FR-155
24
Do not continue the luminescence of 7mW of the laser power for 15 seconds or more.
CN110
5. RF
4. VC
3. TE
2. IOP
1. I+3V
2. PRECAUTIONS
1. Precaution for chacking laser emmition from the laser diode.
Never look into the laser diode when checking the laser emmition durring adjustments.
During so may cause loss of your eyesight.
2. Adjustment information.
Test mode
Replacement pickup Replacement PC board Replacement other parts
TEMP ADJUST
LDPR ADJUST
EFBAL ADJUST
3. Measuring instruments and test disc.
Measuring instruments
Test disc
Laser power meter :
Oscilloscope :
Digital volt meter :
LPM-8010 (manufactured by LEADER)
Band width 40 MHz or higher calibrate the probe prior to measurement.
Digital volt meter
4. Precautions for adjustments.
When an oscilloscope is used to monitor signal waveforms, do not connect the VC to GND inside the oscilloscope.
3. ADJUSTMENT
1. Temperature compensation offset adjustment
2. Laser power adjustment
Save the temperature data at that time in the non-volatile memory as 25 C referance data.
[Note]
1. Usually, do not perform this adjustment.
2. Performe this adjustment in an ambient temperature of 22 C to 28 C.
3.When D101 has been replaced, perform this adjustment after the temperature of this part has become
the ambien temperature.
[Procedure]
1.Enter the test mode select "TEMP ADJUST"
2. Press the MULTI JOG knob.
3. Press the MULTI JOG knob, when data is
memorized.
4. Press the EDIT/CLEAR/NO keyb,when data is
not memorized.
TEMP ADJUST
TEMP= # #
TEMP # # SAVE
TEMP ADJUST
TEMP ADJUST
Present temperature data is shown.
Digital volt meter
To optical pick up
Laser power meter
[Preparation]
1. Connect the digital voltmeter to between
IOP
and
I+3V
of test point
CN110.
2. Install the laser power meter on the objective lens of the laser pick-up.
[Procedure]
1. Enter the test mode select "LD POWER"
2. Press the MULTI JOG knob.
3. Rotate the MULTI JOG knob so that the reading of
laser power meter becomes
from 0.86mW to 0.92 mW.
4. Range of the laser power meter is set in 10mW.
5. Press the MULTI JOG knob.
6. Turn the MULTI JOG knob so that the reading of
laser power meter becomes
from 6.9mW to 7.1mW.
7. Press the MULTI JOG knob.
LDPWR ADJUST
LD 0.9mW $ # #
LD SAVE $ # #
LD 7.0mW $ # #
LD SAVE $ # #
LD 0.9mW $ # #
Do not continue the luminescence of 7mW of the laser power for 15 seconds or more.
[NOTE]
The adjustment value of the laser power
is memorized in non-volatile memory.
The adjustment value of the laser power
is memorized in non-volatile memory.
The adjustment value of the temperature
is memorized in non-volatile memory.
Standard disc for recording/playback)
Operation
Display
Operation
Display
