Sony HCD-CP500MD Service Manual page 35

6. Press the . "R" or > "R"
of the laser power meter becomes the specified value, press the
ENTER/YES "R" button to save it.
KMS-260B
SPECIFIED VALUE
KMS-260E
Note: Do not perform the emission with 7.0 mW more than 15 seconds
continuously.
7. Then, press the . "R"
"LDPWR CHECK" (C13).
8. Press the ENTER/YES "R"
". Check that the reading of the laser power meter matches
with the specified value as described in the following table.
KMS-260B
SPECIFIED VALUE
KMS-260E
9. Press the ENTER/YES "R"
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 :
KMS-260B
SPECIFIED VALUE
KMS-260E
: Value on the optical pick-up label ±10%
Digital voltmeter reading
(Optical pick-up label)
For details of the method for
KMS260B
checking this value, refer to
20101
"8. Recording and Displaying
H0576
the Iop Information"
lOP=57.6 mA in this case
lOP (mA) = Digital voltmeter reading (mV)/1 ( Ω )
10. Press the button to display "LDPWR CHECK"
MENU/NO "R"
(C13) and stop the laser emission.
(The button is effective at all times to stop the
MENU/NO "R"
laser emission)
11. Press the . "R" or > "R"
(C05).
12. Press the ENTER/YES "R"
Ref=@@@.@ (@ is an arbitrary number), press the
YES "R" 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 : Press the
To select the digit : Press the
14. When the ENTER/YES "R"
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 to "LD 0.7mW$
Nothing needs to be performed here.
The method of identifying the optical pick-up (KMS-260B/260E)
Pink : KMS-260B
UV adhesive agent =
White : KMS-260E
UV adhesive agent
button so that the reading
6.7 to 7.1 mW
7.2 to 7.3 mW
or > "R" button to display
button once to display "LD 0.9mW$
0.85 to 0.91 mW
0.90 to 0.96 mW
button once more to display "LD
6.8 to 7.2 mW
7.0 to 7.5 mW
button to display "Iop Write"
button. When the display becomes
ENTER/
. "R" or > "R button.
[REC MODE]
button.
button is pressed, "Complete!" will
ENTER/YES "R" button is pressed, the
" and "LD 6.2mW$
Optical pick-up
(KMS-260B/260E)
HCD-CP500K/CP500MD
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 temperature.
Procedure:
1. Press the or
. "R" > "R"
2. Press the
ENTER/YES "R"
3. After the display changes to "Iop =xxsave?", press the
button.
YES "R"
4. After "Complete!" is displayed momentarily, the display changes
to "Iop 7.0 mW".
5. After the display changes to "Iop=yysave?", press the
button.
YES "R"
6. When "Complete!" is displayed, it means that Iop NV saving
has been completed.
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
330 k Ω
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 pin
6 (VC) on the BD (MD) board.
2. Load a disc (any available on the market). (Refer to Note 1)
3. Press the button to move the optical pick-up outside
M "R"
the pit.
4. Press the . "R" or > "R"
ADJUST" (C07).
5. Press the
ENTER/YES "R"
(Laser power READ power/Focus servo ON/tracking servo OFF/
spindle (S) servo ON)
6. Press the . "R" or > "R"
the oscilloscope becomes the specified value.
(When the . "R" or > "R"
"EFB= " changes 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 "R"
adjustment to the non-volatile memory ("EFB =
be displayed for a moment. Then "EFB =
displayed).
button to display "Iop NV Save" (C06).
button and display "Iop [stop]".
ENTER/
ENTER/
oscilloscope
(DC range)
+
–
10 pF
oscilloscope
(DC range)
+
V: 0.1 V/div
–
H: 10 ms/div
button to display "EF MO
button to display "EFB = MO-R".
button so that the waveform of
button is pressed, the
A
B
button and save the result of
SAVE" will
MO-W" will be
of
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