Nokia NHM-3 Series Operating instructions

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NHM-3
Trouble Shooting PAMS Technical Documentation
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Trouble Shooting.................................................................................................1
Trouble Shooting............................................................................................................ 4
Baseband ......................................................................................................................4
Phone is totally dead ....................................................................................................5
Flash programming doesn’t work ................................................................................6
Power doesn’t stay on, or phone is jammed ...............................................................9
Display Information: “Contact Service” ....................................................................10
The phone doesn’t register to the network or phone doesn’t make a call............... 11
Phone register failure .................................................................................................11
SIM related faults .....................................................................................................14
Charger failure ..........................................................................................................17
RF Troubleshooting ...................................................................................................18
Introduction ................................................................................................................18
RF Measurement points .............................................................................................20
HAGAR RF Can .................................................................................................... 21
Abbreviations in fault finding charts .........................................................................22
RF in general................................................................................................................ 23
EGSM Receiver ........................................................................................................... 24
General instructions for EGSM RX troubleshooting .................................................24
Fault finding chart for EGSM receiver ......................................................................26
EGSM Signal path ...................................................................................................... 26
RX/TX Switch........................................................................................................ 27
Front-end................................................................................................................. 27
Hagar....................................................................................................................... 27
PCN Receiver............................................................................................................... 28
General instructions for PCN RX troubleshooting ....................................................28
Fault Finding Chart for PCN receiver .......................................................................29
PCN Signal Path .......................................................................................................30
Front-end................................................................................................................. 30
Hagar....................................................................................................................... 30
EGSM Transmitter....................................................................................................... 31
General instructions for EGSM TX troubleshooting .................................................31
Path of the transmitted EGSM signal ........................................................................31
Faultfinding Chart for EGSM transmitter ..................................................................32
PCN Transmitter .......................................................................................................... 33
Path of the transmitted PCN signal.......................................................................................33
General instructions for PCN TX troubleshooting ....................................................33
Fault finding chart for PCN transmitter .....................................................................34
Synthesiser ................................................................................................................... 35
General instructions for Synthesiser troubleshooting ................................................35
26 MHz reference oscillator ( VCTCXO ) ................................................................35
VCO ..........................................................................................................................35
Fault finding chart for PLL Synthesiser ....................................................................36
PLL Block diagram ....................................................................................................37
Frequency lists ...........................................................................................................38
EGSM...................................................................................................................... 38
PCN......................................................................................................................... 39

PAMS Technical Documentation Trouble Shooting
NHM-3
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Wintesla Tuning................................................................................................................40
Which RF to tune after repairs ...................................................................................40
RX Calibration ...........................................................................................................41
RX Filter Calibration (Automatic) .............................................................................44
RX AM Suppression (Automatic) .............................................................................46
TX Power tuning ........................................................................................................50
EGSM...................................................................................................................... 50
PCN......................................................................................................................... 52
TX I/Q Tuning ...........................................................................................................54
Initial set-up EGSM ................................................................................................ 54
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Fig 1 Phone is Totally Dead ................................................................................................6
Fig 2 Flash programming doesn’t work...............................................................................8
Fig 3 Flash Programming ....................................................................................................9
Fig 4 Power doesn’t stay on, or phone is jammed...............................................................10
Fig 5 Wintesla Snapshot of MCU Self-tests........................................................................11
Fig 6 Phone register failure..................................................................................................12
Fig 7 Phone doesn’t register to the network ........................................................................14
Fig 8 SIM related faults .......................................................................................................15
Fig 9 SIM card rejected fault (2) .........................................................................................16
Fig 10 Audio faults ..............................................................................................................17
Fig 11 Charger failure..........................................................................................................18
Fig 12 RF Function Diagram...............................................................................................24
Fig 13 Transmitted EGSM signal........................................................................................32

NHM-3
Trouble Shooting PAMS Technical Documentation
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PAMS Technical Documentation Trouble Shooting
NHM-3
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NHM-3
Trouble Shooting PAMS Technical Documentation
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Phone is dead
J104 (VB) or
V440 Katode:
VBAT = 3.6V
Failure in VBAT line
Check X120, L123
J102 (WDDIS) = 3.6V Faulty N102 or
faulty PCB
J109 (VBB) = 2.8 V
J106 (VXO) = 2.8 V
when PWR switch is pressed
or J102 is grounded
J102 = 0V when PWR switch
is pressed or X200 pin 11 is
grounded
See section:
"Power Doesn't Stay On…" Faulty N102 CCONT
Check PWR switch.
Check WDDIS line:
PWR switch ->
J102 -> X200 pin 11
Faulty PCB
Yes
No
No
No No
No
Yes
Yes Yes

