9-10

Troubleshooting Charts: Display Failure

 

 

 

Display Failure—Page 3

Use an oscilloscope to check for a low-level (0V) pulse occurrence during power-on initialization period.

Use an oscilloscope to check for either a low-level (0V) pulse or high-level (0-V2) occurrence during power-on initialization period.

3

Check Active Low Status on both RESET and CS

Low-

Level Pulses

Present?

Yes

Check J301, pins

7 and 10 for

appropriate voltage

levels (0-V2)

Signal

present

at appropriate

level?

Yes

Replace

Display

No

Return radio to

service depot for

 

 

further analysis

No

MAEPF-27507-B

November 11, 2004

6881094C12-A

Page 114
Image 114
Motorola SSETM 5000 service manual Check Active Low Status on both Reset and CS