Motorola StarTAC 160 Service Manual page 41

StarTAC 160 (GSM)
Is +2.75V present
at U701 pins 33,
34, 42, 124?
Does U900 pin 30
reset line go high?
Remove any short on the
watchdog pull up
pads R904.
Does U900 pin
31 watchdog line
go high?
Tie the watchdog line
high by shorting the
watchdog pull up
pads R904.
Is CE signalling
present for U702 at
U804 -5&4 and U705
at 27 respectively?
34
1
NO
YES
NO
YES
NO
YES
NO
YES
2
Proceed to "#5 NPU Repair Procedure" on page 38.
Proceed to "#6 NPU Repair Procedure" on page 38.
Proceed to "#7 NPU Repair Procedure" on page 38.
Proceed to "#8 NPU Repair Procedure" on page 39.
Issue 1.0 2/6/98