Sony DHC-MD5 / HCD-MD5 Service Manual ▷ View online
– 21 –
5-5. TEMPERATURE COMPENSATION OFFSET
ADJUSTMENT
Save the temperature data at that time in the non-volatile memory
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
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. Perform it immediately after the power is turned on when
the internal temperature of the unit is the same as the ambient
temperature.
the internal temperature of the unit is the same as the ambient
temperature.
3. When D101 has been replaced, perform this adjustment after
the temperature of this part has become the ambient tempera-
ture.
ture.
Adjusting Method:
1. Turning the MULTI JOG dial and display “TEMP ADJUST”.
2. Press the ENTER/YES key and select the “TEMP ADJUST”
1. Turning the MULTI JOG dial and display “TEMP ADJUST”.
2. Press the ENTER/YES key and select the “TEMP ADJUST”
mode.
3. “TEMP = ” and the current temperature a data will be dis-
played.
4. To save the data, press the ENTER/YES key.
When not saving the data, press the EDIT/NO key.
5. When the ENTER/YES key is pressed, “TEMP= SAVE”
will be displayed for some time, followed by “TEMP ADJUST”.
When the EDIT/NO key is pressed, “TEMP ADJUST” will be
displayed.
When the EDIT/NO key is pressed, “TEMP ADJUST” will be
displayed.
Specifications:
The temperature should be within “E0-EF”, “F0-FF”, “00-0F”,
“10-1F” and “20-2F”.
The temperature should be within “E0-EF”, “F0-FF”, “00-0F”,
“10-1F” and “20-2F”.
5-6. LASER POWER ADJUSTMENT
Connection:
Adjusting Method:
1. Set the laser power meter on the objective lens of the optical
1. Set the laser power meter on the objective lens of the optical
pick-up. (When it cannot be set properly, press the
0 key or
) key and move the optical pick-up.)
Connect the digital voltmeter to TP (IOP) and TP (I+5V).
Connect the digital voltmeter to TP (IOP) and TP (I+5V).
2. Turning the MULTI JOG dial and display “LDPWR ADJUST”.
(Laser power: For adjustment)
3. Press the ENTER/YES key twice and display “LD $ 4B
=3.5mW”.
4. Adjust RV102 of the BD (MD) board so that the reading of the
laser power meter becomes 3.4 mW.
5. Press the ENTER/YES key and display “LD $96=7.0 mW”.
(Laser power: MO writing)
6. Check that the laser power meter and digital voltmeter readings
satisfy the specified value.
Specification:
Laser power meter reading
: 7.0 ± 0.3 mW
Digital voltmeter reading
: Optical pick-up displayed value ±10%
7. Press the ENTER/YES key and display “LD $ 0F=0.7 mW”.
(Laser power: MO reading)
8. Check that the laser power meter at this time satisfied the speci-
fied value.
Specification:
Laser power meter reading: 0.70 ± 0.1 mW
9. Press the EDIT/NO key and display “LDPWR ADJUST”, and
stop laser emission.
(The EDIT/NO key is effective at all times to stop the laser
emission.)
(The EDIT/NO key is effective at all times to stop the laser
emission.)
KMS210A
27X40
B0825
B0825
lOP=82.5 mA in this case
lOP (mA) = Digital voltmeter reading (mV)/1 (
lOP (mA) = Digital voltmeter reading (mV)/1 (
Ω
)
(Optical pick-up label)
Optical pick-up
objective lens
laser
power meter
power meter
+
–
–
BD (MD) board
TP (I+5V)
TP (IOP)
digital voltmeter
+0.1
–0
–0
– 22 –
5-7. TRAVERSE (E-F BALANCE) ADJUSTMENT
Note 1)
Data will be erased during MO reading if a recorded
disc is used in this adjustment.
disc is used in this adjustment.
Note 2)
If the traverse waveform is not clear, connect the os-
cilloscope as shown in the following figure so that it
can be seen more clearly.
cilloscope as shown in the following figure so that it
can be seen more clearly.
11. Turning the MULTI JOG dial until the waveforms of the oscil-
loscope moves closer to the specified value.
In this adjustment, waveform varies at intervals of approx. 3%.
Adjust the waveform so that the specified value is satisfied as
much as possible.
In this adjustment, waveform varies at intervals of approx. 3%.
Adjust the waveform so that the specified value is satisfied as
much as possible.
9. Press the ENTER/YES key, display “EFB=$ SAVE” for a
moment and save the adjustment results in the non-volatile
memory.
