Sony HCD-BX20I / HCD-BX50BTI Service Manual ▷ View online
HCD-BX20i/BX50BTi
HCD-BX20i/BX50BTi
21
21
SECTION 6
DIAGRAMS
6-1. 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 23)
HCD-BX20i/BX50BTi
HCD-BX20i/BX50BTi
22
22
6-2. BLOCK DIAGRAM - iPod, TUNER, BLUETOOTH Section -
ANT901
33 BT CTS
34 BT_RTS
31 BT DOUT
32 BT DIN
32 BT DIN
IC904
BLUETOOTH MODULE
10
A-OUT_P_L
9
A-OUT_N_L
5
A-IN_P_L
4
A-IN_N_L
8
A-OUT_P_R
7
A-OUT_N_R
41
UART_TXD
40
UART_RXD
38
UART_CTS
39
UART_RTS
45 BT_RESET
44 BT_AV_ROLE
12
PIO_00
46
RESET
MIX AMP
IC902
3
A-IN_P_R
2
A-IN_N_R
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
28
TXD_DMPORT
77 CLINK_TX_DOUT
29
RXD_DMPORT
73 NC
DETECT
9
XOUT
11
XIN
X101
20MHz
PATTERN
ANTENNA
(FOR BLUETOOTH)
R-CH
R-CH
LINE AMP
IC901
(BX50BTi)
(BX20i: AEP)
F
BT-L
G
BT OUT-L
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 ST CE
27 ST CLK
25 ST CE
: TUNER (FM/AM)
SIGNAL PATH
R-ch is omitted due to same as L-ch.
: BLUETOOTH IN
: BLUETOOTH OUT
: AUDIO
D104
D102
LINE AMP
IC303
: iPod
(Page 23)
(Page 23)
(Page 23)
(Page 23)
Ver. 1.4
HCD-BX20i/BX50BTi
HCD-BX20i/BX50BTi
23
23
6-3. BLOCK DIAGRAM - MAIN Section -
(BX50BTi)
(BX50BTi)
(BX50BTi)
(BX20i)
(BX20i)
OUTPUT SELECTOR
IC309
A
13
14
12
10
AUDIO IN
R-CH
J301
CD-L
A
BT-L
F
TUNER-L
E
iPod-L
B
PROTECT
J
10
3
1
26
SDA
25
SCL
AMP
DA
TA
24
AMP
CLOCK
22
INH
40
SEL
A
39
TA
LINE MUTE
23
G
BT OUT-L
X1
X0
OUT1
INPUT SELECTOR,
ELECTRICAL VOLUME,
SURROUND/TONE CONTROL
IC304
SYSTEM CONTROLLER
IC301 (3/4)
: AUDIO
: CD PLAY
SIGNAL PATH
R-ch is omitted due to same as L-ch.
: AUDIO IN
: TUNER (FM/AM)
BT
AUDIO OUT
MUTE
43
Q310
D1
5
C1
SEL1
VOL1
B1
A1
X
INPUT SELECTOR
IC312
A
13
14
12
10
X1
X0
Q319
INH
6
Q320
X
11
MUTING
Q103
R-CH
23
MUTING
CONTROL
SWITCH
Q340, 341
(BX50BTi)
(BX50BTi)
POWER AMP
IC601
11 CH1 IN
10
MONIT
OR
CH1 OUT+ 4
CH1 OUT– 5
CH1 OUT– 5
13
STBY
J500
R-CH
PHONES
SPEAKER
+
–
–
–
+
R
L
J302
DC
DETECT
Q342 – 344
POWER
MONITOR
Q345
M901
(FAN)
+9V
M
M
AC DET
K
D313
STK-ON
53
FAN MOTOR
DRIVE
Q316, 317
FAN MOTOR
DETECT
Q307, 347, 348
: iPod
7
(Page 21)
(Page 22)
(Page 22)
(Page 22)
(Page 22)
(Page 24)
(Page 24)
HCD-BX20i/BX50BTi
HCD-BX20i/BX50BTi
24
24
6-4. BLOCK DIAGRAM - PANEL, POWER SUPPLY Section -
SIRCS
4
SYSTEM CONTROLLER
IC301 (4/4)
(AC IN)
SUB POWER
TRANSFORMER
T902
RY901
MAIN POWER
TRANSFORMER
T901
RECT
D911 – 914
D923
D922
D330
D920
PROTECT
D332
D322
D318, 321
D303
AMP B+
F901
F902
TO
POWER AMP
AMP B–
+9V
REGULATOR
IC305
REGULATOR
Q304 - 306
UNREG SUB
UNREG SUB
SYS +3.3V
+9V
RECT
D907, 908
EVER +3.3V
RESET SIGNAL
GENERATOR
IC310
RELAY
DRIVE
Q315
LINE
FILTER
LF901
TUNER, BT +9V
5
STBY-RELAY
20
AC CUT
66
I-POWER MONITOR
12
RESET
REMOTE CONTROL
RECEIVER
IC901
X301
32.768kHz
11
10
XCOUT
INOUT
13
15
X302
5MHz
XOUT
XIN
BLUETOOTH OPR
S801 – 807,
S809 – 821
(FRONT PANEL KEYS)
KEY1 – KEY3
RESET
SWITCH
Q309
AC DETECT
Q301
B+ SWITCH
Q312, 313
VM +7V
RECT
D924 – 927
+5V
REGULATOR
IC306
VBUS POWER
ON/OFF SWITCH
IC201
VBUS +5V
BT +3.3V
+3.3V
REGULATOR
IC903
IP +3.3V
+3.3V
REGULATOR
IC102
CD +1.5V
+1.5V
REGULATOR
IC201
KEY WAKE UP
74
D774
D903
(BX50BTi)
LED DRIVE
Q902
STANDBY
D902
STANDBY LED
89
LED DRIVE
Q901
(BX50BTi)
57
CD ON
94
X5V FLAG
80
DMPORT POWER
AVDD +3.3V
DVDD +3.3V
+3.3V
REGULATOR
Q302, 303,
Q390, 392
RECT
D916 – 919
AC DET
K
PROTECT
J
+9V +4V
VOLTAGE
DETECT
Q393
PROTECT
DETECT
Q333, 338
VFL
FL901
FLUORESCENT
INDICATOR TUBE
T801
DC/DC
CONVERTER
RECT
D904, 905
OSC
Q903
GRID DRIVE
Q905
90
91
93
92
91
93
92
57
P1
FL RESET
FL CS
FL SCLK
FL SD
FL SCLK
FL SD
RSTB
CSB
CLKB
DIN
GR1
AD2, AD1 SG5 – SG35,
SG1 – SG4
GR2 – GR11
FLUORESCENT
INDICATOR TUBE DRIVER
IC902
+9V
52
32
53
54
55
54
55
1 – 31, 61 – 64
33 – 42
59, 60
81 – 83
+9V
REGULATOR
IC307
(BX20i: SP)
(EXCEPT BX20i: SP)
VOLTAGE
SELECTOR
S901
Abbreviation
: Singapore model
SP
(Page 23)
(Page 23)
Ver. 1.1
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