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3. TROUBLESHOOTING
3-1. Main Circuit
3-1-1. Servo System
(1) Initial Operation after Power ON
Power ON
Send each LSI hard RST
command and initial command.
Pickup head is positioned at
transmission initial position.
Is tray closed?
Pin 5 of CN502,
TCLS=L
Disc presence/absence and
disc judgement
Is a disc present?
DVD or CD initial setting.
DVD single
Initial setting.
DVD dual
Initial setting.
CD
Initial setting.
To each disc playback process.
DVD single (single-layer)
DVD single
(single-layer)/DVD dual
(dual-layer)/CD?
CD
DVD dual (dual-layer)
1
Tray close operation
Pin 126 of IC605: LDMP = H/L
Pin 127 of IC605: LDMN = L
Is tray closed?
Pin 5 of CN502:
TCLS = L
Y
N
Tray stops.
Pin 126 of IC605: LDMP = H
Pin 127 of IC605: LDMN = L
Laser OFF
Display: INSERT DISC
Monitor screen: NO DISC
Y
Y
NG
N
N
2
Fig. 1-3-1
Summary of Contents for SD-120EB
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Page 62: ...Others Before Calling Service Personnel Specifications ...
Page 105: ...4 2 Power Supply Block Diagram Fig 3 4 2 ...
Page 107: ...Fig 3 4 5 4 3 3 Front Display Power Switch Block Diagram ...
Page 108: ...m Q502 Q501 PUDET2 IC306 Fig 3 4 6 4 4 Main Block Diagrams 4 4 1 Servo System Block Diagram ...
Page 110: ...4 4 3 Output RGB Block Diagram Fig 3 4 8 ...
Page 113: ...10 1 3 4 A B C D E G 2 5 6 7 8 9 F Fig 3 5 3 5 2 Front Display Power Switch Circuit Diagram ...
Page 116: ...5 3 2 Main Circuit Diagram Fig 3 5 5 ...
Page 117: ...5 3 2 Main Circuit Diagram ...
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Page 124: ...Fig 3 5 5 ...
Page 126: ...10 1 3 4 A B C D E G 2 5 6 7 8 9 F 5 4 Output RGB Circuit Diagram Fig 3 5 7 ...
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