Sony ZS-SN10 Service Manual page 11

Adjustment and Connecting Location:
– TUNER Board (Component Side) –
L4
AM Frequency Coverage Adjustment
L2
FM Frequency Coverage Adjustment
– TUNER Board (Conductor Side) –
TP
(VT)
TP
(GND)
ZS-SN10
T2 FM IF Adjustment
T1 AM IF Adjustment
L1
FM Tracking Adjustment
CT1
CT3
AM Tracking Adjustment
L3
TP
(ANT)
11
CD SECTION
FOCUS BIAS CHECK
1. Connect the oscilloscope to TP (RFACO) and TP (VC) on the
CD board.
2. Insert the disc (PATD-012). (Part No.: 4-225-203-01)
3. Press the button.
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4. Confirm that the oscilloscope waveform is as shown in the
figure below. (eye pattern)
A good eye pattern means that the diamond shape (◊) in the
center of the waveform can be clearly distinguished.
• RF signal reference waveform (eye pattern)
VOLT/DIV: 0.2 V (with the 10: 1 probe in use.)
TIME/DIV: 200 ns
0.5 to 1.1 Vp-p
When observing the eye pattern, set the oscilloscope
for AC range and raise vertical sensitivity.
Checking Location:
– CD Board (Conductor Side) –
IC201
TP
(VC)
TP
(RFACO)
11
ZS-SN10