PAMS Technical Documentation Trouble Shooting
NHM-3
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NHM-3
Trouble Shooting PAMS Technical Documentation
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Flash programming doesn’t work
If fault information from Prommer is:
a) MCU doesn’t boot
b) Serial dataline failure
c) Serial clock line failure
Connect J102 (WDDIS) to GND.
No
Yes
J109 (VBB) = 2.8V
J106 (VXO) = 2.8V
See section: (2)
See section: "Phone is dead"
No
J101 (PURX) = "1" (2.8V)
after 60ms
Yes
Check J113 (SLEEPCLK)
= 32KHz square wave
Check sleepclock
circuit:
B110, R111,...
Faulty N102 CCONT
or overloaded PURX line
No No
Yes
Check buffer: V600, R607,...
V600 coll. (RFC)
= 13MHz clock, 800mVpp min.
Check G602
VCXO 26MHz
Yes
Yes
No Faulty N500 HAGAR
Ok
Check D302 Faulty D301 MAD2
or D311 Flash
Ok
Ok
Faulty PCB
No
Yes
Flash programming (1)
Check the following lines:
M-BUS: X200 pin 3 -> X100 pin 11 -> V170 pin 1
FBUS_RX: X200 pin 2 -> X100 pin 12 -> V171 pin 3
FBUS_TX: X200 pin 1 -> X100 pin 13 -> V171 pin 1
GND: X200 pin 7 -> X100 pin 14 -> GND
Check also pull-up and -down resistors: R172, 305, 306

PAMS Technical Documentation Trouble Shooting
NHM-3
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Algorithm file or
alias ID not found
External RAM
fault
Flash programming doesn’t work
MCU Flash Vpp
Error
Unknown fault.
See section:
"Phone dead"
No
Yes Check for activity on
control lines of SRAM:
J324 (RAMselX),... Faulty D310 SRAM
No
No
Check type of Flash
Yes
Yes
Yes Flashing via X200 Check Vpp line:
X200 pin 10 ->
R100 -> C349.
Check D100
Yes
Voltage at R100
higher than 1.7V
during flashing?
No
Faulty Flash or
flashing SW has
wrong version
Yes
Faulty D301 MAD2
or faulty D100 or
flashing SW has
wrong version
No
Faulty D301 MAD2
No
Flash programming (2)
Faulty PCB
No

NHM-3
Trouble Shooting PAMS Technical Documentation
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Power doesn’t stay on or phone is
jammed
CCONT watchdog is served?
(J103 pulses "1" -> "0")
Software is able to run
Check UI (keys and displ.)
If power is switched off
after few seconds, check
BSI and BTEMP lines
Connect J102 (WDDIS) to GND:
J109 (VBB) = 2.8V
J106 (VXO) = 2.8V See section: "Phone is dead"
J101 (PURX) = "1" (2.8V)
after 60ms Check J113 (SLEEPCLK) = 32KHz square wave
Check sleepclock
circuit:
B110, R111,...
Faulty N102 CCONT
or overloaded PURX line
No No
Yes
Check buffer: V600, R607,...
V600 coll. (RFC)
= 13MHz clock, 800mVpp min.
Check G602
VCXO 26MHz
Yes
Yes
No Faulty N500 HAGAR
Ok
Faulty circuit:
D301 MAD2, or
D310 SRAM, or
D311 Flash, or
N102 CCONT
Yes
Yes
Yes
No
Flashing can give a hint in
deciding which IC to replace.
E.g. changed Flash ID
indicates faulty Flash

PAMS Technical Documentation Trouble Shooting
NHM-3
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NHM-3
Trouble Shooting PAMS Technical Documentation
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MAD2 (DSPXF)
1 2 3
1. DSP initialization done.
2.Synchronization to network done.
3. Registrarition to network done.
J314

PAMS Technical Documentation Trouble Shooting
NHM-3
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1
2
3
MAD2 (DSPXF)
J314
MAD2 (DSPXF)
J314
MAD2 (DSPXF)
J314
i
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NHM-3
Trouble Shooting PAMS Technical Documentation
3DJH 1RNLD0RELOH3KRQHV/WG 2ULJLQDO
)LJXUH3KRQHGRHVQ·WUHJLVWHUWRWKHQHWZRUN
Phone doesn’t register to the network
or
phone doesn’t make a call
C254 (VCOBBA) > 2.7V
C240 (Vref) = 1.5V
Check supply voltage, during RX slot:
C157 (VCP) > 4.8V
C137 (VRX) > 2.7V
C131 (VSYN_1) > 2.7V
C133 (VSYN_2) > 2.7V
- during TX slot:
C142 (VTX) > 2.7V
Check synthesizer lines, during RX slot:
J501/J505 (SLE)
J502/J506 (SCLK)
J503/J507 (SData)
= Pulses "0" -> "1"
Check RF control lines, during RX slot:
R708 (RxC, N240) = 0 - 2.3V max.
R604 (AFC, VCXO) = 0 - 1.2V typ.
Check analog data signals, during RX slot:
R510 (RxIN, Cobba) = 0 - 1.5V DC
C519 (RxIP, Cobba) = 0 - 1.5V DC
Received signal is biased to DC,
nominal amplitude = 50mVpp,
freq. = 67.71MHz
Check RF control lines, during TX slot:
R518 (TxC, Cobba) = 0 - 2.3V max.
R512 (TxP, MAD2) = "0" - "1" (2.8V)
Check analog data signals, during TX slot:
(TxIN, Cobba)
(TxIP, Cobba)
(TxQN, Cobba)
(TxQP, Cobba)
Transmitted signal is biased to DC,
nominal amplitude = 300mVpp,
freq. = 67.71KHz
Check N102 CCONT
Check C144, C240, R240
Check N102 CCONT
and D301 MAD2
Check D301 MAD2
Check N240 Cobba
If DC failure:
Check N240 Cobba
Else:
Check RF part
If TxC failure:
Check N240 Cobba
If TxP failure:
Check D301 MAD2
Check N240 Cobba
Check RF part
Yes
No
No
Yes
No
Yes
No
No
Yes
Yes
No
Yes
Yes
No
No
Yes
Phone doesn’t register to the network...

