Nokia 7190 Service Manual 8trouble

Programmes After Market Services

NSB-5 Series Transceivers

T roubleshooting Instructions

Issue 1 03/01 Nokia Mobile Phones Ltd.

NSB-5

Troubleshooting Instructions PAMS Technical Documentation

Page 2 Nokia Mobile Phones Ltd. Issue 1 03/01

NSB-5

PAMS Technical Documentation Troubleshooting Instructions

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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NSB-5

Troubleshooting Instructions PAMS Technical Documentation

List of Figures

Page No

Figure 1: Figure 2: Figure 3: Figure 4: Figure 5: Figure 6: Figure 7: Figure 8: Figure 9: Figure 10: Figure 11: Figure 12: Figure 13: Figure 14: Figure 15: Figure 16: Figure 17: Figure 18:

Fault Finding for Totally Dead Phone Fault Finding for Flash Programming Errors Fault Finding for Flash Programming Errors (Cont’d) Fault Finding for Flash Programming Errors (Cont’d) Power Won’t Stay on or Jammed Phone The states of DSP (MAD2) after power on The states of DSP after power on The states of DSP after power on The states of DSP after power on

Fault Finding for Network Registration or Call Problems Fault Finding for Network Registration or Call Problems (Cont’d) Fault Finding for “Insert SIM Card” Error Fault Finding for Rejected SIM Card Fault Finding for Broken Uplink and Downlink Audio Fault Finding for Broken Uplink Audio with Working Downlink Fault Finding for Broken Downlink with Working Uplink Fault Finding for Charger Failure Fault Finding for Charger Failure (Cont’d)

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NSB-5

PAMS Technical Documentation Troubleshooting Instructions

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 particular that:

• there are not any mechanical dama ges, 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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NSB-5

Troubleshooting Instructions PAMS Technical Documentation

Phone is totally dead.

Measure voltage at N101

pin 5 (VBAT)

3.6V

Failure in VBAT.

Check X101, X102, L710

Voltages OK?

Yes

Measure voltage at V109 pin 4 (Vbb)

2.8V

C112 (VXO) 2.8V

When PWR switch is pressed or

WDOGDISABLE is grounded.

Measure voltage at V103

pin 1

3.6V

Faulty PCB

Measure voltage at R413 (end

towards CCONT) when pwr-switch

(X400 pin 7) is pressed or

WDOGDISABLE (X201 pin 11) is

grounded.

Yes

Power doesn't stay on.

Faulty PCB

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 conne ctor X201. After this, the panel connector is cut away, thus other flash programming must be done via system connector X200.

Yes

(Will be low only during power-

up of CCONT if power switch is

pressed.)

Check R413, V410

Check LCD-module

Check WDOGDISABLE line

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PAMS Technical Documentation Troubleshooting Instructions

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

FLASH Programming

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

doesn't work.

failure is one of the

above mentioned?

Yes

Connect watchdog disable (WDDIS R413

end towards N100) to GND.

C308 end away from B400 buzzer

C112 end towards N100 is 2.8V

and

Yes

Master RESET PURX (R129)

is "1" (2.8V) after ca. 60ms

Yes

X201 pin 11 -> R413 end towards N100

See section "Phone is

totally dead".

Check sleep clock

(C150 end towards D300 or

probe test point J301)

32kHz square wave

Check WDDIS line:

R413 other end -> X400 pin 7

and

Line OK?

Check sleep clock circuit.

R117, R118, R126, C103,

C104, C150 and B100

NoYes

Faulty PCB

Yes

13MHz clock R835 (end away from D350) 500mVpp min.

Check C760, R706, R707,

V702, R717, C722, L701,

G701

No Yes

13MHz clock C300

(end away from D350)

800mV min.

Check R835, C820

Faulty N100 or overloaded

PURX line

Figure 2: Fault Finding for Flash Programming Errors

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