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E-F BALANCE (1 TRACK JUMP) 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
N
3.
Put the disc (YEDS-18) in to playback the number five track.
4.
Press the
N
key. 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
key. (The tracking servo and sledding servo
N
are turned ON)
Confirm A (DC voltage) at that tome is 0 V.
7. To release 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
Connecting Location: BD board (Conductor Side)
ADJUSTMENT AFTER CD BASE UNIT (BU-30BD61S) IS
REPLACED
Perform the "E-F Balance (1 track jump) adjustiment".
oscilloscope
+
–
key to enter the CD test mode.
key again.
N
Center of
the waveform
B
A (DC
voltage)
level: 1.0 ± 0.5 Vp-p
A (DC
voltage)
Tracking servo
Sled servo
ON
Connecting Location:
– BD BOARD (Conductor Side) –
RV101
E-F Balance
TP2
(1 Track Jump)
(TE)
TP6
Adjustment
(RFDC)
TP8
(RFAC)
TP7
TP4
(VC)
(FE)
IC103
CX-JV1
IC101
19
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