Sony HCD-M700 Service Manual ▷ View online
37
HCD-M700
6-4. Auto Check
This test mode performs CREC and CPLAY automatically for
mainly checking the characteristics of the optical pick-up. To
perform this test mode, the laser power must first be checked.
Perform Auto Check after the laser power check and Iop compare.
mainly checking the characteristics of the optical pick-up. To
perform this test mode, the laser power must first be checked.
Perform Auto Check after the laser power check and Iop compare.
Procedure:
1. Display “AUTO CHECK” and press the ENTER/YES “R”
1. Display “AUTO CHECK” and press the ENTER/YES “R”
button. If “LDPWR
” is displayed, it means that the
laser power check has not been performed. In this case,
perform the laser power check and Iop Compare, and then
repeat from step1.
perform the laser power check and Iop Compare, and then
repeat from step1.
2. If a disc is in the mechanical deck, it will be ejected forcibly.
“DISC IN” will be displayed in this case. Load a test disc (MDW-
74/GA-1) which can be recorded.
74/GA-1) which can be recorded.
3. If a disc is loaded at step 2, the check will start automatically.
4. When “XX CHECK” is displayed, the item corresponding to
4. When “XX CHECK” is displayed, the item corresponding to
XX will be performed.
When “06 CHECK” completes, the disc loaded at step 2 will be
ejected. “DISC IN” will be displayed. Load the check disc
(TDYS-1).
When “06 CHECK” completes, the disc loaded at step 2 will be
ejected. “DISC IN” will be displayed. Load the check disc
(TDYS-1).
5. When the disc is loaded in the step 4, the check will automatically
be resumed from “07 CHECK”.
6. After completing to “12 CHECK”, check OK or NG will be
displayed. If all items are OK, “CHK ALL OK” will be displayed.
If any item is NG, it will be displayed as “NG:xxxx”.
If any item is NG, it will be displayed as “NG:xxxx”.
When “CHK ALL OK” is displayed, it means that the optical pick-
up is normal. Check the operations of other parts (spindle motor,
sled motor, etc.).
When displayed as “NG:xxxx”, it means that the optical pick-up is
faulty. In this case, replace the optical pick-up.
up is normal. Check the operations of other parts (spindle motor,
sled motor, etc.).
When displayed as “NG:xxxx”, it means that the optical pick-up is
faulty. In this case, replace the optical pick-up.
6-5. Other Checks
All the following checks are performed by the Auto Check mode.
They therefore need not be performed in normal operation.
6-6. Traverse Check
6-7. Focus Bias Check
6-8. C PLAY Check
6-9. Self-Recording/Playback Check
They therefore need not be performed in normal operation.
6-6. Traverse Check
6-7. Focus Bias Check
6-8. C PLAY Check
6-9. Self-Recording/Playback Check
6-6. Traverse Check
Connection:
Procedure:
1. Connect an oscilloscope to CN105 pin 4 (TE) and CN105 pin
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
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 CHECK”(C14).
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)
(Laser power READ power/Focus servo ON/tracking servo OFF/
spindle (S) servo ON)
6. Observe the waveform of the oscilloscope, and check that the
specified value is satisfied. Do not press the MD
.
“R” or
MD
>
“R” button.
(Read power traverse checking)
Traverse Waveform
7. Press the ENTER/YES “R”
button to display “EFB =
MO-
W”.
8. Observe the waveform of the oscilloscope, and check that the
specified value is satisfied. Do not press the MD
.
“R” or
MD
>
“R” button.
(Write power traverse checking)
Traverse Waveform
Note 1:
Data will be erased during MO reading if a recorded disc is
used in this adjustment.
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.
as shown in the following figure so that it can be seen more
clearly.
+
–
–
oscilloscope
(DC range)
10 pF
330 k
Ω
CN105 pin
4
(TE)
CN105 pin
6
(VC)
BD board
A
B
VC
Specified value : Below 10% offset value
Offset value (%) = X 100
I
A – B
I
2 (A + B)
A
B
VC
Specified value : Below 10% offset value
Offset value (%) = X 100
I
A – B
I
2 (A + B)
+
–
–
oscilloscope
(DC range)
V: 0.1 V/div
H: 10 ms/div
H: 10 ms/div
BD board
CN105 pin
4
(TE)
CN105 pin
6
(VC)
38
HCD-M700
9. Press the ENTER/YES “R”
button to display “EFB =
MO-P”.
