DM-S500(K) COVER( 98.4.24 9:35 PM y[W 11
DM-S500D
ADJUSTMENT
2) In the test mode, perform the adjustment. After adjust-Adjustment :
ment is completed, cancel the test mode.1. Put the laser power meter on the objective lens of the
OpticalBD boardoptical pick-up. Connect the digital voltmeter to TP1 and
pick-up IC6 D101IC1,IC2,IC10TP2.
1.Temperature compen-2. Turn the SHUTTLE to display OLDPWR ADJU�.
XOOO
sation offset adjustment
2.Laser power adjustment OOXO(Laser power : For adjustment use)
3.Traverse adjustmentOOXO3. Press the PLAY key to display O(0.9mW)$##�.
4.Focus bias adjustment OOXO4. Adjust to turn SHUTTLE so that the laser power meter
5.Error rate confirmationOOXO
reads 0.86 - 0.94mW.
3) Perform the adjustment in the order described.Set range 10mW of the laser power meter,then save to
4) Use the following tools and measurement equipment.press PLAY key.
Y CD test disc TGYS-15. O(7.0mW)$##� is displayed.
Y Laser power meter6. Adjust to turn the SHUTTLE so that laser power meter
Y Oscilloscope (with bandwidth of more than 40 M1 )reads 6.9-7.1mW, then save to press PLAY key.
(Calibrate the probe before measurement.)
("LDPWR<$##" is displayed momentarily.)
Y Digital voltmeter
C Don't output the laser power of 7.0mW more than 15sec.
Y Thermometer
7. Next turn the SHUTTLE to display "LDPWR CHEC".
5) Take care that VC and GND (ground) are not connected
on the oscilloscope when two or more signals are moni-8. Press PLAY key to display "(0.9mW)$##". Check the
tored on the oscilloscope. (VC and GND are short-cir-laser power meter reads 0.85-0.95mW.
cuited in this case.)
9. Next set range 10mW of the laser power meter, then
Note : The "#" display on the screen indicates an arbitrary
press PLAY key to display "(7.0mW)$##". Confirm that
figure.
the laser power meter and digital voltmeterat that time
read the specified value.
3-4 Creating the recordable continuous recording
discSpecification :
This disc is used for focus bias adjustment and error rateReading of laser power meter : 7.0 ?0.1 mW
confirmation. How to create the recordable continuousReading of digital voltmeter : Optical pick-up indication
recording disc is described below.value ?10%
KMS
260A
(Optical pick-up label)
1. Insert a commercial recordable disc (blank disc).27x40
2. Turn the SHUTTLE to display OCREC MODE.�B0825
3. Press the PLAY key to display OCREC MID�.
In this case, lop = 82.5 mA
4. After pressed the PLAY key, a display indicates
lop(mA) = Reading of digital voltmeter (mV)/1(1)
OCREC(0300)� and the recording begins.
5. Terminate the recording within five minutes.
10.Press the PLAY key to display OLDPWR CHEC� and
6. Press the STOP key to stop the recording.
stop the laser emission. (The STOP key can be pressed
7. Press the EJECT key to take out the recordable disc.at any time to stop the laser emission.)
As a result, a continuously recorded disc can be created forNote : The "#" display on the screen indicates an arbitrary
focus bias adjustment and error rate confirmation.figure.
Note :Take care that no vibration is applied during continu-
3-6 Traverse Adjustment
ous recording.
Connection :
3-5 Laser power adjustmentOscilloscope
Connection :
X33
Laser
ADJUSTMENT
power m eter
TE2+
VC-
V: 0.5V/div H: 10ms/div
Objective lens ofINPUT: DC mode
optical pick up
Adjustment :
Digital1. Connect the oscilloscope to (TE2) and (VC) on the X33
voltm eter
board.
2. Insert a commercial recordable disc.
X33
ADJUSTM ENT3. Turn the SHUTTLE to display OEFBAL ADJU�.
TP2+
TP1-
7 |
ACEC
KENWOOD
