Nokia 2160 Service Manual trouble

TROUBLESHOOTING

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Contents

Troubleshooting for Base Band 6–2–3
Overview to base band troubleshooting 6–2–3
General 6–2–4
Current consumption failures in flash station 6–2–5
Phone takes all available current 6–2–5
Phone does not take current at all 6–2–5
Current consumption OK during power–up, then fail 6–2–5
Troubleshooting Diagram; Flash Programming OK, part 1 6–2–7
Troubleshooting Diagram; Flash Programming OK, part 2 6–2–8
Troubleshooting Diagram; Flash Programming OK, part 3 6–2–9
Troubleshooting Diagram; Flash Programming OK, part 4 6–2–10
Troubleshooting Diagram; PWR Button Fault 6–2–11
Troubleshooting Diagram; Display Selftest Failed 6–2–12
Troubleshooting Diagram; Audio Fault 6–2–13
Power Up Sequency Diagram 6–2–14
Repairing Instructions for Flash Faulty Units 6–2–15
Calib BATT_VOLTAGE = 6.0 V 6–2–16
Calib CHARGE_VOLTAGE = 6.0 V 6–2–16
Troubleshooting Diagram; Power Up and MCU Selftest Malfunctions 6–2–17
Power Up Malfunction 6–2–18
Troubleshooting Diagram; Power Up Malfunction 6–2–21
Troubleshooting Diagram; MCU Selftests Malfunction 6–2–22
Troubleshooting for RF 6–2–23
The Red Line of this Repair Guide 6–2–23
Alignment Stage References 6–2–23
Final Stage References 6–2–24
How to read those sheets? 6–2–25
ERROR A10; The DUT does not turn on 6–2–27
ERROR A13a; AFC tuning fails 6–2–29
ERROR A13b; UHF Synthesizer 6–2–30
ERROR A13c; VHF Synthesizer 6–2–31
ERROR A20; Fail in Bias Control tuning 6–2–32
ERROR A22–57a; Fail in power level table 6–2–35
ERROR A22–57b; Fail in power level table, part II 6–2–38
ERROR A22–57c; Fail in power level..., part III 6–2–40
ERROR A22–57d; Fail in power level..., part IV 6–2–42
ERROR A66; RX audio gain tuning fail 6–2–44
ERROR A67; SINAD – fail 6–2–45
ERROR A68; RSSI – level fail 6–2–47

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6–2–1

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6–2–2

ERROR A69–70; Tuning ST/audio deviation 6–2–48
ERROR A72; The I/Q Tuning fails 6–2–49
ERROR A73; Digital AGC tuning fails 6–2–51
ERROR A00; RF side supply voltages 6–2–53

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Troubleshooting for Base Band

Overview to base band troubleshooting

The purpose is to define fault block of the module and then find out the defect
component.

Baseband oriented failures are usually found out in the flash station of the pro­duction line.In the first phase,before programming the flash,the phone is started
to minimum mode and current consumption is measured.If current consumption
is in acceptable limits and MBUS registration is OK,flash is programmed.After
flash programming phone is started to local mode and tester starts to send
MBUS messages to activate MCU self tests.During the MCU self tests all the
major components of the baseband are tested.Every test returns number of the
test and result ( OK / failed ).All information of the test is stored to phone ori­ented test file,witch is available on the troubleshooting station.MCU self tests
can be restarted on trobleshooting station with SERVICE PCLOCALS.

If phone can be flashed and all/some self tests performed,the baseband is
mainly OK.By refering the test file of the phone,defect component or connec­tions between components can located.

6–2–3

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In case of current consumption/MBUS registration failure,the phone must be
taken to more specific measurements of voltages,clocking signals and states of
reset signals.

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General

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6–2–4

The purpose is to define fault block of the module and then find out the broken com­ponent. The trouble shooting diagram has been planned so that the fault, whatever
it is, can be found by as simple measurements as possible.

The flow diagrams give you the overview of the blocks. The purpose is that you
proceed through the flow diagram so that, if your answer is YES for the asked
question, go straight to the next level, but if your answer is NO, you have to go
the subbranch.

