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
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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

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Troubleshooting Instructions PAMS Technical Documentation
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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
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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.

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Troubleshooting Instructions PAMS Technical Documentation
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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
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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

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Troubleshooting Instructions PAMS Technical Documentation
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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
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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

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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

PAMS Technical Documentation Troubleshooting Instructions
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Power Doesn’t Stay on or Phone is Jammed
If this kind of fault occurs after flash programming, there may be open pins on ICs or
other discrete components. Solder joints on discrete capacitors and resistors and open
joints on components with pins, such as D302 (SRAM), should be checked first. The sol-
dered joints of ICs D300 (MAD2WD1), D301 and D303 (FLASH), N200 (COBBA_GJP), and
N100 (CCONT) are difficult to visually inspect since these components are CSP or uBGA
style packages.
A quick and easy way to test the solder joints on CSPs is to apply a small amount of pres-
sure to the top of the package while powering-up the phone. If the phone powers-up
while applying pressure to a specific component (e.g., MAD), then it can be assumed that
that component has faulty solder joints.
Normally, the power will be switched off by CCONT (N100) after 30 seconds if the
watchdog of the CCONT cannot be served by software. In order to verify if watchdog is
updated, verify that X400 pin-2 is high and at the same time X400 pin-13 toggles. In
normal cases, there is a short burst of pulses every 8 seconds.
The power-off function of CCONT can be prevented by connecting a short circuit wire
from R413 (end towards N100) to ground.

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Troubleshooting Instructions PAMS Technical Documentation
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Figure 5: Power Won’t Stay on or Jammed Phone
The label “C” refers to Figure 2.
Display Information: Contact Service
This fault means that software is able to run and thus, the watchdog of CCONT (N100)
can be served.
Self-test functions are run when power is switched on and software has started to exe-
cute from flash. If any of the self-tests fail, contact service information will be shown on
Power doesn't stay on or
phone is jammed
Check X400 pin 13 while
X400 pin 2 is high
pin 13 pulsing?
Software is able to run in phone. Check
UI-module.
If power is switched off in a few seconds,
check BSI and BTEMP lines.
Yes
Connect R413 (end
towards N100) to GND
C308 (end away from B400
buzzer) = 2.8V
and C112 (end towards N100) =
2.8V
No
Vbatt is correct 3.6V
N100 is faulty.
No
Yes
Yes
C

PAMS Technical Documentation Troubleshooting Instructions
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the display. This may indicate open solder joints on components, faulty PCB, or other
damage to the phone has occurred.
“Contact Service” may also indicate that the flash software has become corrupted. The
phone may then require either a simple re-flash or, in some cases, a total erase and
re-flash.
Phone Doesn’t Register to the Network or Phone Doesn’t Make a Call
If the phone doesn’t register to the network or the phone doesn’t make a call, the reason
could be either a baseband or RF part.
Wintesla service software can be used to set the required mode and determine if the
fault is in the RF or baseband sections (RF interface measurements).
The control lines for the RF section supply both the System ASIC (MAD2;D300) and the
RFI (Cobba_GJP; N200). MAD2WD1 handles digital control lines (synthena, TxP, etc.) and
Cobba handles analog control lines (AFC, TxC, etc.)
The DSP software is constructed so that operation states of DSP (MAD2WD1) can be seen
in external flag (DSPXF) output pin J314.
After power-up, DSP signals all completed functions by changing the state of the XF pin
(see Figure 6, Figure 7, Figure 8, and Figure 9).
Figure 6: The states of DSP (MAD2) after power on
MAD2WD1 pin D8
(DSPXF)
1 2 3
1. DSP initialization
2.Synchronization to
network done
3. Registrarition to
network done.
J314

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Troubleshooting Instructions PAMS Technical Documentation
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Figure 7: The states of DSP after power on
Figure 8: The states of DSP after power on
Figure 9: The states of DSP after power on
1
MAD2WD1 pin D8
(DSPXF)
J314
init
initialize patch code download
dsp
constants
download
initializatio
done
2
MAD2WD1 pin D8
(DSPXF)
J314
synchronizatio
OK
channel
scan starts
PSW
search last PSW
OK
3
MAD2WD1 pin D8
(DSPXF)
J314
send RACH
RACH OK
go SDCCH
imediate
OK

