Read Panasonic CF-48 Service Manual online
3 - 1
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 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
Power Supply System
Description
On mode
Suspend
mode
Off/Hiber
nation
VC system (VC5, VC3, VC25, VC16, VC15) CPU and logic power supply
ON
OFF
OFF
VB system (VB5, VB3)
Logic power supply
ON
ON
OFF
VA system (VA3)
PMC power supply
ON
ON
ON
VPP system (VPP)
12V power supply, for the card slot
ON
OFF
OFF
Table 1: Description of Power Supply Systems
Li-Ion BATTERY
11.1V
5400mAh
11.1V
5400mAh
AC ADAPTOR 15.6V
BATTERY
CHARGER
DC/DC
CONVERTER
OUTPUT 5V
VOLTAGE
DETECTOR
AC IN*
DC/DC
CONVERTER
OUTPUT
1.6V /1.35V
DC/DC
CONVERTER
OUTPUT 3.3V
IC44
AC ON
OVERVOL
VOLTAGE
DETECTOR
VOLTAGE
REGULATOR
OUTPUT12V
VOLTAGE
DETECTOR
VOLTAGE
DETECTOR
SUSB*
SUSB*
SUSB
SUSC*
OVERVOL
ACVOK
OVERVOL
OVERVOL
VOLTAGE
REGULATOR
OUTPUT 1.5V
IC58
IC58
IC57
SUSB
IC43
VD12ON
IC46
IC16
VA3
VC1
VB3
VC3
VD12
SYSPW
VC5
VM1
VB5
AC15
VCT
VGA_CORE
VOLTAGE
REGULATOR
OUTPUT 2.5V
Q70
Q62
Q72
Click on the first or last page to see other CF-48 service manuals if exist.