Sony HCD-RG55, Руководство по обслуживанию, Страница: 22 / 74

22
HCD-RG55/RG55S
s
Adjustment Location:
RF signal waveform
VOLT/DIV:200mV
TIME/DIV:500ns
level:1.7 0.3Vp-p
IC781
IC751
49
64
1
33
32
48
16 17
33
48
49
17
16
32
64 1
IC731
- CD BOARD (Conductor Side) -
15 14
21 8
22 7
28 1
TP731
1
2
CD SECTION
Note:
1. CD Block is basically designed to operate without adjustment.
Therefore, check each item in order given.
2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.
3. Use an oscilloscope with more than 10 M
Ω impedance.
4. Clean the object lens by an applicator with neutral detergent
when the signal level is low than specified value with the
following checks.
RF Level Check
Procedure:
1. Connect oscilloscope to TP731 pin
2 .
2. Turned Power switch on.
3. Load a disc (YEDS-18) and playback, the number five track.
4. Confirm that oscilloscope waveform is clear and check RF
signal level is correct or not.
Note: Clear RF signal waveform means that the shape “ ” can be
clearly distinguished at the center of the waveform.
Oscilloscope
CD board
TP731 pin
GND
2