Sony CX-LMN5 Service Manual page 25

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E-F Balance Adjustment
Connection:
(CD) button. (The tracking servo and the
Procedure:
1. Connect an oscilloscpe to test point TP (TE) and TP (VC) on
the BD board.
2. AC is put in pushing
mode.
3. Put the disc (YEDS-18) in to playback the number five track.
4. Press the
u
button again. (The tracking servo and the sledding servo are
turned OFF)
5. 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%
Traverse Waveform
0V
6. Press the
u
servo are turned ON)
Rotate RV101 on BD board and adjust the C (DC voltage)
is almost equal to the A (DC voltage) in step 4.
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
Checking Location: BD board (Side B)
oscilloscope
BD board
TP (TE)
+
TP (VC)
–
u (CD) button to enter the CD test
(CD) button. If it plays, press the
B
level: 1.0 ± 0.5 Vp-p
(CD) button. (The tracking servo and sledding
Tracking servo Tracking servo
Sled servo Sled servo
OFF ON
Published in Heiloo, Holland.
Checking Location:
– BD BOARD (Side B) –
(CD)
u
RV101
E-F Balance
Adjustment
IC103
Center of
the waveform
A (DC
voltage)
C (DC
voltage)
IC101
TP2
(TE)
TP6
(RFDC)
TP8
(RFAC)
TP7
TP4
(VC)
(FE)
9/6/15
CX-LMN5
25