Traverse (E-F Balance) Adjustment; Traverse Waveform - Sony HCD-MD515 - Component For Dhcmd515 Service Manual

7. TRAVERSE (E-F BALANCE) ADJUSTMENT

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 os-
cilloscope as shown in the following figure so that it
can be seen more clearly.
BD (MD) board
330 k
TP69 (TEO)
TP58 (VC)
Connection:
BD (MD) board
TP69 (TEO)
TP58 (VC)
Adjusting Method:
1. Connect an oscilloscope to TP69 (TEO) and TP58 (VC) of the
BD (MD) board.
2. Load a MO disc (any available on the market) to MD slot 1.
(Refer to note 1.)
3. Press the ) button and move the optical pick-up outside
the pit.
4. Turn the MULTI JOG dial and display "EFBAL ADJUST".
5. Press the ENTER/YES button and display "EFB=
R".
(Laser power READ power/Focus servo ON/tracking servo
OFF/spindle (S) servo ON)
6. Turn the MULTI JOG dial so that the waveforms of the os-
cilloscope becomes the specified value. (When the
MULTI JOG dial is turned , the "
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.
(MO read power traverse adjustment)

(Traverse Waveform)

VC
specification: A=B
7. Press the ENTER/YES button, and save the result of adjust-
ment to the non-volatile memory.
("EFB= SAVE" will be displayed for a moment. Then
"EFB= MO-W" will be displayed.)
oscilloscope
(DC range)
+
–
10 pF
oscilloscope
(DC range)
+
V: 0.1 V/div
–
H: 10 ms/div
MO-
" of "EFB= MO-R"
A
B
8. Turn the MULTI JOG dial so that the waveforms of the os-
cilloscope becomes the specified value. (When the
MULTI JOG dial is turned, the "
changes and the waveform changes.)
In this adjustment, waveform varies at intervals of approx.
2%. Adjust the waveform so that the specified value is satis-
fied as much as possible.
(MO write power traverse adjustment)
(Traverse Waveform)
VC
specification: A=B
9. Press the ENTER/YES button, and save the result of adjust-
ment to the non-volatile memory.
("EFB= SAVE" will be displayed for a moment. Then
"EFB= MO-P" will be displayed.)
10. The optical pick-up moves to the pit area automatically and
servo is imposed.
11. Turn 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. 2%.
Adjust the waveform so that the specified value is satisfied as
much as possible.
(Traverse Waveform)
VC
specification: A=B
12. Press the ENTER/YES button, and save the result of adjust-
ment to the non-volatile memory.
("EFB= SAVE" will be displayed for a moment. Then "EF
MO ADJUST" will be displayed.)
The disc stops rotating automatically.
13. Press the MD6 button and remove the MO disc.
14. Set the test mode again and load the test disc TDYS-1 to MD
slot 1.
15. Turn the MULTI JOG dial and display "EF CD ADJUST"
16. Press the ENTER/YES button and display "EFB=
Servo is imposed automatically.
17. Turn 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. 2%.
Adjust the waveform so that the specified value is satisfied as
much as possible.
(Traverse Waveform)
VC
specification: A=B
18. Press the ENTER/YES button, and save the result of adjust-
ment to the non-volatile memory.
("EFB= SAVE" will be displayed for a moment. Then "EF
CD ADJUST" will be displayed.)
19. Press the MD6 button and remove the test disc TDYS-1.
– 26 –
" of "EFB= MO-W"
A
B
A
B
CD".
A
B