Nokia 7110 Service Manual trouble

PAMS Technical Documentation

NSE–5 Series Transceivers

Troubleshooting

Issue 1 07/99

NSE–5

PAMS

Troubleshooting

Contents

Baseband 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1. Phone is totally dead 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2. Flash programming doesn’t work 5. . . . . . . . . . . . . . . . . . . . . . . . . . .

3. Power doesn’t stay on or phone is jammed 9. . . . . . . . . . . . . . . . . .

4. Display Information: Contact Service 11. . . . . . . . . . . . . . . . . . . . . . .

5. The phone doesn’t register to the network 11. . . . . . . . . . . . . . . . . . .

6. SIM card is out of order 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7. Audio Faults 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.1 Uplink/Downlink Problem 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.1 Uplink Problem 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.1 Downlink Problem 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8. Charging Faults 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Technical Documentation

Page No

8.1 Seems Dead 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8.2 Display Problem 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Rf Troubleshooting 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Abbreviations in fault finding charts 22. . . . . . . . . . . . . . . . . . . . . . . . . . .

GSM Receiver 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PCN Receiver 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

GSM Transmitter 30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PCN Transmitter 33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Synthesizers 36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

UHF VCO 37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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PAMS

NSE–5

Technical Documentation

Troubleshooting

TroubleShooting Baseband

The following hints should facilitate finding the cause of the problem when the circuitry seems to be faulty. This troubleshooting instruction is divided following section.

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 thing to do is carry out a through visual check of the module.

Ensure in particular that: a) there are not any mechanical damages b) soldered joints are OK

Note:X201 is a connection that is ONLY present in the production. Therefore it is not applicable for the PAMS repair.

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NSE–5

PAMS

Troubleshooting

1. Phone is totally dead

This means that phone doesn’t take current at all when the power switch is pressed (X400 pin 7) or when the watchdog disable pin (X201 pin 11) is grounded. Used battery voltage must be higher than 3.1 V. Otherwise the hardware of CCONT (N100) prevents totally to switch power on.

Phone is totally dead.

Measure voltage at

C155 (VBAT)

3.6V

Technical Documentation

Measure voltage at

C153

Yes

3.6V

Failure in VBAT.

Check X101, X102,

L103, L102, R102

Voltages OK?

Yes

Power doesn’t stay on.

Measure voltage at V113 pin 4

C112 (end towards bottom) (VXO)

When PWR switch is pressed or

WDOGDISABLE is grounded.

(Vbb) 2.8V

2.8V

Yes

(Will be low only during

power switch is pressed.)

Faulty PCB

Measure voltage at R413 (end

towards edge) when pwr–switch

(X400 pin 7) is pressed or

WDOGDISABLE (X201 pin 11)

is grounded.

power–up of CCONT if

Figure 1.

Page 4

Faulty PCB

Check R413, V410

Check LCD–module

Check WDOGDISABLE line

Issue 1 07/99

PAMS

NSE–5

Technical Documentation

2. 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.

The main differences between these are: a) FLASH programming voltage is produced different way. b) Signal routings are different.

The fault finding diagrams for flash programming are shown in the next three figures

In flash programming error cases the flash prommer can give 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

Troubleshooting

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PAMS

Troubleshooting

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?

Yes

Connect watchdog

disable (WDDIS R413

end towards edge) to

GND.

C308 end towards RTC–battery

C112 end towards bottom (VXO)

(Vbb) is 2.8V

is 2.8V

Technical Documentation

FLASH Programming

doesn’t work.

X201 pin 11 –> R413 end towards edge

See section ”Phone is

totally dead”.

Check WDDIS line:

and

R413 other end –> X400 pin 7

Line OK?

NoYes

Faulty PCB

Yes

Master RESET (PURX

R147 towards board)) is ”1”

(2.8V) after ca. 60ms

Yes

13MHz clock

D700 pin 4

500mVpp min.

No Yes

Check R727, V702,

R728, R714, G701

Check sleep clock

(C150 end towards MAD)

32kHz square wave

RFC 13MHz

800mV min.

V702 collector

Yes

Check D700

Check sleep clock circuit.

R117, R118, R121, R135,

C103, C104, C149, B100

and C150

Faulty N100 or

overloaded PURX line

Figure 2.

