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
X
key 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 cover and set the laser power meter on the objective
lens of the optical pick-up.
4. Press the
N
key, 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 resis-
tor R521 at this time is below 44 mV.
7. Press the
N
key, 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 resis-
tor R521 at this time is below 44 mV.
10. Press the
N
key, 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 resis-
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 (–)
L a s e r
0 10
Set LCD display
L r e f P w * *
0 11
Set LCD display
H r e f P w * *
0 12
Set LCD display
S e t T m p * *
0 15
**
: Adjusted value
Set LCD display
W r i t P w * *
0 13
Set LCD display
