Pioneer PD-R555RW, Service Manual

Page: 49 / 72

49
PDR-555RW
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 :
TQ82017
TQ82021
T 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.
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
LD emitting
LD not emitting Switching CD, CD-R and CD-RW
Fig.2 During adjustment of LD power (Input selector: analog)
ERASE button
¶
(RECORD) and
•
(REC MUTE)
buttons
7
(STOP) button
+ key
– key
Stop
Focus in
Fig.3 During adjustment of servo system (Input selector: optical)
FINALIZE button
Set
SET button
Average
DIGITAL
SYNCHRO
button
Mode switch
AUTO/MANUAL
button
¶
(RECORD)
button
Sled move
4 1
,
¡ ¢
buttons
•
(REC MUTE)
button
7
(STOP) button
Tracking close
8
(PAUSE) button
Spindle kick
3
(PLAY) button
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.
Short-circuit
Fig. 1 Enter the Test mode
SIDE B
FUNCTION ASSY