Sony CDP-C8ESD - Page 9

CDP - C8ESD/C700/C800
The following is a simple adjustment method. 6. Connect oscilloscope to main board TP (TEO).
— Primary Adjustment — 7. Adjust RV104 so that the waveform is as shown in the figure
Note : Since exact adjustment cannot be performed, remem- below. (tracking gain adjustment)
ber the positions of the controls before performing the 8. Turn POWER switch off.
adjustment. If the position after the primary adjust-
ment are only a little different, return the controls to
the original position.
VOLT/DIV: LV
TIME /DIV : 2mS
oscilloscope
(DC range)
main board
LN
TP (FEO) O——7—_—_——_——_O +
H e Incorrect Examples (fundamental wave appears)
! Fas
TP (TEO) O—m- -7
low tracking gain
1. Keep the set horizontal.
If the set is not horizontal, this adjustment cannot =)
Coe due to the gravity against the 2-axis device.
. Put the set into test mode.
Procedure:
OV
VOLT/DIV: 1V
TIME /DIV : 2mS
ov
. Set disc (YEDS-18) and turn POWER switch on.
. Connect oscilloscope to main amp board TP (FEO).
. Adjust RV103 so that the waveform is as shown in the figure
below. (focus gain adjustment)
wv et wh
high tracking gain
higher fundamental wave than for low gain)
VOLT/DIV: IV
VOLT/DIV : 100mV
: ay TIME /DIV : 2mS
TIME /DIV : 2mS
100mv
ov ov
¢Incorrent Examples (DC level changes more than on adjust-
ed waveform)
low focus gain
VOLT/DIV : 100mV
TIME /DIV : 2mS
Adjustment
Location:
main
board
—component
side—
250mV 10401
El
OV
high focus gain
VOLT/DIV : 100mV
TIME /DIV : 2mS
75mV ‘ RV20
8 [vco]
OV
1€201
-o-TES
FEO
S)RV104
T ©
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(C101
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