Note : Clear RF signal waveform means that the shape “ ◊ ” can be clearly distinguished at the center of the waveform.
RF signal waveform
VOLT/DIV : 200mV
TIME/DIV : 500ns
level : 1.45 ±
E-F Balance (1 Track jump) Check
oscilloscope
BD board
TP(TEO)
TP(VC)
Procedure :
1.Connect oscilloscope to TP (TEO) and TP (VC).
2.Turned Power switch on.
3.Load a disc
4.Press the gG button. (Becomes the 1 track jump mode.)
5.Confirm that the level B and A (DC voltage) on the oscilloscope waveform.
Adjustment Location:
[BD BOARD] (Conductor Side)
|
| TP |
| TP |
|
|
| (XPCK) | |
|
| (AGCCON) |
| |
12 |
|
|
| |
| 1 | 21 | 20 | |
TP |
| |||
IC103 |
|
| ||
(TEO) |
| 24 |
|
|
|
|
| 1 | |
TP | 40 |
| ||
| IC101 | |||
(FEO) | 41 |
| 80 | |
|
| TP |
|
|
TP |
| (FEI) | 60 | 61 |
(VC) |
|
| ||
|
|
|
| |
| TP |
|
|
|
| (RF) |
| TP |
1 track jump waveform
B
0V
Specified level:
A ⋅±
B
center of waveform
A (DC voltage)
(DGND) |
6. After check, remove the lead wire connected in step 1.
RF PLL Free-run Frequency Check
Procedure :
1. Connect frequency counter to test point (XPCK) with lead wire.
BD board
frequency counter
TP (XPCK)
2.Turned Power switch on.
3.Put the disc
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