Denon DCD-3300 - Page 15

(1)
(2)
Turn off the power and disconnect the jumper to pins
(1) and @) of TP-204. Then turn on the power and
operate disc holder open-close .button (4 OPEN/
CLOSE) to load the standard disc.
Note: When TP-204 is shorted, disc holder can not be
opened or closed even though the disc holder
open/close button is pressed. Displace the lock
arm from the lock point enables loading of disc
by drawing the disc holder frontward manually.
In this case, turning on and off the power is not
essential.
Short-circuit pins @) and @) of TP-204 and turn on
the power. Check to see that ” ek "" lights on the
_ display. andconfirm whether “TOTAL” or “SINGLE”
(3)
(4
lighted.
Checking of Focus Servo Operation.
Pushing the play button (» PLAY) starts focus search.
When the disc is loaded, by detecting of a focusing
point of the laser beam on the disc surface to activate
focus servo.
When the disc is not loaded, repeats focus search three
times and then returns to the former state (the condi-
tion before pushing the button).
When the button is continuously pushed, repeats focus
search with or without loading of the disc. When the
button is released, starts detecting a focusing point
within the three times of search operation. In case of
focus servo is properly worked, the position of object
lens of laser pick-up becomes approximately the same
height as actuator cover.
Confirmation of the proper focus servo operation can
be checked by a ‘‘squeak’” sound reproduced when
turning the disc clockwise or counterclockwise with the
hand lightly.
This sound derives from the movement of actuator for
focus servo, so checking of this sound namely to
confirm proper operation of focus servo.
Note: Confirming up and down movements of object
lens enables checking of focus search operation.
Remove the disc and detach the disc clamper so
as to look object lens movement more easily,
then push play button (» PLAY). The object
lens repeats moving three times up and down
then stops. Through this movement the opera-
tion of actuator for focus control can be
checked.
Checking of Spindle Servo
After checking the focus servo, push play button
(> PLAY) again. The disc starts to run.
With this revolution of disc and the indication ‘’2’’
fails on the calendar, the servo operation can be
confirmed.
(5)
(6)
(7)
(8)
Note: If the disc does not run due to spindle servo
malfunction or runs fast, the following “’Check-
ing of Tracking Servo’’ will be impossible.
Checking of Tracking Servo
Push play button { » PLAY) again.
When tracking servo is properly operated, a ‘‘Sizzle”’
sound from the operation of tracking actuator of laser
pick-up will be produced.
Confirm that the indication ‘3’ on the calendar fails.
Note: Same as previous column, if it is not properly
operated the following checking will be im-
possible.
Checking of Slide Servo
Note: Before checking, prepare and insert a head-
phone into the headphone jack with a volume
adjusted to adequate level.
Push play button (» PLAY) again.
When slide servo is properly operated, the indication
“4 fails on the calendar and the sound will be heard
through the headphone.
This sound not always be heard normally, for many
instances it will be heard as if it is muted.
\f there is no sound, the laser pick-up may be
set at disc’s lead-in or lead-out position. For
this case, move the laser pick-up to the program
area referring to the column 2.(3).
Note:
Checking of Playback Sound
@ Connect the line-out of this unit to an appropriate
amplifier so that the playback sound can be
checked.
Push either side of automatic search button ( 4 , PI ).
In this state tracking servo becomes low gain and the
unit becomes normal playing condition.
Checking of General Functions
Turn off the power and disconnect the jumper to pins
(1) and @) of TP-204.
Turn on the power and check all playing controls for
proper functions.
Note: Because of a timing of the microcomputer
employed in the unit, occasionally it does not
accept a command from the button.
In this case do not judge it for defective, repeat
the same check for several times.