Sam4s ER-280 SERIES Service Manual page 71

A
[ POWER FAIL BLOCK ]
1
+24V VDD50V VDD50V VDD50V
R137 R136 R142
VDD50V
15K 27K 4.7K
8
U30:A
3
LM393D
2
4
CE10
R138 R139 C74
10uF
2K 4.7K 1uF
50V
2
[ BUZZER BLOCK ]
3
+24V
D5
MMBD6050LT1
R76
4.7K
3
1
BUZZER
2
R74 Q13
10K MMBT2222A
4
A
SAM4S ER-280 SERIES
B
C71
R140 100nF
4.7K
T8
1
INT0_PFAIL
C75
100nF
VDD50V
R64 100
R60 100
AU1
BUZZER
B
[ BATTERY BLOCK ]
NOTE] DIODE BAT43WS LEAKAGE CURRENT = MAX 0.5[uA]
VDD50V
VBAT
When Power On,
VBT Supply
D10
BAT43WS
When Power Off,
VBT Supply
R84 D11
470 BAT43WS
D14
BAT43WS
R82
R83 100
1K
1
BAT1
MS920S-FL27E
2
VDD50V
3.4V
D8
BAT43WS
★★ ★★ 그리스에만 적용
NOPOP →
[ DRAWER BLOCK ]
+24V
Q22 Q23
MMBT2222A SL1002
R133
4.7K
3
1
DRAWER
2 3
R135
10K
SEN_DWRCOMP
C
[ RTC BLOCK ]
X2
32.768KHZ
C58
15pF
R69
10K
LOWBAT
CON-BOX;4P,2.5MM,ST(YH)
D26
M4
4
CN12:4
3
CN12:3
VDD50V
2
1
R141
10K
2
CN12:2
1
C76
CN12:1
100nF
Size
A3
Date
File Name
C
D D
1
VBAT
C57
100nF
VDD50V
U24
VBAT
PCF8563TS R109 R111
4.7K 4.7K
1 8
OSCI VDD
2 7
OSCO CLKO
3 6
INT SCL
RTC_SCLK
4 5
VSS SDA
RTC_SDA
2
3
4
Shin Heung Precision Co., Ltd.
TITLE : ER-280 Rev
1.3
BAT/RTC/FAIL/BUZZER BLOCK
Drawn by
2007.02.28 K.Y CHOI
Sheet of
ER280 MAIN.SCH 4 11
D D
10-5