Sony MDS-JA333ES Service Manual page 33

2. Rotate the lAMSL knob to display "LDPWR ADJUS"
(C04).
(laser power: for adjustment)
3. Press the YES button once to display "LD 0.9mW $
4. Set the lens knob of the laser power meter to 10 mW, press the
YES button, and save the adjustment results in the non-volatile
memory. ("LD SAVE $
time.)
5. "LD 7.0mW $ " is displayed.
6. Rotate the lAMSL knob so that the reading of the laser
power meter is 6.9 to 7.1 mW. Press the YES button and save
it. ("LD SAVE $ " appears for a moment at this time.)
Note: Do not perform the emission of 7.0 mW continuously for
15 seconds and more.
7. Rotate the lAMSL knob to display "LDPWR CHECK"
(C13).
8. Press the YES button once to display "LD 0.9mW $
The reading of laser power meter is 0.85 to 0.91 mW.
9. Press the YES button once to display "LD 7.0mW $
The reading of laser power meter is within the specified value.
Take note of the digital bolt mater reading.
(Optical pick-up label)
(For the checking procedure of
260B
KMS
this value, refer to Section 5-8
24391
"Recording and displaying the
H0528
IOP information".)
IOP = 52.8 mA in this case
IOP (mA) = digital bolt meter reading (mV)/1 (W)
10. Press the MENU/NO button to display "LDPWR CHECK"
(C13) and stop laser emission.
(The MENU/NO button is effective at all times to stop the
laser emission.)
11. Rotate the lAMSL knob to display "lop Write" (C05).
12. Press the YES button and after "Ref=@@@.@" (@ is arbitrary
number.) appears press the YES
"Measu=@@@.@". (@ is arbitrary number.)
13. The changeable value flashes. Input the IOP value that is written
at step 9.
Selecting figure: Rotate the lAMSL knob.
Selecting digit : Press the lAMSL knob.
14. After pressing the YES button, "Complete!" appears for a
moment, and the value is recorded in the non-volatile memory.
Then, "Iop Write" (C05) appears.
Note 1: After step 9, the display of "LD 0.7mW$
6.2mW$ ", "LD Wp
time when pressing the YES button. Operation is not
necessary for these displays.
".
" appears for a moment at this
".
".
button to display
" "LD
$ " is switched every
5-11. Traverse Adjustment
Note1: If the recorded disc is used for this adjustment, the data
is deleted.
Note2: If the traverse waveform is not clear, connect the
oscilloscope as shown below so that it can be seen more
clearly.
BD board
330kΩ
CN110 3-pin (TEO)
CN110 1-pin (VC)
BD board
CN110 3-pin (TEO)
CN110 1-pin (VC)
Adjustment procedure:
1. Connect the oscilloscope to the CN110 3-pin (TEO) and the
CN110 1-pin (VC) of the BD board.
2. Load a recordable disc (any available on the market). (Refer to
Note 1.)
The disc is loaded by pushing the tray.
3. Press the M button to move the optical pick-up outside the
pit.
4. Rotate the lAMSL knob to display "EF MO ADJUS"
(C07).
5. Press the YES button to display "EFB =
(Laser power READ power, focus servo ON, tracking servo OFF,
and spindle (S) servo ON are set)
6. Rotate the lAMSL knob so that the waveform of the
oscilloscope is the specified value. (The figure
= " and the waveform are changed by rotating the
lAMSL knob.) In this adjustment. the waveform varies
at intervals of approx. 2%. Adjust the waveform so that the
specified value is satisfied as much as possible.
(Read power traverse adjustment)
(Traverse waveform)
VC
Specification: A = B
7. Press the YES button to save the adjustment results in the non-
volatile memory. (At this time "EFB =
for a moment, and then "EFB =
Oscilloscope (DC range)
10pF
Oscilloscope (DC range)
V : 0.5V/div
H : 10ms/div
MO-R".
of the " EFB
A
B
SAV" is displayed
MO-W" is displayed.)
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