Sony HCD-D690 / HCD-D990 / HCD-XB6 / HCD-XB600 / LBT-D690 / LBT-XB6 / LBT-XB600 Service Manual ▷ View online
– 37 –
Procedure:
1. Connect oscilloscope to test point TP (RF). (GND terminal :
1. Connect oscilloscope to test point TP (RF). (GND terminal :
VC)
2. Turned Power switch on.
3. Put disc (YEDS-18) in and playback.
4. Confirm that the shape “≈” can be clearly distinguished at the
3. Put disc (YEDS-18) in and playback.
4. Confirm that the shape “≈” can be clearly distinguished at the
center of the waveform and check the RF signal level.
• RF signal
VOLT/DIV: 200 mV
TIME/DIV: 500 ns
TIME/DIV: 500 ns
level:
1.3
1.3
±
0.3 Vp-p
S Curve Check
+
–
BD board
TP (FEO)
TP (VC)
TP (VC)
oscilloscope
Procedure:
1. Connect oscilloscope to test point TP (FEO).
2. Connect between test point TP (FOK) and GND by lead wire.
3. Turn Power switch on.
4. Put disc (YEDS-18) in and turned Power switch on again and
1. Connect oscilloscope to test point TP (FEO).
2. Connect between test point TP (FOK) and GND by lead wire.
3. Turn Power switch on.
4. Put disc (YEDS-18) in and turned Power switch on again and
actuate the focus search. (actuate the focus search when disc
table is moving in and out.)
table is moving in and out.)
5. Check the oscilloscope waveform (S-curve) is symmetrical
between A and B. And confirm peak to peak level within 3±1
Vp-p.
Vp-p.
A
B
symmetry
within 3
±
1 Vp-p
6. After check, remove the lead wire connected in step 2.
Note: • Try to measure several times to make sure than the ratio
Note: • Try to measure several times to make sure than the ratio
of A : B or B : A is more than 10 : 7.
• Take sweep time as long as possible and light up the
brightness to obtain best waveform.
RF Level Check
+
–
–
BD board
TP (RF)
TP (VC)
TP (VC)
oscilloscope
+
–
BD board
TP (FEO)
TP (VC)
TP (VC)
oscilloscope
• RF signal
VOLT/DIV: 200 mV
TIME/DIV: 500 ns
TIME/DIV: 500 ns
level:
1.3
1.3
±
0.3 Vp-p
S-curve waveform
CD SECTION
Note:
1. CD Block is basically designed to operate without adjustment.
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 10M impedance.
4. Clean the object lens by an applicator with neutral detergent
3. Use an oscilloscope with more than 10M impedance.
4. Clean the object lens by an applicator with neutral detergent
when the signal level is low than specified value with the fol-
lowing checks.
lowing checks.
5. Adjust the focus bias adjustment when optical block is replaced.
Focus Bias check
Procedure:
1. Connect oscilloscope to test point TP (RF) on BD board.
2. Turned Power switch on.
3. Put disc (YEDS-18) in and playback.
4. Confirm that oscilloscope waveform is clear and check RF sig-
1. Connect oscilloscope to test point TP (RF) on BD board.
2. Turned Power switch on.
3. Put disc (YEDS-18) in and playback.
4. Confirm that oscilloscope waveform is clear and check RF sig-
nal level is correct or not.
Note:
Clear RF signal waveform means that the shape “≈” can be
clearly distinguished at the center of the waveform.
clearly distinguished at the center of the waveform.
– 38 –
IC103
CNU102
IC101
IC
I02
I02
RF
FOK
VC
FEO
TEO
GND
CNU101
GND
E-F Balance (1 Track Jump) check
(Without remote commander)
(Without remote commander)
Adjustment Location:
[BD BOARD] (Conductor Side)
Procedure:
1. Connect oscilloscope to test point TP (TEO) on BD board.
2. Turned Power switch on.
3. Put disc (YEDS-18) in to play the number five track.
4. Press the “
1. Connect oscilloscope to test point TP (TEO) on BD board.
2. Turned Power switch on.
3. Put disc (YEDS-18) in to play the number five track.
4. Press the “
P (Pause)” button. (Becomes the 1 track jump
mode)
5. Check the level B of the oscilloscope's waveform and the A
(DC voltage) of the center of the Traverse waveform.
Confirm the following:
Confirm the following:
+
–
–
BD board
TP (TEO)
TP (VC)
TP (VC)
oscilloscope
Center of the waveform
B
level : 500 mV
±
100 mVp-p
symmetry
A (DC voltage)
0V
A – B
2 (A + B)
×
100 = ±7 (%)
1 track jump waveform
– 39 –
SECTION 6
DIAGRAMS
•
Circuit Board Location
TRANS board
PANEL board
TCB board
POWERAMP
board
board
TC-B SW board
CD-B1 SW board
CD-B2 SW board
CD-A SW board
LED board
TC-A SW
board
board
HEADPHONE-MIC
board
board
CD MOTOR board
BD LED board
AUDIO board
BD board
LEAF SWITCH
board
board
MOTOR board
DOOR SW board
MAIN board
TABLE SENSOR board
– 40 –
•
Waveforms
— BD Section—
1
IC101
#£
pin (PLAY MODE)
5
IC103
^º
pin (XPCK)
2
IC101
2
pin (FEI) (PLAY MODE)
3
IC101
$¶
pin (TEI) (PLAY MODE)
6
IC103
^™
pin (RFCK)
7
IC103
&¢
pin (WFCK)
!¡
IC301
!£
pin (XT2)
— TUNER Section—
!™
IC1
@¢
pin (XOUT) (EXCEPT AEP, UK,EE,
CIS)
IC21
@¢
pin (X OUT) (AEP, UK,EE, CIS)
4
IC103
@¶
pin (MDP)
8
IC103
*ª
pin (XTAI)
Approx. 1.3 Vp-p
5.6 V
135.5
µ
sec
4.6 Vp-p
31.3
µ
sec
Approx. 0.1 V
7 V
230 nsec
Approx. 0.2 V
10 V
59.8 nsec
9
IC601
!¤
pin (X-OUT)
4.3 V
125 nsec
5.7 V
200 nsec
— PANEL Section—
0
IC301
0
pin (X2)
— MAIN Section—
!£
IC2
@£
pin (VCO) (EXCEPT AEP, UK,EE,
CIS)
IC41
@£
pin (VCO) (AEP, UK,EE, CIS)
•
Abbreviation
EE
EE
: East European model
4.8 Vp-p
2.2 nsec
4.8 Vp-p
222 nsec
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