Pda Faultfinding; Introduction; Required Servicing Equipment; Block Diagram - Nokia 9000i Service Manual

RAE/RAK–1N
Faultfinding/Disassembly

PDA Faultfinding

Introduction

The purpose of this document is to provide methods to find the component that
is malfunctioning in the PDA module of the Communicator. Due to the large
integration scale used in the Communicator, it is always not possible to point the
faulty component for sure. However the flow diagram introduced here is made to
fulfill the aim as well as it is possible.

Required Servicing Equipment:

– PC for the PCLocals
– power supply
– RS cable
– digital multimeter
– oscilloscope
– frequency counter (optional)

Block Diagram

The block diagram of the Communicator PDA is described in the picture below:
CMT module
PDA
power
unit
RS232
Buffer
IR
tranceiver
Buzzer
Page 8 – 8
1Mx16
DRAM
00000h
–
1FFFFFh
io D 15:0 MA9:0
reset Cntrl
CPU
A21:1
Intel 80386BX
sio 1 LCD
sio 0
io PLL D9:0, S7:0
PLL circuit QWERTY
Clock
–keypad
generation
PDA module
After Sales
Technical Documentation
28F016SV 28F016SV 28F016SV
FLASH FLASH FLASH
CS1 CS0 UCS
3A00000h 3C00000h 3E00000h
– –
3BFFFFFh 3DFFFFFh 3FFFFFFh
PDA LCD
module
Softkeys
UI module
Original, 05/97
–