Sony HCD-M333 Service Manual page 43

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6. Press the . "R" or
the laser power meter becomes the specified value, press
the ENTER/YES "R" button to save it.
Note: Do not perform the emission with 8.65mW more than 15 seconds
continuously.
Specified Value:
KMS-262A
KMS-262E
7. Then,press the
"LDPWR CHECK" (C13).
8. Press the ENTER/YES "R" button once to display "L 0.93mW$
". Check that the reading of the laser power meter matches
with the specified value.
Specified Value:
KMS-262A
KMS-262E
9. Press the ENTER/YES "R" button once more to display "L
8.65mW$ ". 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 :
8.10 to 8.70mW (KMS-262A)
8.40 to 8.90mW (KMS-262E)
Digital voltmeter reading
(Optical pick-up label)
KMS262E
20101
B0576
TE
L 13942296513
lop=57.6 mA in this case
lop (mA) = Digital voltmeter reading (mV)/1 ( Ω )
10. Press the MENU/NO "R" button to display "LDPWR CHECK"
(C13) and stop the laser emission.
(The MENU/NO "R" button is effective at all times to stop
the laser emission)
11. Press the "R" or
.
(C05).
12. Press the ENTER/YES "R" button. When the display becomes
Ref=@@@.@ (@ is an arbitrary number), press the ENTER/
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
14. When the ENTER/YES "R" 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 9, each time the ENTER/YES "R" button is pressed,
the display will be switched to "L 0.73mW$
" "L WP
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
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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 . "R" or
(C06).
2. Press the ENTER/YES "R" button and display "Iop [stop]".
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> "R" button so that the reading of
8.2 to 8.6mW
8.5 to 8.8mW
. "R" or > "R" button to display
0.84 to 0.92mW
0.90 to 0.96mW
: Value on the optical pick-up label ±10%
For details of the method for
checking this value, refer to
"8. Recording and Displaying
the Iop Information"
"R" button to display "Iop Write"
>
"R" or
. >
: Press the TIMER SET "R" button.
", "L 7.70mW$
$ " Nothing needs to be performed here.
x ao
y
i
> "R" button to display "Iop NV Save"
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8
3. After the display changes to "Iop =
the ENTER/YES "R" button.
4. After "Complete!" is displayed momentarily, the display
changes to "Iop 8.4 mW".
5. After the display changes to "Iop=
ENTER/YES "R" button.
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
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.
Q Q
2. Load a disc (any available on the market). (Refer to Note 1)
3 6 7 1 3
3. Press the
the pit.
4. Press the
ADJUST" (C07).
5. Press the ENTER/YES "R" button to display "EFB =
R".
(Laser power READ power/Focus servo ON/tracking servo
OFF/spindle (S) servo ON)
6. Press the
the oscilloscope becomes the specified value.
(When the
"EFB=
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)
"R" button.
Traverse Waveform
VC
7. Press the ENTER/YES "R" button and save the result of
adjustment to the non-volatile memory ("EFB =
will be displayed for a moment. Then "EFB =
be displayed).
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.
2 9 9 4 2 8
oscilloscope
(DC range)
330 k Ω
+
10 pF
oscilloscope
(DC range)
+
–
1 5 0 5 8 2 9 9 4
"R" button to move the optical pick-up outside
M
. "R" or > "R" button to display "EF MO
"R" or "R" button so that the waveform of
. >
. "R" or > "R" button is pressed, the
" changes and the waveform changes) In this adjustment,
Specification A = B
m
co
HCD-M333
9 9
save?", press
save?", press the
–
V: 0.1 V/div
H: 10 ms/div
2 8 9 9
MO-
of
A
B
SAVE"
MO-W" will
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