Nokia 8850 Manual Do Serviço

NSM–2

Disassembly & Troubleshooting Instructions

PAMS Technical Documentation

Page  7

Issue 1  12/1999

 Nokia Mobile Phones Ltd.

Because of the underfilling of the MAD and combo memory, it is impossible
to change those.

C213

RFC

MAIN CLOCK (13MHz)
HAGAR (N505) –> MAD (D200)

J100*

PWM

CHARGE CURRENT CONTROL
CCONT (N100) –> CHAPS (N101)

J101

FBUSTX

FBUS TRANSMITTED DATA
MAD (D200) –> SERVICE INTERFACE

J102

FBUSRX

FBUS RECEIVED DATA
SERVICE INTERFACE –> MAD (D200)

J103

MBUS

ONE WIRE TWO DIRECTION SERIAL BUS
(9600 BIT/S)
MAD (D200) <–> SERVICE INTERFACE

J104

CCONT CSX

CCONT (N100) CHIP SELECT
MAD (D200) –> CCONT (N100)

J223

CCONT INT

CCONT (N100) INTERRUPT
MAD (D200) –> CCONT (N100)

J226

VCXOPWR

26MHz SYSTEM CLOCK CONTROL
MAD (D200) –> VCXO (G830)

J227

PURX

POWER UP RESET
CCONT (N100) –> MAD (D200)

J228

SLEEPCLK

SLEEP CLOCK (32kHz)
CCONT (N100) –> MAD (D200)

J230

GND

GROUND

J234*

HAGAR _RESET_X HAGAR (N505) RESET

MAD (D200) –> HAGAR (N505)

J235

ROM1SELX

FLASH CHIP SELECT
MAD (D200) –> COMBO MEMORY (D210)

J236

RAMSELX

RAM CHIP SELECT
MAD (D200) –> COMBO MEMORY (D210)

J237

SYNTHDATA

(SDATA)

HAGAR (N505) SERIAL DATA
MAD (D200) –> HAGAR (N505)

J239

DSPXF

NOT CONNECTED

J240

MCURDX

MCU READ
MAD (D200) –> COMBO MEMORY (D210)

J241

MCUWRX

MCU WRITE
MAD (D200) –> COMBO MEMORY (D210)

J242

MCUAD1

MCU ADDRESS LINE 1
MAD (D200) –> COMBO MEMORY (D210)