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Y111730 - 3
ECR7700 Service Manual
61
4-12 BATTERY CIRCUIT
VBB voltage is used Battery or VCC voltage.
The batteries are connect the CN2, through the diode at D1.
VBB goes to the CPU and external RAM, for backup voltage.
Battery specification
Type : SUM-3 × 3
Voltage: 4.5V
1
2
3
4
5
6
7
8
9
10
11
12
13
CN1
13pin*P2.0 JUMPER
VCC
A
K
D3
1N4148
A
K
D2
1N4148
A
K
D1
1N4148
1
2
CN2
B2B-XH
VBB
R11
9.1K/F (Dip)
R10
3.3K/F
PF
+
EC2
10uF_16V
C3
0.01uF
P_VHON
DRAWER
-Vpw VF1 VF2
VH
Battery 1.5Vx3pcs
R12
*RESISTOR (Dip)
WIND_ON
to P/S board
+
EC11
10uF_16V
BUZZER