XL-505E (serv.man5) - Sharp Audio Service Manual (repair manual). Page 12

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2. Step 2 Mode
    When the PLAY key is pressed in the mode above, the laser lighting is turned on.  In this state the laser is only turned on,
    and other operations are not performed.

When the following operation key is pressed in this state, the following operation is performed.
"POWER" ................ The Test Mode is set to off, power is turned off, and the mode is changed to the regular standby mode.
"FF/FWD" ................ While this key is held down, the pickup slides to the external periphery.
"REW/REV" ............. While this key is held down, the pickup slides to the internal periphery.  However, if PU-IN is on, entry is

................................. invalid.

"PLAY" ..................... Shift to Step 3
"STOP" .................... Return to Step 1

3. Step 3 Mode

While the laser is lighting, the focus servo is turned on, and focus search is performed.  If focusing failure occurs, focus search
is repeated until focusing is attained.

When the following operation keys are pressed in this state, the following operations are performed.
"POWER" ................ The Test Mode is set to off, power is turned off, and the mode is changed to the regular standby mode.
"FF/FWD" ................ While this key is held down, the pickup slides to the external periphery.
"REW/REV" ............. While this key is held down, the pickup slides to the internal periphery.  However, if PU-IN is on, entry is

................................. invalid.

"PLAY" ..................... If focusing has been attained, the process proceeds to Step 4.  Unless focusing has been attained,

................................. reception is inhibited.

"STOP" .................... Return to Step 1

4. Step 4 Mode

The disc is rotated and CLV is locked while the tracking servo is off.

The time display indicates always "0:00".

When the following operation keys are pressed in this state, thefollowing operations are performed.
"POWER" ................ The Test Mode is set to off, power is turned off, and the mode is changed to the regular standby mode.
"FF/FWD" ................ While this key is held down, the pickup slides to the external periphery.
"REW/REV" ............. While this key is pressed, the pickup slides to the internal periphery.  However, if PU-IN is on, entry is

................................. invalid.

"PLAY" ..................... Shift to Step 5
"STOP" .................... Return to Step 1