26
MZ-NF610
Laser Power Check
Note:
If result of measurement of the laser power does not satisfy the
specification, either replace the OP (optical pick-up unit) or check
whether the laser circuit block is working correctly.
When the result of laser power measurement does not satisfy the
specification even though the laser circuit block is confirmed to be
working correctly, replace the OP (optical pick-up unit).
• Connection
• Checking method
1. Select the manual mode of test mode (see page 14), and set the
laser power checking 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
>
key, and set the laser MO read check mode
(item number 011).
5. Check that the laser power meter reading is 0.800 ± 0.10 mW.
6. Press the
>
key, and set the laser CD read check mode (item
number 012).
7. Check that the laser power meter reading is 0.910 ± 0.11 mW.
8. Press the
>
key, and set the laser MO (X2 speed) write
check mode (item number 013).
9. Check that the laser power meter reading is 4.95 ± 0.59 mW.
10. Press the
>
key, and set the laser MO (X4 speed) write
check mode (item number 014).
11. Check that the laser power meter reading is 5.93 ± 0.71mW.
12. Press the
x
CANCEL/
CHG
key to quit the manual mode, and
activate the test mode (display check mode).
Overall Adjustment Mode
• Configuration of Overall Adjustment Mode
0 10
L a s e r
Set LCD display
Set LCD display
# # # S * *
0 11
address
adjusted value
laser
power meter
optical pick-up
objective lens
Set LCD display
# # # S * *
0 12
address
adjusted value
Set LCD display
# # # S * *
0 13
address
adjusted value
Set LCD display
# # # S * *
0 14
address
adjusted value
VOL+
key
.
key
>
key
x
key
Overall adjustment mode
(Title display)
Continuing
overall adjustment
[END SEARCH]
key
Electrical
offset
adjustment
MO overall
adjustment
CD overall
adjustment
Temperature
correction
and
Power supply
adjustment
auto item feed
