Nokia NSB-5 Series Guide

Programmes After Market Services
NSB-5 Series Transceivers
Issue 1 03/01 Nokia Mobile Phones Ltd.
Troubleshooting Instructions

NSB-5
Troubleshooting Instructions PAMS Technical Documentation
Page 2 Nokia Mobile Phones Ltd. Issue 1 03/01

PAMS Technical Documentation Troubleshooting Instructions
NSB-5
Issue 1 03/01 Nokia Mobile Phones Ltd. Page 3
Contents Page No
Troubleshooting............................................................................................................. 5
Phone is Totally Dead ..................................................................................................5
Flash Programming Doesn’t Work ..............................................................................6
Power Doesn’t Stay on or Phone is Jammed .............................................................11
Display Information: Contact Service .......................................................................12
Phone Doesn’t Register to the Network or Phone Doesn’t Make a Call ...................13
SIM Card is Out of Order ..........................................................................................17
Audio failure: Uplink (microphone) and downlink (earphone) are broken ............ 20
Audio failure: Uplink (microphone) is broken........................................................ 21
Audio failure: Downlink (earphone) is broken ....................................................... 22
Charger Failure........................................................................................................ 23

NSB-5
Troubleshooting Instructions PAMS Technical Documentation
Page 4 Nokia Mobile Phones Ltd. Issue 1 03/01
List of Figures Page No
Figure 1: Fault Finding for Totally Dead Phone ............................................................... 6
Figure 2: Fault Finding for Flash Programming Errors ...................................................... 8
Figure 3: Fault Finding for Flash Programming Errors (Cont’d) .......................................... 9
Figure 4: Fault Finding for Flash Programming Errors (Cont’d) ........................................ 10
Figure 5: Power Won’t Stay on or Jammed Phone ...........................................................12
Figure 6: The states of DSP (MAD2) after power on........................................................ 13
Figure 7: The states of DSP after power on ................................................................... 14
Figure 8: The states of DSP after power on ................................................................... 14
Figure 9: The states of DSP after power on ................................................................... 14
Figure 10: Fault Finding for Network Registration or Call Problems ................................. 15
Figure 11: Fault Finding for Network Registration or Call Problems (Cont’d) .................... 16
Figure 12: Fault Finding for “Insert SIM Card” Error ..................................................... 18
Figure 13: Fault Finding for Rejected SIM Card ............................................................ 19
Figure 14: Fault Finding for Broken Uplink and Downlink Audio...................................... 20
Figure 15: Fault Finding for Broken Uplink Audio with Working Downlink ....................... 21
Figure 16: Fault Finding for Broken Downlink with Working Uplink ................................ 22
Figure 17: Fault Finding for Charger Failure ................................................................. 23
Figure 18: Fault Finding for Charger Failure (Cont’d) .................................................... 24

PAMS Technical Documentation Troubleshooting Instructions
NSB-5
Issue 1 03/01 Nokia Mobile Phones Ltd. Page 5
Troubleshooting
The following hints should facilitate finding the cause of the problem when the circuitry
seems to be faulty. This troubleshooting instruction guide is divided into the following
sections:
1 Phone is totally dead
2 Flash programming doesn’t work
3 Power doesn’t stay on or the phone is jammed
4 Display information: Contact Service
5 Phone doesn’t register to the network or phone doesn’t make a call
6 Plug in SIM card is out of order (insert SIM card or card rejected)
7 Audio fault
8 Charging fault
The first step to do is to carry out a thorough visual check of the module. Ensure in par-
ticular that:
• there are not any mechanical damages, and
• solder joints are okay.
Phone is Totally Dead
This means that the phone doesn’t take current at all when the power switch is pressed
(X400 pin 7) or when the watchdog disable pin is grounded. Used battery voltage must
be higher than 3.1V. Otherwise, the hardware of CCONT (N100) totally prevents power
from switching on.

