Sony D-NS313F Service Manual page 8

D-NS313F
[CD SECTION]
The CD section adjustments are done automatically in this set.
Adjusting Procedure:
1. Perform check in the order given.
2. Use YEDS-18 disc (Part No: 3-702-101-01) unless otherwise
indicated.
3. Power supply voltage requirement :DC4.5 V in DC IN jack.
VOLUME button : Minimum
HOLD switch :OFF
Focus bias Check
Condition:
• Hold the set in horizontal state.
Connection:
(SIDE A)
MAIN BOARD
RB802
Q804 Q803
C877
X802
C872
C881
R875 R879
R820
R823
IC801
R829
oscilloscope
(AC range)
TP604(RF)
+
TP005(RF-GND(A))
–
MAIN BOARD
(SIDE A)
T002
CF001
TP002 CF003
(RF(A))
C051
C041
C006
C017
C038
C039
FL001
C025
TP005
(RF GND(A))
R013
R005
R018
C027
R009
C035
D003
C021
8
(J401)
SL801(OPEN)
C813
C811
R408
R401
C401
SL801
FB404
C801
R624
C626
R618
R811 R629
C619
C042 R622
R024
RB903
IC601
R015
TP604
(RF)
R016 C618
C612
Procedure:
1. Make a solder bridge to short SL801 (OPEN) on the MAIN
board side A.
2. Connect the oscilloscope to the test point TP604 (RF) and
TP005 (RF-GND(A)) on the MAIN board side B.
3. Set a disc. (YEDS-18)
4. Press the
u
5. Check the oscilloscope waveform is as shown below.
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 : 500 mV (With the 10 : 1 probe in use)
TIME/DIV : 500ns
To watch the eye pattern, set the oscilloscope to AC range and
increase the vertical sensitivity of the oscilloscope for easy
watch-ing.
6. Stop revolving of the disc motor by pressing the
7. SL801 is opened by taking the solder bridge.
F402
button.
RF level
1.2 ± 0.2 Vp-p
button.
x