Required servicing equipment:
– PC for PC locals
– Power supply (2.0 A)
– Digital multimeter
– Oscilloscope
– Modular cable
– RS232/MBUS adapter

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Current consumption failures in flash station

Current consumption can fail in three ways in flash station.Typical to all these
failures is,that phone can not be programmed or tested via MBUS.The most
common failure is that phone takes almost normal current during startup and
after couple of seconds all circuits are powered down.Reason for this failure is
in power–,clock– or reset distripution of the phone.In cases where phone does
not take current at all or phone takes all available current the reason is usually
defected power ASIC PSL+ (N100) or bad soldering ( short or open ) around
PSL+ .

Phone takes all available current

If phone takes all available current,the reason for failure can be detected by:
– visual check of bad solderings in PSL+ (N100) , components around it and

bottom connector X1
– cheking ,if transistors V908,V910 and V911 in TX block are defected

6–2–5

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Phone does not take current at all

If phone does not take current at all,check following things:
– solderingins of PSL+

– VBATT voltage should be available in pins 5 and 20 of PSL+
If connections of PSL+ are OK and VBATT in pins 5/20 is OK, change defected
power ASIC N100

Current consumption OK during power–up, then fail

The most common situation in current consomption failures is,that phone starts
almost normally,but after few seconds all circuits are powered down.The pow­er–down is normally caused by lack of watch–dog signal from MCU to
PSL+.There are three major things to be checked in this kind of failure situa­tion.First,check power distribution to all main components of baseband.Then
check that clock is delivered to ASIC,DSP,MCU,RFI and AUDIO CODEC.If ev­erything is OK so far,check RESET status of circuitry mentioned above.

Cheking the power distribution of baseband

Before voltage measurements of the circuitry,power–down of PSL+ must be
prevented.This is done by shorting the watch–dog timing capacitor C106 with
wire soldered from one end of the cap to the other.

1.Check PSL+ output voltages from N100 pins 4,21,2,24 and 1.Expected value
is around 4.65V.Also,check voltage in N100 pin 12 (DETIN) to be 1.23V

2.Check supply voltage VL1 (4.65V) of MCU (D302) from pins 5 and 42.Check
VREF voltage from MCU pin 60.Check voltages of MCU related memory cir-

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6–2–6

cuits D300 (FLASH) pins 31 and 32,D305 (RAM) pin 28 and D307 (EEPROM)
pin 8

3.Check voltage VL1 from ASIC (D401) pins 1,36,57,73,108 and 122.Check
also supply voltage of RFC buffer (D402) from pin 5

4.Check voltage VL2 from DSP (D200) pins 8,11,36,39,49,64,76,87 and

90.Voltage should be around 4.65V.VL2 is also fed to DSP RAMs D201 and
D202 to pin 28.

5.Check voltages of RFI (N450).VL1 is fed to pins 48,52 and 60.VA1 (4.65V) is
fed via FET V450 to pins 5,10 and 13.If D450 is installed,check voltage VL1 in
pin 5.

6.Check supply voltages of AUDIO CODEC.VA2 is fed to pins 2,3 and 15 via
R159 (2R2).Voltage sould be around 4.60V.

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Troubleshooting Diagram; Flash Programming OK, part 1

FLASH programming OK

Check X1

C106 OK ?

YES

R100 OK ?

MBUS

registration

OK?

Power

stays on?
NO

NO

NO

VBATT

pins 5, 20?

YES

N100/XRESET/pin 8

+5 V after pwr on?

YES

YES

Display:

selftest failed

YES

3

Display:

selftest failed

YES

MBUS line X1/5

+5 V after pwr on?

YES

NO

NO

D302/MCU/pin 3

D401/ASIC/pin 56

rstrobex

Short circuits in data

data lines. data line

disconnected, VREF

unconnected

NO

R316

+ 5 V?

YES

D401 pulses

pin 91

YES

NO

pin 66/TXD

doesn’t apply

+5 V change

NO

6–2–7

If D302 at

D302

Change

ASIC
D401

YES

Change N100

Power supp. to the logic

circuits +5 V after pwr on?

NO

Change N100

MCU/D302/pin67/RDX

+5 V after pwr on (J109)?

NO

If R317 is OK
change D302

YES

2

ASIC OK

YES

Change first

D302

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Troubleshooting Diagram; Flash Programming OK, part 2

2

Change D302

YES

NO

9.72 MHz at

D302 at pin 69

NO

MCU/D302/pin 10

RESETX +5 V after

power on?

