Sony MZ-E44 Service Manual page 12

Adjusting the OFF-track threshold
• Perform only for Ver. 1.000.
• Only for MO (use AU-1 disk).
• Use the following procedure.
• Monitor (adjust) with a storage oscilloscope.
1. Set in Test mode (Manual mode).
2. Press the PLAYMODE key per 030.
(2.6 volt operating mode
• • • • • •
3. Check that the OP is at the center (not the outermost or inner-
most circumference) and then play the AU-1 disk (031 n 032
n 033).
4. Press the PAUSE key at 033 and adjust the MO ABCD gain.
5. Press the STOP key (030), monitor the OFTRK (SP508) signal
and set the focus ON at 031 with the PLAY key.
H
OFTRK
L
6. The adjustment is okay when the periods for "H" and "L" of the
OFTRK is about equal.
7. Perform an overall adjustment without turning off the power.
8. Perform the following operation when the periods for "H" and
"L" of the OFTRK are not equal.
Press the DISPLAY key 6 times per "030" to set in Memory
mode.
[5C ø] is displayed. Press the remote control p key 6 times and
use the " key 9 times to align at [629].
Shift the figure with the remote control ' , ' keys per the "629"
address and press PAUSE < set > (reset value "OA").
(1) This figure is small when "H" is long.
(2) This figure is large when "L" is long.
Press the DISPLAY key one time to return to [030].
9. Return to 5. Press the PLAY key (remote control " key) again
to set to 031 (Focus ON).
Adjustment in Servo Mode Method
1. When each adjustment mode is set according to the structure of
servo mode, the lower two digits of the mode No. and the ad-
justment value written in EEPROM are displayed and lit on the
LCD on the remote commander.
052
Mode No.
2. When the P key is pressed, the following display appears and
the automatic adjustment is performed.
0 52
Adjustment value (flashing)
Note) Although the VOLUME +/– keys can be used to change
the adjustment value to any value, they should not be
used whenever possible.
Two battery marks light up.)
ø A n ø 9 n ø 8 n
• • • • • • • •
ø A n ø 9 n ø 8 n
• • • • • • • •
Adjustment value (lit)
3. When the automatic adjustment is completed, the flashing ad-
justment value is lit.
0 5 2
– 12 –
Adjustment value (lit)