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19
CX-JV1
Connecting Location: BD board (Conductor Side)
ADJUSTMENT AFTER CD BASE UNIT (BU-30BD61S) IS
REPLACED
Perform the “E-F Balance (1 track jump) adjustiment”.
+
–
BD board
TP (TE)
TP (VC)
oscilloscope
Traverse Waveform
0V
B
level: 1.0
±
0.5 Vp-p
Center of
the waveform
A (DC
voltage)
Traverse Waveform
0V
Tracking servo
Sled servo
ON
A (DC
voltage)
Tracking servo
Sled servo
OFF
6.
Press the key. (The tracking servo and sledding servo
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.
E-F BALANCE (1 TRACK JUMP) ADJUSTMENT
Connection:
Procedure:
1.
Connect an oscilloscpe to test point TP (TE) and TP (VC) on
the BD board.
2.
AC is put in pushing
key to enter the CD test mode.
3.
Put the disc (YEDS-18) in to playback the number five track.
4.
Press the key. If it plays, press the key again.
(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.
Connecting Location:
– BD BOARD (Conductor Side) –
N
N
N
N
IC101
TP7
(VC)
IC103
RV101
E-F Balance
(1 Track Jump)
Adjustment
TP8
(RFAC)
TP6
(RFDC)
TP4
(FE)
TP2
(TE)
Summary of Contents for CX-JV1
Page 20: ...20 CX JV1 MEMO ...
Page 97: ...9 CX JV1 MEMO ...