Then, the optical pick-up moves to the pit area automatically
and servo is imposed.
Then, the optical pick-up moves to the pit area automatically
and servo is imposed.
10. Observe the waveform of the oscilloscope, and check that the
specified value is satisfied. Do not press the MD
.
“R”
or MD
>
“R” button.
Traverse Waveform
11. Press the ENTER/YES “R”
button to display “EF MO CHECK”
(C14).
The disc stops rotating automatically.
The disc stops rotating automatically.
12. Press the Z MD button and take out the disc.
13. Load the check disc (TDYS-1).
14. Press the MD
13. Load the check disc (TDYS-1).
14. Press the MD
.
“R” or MD
>
“R” button and display
“EF CD CHECK” (C15).
15. Press the ENTER/YES “R”
button to display “EFB =
CD”.
Servo is imposed automatically.
16. Observe the waveform of the oscilloscope, and check that the
specified value is satisfied. Do not press the MD
.
“R”
or MD
>
“R” button.
Traverse Waveform
17. Press the ENTER/YES “R”
button to display “EF CD CHECK”
(C15).
18. Press the Z MD button and take out the check disc (TDYS-1).
Checking Location: BD board (see page 43)
6-7. Focus Bias Check
Change the focus bias and check the focus tolerance amount.
Procedure:
1. Load the test disc (MDW-74/GA-1).
2. Press the MD
Procedure:
1. Load the test disc (MDW-74/GA-1).
2. Press the MD
.
“R” or MD
>
“R” button to display
“CPLAY 1MODE” (C34).
3. Press the ENTER/YES “R”
button to display “CPLAY 1MID”.
4. Press the
MENU/NO “R”
button when “C =
AD =
)” is displayed.
5. Press the MD
.
“R” or MD
>
“R” button to display
“FBIAS CHECK” (C16).
6. Press the ENTER/YES “R”
button to display “
/
c
=
”.
The first four digits indicate the C error rate, the two digits after
[/] indicate ADER, and the 2 digits after [c =] indicate the focus
bias value.
[/] indicate ADER, and the 2 digits after [c =] indicate the focus
bias value.
7. Press the ENTER/YES “R”
button to display “
/
b
=
”.
Check that the C error is about 220 and ADER is below 2.
8. Press the ENTER/YES “R”
button to display “
/
a
=
”.
Check that the C error is about 220 and ADER is below 2.
9. Press the
MENU/NO “R”
button, then press the Z MD button
and take out the test disc.
6-8. C Play Check
MO Error Rate Check
Procedure:
1. Load the test disc (MDW-74/GA-1).
2. Press the MD
1. Load the test disc (MDW-74/GA-1).
2. Press the MD
.
“R” or MD
>
“R” button to display “CPLAY
1MODE” (C34).
3. Press the ENTER/YES “R” button to display “CPLAY 1MID”.
4. The display changes to “C =
4. The display changes to “C =
AD =
)”.
5. If the C error rate is below 20, check that ADER is 00.
6. Press the
6. Press the
MENU/NO “R”
button to stop playback, then press
the Z MD button and take out the test disc.
CD Error Rate Check
Procedure:
1. Load the check disc (TDYS-1).
2. Press the MD
1. Load the check disc (TDYS-1).
2. Press the MD
.
“R” or MD
>
“R” button to display “CPLAY
1MODE” (C34).
3. Press the ENTER/YES “R” button to display “CPLAY 1MID”.
4. The display changes to “C =
4. The display changes to “C =
AD =
)”.
5. Check that the C error rate is below 20.
6. Press the
6. Press the
MENU/NO “R”
button to stop playback, then press
the Z MD button and take out the check disc.
6-9. Self-Recording/playback Check
Prepare a continuous recording disc using the unit to be repaired
and check the error rate.
and check the error rate.
Procedure:
1. Load a recordable disc (blank disc).
2. Press the MD
1. Load a recordable disc (blank disc).
2. Press the MD
.
“R” or MD
>
“R” button to display
“CREC 1MODE” (C35).
3. Press the ENTER/YES “R”
button to display “CREC 1MID”.
4. When recording starts, lights up “
MD ” and display “CREC 1
(@@@@)” (@@@@ is the address).
