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NHE-5
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Diagram
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Disassembly
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Installation Instruction
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Non Serviceable Accessories
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Parts List
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SERVICE ACCESSORIES
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Service Manual
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Service Manual
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Service Software Instructions
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System Module
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System Module
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Technical
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Technical Documentation
6 pgs19.75 Kb0
Troubleshooting Instruction
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TUNING Instruction
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Nokia NHE–5 Troubleshooting Instruction

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After Sales Technical Documentation
NHE–5 TROUBLE–
SHOOTING
INSTRUCTIONS
Original 04/97
NMP Part No. 0275076
AMENDMENT RECORD SHEET
After Sales
Technical Documentation
Amendment Number
Date Inserted By Comments
Page 2
Original 04/97
After Sales Technical Documentation
NHE–5 TROUBLESHOOTING INSTRUCTIONS Contents
Introduction Page 4 General Page 4 Baseband Troubleshooting Page 5 Phone is Totally Dead Page 6 Flash Programming Doesn‘t Work Page 7 Power Doesn‘t Stay On or The Phone is Jammed Page 10 The Function of the 32 kHz Clock Oscillator in Test Circumstances Page 10 Display Information: Contact Service Page 12 The Phone Doesn‘t Register to The Network (no serv) or Phone Doesn‘t Make
a Call Page 13 The States of The DSP after Power On Page 13 SIM Card is Out of Order (Insert SIM Card or Card Rejected) Page 15 Audio Fault Page 17
Original 04/97
Page 3

Introduction

General

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 Service Software – Power supply (2.0 A) – Digital multimeter
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Technical Documentation
– Oscilloscope – Spectrum analyzer – Signal generator – RF cables – Modular cable – RS232/MBUS adapter – HP8922H or equal – RF measuring chassis The Troubleshooting for NHE–5 consist of a series of checks according to the
following flow diagrams.
Page 4
Original 04/97
After Sales Technical Documentation

Baseband Troubleshooting

The following hints should facility 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. 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
Original 04/97
Page 5

