Pioneer CDJ-900 Service Manual page 49

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[5] Confirmation of movement of the drive unit
It is within "[3] Indication of Various Information" mode, and the following control becomes possible when the screen of
"5 the drive operation/error rate measurement" is chosen.
This mode consists of "player operation mode" and "test operation mode."
<Player operation mode>
Basic operation of Servo, such as setup, play, pause, and track search, is carried out.
Moreover, measurement of an error rate can also be performed.
<Test operation mode>
Servo operation is finely controllable gradually.
* It becomes player operation mode and shifts to test operation mode by the key input in the beginning.
* The command treated here is for mainly testing a mechanism and a servo system, and is not for DJ functions, such as scan
and tempo.
Function
<Player operation mode>
Servo All Off (Stop)
Play(Trace) / Pause
Track Search Fwd/Rev
Error Rate Count
Eject
Mode Change (-> Test operation mode)
<Test operation mode>
Servo All Off
Slider Move Fwd
Slider Move Rev
Step command
Mode Change (->Player operation mode)
Player operation mode command
Play(Trace) / Pause
If it is in a stop state, it will set up and play. Moreover, if it is in a play state, whenever it will push a button, a pause and a
play are carried out by turns.
It is displayed on a drive state display part as "PLAY or PAUSE."
Track number and time under present trace are displayed. (It becomes a display of four times speed.)
Note: In this mode, even if it inserts a disc, an automatic setup is not carried out.
Moreover, a play is not carrying out audio reproduction, but is tracing the signal side of a disk.
Track Search F/R
Search a track displayed by a FWD / REV course and do pause.
It is indicated with [SEARCH] in the drive condition indication part.
Note: A track search is not possible in CD-ROM (MP3/AAC/WAV/AIFF).
Error Rate Count
I measure an error rate from a present position doing a play/pause for about 20 seconds and display a measurement result
in FL. Usually, a track to measure is made to search and this button is inputted from a pause state.
For example, it is displayed as "3.56E-4 O.K." etc.
If an error rate is less than 3.00E-3, it will be displayed as O.K. If an error rate is larger than 3.00E-3, it will be displayed as
NG.
Measurement with the managed disc at the time of factory shipments is a premise.
The product does not judge whether they are inferior goods at the time of service.
Eject
A disc is ejected. It is indicated with [EJECT] in the indication part.
Mode Change (It shifts to the Test opalation mode.)
If the MASTER TEMPO button is pushed into player operation mode, MASTER TEMPO LED will light up, and it will shift to
the below-mentioned "test operation mode." It is indicated with [TEST MODE] in the indication part.
5
6
Main unit button
TIME
PLAY/PAUSE
TRACK SEARCH FWD/REV
CUE
EJECT
MASTER TEMPO
TIME
SEARCH FWD
SEARCH REV
CUE/LOOP CALL NEXT(d)
MASTER TEMPO
CDJ-900
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7
7
8
A
B
C
D
E
F
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