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If the output voltage is correct on N605, measure the resistance of R683 and make sure there is
not a foil damage against J603: 5.
28.4 SIMCONRST is missing
Measure SIMCONRST on V622 pin 6 +5 V
To be able to put SIMCONRST high, SIMVCC must be high, and correct.
If SIMCONRST is missing, measure SIMRST from D600 on V622 pin 1 +3,2 V
If SIMRST is missing, it can depend on bad soldering at D600 pin 73, D600 or a foil damage.
If it is correct, the fault can depend on V622.
If SIMCONRST is correct, measure the resistance of R600 and R687, make sure that there not
is a short circuit in C628 or a foil damage along the path.
28.5 SIMCONDAT is missing
Measure SIMCONDAT on V622 pin 3 +5 V
To be able to put SIMCONDAT high, SIMVCC must be high, and correct.
If SIMCONDAT is missing, measure SIMDAT from D600 on V622 pin 4 +3,2 V
If SIMDAT is missing, it can depend on bad soldering at D600 pin 74, D600 or a foil damage.
If it is correct, the fault can depend on V622.
If SIMCONDAT is correct, check R617, R628, and V621.
Also check for a possible short circuit in C630 or a foil damage along the path.
28.6 SIMCONCLK is missing
Measure SIMCONCLK on D601 pin 4 +5 V
To be able to put SIMCONCLK high, SIMVCC must be high, and correct.
If SIMCONCLK is missing, measure SIMCLK from D600 on D601 pin 2 +3,2 V
If SIMCLK is missing, it can depend on bad soldering at D600 pin 75, D600 or a foil damage.
If it is correct, measure D601 pin 1 +5 V
If the voltage is missing, check V618, C693 and C694.
If the voltage is correct, the fault can depend on D601.
If SIMCONCLK is correct, check R627 and look for a possible short circuit in C629 or a foil
damage along the path.
28.7 All signals are correct
Measure the resistance on J603: 6 against ground zero ohm.
If the resistance is correct, the fault can be due to D600 or bad soldering at any of the
components mentioned in this guide.
4/00021-3/FEA 209 544/18 B
Trouble Shooting Guide, Advanced
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