Phone is Totally Dead

Troubleshooting diagram for this fault is represented in following figure. Check at first that the battery back is OK and it is not empty. This kind of fault has been limited around the system connector (X103) and the PSCLD (N301).
If the phone is totally dead, check that
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Technical Documentation
NO
Check soldered joints of X101 and PCB wires between X101 and N301
Voltage level at PSCLD (N301) pin 25 is same as VBA T
YES
Connect pins 19 and 20 together (X101) and measure that voltage level at pin 25 (N301) drop to zero.
The voltage level at pin 25 (N301) is zero
NO
PSCLD N301 pins 5,21,37...
voltage level is same as VBAT
NO
Check coils L300, L310 and the sol– dered joints of the connector X103
YES
PSCLD (N301) switches power on so the regulated voltages VL, VA and VSL are
3.16V
YES
Rise up PSCLD
pin 25. If the DC voltage is still missing change N301
YESNO
Page 6
Check that capacitors C329, C330, C310 and C311 are soldered. Check also sol­dered joints of N301. If these things are correct, change N301
Check the UI board and the PWR button.
Original 04/97
After Sales Technical Documentation
Flash Programming Doesn‘t Work
The block diagram for the flash programming is shown in figure 12. The flash loading is handled via these components. Thus a fault in other components (DSP, RFI) can not prevent the flash loading.
In error cases, the flash prommer can give some information about a fault. The fault information messages could be: – MCU doesn‘t boot – MCU flash Vpp error – Serial data line failure – Serial clock line failure – External RAM fault – Algorithm file or alias ID don‘t find
In cases that the the flash programming doesn‘t succeed, there is a possibility to test the interface between the ASIC and the MCU. This test is useful to do, when the fault information is: MCU doesn‘t boot or Se­rial clock line failure.
The test procedure is following:
1. Connect a short circuit wire between the test points J154 and J155.
2. Switch power on.
3. If the reset line of the MCU rises up, the interface is OK. Otherwise the reset line stays low.
One must be noticed that this test can be found only short circuits, not open pins. This test indicate also that 32 kHz clock is running because of the test log­ic is made by using 32 kHz clock oscillator.
Original 04/97
Page 7
Flash programming doesn‘t work
After Sales
Technical Documentation
Output voltages of PSCLD (N301) are 3.16 V ( VL, VA, VSL )
YES
Master Reset (Purx), PSCLD pin 26 is ”1” ( 3.16 V )
YES
Master clock input, ASIC (D151) pin 22 is 13 MHz, 1 Vpp, sine wave with 1 V DC level
YES
Clock signal at the input of MCU, pin 51 is 6.5 MHz square wave.
YES
MCU Reset input, pin 48 is ”1”
YES
NO
Check the soldered joints of N301. If OK, change N301
NO
Rise up pin 26. If the logic level is still ”0”, check sol­dered joints of N301. If OK, change N301.
Check components R150 and C156.
NO
If they are OK, check the VCXO block. One must remember that the control signal for the VCXO is taken from the baseband (see figure 6 )
NO
Check resistor R152. Check the soldered joints of ASIC. If OK, change ASIC
NO
Rise up MCU pin 48. If the logic level is still ”0”, check the sol­dered joints of the ASIC. If OK, change ASIC.
Check that the following lines are correct.
1. Vpp line from J304 (X300 pin 1) to FLASH (D400) pin 11 Normal fault information: MCU FLASH Vpp error
2. FRX line from J301 (X300 pin 2) to MCU (D150) pin 2 Normal fault information: Serial data line failure
3. FTX line from J302 (X300 pin 3) to MCU (D150) pin 1 Normal fault information: MCU doesn‘t boot
4. FCLK line from J303 (X300 pin 4) to MCU (D150) pin 3.
Check R315 also.
Normal fault information: Serial clock line failure
5. WDDIS line from J300 (X300 pin 5) to PSCLD (N301) pin 22
6. GND (X300 pin 6) is connect to ground
Page 8
Original 04/97
After Sales Technical Documentation
1. Connect a short circuit wire between the test points J154 and J155
2. Switch power on and measure the state of the MCU Reset line (pin 48) If the Reset line rises up to ”1” state there are not short circuits
In cases that fault information is a) MCU doesn‘t boot b) Clock line serial failure
the ASIC self test function can be used
Reset is ”1”
Check that there are not open pins in components: D150, D151, D400, D402
Reset is ”0”
There is a short circuit between the pins. Check circuits: D150, D151 D400, D402
In case that fault information is: External RAM fault Check the pins of SRAM (D402)
Check also the control lines of SRAM: WrX, RdX from MCU; RAMCS from ASIC
(see figure 12)
In case that fault information is: Algorithm file or alias ID don‘t find, ID is unkwon etc. Check pins of the FLASH (D400)
Check also the control lines of FLASH: WrX, RdX from MCU CSelX, PwrDown from ASIC
(see figure 12)
Original 04/97
Page 9
Technical Documentation
Power Doesn‘t Stay On or The Phone is Jammed
If a fault has come after the flash programming, there are most probably open pins in IC‘s. The soldered joints of IC’s: D150 (MCU), D151 (ASIC), N301(PSCLD), D400 (FLASH), D402 (SRAM) is useful to check at first.
Normally, the power switch off after 30 seconds, if the watchdog of the PSCLD can not be served by software. The power off function can be prevented by connecting a short circuit wire from the PSCLD pin 22 (WDDIS) to the ground.
If the power switches off after 1..2 seconds, the pins of PSCLD and the PSCLD‘s auxiliary components must be checked.
If the phone is jammed, and no other reason has been found, the function of 32 kHz clock oscillator must be checked. This can be done by setting the phone to the ASIC self test mode.
1. Connect a short circuit wire between the test points J154 and J155.
2. Make a short circuit between the ASIC pins 78 and 79.
3. Switch power on.
4. Measure the signal by oscilloscope at pins 78, 79 (ASIC).
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The Function of the 32 kHz Clock Oscillator in Test Circumstances

