Sony MZ-N520 Service Manual page 28

MZ-N520/N520CK
• Adjustment Method of CD and MO Overall Adjustment
Mode
1. Set the test mode (see page 13).
2. Press the key or press
.
key to activate the overall adjustment mode.
Set LCD display
0 00
3. Insert CD disc in the set, and press the
CD overall adjustment mode. Automatic adjustments are made.
Set LCD display
X XX
XXX : Item number for which an adjustment is being executed.
4. In case of CD overall adjustment NG, readjust from the NV
reset (see page 19), The temperature correction (see page 19)
may be omitted.
Set LCD display
0 00
** : NG item number.
5. If OK through the CD overall adjustments, then perform MO
overall adjustments.
Set LCD display
0 00
6. Insert MO disc in the set, and press the > key to set the
MO overall adjustment mode. Automatic adjustments are
made.
Set LCD display
X XX
XXX : Item number for which an adjustment is being executed.
7. In case of MO overall adjustment NG, readjust from the NV
reset (see page 19). The temperature correction (see page 19)
may be omitted.
Set LCD display
0 00
** : NG item number.
28
[VOL --]
on the remote commander
A s s y 1 1
. key to set the
C D R U N
* * * N G
C D O K
M O R U N
* * * N G
8. If OK through the MO overall adjustments, press
the key to return to the test mode and ter-
xCANCEL/CHG
minate the overall adjustment mode.
Set LCD display
0 00
• Overall Adjustment error message
The following message will be displayed if adjustment
procedure is mistaken in the CD and MO overall adjustment.
Message Display timing
During CD/MO/DISC
CLOSE! automatic distinction
overall adjustment
During MO/DISC
automatic distinction
Set CD!
overall adjustment
During offset adjustment
Set MO! During offset adjustment
During CD/MO/DISC
NoTmp! automatic distinction
overall adjustment
During CD/MO/DISC
NoChg! automatic distinction
overall adjustment
• CD and MO Overall Adjustment Items
1. CD overall adjustment items
Item No.
761 VC,VR power supply H/L selection
300 HPIT setting . servo OFF
561 SLED inward movement
562 SLED outward movement
High reflection electrical offset adjustment
312 Laser ON . Focus UP . vc correction
ALFA offset adjustment
313 IJ offset adjustment
314 FE offset adjustment
HPIT adjustment
320 Focus servo ON
324 TE offset adjustment 1
321 TE gain adjustment
328 TWPP gain adjustment
324 TE offset adjustment 1
332 TE offset adjustment 2
330 Tracking servo ON
336 ABCD gain adjustment
337 KF gain correction
338 RF gain adjustment
344 FCS gain adjustment
345 TRK gain adjustment
521 Two-axis sensitivity (inner position)
M O O K
Description
DISC is not inserted.
• CD overall adjustment is not
completed in the MO overall
adjustment.
• CD and MO overall
adjustment is not completed
in the offset adjustment.
MO overall adjustment is not
completed in the offset
adjustment
Temperature correction
(item number 015)
is not finished.
Charge voltage adjustments
(item number 755 and 756)
are not finished.
Description