Sony MZ-NF810CK Service Manual page 24

MZ-NF810/NF810CK
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
Optical pick-up
objective lens
• Checking method
1. Select the manual mode of test mode (see page 14), and set the
laser power checking mode (item number 010).
Remote commander LCD display
010 Laser
.
2. Press the key continuously until the optical
T
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
t
number 011).
Remote commander LCD display
011 Lrefpw **
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
t
number 012).
Remote commander LCD display
012 HrefPw **
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
t
mode (item number 013).
Remote commander LCD display
013 WrPwLo **
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
t
mode (item number 014).
Remote commander LCD display
014 WrPwHi **
11. Check that the laser power meter reading is 5.93 ± 0.71 mW.
CANCEL/CHG key to quit the manual mode, and
12. Press the x
activate the test mode (display check mode).
24
laser
power meter
Overall Adjustment Mode
• Configuration of Overall Adjustment Mode
Overall adjustment mode
Continuing overall adjustment
key
.
T
key on the
.
remote commander
key
>
t
> key on the
remote commander
VOL+ key
key on the
DISPLAY
remote commander
[END SEARCH]
key
[P MODE]
key on the
remote commander
• Overall Adjustment Mode (Title Display)
Remote commander LCD display
000 Assy**
: (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
Note: Adjust the CD first, when performing adjustment.
key
x
(Title display)
CD overall
adjusting
MO overall
adjusting
Electrical
offset
adjustment
Temperature
correction
and
Power supply
adjustment
auto item feed