PSCLD pin 26, PurX (Master Reset)
ASIC pin 78 (MCUIRQ1X) and ASIC pin 79 (MCUIRQ0X)
30.5 us
1 V
Page 10
Original 04/97
After Sales Technical Documentation
NO
Power doesn‘t stay on or the phone is jammed (In case that fault has come af­ter the flash programming).
Connect a short circuit wire from PSCLDs pin 22 to the ground. This make sure that power stays on during the measurements
Output voltages of PSCLD (N301) are 3.16 V (VL, VA, VSL).
YES
Master Reset, PSCLD pin 26, is ”1” (3.16 V)
YES
Master clock input, ASIC (D151) pin 22, 13 MHz about 1 Vpp sine wave signal with 1 V DC level (see figure X)
YES
MCU (D150) clock signal input, pin 51,
6.5 MHz square wave signal (see figure X).
NO
NO
NO
ATTENTION !
Do not forget to check need­ed PCB wires between the circuits.
Check the soldered joints of N301. If OK, change N301.
Rise up pin 26. If the log­ic level is still ”0”, check soldered joints of N301. If OK, change N301.
Check components R150 and C156. If they are OK, check the VCXO block. One must remember, that the control signal for the VCXO power supply is tak­en from baseband (see fig­ure X).
Check resistor R152. Check that Master Reset input pin, ASIC pin 120 is ”1”. If it is ”1” check soldered joints of ASIC. If OK, change ASIC.
YES
MCU reset input, pin 48 is ”1”
YES
Check that there are not open pins in components D150 (MCU), D151 (ASIC), D400 (FLASH), D402 (SRAM)
OK
Check the function of the 32 kHz oscillator (see page 40)
NO
Rise up pin 48. If the logic level is still ”0”, check the soldered joints of the ASIC. If OK, change ASIC.
Original 04/97
Page 11

Display Information: Contact Service

This fault means that MCU is able to run and the watchdog of the PSCLD (N301) can be served. Thus PCLocals functions can be used and some in­formation about the fault is possible to get.
In principle, the fault for contact service information can be found around ASIC (D151), DSP (D152), RFI (N450), EEPROM (D404) or AUDIO CODEC (N200).
Display information: Contact Service
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Technical Documentation
NO
Check the soldered joints of ASIC (D151). If OK, change D151
DSP (D152) pin 66 (or testpoint J152)
NO
39 MHz square wave
YES
DSP pin 69 (XRES) is ”1”.
YES
Check the soldered joints of DSP (D152). If OK, change D152
DSP pin 20 (XF) or testpoint J153
250 ms
Power On
Software download to external RAMs
YES
XF stays ”1” after download
Check soldered joints of DSP (D151) and external RAMs D410, D411
RFI (N450) pin 51 (SYSRESX) is ”1”.
YES
RFI (N450) pin 45: 13 MHz square wave
DSP pin 68: 13 MHz square wave
YES
Check R151 and soldered joints of ASIC (D151). If OK Change D151
NO
Download is failed. Check soldered joints of ASIC (D151 and DSP (D152)
Check the soldered joints
NO
of ASIC (D151). If OK, change D151
Check the soldered joints
NO
of ASIC (D151). If OK, change D151
NO
Page 12
YES
Check soldered joints of RFI (N450), DSP (D152), ASIC (D151)
Check soldered joints of EEPROM (D404) and connections to the MCU (D150).
Check soldered joints of AUDIO CODEC (N200) and connections to the ASIC (D151).
Original 04/97
After Sales
Technical Documentation
The Phone Doesn‘t Register to The Network (no serv) 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 for this could be either the baseband or the RF part. The phone can be set to wanted mode by PCLocals software and try to find reason for fault.
The control lines for RF are supplied both the ASIC (D151) and the RFI (N450). The ASIC handles digital control lines (between ”0” = 0 V and ”1” = 3.16 V) and the RFI handles analog control lines and proper input and output signals.
The DSP uses its external flag outpin (XF pin 20) as an indicator of its opera­tion state. During power up, DSP signals all completed functions by changing the state of the XF pin (see figure 38).

