Sony CDP-400 - Page 24

| CDP-400/501/501ES/610ES
CDP-400/501/501ES/610ES |
Focus Offset Adjustment
Procedure: Adjustment Location: Audio amp board
RV101 (GFS) C)
TPI RV406
audio amp board
TP1 Que - =,
TP4
(ground point}
1. Put set in adjustment mode. (See page 4!)
2. Fully turn RV101 (GFS) in the direction of the
arrow. (See above)
3. Connect oscilloscope to audio amp board test
points TP] and TP4 (ground point).
4. Adjust RV406 tentatively so that oscilloscope
treading is DC 0 V.
5. Put disc (YEDS-!) in and press ® PLAY button.
6. Connect oscilloscope to audio amp board test
points TP3 and TP4 (ground point).
7. Adjust RV406 for an optimum waveform eye
pattern or so that the peak is maximum. Opti-
mum eye pattern means that, the shape ‘O” can be
clearly distinguished at the center of the wave-
form.
RF signal waveform
YY; O09,
AW ii
AAA
33V
LBV
8. After adjustment, return RV101 to the original
setting.
Tracking Balance Adjustment
Procedure:
TPIZ TP6 (TE) 7P8 {GND}
RV101 (GFS)
oscillascope
{AC range) a
audio amp board C)
TP2 oF 0 +
TP4 o-——_0-
(ground point}
Note: Set the sweep time longer
for easy waveform checking,
servo amp board
ee A
ov 10-20 OV
B Vp-p B
A=8 A=-B
1. Put set in adjustment mode. (See page 41)
2. Ground servo amp board test point TP13.
Adjustment Location: Audio amp board
3. Fully turn RVIOI (GFS) in the direction of the
arrow. (See above)
4. Put disc (YEDS-]} in and press ® PLAY button.
5. Connect oscilloscope to audio amp board test
points TP? and TP4 (ground point).
6. Adjust RV4Q1 so that the oscilloscope waveform
is symmetrical above and below, relative to OV.
~I
grounded audio amp board test point TP13,
Return RV101 to the origina! setting.
. After adjustment, remove the lead wire which
7P4 (GND) TP2
RV401
i part d :
CS
iN
2
-
rm
—44- z