Electrical Adjustments - Sony CDX-605 Service Manual

Note:
1. Perform adjustments as given.
2. Be sure to use the disc "YEDS-18" parts code: 3-702-101-01, but
only when indicated.
3. Power supply voltage: DC14.4 V (more than 3A).
• FOCUS BIAS CHECK
[RF BOARD] – Conductor Side –
oscilloscope
CNJ12
TP (RF)
TP
(VC)
IC11
Procedure:
1. Connect the oscilloscope to RF board test point RF.
2. Put the set into play mode by loading the disc.
3. Confirm that oscilloscope waveform is clear and check RF
signal level is correct or not.
Note:
Clear RF signal waveform means that the shape "≈" can be clearly distin-
guished at the center of the waveform.
RF signal waveform
SECTION 6

ELECTRICAL ADJUSTMENTS

+
–
VOLT/DIV: 200 mV
TIME/DIV: 500 nsec
level: 1.4 ± 0.3 Vp-p
• TRACKING OFFSET CHECK
[RF BOARD] – Conductor Side –
CNJ12
BP11
(TE)
TP
(VC)
IC11
Procedure:
1. Connect the oscilloscope to RF board bridge point TE.
2. Put the set into play mode by loading the disc.
3. Press the = AMS + button, then, check the traverse wave-
form.
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: This is the tracking error wave form
A
0 V
B
A=B
traverse waveform
(100 track jump waveform)
– 15 –
oscilloscope
+
–
appears when crossing the track.
VOLT/DIV : 500 mV
TIME/DIV : 2 msec
Center : 0 V