5. About 1 minute later, press the
MENU/NO “R”
button to stop
continuous recording.
6. Press the MD
.
“R” or MD
>
“R” button to display “CPLAY
1 MODE” (C34).
7. Press the ENTER/YES “R” button to display “CPLAY 1MID”.
8. “C =
8. “C =
AD =
)” will be displayed.
9. Check that the C error becomes below 20 and the AD error
below 2.
10. Press the MENU/NO “R” button to stop playback, then press
the Z MD button and take out the disc.
A
B
VC
Specified value : Below 10% offset value
Offset value (%) = X 100
I
A – B
I
2 (A + B)
A
B
VC
Specified value : Below 10% offset value
Offset value (%) = X 100
I
A – B
I
2 (A + B)
39
HCD-M700
Check the Iop value of the optical pick-up before adjustments.
(Refer to 8. Recording and Displaying the Iop Information)
(Refer to 8. Recording and Displaying the Iop Information)
Connection:
Procedure:
1. Insert the laser power meter probe into the disk insertion slot
1. Insert the laser power meter probe into the disk insertion slot
and set it on top of the objective lens of the optical pick-up.
(When it cannot be set properly, press the
(When it cannot be set properly, press the
m
button or
M
button to move the optical pick-up)
Connect the digital voltmeter to CN105 pin 1 (I+3V) and
CN105pin 2 (Iop) on the BD board.
Connect the digital voltmeter to CN105 pin 1 (I+3V) and
CN105pin 2 (Iop) on the BD board.
2. Press the MD
.
“R” or MD
>
“R” button to display
“LDPWR ADJUST” (C04).
(Laser power : For adjustment)
(Laser power : For adjustment)
3. Press the ENTER/YES “R”
button once to display “L 0.93
mW $
”.
4. Press the MD
.
“R” or MD
>
“R” button until the laser
power meter reading matches with the specified value.
Press the ENTER/YES “R” button after setting the range knob
of the laser power meter to 10mW, and save the adjustment
results. (“LD SAVE $
Press the ENTER/YES “R” button after setting the range knob
of the laser power meter to 10mW, and save the adjustment
results. (“LD SAVE $
” will be displayed for a moment)
Specified Value:
5. Then “L 7.25 mW $
” will be displayed.
7.
Initial Setting of Adjustment Value
Note:
Mode which sets the adjustment results recorded in the non-volatile
memory to the initial setting value. However the results of the tempera-
ture compensation offset adjustment will not change to the initial setting
value.
If initial setting is performed, perform all adjustments again excluding the
temperature compensation offset adjustment.
For details of the initial setting, refer to “4. Precautions for Adjustments”
(See page 35) and execute the initial setting before the adjustment as re-
quired.
memory to the initial setting value. However the results of the tempera-
ture compensation offset adjustment will not change to the initial setting
value.
If initial setting is performed, perform all adjustments again excluding the
temperature compensation offset adjustment.
For details of the initial setting, refer to “4. Precautions for Adjustments”
(See page 35) and execute the initial setting before the adjustment as re-
quired.
Procedure:
1. Press the MD
1. Press the MD
.
“R” or MD
>
“R” button to display
“ADJ CLEAR” (C28).
2. Press the ENTER/YES “R”
button. “Complete!” will be
displayed momentarily and initial setting will be executed, after
which “ADJ CLEAR” (C28) will be displayed.
which “ADJ CLEAR” (C28) will be displayed.
8.
Recording and Displaying the Iop Information
The Iop data can be recorded in the non-volatile memory. The Iop
value on the optical pick-up label and the Iop value after the
adjustment will be recorded. Recording these data eliminates the
need to read the label on the optical pick-up.
value on the optical pick-up label and the Iop value after the
adjustment will be recorded. Recording these data eliminates the
need to read the label on the optical pick-up.
Recording Procedure:
1. Press the MD
1. Press the MD
.
“R” or MD
>
“R” button to display
“Iop Write” (C05), and press the ENTER/YES “R”
button.
2. The display becomes “Ref=@@@.@” (@ is an arbitrary
number) and the numbers which can be changed will blink.
3. Input the Iop value on the optical pick-up label.
To select the number : Press the MD
.
“R” or MD
>
“R”
button.
