Mitsubishi Electric TRIUM 110 Service Manual page 14

LOCATION UPDATE
No service EGSM & DCS
No service EGSM & DCS
No training sequence
No training sequence
RX level no good
RX level no good
RX level no good
RX Qual > 2
Call drop
POWER ON PROBLEM
No power on
No power on
No power on
No power on
Switch off itself
Normal consumption in TestMode : 20mA to 25mA
DOWNLOAD PROBLEM
Pb of downloading
SIM PROBLEM
Check SIM
Check SIM
BIT Error / PHASE Error
Bit error/frame error
Frequency error
Phase error
Version A
Date: 05/02
13/22
TX & RX good in test mode
After a soft updating still no good
Check VREF3, if parasite exist
No modulation
With a –83db signal check the RSSI (= 27 ±4),
RSSI good (10< <100) and the mobile lose the network
RSSI no good, RSSI > 100
RSSI no good, RSSI < 10
RX qual no good
Call stop at any time
"Checksum error" during a software download
( Keypad flashing )
Check the position of the key rubber
Check J101 (batt connector) broken, missing
Check the contact with the board
Mobile turn on if the power key is pressed continuously, and
switch off when the power key is released
Mobile turn off itself
Error during a software download
Check the J301 soldering + contacts position
Check the connecting between the SIM and the connector
Compare RX demodulated signals (RXIN, RXIP, RXQP,
RXQN) with a good mobile, if no good change one-C
Adjust the error frequency with MT Tools (mode repair –
TCXO), still no good change IC401
Pb of modulation
+:
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Service Manual
Trium 110
Soft updating
IC300
Change C155, check C101
IC401
IC300
IC300
SW700
IC300
Soft updating, IC300,
IC401
Flash (IC200) defective
(soldering)
Replace the key rubber
J101
IC300 (soldering)
Soft updating, check J101
Retry , Change IC200,
IC300
J301
Raise the SIM connector
IC300, IC401,SW700
IC401, 13MHz,
IC300,IC600
IC401, IC600, X600