Technical Information; System Overview; System Configuration; Block Diagrams - Panasonic Toughbook CF-28 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 RJ board, an IR board, a Battery board and a TS13 board.
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, VC18,
VC16, VC15)
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*
BATTERY
CHARGER
Li-Ion BATTERY
11.1V
5400mAh
CPU and logic power supply
Logic power supply
PMC power supply
12V power supply, for the card slot
VOLTAGE
REGULATOR
OUTPUT12V
OVERVOL
VD12ON
DC/DC
CONVERTER
OUTPUT 5V
VM1
DC/DC
CONVERTER
OUTPUT 3.3V
ACVOK
DC/DC
CONVERTER
OUTPUT
1.6V /1.35V
SUSB*
3 - 1
Description On mode
SUSB*
VOLTAGE
DETECTOR
OVERVOL
VOLTAGE
DETECTOR
OVERVOL
VOLTAGE
DETECTOR
OVERVOL
Suspend Off/Hiber
mode nation
ON OFF OFF
ON ON OFF
ON ON ON
ON OFF OFF
SUSC*
SUSC*
VGA_CORE
VOLTAGE
REGULATOR
OUTPUT 2.5V
VOLTAGE
REGULATOR
OUTPUT 2.5V
VOLTAGE
SUSB*
REGULATOR
OUTPUT 1.5V
VD12
VC5
VA5
VB5
VA3
VB3
VC25
VC3
VCT
VC1