Nokia 3210 Service Manual trouble

PAMS Technical Documentation
NSE–8/9 Series T ransceivers
Troubleshooting
Issue 1 07/99
NSE–8/9
PAMS
Technical Documentation
CONTENTS
Abbreviations in fault finding charts 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Baseband Trouble Shooting 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.1. Phone is totally dead 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2. Flash programming doesn’t work 6. . . . . . . . . . . . . . . . . . . . . . . . .
4.3. Power doesn’t stay on or phone is jammed 11. . . . . . . . . . . . . . . .
4.4. Display Information: Contact Service 13. . . . . . . . . . . . . . . . . . . . . .
4.5. The phone doesn’t register or phone doesn’t make a call 13. . . .
4.6. Plug in SIM card is out of order . 17. . . . . . . . . . . . . . . . . . . . . . . . . .
4.7.Audio fault. 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.8. Charging Fault 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RF Troubleshooting 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PCB Bottom view(GF7) 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PCB Top view (GF7 + GD7) 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2. GSM Receiver 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1 .General instructions for GSM RX troubleshooting 27. . . . . . . . . . . . . . . .
2.2 .Path of the received GSM signal 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3.Fault finding chart for GSM receiver 28. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3. PCN Receiver 31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1 .General instructions for PCN RX troubleshooting 31. . . . . . . . . . . . . . . . .
3.2 Path of the received PCN signal 31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3 Fault finding chart for PCN receiver 32. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4. GSM Transmitter 36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.1 General instructions for GSM TX troubleshooting 36. . . . . . . . . . . . . . . . .
4.2 Path of the transmitted GSM signal 36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3 Fault finding chart for GSM transmitter 37. . . . . . . . . . . . . . . . . . . . . . . . . . .
5. PCN Transmitter 38. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1 General instructions for PCN TX troubleshooting 40. . . . . . . . . . . . . . . . . .
5.2 Path of the transmitted PCN signal 40. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3. Fault finding chart for PCN transmitter 41. . . . . . . . . . . . . . . . . . . . . . . . . .
6. Synthesizers 44. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.1 General instructions for Synthesizer troubleshooting 44. . . . . . . . . . . . . . .
6.2 13 MHz reference oscillator 44. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.3.VHF VCO 44. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.4.UHF VCO 45. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.5.Fault finding chart –UHF VCO and 13 MHz ref. oscillator 46. . . . . . . . . . .
Page 2
Issue 1 07/99
PAMS
NSE–8/9
Technical Documentation
Abbreviations in fault finding charts
BB Baseband DC Direct Current ESD Electro Static Dicharge f: Frequency of signal (measured with Spectrum Analyzer) LO Local Oscillator P: Power of signal –dB) (measured with Spectrum Analyzer) PA Power Amplifier PCB Printed Circuit Board PLL Phase Locked Loop RF Radio Frequency
RX Receiver T: Time between pulses TX Transmitter UHF Ultra High Frequency V: Voltage of signal (measured with oscilloscope) VCO Voltage controlled oscillator VHF Very High Frequency
Issue 1 07/99
Page 3
NSE–8/9
PAMS
Technical Documentation

Baseband Trouble Shooting

The following hints should facilitate finding the cause of the problem when the cir­cuitry seems to be faulty. This troubleshooting instruction is divided into the following section.
4.1 Phone is totally dead
4.2 Flash programming doesn’t work
4.3 Power doesn’t stay on or phone is jammed
4.4 Display Information: Contact Service
4.5 The phone doesn’t register to the network or phone doesn’t make a call
4.6 Plug in SIM card is out of order ( insert SIM card or card rejected).
4.7 Audio fault.
4.8 Charging Fault
The first thing to do, is carry out a through visual check of the module. Ensure in particular that:
a) there is not any mechanical damage (especially battery connector X101, X102) b) solder joints are OK
NOTE: X201 is a connection that is ONLY present in the production. Therefore it is not applicable for the PAMS repair.
Service interface J100 - J105 should be used along with service tools: – TDS–7 ( Service battery )
MJS–13 ( Module repair Jig ) The diagnostics on the following pages assumes that the tranceiver bd. Is placed in
the MJS–13 jig.
