Nokia CardPhone TROUBLESHOOTING INSTRUCTIONS 08
PAMS Technical Documentation
RPE–1 Series Transceiver
Chapter 8
RPE–1
TROUBLESHOOTING
INSTRUCTIONS
Original 03/98
Copyright 1998 Nokia Mobile Phones. All rights reserved.
RPE–1
PAMS
Troubleshooting
Amendment
Number
Technical Documentation
AMENDMENT RECORD SHEET
Date Inserted By Comments
8 – 2
Original 03/98
After Sales
RPE–1
Technical Documentation
RPE–1 Troubleshooting Instructions
Contents
RPE–1 Troubleshooting Page 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Baseband troubleshooting Page 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General information Page 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Phone is totally dead Page 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Phone does not register to the GSM network or phone doesn’t make a call . .
Page 15
SIM card is out of order Page 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FLASH memory programming not working Page 19. . . . . . . . . . . . . . .
RF trouble shooting principles Page 28. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Quick check RX with WinTesla Page 30. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gather test equipment Page 30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connect test equipment Page 31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Settings Page 31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diagnostic Page 31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting
Quick check TX with WinTesla Page 31. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gather test equipment Page 31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connect test equipment Page 32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Settings Page 32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diagnostic Page 32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RX trouble shooting Page 33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Test equipment Page 33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Procedure Page 33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Settings Page 34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Note Page 34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Test duplexer RX side Page 35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Test LNA Page 35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Test RX RF SAW filter Page 35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Test RF mixer RX side Page 36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Test IF amplifier Page 36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Test 1st IF filter Page 36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Test CRFRT RX part Page 36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Test 2nd IF filter Page 37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TX trouble shooting Page 37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Test equipment Page 38. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Settings Page 39. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Test CRFRT TX part Page 39. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Test RF mixer TX side Page 43. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Test PA–driver Page 43. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Troubleshooting
Test TX RF SAW filter Page 43. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Test power control circuit Page 44. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Test power amplifier Page 45. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Test duplexer TX side Page 46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Check antenna switch Page 46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Synthesizer trouble shooting Page 46. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Test equipment Page 46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Settings Page 47. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VCTCXO (G201) Page 47. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
UHF VCO (G200) Page 48. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
UHF Buffer Page 49. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VHF VCO Page 49. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PLL IC (N202) Page 50. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Repair Page 50. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Technical Documentation
8 – 4
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Technical Documentation
RPE–1 Troubleshooting
Baseband troubleshooting
The main target for this document is to keep repair steps as short as possible.
Error hunting is devided into the following error states:
a) the phone is totally dead, Windows UI prompts:
”There may be a problem with the card hardware. Contact your dealer.”
This may a cause of a real hardware problem, but it would be good to check
with another PC laptop, too, before proceeding further.
b) the phone does not register to the GSM network, or the phone doesn’t make
a call
c) a SIM card is out of order
d) the FLASH memory programming is not working
General information
A reference to the signal line in the GX8 schematic diagrams is marked as
’<name>’, for example ’RESET’ refers to the corresponding line in sheet number 1.
Troubleshooting
Referred test spots are in Figure 16 and Figure 17 beginning with a J letter.
Utility software are used as control or test software:
– RPE1FLA.EXE is software tool to update the FLASH memory contents. See
”Flash Update Instructions” for more information. In this context
RPE1FLA.EXE is also used for testing some hardware lines.
– WinTesla software tool runs on the top of Windows ’95. It is used to run
some MCU self–tests.
The RPE–1 specific service adapter JBT–8 and its accessory AX8 are error
hunting hardware boards.
As hunting errors an expression ’PCMCIA mode’ refers to the Cellurar Card
Phone User Interface running on the top of Windows ’95; JBT–8 has to be in
the PCMCIA mode. No RESET function has not to be generated by the user in
this mode, because a PC wakes up the system. Accordingly an expression
”non–PCMCIA mode” (=”vertical mode”) refers the phone to be controlled by
WinTesla, JBT–8 has to be in the non–PCMCIA mode. A RESET has to be generated manually with an on–board button as inserting the phone onto JBT–8.
Look at Figure 21, Figure 22 and Figure 23 for more details of JBT–8 usage
setups.
It is assumed that the covers are opened before these steps. The component
placement figures of Baseband are later on this document (in Figure 16 and
Figure 17).
Use a PC (of course, with Card Shark and its extension board) or PC laptop full
dupplex capability in order to be able to do a speech call.
