Service manual

44
VL-A111U/AH131U
VL-AH151U/AH161U
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 is always "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 feed
DC input "ON" "OFF" detection
Battery voltage detection
(BATT-TEMP) T Terminal detection (BATT-IN)
VCR-H
Q2901