Read Sony HCD-CP11 (serv.man2) Service Manual online
3
3
IC103
TP (RF)
TP (VC)
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.
the signal level is low than specified value with the following
checks.
5.
Check the focus bias check when optical pick-up block is replaced.
Focus Bias Check
Procedure :
1.
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 (
below. (eye pattern)
A good eye pattern means that the diamond shape (
) in the
center of the waveform can be clearly distinguished.
Checking Location:
+
–
–
BD board
TP (RF)
TP (VC)
TP (VC)
oscilloscope
(DC range)
VOLT/DIV: 200 mV
TIME/DIV: 500 ns
TIME/DIV: 500 ns
level:
1.2
1.2
±
0.1 Vp-p
s
– CD BOARD (Conductor Side) –
2.
CD MECHANISM DECK (CDM55D-K5BD41) ADDITION
ELECTRICAL ADJUSTMENT
6
IC101
w;
(SCOR) (CD Play Mode)
Approx.
200 mVp-p
200 mVp-p
• Waveforms
– CD Board –
– CD Board –
1
IC103
qh
(RFO) (CD Play Mode)
2
IC103
qf
(FE) (CD Play Mode)
3
IC103
qd
(TE) (CD Play Mode)
4
IC101
qg
(WFCK)
5
IC101
qj
(XPCK)
7
IC101
yh
(XTAI)
1.2
±
0.1 Vp-p
Approx.
380 mVp-p
380 mVp-p
5.1 Vp-p
136
µ
s
5.9 Vp-p
230 ns
13.2 ms
5 V
3 Vp-p
16.9344 MHz
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