YES

9.72MHZ at MCU
/D3027pin 70

/XTAL ?

YES

NO

Change D230

6–2–8

Check D402
G580,D401

NO

9.72 MHZ at
D401 pin 70

YES

Check

R419

MCU/D302

/pin 8/MD2, MCU/D302

/pin 9/STNDBY?

+5V

YES

MCU/D302/pin43

/XPWROFF pulses up to

+5 V after pwr on?

YES

MCU/D302/pin77

/IRQ0 +5 V after

power on?

YES

MCU/D302/pin4

/WSTROBEX +5 V

after pwr on?

NO

NO

Change D302

NO

Change D302

NO

Check joints

and foils

Check D302

YES

Check all soldered joints

The data and address signals must

a clear difference between low (0 V)

and high (+5 V)

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Troubleshooting Diagram; Flash Programming OK, part 3

3

MBUS registration OK?

YES

Display: selftest failed?

YES

EEPROM

initialization OK?

YES

4

6–2–9

Check D302,

R320,R321

NO

NO

D307 EEPROM

/pins 5,6/SDA/SCL pulses

+5 to 0 V during r/w

action?

YES

Change D307

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Troubleshooting Diagram; Flash Programming OK, part 4

4

D300/FLASH

/pin 11 +12 V during

programming?

YES

D302/MCU

/pin 64/HOOK/RXD2

pulses during prog?

YES

NO

NO

Check X1/pin 14
C302,L300

Check X1/pin 6
R304,R305

6–2–10

X1/pin 7

/PHFS/TXD2 pulses

during programming?

YES

D300/FLASH

/pin 12/PWD +5 V

after power on?

YES

D300/FLASH

/pin 22/ROMSELX pulses

from +5 to 0 V after

power on?

YES

D300/FLASH

/pin 24/RSTROBEX pulses

from +5 to 0 V after

power on?

NO

NO

NO

NO

Check D302/pin 63
R314

Check D302

Check D302

Check D302

Check D300/FLASH
ADDRESS/DATA LINES
/no shortcircuits or
unconnected pins allowed

OK
Change D300

YES

D300/FLASH

/pin 9/WSTROBEX pulses

from +5 to 0 V after

power on?

NO

Check D302

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Troubleshooting Diagram; PWR Button Fault

Nothing happens when
PWR button is pressed

N100/PSL+

pin 10 +5 V when

VBATT is connected

YES

NO

N100/PSL pins 2,5

6–2–11

Check

X1

NO

VBATT voltage

YES

Change

N100

Change

UI

Check

UI–conn.

N100/PSL

pin 10 +5–>0 V when

push PWR button

YES

R100,C106

OK

Check component

around N100,if OK

change N100

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Troubleshooting Diagram; Display Selftest Failed

Display selftest failed or

phone doesn’t registrate to

the system (tester)

Use PCLocals to
find out a reason

MCU internal test
MCU RAM bus test
MCU ROM bus test

MCU IMEI test

YES

Unprogrammed FLASH

Unconnected pins in MCU

address or data lines

6–2–12

NO

MCU DSP code

download: failed,

DSP tests: no responce

RFI bus fault

NO

MCU audio codec

test: failed

YES

Codec N150/pin 16 : PCMDO
Codec N150/pin 13 : PCMDI
Codec N150/pin 11 : PCMCLK
Codec N150/pin 12 : XSELPCMC

YES

DSP clock input
DSP pins 45,46/XINT0/1
DSP pin 16/RWX
DSP pin 18/IOX
DSP pin 17/XMSTRB
DSP pin 69/DSPRSTX

DSP RAM D201,D202
DSP/DSPDA

DSP/DSPAD
RFI pin 18/RFIRESETX

RFI/RFIAD 3:0
RFI/RFIDA 11:0
RFI pin 49/RDX
RFI pin 50/WRX

RFI pin 53/RFICLK
RFI pin 59/RFI2CLK

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Troubleshooting Diagram; Audio Fault

Audio fault

Microphone or earphone

signal missing

CODEC pin 19/sync from ASIC

Microphone and
earphone signal

missing?

NO

Microphone signal

missing?

