Sony HCD-D890AV / HCD-XB55AV / HCD-XB80AV / HCD-XB88AV / LBT-D890AV / LBT-XB55AV / LBT-XB80AV Service Manual ▷ View online
– 17 –
CD SECTION
Note:
1. CD Block is basically constructed 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
3. Use an oscilloscope with more than 10M
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.
checks.
S Curve Check
Procedure :
1. Connect oscilloscope to test point TP (FEO).
2. Connect between test point TP (FOK) and Ground 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 Ground 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 be-
tween A and B. And confirm peak to peak level within 3 ± 1Vp-p.
S-curve waveform
6. After check, remove the lead wire connected in step 2.
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 bright-
ness to obtain best waveform.
RF Level 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.
RF signal waveform
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 “P (Pause)” button.
5. Check the level B of the oscilloscope's waveform and the A (DC
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.
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:
• A/B x 100 = less then ± 7 (%)
• B = 500 ± 100 mVp-p
• B = 500 ± 100 mVp-p
1 track jump waveform
Adjustment Location:
[BD BOARD] (Conductor Side)
E-F Balance (1 Track Jump) check
oscilloscope
BD board
TP (FEO)
TP (VC)
TP (VC)
symmetry
A
B
Within 3
±
1 Vp-p
oscilloscope
BD board
TP (RF)
TP (VC)
TP (VC)
VOLT/DIV : 200mV
TIME/DIV : 500ns
TIME/DIV : 500ns
level : 1.3
±
0.3 Vp-p
oscilloscope
BD board
TP (TEO)
TP (VC)
TP (VC)
0V
Center of the waveform
B
Symmetry
A (DC voitage)
level : 500 mV
±
100 mVp-p
TP (RF)
TP
(FOK)
(FOK)
IC101
TP
(VC)
TP
(GND)
(GND)
TP
(TEO)
TP
(FEO)
(FEO)
IC103
IC102
IC102
CN101
– 18 –
SECTION 6
DIAGRAMS
Note:
pA is including in AUDIO board.
6-1. CIRCUIT BOARDS LOCATION
p
A
MOTOR board
LEAF SWITCH board
BD board
LED board
CD MOTOR board
TABLE SENSOR board
AUDIO board
(including
p
A)
TRANS board
ENCAPSULATED COMPONENT(D890AV/XB55AV/XB88AV)
TCB board(XB80AV)
TCB board(XB80AV)
SURROUND board
MAIN board
POWER board
CD-B1 SW board
CD-B2 SW board
TC-B SW board
TC-A SW board
HP/MIC board
PANEL board
DOOR SW board
CD-A SW board
CD-LED board
– 19 –
– 20 –
6-2. BLOCK DIAGRAMS
– TUNER SECTION – (AEP, UK model)
HCD-D890AV/XB55AV/XB80AV/XB88AV
TM1
AM
ANTENNA
FM 75
Ω
COAXIAL
ANT IN
ST +10V
Q5
VT
FE1
FM FRONT END
IF OUT
CF1
10.7MHz
IF AMP
Q1, 2
CF2
10.7MHz
IF AMP
Q3, 4
CF3
10.7MHz
1 FM IN
REG
FM/AM MPX
IC41
17
10
09
PLL
IC21
11
FM
TUNED
LEVEL
15 13
30
14
RV42
2 12
14
7
10
X42
450kHz
D41
FM SD
ADJ
OSC.BUFF
AM/FM
VCO STOP
IF BUFF
MUTE
AM
SD
AM
TUNED
LEVEL
12
RV41
2
AM IF
IFT41
4
9
AM IF
DET
STEREO
TUNED
7
6
X41
10.7MHz
MUTE
STEREO
TUNED
23
22
FM DET OUT
MPX IN
21
20
OUT L
OUT R
LPF
RCH
19 AMP IN L
AMP
OUT
L
17
ST L
4
5
5
3
ST-CE
COM-DIN
COM-CLK
COM-DATA
A
MAIN
SECTION
CE
DI
CL
DO
1 24
X21
4.5MHz
AM MIX
AM
SD
6
28
5
2
15
17
16
14
12
13
29
26 25 24 23
22
21 20
9
LW SW
Q9
27
FE2
MW/LW FRONTEND
Q11
MW
SW
MW
SW
Q12
MW
SW
MW
SW
Q14
LW SW
Q13
MW
SW
MW
SW
AM OSC
AM RF IN
FM AFC
• R CH: Same as L ch
• SIGNAL PATH
: FM
: MW
• SIGNAL PATH
: FM
: MW
RDS DATA
RDS INT
(Page 27)
6
FM
VT1
MW
MW
AM OSC
FM
VCO STOP
FM/AM IF
XIN
XOUT
3
4
13
14
2
16
IC1751
RDS DECODER
IC1752
X1751
4.332MHz
5
7
FM
ADJ
26
24
AM
DET
OUT
– 21 –
– 22 –
– TUNER SECTION – (East European, CIS model)
HCD-D890AV/XB55AV/XB80AV/XB88AV
22 MPX IN
21
OUT L
LPF
19
AMP
IN
L
AMP
OUT
L
17
4
5
5
3
6
ST-CE
COM-DIN
COM-CLK
COM-CLK
COM-DATA
A
MAIN
SECTION
CE
DI
CL
CL
DO
• R CH: Same as L ch
• SIGNAL PATH
: FM
: MW
• SIGNAL PATH
: FM
: MW
D42
D43
13
FM LOW
SUB CARRIER
PEAK
L1701
CT1701
TP1701
2
3
20
RV1701
SUB CARRIER
LEVEL
7
6
9
10
POLAR
DECODER
IC1701
IN
POUT
L OUT
R OUT
SUB IN
MON
VCO
ST IND
VCO
STOP
18
17
R CH
13
12
POLAR/PILOT
SWITCH
IC1702
14
9 11
L IN
L OUT
C
A
R OUT 4
R CH
SWITCH
Q1701
SWITCH
Q1702
SWITCH
Q1703
D1704
D1703
D1701
D1702
ST-L
STEREO
TUNED
TUNED
MUTE
TP1702
RV1702
VCO
(Page 27)
TM1
AM
ANTENNA
FM 75
Ω
COAXIAL
ANT IN
ST +10V
Q5
VT
FE1
FM FRONT END
IF OUT
CF1
10.7MHz
IF AMP
Q1-4
CF3
10.7MHz
1 FM IN
REG
FM/AM MPX
IC41
17
10
09
PLL
IC21
11
FM
TUNED
LEVEL
15 13
30
14
RV42
2 12
14
7
8
10
X42
450kHz
D41
AM/FM
VCO STOP
IF BUFF
MUTE
AM
SD
AM
TUNED
LEVEL
12
RV41
2
AM IF
IFT41
IFT41
4
9
AM IF
FM
DET
DET
STEREO
TUNED
7
6
X41
10.7MHz
1 24
X21
4.5MHz
AM MIX
AM
SD
6
28
5
2
15
17
16
14
12
13
29
26 25 24 23
22
21 20
9
LW SW
Q9
27
FE2
MW/LW FRONTEND
Q11
MW
SW
MW
SW
Q12
MW
SW
MW
SW
Q14
LW SW
Q13
MW
SW
MW
SW
AM OSC
AM RF IN
FM
VT1
MW
MW
AM OSC
FM
VCO STOP
FM/AM IF
IF REQ
XIN
XOUT
3
OUT R
RCH
20
ADJ
FM SD
ADJ
OSC.BUFF
FM AFC
26
23
FM DET OUT
24
AM
DET
OUT
POLA
L IN
L IN
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