Sony HCD-PX5 Service Manual page 44

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[ENTER/YES]
6. Turn the knob so that the reading of the laser
power meter becomes 6.9 to 7.1 mW, press the
button to save it.
Note: Do not perform the emission with 7.0 mW more than 15 seconds
continuously.
[ENTER/YES]
7. Then, turn the
CHECK" (C13).
[ENTER/YES]
8. Press the button once to display "LD 0.9mW$
". Check that the reading of the laser power meter become
0.85 to 0.91 mW.
[ENTER/YES]
9. Press the button once more to display "LD
7.0mW$ ". Check that the reading the laser power meter
and digital voltmeter satisfy the specified value.
Note down the digital voltmeter reading value.
Specified Value:
Laser power meter reading : 7.0 ± 0.2 mW
Digital voltmeter reading : Value on the optical pick-up label
±10%
(Optical pick-up label)
For details of the method for
KMS262A
checking this value, refer to
20101
"5-8. Recording and Displaying
B0825
the Iop Information"
lOP=82.5 mA in this case
lOP (mA) = Digital voltmeter reading (mV)/1 ( Ω )
[MENU/NO]
10. Press the button to display "LDPWR CHECK"
(C13) and stop the laser emission.
[MENU/NO]
(The button is effective at all times to stop the
TE
laser emission)
L 13942296513
[ENTER/YES]
11. Turn the knob to display "Iop Write" (C05).
[ENTER/YES]
12. Press the button. When the display becomes
Ref=@@@.@ (@ is an arbitrary number), press the
[ENTER/YES]
button to display "Measu=@@@.@" (@ is
an arbitrary number).
13. The numbers which can be changed will blink. Input the Iop
value noted down at step 9.
To select the number : Turn the
To select the digit : Press the
to lights up "IT" indicator, then press the
[ENTER/YES]
14. When the button is pressed, "Complete!" will
be displayed momentarily. The value will be recorded in the
non-volatile memory and the display will become "Iop Write"
(C05).
Note: After step 4, each time the
display will be switched "LD 0.7mW$
and "LD Wp $ ". Nothing needs to be performed here.
Adjustment Location: BD (MD) board (see page 47)
5-11. Iop NV SAVE
Write the reference values in the nonvolatile memory to perform
"Iop compare". As this involves rewriting the reference values, do
not perform this procedure except when adjusting the laser power
during replacement of the optical pick-up and when replacing the
IC102. Otherwise the optical pick-up check may deteriorate.
Note: Perform this function with the optical pick-up set at room
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temperature.
Procedure:
[ENTER/YES]
1. Turn the knob to display "Iop NV Save" (C06).
[ENTER/YES]
.
2. Press the button and display "Iop [stop]".
3. After the display changes to "Iop =xxsave?", press the
[ENTER/YES]
button.
44
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[ENTER/YES]
knob to display "LDPWR
[ENTER/YES]
knob.
[CD SYNC NORM SPEED]
button
[REC MODE]
button.
[ENTER/YES]
button is pressed, the
", "LD 7.5mW$
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y
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8
4. After "Complete!" is displayed momentarily, the display changes
to "Iop 7.0 mW".
5. After the display changes to "Iop=yysave?", press the
[ENTER/YES]
button.
6. When "Complete!" is displayed, it means that Iop NV saving
has been completed.
5-12. TRAVERSE ADJUSTMENT
Note 1:Data will be erased during MO reading if a recorded disc is
used in this adjustment.
Note 2:If the traverse waveform is not clear, connect the oscilloscope
as shown in the following figure so that it can be seen more
clearly.
BD (MD) board
CN105 pin 4 (TE)
CN105 pin 6 (VC)
Connection:
BD (MD) board
CN105 pin 4 (TE)
CN105 pin 6 (VC)
Procedure:
1. Connect an oscilloscope to CN105 pin 4 (TE) and CN105
Q Q
3 6 7 1 3
pin 6 (VC) on the BD (MD) board.
2. Load a disc (any available on the market). (Refer to Note 1)
[CURSOR
3. Turn the
pick-up outside the pit.
[ENTER/YES]
4. Turn the
(C07).
[ENTER/YES]
5. Press the
(Laser power READ power/Focus servo ON/tracking servo
OFF/spindle (S) servo ON)
[ENTER/YES]
6. Turn the
cilloscope becomes the specified value.
[ENTER/YES]
(When the
" changes and the waveform changes) In this adjustment,
waveform varies at intervals of approx. 2%. Adjust the wave-
form so that the specified value is satisfied as much as pos-
sible.
(Read power traverse adjustment)
",
Traverse Waveform
VC
Specification A = B
[ENTER/YES]
7. Press the
ment to the non-volatile memory ("EFB =
displayed for a moment. Then "EFB =
played).
u163
.
2 9 9 4 2 8
oscilloscope
(DC range)
330 k Ω
+
–
10 pF
oscilloscope
(DC range)
+
V: 0.1 V/div
–
H: 10 ms/div
1 5 0 5 8 2 9 9 4
]
m ? M knob to move the optical
knob to display "EF MO ADJUST"
button to display "EFB =
knob so that the waveform of the os-
knob is turned, the
A
B
button and save the result of adjust-
SAVE" will be
m
MO-W" will be dis-
co
9 9
2 8 9 9
MO-R".
of "EFB=