Read Sony BMZ-K33 / CX-BK33 Service Manual online
30
CX-BK33
+
–
–
BD board
TP (TE)
TP (VC)
oscilloscope
E-F BALANCE 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
N
button to enter the CD test mode.
3. Put the disc (YEDS-18) in to playback the number five track.
4. Press the
4. Press the
N
button. If it plays, press the
N
button again. B
(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.
6. Press the
N
button. (The tracking servo and sledding servo
are turned ON)
Confirm A (DC voltage) at that tome is 0 V.
7. To exit from this mode, turn the power off.
Note:
•
Always move the optical pick-up to most inside track when exiting
from this mode. Otherwise, a disc will not be unloaded.
from this mode. Otherwise, a disc will not be unloaded.
•
Do not run the sled motor excessively, otherwise the gear can be
chipped.
chipped.
Checking Location: BD board (Side B)
ADJUSTMENT AFTER CD BASE UNIT (BU-30CBD64NS)
IS REPLACED
IS REPLACED
Perform the “E-F Balance (1 track jump) check”.
Traverse Waveform
0V
B
level: 1.0
±
0.5 Vp-p
Center of
the waveform
the waveform
A (DC
voltage)
Traverse Waveform
0V
Tracking servo
Sled servo
ON
A (DC
voltage)
voltage)
Tracking servo
Sled servo
OFF
– BD BOARD (Side B) –
IC101
TP7
(VC)
(VC)
IC103
RV101
E-F Balance
Adjustment
E-F Balance
Adjustment
TP8
(RFAC)
(RFAC)
TP6
(RFDC)
(RFDC)
TP4
(FE)
(FE)
TP2
(TE)
(TE)
Checking Location:
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