To select the digit : Press the REC MODE button.
To select the digit : Press the REC MODE button.
4. When the ENTER/YES “R” button is pressed, the display
becomes “Measu=@@@.@” (@ is an arbitrary number).
5. As the adjustment results are recorded for the step 4 value. Leave
it as it is and press the ENTER/YES “R”
button.
6. “Complete!!” will be displayed momentarily. The value will be
recorded in the non-volatile memory and the display will become
“Iop Write” (C05).
“Iop Write” (C05).
Display Procedure:
1. Press the MD
1. Press the MD
.
“R” or MD
>
“R” button to display “Iop
Read”(C26).
2. Press the ENTER/YES “R”
button.
3. “@@.@/##.#” is displayed and the recorded contents are
displayed.
@@.@ indicates the Iop value on the optical pick-up label.
##.# indicates the Iop value after adjustment.
@@.@ indicates the Iop value on the optical pick-up label.
##.# indicates the Iop value after adjustment.
4. To end, press the
MENU/NO “R”
button to display “Iop Read”
(C26).
9.
Temperature Compensation Offset Adjustment
Save the temperature data at that time in the non-volatile memory
as 25 ˚C reference data.
as 25 ˚C reference data.
Note:
1. Usually, do not perform this adjustment.
2. Perform this adjustment in an ambient temperature of 22 ˚C to 28 ˚C.
2. Perform this adjustment in an ambient temperature of 22 ˚C to 28 ˚C.
Perform it immediately after the power is turned on when the internal
temperature of the unit is the same as the ambient temperature of 22 ˚C
to 28 ˚C.
temperature of the unit is the same as the ambient temperature of 22 ˚C
to 28 ˚C.
3. When D101 has been replaced, perform this adjustment after the tem-
perature of this part has become the ambient temperature.
Procedure:
1. Press the MD
1. Press the MD
.
“R” or MD
>
“R” button to display
“TEMP ADJUST” (C03).
2. Press the ENTER/YES “R”
button to select the “TEMP
ADJUST” mode.
3. “TEMP =
[OK]” and the current temperature data will be
displayed.
4. To save the data, press the ENTER/YES “R”
button.
When not saving the data, press the
MENU/NO “R”
button.
5. When the ENTER/YES “R”
button is pressed, “TEMP =
SAVE” will be displayed and turned back to “TEMP ADJUST”
(C03) display then.
(C03) display then.
Specified Value:
The “TEMP =
The “TEMP =
” should be within “E0 - EF”, “F0 - FF”, “00 -
0F”, “10 - 1F” and “20 - 2F”.
10. Laser Power Adjustment
Before starting adjustment:
The adjustment value differs depending on the types (KMS-A260B
or KMS-260E) of optical pickup. Be sure to confirm the type name
before starting adjustment.
The adjustment value differs depending on the types (KMS-A260B
or KMS-260E) of optical pickup. Be sure to confirm the type name
before starting adjustment.
Optical pick-up
objective lens
objective lens
laser
power meter
power meter
+
–
–
BD board
digital voltmeter
CN105 pin
1
(I+3V)
CN105 pin
2
(Iop)
pink
: KMS-260B
white : KMS-260E
UV adhesive =
UV adhesive
Optical pick-up
(KMS-260B/260E)
(KMS-260B/260E)
KMS-260B
0.85 to 0.91mW
KMS-260E
0.90 to 0.96mW
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.
press the ENTER/YES “R” button to save it.
Note:
Do not perform the emission with 7.25mW more than 15 seconds
continuously.
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.
Note down the digital voltmeter reading value.
Specified Value:
Laser power meter reading :
Laser power meter reading :
6.80 to 7.20mW (KMS-260B)
7.00 to 7.50mW (KMS-260E)
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)
(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).
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
To select the number : Press the MD
.
“R” or MD
>
“R”
button.
To select the digit
To select the digit
: Press the REC MODE button.
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).
volatile memory and the display will become “Iop Write” (C05).
Note:
After step 4, each time the ENTER/YES “R”
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
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
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)
(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
(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)
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.
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.
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 (
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”
checking this value, refer to
“8. Recording and Displaying
the Iop Information”
+
–
–
oscilloscope
(DC range)
V: 0.1 V/div
H: 10 ms/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.
“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
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 =
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
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