TM8100/TM8200 Service Manual
Power Supply Fault Finding
177
© Tait Electronics Limited
November 2007
4.
For the internal-options power-sense option the link
LK4
should be
inserted (see
Figure 7.2
). C3.3V DC (more than 2.6V to
be precise) from the power supply to the
IOP GPIO
7
line (pin 15 of the
internal-options connector
SK102
). Check that the power-up signal
at pin 5 of
IC602
(see
Figure 7.1
) is high.
Remove the +3.3V supply and ground the
IOP GPIO
7
line (to be
precise the voltage on the line should be less than 0.6V). If the power-
up signal is now low, conclude with
Step 5
. If it is not, check for
continuity and shorts to ground between
D604
(see
Figure 7.1
) and
pin 15 of the internal-options connector
SK102
. Repair any fault and
go to
Step 5
.
5.
After checking all the relevant power-up options, and if necessary
repairing any faults, go to
“Final Tasks” on page 163
. If the fault
could not be found or repairs failed, replace the board and go to
“Final Tasks” on page 163
.
Summary of Contents for TM8100 mobiles
Page 1: ...TM8100 mobiles TM8200 mobiles Service Manual MMA 00005 05 Issue 5 November 2007...
Page 10: ...10 TM8100 TM8200 Service Manual Tait Electronics Limited November 2007...
Page 12: ...12 TM8100 TM8200 Service Manual Tait Electronics Limited November 2007...
Page 20: ...20 Introduction TM8100 TM8200 Service Manual Tait Electronics Limited November 2007...
Page 64: ...64 Description TM8100 TM8200 Service Manual Tait Electronics Limited November 2007...
Page 106: ...106 TM8100 TM8200 Service Manual Tait Electronics Limited November 2007...
Page 134: ...134 General Information TM8100 TM8200 Service Manual Tait Electronics Limited November 2007...
Page 168: ...168 Servicing Procedures TM8100 TM8200 Service Manual Tait Electronics Limited November 2007...
Page 464: ...464 Spare Parts TM8100 TM8200 Service Manual Tait Electronics Limited November 2007...