Cd Section - Sony PHC-Z10 Service Manual

Adjustment Location: main board
[MAIN BOARD] (conductor side)

CD SECTION

CD section adjustments are done automatically in this set.
In case of operation check, confirm that focus bias.
SERVICE NOTE
When the CD block is going to be inspected, be sure to
connect beforehand the jig (J-2501-020-A) between the CD
board (CNP706) and the DISPLAY board (CNP802).
FOCUS BIAS CHECK
1. Connect the oscilloscope between IC701 pin #£ (TP RFO) and
GND on Main board.
2. Insert the disc (YEDS-18). (Part No. : 3-702-101-01)
3. Press the CD ^ 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 : 200 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.
14
TP1
(VT)
L5
AM FREQUENCY
COVERAGE
adjustment
) in the
RF level :
1.3 0.5 Vp-p
CT1
AM TRACKING
adjustment
L3
AM TRACKING
IC1
adjustment
Test Point:
[CD BOARD] (conductor side)
TP (RF0)
R720
IC701