Sony CDP-790 - Page 5

| CDP-790
Procedure : ;
high tracking gain
1.
Keep
the
set
horizontal.
high
fandamential
wave
than
for
low
gain
If the set is not horizontal, this adjustment cannot »)
eee due to the gravity against the 2-axis device.
2. Insert disc (YEDS-18) and press > PLAY button.
3. Connect oscilloscope to TP (FEO) and TP (VC) on BD
board.
4. Adjustment RV101 on BD board so that the waveform is
as shown in the figure below. (focus gain adjustment)
VOLT/DIV: 100mV
VOLT/DIV: IV
TIME/DIV : 2mS
— OV
TIME/DIV: 2mS Adjustment Location:
(BD board)
* Incorrent Examples (DC level changes more than on adjust-
ed waveform)
; VOLT/DIV: 100mvV
low focus gain TIME/DIV: 2mS
surat Pale ca Te SAL iy Me BPR
So json
be
VOLT/DIV: 100mV
high focus gain TIME/DIV : 2mS
{Main board)
75mV
aes Component side
5. Connect oscilloscope to TP (TEO) and TP (VC) on BD
board.
6. Adjust RV102 on BD board so that the waveform is as
shown the flgure below. (tracking gain adjustment)
VOLT/DIV: IV
TIME/DIV: 2mS
— OV
* Incorrect Examples (fundamentia wave appears)
low tracking gain
VOLT/DIV: 1V
TIME/DIV : 2mS
— 0V