![background image](http://html.mh-extra.com/html/sony/hcd-m700/hcd-m700_service-manual_420803040.webp)
40
HCD-M700
6. Press the MD
.
“R” or MD
>
“R” button so that the
reading of the laser power meter becomes the specified value,
press the ENTER/YES “R” button to save it.
Note:
Do not perform the emission with 7.25mW more than 15 seconds
continuously.
Specified Value:
7. Then,press the MD
.
“R” or MD
>
“R” button to display
“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:
9. Press the ENTER/YES “R”
button once more to display “L
7.25mW$
”. 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 :
6.80 to 7.20mW (KMS-260B)
7.00 to 7.50mW (KMS-260E)
Digital voltmeter reading
: Value on the optical pick-up label
±
10%
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 MD
.
“R” or MD
>
“R” button to display
“Iop Write” (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 MD
“R” or MD
>
“R”
: Press the REC MODE button.
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).
button is pressed,
the display will be switched to “L 0.73mW$
”, “L 6.40mW$
” “L WP
$
” Nothing needs to be performed here.
12. Traverse Adjustment
Connection:
Procedure:
1. Connect an oscilloscope to CN105 pin
4
(TE) and CN105 pin
6
(VC) on the BD board.
2. Load a disc (any available on the market). (Refer to Note 1)
3. Press the
M
button to move the optical pick-up outside the
pit.
4. Press the MD
.
“R” or MD
>
“R” button to display “EF
MO ADJUST” (C07).
5. Press the ENTER/YES “R” button to display “EFB =
MO-
R”.
(Laser power READ power/Focus servo ON/tracking servo
OFF/spindle (S) servo ON)
6. Press the MD
.
“R” or MD
>
“R” button so that the
waveform of the oscilloscope becomes the specified value.
(When the MD
.
“R” or MD
>
“R” button is pressed, the
of “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
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.
KMS260E
20101
H0576
lop=57.6 mA in this case
lop (mA) = Digital voltmeter reading (mV)/1 (
Ω
)
(Optical pick-up label)
For details of the method for
checking this value, refer to
“8. Recording and Displaying
the Iop Information”
+
–
oscilloscope
(DC range)
V: 0.1 V/div
H: 10 ms/div
BD board
CN105 pin
4
(TE)
CN105 pin
6
(VC)
A
B
VC
Specification A = B
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 MD
.
“R” or MD
>
“R” button to display “Iop NV
Save” (C06).
2. Press the ENTER/YES “R” button and display “Iop [stop]”.
3. After the display changes to “Iop =
save?”, press the ENTER/
YES “R” button.
4. After “Complete!” is displayed momentarily, the display changes
to “Iop 7.0 mW”.
5. After the display changes to “Iop=
save?”, press the ENTER/
YES “R” button.
6. When “Complete!” is displayed, it means that Iop NV saving
has been completed.
+
–
oscilloscope
(DC range)
10 pF
330 k
Ω
CN105 pin
4
(TE)
CN105 pin
6
(VC)
BD board
7. Press the ENTER/YES “R” button and save the result of
adjustment to the non-volatile memory (“EFB =
SAVE”
will be displayed for a moment. Then “EFB =
MO-W” will
be displayed).
KMS-260B
6.9 to 7.1mW
KMS-260E
7.2 to 7.3mW
KMS-260B
0.85 to 0.91mW
KMS-260E
0.90 to 0.96mW
www. xiaoyu163. com
QQ 376315150
9
9
2
8
9
4
2
9
8
TEL 13942296513
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299