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