Next “EFBAL MO-P” is displayed.
memory.
Next “EFBAL MO-P” is displayed.
10. Press the ENTER/YES key and display “EFB=$ MO-P”.
The optical pick-up moves to the pit area automatically and servo
is imposed.
is imposed.
+
–
–
oscilloscope
10 pF
330 k
Ω
TP (TEO)
TP (VC)
Connection:
+
–
–
BD (MD) board
TP (TEO)
TP (VC)
oscilloscope
Adjusting Method:
1. Connect an oscilloscope to TP (TEO) and TP (VC) of the BD
1. Connect an oscilloscope to TP (TEO) and TP (VC) of the BD
(MD) board.
2. Load a MO disc (any available on the market).
3. Press the
3. Press the
0 key or ) key and move the optical pick-up
outside the pit.
4. Turning the MULTI JOG dial and display “EFBAL ADJUST”.
5. Press the ENTER/YES key and display “EFBAL MO-W”.
5. Press the ENTER/YES key and display “EFBAL MO-W”.
(Laser power WRITE power/Focus servo ON/tracking servo
OFF/spindle (S) servo ON)
OFF/spindle (S) servo ON)
6. Adjust RV101 of the BD (MD) board so that the waveform of
the oscilloscope becomes the specified value.
(MO groove write power traverse adjustment)
(MO groove write power traverse adjustment)
(Traverse Waveform)
A
B
VC
specification: A=B
7. Press the ENTER/YES key and display “EFB=$ MO-R”.
(Laser power: MO reading)
8. Turning the MULTI JOG dial so that waveforms of the oscillo-
scope becomes the specified value.
(When the MULTI JOG dial is turned, the of “EFB= ”
changes and the waveform changes.) in this adjustment, wave-
form varies at intervals of approx. 3%. Adjust the waveform so
that the specified value is satisfied as much as possible.
(MO groove read power traverse adjustment)
(When the MULTI JOG dial is turned, the of “EFB= ”
changes and the waveform changes.) in this adjustment, wave-
form varies at intervals of approx. 3%. Adjust the waveform so
that the specified value is satisfied as much as possible.
(MO groove read power traverse adjustment)
(Traverse Waveform)
A
B
VC
specification: A=B
(Traverse Waveform)
12. Press the ENTER/YES key, display “EFB=$
SAVE” for a
moment and save the adjustment results in the non-volatile
memory.
Next “EFBAL CD” is displayed. The disc stops rotating auto-
matically.
memory.
Next “EFBAL CD” is displayed. The disc stops rotating auto-
matically.
13. Press the
§ (MD) key and remove the MO disc.
14. Load the test disc TDYS-1.
15. Press the ENTER/YES key and display “EFB=$
15. Press the ENTER/YES key and display “EFB=$
CD”. Servo
is imposed automatically.
16. Turning the MULTI JOG dial so that the waveforms of the os-
cilloscope moves closer to the specified value.
In this adjustment, waveform varies at intervals of approx. 3%.
Adjust the waveform so that the specified value is satisfied as
much as possible.
In this adjustment, waveform varies at intervals of approx. 3%.
Adjust the waveform so that the specified value is satisfied as
much as possible.
A
B
VC
specification: A=B
17. Press the ENTER/YES key, display “EFB=$ SAVE” for a
moment and save the adjustment results in the non-volatile
memory.
Next “EFBAL ADJUST” is displayed.
memory.
Next “EFBAL ADJUST” is displayed.
18. Press the
§ (MD) key and remove the test disc TDYS-1.
(Traverse Waveform)
A
B
VC
specification: A=B
– 23 –
5-9. ERROR RATE CHECK
5-9-1.
CD Error Rate Check
Checking Method:
1. Load a test disc TDYS-1.
2. Turning the MULTI JOG dial and display “CPLAY MODE”.
3. Press the ENTER/YES key twice and display “CPLAY MID”.
4. “C1= AD= – –” is displayed.
5. Check that the C1 error is below 20.
6. Press the EDIT/NO key, stop playback, press the
1. Load a test disc TDYS-1.
2. Turning the MULTI JOG dial and display “CPLAY MODE”.
3. Press the ENTER/YES key twice and display “CPLAY MID”.
4. “C1= AD= – –” is displayed.
5. Check that the C1 error is below 20.
6. Press the EDIT/NO key, stop playback, press the
§ (MD)
key, and remove the test disc.
5-9-2.
