PHONE IS DEAD
- This means that the phone doesn't use any current at all when supply is connected and/ or power key is pressed.
- It is assumed that the voltage supplied is 3,9Vdc. UEME will prevent any functionality at battery/supply levels below 2,9Vdc and the software will shut the phone down at 3,1Vdc.
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Phone is dead
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Yes
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Measure voltage on L260, L261,
L262, L263, L264, L265 and L206.
Should be ~3,9V
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No
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Failure in VBAT line:
Check X100, L260, L261, L262,
L263, L264, L265, L206, C260,
C261, C262, C283 and pwb
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Yes
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Measure voltages on both sides of
R302 when power key is pressed.
Should be ~0V.
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No
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Check
R302, S323 (power key) and
pwb
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Yes
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Sleep clock on J401:
~32,768kHz, 1,8Vpp
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No
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Check:
B200, C209, C210, D200 and
PWB
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Yes
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Measure voltage on PURX =
1,8Vdc on J404 or N131 pin 3
~1sec after power key is pressed
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No
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Check
D200 and pwb
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Yes
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Measure voltage on VR3=2,78Vdc
on C295 pin1
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No
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Check
D200, C295 and pwb
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Yes
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Verify that system clock is @
~26MHz, min 300mVACpp on
C422 pin2 towards D400 (TIKU)
with regular probe Cin ~10-13pF /
10M
Yes
Check:
D400 (TIKU) and D450, D451
(Flashes) and D455 SDRAM
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No
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Check
C422, R420, C514, C515, L515,
N500 (Helgo), G501 (26MHZ
XTAL) and pwb.
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- If this kind of a failure is presenting itself immediately after FLALI, it is most likely caused by ASICs missing contact with PWB.
- If the MCU doesn’t service the watchdog register within the UEME, the operations watchdog will run out after approximately 32 seconds. It is not possible to measure this service routine.
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Phone doesn't stay on or phone is
jammed
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Yes
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Sleep clock on J401:
~32,768kHz, 1,8Vpp
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No
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Check:
B200, C209, C210, D200 and
PWB
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Yes
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Verify that system clock is @
~26MHz, min 300mVACpp on
C422 pin2 towards D400 (TIKU)
with regular probe Cin ~10-13pF /
10M
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No
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Check:
C422, R420, C514, C515, L515,
N500 (Helgo), G501 (26MHZ
XTAL) and pwb.
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Yes
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Measure voltage on PURX =
1,8Vdc on J404 or N131 pin 3
~1sec after power key is pressed
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No
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Check
D200 and pwb
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Yes
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UI functionality and keys react to
pressure
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No
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Check:
D400, D450, D451, Z300, Z301,
UI-board, keymat, lightguide and
Pwb
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Yes
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Is everything working until phone
shuts down after ~32sec
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Yes
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Change D200 (UEME
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No
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Retest and if phone still doesn't
work change whole engine board
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The flash programming
on RH-12/RH-28 boards is only possible via the pads on the PWB.
In case of Flash failure in
production (FLALI station), problem is most likely related to SMD problems.
Possible failures could be Short-circuiting of balls under μBGAs (e.g. UEME,
TIKUEDGE, SDRAM, FLASH), missing or misaligned components. In flash programming error cases the flash
prommer (via Phoenix or Darium) can give some information about the fault. The
fault information messages could be:
- Phone doesn't set Flashbus TXD line high after VCC is switch on.
- External RAM test failed.
These errors are some of the most common errors and based on this, a fault finding diagram for flash programming is shown below. Various errors can appear from the prommer when flashing the phone - not all of them can be directly linked to the HW or phone.
Because
of the use of uBGA components, it is not possible to verify on the diagram, if
there is a short circuit in control and address/data lines on TIKUEDGE, NOR
flash, NAND flash or SDRAM
SIM FAILURE
The hardware of the SIM interface
from the UEME (D200) to the SIM connector (X386) can be tested without a SIM
card. When the power is switched on, the phone first checks for a 1,8V SIM card
and then a 3V SIM card. The phone will try this four times, where after it will
display "Insert SIM card".
The error ”SIM card rejected” means
that the ATR message received from the SIM card is corrupted, e.g. data signal
levels are wrong. The first data is always ATR and it is sent from card to
phone.
DISPLAY FAILURE
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Is display
working?
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No
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Measure Vflash1 @
L302 towards X302
(display connector).
Should be ~2,78Vdc
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No
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Check:
X302, C311, L302, C310,
D200 (UEME) and PWB
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Yes
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Measure VIO @ L301
towards X302 (display
connector). Should be
~1,8Vdc
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No
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Check:
X302, C309, L301, C308,
R307, D200 (UEME) and
PWB
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Yes
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Are LED's working?
Measure Vout on
C304 = ~13,5V
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No
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Check:
N300, C304, R308, R312,
R306, X302, R305, X300, pwb
and UI board
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Yes
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Measure RESX on
X302 - pin 24. Should
be ~1,8V
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No
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Check
D400 (TIKU) and pwb
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Yes
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Phone should work. If
not change engine
board
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