Sony CMT-DC500MD / HCD-J300 Service Manual ▷ View online
37
HCD-J300
8. Press the
. “R”
or
> “R”
button so that the waveform of
the oscilloscope becomes the specified value.
(When the
(When the
. “R”
or
> “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.
(Write power traverse adjustment)
the waveform so that the specified value is satisfied as much as
possible.
(Write power traverse adjustment)
Traverse Waveform
9. Press the
ENTER/YES “R”
button, and save the adjustment
results in the non-volatile memory. (“EFB =
SAVE” will be
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.
servo is imposed.
11. Press the
. “R”
or
> “R”
button until the waveform of
the oscilloscope moves closer to the specified value.
In this adjustment, waveform varies at intervals of approx. 2%.
Adjust the waveform so that the specified value is satisfied as
much as possible.
In this adjustment, waveform varies at intervals of approx. 2%.
Adjust the waveform so that the specified value is satisfied as
much as possible.
Traverse Waveform
12. Press the
ENTER/YES “R”
button, and save the adjustment
results in the non-volatile memory. (“EFB =
SAVE” will be
displayed for a moment)
Next “EF MO ADJUST” (C07) is displayed. The disc stops
rotating automatically.
Next “EF MO ADJUST” (C07) is displayed. The disc stops
rotating automatically.
13. Press the Z (MD) button and take out the disc.
14. Load the check disc (TDYS-1).
15. Press the
14. Load the check disc (TDYS-1).
15. Press the
. “R”
or
> “R”
button to display “EF CD
ADJUST” (C08).
16. Press the
ENTER/YES “R”
button to display “EFB =
CD”.
Servo is imposed automatically.
17. Press the
. “R”
or
> “R”
button so that the waveform of
the oscilloscope moves closer to the specified value.
In this adjustment, waveform varies at intervals of approx. 2%.
Adjust the waveform so that the specified value is satisfied as
much as possible.
In this adjustment, waveform varies at intervals of approx. 2%.
Adjust the waveform so that the specified value is satisfied as
much as possible.
Traverse Waveform
18. Press the
ENTER/YES “R”
button, display “EFB =
SAVE”
for a moment and save the adjustment results in the non-volatile
memory.
Next “EF CD ADJUST” (C08) will be displayed.
memory.
Next “EF CD ADJUST” (C08) will be displayed.
19. Press the Z (MD) button and take out the check disc.
Adjustment Location: BD board (see page 39)
13.FOCUS BIAS ADJUSTMENT
Procedure:
1. Load the continuously-recorded disc. (Refer to “5. USING
1. Load the continuously-recorded disc. (Refer to “5. USING
THE CONTINUOUSLY RECORDED DISC” (See page 32))
2. Press the
. “R”
or
> “R”
button to display “CPLAY1
MODE” (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
. “R”
or
> “R”
button to display “FBIAS
ADJUST” (C09).
6. Press the
ENTER/YES “R”
button to display “
/
a =
”.
The first four digits indicate the C1 error rate, the two digits
after “/ ” indicate ADER, and the 2 digits after “a =” indicate
the focus bias value.
after “/ ” indicate ADER, and the 2 digits after “a =” indicate
the focus bias value.
7. Press the
> “R”
button and find the focus bias value at which
the C1 error rate becomes about 200 (refer to Note 2).
8. Press the
ENTER/YES “R”
button to display “
/
b =
”.
9. Press the
. “R”
button and find the focus bias value at which
the C1 error rate becomes about 200.
10. Press the
ENTER/YES “R”
button to display “
/
c =
”.
11. Check that the C1 error rate is below 20 and ADER is 00. Then
press the
ENTER/YES “R”
button.
12. If the “(
)” in “
-
-
(
)” is above 20, press the
ENTER/
YES “R”
button.
If below 20, press the
MENU/NO “R”
button and repeat the
adjustment from step 2.
13. Press thet Z (MD) button and take out the disc.
Note 1: The relation between the C1 error and focus bias is as shown in
the following figure. Find points A and B in the following figure
using the above adjustment. The focal point position C is auto-
matically calculated from points A and B.
using the above adjustment. The focal point position C is auto-
matically calculated from points A and B.
Note 2: As the C1 error rate changes, perform the adjustment using the
average vale.
A
B
VC
Specification A = B
A
B
VC
Specification A = B
A
B
VC
Specification A = B
C1 error
about
200
200
B
C
A
Focus bias value
38
HCD-J300
14. ERROR RATE CHECK
14-1. CD Error Rate Check
Procedure:
1. Load the check disc (TDYS-1).
2. Press the
Procedure:
1. Load the check disc (TDYS-1).
2. Press the
. “R”
or
> “R”
button and display “CPLAY1
MODE” (C34).
3. Press the
ENTER/YES “R”
button twice and display “CPLAY1
MID”.
4. The display changes to “C =
AD =
)”.
