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4-5.
BLOCK DIAGRAM – POWER SUPPLY Section –
SYSTEM CONTROLLER
IC501 (5/5)
RESET SIGNAL
38
XRESET
GENERATOR
BACKUP +5V
IC504
BATT IN
61
TEMP
70
TH501
HI UNREG
VIDEO 5V
BATT SENS
71
DC IN B+
SWITCH
84
DC IN MON
Q501
DC IN B+
DC IN A/D
73
D781
CHARGE B+
CHARGE A/D
72
D789
VIDEO 5V ON
100
DD SENSOR
98
DD MAIN
94
95
CHARGE ON
BATT CHK
96
BATT CONT
97
BATT IN MON
85
BL ON
93
05
M701
(FAN)
L707
FAN 5V
M
L703
L706
SWITCHING
SEN 5V
REGULATOR
Q702
L704
L710
SWITCHING
MA 5V
REGULATOR
Q703
B+ SWITCH
Q1331, 1332
L712
V 5V
L705
L711
SWITCHING
D 5V
REGULATOR
Q704
DC/DC CONVERTER
T701
D701
L709
12V
SWITCHING
REGULATOR
AU 3.5V
Q701
(AU VCC)
L708
D702
SWITCHING
Q706, 707
L753
D751
PS701
15.5V
B+ SWITCH
(HVDD, VVDD)
Q751, 753
MA 5V
SWITCHING
BACK LIGHT
DC/DC CONVERTER
UNIT
T702
D752
L754
PS702
BL 7V
BL ON
SWITCHING
Q705-2
4-11
HI UNREG
BACKUP +5V
SYSTEM CONTROLLER (IC501) B+
L701
DC/DC CONVERTER
IC701
46
RE A OUT
8
SCP: A
RE VCC
45
VCC
18
40
RE C OUT
24
SCP:C
39
RE D OUT
29
SCP: D
44
RE B OUT
13
SCP:B
20
POWER CONT
21
CTL B
CTL C/D
22
L751
10
CS2
Q705-1
VDD
2
9
EXT2
12
FB2
DC/DC CONVERTER
IC703
5
CS1
6
EXT1
3
FB1
SHDN2
15
11
SHDN1
DC IN B+
PS501
D782
+5V
REGULATOR
IC503
F701
D783
L702
F702
D784
L752
F703
D785
CHARGE
SWITCH
Q796
CHARGE
CONTROL SWITCH
Q787, 788
D786D786
B+ SWITCH
Q791, 792
BATTERY
Q789
CONTROL SWITCH
BATTERY
Q781, 782
CHECK SWITCH
B+ SWITCH
Q793, 794
BATTERY
CONTROL SWITCH
Q783, 784
B+ SWITCH
Q795
BATTERY
CONTROL SWITCH
Q785, 786
4-12
LDI-100 (SYL)
J701
DC IN 8.4V
–
+
CHARGE B+
Not used
BATTERY
TERMINAL
F704
+
–
F705
F706
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