Read Sony ZS-Y3L Service Manual online
11
11
ZS-Y3L
Adjustment and Connecting Location:
L4
LW Frequency Coverage Adjustment
L2
FM Frequency Coverage Adjustment
MW Tracking Adjustment
L3-1
CT3
LW Tracking Adjustment
CT5
L3-2
FM Tracking Adjustment
T1 AM IF Adjustment
T2 FM IF Adjustment
L1
CT1
CT1
TP
(VT)
TP
(GND)
TP
(ANT)
– TU Board (Component Side) –
– TU Board (Conductor Side) –
CD SECTION
CD section adjustments are done automatically in this set.
In case of operation check, confirm that focus bias.
In case of operation check, confirm that focus bias.
Focus Bias Check
1. Connect a oscilloscope to TP (RF) and TP (GND) on the CD
board.
2. Insert the disc (YEDS-18). (Part No.: 3-702-101-01)
3. Press the
3. Press the
u
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 (
A good eye pattern means that the diamond shape (
◊) in
thecenter of the waveform can be clearly distinguished.
RF Signal Reference Waveform (Eye Pattern)
Checking Location:
– CD BOARD (Conductor Side) –
VOLT/DIV: 0.2 V (with the 10: 1 probe in use.)
TIME/DIV: 500 ns
TIME/DIV: 500 ns
0.65 to 1.05 Vp-p
When observing the eye pattern, set the oscilloscope
for AC range and raise vertical sensitivity.
for AC range and raise vertical sensitivity.
IC701
TP (GND)
TP
(RF)
Click on the first or last page to see other ZS-Y3L service manuals if exist.