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There are two tray lock functions
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Power on through the SELECTOR /DVD/CD. While holding down the [CD STOP] button on the main unit press the [POWER] button on the main unit or the remote control. Lock Mode A will be entered, [_ _ _ _LOCKED_ _] will be displayedfor 3 seconds, and the current disc will begin playing.
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Lock Mode A will disable the button below while turning the power on or off.
[OPEN/CLOSE]
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When locked in Lock Mode A pressing the [POWER] button on the main unit or the remote control while holding down the [CD STOP] button on the main unit will display [_ _UNLOCKED_ _] and unlock the unit.
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Power on through the SELECTOR DVD/CD. While holding down the [CD PLAY] button on the main unit press the [POWER] button on the main unit or the remote control. Lock Mode B will be entered, [_ _ _LOCKED_ _] will be displayed for 3 seconds,and the current disc will begin playing.
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In Lock Mode B the button below, mainly selector and disc operation related items, will be disabled.
Main Unit: [OPEN/CLOSE] [PAUSE] [STOP] [I<</V] [SELECTOR] [DISK SKIP]
Remote Control: [AUX] [DVD/CD] [TV] [VCR] [TUNER/BAND] [0] ~ [9] [>=10] [DISK]
[I<<] [I>>] [PAUSE] [STOP] [<<] [>>] [REPEAT] [POSITION]
[A-B REPEAT] [MARKER] [DISPLAY] [MIX2ch] [TEST] [TIMER] [FL DISPLAY] [CH SELECT]
[KARAOKE ON/OFF] [KARAOKE DISPLAY] [VOICE] [MUTE]
[ECHO] [b] [#] [CENTER FOCUS] {SEAT POSITION] [RETURN] [DISK SKIP]
[CINEMA] [GROUP] [PAGE]
While playing it is not necessary to re-disable buttons disabled under Lock Mode B.
Also, button related to sound quality are not disabled. The buttons below are not disabled.
Main Unit: [POWER]
Remote Control: [POWER] [DISK MANAGER] [PALY MODE] [CANCEL] [SFC] [SUBWOOFER LEVEL]
[VOL-] [VOL+] [SUPER SURROUND] [DOLBY PROLOGIC] [SUB TITLE] [AUDIO] [ANGLE]
[TOP MENU] [MENU] [ENTER] [<] [>] [^] [V] [MUTING] [PLAY]
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When locked in Lock Mode B pressing the [POWER] button on the main unit or the remote control while holding down the [CD PLAY] button on the main unit will unlock the unit after displaying [_ _UNLOCKED_ _] for 3 seconds.
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Tray lock is canceled when AC power is cut.
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Tray lock A and B functions are exclusive operations. The first one enabled will have priority.
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In Lock Mode A any selector button is allowed to start auto power on.
In Lock Mode B all selector buttons are disable from starting auto power on.
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When a disabled button is pressed while in lock mode [_ _ _LOCKED_ _] will be displayed for 3 seconds on the front display panel.
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Lock mode will be cancelled when a loading error occurs with the CR20.
(If the [OPEN/CLOSE] button were disabled when the tray is opened by a TAKE OUT DISC error recovery would be impossible)