Nokia 6255 Service Manual

6255/6255i6256/6256i (RM-19)
Baseband Description and Troubleshooting

Nokia Customer Care

Page 24 

©2005 Nokia Corporation     Company Confidential

Issue 2 05/2005

C103

" Boot serial line fail."

Mbus from Prommer->UEME-
>UPP(MbusRx)(SA1)
FbusRx from Prommer->UEME->UPP 
FbusTx from UPP->UEME->Prommer

C104

"MCU ID message sending failed in the Phone."

FbusTx from UPP->UEME->Prommer

C105

"The Phone has not received Secondary boot 
codes length bytes correctly."

Mbus from Prommer->UEME->UPP(MbusRx) 
FbusRx from Prommer->UEME->UPP 
FbusTx from UPP->UEME->Prommer

C106

"The Phone has not received Secondary code 
bytes correctly."

Mbus from Prommer->UEME->UPP(MbusRx)
FbusRx from Prommer->UEME->UPP
FbusTx from UPP->UEME->Prommer

C107

"The Phone MCU can not start Secondary code 
correctly."

UPP

C586

"The erasing status response from the Phone 
informs about fail."

Flash

C686

"The programming status response from the 
Phone informs about fail."

Flash

Cx81

"The Prommer has detected a checksum error 
in the message, which it has received from the 
Phone."

FbusTx from UPP->UEME->Prommer

Cx82

"The Prommer has detected a wrong ID byte in 
the message, which it has received from the 
Phone."

FbusTx from UPP->UEME->Prommer

A204

Cx83

Cx84

Cx85

"The flash manufacturer and device IDs in the 
existing algorithm files do not match with the 
IDs received from the target phone."

"The Prommer has not received phone 
acknowledge to the message."

"The phone has generated NAK signal during 
data block transfer."

"Data block handling timeout"

Flash
UPP
VIO/VANA
Signals between UPP-Flash
Mbus from Prommer->UEME->UPP(MbusRx)
FbusRx from Prommer->UEME->UPP
FbusTx from UPP->UEME->Prommer

Cx87

"Wrong MCU ID."

RFClock
UPP(Vcore) 

Startup 
for 
flashing

Required startup for flashing

Vflash1
VBatt