Motorola APX 7000 Detailed Service Manual page 109

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Table of Contents

Troubleshooting Charts: Power-Up Failure

Power-Up Failure – Low LDO10 VCC_3.3 Voltage

Low LDO10 VCC_3.3

than 15mA above

Measure SW1 at

Problem, Replace

Measure Radio

Current more

Inspect R6566

3.3 < V < 3.9?

This failure specifically refers to LDO10

but this flow chart can be used to

diagnose LDO9, lDO7, and LDO6. All

LDOs mentioned above are fed from the

same source and have very limited

differences. Please refer to schematic

and theory of operation section for

Board has a short,

Replace VOCON

Correct R6566

Proceed To Low

Voltage Flow

differences.

Troubleshooting