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Troubleshooting
Thus to do Baseband hardware error hunting the following software and hardware are needed:
– Wintesla, Cellular Card Phone UI installed; these are running in Windows
’95.
– RPE1FLA.EXE running on the DOS mode (can be activated also from WIn-
dows ’95).
– A four–channel digital oscilloscope to capture a 13MHz signal as the fastest
signal.
– A multimeter
– JBT–8, ACH–6 (AX–8 if needed) and DAU–9P (MBUS & FBUS cable)
– A SIM card
– A failing phone with covers open
In flow charts logical signal levels are referred as follows:
HIGH stands for logic ’1’ : 0.7*Vcc..1.0*Vcc as Vcc is 3.3V±2% (3.23...3.37V) →
LOW stands for logic ’0’ = 0V...0.1*Vcc as Vcc is 3.3V ± 2% (3.23...3.37V) →
2.3...3.3V
0...0.3V
as using nominal 3.3V for Vcc
Technical Documentation
as using nominal 3.3V for Vcc
A tip: Do not always follow instructions truly but with a common sense, for example try to make a service time as low as possible by trying the phone with UI
in spite of being in the middle of some test flow.
Phone is totally dead
Error hunting in this section:
a) Any short–circuits?
b) Powering up the phone not working.
c) The phone does not communicate with the PC at all.
Short–circuits on module?
Before any tests it is good to check visually mechanical parts, and especially
PCB for short–circuits. If any short–circuited component is a part of powering
up the card it may cause booting down the PC laptop accidentially, because too
low a level of voltage on its power supply line causes it to malfunction. This is
risky, too, because an uncontrolled shut–down of the PC laptop may cause its
file system to fail.
Test equipment:
ule
Test setup:
A multimeter with a short–circuit detection and GX8 mod-
GX8 module without covers and a SIM card.
Test target:
inputs of N422 (pin no. 3 or 4) and V421 (pin no. 1, 2, 3, 6 or 7).
Test result:
8 – 6
Main power supply lines ’VCC’ and ’VCCPOWER’ on the
OK if not any short–circuits.
Original 03/98
After Sales
RPE–1
Technical Documentation
Powering up the phone not working
Test follow–up:
”There may be a problem with the card hardware. Contact your dealer.”
Test equipment:
Test setup
needed to the GX8 module without a SIM card.
Test target:
test flow is described in Figure 1 and Figure 2.
Test results:
Troubleshooting
As inserted into the PCMCIA slot UI SW informs that
– A multimeter, a digital oscillope
– JBT–8 (and AX8), DAU–9P
– ACH–6
The external power supply ACH–6 supplies all the current
System clocks that are needed to power–up the phone. A
Look at Figure 3.
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PAMS
Troubleshooting
Check X400 for opens. Any
other opens or short–circuits?
Any strange material on PCB
(from open SIM reader)?
NO
Phone totally dead
1)
in PCMCIA mode
YES
3.2...3.4V on the
2)
input of N422
(pin no. 3 or 4)
YES
2.9...3.1V on the
3)
output of N422
(pin no. 5,6 or 7)
4)
6.0...6.6V on the
output of N420
(pin no. 8)
YES
YES
NO
NO
NO
NO
Technical Documentation
Visually check and repair
Insert a SIM card,
working?
YES
NO
Goto ”A SIM card is out of order”
FINE!
Recheck X400,
especially pin no.
51 and 17. Look
at Figure 18.
Replace N422 Goto 3)
Replace N420 Goto 4)
Goto 2)
YES
5)
6.0V...6.6V on
the output of
N421 (pin no. 8)
YES
6)
3.0...3.2V on the
output of V421
(pin no. 5 or 8)
YES
13MHz system
7)
clk on J408
(look at
Figure 3)
YES
Goto ”Powering up the phone not working 2/2”
Figure 1. Powering up the phone not working 1/2
NO
NO
NO
Replace N421 Goto 5)
Replace V421 Goto 6)
Goto Section ” Synthe-
sizer trouble shooting”
8 – 8
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Technical Documentation
13MHz system
8)
clk on input of
D400 (pin no.
41, look at
Figure 3)
9)
32kHz sleep clk
on J407 (look at
Figure 4)
13MHz system
10)
clk on input of
D420 (pin no.
