16
HCD-CP300
CD SECTION
Note:
1.
CD Block is basically constructed to operate without
adjustment.
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.
5.
Check the focus bias check when optical block is replaced.
Focus Bias Check
Procedure :
1.
Connect oscilloscope to TP (RF) and TP (VC) on the CD board.
2.
Press the
I/
1
button to turn the power on, and press the
Z
(CD) button to open the CD disc tray.
3.
Put disc (YEDS-18) in and press the
u
(CD) button to play-
back.
4.
Confirm that oscilloscope waveform is as shown in the figure
below. (eye pattern)
A good eye pattern means that the diamond shape (
) in the
center of the waveform can be clearly distinguished.
+
–
BD board
TP (RF)
TP (VC)
oscilloscope
(DC range)
VOLT/DIV: 200 mV
TIME/DIV: 500 ns
level:
1.2
±
0.1 Vp-p
s
Checking Location:
– CD BOARD (Conductor Side) –
16
15
2
1
15
16
30
1
40
41
60 61
80
1
21 20
IC101
IC103
CN102
TP(PF)
TP(VC)
Содержание HCD-CP300
Страница 24: ...24 24 HCD CP300 6 8 SCHEMATIC DIAGRAM MAIN SECTION 1 3 IC B D IC B D 23 See page 37 for IC Block Diagrams ...
Страница 25: ...25 25 HCD CP300 6 9 SCHEMATIC DIAGRAM MAIN SECTION 2 3 ...
Страница 29: ...29 29 HCD CP300 6 13 SCHEMATIC DIAGRAM CONTROL SECTION ...
Страница 31: ...31 31 HCD CP300 6 15 SCHEMATIC DIAGRAM DRIVER SECTION IC B D Page 25 See page 38 for IC Block Diagrams ...
Страница 33: ...33 33 HCD CP300 6 17 SCHEMATIC DIAGRAM POWER SECTION C927 1000 16V AEP UK CND MX Ver 1 1 2001 11 ...