Optical Pickup Self-Diagnosis And Replacement Procedure - Yamaha DVR-S100 Service Manual

DVR-S100/NX-SW100
I OPTICAL PICKUP SELF-DIAGNOSIS AND REPLACEMENT PROCEDURE
1. Self-diagnosis
An optical pickup self-diagnosis function and tilt adjustment check function have been included in this unit. When repairing,
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 CD laser drive current is more than 55 (70 for DVD).
Note:
Check the value within three minutes after applying the power to the player. (When the unit warms up, the result will be
incorrect.)
"NO DISC" is displayed, unit
does not play smoothly, etc.
Check the laser drive current.
Value is 70 (DVD),
55 (CD) or less.
Replace the optical pickup.
Check the laser drive current
after replacement.
• Write the present value into
the unit if it is 60 (DVD), 45
(CD) or less.
Do the optical pickup tilt
adjustment.
Initialize the player.
In service mode, press "
and "
the player for 3 seconds or
longer.
When not repaired, check the
Module P.C.B.
38
Value is more than
70 (DVD), 55 (CD).
Replace with a new optical pickup if the
preset value is more than 60 (DVD), 45
(CD).
Cause: Damage due to static electricity
Use the tilt adjustment
check function.
"
" buttons on
Method: With no disc in the player:
• While pressing the " " button and
" " button, press the STANDBY/
ON button, and then the service
mode is activated.
• Press the "5" (DVD) button or "7"
(CD) button.
[Display content]
LDD ○○○ ○○○（DVD）
LDC ○○○ ○○○（CD）
Factory Setting Present value
during replacement.
Method: With no disc in the player:
• While pressing the " " button and
" " button, press the STANDBY/
ON button, and then the service
mode is activated.
• Press the "5" (DVD) button or "7"
(CD) button.
Writing method:
• Press the "6" button on the remote
control unit.