NSB-5
Troubleshooting Instructions PAMS Technical Documentation
Page 6 Nokia Mobile Phones Ltd. Issue 1 03/01
Figure 1: Fault Finding for Totally Dead Phone
Flash Programming Doesn’t Work
The flash programming can be done via panel connector X201 or via system connector
X200.
In production, the first programming is done via panel connector X201. After this, the
panel connector is cut away, thus other flash programming must be done via system
connector X200.
Phone is totally dead.
Measure voltage at N101
pin 5 (VBAT)
3.6V
Measure voltage at V103
pin 1
3.6V
Power doesn't stay on.
No
Yes
Yes
No
Failure in VBAT.
Check X101, X102, L710
Measure voltage at R413 (end
towards CCONT) when pwr-switch
(X400 pin 7) is pressed or
WDOGDISABLE (X201 pin 11) is
grounded.
0V
(Will be low only during power-
up of CCONT if power switch is
pressed.)
Measure voltage at V109 pin 4 (Vbb)
2.8V
C112 (VXO) 2.8V
When PWR switch is pressed or
WDOGDISABLE is grounded.
Voltages OK?
No
Yes
Check R413, V410
Check LCD-module
Check WDOGDISABLE line
Yes
No
Faulty PCB
Faulty PCB

PAMS Technical Documentation Troubleshooting Instructions
NSB-5
Issue 1 03/01 Nokia Mobile Phones Ltd. Page 7
The main differences between these are:
• FLASH programming voltage (Vpp) is produced a different way, and
• Signal routings are different.
The fault-finding diagrams for flash programming are shown in Figure 2, Figure 3, and
Figure 4.
In cases of flash programming errors, the flash prommer can provide some information
about a fault. The fault information messages could be:
• MCU doesn’t boot
• Serial clock line failure
• Serial data line failure
• External RAM fault
• Algorithm file or alias ID don’t find
• MCU flash Vpp error

NSB-5
Troubleshooting Instructions PAMS Technical Documentation
Page 8 Nokia Mobile Phones Ltd. Issue 1 03/01
Figure 2: Fault Finding for Flash Programming Errors
FLASH Programming
doesn't work.
Check if fault information from Prommer is one of the
following:
a) MCU doesn't boot
b) serial dataline failure
c) serial clock line failure
failure is one of the
above mentioned?
No
Yes
Connect watchdog disable (WDDIS R413
end towards N100) to GND.
C308 end away from B400 buzzer
and
C112 end towards N100 is 2.8V
Yes
Check WDDIS line:
X201 pin 11 -> R413 end towards N100
and
R413 other end -> X400 pin 7
Line OK?
Faulty PCB
See section "Phone is
totally dead".
No
NoYes
Master RESET PURX (R129)
is "1" (2.8V) after ca. 60ms
Check sleep clock
(C150 end towards D300 or
probe test point J301)
32kHz square wave
Check sleep clock circuit.
R117, R118, R126, C103,
C104, C150 and B100
No
No
Faulty N100 or overloaded
PURX line
Yes
13MHz clock
R835 (end away from
D350) 500mVpp min.
Yes
B
Yes
13MHz clock C300
(end away from D350)
800mV min.
Check C760, R706, R707,
V702, R717, C722, L701,
G701 Check R835, C820
No Yes
No
A
C

PAMS Technical Documentation Troubleshooting Instructions
NSB-5
Issue 1 03/01 Nokia Mobile Phones Ltd. Page 9
Figure 3: Fault Finding for Flash Programming Errors (Cont’d)
B
Check that the following lines are OK:
FCLK (MBUS) line: X200 pin 11, X201 pin 3 -> V102 pin 5
FTX (fbus_tx) line: X200 pin 13, X201 pin 1 -> V101 pin 5
FRX (fbus_rx) line: X200 pin 12, X201 pin 2 -> V101 pin 4
Check also pull-up and -down resistors: R106, R306, R307
GND: X200 pin 14, X201 pin 7 -> GND
OK? Repair or defective PCB
MAD or FLASH faulty.
Yes
No

NSB-5
Troubleshooting Instructions PAMS Technical Documentation
Page 10 Nokia Mobile Phones Ltd. Issue 1 03/01
Figure 4: Fault Finding for Flash Programming Errors (Cont’d)
A
External RAM fault?
ID problem?
MCU FLASH Vpp
Error
No
NO
Unknown fault.
Try phone totally dead.
No
Check pins of SRAM (D302)
Check control lines of SRAM: RAMselX ...
Yes
Check type of FLASH
Check soldering of FLASH
(Both FLASHES)
Yes
Check Vpp: X201 pin 10
to R303 (end towards
D301). Check Vpp_GND
from X201 pin 7 to R303
(other end). Check D100
Yes
Flashing from X201?
Check R302 and R303 in
both ends.
Voltage higher than
1.7V during flashing?
YesNo
Defect FLASH or flashing-
SW has wrong version.
Yes
Defective MAD
MCUGENIO03 or flashing-
SW has wrong version.
No