The States of The DSP after Power On

DSP pin 20 (XF)
2 3 4 5
XF (pin 20) is ”1” after power on
1 2
DSP code download starts
DSP code download starts DSP has performed self tests and
3
1
6 7
initalization succesfully
DSP has received SEARCH_LIST
4
command from MCU
( DSP starts channel search)
DSP starts PSW search
5
( Channel has been found) ( Rx and AGC are OK )
PSW has been found
6
( the synthesizer works OK) DSP has received synchroniza–
7
tion. ( AFC works OK)
Original 04/97
Page 13
Phone doesn‘t register to the network or phone doesn‘t make a call
RFI (N450) pins 9,10,11 DC level 4.5 V
NO
RFI (N450) pin 3 (REFOUT) DC level 2.5 V
YES
Technical Documentation
Check transistor V450. Check RF regu–
NO
lator N601. One must remember, that control signal for RF regulator N601 (pins 12 and 16) is taken from ASIC (D151) pin 130 and routed to the RF via PSCLD (N301) pins 17, 13.
After Sales
Check components C452 and C453. If OK, Change
YES
RFI (N450)
ASIC pin 33 (RxPwr) is ”1” during the receive slot ASIC pin 34 (SynthPwr) is ”1” during the receive slot ASIC pin 35 (SEna1X) is ”0” during the receive slot ASIC pin 39 (SCLK) is ”1” during the receive slot ASIC pin 38 (SDATA) is ”1” during the receive slot
GT8 GT7
YES
RFI pin 16 (TXCOUT) is ”1” during the receive slot RFI pin 24 (PDATA0) is ”1” during the receive slot RFI pin 24 (PDATA0) is ”1” during the receive slot RFI pin 54 (RXINN): DC level 1.6 V during rec. slot RFI pin 55 (RXINP): DC level 1.6 V during rec. slot RFI pin 64 (AFC) : 1 V < DC level < 3 V
NO
Check the soldered joints of RFI (N450) and the con-
Use service Software functions to turn transmitter on
nections to the RF part
Check the soldered joints of ASIC (D151) and the connections to the RF part
RFI pin 16 (TXCOUT) is ”1” during the receive slot RFI pin 52 (RefRX): DC level 1.6 V
YES
RFI pin 53 (RXIAux) DC level 1.6 V during rec. slot RFI pin 55 (RXINP): DC level 1.6 V during rec. slot RFI pin 64 (AFC) : 1 V < DC level < 3 V
NO
Check the soldered joints of RFI (N450) and the con­nections to the RF part
YES
CHECK RF P ART
Page 14
ASIC pin 31 (TXP) is ”1” during the transmit slot ASIC pin 32 (TXPWR) is ”1” during the transmit slot
YES
4.6 ms
RFI pin 1 (TXQN) RFI pin 2 (TXQP) RFI pin 12 (TXIN)
2.6 V
1.1 V
RFI pin 13 (TXIP)
0.6 ms
NO
Check the soldered joints of ASIC(D151) and the connections to the RF part
NO
Check the soldered joints of RFI (N450) and the con­nections to the RF part
Original 04/97
After Sales
Technical Documentation

SIM Card is Out of Order (Insert SIM Card or Card Rejected)

The hardware of the SIM interface from the ASIC (D151) to the SIM connector (X102) can be tested without SIM card. When the power is switched on and if the BSI line is grounded by resistor, all the used lines (VSIM, RST, CLK, DATA) rises up to ”1” (5 V) four times. Thus the fault can be found without SIM card most of the cases.
Display information: Insert SIM card or card rejected
YES
ASIC (D151) pin 25 (CARD­DETX):
NO
DC level < 2 V, when 68k resistor is connected from BSI line (X103 pin 14) to the ground
YES
PSCLD (N301) pin15 (SIMENA):
NO
pulses up to ”1” (3 V), when the power is switched on
YES
PSCLD (N301) pin 10 (SIM_I/O_CTRL): pulses up to ”1” (3 V), when the power is switched on
YES
SIM CONNECTOR (X102) pin C1 (VCC): pulses up to ”1” (5 V), when the power is switched on
YES
SIM CONNECTOR (X102) pin C2 (RST): pulses up to ”1” (5 V), when the power is switched on
YES
PSCLD (N301) pin 9 (SIMRST_A): pulses up to ”1” (3 V), when the power is switched on
Check resistors R311 and R312 Check system connector X103 pin 14 (BSI)
Check connection to the ASIC; pin 30 Check also soldered joints of ASIC (D151) and PSCLD (N301)
Check connection to the ASIC;
NO
pin 26. Check also soldered joints of ASIC (D151) and PSCLD (N301
NO
Check connection to the PSCLD (N301) pin 41 and the soldered joints of PSCLD (N301)
NO
PSCLD (N301) pin 2 (SIMRST_S): pulses up to ”1” (5 V), when the power is switched on
NO
Check R322
YES
Original 04/97
NO
Check connection to the ASIC; pin 28 (SIMRESETX). Check also soldered joints of ASIC (D151) and PSCLD (N301
YES
Change N301
Page 15
SIM CONNECTOR (X102) pin C3 (CLK): pulses up to ”1” (5 V), when the power is switched on
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Technical Documentation
SIM CONNECTOR (X102) pin C3 (CLK): pulses up to ”1” (5 V), when the power is switched on.
YES
PSCLD (N301) pin 8 (SIMCLK_A): pulses up to ”1” (3 V), when the power is switched on.
Check connection to the ASIC (D151), pin 29 (SIMCLK) Check also soldered joints of the ASIC (D151) and the PSCLD (N301)
SIM CONNECTOR (X102) pin C7 (DATA): pulses up to ”1” (5 V), when the power is switched on.
NO
PSCLD (N301) pin 1 (SIMCLK_S): pulses up to ”1” (5 V), when the power is switched on.
Check R324
YESNO
Change N301
PSCLD (N301) pin 3 (SIMDATA_S): pulses up to ”1” (5 V), when the power is switched on.
YESNO
YESNO
PSCLD (N301) pin 7 (SIMDATA_A):
Check R323
pulses up to ”1” (3 V), when the power is switched on.
NO
YES
Change N301
Check connection to the ASIC (D151), pin 27 (SIMDATA) Check also soldered joints of the ASIC (D151) and the PSCLD (N301)
Page 16
Original 04/97
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Audio Fault

