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1 track jump waveform
0V
level : 1.3
E-F Balance Check (With general remote commander)
BD board
TP (TE)
TP (VC)
Procedure :
1.
Connect the TP2 (ADJ) on MAIN board to the ground with a
lead wire on main board.
2.
Connect oscilloscpe to test point TP (TE) on BD board.
3.
Turn the Power switch on to set the ADJ mode.
4.
Put disc (YEDS-18) in to play the number five track.
Press the 4 button. (The tracking servo and the sledding servo
5.
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 ± 22%
Traverse waveform
0V
Press the 9 button. (The tracking servo and sledding servo
7.
are turned ON.) Confirm the C (DC voltage) is almost equal to
the A (DC voltage) is step 6.
Traverse waveform
0V
Tracking servo
Sledding servo
OFF
8.
Disconnect the lead wire of TP2 (ADJ) connected in step 1.
Center of the waveform
B
A (DC voltage)
+ 0.7
Vp-p
symmetry
– 0.6
oscilloscope
Center of the waveform
B
A (DC voltage)
level : 1.3 ± 0.6 Vp-p
C (DC
voltage)
Tracking servo
Sledding servo
ON
Adjustment Location :
[ MAIN BOARD ] – Component Side –
TP1
R622
TP2
AFADJ
ADJ
CN621
[ BD BOARD ] – Side A –
TP
(R151)
TP(FE)
TP(TE)
TP(FEI)
TP(RF)
TP(VC)
TP(IOP)
CN102
IC101
11
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