8
D-FJ211
RF Level Check
Condition:
• Hold the set in horizontal state.
Connection:
Procedure:
1. Connect the oscilloscope to the test point TJ601(RF) on the
MAIN board.
2. Set a disc. (YEDS-18)
3. Press the
u
button.
4. Check the oscilloscope waveform is as shown below.
A good eye pattern means that the diamond shape (
◊
) in the cen-
ter of the waveform can be clearly distinguished.
RF Signal reference Waveform (Eye Pattern)
To watch the eye pattern, set the oscilloscope to AC range and
increase the vertical sensitivity of the oscilloscope for easy
watch-ing.
5. Stop revolving of the disc motor by pressing the
x
button.
The CD section adjustments are done automatically in this set.
Precautions for Check
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.
(J401)
VOLUME button : Minimum
HOLD switch : OFF
RF level
0.45 to 0.75 Vp-p
VOLT/DIV : 100 mV (With the 10 : 1 probe in use)
TIME/DIV : 500n
s
FL2
1
25
26
1
C624
R616
C633
C618
C605
C609
C612
C613
C608
C607
C614
R615
R612
R613
0
5
R601
C810
C604
C9
C325
R614
C632
C619
R2
VDR302
VDR305
D306
TJ305
A A
D
TJ307
TJ3
TJ5
TJ410
(A GND)
TJ605
TJ606
TJ608
TJ801
TJ611
TJ614
TJ10
TJ802
L606
C44
TAP1
FB
FB301
FB101
R306
L602
TJ303
X601
IC601
TJ601
(RF)
C606
D3
TJ601(RF)
TJ401(A GND)
oscilloscope
(AC range)
[MAIN BOARD]
(Side A)
CD SECTION
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