Sony KSM-213CDP Service Manual page 17

Adjustment Location:
– MAIN board (component side) –
TP (FM IN)
(CONDUCTOR SIDE)
T1 T1
MW
IF
ADJUSTMENT
T2 T2
FM
IF
ADJUSTMENT
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 IC701 pin 4 and pin qa (or
TP (RF) and TP (VREF)).
2. Insert the disc (YEDS-18). (Part No. : 3-702-101-01)
3. Press the NX (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 : 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.
CT5, L3-2
TRACKING
ADJUSTMENT
L3-2
L1 CT1 CT1, L1
FM
TRACKING
ADJUSTMENT
L2
IC1
L2
FM
FREQUENCY
COVERAGE
ADJUSTMENT
) in the
RF level :
0.85 ± 0.2 Vp-p
LW
L3-1
CT5
CT3
L4 L4
LW
FREQUENCY
COVERAGE
ADJUSTMENT
Test Point:
– CD board (conductor side) –
R706
R701
C739
C707
C732
TP
(VREF)
CFD-F10/F10L
TP (VT)
(CONDUCTOR SIDE)
CT3, L3-1
MW
TRACKING
ADJUSTMENT
IC2
TP
(RF)
R711
R710
R713
C731
JW726
C705
C703
C709
R729
C711
17