Testing - Nokia NSM-2 Series Disassembly & Troubleshooting Instructions

PAMS Technical Documentation
Reference
N310 PIN 8
N310 PIN 9
N400 PIN 4
N401 PIN 4
R118
R206
R211
R277
*Only in NSM–2..

Testing

The MCU software enters a local mode at start–up if suitable resistors are
connected to the BTEMP and BSI lines.
NOTE! Baseband doesn't wake up automatically when the battery voltage
is connected. Power must be switched on by
In the local mode the baseband can be controlled through MBUS or
FBUS connections by a PC–locals software. Baseband internal connec-
tions are tested with selftests if possible.
Parameters cannot be set accurate enough by design because of compo-
nent tolerances. Due to use of 5% resistor values, the channels of the
CCONT A/D converters need to be aligned in the production phase. With-
in battery voltage tuning the MCU software reads the A/D reading from
CCONT at 4.1V and stores this reading to emulated EEPROM memory as
a reference point. Another reference point is created by assuming that
while the input voltage is zero, A/D reading is also zero. Now the slope is
known and A/D readings can be calibrated. Calibration is included in
VBATT A/D reading task.
Issue 1 12/1999
Disassembly & Troubleshooting Instructions
Signal
LCDLED_ADJ
LCD LIGHT
IRONX
IRDA POWER
PWRONX
SENA
VPP
EAD
pressing the Power key or
inserting a waking pulse BTEMP line or
connecting a charger
E Nokia Mobile Phones Ltd.
Note
LCD BACKLIGHT BRIGHNESS ADJUST-
MENT
R310 –> UI–SWITCH (N310)
LCD LED LIGHT CURRENT
UI–SWITCH (N310) –> DISPLAY BACK-
LIGHT LEDS
IRDA (N400) SHUTDOWN
MAD (D200) –> IRDA (N400)
2.8V
N401 –> IRDA (N400)
POWER ON BUTTON
POWER BUTTON (S330) –> CCONT (N100)
HAGAR (N505) CHIP SELECT
MAD (D200) –> HAGAR (N505)
FLASH PROGRAMMING VOLTAGE
N220 –> COMPOMEMORY (D210)
ACCESSORY DETECTION
XMICP –> CCONT (N100)
NSM–2
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