Sony HCD-BX77DBI Service Manual ▷ View online
HCD-BX77DBi
13
CD SERVICE MODE
This mode can run the CD sled motor freely. Use this mode, for
This mode can run the CD sled motor freely. Use this mode, for
instance, when cleaning the optical pick-up.
Procedure:
1. Press the [
1. Press the [
?/1
] button to turn the power on.
2. Press the [FUNCTION] button to select “CD”.
3. Press three buttons of [
3. Press three buttons of [
x
/CANCEL], [VOL –] and [
A
]
simultaneously, the message “SERVICE MO” is displayed on
the fl uorescent indicator tube.
the fl uorescent indicator tube.
4. Press the [
l
m
TUNE –] button to move the optical pick-
up to inside track and the message “SLED IN” is displayed on
the fl uorescent indicator tube, or press the [
the fl uorescent indicator tube, or press the [
M
L
TUNE
+] button to outside track and the message “SLED OUT” is
displayed on the fl uorescent indicator tube.
displayed on the fl uorescent indicator tube.
5. Press
the
[CD
u
] button, “LD ON” or “LD OFF” is displayed
on the fl uorescent indicator tube. Each time [CD
u
] button is
pressed, laser diode on/off is changed over.
6. To release this mode, press the [
?/1
] button.
HCD-BX77DBi
14
TUNER SECTION
FM TUNE LEVEL CHECK
signal
generator
set
Procedure:
1. Turn on the set.
2. Input the following signal from signal generator to FM antenna input
2. Input the following signal from signal generator to FM antenna input
directly.
Carrier frequency
: A = 87.5 MHz, B = 98 MHz, C = 108 MHz
Deviation
: 75 kHz
Modulation
: 1 kHz
ANT input
: 35 dBu (EMF)
Note: Use 75 ohm coaxial cable to connect signal generator and the set.
You cannot use video cable for checking.
Use signal generator whose output impedance is 75 ohm.
3. Set to FM tuner function and tune A, B and C signals.
4. Confi rm “TUNED” is lit on the display for A, B and C signals.
4. Confi rm “TUNED” is lit on the display for A, B and C signals.
When the selected station signal is received in good condition, “TUNED”
is displayed.
is displayed.
SECTION 4
ELECTRICAL CHECKS
CD SECTION
Note:
1. CD Block is basically constructed to operate without adjust-
ment.
2. Use YEDS-18 disc (Part No. 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 specifi ed value with the fol-
lowing checks.
lowing checks.
5. Check the focus bias check when optical pick-up block is re-
placed.
FOCUS BIAS CHECK
+
–
–
CD board
TP121 (RFI)
TP124 (VC)
oscilloscope
(DC range)
Procedure:
1. Connect oscilloscope to TP121 (RFI) and TP124 (VC) on the
1. Connect oscilloscope to TP121 (RFI) and TP124 (VC) on the
CD board.
2. Press the [
?/1
] button to turn the power on.
3. Set disc (YEDS-18) on the disc tray and press the [CD
u
]
button to playback.
4. Confi rm that oscilloscope waveform is as shown in the fi gure
below. (eye pattern)
A good eye pattern means that the diamond shape (◊) in the
center of the waveform can be clearly distinguished.
center of the waveform can be clearly distinguished.
