Technical Information; System Overview; System Configuration; Block Diagrams - Panasonic CF-48 Service Manual

3.Technical Information

3.1 System Overview

3.1.1 System Configuration

The main system is made up of a Main board, a SUB board, a Jack board, a LED board, a IF switch board,
a PAD board and a COM board.
The power circuit has voltage for individual 1.6V/2.5V/3.3V/5V/12V.
It also supports both mixed-voltage LSIs at 3.3V/5V and single-voltage LSIs at 3.3V.
The CPU operates at 1.6V, 1.35V(core)/2.5V; the main memory at 3.3V; the core logic at 3.3V/5V; and the
other main chips at 3.3V.
3.1.2 Power Supply System
The power supply used by the Main board is generated on the Main board based on the voltage from the AC adapter.
Power Supply System
VC system (VC5, VC3, VC25, VC16, VC15) CPU and logic power supply
VB system (VB5, VB3)
VA system (VA3)
VPP system (VPP)
Table 1: Description of Power Supply Systems
Power is supplied to the AC adapter and battery pack in that order when the RTC power is off or is in
suspend mode. When neither power supply can be accessed, power is supplied from the clock battery
(RTC battery).

Block Diagrams

Power Supply Configuration Diagram
AC ADAPTOR 15.6V
AC15
AC ON
VOLTAGE
DETECTOR
AC IN*
Li-Ion BATTERY
11.1V
5400mAh
OVERVOL
Q70
SYSPW
Q62
VM1
ACVOK
IC44
BATTERY
CHARGER
Q72
Description
Logic power supply
PMC power supply
12V power supply, for the card slot
IC43
VOLTAGE
REGULATOR
OUTPUT12V
VD12ON
IC58
DC/DC
VOLTAGE
CONVERTER
DETECTOR
OUTPUT 5V
SUSB
OVERVOL
IC58
DC/DC
VOLTAGE
CONVERTER
DETECTOR
OUTPUT 3.3V
OVERVOL
IC57
DC/DC
CONVERTER
VOLTAGE
OUTPUT
DETECTOR
1.6V /1.35V
OVERVOL
SUSB*
3 - 1
Suspend
On mode
ON
ON
ON
ON
SUSB
IC16
SUSC*
VOLTAGE
REGULATOR
OUTPUT 2.5V
IC46
SUSB*
VOLTAGE
REGULATOR
OUTPUT 1.5V
Off/Hiber
mode nation
OFF OFF
ON OFF
ON ON
OFF OFF
VD12
VC5
VB5
VA3
VB3
VGA_CORE
VC3
VCT
VC1