306.
Do signals output to
pins 9 to 14 of CN501?
Check IC502.
Check wiring for
pickup head.
Lens cleaning.
Replace pickup
mechanism.
Y
Y
N
N
5
FE signal
Pin 150 (TP405)
of IC401
RFSB signal
Pin 152 (TP503)
of IC401
0.3V
1.65V
0.3V
Focus search Focus servo on
Focus servo ON
signal waveform
Fig. 1-3-10
Fig. 1-3-11
Fig. 1-3-12
1-11
Содержание DD-8020
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Страница 30: ...2 10 ...
Страница 34: ...3 4 ...
Страница 39: ...Fig 3 4 5 4 3 3 Front Display Power Switch Block Diagram 3 12 3 11 FWD REV ...
Страница 40: ...m Q502 Q501 PUDET2 IC306 Fig 3 4 6 4 4 Main Block Diagrams 4 4 1 Servo System Block Diagram 3 14 3 13 ...
Страница 41: ...Fig 3 4 7 4 4 2 Logical System Block Diagram 3 16 3 15 ...
Страница 44: ...Fig 3 5 3 5 2 Front Display Power Switch Circuit Diagram 3 22 3 21 ...
Страница 47: ...Fig 3 5 5 5 3 2 Main Circuit Diagram 3 25 3 26 3 27 3 28 ...
Страница 48: ...5 4 Output Circuit Diagram Fig 3 5 6 3 30 3 31 3 32 3 29 ...
Страница 50: ...3 34 5 5 Motor System Circuit Diagram Fig 3 5 8 ...
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