5. Check that the C1 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.
14-2. MO Error Rate Check
Procedure:
1. Load the continuously-recorded disc. (Refer to “5. USING
Procedure:
1. Load the continuously-recorded disc. (Refer to “5. USING
THE CONTINUOUSLY RECORDED DISC” (See page 32))
2. Press the
. “R”
or
> “R”
button to display “CPLAY1
MODE” (C34).
3. Press the
ENTER/YES “R”
button to display “CPLAY1MID”.
4. The display changes to “C1 =
AD =
)”.
5. If the C1 error rate is below 50, 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 disc.
15. FOCUS BIAS CHECK
Change the focus bias and check the focus tolerance amount.
Procedure:
1. Load the continuously-recorded disc. (Refer to “5. USING
1. Load the continuously-recorded disc. (Refer to “5. USING
THE CONTINUOUSLY RECORDED DISC” (See page 32))
2. Press the
. “R”
or
> “R”
button to display “CPLAY1
MODE” (C34).
3. Press the
ENTER/YES “R”
button twice to display “CPLAY1
MID”.
4. Press the
MENU/NO “R”
button when “C1 =
AD =
)”
is displayed.
5. Press the
. “R”
or
> “R”
button to display “FBIAS
CHECK” (C16).
6. Press the
ENTER/YES “R”
button to display “
/
c =
”.
The first four digits indicate the C1 error rate, the two digits
after “/ ” indicate ADER, and the 2 digits after “c =” indicate
the focus bias value.
Check that the C1 error is below 20 and ADER is below 2.
after “/ ” indicate ADER, and the 2 digits after “c =” indicate
the focus bias value.
Check that the C1 error is below 20 and ADER is below 2.
7. Press the
ENTER/YES “R”
button and display “
/
b =
”.
Check that the C1 error is below 100 and ADER is below 2.
8. Press the
ENTER/YES “R”
button and display “
/
a =
”.
Check that the C1 error is below 100 and ADER is below 2
9. Press the
MENU/NO “R”
button, then press the Z (MD) button
and take out the disc.
Note:
If the C1 error and ADER are above other than the specified
value at points a (step 8. in the above) or b (step 7. in the above),
the focus bias adjustment may not have been carried out prop-
erly. Adjust perform the beginning again.
value at points a (step 8. in the above) or b (step 7. in the above),
the focus bias adjustment may not have been carried out prop-
erly. Adjust perform the beginning again.
16. AUTO GAIN CONTROL OUTPUT LEVEL
ADJUSTMENT
Be sure to perform this adjustment when the optical pick-up is
replaced.
If the adjustment results becomes “Adjust NG!”, the optical pick-
up may be faulty or the servo system circuits may be abnormal.
replaced.
If the adjustment results becomes “Adjust NG!”, the optical pick-
up may be faulty or the servo system circuits may be abnormal.
16-1. CD Auto Gain Control Output Level Adjustment
Procedure:
1. Load the check disc (TDYS-1).
2. Press the
Procedure:
1. Load the check disc (TDYS-1).
2. Press the
. m “R”
or
M > “R”
button to display “AG
Set (CD)” (C11).
3. When the
ENTER/YES “R”
button is pressed, the adjustment
will be performed automatically.
“Complete!” will then be displayed momentarily when the value
is recorded in the non-volatile memory, after which the display
changes to “AG Set (CD)” (C11).
“Complete!” will then be displayed momentarily when the value
is recorded in the non-volatile memory, after which the display
changes to “AG Set (CD)” (C11).
4. Press the Z (MD) button and take out the check disc.
16-2. MO Auto Gain Control Output Level Adjustment
Procedure:
1. Load the test disc (MDW-74/GA-1).
2. Press the
Procedure:
1. Load the test disc (MDW-74/GA-1).
2. Press the
. “R”
or
> “R”
button to display “AG Set (MO)”
(C10).
3. When the
ENTER/YES “R”
button is pressed, the adjustment
will be performed automatically.
“Complete!” will then be displayed momentarily when the value
is recorded in the non-volatile memory, after which the display
changes to “AG Set (MO)” (C10).
“Complete!” will then be displayed momentarily when the value
is recorded in the non-volatile memory, after which the display
changes to “AG Set (MO)” (C10).
4. Press the Z (MD) button and take out the test disc.
39
HCD-J300
Adjustment and checking Loacation:
Note: It is useful to use the jig for checking the waveform. (Refer to Ser-
vicing Notes on page 8)
D101
CN101
IC101
CN105
IC151
IC190
1
7
1. I+3V
2. IOP
3. GND
4. TE
5. FE
6. VC
7. RF
2. IOP
3. GND
4. TE
5. FE
6. VC
7. RF
– BD BOARD (Component Side) –
– BD BOARD (Conductor Side) –
40
HCD-J300
SECTION 7
DIAGRAMS
7-1. CIRCUIT BOARDS LOCATION
CONTROL board
MAIN board
TC board
LED board
HEAD PHONE board
LOADING board
CD board
BD board
POWER board
OPTICAL board
DIGITAL board
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