Sony CDP-400 - Page 25

RF PLL Adjustment
servo amp a
1c209
(CLVS)
1.
2.
. Confirm that the oscilloscope waveform is
. Connect oscilloscope or VOM to servo amp board
. Adjust RV202 so that the reading is DC 2.7 V.
. Connect oscilloscope or VOM to audio amp board
9. Adjust RV405 so that the reading is DCO + 1V.
. Connect frequency counter to audio amp board
CDP-400/501/501ES/610ES
CDP-400/501 /S501ES/610ES
Procedure:
oscilloscope or VOM
(OC range) frequency counter
audio amp board
| s@rvo amp board TP? o+——-—_——o
PI
audio are on Oe--’
to servo amp board
R201 (WFCK 1/8)
Put set into adjustment mode. (See page 41)
Fully turn RV101 (GFS) in the direction of the
arrow. (Refer to adjustment location.)
. Put disc (YEDS-1) in and press ® PLAY button.
. Connect oscilloscope to servo amp board test
point TP1.
OH? as
shown in the figure below.
—T
wd
sometimes “L”’ is OK
Confirm the following items when the waveform is
as shown above. If it is not, perform the adjust-
ments in steps 6-16.
A. Connect oscilloscope or VOM to audio amp
board test point TP6 and read the voltage value.
Reading: DCO+1V
B. Connect frequency counter to audio amp board
test point TP7 and read frequency.
Reading: 4.3218MHz + 20kHz
1C203 pin (3) (CLVS).
test point TP6.
test point TP7.
TP6 oscilloscope waveform
ll.
14.
15.
16.
17.
Adjust T401 so that frequency counter reading is
4.3218 MHz + 20 kHz.
. The adjustment of RV40S5 and T401 affect each
other, so repeat steps 8 — 11 two or three times,
finishing with step 11.
. Connect frequency counter to servo amp board
R201 (WFCK !/8). Or, connect osciiloscope or
VOM to servo amp board IC203 pin (5) (CLVS).
Adjust RV202 for the following specification:
Frequency counter: 918 + 10Hz
Oscilloscope or VOM: DC 3.05 40.1 V
Connect oscilloscope to servo amp board test
point TP1.
Confirm that the waveform is like the one shown
in step 5.
If it is not, repeat steps 6 — 16.
After adjustment, return RVIOI to the original
setting.
Adjustment Locations:
— Servo amp board —
RV202
1€203 (6)
terminal
(CLvs)
AVION
iS
1C201 Phase Lock Adjustment
Procedure:
oscilloscope
{DC range}
O
TP3 ae +
1P8 O-—_—_——O -
{ground point}
servo amp board
lL. Put set in adjustment mode. (See page 41)
2. Put disc (YEDS-!) in and press® PLAY button.
3. Connect oscilloscope to servo amp board test
points TP3 and TP8 (ground point).
4. Adjust RV201 so that the waveform is as shown
in the figure below.
10uS or less
Sie
5V
25V
k— 1.08mS—>|
Ov
@ Incorrect Examples
turned too far counterclockwise
25V
i ee | ee |e
turned too far clockwise
SV
2.5V U U
Ov
Adjustment Location: Servo amp board
Rv201
TP8 TP3
AF Offset Adjustment
Procedure:
oscilloscope or VOM
{DC range}
TP9 (R-CH) Om - -
TPS Ls ce cceD be +
1. Turn POWER switch on. (STOP mode)
2. Connect oscilloscope or VOM to audio amp board
test points TP8 (L-CH) and TP9 (R-CH).
3. AF offset voltage must read less than +350mV,
Adjustment Location: Audio amp board
TP9
(R-CH)
TP8
{L-CH)