Sharp VL-AH150 Service Manual Page 41

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41
VL-AH150U
VL-AH160U
7-4. MAIN BATTERY CIRCUIT SECTION BLOCK DIAGRAM
DC JACK input
Voltage detective
circuit
V
DC
<8V
with JACK : OPEN
with out JACK : GND Short circuit
Q2903 with FET always is "OFF" at DC input.
NON REG
Q2903
SYS 3.0V
REG circuit
ADP-DET
BATT.-DET
Charging : Red light up
Completion : Green light up
CHARGE-ON_H
PRE-CHARGE-ON
Charge control IC
Vcc
SW1 SW2
MM1332G
LV GND
EXT CEL CS
8
1
7
234
65
LED Red
LED Green
LED_G
LED_R
T
Ni-MH
battery
System microcomputer
Vcc
DC input lived
DC input "ON"
"OFF" detection
Battery voltage
detection
(BATT-TEMP)
T Terminal
detection
(BATT-IN)
VCR-H
Q2901
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