24
MZ-N707
TEMPERATURE CORRECTION
•Adjustment Method of Temperature Correction
1. Select the manual mode of test mode, and set the item number
015 (see page 14).
2. Measure the ambient temperature.
3. Adjust with [VOL +], [VOL --] key so that the adjusted value
(hexadecimal value) becomes the ambient temperature.
(Initial value: 19h = 25 °C, Adjusting range: 80h to 7fh (–128
°C to +127 °C)
4. Press the Xkey to write the adjusted value.
LASER POWER CHECK
•Connection
•Checking Method
1. Select the manual mode of test mode (see page 14), and set
the laser power adjusting mode (item number 010).
2. Press the .key continuously until the optical pick-up
moves to the most inward track.
3. Open the cov er and set the laser power meter on the objective
lens of the optical pick-up.
4. Press the Nkey, and set the laser MO read adjustment mode
(item number 011).
5. Check that the laser power meter reading is 0.81 ± 0.08 mW.
6. Check that the voltage both ends (TP (+) and TP (–)) of r esis-
tor R521 at this time is below 44 mV.
7. Press the Nkey, and set the laser CD read adjustment mode
(item number 012).
8. Check that the laser power meter reading is 0.97 ± 0.10 mW.
9. Check that the voltage both ends (TP (+) and TP (–)) of r esis-
tor R521 at this time is below 44 mV.
10. Press the Nk ey , and set the laser MO write adjustment mode
(item number 013).
11. Check that the laser power meter reading is 4.95 ± 0.50 mW.
12. Check that the voltage both ends (TP (+) and TP (–)) of r esis-
tor R521 at this time is below 80 mV.
13. Press the x/CHG key to quit the manual mode, and activate
the test mode (display check mode).
Checking and Connection Location: MAIN board
(see page 25)
digital voltmeter
MAIN board
laser
power meter
Optical pick-up
objective lens
TP (+)
TP (–)
Laser
0 10
Set LCD display
LrefPw **
0 11
Set LCD display
HrefPw **
0 12
Set LCD display
SetTmp **
0 15
**
: Adjusted value
Set LCD display
WritPw **
0 13
Set LCD display