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E-F Balance Adjustment
Connection:
BD board
TP (TE)
TP (VC)
Procedure:
1.
Connect an oscilloscpe to test point TP (TE) and TP (VC) on
the BD board.
2.
AC is put in pushing
B
3.
Put the disc (YEDS-18) in to playback the number five track.
4.
Press the
B
button. If it plays, press the
(The tracking servo and the sledding servo are turned OFF)
5.
Rotate RV101 on the BD board to adjust A (DC voltage) of
the center of the oscilloscope waveform becomes 0 V.
Traverse Waveform
0V
6.
Press the
button. (The tracking servo and sledding servo
B
are turned ON)
Confirm A (DC voltage) at that tome is 0 V.
7. To exit from this mode, turn the power off.
Notes: • Always move the optical pick-up to most inside track when
exiting from this mode. Otherwise, a disc will not be unloaded.
• Do not run the sled motor excessively, otherwise the gear can
be chipped.
Traverse Waveform
0V
Tracking servo
Sled servo
OFF
Checking Location: BD board (Side B)
Adjustment after CD Base Unit (BU-30CBD64NS) is Re-
placed
Perform the "E-F Balance (1 track jump) check".
oscilloscope
+
–
button to enter the CD test mode.
B
button again.
Center of
the waveform
B
A (DC
voltage)
level: 1.0 ± 0.5 Vp-p
A (DC
voltage)
Tracking servo
Sled servo
ON
Checking Location:
– BD BOARD (Side B) –
RV101
TP2
E-F Balance
(TE)
TP6
Adjustment
(RFDC)
TP8
(RFAC)
TP7
TP4
(VC)
(FE)
IC103
CX-BK2
IC101
25
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