MO Error Rate Check
Checking Method:
1. Load a continuously recorded disc (Refer to “5-4. Creating MO
1. Load a continuously recorded disc (Refer to “5-4. Creating MO
Continuously Recorded Disc”.)
2. Turning the MULTI JOG dial and display “CPLAY MODE”.
3. Press the ENTER/YES key twice and display “CPLAY MID”.
4. “C1= AD= ” is displayed.
5. If the C1 error rate is below 50, check that ADER is 00.
6. Press the EDIT/NO key, stop playback, press the
3. Press the ENTER/YES key twice and display “CPLAY MID”.
4. “C1= AD= ” is displayed.
5. If the C1 error rate is below 50, check that ADER is 00.
6. Press the EDIT/NO key, stop playback, press the
§ (MD)
key, and remove the continuously recorded disc.
5-10. FOCUS BIAS CHECK
Change the focus bias and check the focus tolerance amount.
Checking Method:
1. Load a continuously recorded disc (Refer to “5-4. Creating MO
Checking Method:
1. Load a continuously recorded disc (Refer to “5-4. Creating MO
Continuously Recorded Disc”.)
2. Turning the MULTI JOG dial and display “CPLAY MODE”.
3. Press the ENTER/YES key twice and display “CPLAY MID”.
4. Press the EDIT/NO key when “C1= AD= ” is
displayed.
5. Turning the MULTI JOG dial and display “FBIAS CHECK”.
6. Press the ENTER/YES key and display “ / c= ”.
6. Press the ENTER/YES key and 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 50 and ADER is 00.
after [/] indicate ADER, and the 2 digits after [c=] indicate the
focus bias value.
Check that the C1 error is below 50 and ADER is 00.
7. Press the ENTER/YES key and display “ / b= ”.
Check that the C1 error is not below 220 and ADER is not above
00 every time.
00 every time.
8. Press the ENTER/YES key and display “ / a= ”.
Check that the C1 error is not below 220 and ADER is not above
00 every time.
00 every time.
9. Press the EDIT/NO key, next press the
§ (MD) key, and re-
move the continuously recorded disc.
Note 1: If the C1 error and ADER are above 00 at points a or b, the
focus bias adjustment may not have been carried out prop-
erly. Adjust perform the beginning again.
erly. Adjust perform the beginning again.
5-8. FOCUS BIAS ADJUSTMENT
Adjusting Method:
1. Load a continuously recorded disc (Refer to “5-4. Creating MO
1. Load a continuously recorded disc (Refer to “5-4. Creating MO
Continuously Recorded Disc”.)
2. Turning the MULTI JOG dial and display “CPLAY MODE”.
3. Press the ENTER/YES key twice and display “CPLAY MID”.
3. Press the ENTER/YES key twice and display “CPLAY MID”.
4. Press the EDIT/NO key when “C1=
AD=
” is
displayed.
5. Turning the MULTI JOG dial and display “FBIAS ADJUST”.
6. Press the ENTER/YES key and display “ / a= ”.
6. Press the ENTER/YES key and 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. Turning the MULTI JOG dial in the clockwise direction and
find the focus bias value at which the C1 error rate becomes
220.
220.
8. Press the ENTER/YES key and display “ / b= ”.
9. Turning the MULTI JOG dial in the clockwise direction and
9. Turning the MULTI JOG dial in the clockwise direction and
find the focus bias value at which the C1 error rate becomes
220.
220.
10. Press the ENTER/YES key and display “ / c= ”.
11. Check that the C1 error rate is below 50 and ADER is 00.
11. Check that the C1 error rate is below 50 and ADER is 00.
Then press the ENTER/YES key.
12. If the “( )” in “ - - ( )” is above 20, press the
ENTER/YES key.
If below 20, press the EDIT/NO key and repeat the adjustment
from step 2 again.
If below 20, press the EDIT/NO key and repeat the adjustment
from step 2 again.
13. Press the EDIT/NO key and press the
§ (MD) key to remove
the continuously recorded 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 automatically calculated from points a and b.
figure using the above adjustment. The focal point position
c is automatically calculated from points a and b.
Note 2: As the C1 error rate changes, perform the adjustment using
the average vale.
C1 error
220
b
c
b
Focus bias value
(F. BIAS)
(F. BIAS)
– 24 –
5-11. ADJUSTING POINTS AND CONNECTING POINTS
[BD (MD) BOARD] (Side A)
IC191
D101
IC171
IC121
(TEO)
IC101
RV102
RV101
(VC)
(IOP)
(I+5V)
[BD (MD) BOARD] (Side B)
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