Sony AM-NX9, Service Manual

Page: 24 / 62

24
AM-NX9
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 and adjusting method
1. Select the manual mode of test mode (see page 13), 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 STOP/CANCEL x key to quit the manual mode, and
activate the test mode (display check mode).
Set LCD display
W r P w H i
014
Overall Adjustment Mode
• Configuration of Overall Adjustment Mode
• Overall Adjustment Mode (Title Display)
Note:
Adjust the CD first, when performing adjustment.
Set LCD display
A s s y * *
000
: (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
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
[DOWN LOAD]
key
STOP
/
CANCEL
x
key
laser
power meter
optical pick-up
objective lens
Set LCD display
L a s e r
010
Set LCD display
L r e f P W
011
Set LCD display
H r e f P W
012
Set LCD display
W r P w L o
013