YES

YES

CODEC pin 20/CODEC_CLK from ASIC
DSP pins 29,37/PCMCOSYCLK from ASIC
DSP pins 27,33/PCMDATRCLK from ASIC

CODEC N150/pin 25,23 MICP,MICN
CODEC N150/pin 17 PCMOUT
CODEC N150/pin 21 MIC_EN

corresponding pins of UI–connector

6–2–13

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NO

Earphone signal

missing?

YES

CODEC N150/pins 7,8
CODEC N150/pin 10 PCMIN

corresponding pins of UI–connector

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Power Up Sequency Diagram

VBAT 5.5...8 V

CHRGDET 1.5 V

DETIN

ON

5,20

11

12

14

XPWROFF

C106

9

VL1 MCU CLK

VL2

VREF

1

VA

2

VA2

24

XRESET

888

VCTCXO

CLK 19.44 MHz

D402

CLK 19.44 Mhz

ASIC MCUPSL

70

14

69

BUFFER

RESET

IRQX

5 V=ON

6–2–14

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69

10

77

5,42 66

43

TXD

R166

XPWROFF 2 Hz

PSL
– Output voltages must be stay at high state at least 1.5 s when power is

switched on.
– If no; check C106.
– If it is OK; replace PSL.
– If the XRESET line doesn’t rise check CHRDET and DETIN. The voltage

value at these pins should be 1.5 V.
ASIC
– When XRESET and CLK are supplied to the ASIC but MCUCLK or RESETX

to the MCU are not supplied; replace ASIC.
MCU
– If MCUCLK and RESETX are supplied from ASIC but TXD line (MBUS)

doesn’t rise and solderings of the MCU are good; replace MCU.
– If TXD pin (MCU) goes to high but doesn’t stay at high state at least 1.5 s.

The power of the phone can be hold on following way:
– Connect PSL pin 14 to the ground.
– Lift MCU pin 77 IRQ0 and connect it to VL1.
Now its possible to use PCLocals software.

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Repairing Instructions for Flash Faulty Units

1. When the phone doesn’t start (power off after 2 seconds) check following things:
– VBATT is connected to the PSL N100
– XRES rise to high state
– VL1 is 4.7 V
– VREF is connected to the VCTCXO and the crystal is running frequency is

19.44 MHz
Measure:
– supply voltage of MCU D302
– reset signal for MCU (RESETX) rise high state
– MCU clocksignal is 9.72 MHz
– NMI line stay low
– IRQ0 rise high state

6–2–15

If things (mentioned above) are ok, the MCU starts supply poweroff pulses to
the PSL N100 and the power stay on.

Most likely IRQ0 stay low, which means that interrupt is generated all the time.
In these cases check data and addresslines of MCU’s and memory circuits.

There are shortcircuits or unconnected pins.
The power can be forced stay on by connected PSL N100 pin 14 to the ground.

2. When FLASH PROGRAMMING is not succeed, check following things:
– System connector X1 pins 6, 7, 14 are soldered and there are no shortcir-

cuits.
– Flash programming voltage (12 V) is connected to D300 pin 11.
– The data and addresslines of flashcircuit D300 are soldered.
– EEPROM D307 should be OK because of the initialization (program param-

eters are loaded always when program is loading the first time).

3. When FACTORY SET is not succeed or the power is switched off after programming:
When power is switched on the program of the phone will start so called maxi-

mum mode and if this doesn’t work there was happened mistake during the
flash programming.

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4. If selftest (A) is failed, check:
– Solderings of EEPROM D307
– Do factory set once again (setup error in EEPROM D307)

5. If selftest (B) is failed, check:
– Reset signal DSPRSTX for DSP (D200 pin 69) is high state.
– Clock signal at pin 66 (DSP) is 38.88 MHz (square wave; amplitude 5 V).
– Check solderings of D200, D201 and D202.

Calib BATT_VOLTAGE = 6.0 V

a) Check R100,R101
b) Check N100 pin 23
c) Check D302 pin 52

Calib CHARGE_VOLTAGE = 6.0 V

6–2–16

Copyright  Nokia Mobile Phones

a) Check R104,R116
b) Check D302 pin 53

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Troubleshooting Diagram; Power Up and MCU Selftest Malfunctions

RADIO UNIT CHECK

Press power on

Current

consumption

OK?

YES

NO

See Power Up

Malfunction

6–2–17

Run self tests

OK?

YES

Call process

Audio check

OK

NO

See Self Tests

Malfunction