Motorola A3100 Troubleshooting Manual page 20

Can't access the Micro SD Card
• If the T-Flash card can not be detected, check if the pin12 of J16 is
low. If not, check if J16 is OK.
• If pin12 of J16 is low when inserted, check if pin5 of J16 is 3V. If not,
check U2.
• Check if all the clock and data pins are normal. If not, check U1.
Service Engineeing & Optimization
Level 3 , Rev.1.0
T-Flash Slot J16