Electrical Adjustment - Aiwa CX-LZP5 Service Manual

CX-LXP5
CD SECTION
CD section adjustments are done automatically in this set.
In case of operation check, confirm that focus bias.
FOCUS BIAS CHECK
1. Connect the oscilloscope between IC101 pin ra and pin wg (or
TP124 (RFACO) and TP177 (VC)).
2. Insert the disc (YEDS-18). (Part No. : 3-702-101-01)
3. Press the CD N button.
4. Confirm that the oscilloscope waveform is as shown in the
figure below. (eye pattern)
A good eye pattern means that the diamond shape (
center of the waveform can be clearly distinguished.
• RF signal reference waveform (eye pattern)
VOLT/DIV : 50 mV (10 : 1 probe in use)
TIME/DIV : 500 nS
When observing the eye pattern, set the oscilloscope for AC range
and raise vertical sensitivity.
20
SECTION 5
ELECTRICAL ADJUSTMENTS
) in the
RF level :
0.8 ± 0.2 Vp-p
Test Point:
– CD BOARD (SIDE B) –
TP177
(VC)
TP124
(RFACO)
IC101