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HCD-BX20i/BX50BTi
Ver. 1.1
6-4.
BLOCK DIAGRAM - PANEL, POWER SUPPLY Section -
FL901
FLUORESCENT
INDICATOR TUBE
VFL
D904, 905
GRID DRIVE
Q905
59, 60
1 – 31, 61 – 64
32
33 – 42
AD2, AD1
SG5 – SG35,
GR1
GR2 – GR11
RSTB
SG1 – SG4
CSB
FLUORESCENT
CLKB
INDICATOR TUBE DRIVER
DIN
IC902
P1
57
(BX50BTi)
D903
LED DRIVE
Q902
BLUETOOTH OPR
LED DRIVE
D902
Q901
STANDBY
REMOTE CONTROL
RECEIVER
IC901
S801 – 807,
S809 – 821
(FRONT PANEL KEYS)
X302
5MHz
X301
32.768kHz
HCD-BX20i/BX50BTi
T801
DC/DC
CONVERTER
+9V
RECT
OSC
Q903
I-POWER MONITOR
66
52
90
FL RESET
53
91
FL CS
54
93
FL SCLK
55
92
FL SD
SYSTEM CONTROLLER
IC301 (4/4)
CD ON
57
89
STANDBY LED
4
SIRCS
KEY1 – KEY3
D774
74
KEY WAKE UP
DMPORT POWER
80
X5V FLAG
94
15
XIN
XOUT
13
10
INOUT
11
XCOUT
RESET SIGNAL
AC CUT
20
RESET
RESET
12
SWITCH
Q309
STBY-RELAY
5
PROTECT
DETECT
Q333, 338
UNREG SUB
+1.5V
CD +1.5V
REGULATOR
IC201
+3.3V
DVDD +3.3V
REGULATOR
Q302, 303,
AVDD +3.3V
Q390, 392
VM +7V
D318, 321
+9V
TUNER, BT +9V
REGULATOR
IC307
+9V
(BX50BTi)
+3.3V
BT +3.3V
REGULATOR
IC903
+3.3V
IP +3.3V
REGULATOR
IC102
VBUS POWER
ON/OFF SWITCH
VBUS +5V
IC201
D303
EVER +3.3V
B+ SWITCH
SYS +3.3V
Q312, 313
UNREG SUB
AC DETECT
GENERATOR
Q301
IC310
24
24
MAIN POWER
TRANSFORMER
T901
D920
PROTECT
D332
D322
VOLTAGE
DETECT
+9V +4V
Q393
+9V
F901
RECT
REGULATOR
D911 – 914
IC305
+5V
F902
RECT
REGULATOR
D924 – 927
IC306
AMP B+
TO
RECT
POWER AMP
D916 – 919
AMP B–
D330
REGULATOR
Q304 - 306
SUB POWER
TRANSFORMER
T902
RECT
D907, 908
D922
D923
RELAY
DRIVE
Q315
PROTECT
J
(Page 23)
Abbreviation
SP
: Singapore model
AC DET
K
(BX20i: SP)
(Page 23)
VOLTAGE
SELECTOR
S901
(AC IN)
LINE
FILTER
LF901
(EXCEPT BX20i: SP)
RY901
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