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Technical Documentation

Check that the following lines are OK:

FCLK (M–BUS) line: X200 pin 11, X201 pin 3 –> V102 pin 4

FTX (fbus_tx) line: X200 pin 13, X201 pin 1 –> V101 pin 4

FRX (fbus_rx) line: X200 pin 12, X201 pin 2 –> V101 pin 5

(value on all should be 100 ohm)

Check also pull–up and –down resistors: R106, R304, R306

GND: X200 pin 14, X201 pin 7 –> GND

OK? Repair or defect PCB

Yes

Troubleshooting

Figure 3.

Check:

D304, D305, D306

OK?

Yes

MAD or FLASH faulty.

Repair

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NSE–5

PAMS

Troubleshooting

External RAM fault?

Yes

Check pins of SRAM (D302)

Check control lines of SRAM: RAMselX ...

Technical Documentation

ID problem?

MCU FLASH Vpp

Error

Yes

Check type of FLASH

Check soldering of FLASH

(Both FLASHES)

Yes

Unknown fault.

Try phone totally dead.

Check R145 and R146

in both ends.

Voltage higher than

1.7V during

Yes

Defect FLASH or

flashing–SW has wrong

version.

flashing?

Flashing from

Defect MAD

MCUGENIO03 or

flashing–SW has wrong

version.

X201?

YesNo

Check R146 for

connection to X201 pin

10 in one end and X201

pin 7 in the other end.

Check D100

Figure 4.

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Issue 1 07/99

PAMS

NSE–5

Technical Documentation

3. Power doesn’t stay on or phone is jammed

If this kind of fault has come after flash programming, there are most probably open pins in ICs. The soldered joints of ICs: D300 (MAD2Pr1), D301 & D303 (FLASH), N100 (CCONT), D302 (SRAM) are useful to check at first.

Normally the power will be switched off by CCONT (N100) after 30 seconds, if the watchdog of the CCONT can not be served by software.

Check watchdog is updated. X400 pin 2 is high and at the same time X400 pin 13 toggles. In the normal case 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 CCONT R413 (end towards edge) to ground.

Troubleshooting

Issue 1 07/99

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NSE–5

PAMS

Troubleshooting

Power doesn’t stay on or

phone is jammed

Check X400 pin 13

while X400 pin 2 is high

pin 13 pulsing?

Connect R413 end

towards edge to GND

Yes

Technical Documentation

Software is able to run in phone,

check UI–module.

If power is switched off after a few

seconds, check BSI and BTEMP lines.

Figure 5.

VBB (C308 end towards RTC

batt.) = 2.8V

and

VXO (C112 end towards

bottom) = 2.8V

Yes

Go To Figure

Vbatt is correct

3.6V

Yes

N100 is faulty.

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Issue 1 07/99

PAMS

NSE–5

Technical Documentation

Troubleshooting

4. Display Information: Contact Service

This fault means that software is able to run and thus the watchdog of CCONT (N100) can be served. Selftest functions are run when power is switched on and software is started to excute from flash. If any of selftests is failed, contact service information will be shown on display.

5. The 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 the baseband or the RF part. The phone can be set to wanted mode by Wintesla service software and determinate if the fault is in RF or in baseband part (RF interface measurements).

The control lines for RF part are supplied both the System Asic (MAD2;D300) and the RFI (Cobba_GJP; N200). MAD2Pr1 handles digital control lines ( like synthena, TxP etc.) and Cobba handles analog control lines (like AFC, TxC etc.).

The DSP software is constructed so that operation states of DSP (MAD2Pr1) can be seen in external flag (DSPXF) output pin J308.

After power up, DSP signals all completed functions by changing the state of the XF pin (see Figure 1–6, Figure 1–7, Figure 1–8 and Figure 1–9).

1. DSP initialization done

2.Synchronization to

network done

3. Registrarition to

network done.

1 2 3

MAD2Pr1 pin D8 (DSPXF)

J308

The states of DSP (MAD2) after power on

Issue 1 07/99

Figure 6.

Page 11

NSE–5

PAMS

Troubleshooting

PSW search last PSW

channel scan starts

The states of DSP after power on

Technical Documentation

MAD2Pr1 pin D8 (DSPXF)

synchronizatio OK

J308

Figure 7.

init initialize

patch code download

The states of DSP after power on

send RACH RACH OK

dsp constants download

initializatio ndone

go SDCCH imediate

assigment

MAD2Pr1 pin D8 (DSPXF)

J308

Figure 8.

MAD2Pr1 pin D8 (DSPXF)

The states of DSP after power on

Page 12

J308

Figure 9.

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