Motorola APX 1000 - Page 116

5-18 Troubleshooting Charts: DC Supply Failure
DC Supply 1.85 Volt Failure
Yes
No
Yes
Voltage 3.6V?
Verify BGAP_COMP
is present.
2.2 < V < 2.7?
Check BGAP_COMP
circuitry
Check if U6101,
U6405, U6301 and
U6304 is draining
high current
Check for damage
to Q6507
Check for connector
damages from J2301 to
frontkit flex
Check if keypad is
draining high
current.
Verify V_SW_3.60 is
present at R6510
Replace main board
Refer troubleshooting guide
5.4.2 DC supply 3.6V
V_EXT_1.85
No
Check U6508
circuitry
Check BGAP_COMP
circuitry
Check if U6302 is
drawing high
current thru E6501