Block Diagram - Display/Key Control/Power Supply Section - Sony SCD-XB790 Service Manual

SCD-XB790
Q Q
3 7 6 3 1 5 1 5 0
5-5. BLOCK DIAGRAM – DISPLAY/KEY CONTROL/POWER SUPPLY Section –
S810 – 813
KEY0 60
S801 – 806
KEY1 61
KEY2 62
REMOTE
CONTROL
RM 82
RECEIVER
IC802
CPU
IC901 (3/3)
LED
LED DRV 57 DRIVE
Q701, 702
T E
L 1 3 9 4 2 2 9 6 5 1 3
FLUORESCENT INDICATOR TUBE DRIVER
FLOUT 53 55 FL. DATA (DI)
FLCLK 54 54 FL. CLK (CL)
FLCS 56 53 FLT (CE)
50 OSC0
C815,
OSC
R801 51 OSC1
XRST DP
(Page 22) 31
w w w
S830
ROTARY
ENCODER
l AMS L
PUSH ENTER
D803
(MULTI-CHANNEL)
IC801
F1
SEGMENT
S35 31 DRIVE
Q803
FL801
FLUORESCENT
INDICATOR
TUBE
GRID
DRIVE
Q801, 802
F2
52
x a o
y
. i
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8
D301 D302
+3.3V
+3.3V
REGULATOR
IC302
DAC+5V
A+7V
A+UR
A–7V
A–UR
Q Q
3 7 6 3
VFL–33V
FLUORESCENT INDICATOR
TUBE DRIVER
(IC801)
D922
+2.5V
+2.5V REGULATOR
IC702
D+3.3V
A+3.3V
D+5V
A+5V
M+12V
(MOTOR DRIVE (IC512))
+5V
REGULATOR
(COIL/MOTOR DRIVE (IC502))
u 1 6 3
.
24 24
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2 4
9 9 8
RECT
D905, 906
+5V
REGULATOR
IC903
TRANSFORMER
+7V
RECT
REGULATOR
D901, 902
IC901
–7V
RECT
REGULATOR
D903, 904
IC902
1 5 1 5 0 8 9 2 4
TRANSFORMER
R954
–33V
RECT
REGULATOR
D917 – 920
Q921
F1
F2
+3.3V
RECT
REGULATOR
D909 – 912
IC904
+5V
REGULATOR
IC906
+12V
RECT
REGULATOR
D913 – 916
IC905
+5V
IC504
m
c o
2
9 9
T902
POWER
9 8 2 9 9
T901
POWER
S991
POWER
LINE
FILTER
L901
(AC IN)