Sony CX-JDS22 Service Manual page 19

E-F Balance Adjustment
Connection:
BD board
TP (TEO)
TP (VC)
Procedure:
1. Connect an oscilloscpe to test point TP (TEO) and TP (VC)
on the BD board.
2. Set the FUNCTION to "CD".
1)
3. AC is put in pushing N
CD test mode.
4. Put the disc (YEDS-18) in to playback the number five track.
1)
5. Press the N or nN
1) 2)
N or nN
button again. (The tracking servo and the
sledding servo are turned OFF)
6. Check the level B of the oscilliscope's waveform and the A
(DC voltage) of the center of the Traverse waveform.
Confirm the following :
A/B x 100 = less than ±10%
1) JDS22
2) JDS33
Traverse Waveform
0V
1)
7. Press the N or nN
sledding servo are turned ON)
8. 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)
All manuals and user guides at all-guides.com
oscilloscope
+
–
2)
or nN button to enter the
2)
button. If it plays, press the
Center of
the waveform
B
A (DC
voltage)
level: 1.0 ± 0.5 Vp-p
2)
button. (The tracking servo and
C (DC
voltage)
Tracking servo
Sled servo
ON
Checking Location:
– BD BOARD (Side B) –
IC251
TP
(VC)
TP
(TEO)
TP
(FEO)
TP
(RFDCO)
CX-JDS22/JDS33
IC303
IC301
IC101
TP
(RFACO)
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