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6. ADJUSTMENT
6.1 DISCS TO BE USED
1. When adjusting the servo system adjustment
CD : Test disc for adjustment (STD-903 or equivalent)
Test disc for inspection (STD-914 or equivalent)
6.2 MEASURING INSTRUMENTS
(1) Laser Power Meter
Following power meter manufactured by Advantest Corporation
or equivalent :
TQ8210 + TQ82017
TQ8215 + TQ82021
TQ8215 + TQ82010 + TQ82017
(2) Audio Analyzer
(3) Oscilloscope
(4) Distortion Factor Meter
(5) CD Jitter Meter
(6) Block Error Rate Counter
6.3 TEST MODE
6.3.1 Test Mode
For adjustment, set the unit to Test mode. To enter Test mode, turn
on the unit with the Test Mode Short-Circuit pattern on the
FUNCTION Assy. In Test mode, all the displays (FL, LEDs) on
the unit should be lit. If not, turn the power off and repeat the same
steps again.
FUNCTION ASSY
SIDE B
Fig. 1 Enter the Test mode
Short-circuit
6.3.2 Operations in Test Mode
In Test mode, the following adjustment functions are assigned to
the buttons, as explained below.
LED for confirmation of
LD emission
ERASE button
Switching CD, CD-R and CD-RW
Fig.2 During adjustment of LD power (Input selector: analog)
¶
4 1,
(RECORD)
¡ ¢
button
buttons
– key
SET button
Sled move
Set
AUTO/MANUAL
FINALIZE button
button
Focus in
Mode switch
3 (PLAY) button
Spindle kick
Fig.3 During adjustment of servo system (Input selector: optical)
6.3.3 How to Playback a Disc in Test Mode
In test mode, since the servos operate independently, playing back a
disc requires that you operate the keys in the correct order to close
the servos.
Here is the key operation sequence for playing back a disc in test
mode.
FINALIZE
Lights up the laser diode and closes the focus servo.
'
PLAY 3
Starts the spindle motor and closes the spindle
servo.
'
PAUSE 8
Close the tracking servo.
'
Wait at least 2 – 3 seconds between each of these operations.
PDR-555RW
¶ (RECORD) and
• (REC MUTE)
buttons
LD emitting
7 (STOP) button
LD not emitting
•
(REC MUTE)
DIGITAL
button
SYNCHRO
+ key
button
Average
7 (STOP) button
Stop
8 (PAUSE) button
Tracking close
49
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