Sony CFD-460 - Page 10

CFD-460 |
Traverse Adjustment
This adjustment is to be done when the optical block is
replaced.
Adjustment Procedure :
oscilloscope
(DC range)
TP (TE)
CD MAIN BOARD { es a
Ce
1. Connect the oscilloscope between TP (TE) and TP
(VREF.)
2. Put the set into service mode.
3. Press the »Pl and Kq@ keys to move the FOP to the
center.
4. Insert disc (YEDS-18) and press P® key.
5. Adjust RV701 so that the oscilloscope traverse waveform
is symmetrical, as shown in the figure below.
6. Release service mode after adjustment is completed.
VOLT/DIV: 1V
TIME /DIV : Ims
Adjustment value: 2+0.5Vp-p
CD MAIN BOARD (CONDUCTOR SIDE)
TP (TE)
TP (RF)
TP (VREF)
Focus Bias Adjustment
This adjustment is to be done when the optical block is
replaced.
Adjustment Procedure :
oscilloscope
(DC range)
CD RF board
LL,
{ TP (RF)
TP (VREF)
1. Connect the oscilloscope between TP (RF) and TP
(VREF).
2. Put the set into service mode.
3. Press the »PI and Kd keys to move the FOP to the
center. (Move the FOP to the music area on the disc to
enable easy visibility of the eye pattern.)
4. Insert disc (YEDS-18) and press » key.
5. Adjust RV702 so that the oscilloscope waveform is as
shown in the figure below (eye pattern).
A good eye pattern means that the diamond scape (©) in
the center of the waveform can be clearly distinguished.
6. Release service mode after adjustment is completed.
e RF signal reference waveform (eye pattern).
VOLT/DIV: 0.2
TIME/DIV : 500ns
WRK
PX
EKER)
a
WY
Vy
|
22%00
7
S55
08:
¢
A]
When observing the eye pattern, set the oscilloscope for AC
range and raise vertical sensitivity.
OV
e@ See page 12 for
Adjustment Location.