Service manual

24
MZ-NE410
Laser Power Check and Adjustment
• Connection
• Checking and adjusting 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 > key, and set the laser MO read adjustment mode
(item number 011).
5. Check that the laser power meter reading is 0.754 ± 0.13 mW.
6. If the reading value is not satisfied, adjust with the
[VOL +]
or [VOL --] key so that the power meter reading becomes the
specification value. Press the ENT/u key to write the ad-
justed value.
7. Press the > key, and set the laser CD read adjustment mode
(item number 012).
8. Check that the laser power meter reading is 0.896 ± 0.16 mW.
9. If the reading value is not satisfied, adjust with the [VOL +]
or [VOL --] key so that the power meter reading becomes the
specification value. Press the ENT/u key to write the ad-
justed value.
10. Press the > key, and set the laser MO (X2 speed) write
adjustment mode (item number 013).
11. Check that the laser power meter reading is 4.93 ± 0.59 mW.
12. If the reading value is not satisfied, adjust with the [VOL +]
or [VOL --] key so that the power meter reading becomes the
specification value. Press the ENT/u key to write the ad-
justed value.
13. Press the > key, and set the laser MO (X4 speed) write ad-
justment mode (item number 014).
14. Check that the laser power meter reading is 5.98 ± 0.71mW.
15. If the reading value is not satisfied, adjust with the [VOL +]
or [VOL --] key so that the power meter reading becomes the
specification value. Press the ENT/u key to write the ad-
justed value.
16. Press the x/CANCEL key to quit the manual mode, and ac-
tivate the test mode (display check mode).
laser
power mete
r
optical pick-up
objective lens
Set LCD display
Laser
010
Set LCD display
###S**
011
address adjusted value
Set LCD display
###S**
012
address adjusted value
Set LCD display
###S**
013
address adjusted value
Set LCD display
###S**
014
address adjusted value
Overall Adjustment Mode
• Configuration of Overall Adjustment Mode
• Overall Adjustment Mode (Title Display)
Note: Adjust the CD first, when performing adjustment.
: (Disc mark) At end of power supply adjustment: Outside lit
**: Left side = MO overall adjustment information
F*: MO overall adjustment completed
1*: Manual adjustment exists (overall adj. not completed)
0*: Not adjusted
Right side = CD overall adjustment information
*F: CD overall adjustment completed
*1: Manual adjustment exists (overall adj. not completed)
*0: Not adjusted
Set LCD display
Assy**
000
Overall adjustment mode
(Title display)
"Assy**"
Continuing overall adjustment
. key
> key
CD overall
adjusting
MO overall
adjusting
Electrical
offset
adjustment
Temperature
correction
and
Power supply
adjustment
auto item feed
[VOL +] key
[VOL -] key
x/CANCEL key