VOLT/DIV: 200 mV
TIME/DIV: 500 ns
level:
1.2 ± 0.3 Vp-p
Checking Location:
\
TP124
(VC)
– CD Board (Conductor Side) –
TP121
(RFI)
IC101
HCD-BX77DBi
HCD-BX77DBi
15
15
SECTION 5
DIAGRAMS
5-1. BLOCK DIAGRAM - CD SERVO Section -
SYSTEM CONTROLLER
IC301 (1/4)
CD-MP3 PROCESSOR
IC101
MUTE
2-AXIS
DEVICE
(TRACKING)
(FOCUS)
95
89
A
AVDD
+3.3V
+3.3V
DETECTOR
FNi1 (A)
RFo
97 FPi1 (B)
88
2
AGCi
3
RFRP
RFZI
7
6
TEi
TEZi
83
RFEQo
81 RFi
82 RFRPi
82 RFRPi
30
LO
27
RO
38
BUS0
R-CH
94 FNi2 (C)
96 FPi2 (D)
100 TNi (E)
98 TPi (F)
91 LDo
92
MDi
2 VO1+
1 VO1–
13 DMo
AUTOMATIC
POWER CONTROL
Q301
LD
PD
LASER DIODE
OPTICAL PICK-UP
BLOCK
(KSM-213DCP)
B
C
D
E
F
12 FMo
10 TRO
9 FMO
20 IO0 (/HSO)
I-V AMP
M401
(SPINDLE)
M402
(SLED)
12 VO2–
11 VO2+
18 VO3+
17 VO3–
26 VO4+
27
7
IN4’ 24
IN3’ 20
IN2’ 9
IN1 3
BIAS 23
84 VRo
VO4–
M
M
FOCUS/TRACKING COIL DRIVE,
SLED/SPINDLE MOTOR DRIVE
IC401
S201
(LIMIT)
DVDD
+3.3V
24
XO
23
XI
X102
16.9344MHz
60 CD DRIVER MUTE
LOADING
MOTOR DRIVE
IC311
CDM LOAD IN 85
CDM LOAD OUT
CDM SW (OPEN)
CDM SW (CLOSE)
84
88
87
M
A
CD-L
: CD PLAY
SIGNAL PATH
R-ch is omitted due to same as L-ch.
VCC
A
B
C
D
E
F
LD
PD
SP+
VC
SP–
SL+
SL–
T+
T–
F+
F–
3 CD BUS0
39
BUS1
2 CD BUS1
40
BUS2 (SO)
1 CD BUS2
70 CD CLK
41
BUS3 (SI)
100 CD BUS3
42
BUCK (CLK)
69 CD CCE
43
XCCE
54
SBSY
48
PIO0
68 MP3 IREQ
19 SBSY
37
XRST
59 CD RESET
S001
DISC TRAY
OPEN/CLOSE DETECT
OPEN
CLOSE
M001
(LOADING)
(Page 17)
HCD-BX77DBi
HCD-BX77DBi
16
16
5-2. BLOCK DIAGRAM - iPod, TUNER, DAB Section -
37 AUDIO_MUTE
iPod INTERFACE
IC101
78 CLINK_RX_DIN
SYSTEM CONTROLLER
IC301 (2/4)
CN102
(iPod)
27
28
18
L-CH
R-CH
LINE-OUT-L
LINE-OUT-R
24 TXD_iPod
RXD
19
23 RXD_iPod
TXD
30
46
DGND
8
8 RESET
VBUS +5V
VBUS
B
iPod-L
MUTING
CONTROL
SWITCH
Q106
RESET SIGNAL
GENERATOR
IC103
MUTING
Q103, 105
E
TUNER-L
F
DAB-L
28
TXD_DMPORT
77 CLINK_TX_DOUT
29
RXD_DMPORT
73 NC
DETECT
9
XOUT
11
XIN
X101
20MHz
TUNER (FM/AM)
AM
FM ANT
AM ANT
L OUT
R OUT
DO/STEREO
R-CH
ST DIN
ST CLK
ST CE
FM 75
:
COAXIAL
ANTENNA
26 DATA IN/STEREO
TUNED
6 TUNER TUNED
RDS CLK
18 RDS INT
RDS DATA
7 RDS DATA
28 ST DATA OUT
27 ST CLK
25
27 ST CLK
25
DAB TUNER MODULE
AUDL
AUDR
S1_DIN
R-CH
S1_DOUT
ANTENNA
DAB 75
DAB 75
:
47
48
48
ST CE
DAB TXD
DAB RXD
DAB RXD
: TUNER (FM/AM)
SIGNAL PATH
R-ch is omitted due to same as L-ch.
: DAB
D104
D102
LINE AMP
IC303
: iPod
LINE AMP
IC803
(Page 17)
(Page 17)
(Page 17)
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