Index
340S2
Rev : B
5.19 Modem failure
Modem Failure
Check Driver install &
Telephone Line is OK?
Check IRQ, COM port
setting is OK?
AT command test
modem function is OK
Board-level trouble shooting
Replace another known good modem
DAA module.
Correct it
Correct it
Re-install Drivers
Connect it
No
Yes
No
No
Yes
Check modem DAA board is
connected properly and
wiring with the phone jack
No
Yes
Summary of Contents for 340S2
Page 6: ...Chapter 1 General System Description 340S2 6 Rev B ...
Page 18: ...Chapter 2 Connectors Switches 340S2 18 Rev B ...
Page 38: ...Chapter 4 System Disassembly 340S2 38 Rev B SB3052P TL594 29LV020 ...
Page 48: ...Chapter 4 System Disassembly 340S2 48 Rev B 4 5 ...
Page 88: ...t 340S2 Rev B ...