30
30
HCD-DZ20
HCD-DZ20
6-5. BLOCK DIAGRAM – POWER SECTION –
F1
F2
VFL
TO FLUORESCENT
INDICATOR TUBE
DC/DC
CONVERTER
T801
RECT
D801,802
D804,805
OSC
Q801
IC501 (4/4)
SYSTEM CONTROLLER
+5V
D943
D942
D944
D941
D922
Q921
T902
TRANSFORMER (SUB)
T901
TRANSFORMER(MAIN)
PC902
D931
D905
Q943,947
PC901
PC903
D901
E4V
E 4V
RF +3.3V
+21.7V
AC IN
SW3.3V
+5V
REG
M +9V
SW+5V
VOLTAGE
DETECT
Q901
VOLTAGE
CONTROLLER
Q945
MOTOR DRIVE
CONTROLLER
+3.3V
A5V
A9V
+12V
+1.8V
+1.8V
Q506
SWITCH
+12V
E 4V
Q502, 503
SW +5V
SWITCH
FL +3.3V
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
T E L
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