PAMS Technical Documentation Trouble Shooting
NHM-3
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((3520DUHQRWFRUUHFW
)LJXUH6,0UHODWHGIDXOWV
"Insert SIM card"
Voltage < 1.5V on top
of R121 when BSI resistor
is connected
Check R120,
R121, C127
VSIM, DATA, RST and CLK lines
rises up to 5V after power on Check X160, R160, V160, C163, 164, 162, 160, 161
SIMIF(4:0) lines:
J310, J311, J312, J313
rises to 2.8V after power on
Faulty N102 CCONT,
or faulty PCB
Faulty D301 MAD2
Yes
No
No
No
Yes
Yes
Insert SIM card fault (1)

NHM-3
Trouble Shooting PAMS Technical Documentation
3DJH 1RNLD0RELOH3KRQHV/WG 2ULJLQDO
)LJXUH6,0FDUGUHMHFWHGIDXOW
"SIM card rejected"
VSIM according to spec.:
2,8V min. (3V SIM card)
4,5V min. (5V SIM card)
Faulty N102 CCONT,
or faulty PCB
ATR data can be
seen at C162 Check X160, R160
ATR data can be
seen at J300 Check N102 CCONT
J311 (SIM_IO Control line)
is "1" during ATR message
Yes
No
No
No
Yes
Yes
Check N102 CCONT
Yes
Check D301 MAD2
No
SIM card rejected fault (2)

PAMS Technical Documentation Trouble Shooting
NHM-3
2ULJLQDO 1RNLD0RELOH3KRQHV/WG 3DJH
)LJXUH$XGLRIDXOWV
Earpiece doesn’t work
and there isn’t any
mechanical problem
Check R247, C248,
C249,C246,C247
Replace N240 Cobba
Ok
Microphone doesn’t work
and there isn’t any
mechanical problem
C233 towards SRAM (bias) = 2.1V Check R206, R233,
V231, C234, C236
Check MIC line to Cobba:
L204, C230, C231, C232,
C233, C237, C238, R228, R206
Replace N240 Cobba
Headset earpiece doesn’t work
and there isn’t any
mechanical problem
Check Z201, R210, R213,
R214, C213
Yes
No
Ok
Replace N240 Cobba
Ok
Audio faults
Headset microphone doesn’t work
and there isn’t any
mechanical problem
R220 (bias) = 2.1V Check
R212, R201, R203,
V202, C202, C203
Check XMIC line to Cobba:
L202, R220, R221, C223,
C224, C225, C226, R226, R227 Replace N240 Cobba
Yes
No
Ok

NHM-3
Trouble Shooting PAMS Technical Documentation
3DJH 1RNLD0RELOH3KRQHV/WG 2ULJLQDO
&KDUJHUIDLOXUH
)LJXUH&KDUJHUIDLOXUH
YES
Nothing happens when charger is connected
R103 towards C101 (VCHAR, N102) > 0.4 V
when charger is connected NO Check
X100, F101, L101
R102, R103
YES
N102 is faulty
Display Information: “Not charging”
YES
R121 towards C127 (BSI, N102) ≈0.8 V
when power is connected.
BSIresistor value should be 39K (BLS-2 batt)
NO Check
X120, R120, R122
YES
R123 towards C126 (BTEMP, N102) ≈0.5 V
when power is connected.
BTEMP resistor value should be47 K
NO Check
X120, R120, R122
YES
Voltage at R105 towards CHAPS (N100) and at R106
towards C105 are same as VB (VBATT)
NO Check
R105, 106, N100
Check PCB
YES
Voltage at R105 towards CHAPS (N100) and at R106
rises slowly when charger is connected NO Check N100

PAMS Technical Documentation Trouble Shooting
NHM-3
2ULJLQDO 1RNLD0RELOH3KRQHV/WG 3DJH
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NHM-3
Trouble Shooting PAMS Technical Documentation
3DJH 1RNLD0RELOH3KRQHV/WG 2ULJLQDO
([W$QWHQQD&RQQ (*60/1$ VW5;6$:V 3&1/1$
Power Amp.
RX/TX Switch/Diplexer
TX Buffer Transistors
2nd RW SAWs
TX Diplexer
HAGAR
VCO
VCTCXO EGSM TX SAW
RF Key Component placement