Flash Programming Failure (3) - Nokia NSE-6 SERIES Service Manual

PAMS
Technical Documentation

Flash Programming failure (3)

Check C213, R213
YES
NO
RFC (C664) 13 MHz
800 mV min
NO
Check buffer V660 and
VCTCXO G660
Original 08/98
Flash programming doesn't work
YES
If the fault information from prommer is:
a) MCU doesn't boot
b) Serial data line failure
c) Serial clock line failure
connect watchdog disable (WDDIS, J111)
line to the ground
OK
VBB (R115, C107 upper side) 2.8 V
VXO (C149 upper side ) 2.8 V
YES
J227 master reset (Purx) = "1" (2.8 V)
YES
RfClk (R213 lower side) 13 MHz sine wave
clock signal: 500 mV min
pp
YES
Check that following lines are correct:
FTX (fbus_tx) line: X001 pin 1 ––> R215
FRX (fbus_rx) line: X001 pin 2 ––> R201
FCLK (MBUS) line: X001 pin 3 ––> R115
Check also pullup and pulldown resistors R115, R201, R215
GND: X001 pin 7 ––> GND
OK
Enable the selftest function of D200 by connecting
testpoint J229 to ground
Connect oscilloscope to testpoint J225
(ExtSysResetX) and switch power on
Voltage level rises to "1" after power on at testpoint J225
YES
There could be open pins in circuits D200 (D220, D240)
(open joints may be detectable with microscope)
If not, the PCB or D200 (D220, D240) is faulty.
Disassembly & Troubleshooting Instructions
NO
VBAT is correct 3.6 V
NO
J228 sleep clock (SCLK)
square wave 32 kHz
Faulty circuit N100
or overloaded PurX line
NO
NSE–6
YES
Faulty circuit N100
NO
Check sleep
clock circuitry
YES
(B101, R154..)
There is a shortcircuit
somewhere in memory control
lines or MCU address lines or
MCU lower (7:0) data lines
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