Sony HCD-BX20I / HCD-BX50BTI Service Manual ▷ View online
HCD-BX20i/BX50BTi
HCD-BX20i/BX50BTi
37
37
6-16. SCHEMATIC DIAGRAM - HEADPHONE/AMP Section -
CN320
C525
R543
C529
R542
R544
C526
R510
R512
R509
C523
R508
C506
R546
C503
R503
C524
R504
R507
R513
R515
R545
C527
C528
R514
C519
C501 C505
C504
R505
C502
R502
C511
R521
C512
R506
CN308
R516
R517
R518
R519
IC601
CN317
R133
R233
C131
C231
R232
R132
R537
R538
R539
R540
R587
R588
R589
R590
R583
R582
R581
R533
R532
R531
J301
R541
R524
R523
R536
R535
R534
R586
R585
R584
C531 C581
R522
R501
J500
5P
0.0022
470k
100
35V
35V
100
470k
0.0022
2.2k
1k
47k
10p
C515
EP501
0.1
C518
(BX20i: AEP)
0.1
1k
47
25V
0
47
25V
1k
10p
47k
2.2k
1k
0
10k
2200p
2200p
1k
470
10V
100p 100p
470p
47k
470p
47k
10
50V
470
10 50V
470
7P
STK433-730-E
8P
1k
1k
470p
470p
47k
47k
10k
10k
10k
10k
10k
10k
10k
10k
470
470
470
470
470
470
2.2k
2.2k
470
470
470
470
470
470
0.01
0.01
470
470
*
*
*
*
CH21 IN
CH2 NF
STBY
CH1 NF
CH1 IN
MONIT
OR
SUB
+PRE
CH2 OUT
-
CH2 OUT+-
CH1 OUT
-
CH1 OUT+
+VCC
-VCC
-PRE
R-OUT
L-OUT
+B
GND
-B
GND
STBY
MNT
NC
AUDIO-IN L
GND
AUDIO-IN R
HP-R
SP-R
HPGND
HP-L
SP-L
R-IN
L-IN
POWER AMP
*
R516,519
2.2K
4.7K
4.7K
(BX20i)
(BX50BTi)
(BX50BTi)
*
(BX20i)
(BX50BTi)
(BX50BTi)
R517,518
22k
47k
47k
AUDIO IN
PHONES
(CHASSIS)
C521
EP502
0.1
C522
0.1
(CHASSIS)
(Page 33)
(Page 35)
(Page 35)
• See page 42 for IC Block Diagrams.
Ver. 1.4
HCD-BX20i/BX50BTi
HCD-BX20i/BX50BTi
38
38
6-17. PRINTED WIRING BOARDS - PANEL Section -
•
: Uses unleaded solder.
• See page 25 for Circuit Boards Location.
Q902
R928
R92
6
R92
7
C841
IC902
D915
R922
D905
R920
R919
Q901
C816
D904
R944
C919
C920
C91
7
C918
R934
R93
8
R937
R936
R935
R94
3
R942
Q903
Q905
C924
D807
C812
C811
R925
R921
C910
C908
R851
C90
7
FB901
R932
R933
R931
R929
R930
R85
2
C804
W801
W802
D903
S802
S803
IC901
C815
JW802
FL901
JW807
JW810
C814
L901
JW801
JW806
JW809
JW804
JW803
JW805
C805
JW8
11
C909
JW812
JW808
JW813
JW814
S801
D902
C838
R853
R854
R855
R85
6
R860
R861
R862
R863
R868
R86
4
R857
R86
9
R867
R865
R86
6
CN802
S807
S806
S805
S804
S812
S811
S813
S810
S809
S814
S821
S820
S819
S818
S815
S816
S817
FLUORESCENT INDICATOR TUBE
PANEL BOARD
1-876-052-
11, 12
(11, 12)
E
E
1
13
K
A
A
E
1
3
E
2C
1C
1
2
3
4
5
6
7
8
9
A
K
A
A
K
K
1B
2B
OPEN/CLOSE
BLUETOOTH OPR
BLUETOOTH OPR
(BX50BTi)
S801 – 803
E
MAIN BOARD
CN306
T801
DC/DC CONVERTER
STANDBY
POWER
(CHASSIS)
F
MAIN BOARD
CN322
1-876-055-
TOP KEY BOARD
Y
ENTER
DSGX
DISPLAY
FUNCTION
AUDIO IN
(BX20i)
(BX50BTi)
(BX20i)
(BX50BTi)
+
+
–
VOL
1
4
TUNE –
–
TUNE +
PLAY MODE/
TUNING MODE
REPEAT/
FM MODE
CANCEL
CD
TUNER/
BAND
iPod
S804 – 807,
S809 – 821
S809 – 821
A
B
C
D
E
F
G
H
I
J
1
2
3
4
5
6
7
8
9
10
11
12
13
BLUETOOTH
(BX20i)
(BX50BTi)
TUNER/
BAND
CD
11, 12
(11, 12)
(Page 32)
(Page 32)
Ref. No. Location
• Semiconductor
Location
D807
C-12
D902
D-12
D903
B-1
D904
C-12
D905
C-12
D915
C-6
IC901
C-3
IC902
C-7
Q901
D-12
Q902
B-2
Q903
B-11
Q905
B-6
Ver. 1.1
HCD-BX20i/BX50BTi
HCD-BX20i/BX50BTi
39
39
6-18. SCHEMATIC DIAGRAM - PANEL Section -
• See page 42 for IC Block Diagrams.
