Read Sony CDX-T70MXDC Service Manual online
CDX-T70MXDC/MP3 CDC 6
15
15
CDX-T70MXDC/MP3 CDC 6
TRACKING OFFSET CHECK
Connection:
– RF Board (Component Side) –
Procedure:
1. Connect the oscilloscope to TP (TE) and TP (VC) on the RF
board.
2. Put the set into play mode by loading the disc (YEDS-18).
3. Press the [ AMS ] button on the master unit, and check
3. Press the [ AMS ] button on the master unit, and check
the traverse waveform*.
4. Confirm that the oscilloscope waveform is symmetrical on the
top and bottom in relation to 0 V dc, and check this level.
* Traverse waveform:
* Traverse waveform:
This is the tracking error wave form
appears when crossing the track.
. >
oscilloscope
(DC range)
+
–
–
TP (TE)
TP (VC)
IC101
A
B
0 V
A=B
traverse waveform
(100 track jump waveform)
(100 track jump waveform)
VOLT/DIV: 500 mV
TIME/DIV: 2 ms
Center: 0 V
TIME/DIV: 2 ms
Center: 0 V
Traverse waveform
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