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SCD-XB790
24
24
5-5.
BLOCK DIAGRAM – DISPLAY/KEY CONTROL/POWER SUPPLY Section –
S810 – 813
AMS
L
l
S801 – 806
PUSH ENTER
S830
ROTARY
ENCODER
52
XRST DP
61 – 64, 1 – 30
45 – 32
46, 47
FLUORESCENT INDICATOR TUBE DRIVER
IC801
SEGMENT
DRIVE
Q803
D803
(MULTI-CHANNEL)
LED
DRIVE
Q701, 702
GRID
DRIVE
Q801, 802
FL801
FLUORESCENT
INDICATOR
TUBE
F1
F2
RECT
D905, 906
+3.3V
DAC+5V
A+7V
A+UR
RECT
D901, 902
A–7V
RECT
D903, 904
A–UR
VFL–33V
FLUORESCENT INDICATOR
TUBE DRIVER
(IC801)
–33V
REGULATOR
Q921
RECT
D917 – 920
T901
POWER
TRANSFORMER
R954
D302
D301
T902
POWER
TRANSFORMER
F1
F2
D922
D+3.3V
RECT
D909 – 912
A+3.3V
+2.5V
D+5V
A+5V
M+12V
(MOTOR DRIVE (IC512))
RECT
D913 – 916
+5V
(COIL/MOTOR DRIVE (IC502))
S991
POWER
LINE
FILTER
L901
(AC IN)
w w w . x i a o y u 1 6 3 . c o m
Q Q 3 7 6 3 1 5 1 5 0
9
9
2
8
9
4
2
9
8
1 3 9 4 2 2 9 6 5 1 3
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299