Service manual

Service Manual
Trium 110
Version A
Date: 05/02
13/22
+:
(:
FAX:
Mitsubishi Electric Telecom Europe S.A.
After Sales Services
Z.A. Pigeon Blanc, 35 370 St Germain du Pinel France
[phone]
[phone]
LOCATION UPDATE
No service EGSM & DCS
TX & RX good in test mode Soft updating
No service EGSM & DCS
After a soft updating still no good IC300
No training sequence
Check VREF3, if parasite exist Change C155, check C101
No training sequence
No modulation IC401
RX level no good
With a –83db signal check the RSSI (= 27 ±4),
RSSI good (10< <100) and the mobile lose the network
IC300
RX level no good
RSSI no good, RSSI > 100 IC300
RX level no good
RSSI no good, RSSI < 10 SW700
RX Qual > 2
RX qual no good IC300
Call drop
Call stop at any time
Soft updating, IC300,
IC401
POWER ON PROBLEM
No power on
“Checksum error” during a software download
( Keypad flashing )
Flash (IC200) defective
(soldering)
No power on
Check the position of the key rubber Replace the key rubber
No power on
Check J101 (batt connector) broken, missing
Check the contact with the board
J101
No power on
Mobile turn on if the power key is pressed continuously, and
switch off when the power key is released
IC300 (soldering)
Switch off itself
Mobile turn off itself Soft updating, check J101
Normal consumption in TestMode : 20mA to 25mA
DOWNLOAD PROBLEM
Pb of downloading
Error during a software download Retry , Change IC200,
IC300
SIM PROBLEM
Check SIM
Check the J301 soldering + contacts position J301
Check SIM
Check the connecting between the SIM and the connector Raise the SIM connector
BIT Error / PHASE Error
Bit error/frame error
Compare RX demodulated signals (RXIN, RXIP, RXQP,
RXQN) with a good mobile, if no good change one-C
IC300, IC401,SW700
Frequency error
Adjust the error frequency with MT Tools (mode repair –
TCXO), still no good change IC401
IC401, 13MHz,
IC300,IC600
Phase error
Pb of modulation IC401, IC600, X600