1-37
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
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