Technics SLDV 250 Service Manual

Page 2

6.1 Self-diagnosis

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The 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
adjustmentBe sure to use the self-diagnosis functionbefore 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 55.

Note:

Press the power button to turn on the power, and check the value within three minutes before the unit

warms up. (Otherwise,

the result will be incorrect.)

'NO DISC" ls dlsplayed, umt
does not play smoothly. etc

Check the laser drive current. <
Value ts 70 IDVD). Value us more than
55 (CD) or less. 70 (DVD). 55 (CD).

Replace the optlcal pckup.
(Refer to the sectron 'OPTICAL
PICKUP REPLACEMENT
PROCEDURE" rn thrs Sunde]

V

Check the laser drlvet .,, .
after replacement.

0 Use the optical pickup self-dragnosie tunctron

Method: With no disc in the player:

IUVD)

- Press the "DISPLAY" buttonr rthe wrote
control umt while pressmg the "ST( >
button on the player

ICDI

. Press the "3 button on . am la control
unrt while pressing the "STCO' Junon on

the player.

[Olsplay conten '

[DVP LDD OC 7

[CD] '30 OOU
._,_

F. tto. setttng

000
9%.

Present value

Replace with a new optical pickup it the present

«all: us more than 60 (DVD). 45 (CD)

Cause. Damage due to static electricity
dunng replacement

erte the pry-t value Il\ he
unit if rt is .J (DVD), 45 (CD) or
less

\

- . .ne op cal packuptrlt
adiI-Qtn' .It. (Reterto the section

TILI ADJUSTMENT in thus
Guide.)

Use the Mt adrustment

rMethod VVIlh no disc In the player

. Press the "DISPLAY" button on the remote
control unnt Mule pressrng the "STOP
button on the player.

Wrrte the present value Into
the player it it re 45 or less

Wrttlng method
. Press the "PAUSE' button on the remote
control unrt Mule pressmg the STOP"

check tu nction .

lnitialrze the player.

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\ button on the player.

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