Sony HCD-CP500MD Service Manual page 33

9. Press the ENTER/YES "R"
P".
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
button.
> "R"
Traverse Waveform
VC
Specified value : Below 10% offset value
I A – B I
Offset value (%) =
2 (A + B)
11. Press the
ENTER/YES "R"
(C14).
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 . "R" or > "R"
CHECK" (C15).
15. Press the ENTER/YES "R"
Servo is imposed automatically.
16. Observe the waveform of the oscilloscope, and check that the
specified value is satisfied. Do not press the
> "R" button.
Traverse Waveform
VC
Specified value : Below 10% offset value
I A – B I
Offset value (%) =
2 (A + B)
17. Press the
ENTER/YES "R"
(C15).
18. Press the Z (MD) button and take out the check disc (TDYS-1).
Checking Location: BD (MD) board (see page 38)
button to display "EFB =
. "R"
A
B
X 100
button to display "EF MO CHECK"
button and display "EF CD
button to display "EFB =
. "R"
A
B
X 100
button to display "EF CD CHECK"
6-7. Focus Bias Check
MO-
Change the focus bias and check the focus tolerance amount.
Procedure:
1. Load the test disc (MDW-74/GA-1).
2. Press the . "R"
or (C34).
3. Press the
ENTER/YES "R"
4. Press the
MENU/NO "R"
displayed.
5. Press the
. "R"
CHECK" (C16).
6. Press the
ENTER/YES "R"
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 below 2.
7. Press the
ENTER/YES "R"
Check that the C1 error is about 200 and ADER is below 2.
8. Press the
ENTER/YES "R"
Check that the C1 error is about 200 and ADER is below 2.
9. Press the
MENU/NO "R"
and take out the test disc.
6-8. C PLAY Check
CD".
MO Error Rate Check
Procedure:
1. Load the test disc (MDW-74/GA-1).
or
2. Press the . "R"
(C34).
3. Press the ENTER/YES "R"
4. The display changes to "C =
5. If the C1 error rate is below 50, check that ADER is 00.
6. Press the
MENU/NO "R"
Z (MD) button and take out the test disc.
CD Error Rate Check
Procedure:
1. Load the check disc (TDYS-1).
2. Press the . "R"
(C34).
3. Press the
ENTER/YES "R"
4. The display changes to "C =
5. Check that the C1 error rate is below 50.
6. Press the MENU/NO "R"
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.
Procedure:
1. Load a recordable disc (blank disc).
2. Press the
. "R"
1MODE" (C35).
3. Press the
ENTER/YES "R"
4. When recording starts, "REC" and "CREC 1 (@@@@)"
(@@@@ is the address) are displayed.
5. About 1 minute later, press the
continuous recording.
6. Press the
. "R"
MODE" (C34).
7. Press the
ENTER/YES "R"
8. "C = AD =
9. Check that the C1 error becomes below 50 and the AD error
below 2.
10. Press the
MENU/NO "R"
Z (MD) button and take out the disc.
HCD-CP500K/CP500MD
or > "R" button to display "CPLAY 1MODE"
button to display "CPLAY 1MID".
button when "C =
or button to display "FBIAS
> "R"
button to display "
button to display "
button to display "
button, then press the Z (MD) button
or > "R" button to display "CPLAY 1MODE"
button to display "CPLAY 1MID".
AD = )".
button to stop playback, then press the
or > "R" button to display "CPLAY 1MODE"
button to display "CPLAY 1MID".
AD = )".
button to stop playback, then press the
or button to display "CREC
> "R"
button to display "CREC 1MID".
MENU/NO "R"
or button to display "CPLAY 1
> "R"
button to display "CPLAY 1MID".
)" will be displayed.
button to stop playback, then press the
AD = )" is
/ c = ".
/ b = ".
/ a = ".
button to stop
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