Page 4
Issue 1 07/99
PAMS
NSE–8/9
Technical Documentation
4.1. Phone is totally dead
This means that the phone doesn’t take current at all when the power switch S416 is pressed or when the watchdog disable pin (X201 pin 11) is grounded. Used battery voltage must be higher than 1,9 V. Otherwise the hardware of the switcher V105 and CCONT (N100) will not operate reliable.
Phone is totally dead.
Measure Vb voltage at
C115
Yes
Measure Vdc_out
voltage
at Vibra pad E103
> 1,9 V
No
Failure in VB.
Check X101, X102 and
Jig or tester
Voltages OK?
Yes
Power doesn’t stay on.
Measure voltage at
2,85v>C117 (Vbb) > 2.7V
2,85V >C102 (VXO) > 2.7V
When PWR switch is pressed or
WDOGDISABLE is grounded.
Measure ”PWRON” voltage at R413
No
Yes
when pwr–switch (S416) is pressed or
Yes
WDDIS is grounded
(R424 connected to gnd).
Voltage less than 0,5V
(Will be low only during
power–up of CCONT
if power switch
is pressed.)
> 3.1V
No
Switcher
Figure 4–1
Issue 1 07/99
– PCB
Faulty:
– N100 circuit – 32KHz or RFclk osc. – Row0 on MAD – Insufficient supply capability of V105 circuit
No
Check R413, V410, S416, R423
N100
Check WDDIS line
Page 5
NSE–8/9
PAMS
Check voltage at
C109
less than 4,8 V
> 3.1 V
No
Switcher
No
Yes
Technical Documentation
Switcher feedback
somehow faulty
check circuitry arround
V105, V108, V109
Check L103 and
capacitors
C111 to C113
Check voltage at
pin 3 of V105
< 0,4 V
No
Check
L102, V101 and
circuitry arround
V109
Yes
Check capacitors C109
to
C113 and coil L103
Yes
Measure voltage
at V105 pin 15
app. 1.25 V
No
Check feedback circuitry
R102, R105, R112
and arround
V108. Or replace V105
Figure 4–2
4.2. Flash programming doesn’t work
The flash programming can be done via panel connector X201 or via service inter­face J100 - J105.
Page 6
Issue 1 07/99
PAMS
NSE–8/9
Technical Documentation
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 service interface J100 - J105.
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 Figure 4–3, Figure 4–4 and Figure 4–5.
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
Issue 1 07/99
Page 7
NSE–8/9
PAMS
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?
Connect watchdog disable
(WDDIS R424 ) to GND.
Technical Documentation
FLASH Programming
doesn’t work.
No
A
Yes
Check WDDIS line:
X201 pin 11 –> R424
No
C117 (Vbb) is typ 2.8V
C102 (VXO) is typ 2.8V
C
Master RESET
(PURX R303) is ”1” (2.8V)
after ca. 62ms
Yes
Yes
B
13MHz clock
C301 towards MAD
500mVpp min.
Yes
and
?
See section ”Phone is
totally dead”.
No
Check sleep clock
(R118 end towards CCONT )
32kHz square wave
No
No Yes
RFC 13MHz 800mV min.
V702 collector
Line OK?
No
Yes
NoYes
Faulty PCB
Check sleep clock circuit.
R121, R122, R123, R124,
C147, C148, C153, B100
and C149
Faulty N100 or
overloaded PURX line
Page 8
Check R727, V702,
R728, R714, G701
Figure 4–3
Check
R743 & C301
Issue 1 07/99
PAMS
NSE–8/9
Technical Documentation
B
Check that the following lines are OK:
FCLK (M–BUS) line: J102, X201 pin 3 –> C306
FTX (fbus_tx) line: J103, X201 pin 1 –> C314
FRX (fbus_rx) line: J104, X201 pin 2 –> C305
(value on all should be 100 ohm)
Check also pull–up and –down resistors: R309, R310, R311
GND: J100, X201 pin 7 –> GND
OK? Repair or defect PCB
No
Yes
Check Service tool
TDS–7 & MJS–13
and
connections
Check that phone is
responding to flash
programming tool as
shown in fig. 4–3 to 4–5
MAD or FLASH faulty.
Figure 4–4
Issue 1 07/99
Page 9
NSE–8/9
PAMS
A
External RAM fault?
Yes
Check pins of SRAM (D302)
Check control lines of SRAM:”MEMC(4:0)”
Technical Documentation
No
ID problem?
