Sony HCD-CP33 Service Manual page 29

6. Rotate the AMS dial so that the reading of the laser power
meter becomes 6.9 to 7.1 mW, press the ENTER/YES button
and save it.
Note : Do not perform the emission with 7.0 mW more than 15
seconds continuously.
7. Then, rotate the AMS dial and display "LDPWR CHECK".
8. Press the ENTER/YES button once and display "LD 0.9 mW
$ ". Check that the reading of the laser power meter become
0.85 to 0.91 mW.
9. Press the ENTER/YES button once more and display "LD 7.0
mW $ ". Check that the reading the laser power meter and
digital volt meter satisfy the specified value.
Note down the digital voltmeter reading value.
Specified Value :
Laser power meter reading : 7.0 ± 0.1 mW
Digital voltmeter reading : Optical pick-up displayed value ± 10%
(Optical pick-up label)
(For details of the method for checking
KMS
260A
this value, refer to "7-8. Recording and
27X40
Displaying IOP Information".)
B0825
Iop = 82.5 mA in this case
Iop (mA) = Digital voltmeter reading (mV)/1 ( Ω )
10. Press the MENU/NO button and display "LDPWR CHECK"
and stop the laser emission.
(The MENU/NO button is effective at all times to stop the
laser emission.)
11. Rotate the AMS knob to display "Iop.Write".
12. Press the ENTER/YES 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 : Rotate the AMS dial.
To select the digit : Press the AMS dial.
14. When the ENTER/YES 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".
Note 1: After step 4, each time the ENTER/YES button is
pressed, the display will be switched between "LD 0.7
mW $ ", "LD 6.2 mW $
Nothing needs to be performed here.
", and "LD WP $ ".
6-11. TRAVERSE ADJUSTMENT
Connection :
BD board
CN110 pin 3 (TE)
CN110 pin 1 (VC)
Adjusting Procedure :
1. Connect an oscilloscope to CN110 pin 3 (TE) and CN110 pin
1 (VC) of the BD board.
2. Load a disc (any available on the market). (Refer to Note 1.)
3. Press the x button and display the "MD", and then press the
x button and display the "MD", and then press the M button
and move the optical pick-up outside the pit.
4. Rotate the AMS dial and display "EF MO ADJUS" (C11).
5. Press the ENTER/YES button and display "EFB =
(Laser power READ power/Focus servo ON/tracking servo OFF/
spindle (S) servo ON)
6. Rotate the AMS dial so that the waveform of the oscilloscope
becomes the specified value.
(When the AMS dial is rotated, the
and the waveform changes.) In this adjustment, 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 ENTER/YES button and save the result of adjustment
to the non-volatile memory ("EFB =
for a moment. Then "EFB =
8. Rotate the AMS dial so that the waveform of the oscilloscope
becomes the specified value.
(When the AMS dial is rotated, the
and the waveform changes.) In this adjustment, waveform varies
at intervals of approx. 2%. Adjust the waveform so that the
specified value is satisfied as much as possible.
(Write power traverse adjustment)
(Traverse Waveform)
VC
Specification A = B
9. Press the ENTER/YES button, and save the adjustment results
in the non-volatile memory. ("EFB =
displayed for a moment.)
10. "EFB = MO-P". will be displayed.
The optical pick-up moves to the pit area automatically and servo
is imposed.
Oscilloscope
V : 0.5 V/div
H : 10 ms/div
Input : DC mode
MO-R".
of "EFB= " changes
A
B
SAVE" will be displayed
MO-W" will be displayed).
of "EFB- " changes
A
B
SAVE" will be
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