In cases that audio routings are totally muted, a fault could be in serial bus. This serial bus is used for PSCLD (N301) and for Display driver also, so if the PSCLD and the display are OK, there are open pins in the AUDIO CODEC (N200) or the AUDIO CODEC is faulty.
Serial bus faults can be found with PCLocals software (self test). Other possibilities are that PCM clock and sync lines are open. CODEC (N200),
ASIC (D151) and DSP (D152) must be checked (see figure 27).
Keytones are missing and the earphone and the micro­phone are muted during a call.
CODEC (N200) pins 2,3,15 (VA):
3.16 V
YES
YES
NO
Check the soldered joints of PSCLD (N301). If OK, change N301
Check Audio interface with the PClocals software.
NO
Check the soldered joints of ASIC (D151). If OK, change D151.
ASIC (D151) pin 40 (PCMDCLK): clock starts, when the power is switched on.
Check UI board and connector X101
Result: OK
YES
Result: Fault
CODEC (N200) pin 11 (CCLK): pulses up to ”1”, when the power is switched on. CODEC (N200) pin 12 (CSX): pulses down to ”0”, when the pow­er is switched on. CODEC (N200) pin 13 (CDI): pulses up to ”1”, when the power is switched on.
NOYES
Check the serial bus lines to the ASIC (D151)
Change CODEC (N200)
Original 04/97
Page 17
Keytones are OK. The earphone and the microphone are muted during a call.
YES
After Sales
Technical Documentation
ASIC (D151) pin 41 (PCMSCLK):
NO
clock starts, when the power is switched on.
YES
DSP (D152) pin 29 (FSR0):
NO
clock starts, when the power is switched on.
YES
DSP (D152) pin 27 (CLKR0):
NO
clock starts, when the power is switched on.
Keytones are OK. Microphone (uplink) is OK. Earphone (downlink) is muted during a call.
YES
DSP (D152) pin 33 (CLKX0):
NO
clock starts, when the power is switched on.
Check the soldered joints of ASIC (D151). If OK, change D151.
Check the soldered joints of ASIC (D151) and DSP (D152).
Check the soldered joints of ASIC (D151) and DSP (D152).
Check the soldered joints of ASIC (D151) and DSP (152)
YES
DSP (D152) pin 37 (FSX0): clock starts, when the power is switched on.
YES
CODEC (N200) pin 10 (DR): PCM signal during a call
NO
Check the soldered joints of ASIC (D151) and DSP (152)
NO
Check the soldered joints of CODEC (N200) and DSP (152)
Page 18
Original 04/97
After Sales Technical Documentation
Keytones are OK. Earphone (downlink) is OK. Microphone (uplink) is muted during a call.
DSP (D152) pin 31 (DR0): PCM signal during a call
YES
YES
NO
Check the soldered joints of CODEC (N200) and DSP (152)
DC bias voltage (2.2 V) at MICP pin during a call
NO
Check the soldered joints of CODEC (N200) and bias voltage transistor V200, R201, R202.
Original 04/97
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