Motorola APX 7500 - Page 126

September 9, 2011 68009482001
7-10 Troubleshooting Charts and Error Codes Troubleshooting Charts
Figure 7-8. Controller Board DC Voltages - D
VCC_3.3V
VCC_1.8V
VCC_2.8V
No
No
No
VCC_1.6V
Yes
Yes
No
Yes
VCC_5V present at U1300-1
VCC_1.35V
No
Yes
Yes
VCC_2.85V
No
Yes
VCC_NAUT_1.5V
No
Yes
Is 3.3V
present at
R1332?
Is 2.8V
present at
R1335?
Is 1.8V
present at
R1369?
Is 1.6V
present at
R1334?
Verify 0 Ohm jumper R1332 is placed properly.
Check/Replace PCIC U1301.
Verify 0 Ohm jumper R1335 is placed properly.
Check/Replace PCIC U1301.
Verify 0 Ohm jumper R1369 is placed properly.
Check/Replace PCIC U1301.
Verify 0 Ohm jumper R1334 is placed properly.
Check/Replace PCIC U1301.
STOP
STOP
Is 1.35V
present at
R2320?
Verify 0 Ohm jumper R2320 is placed properly.
Verify R1394 is placed & measures 15K.
Verify R1395 is placed & measures 10.2K.
STOP
STOP
Is 2.85V
present at
R1345?
Verify 0 Ohm jumper R1345 is placed properly.
Verify R1343 is placed & measures 10.2K.
Verify R1344 is placed & measures 13.7K.
Check/Replace Voltage Regulator U1304.
STOP
Is 1.5V
present at
R1358?
Verify 0 Ohm jumper R1358 is placed properly.
Verify R1356 is placed & measures 15K.
Verify R1357 is placed & measures 2K.
Check/Replace Voltage Regulator U1307.
STOP