Yamaha DVD-S795, Руководство по обслуживанию

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DVD-S795/S705
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OPTICAL PICKUP SELF-DIAGNOSIS AND REPLACEMENT PROCEDURE
The optical pickup self-diagnosis function and tilt adjustment check function have been newly added to this player. When repair-
ing, use the following procedure for effective Self-diagnosis and tilt adjustment.
Be sure to use the self-diagnosis function before replacing the optical pickup when “NO DISC” is displayed. As a guideline, you
should replace the optical pickup when the value of the laser drive current is more than 50.
Note
Press the power button to turn on the power, and check the value before the unit warms up (within three minutes).
"NO DISC" is displayed,
unit does not play smoothly, etc.
Replace the optical pickup
(Refer to Assembling and
Disassembling the Optical
Pickup, page 2-1.)
Do the optical pickup
tilt adjustment.
(Refer to Optical Pickup
Tilt Adjustment, page 2-13.)
Check the laser drive
current after replacement.
•
Write the present value into
the unit if it is 40 or less.
Check the laser drive current.
Value is
more than 50 Value is
50 or less
Initialize the player.
Press Pause and and
Open/Close buttons on unit
simultaneously.
End
(Refer to Handling After
Completing Repairs, page 1-9.)
Use the tilt
adjustment
check function.
Replace with a new optical pickup if the present
value is more than 40.
Cause:
Damage due to static electricity during replacement.
•
Use the self diagnosis function below
when NO DISC is displayed or unit
doesn't read a disc, before replacing
the OPU.
•
Use the optical pickup self-diagnosis function.
Method: With no disc in the player.
•
Press the "DISPLAY" button on the
remote control unit while pressing the
"PAUSE" and "OPEN/CLOSE"
button on the player.
Method: With no disc in the player.
•
Press the "DISPLAY" button on the
remote control unit while pressing the
"STILL/PAUSE" and "OPEN/CLOSE"
button on the player.
Writing method:
•
Press the "PAUSE" button on the remote
control unit while pressing the "PAUSE" and
"OPEN/CLOSE" button on the player.
Display content
LD
○○○ ○○○
Factory
preset value Present value
•
Write the present value into
the played if it is 40 or less.
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