Optical Pickup Self-Diagnosis And Replacement Procedure - Yamaha DVD-S2300MK2 Service Manual

QQ
3 7 63 1515 0
I OPTICAL PICKUP SELF-DIAGNOSIS AND REPLACEMENT PROCEDURE
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.)
• Be sure to perform the following operation in the DVD mode.
Value is 70 (DVD),
55 (CD) or less.
TE
L 13942296513
www
.
http://www.xiaoyu163.com
"NO DISC" is displayed, unit
does not play smoothly, etc.
Check the laser drive current.
Value is more than
70 (DVD), 55 (CD).
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.
Use the tilt adjustment
check function.
Initialize the player.
Press " ", " " and
" " buttons on the
player for 3 seconds or
longer.
x ao u163
y
i
When not repaired, check the
Module P.C.B.
http://www.xiaoyu163.com
2 9
8
Method: With no disc in the player:
Press the "ON SCREEN" button on
the remote control unit while pressing
the " " and "
"
player.
[Display content]
LDD ○○○ ○○○（DVD）
LDC ○○○ ○○○（CD）
Factory Setting
Replace with a new optical pickup if the
Q Q
3 6 7 1 3 1 5
preset value is more than 60 (DVD), 45
(CD).
Cause: Damage due to static electricity
during replacement.
Method: With no disc in the player:
Press the "ON SCREEN" button on
the remote control unit while pressing
the " " and "
"
player.
Writing method:
Press the "
control unit while pressing "
" " buttons on the player.
co
.
DVD-S2300MK2
9 4 2 8
" (DVD) or
"(CD) buttons on the
Present value
0 5 8 2 9 9 4 2 8
" (DVD) or
"(CD) buttons on the
" button on the remote
" and
m
9 9
9 9
13