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KCY-70
ADJUSTMENT
PROCEDURES
FOR COMPACT
DISC PLAYER
E-F BALANCE
ADJUSTMENT
PROCEDURE:
802
D0
SV
ON
Be
ot
Connect oscilloscope to the test points TE and Vref.
Press and hold down the SUPER DUBBING button,then press the POWER button.
Press FUNCTION CD button for 4 seconds or more.
(CD section is TEST MODE.)
Put the disc (YEDS-18) in and press PLAY button.
Press the MEMORY button.
(Tracking servo is OFF.)
Adjust VR701 so that the traverse waveform becomes symmetrical above and below.
Press the MEMORY button.
(Tracking servo is ON.)
Press the STOP button.
Turn POWER switch off.
li)
f
Hl
NAAN
& Ht
A=B
Wi |
|
|
Ii
WY)
H
ae
|__4
VOLT/DIV:
0.5V
TIME/DIV:
1ImSEC
FOCUS
BIAS ADJUSTMENT
PROCEDURE:
1.
2. Turn POWER switch on.
3.
4, Adjust VR702 for an optimum waveform eye pattern or so that the peak is maximum.
Connect osilloscope to test points RF anf GND.
Put disc (YEDS-18) in and press PLAY button.
Optimum eye pattern means that shape "<>" can be clearly distinguished at the center
of the waveform.
RF signal waveform
Remarks:
When adjusting, set the oscilloscope AC rang and raise its vertical sensitivity
so that the eye pattern can easily be seen.
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