93, look at
Figure 3)
11)
Phone working
in PCMCIA
mode
YES
YES
YES
YES
NO
NO
NO
NO
Troubleshooting
Replace C400
Replace D400
Replace C427 Goto 10)
Goto ”The phone does not communicate with the PC”
Goto 8)
Goto 9)
12)
Insert a SIM card,
working?
Goto ”A SIM card is out of order”
NO
YES
FINE!
Figure 2. Powering up the phone not working 2/2
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Troubleshooting
Technical Documentation
Figure 3. 13MHz system clock
8 – 10
Figure 4. 32kHz sleep clock on J406
Original 03/98
After Sales
RPE–1
Technical Documentation
Phone does not communicate with the PC laptop
Test follow–up:
”There may be a problem with the card hardware. Contact your dealer.”
Test equipment:
Test setup
needed to the GX8 module without a SIM card. JBT–8 switched between non–
PCMCIA and PCMCIA modes during test steps.
Test target:
scribed In Figure 5 and Figure 6.
Test results:
Troubleshooting
As inserted into the PCMCIA slot UI SW informs that
– A multimeter, a digital oscillope
– JBT–8 (and AX8), DAU–9P
– ACH–6
The external power supply ACH–6 supplies all the current
All the control lines during a wake–up, a test flow is de-
Look at Figure 7.
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Troubleshooting
Non–PCMCIA
mode active
Wintesla can be
started ?
1)
HIGH on the
output of D421
(pin. no 1)
2)
LOW on J439
(also on pin. no
95 of D420)
LOW on
3)
’MODESELX’
line (pin no. 16
of D400)
LOW on
4)
’RESET’ line
(pin no. 15 of
D400)
HIGH on J406
5)
(also on pin no
29 of D400)
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
Technical Documentation
Possibility of
FLASH
CMT code
corruption or
FLASH malfunction
Replace D421 Goto 1)
Replace R434 Goto 2)
Replace R402 Goto 3)
Replace R415
and R417
Replace D400 Goto 5)
Goto ”FLASH memory
programming not working”
Goto 4)
6)
HIGH on
’MAXPURX’ line
(pin no 122 of
D400)
Goto Figure 6
8 – 12
YES
Replace R427 Goto 6)
NO
YES
Figure 5. The phone does not communicate with the PC laptop 1/2
Original 03/98
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RPE–1
Technical Documentation
Non–PCMCIA
mode active
7)
Reset sequence
as in Figure 7
MAD2 oriented
tests begin
here.
8)
HIGH on
’SELFTEST’ line
(on pin. no 17 of
D420)
9)
LOW on
’GENSDIO’ line
(on pin. no 118
of D420)
10)
MAD2 self–test
sequence as in
Figure 8
YES
YES
NO
NO
NO
NO
Replace V425
and V424
Replace R423 Goto 8)
Replace R439 Goto 9)
Replace D420 Goto 10)
Goto 7)
Troubleshooting
11)
External SRAM
component test
with WinTesla
passed
12)
Ext. EEPROM
component test
with WinTesla
passed
13)
ROM code
check sum
passed
14)
Insert a SIM card.
working in PCMCIA
mode
15)
Synchronized
with the GSM
network?
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
Replace D461 Goto 1 1)
Replace D462 Goto 12)
Goto ”The Flash memory programming not working”
Goto ”A SIM card is out of order”
Goto ”The phone does not register to the GSM network
or does not make a call”
FINE!
Original 03/98
Figure 6. The phone does not communicate with the PC laptop 2/2
8 – 13
RPE–1
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Troubleshooting
Technical Documentation
line on D400 pin
no. 16
line on J406
line on D400 pin
no. 15
line on J439
Figure 7. A reset sequence in the non–PCMCIA mode
PURX line on
J406
MCUADDR(0)
line on D420 pin
no. 38
FLASHPWRDNX
line on D420 pin
no. 134
8 – 14
Figure 8. MAD2 (D420) self–test sequence
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After Sales
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Technical Documentation
Troubleshooting
Phone does not register to the GSM network or phone doesn’t
make a call
Test follow–up:
doesn’t show any active operator, or it is not able to create a call.
Test equipment:
Test setup
needed to the GX8 module with a SIM card.
Test target:
Test results:
As inserted into the PCMCIA slot UI SW pops up, but it
– A multimeter
– JBT–8 (and AX8), DAU–9P
– ACH–6
The external power supply ACH–6 supplies all the current
RF/BB interface ASIC, PCMCIA ASIC during a speech call
Look at Figure 9.
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