CN802
R856
R855
R854
R853
R868
R863
R862
R861
R860
R864
R865
R866
R867
R869
R857
D915
R925
R921
C804
Q905
R942
R943
IC902
C815
C917
C918
C919
C920
C814
C816
R935
R936
R937
R938
R944
R934
C924
C910
D807
R932
R933
R931
C909
C908
D905
D904
C811
C812
L901
R930
R919
C907
Q903
R920
C805
FB901
R929
Q902
Q901
D903
T801
S801
S802
S803
R851
R852
S807
S806
S805
S804
S820
S818
S815
S816
S817
S819
S821
S811
S812
S813
S814
S810
S809
FL901
R926
R927
R928
R922
D902
IC901
C841
4P
15k
10k
4.7k
2.2k
10k
4.7k
2.2k
2.2k
1k
1k
2.2k
2.2k
4.7k
10k
15k
MC2838
470
47
1
2SC3052F
10k
22k
PT6302
22
50V
0.001
100p
100p
100p
22
50V
47p
1k
0
0
0
1k
2.2k
100p
0.01
UDZW-TE17-
6.2B
100
100
10k
47
50V
0.01
MC2838
MC2836
0.01
0.01
2.2k
0
0.022
CPH5504-TL-E
0
47
25V
2.2
RT1N141C
RT1P441C
SELK5E200
-DTP15
1k
2.2k
1K
1K
1K
47
SLI-325URC
NJL24H400A
0.1
54
55
53
52
53
54
55
57
57
52
1G
P1
P2
P3
P4
P5
P6
P7
P8
P9
P10
P1
1
P12
P13
P14
P15
P16
P17
P18
P19
P20
P21
P22
P23
P24
P25
P26
P27
P28
P29
P30
P31
P32
P33
P34
P35
P36
P37
P1
P2
P3
P4
P5
P6
P7
P8
P9
P10
P1
1
P12
P13
P14
P15
P16
P17
P18
P19
P20
P21
P22
P23
P24
P25
P26
P27
P28
P29
P30
P31
P32
P33
P34
P35
P36
P37
2G
3G
4G
5G
6G
7G
8G
9G
10G
11
G
1G
2G
3G
4G
5G
6G
7G
8G
9G
10G
11
G
KEY1
RETURN
KEY2
KEY3
DGND
+3.3V
GND
OUT
SIRCS
EVER 3.3V
KEY1
KEY1 RETURN
DGND
FL RESET
+9V
FL DATA
FL GND
4V
FLUORESCENT INDICATOR TUBE
INDICATOR TUBE
FLUORESCENT
LED
DRIVE
BLUETOOTH
OPR
LED
DRIVE
STANDBY
REMOTE CONTROL
RECEIVER
GRID DRIVE
DC/DC
CONVERTER
OSC
-1
-2
BLUETOOTH
OPR
FL CS
FL CLOCK
STBY LED
(BX50BTi)
DISPLAY
VOL
-
VOL
TUNE -
TUNE +
ENTER
REPEAT/
FM MODE
PLAY
TUNING
MODE
MODE/
DSGX
CANCEL
FUNCTION
-
CD
BLUETOOTH
CD
BAND
TUNER/
AUDIO IN
BAND
TUNER/
(BX50BTi)
(BX20i)
(BX20i)
(BX50BTi)
(BX50BTi)
+
+
2
3
4
6
5
1
9
7
8
DRIVER
(CHASSIS)
1
13
iPod
(Page 34)
(Page
34)
HCD-BX20i/BX50BTi
HCD-BX20i/BX50BTi
40
40
6-19. PRINTED WIRING BOARD - POWER Board -
•
: Uses unleaded solder.
• See page 25 for Circuit Boards Location.
C911
D907
D908
C905
R911
R910
R909
C902
R904
R906
C901
D922
R908
D906
D923
R905
R902
R901
D920
C906
C923
C922
JW924
JW925
JW923
JW931
JW911
D924
JW910
JW914
JW929
FH903
JW909
C921
FH904
JW926
C914
JW927
C936
FH901
FH902
C925
D912
JW928
JW932
JW930
F901
T902
LF901
RY901
D916
D918
CN904
D925
T901
D927
JW920
D926
F902
D914
D911
D913
CN901
D917
D919
JW934
JW933
JW935
CN905
CN902
CN903
CN906
WIRE900
R903
S901
1-876-054-
11, 12
(11, 12)
POWER BOARD
MAIN POWER
TRANSFORMER
SUB POWER
TRANSFORMER
NOT REPLACEABLE:
BUILT IN TRANSFORMER
BUILT IN TRANSFORMER
(AC IN)
1
3
K
A
A
K
K
A
K
A
A
K
A
A
LINE FILTER
J
MAIN BOARD
CN303
1
12
(BX20i: US, CND/BX50BTi)
(BX20i: AEP)
(EXCEPT BX20i: SP)
(EXCEPT BX20i: SP)
(EXCEPT BX20i: SP)
(EXCEPT BX20i: SP)
(BX20i: AUS)
A
B
C
D
E
F
G
1
2
3
4
5
6
7
8
9
10
11
12
13
14
(BX20i: SP)
(BX20i: SP)
(BX20i: SP)
3
1
3
1
(BX20i: SP)
1-876-059-
VOL SELECT BOARD
1
3
1
3
– 1
– 2
(CHASSIS)
(BX20i: US, CND/BX50BTi)
11, 12
(11, 12)
VOLTAGE SELECTOR
120V
T 220V T 230 – 240V
230 – 240V
t 220V t120V
(Page 32)
Ver. 1.4
Ref. No. Location
• Semiconductor
Location
D906
B-11
D907
C-9
D908
C-9
D911
F-10
D912
F-11
D913
E-10
D914
F-11
D916
G-10
D917
G-10
D918
G-11
D919
G-9
D920
F-13
D922
C-10
D923
C-9
D924
E-9
D925
D-10
D926
D-10
D927
E-9
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