NO
Yes
Check type of FLASH
Check soldering of FLASH
Unknown fault. Check for noise on
communication lines
Try phone totally dead.
Check connection from
J105 to R307
Voltage at
R307 >1.7V & <3.6V
during flashing?
Yes
No
Yes
MCU FLASH Vpp
Error
No
Voltage at R307 12V +/–
5% during flashing?
Yes
Flashing from
X201?
Check – that Vpp is not shorted by R307 or C304. – connection from R307 to X201 pin 10 – Check Vpp – Vbb=2.8V – Vpp=12V +/– 5% – Noise on MBUS/FBUS lines
No
Vpp outside supported
YesNo
range.
Page 10
Defect FLASH or
flashing–SW has wrong
version.
Figure 4–5
Issue 1 07/99
PAMS
NSE–8/9
Technical Documentation
4.3. 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 (FLASH), N100 (CCONT), D302 (SRAM) are useful to check at first.
Normally the power will be switched off by CCONT (N100) after 32 seconds, if the watchdog of the CCONT can not be served by software.
Check watchdog is updated. Check that PWRON (at R413) is high and that CCONTCSX (J337) 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 R424 to ground (Watchdog disabled).
Issue 1 07/99
Page 11
NSE–8/9
PAMS
Power doesn’t stay on or
phone is jammed
C109 voltage <4,2V or
>3,1V ?
Check that
CCONTCSX J337
is pulsing and that PWRON
(R413) is high.
Is
Yes
Yes
Technical Documentation
No
Software is able to run in phone,
acknowledging watchdog.
If power is switched off after a few
seconds, check circuit arround V109.
Switcher
No
Connect R424 to GND
Check
VBB typ 2.8V at C117
and
VXO typ 2.8V at C102
and that they are
stable
Yes
C
Figure 4–6
Power doesn’t
stay on or phone is
jammed in idle
or call mode
Call
No
Is
Vdc_out stable
and within
limits?
Yes
N100 circuitry is faulty
No call
Switcher
Call
No
Switcher
Page 12
The LABEL “C” refers to Figure 4–3, The Label “Switcher” referes to Fig­ure 4–2
Issue 1 07/99
PAMS
NSE–8/9
Technical Documentation
4.4. 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.
a) Check Selftest status in WinTesla b) Check that content of EEProm D303 and flash D301 is correct c)
4.5. 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 4–7, Figure 4–8, Figure 4–9 and Figure 4–10).
1. DSP initialization done
2.Synchronization to networknetwork
Network done
1 2 3
3. Registration to Network done.
MAD2Pr1 pin D8 (DSPXF)
J308
The states of DSP (MAD2) after power on
Figure 4–7
Issue 1 07/99
Page 13
NSE–8/9
PAMS
1
init initialize
The states of DSP after power on
Figure 4–8
patch code download
dsp constants download
initializatio done
n
Technical Documentation
MAD2Pr1 pin D8 (DSPXF)
J308
PSW search last PSW
channel scan starts
The states of DSP after power on
Figure 4–9
send RACH RACH OK
2
3
go SDCCH imediate
OK
assigment
OK
synchronizatio OK
n
MAD2Pr1 pin D8 (DSPXF)
J308
MAD2Pr1 pin D8 (DSPXF)
The states of DSP after power on
Figure 4–10
Page 14
J308
Issue 1 07/99
PAMS
NSE–8/9
Technical Documentation
Phone doesn’t register to
the network or
phone doesn’t make a call
Analog supply
voltage to
COBBA is > 2.7V
(C218) and stable
?
Yes
Analog reference
to COBBA is 1.5V
(C205) and stable
?
Yes
Check: Supply voltage Vcp (C132) > 4.8V Supply voltage VRX_1 (C101) > 2.7V Supply voltage VRX_2 (C104) > 2.7V Supply voltage VSYN_2 (C103) > 2.7V during the receiving slot Supply voltage VTX (C125) > 2.7V during the transmitting slot
No
Check N100
No
Check R207, C205, C123
and C124.
Check Vref and load on it
All OK?
Yes
Synthesizer lines: SEna1 R724 SClk R722 SData R722
Pulses 0–>1 during receiving slot
All OK ?
Yes
D
No
Check N100, D300 and load in
RFon defective lines
No
Check D300
Figure 4–11
Issue 1 07/99
Page 15
Loading...
+ 33 hidden pages