PAMS Technical Documentation Troubleshooting Instructions
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Issue 1 03/01 Nokia Mobile Phones Ltd. Page 15
Figure 10: Fault Finding for Network Registration or Call Problems
Phone doesn't register to the network
or
phone doesn't make a call
Analog supply voltage to
COBBA is > 2.7V?
(C201)
Check N100
Analog reference to
COBBA is 1.5V?
(C200)
No
Yes
Check R200, C140, C167
Check:
Supply voltage Vcp (C126) > 4.8V
Supply voltage VRX_1 (C108) > 2.7V
Supply voltage VRX_2 (C137) > 2.7V
Supply voltage VSYN_2 (C136) > 2.7V
during the receiving slot
Supply voltage VTX (C141) > 2.7V
during the transmitting slot
No
Yes
All OK?
Check N100, D300
D
No
Yes

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Troubleshooting Instructions PAMS Technical Documentation
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Figure 11: Fault Finding for Network Registration or Call Problems (Cont’d)
D
RF control lines:
AGC (R610) 0->2.3Vmax during receiving slot
AFC (C720) 0- 1.2V typ. during receiving slot
OK?
Check N200
Analog data signals:
RxIP & RxIN (C640, C641) 0->1.5V DC during
receiving slot
Recieved signal is biased to DC, amplitude 50mVpp
nominal and frequency 13MHz
OK?
Check N200 if DC fail
or
RF part
No
Yes
No
RF control line:
TxC (C524) 0->2.3Vmax during transmit slot
OK?
Check N200 if TxC fail
else
Check D300
Analog data signals:
TxIN & TxIP (C525) 0->0.8V DC during transmit slot
TxQN & TxQP (C526) 0->0.8V DC during transmit slot
Transmit signal is biased to DC, amplitude 300mVpp and
frequency 64kHz
Yes
No
Yes
OK?
Check RF part Check N200
NoYes

PAMS Technical Documentation Troubleshooting Instructions
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SIM Card is Out of Order
The hardware for the SIM interface from MAD2WD1 (D300) to the SIM connector (X100)
can be tested without a SIM card.
When the power is switched on and if the BSI line (X102;1) is grounded by a resistor, all
of the used lines (VSIM, RST, CLK, DATA) rise up to 5V four times. Thus, “Insert SIM card”
faults can be found without a SIM card.
The fault information “Card rejected” means that the ATR message (the first message is
always sent from card to phone) is sent from the card to the phone, but the message is
somehow corrupted, data signal levels are wrong, etc., or factory set values stored to the
EEPROM are not correct.

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Figure 12: Fault Finding for “Insert SIM Card” Error
Insert SIM card fault
Voltage < 1.5V on top of
R123 when BSI resistor is
connected
Check X102, R115, R123,
C119
No
Yes
VSIM (C143), DATAO (C131),
SIMRSTO (C130) and SIMCLKO
(C129) lines rise up to 5V after power
on
Check X100, R120
Yes
SIMPWR (J318), DATAA (J303),
SIMRSTA (J315), SIMCLK (J316),
SIMIOC (J317) rise to 2.8V after power
on
No
Faulty PCB, N100
Yes
Faulty D300
No

PAMS Technical Documentation Troubleshooting Instructions
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Figure 13: Fault Finding for Rejected SIM Card
Card rejected fault
VSIM according to spec.
2.8Vmin (3V card)
4.5Vmin (5V card)
Faulty PCB, N100
No
ATR data can be seen
at C131
Check X100, R120
ATR data can be seen
at J303
No
Yes
Yes
Check N100
SIM_IOControl line (J317) is
"1" during ATR message
Check D300
Check D300
No
Yes
No
Yes

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Troubleshooting Instructions PAMS Technical Documentation
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Audio failure: Uplink (microphone) and downlink (earphone) are broken
Figure 14: Fault Finding for Broken Uplink and Downlink Audio
Uplink and downlink are
broken
Voltage over C113
(HOOKDET) is 2.8V without
external audio devices
Check R113, R112, C113,
C176
Voltage over C110
(HEADDET) is 2.8V without
external audio devices
No
Yes
Check R110, R109, R108,
C110
Frequency at E501 (PCMSclk)
is 8kHz square wave logical
level during call
No
Yes
Check N200
Check for uplink and for
downlink broken
No
Yes