— 34 —
E-F Balance Check
Procedure:
1. Set the DISC (YEDS-18) in chucking mode.
2. Connect the test point TP (ADJ) of CD board and the ground.
3. Connect oscilloscope to test point TP (TEO).
4. Press DOLBY NR button,
p
button and DISC 1 button at the
same time in the STANDBY mode.
5. Playback the disc and press the DISC 4 button. (Tracking /sled
OFF)
6. Confirm that the oscilloscope waveform is symmetrical on the
top and bottom in relation to 0Vdc, and check this level.
Traverse waveform
oscilloscope
CD board
TP (TEO)
TP (VC)
Specified level: • x 100 = less than ± 7%
• A + B = 250 ± 70 mVp-p
7. Turn the power supply OFF, and remove the read wire connected
in step 2.
A
B
level: 250 ± 70 mVp-p
0V
A – B
2 (A + B)
Focus/Tracking Gain Adjustment (RV102, RV103)
This gain has a margin, so even if it is slightly off.
There is no problem.
Therfore, do not perform this adjustment.
Please note that it should be fixed to mechanical center position when
you moved and do not know original position.
Adjustment Location:
[CD BOARD] (Conductor Side)
RF
FOK
IC103
PCK
IC106
ADJ
www. xiaoyu163. com
QQ 376315150
9
9
2
8
9
4
2
9
8
TEL 13942296513
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
