— 37 —
Primary Circuit
The voltages from both batteries, alkaline and Li-ion, apply to V5 and V3 circuits through the fuse when the
batteries is loaded.
CHGDTCTB is for Li-ion detect. When Li-ion is full charged CHGDTCTB becomes L.
ACDTCTB is for AC adapter detector. It detects whether AC adapter is used or not. When AC adapter is
used ACDTCTB becomes L.
IODTCT is for I/O BOX detector. It detects whether I/O BOX is used or not. When I/O BOX is used IODTCT
becomes L.
POWER SUPPLY CIRCUIT
The power supply circuit consists of 5 blocks which are Primary circuit, 5 V circuit, 3 V circuit , PCMCIA
power circuit and LCD power circuit as follows;
Alkaline
Li-ion
Fuse
5 V system
3 V system
LCD
AC Adapter
Primary
circuit
To Detector (VSUB)
IVR2430
PCMCIA
power circuit
5V circuit
3V circuit
LCD
power circuit
PCMCIA
ACDTCTB (to MB87A915)
IODTCT (to MB87A915)
CHGDTCTB (to MB87A915)
To 3V and V5 circuits.
F100
D100
C105
D101
F101
Q102
D102
Alkaline
(1.6 ~ 3.4 V)
Li-ion
(3.0 ~ 3.6 V)
F102
AC Adapter
I/O BOX
L100
L105
D110
C142
CR2032 X 2
Summary of Contents for PA-2400U
Page 1: ...Handheld Personal Computer PA 2400U PX 686 R MAR 1998 without price PA 2400U ...
Page 25: ... 22 7 Restoring starts 8 Click OK ...
Page 77: ... 74 P668 MROM MASK ROM for OS for dictionary ...
Page 78: ... 75 from MAIN PCB P686 LED LED ...
Page 79: ... 76 from MAIN PCB from MAIN PCB P686 PWKEY POWER KEY P686 2KEY EL CALB KEY ...
Page 80: ... 77 from MAIN PCB from MAIN PCB P686 ADP AC ADAPTOR P686 3PIN 3PIN I F ...